Electric stove furnace lid is fireproof material

The structure of electric stove lining
Electric stove by furnace lid (wall carrying furnace on the head (boiler setting) make body of heater with hearth. Crust of body of heater is armor plate. Liner is formed by fireproof material, divide slope of hearth, furnace, bath and furnace wall. Furnace wall one party is furnace door, other one party is tapping mouth is interlinked with tapping chamfer. Furnace lid is portable, outer shroud is steeliness, it is more water-cooled, coping is encircled except water-cooling beyond, all form by fireproof material.
Molybdenum of electric stove refine serves as main heat source with electric energy, use three photograph alternating current or direct current. Electric arc arises directly between charging and electrode, use electric camber fused charging, join agent of oxidizer, slagging, ferroalloy to wait next with purify be mingled with. molten steel chemistry composition and temperature adjust steel of the infuse after be worth to the regulation to wrap.
Raise yield to reduce power consumption, electric stove still uses heavy oil or blow oxygen to quicken fusion. As a result of the temperature inside furnace tall, atmosphere changes short, charging is cycle of big, smelt commonly cold conditions, accordingly, electric stove lining often is in Zuo lukewarm, slaggy erode and urgent cold urgent hot condition.
The place with inferior life of electric stove lining is furnace wall, because working requirement is slashing,in high temperature thermic load of surface of electric stove of next slaggy high power, lining wants to achieve 1000W/m2, bear the heat radiation of the electrode arc that temperature Zuo amounts to 6000 ℃ , temperature of heat molten steel is as high as 2000 ℃ . For this, use bubble broken bits generally to alleviate arc is right the radiate of furnace wall, adjust at the same time the power input of three-phase electrode is lopsided degree, control voltage 2 times to improve and carry life of lining of electric stove of excellent Zuo power.
As electric stove large change, freeboard power is changed, intelligence changes development, raise taller requirement to fireproof material. Fireproof material liner is like body of UHP electric stove graph 2-2 place is shown. The century of direct and relevant.20 such as discretion of the corrode caustic rate of fireproof material and furnace size, power 70 time are prime, electric stove uses fireproof data is with improving ability qualitative, appearance and build by laying bricks or stones build a method to reduce use up. 70 time later period, develop as technology of electric stove smelt, wall of furnace lid, furnace begins to use water-cooling and gain ground very quickly, after this, device of the fine outside developing heat to produce special steel (LF) , in the meantime, tapping means by type of EBT of groovy type instead, water-cooling area increases, fireproof data unit is used up reduce subsequently. To 80 time, fireproof material uses up furnace lid achieve 10kg/t the following, its spend 90 time reduce 0.5kg/t the following. Fireproof material uses up furnace wall to be 1.0kg/t, total fireproof material uses up electric stove for 2.0kg/t, although furnace lid and increase of unit of furnace wall water-cooling reduced fireproof material integrated wastage, but taller and taller to the performance demand of fireproof material.

Furnace lid uses fireproof data
Electric stove furnace lid is the spherical shape structure that contains electrode aperture and smoke evacuation aperture. Outer shroud part says advocate furnace lid, intermediate part calls port the lid (call trigonometry area) again, the furnace lid when feed a machine can removed. If graph 2-3 place is shown,electric stove builds diagram.
1 electric stove covers water-cooling technology
Because high power operation makes the productivity of electric stove increases, but also make the thermic load of fireproof material increases furnace lid significantly at the same time, as a result is used impossibly improve fireproof material to prolong furnace lid service life. Because this develops,popularize water-cooling technology quickly.
Water-cooling technology is 20 centuries 80 time from advocate furnace lid begins. Advocate furnace lid Zuo uses water-cooling structure, small furnace lid is bricklaying and indeterminate form fireproof material is prefab piece, make fireproof material uses up furnace lid reduced an in part, achieve 1.5kg/t.
20 centuries the later period in 80 time, in 2 voltage low small furnace lid also used water-cooling, realized complete water-cooling furnace lid then. Furnace lid of electric stove complete water-cooling is used generally already now, only a brick all round electrode is fireproof material, the fireproof material of electric furnace lid is used up already dropped 0.1kg/t is the following.
Water-cooling furnace lid solders with boiler armor plate and become, whole furnace lid connects water to cool. There is 3 electrodes opening only on water-cooling furnace lid is with fireproof material or whole fireproof prefabricated component build by laying bricks or stones is built, usable also and indeterminate form is fireproof material, use corundum for example pouring makings undertake pouring, cause dozen of arc in order to prevent furnace lid of electrode collision water-cooling and by puncture.
Big furnace lid is box type model or structure tubal form, small furnace lid breaks up a water structure for interior commonly. The water-cooling furnace lid that academy of Beijing metallurgy equipment designs, use at city of Home Zhang harbor from 1991 always since electric stove of 70tUHP of new steely plant, move good, ton steel cost drops apparent. This device by water-cooling furnace lid and water-cooling furnace wall two parts are comprised. Water-cooling furnace lid manages type construction for radial, by refrigeration of compulsive convection cooling water. The 3 electrode aperture that part of furnace lid center builds for firebrick build by laying bricks or stones, central port covers service life 300 times or so. Reach in furnace lid wall go up to express and have fireproof material overburden, bury beforehand inside the layer have the reinforcement that prevents fireproof material to fall off. Current, the 50tUHP electric stove of company of the steel in the 30tUHP electric stove of special steel company and Fujian already used the Great Wall furnace lid of this kind of homebred water-cooling, obtain good technical economic benefits,
90 time developed whole gush to drench type water-cooling method. Original case structure, slack situation produces sometimes when pressurization connects water, slack volume became much continue to use hard. Gush drenchs water-cooling is onflow is formed below urine quantity, conduct heat coefficient increases greatly, and with often press a water, slack volume is little but safety is used. Gush drenchs water-cooling condition applies to wall of furnace lid of freeboard power cable, furnace, smoke evacuation the place such as bent housing. Gush drenchs cooling furnace lid has the good performance that hang broken bits. The gush of American Plymenth factory and German Badishe factory drenchs life of cooling furnace lid exceeds 1000 furnace, japanese Great Harmony makes steel company buckle life of much plant long life to be able to amount to 9000 furnace. The comparison that gush drenchs refrigeration and convention cool (wall of furnace lid, furnace and smoke evacuation bent housing) 2-1 seeing a table. Gush drenchs fireproof material life raises area of triangle of cooling furnace lid about one times.
According to statistic of American Vcar company. Use gush to drench the effect of cooling system is as follows:
(Because 1) is managing fireproof material and reduce hot shutdown time and maintenance time, ton economic benefits can amount to steel 35 dollars;
(2) gush drenchs water-cooling conducts heat coefficient is tall, water consumption reduces 50%;
(Because 3) is used often press water, security raises; greatly
(4) structure is simple, weight is reduced.
2 report furnace lid uses fireproof data
1 furnace lid is fireproof the working requirement of material
Liner of electric stove furnace lid is the weak point of whole body of heater, if graph 2-4 place is shown,furnace lid uses the position of fireproof material.
Fireproof material suffers furnace lid operation element and structural element influence. Operation element includes exercise rate, high-power to use up, with oxygen number of furnace of bulk comparing, to oxigenate is compared and number of furnace of answer broken bits is compared etc. Structural element basically is furnace size, furnace lid ply and bath - the distance between furnace lid. Baconian rise the factor that affects furnace lid life has:
(1) thermal shock. Electric arc heats, the temperature leap; that tapping and furnace lid shift cause
(2) chemistry is eroded. Slaggy molten steel splatters to bricky face, cause chemistry to erode, and the CO inside furnace, CO2 and SO2 the action; that wait
(3) arc radiate. Electric arc heats the frit caustic; that the heat radiation of generation causes
(Of the high speed breath that the high speed inside 4) furnace takes dirt to form wear away;
(5) vault structure falls in self-prossessed action, because the brick seams go ahead of the rest to damage the structure that create becomes loose,wait
The put together collaboration of these a few kinds of elements is used, produced major effect to furnace lid life. The superhigh temperature aggravate that arc radiate causes chemistry erodes; of slaggy molten steel erode, bring about ply of fireproof material liner to decrease thin change with the structure, flake in what fireproof material quickened below thermal shock action mar.
Accordingly, furnace lid asks to have good heatproof shake sex with fireproof material, to splash of slag high temperature fight aggressivity, and integral sex is good, well-set not craze.
Is the development trend that furnace lid uses fireproof data: ? ?rarr; is prefab a → whole is pouring, each country is specific the condition is differ, use material pledges very much identical.
Furnace lid of 2 bricks build by laying bricks or stones
(1) silica brick. Furnace lid of 50 time phone uses 20 centuries silica brick (Si0293%〜95%) build by laying bricks or stones is built, its are true proportion is small for 2.37〜2.39, cheap of qualitative small price, have good high temperature structure intensity and fight creep function. Total silicon pledges furnace lid brick is used at 30t electric stove, longevity life is made an appointment with 80 times, use at 100t large electric stove, life is 25〜35 second. 60 time later period, electric stove steel-making begins to popularize the technology that blow oxygen, steel-making operates farther aggrandizement, furnace lid of this kind of acidity silica brick is incommensurate alkalescent smelt, and smelt temperature already the temperature of tower above silica brick, Zuo is lukewarm the frit drop phenomenon with the SiO2 successional generation after next melt, bring about slag alkalinity to reduce, influence smelt works, consequently development used the tall aluminous brick with better performance.
(Furnace lid of brick of 2) tall aluminium. Build by laying bricks or stones of tall aluminous brick builds electric stove furnace lid only then at 50 time end. American steel company is mixed at that time Armco steel company, use furnace lid of tall aluminous brick (A12O365%〜80%) raises 4 times than life of silica brick furnace lid, firing tall aluminous brick (A12O380%~85%) does not burn Zuo aluminous brick with what phosphate is united in wedlock (A12O380%〜85%) and firing Mo Laishi brick or do not burn phosphate to combine Mo Laishi brick, their general character is heatproof shake sex admirable. The life of the furnace lid at the beginning of 60 time already amounted to 200 furnace left and right sides.
Furnace lid of electric stove of 85tUHP of French SAULVE steelworks is used general tall aluminous brick (A12O375% controls) , average service life 150. 130t electric stove is 133 furnace, in be being used to 90 furnace left and right sides to need to stop furnace, repair, every tons of steel is fireproof 2.75kg of bad news of bill of material. Electrode Kong Zhuanze is joined in aggregate of tall aluminous alumina make an appointment with service life to come 254 furnace above, fireproof bill of material bad news every tons of steel falls to 1.0kg the following.
Japanese report furnace lid uses tall aluminous brick generally, in electrode aperture and week of smoke evacuation aperture serious place uses the caustic that surround frit high pure what alumina is main raw material is firing tall aluminous brick. Or the part is used fight erode, be able to bear or endure those who flake do not bake bricks, this brick joins right amount CrO3 and have high strenth and be able to bear or endure erode performance. In addition, using water-cooling furnace lid all around use what do not burn tall aluminous brick to be in the majority, be able to bear or endure the trend that uses magnesian chromium not to bake bricks decreases.
(3) macerate furnace lid. Brick of furnace lid of 70 time Japan uses 20 centuries macerate craft improves function of high aluminous products to obtain favorable result. Use the oxide such as MgO, Cr2O3, CaO, SiO2 to make macerate agent dip come matrix is made up for in goods hole easy by the blemish of frit corrode, raise its in order to improve goods composition durable sex. Use Cr2O3 can reduce content of low be in harmony to be opposite for macerate agent of furnace lid brick invade, raise the denaturation that fight squirm can. The high temperature intensity of the corundum brick of classics Cr2O3 macerate raises one times above, the deflection below high temperature is reduced 35% .
(4) alkalescent furnace lid. Electric furnace lid uses magnesian qualitative brick. Reduce magnesia brick to be out of shape to make sure the stability of furnace lid structure is mixed reach flake, use iron sheet magnesia brick or iron is inserted when build by laying bricks or stones is built piece. Because iron sheet generation is faradic (high power electric stove is built blame very) , form local overheat to convert non-magnetic steel makes bricky case. The linear expansion coefficient of pure magnesia brick is too big on the other hand, dosage is not much.
If other and alkalescent brick is magnesian chromic qualitative, chromic magnesium qualitative, dolomite magnalium is qualitative, qualitative wait to be used in succession, have high temperature firing brick or do not bake bricks, or the dolomite brick of classics tar macerate. They have admirable fireproof sex to be able to be mixed fight ferric oxide and erode ability slaggily, below slashing condition, brick of tall aluminium of performance characteristics excel. But because density of alkalescent brick bulk is high, furnace lid is heavy (heavier than silica brick 50% , weigh 30%) than tall aluminous brick, for this, improve the construction method of furnace lid structure, use different capable person to pledge integrated build by laying bricks or stones builds what build in order to raise electric stove to use the effect.
(5) integrated furnace lid. Company of Japanese steel tube ever used tall aluminous brick and alkalescent brick in 30t report furnace lid when integrated build by laying bricks or stones is built, life achieves 200~300 furnace, fireproof material 2~3kg of only waste time of every tons of steel.
When advocate when face of furnace lid water-cooling achieves 70%~80% , furnace life amounts to another company of 300 furnace; to use 16 water-cooling board on the outer shroud of furnace lid of 40t electric stove, chemically of small furnace lid combines build by laying bricks or stones of magnesian chromic brick to build, pledge with tall aluminium all round electrode aperture fireproof pound dozen of makings, its furnace life raises 600 furnace left and right sides by 190 furnace.
3 prefab a furnace lid
One of defect of furnace lid of bricky build by laying bricks or stones are to shaping dimension public errand of the brick asks extremely severe. In electrode of furnace lid center Kong Zhou is surrounded after furnace lid complete water-cooling used prefab piece. Use prefab piece is comparing an advantage with bricklaying photograph: ?
Germany uses to furnace lid prefab an improvement that undertook many sided:
(1) structure designs: It is the mechanical property that has acquired, the choice is annular with the triangle prefab piece. Will prefab a circle of instead of the horn side, in order to raise pair of adaptability that expand and contract. Prefab place of the 2-5 that be like a graph shows an external form.
(2) material chooses character: General furnace lid is prefab piece corrode caustic, main because of horizontal crackle, permeate the desquamation with compact layer be caused by, tall aluminium is qualitative prefab a porosity is taller easily corrode caustic. Use corundum to pledge prefab piece, its organization is compact, porosity is low, permeability is small, intensity Zuo , heatproof shake sex is good, can improve use result.
(3) build by laying bricks or stones builds construction: In prefab a space between and sidewall and prefab the area uses a triangle between with prefab piece what pledge with material is fireproof pound dozen of makings to fill up;2) is compensation prefab piece between and between water-cooling area expand, used fireproof fiber blanket.
Use number of prefab furnace lid rises by the 150 furnace of line of former traditional brick to 160 furnace. The sexual visibility that electric furnace lid pledges with of all kinds material expresses 2-7.
Electric stove of power of freeboard of company of estate of Japanese Osaka kiln is used formerly pound dozen of makings (A12O3>85% , siO29% , p2O33.4%) and the port that the brick comprises cover average service life 453 furnace, convert high strenth is pouring makings (A12O3>85% , caO0.8% , siO29%) is prefab piece service life carries Zuo to come by 506 furnace stage by stage 1029 furnace.
After with electric stove of 80tUHP of song hill steelworks the lid realizes water-cooling to change, whole furnace lid is used completely prefab piece make, trigonometry area uses 3 corundum - Molaishi is prefab piece, electric polar circle is 10 magnalium needle spar is prefab piece. Small furnace lid is the loose tool that has makinging beforehand aspirant travel, install pave electrode aperture with mud first, receive to central ring from the brim next - annulus build by laying bricks or stones, mix in trigonometry area after fill pledges into corundum all round electrode aperture pouring conserve of the classics after makings drawing of patterns reserves. Prefab piece furnace lid life already amounted to 600 furnace, ton steel is fireproof material falls to 0.4kg.
4 whole are pouring furnace lid
Use whole pouring what furnace lid promoted furnace lid life is farther rise. England abandons Field (electric stove of SMACC) steelworks 130tUHP is furnace lid of build by laying bricks or stones of tall aluminous brick formerly, average service life 133 furnace. After furnace lid water-cooling, water-cooling also is executed all round electrode, go up character from material choose the tall aluminium that contains Cr2O33% to exceed low cement pouring expect and add stainless steel fiber, furnace lid is in have a bit 594 heat were used below the circumstance that repair, life raises about 4 times.
Furnace lid of report of 5 our country uses fireproof data
At the beginning of 50 time, furnace lid of our country report uses silicon of chunk spy abnormity to combine a brick character, build by laying bricks or stones builds convenient, rigor, stress of whole furnace lid distributings relatively all . But it is more difficult that this kind of brick shapes, and the need that because silica brick is hard to get used to aggrandizement smelt,works, use no longer gradually later. Our country early research uses Zuo aluminium to pledge electric stove builds a brick, the Zuo aluminous brick that by Tang Gang fireproof factory produces is used on electric stove of the 15t that stroke steel achieve 150〜200 furnace. Developed all sorts of bond in succession later (water glass, phosphoric acid, phosphoric acid 2 hydrogen aluminium) of preparation do not burn Zuo aluminous brick, or silicon line introduces in burden stone a group of things with common features is mineral raw material, add small pink, pointed spar, carborundum to wait, developed again in recent years of all kinds and fireproof pouring makings, in order to satisfy the need that freeboard power electric stove admits.
(Furnace lid of brick of 1) tall aluminium. Aluminium of our country Zuo is aluminous resourceful, breed is all ready, offerred advantage to develop advanced tall aluminous qualitative fireproof material. DK water aluminous stone was used with respect to development in 50 time metaphase - kaolinite, grog of I class alumina (Al2O3>80%) is base the tall aluminous brick of makings, this brick chooses constituent structure all , foreign matter is little, agglomeration is good (the aluminous grog of bulk density 3.1〜3.2g/cm3) is raw material, good with plasticity clay makes bond, control grog fine pink (the affiliation of <0.088mrn>90%) is measured (40%〜50%) , be in with amortize base substrate firing the volume that reaction place turns to cause because of 2 Molaishi in the process expands, avoid goods construction inattentive. Fireproof factory produced Tang Gang 1987 the Zuo aluminous brick of Al2O3>85% , 193 heat were used successfully in electric stove of dance copper 75t, fireproof material 1.34kg of only waste time of every tons of steel. Advocate what brilliant photograph is corundum is firing tall aluminous brick, use at furnace lid of freeboard power cable, service life about 150 furnace, lid of electric stove of Guangzhou steelworks 40tUHP uses water-cooling port lid to use 1 wait for life of tall aluminous brick to amount to 300~400 furnace. Firing 85% , siO29% , p2O33.4%) and the port that the brick comprises cover average service life 453 furnace, convert high strenth is pouring makings (A12O3>85% , caO0.8% , siO29%) is prefab piece service life carries Zuo to come by 506 furnace stage by stage 1029 furnace.
After with electric stove of 80tUHP of song hill steelworks the lid realizes water-cooling to change, whole furnace lid is used completely prefab piece make, trigonometry area uses 3 corundum - Molaishi is prefab piece, electric polar circle is 10 magnalium needle spar is prefab piece. Small furnace lid is the loose tool that has makinging beforehand aspirant travel, install pave electrode aperture with mud first, receive to central ring from the brim next - annulus build by laying bricks or stones, mix in trigonometry area after fill pledges into corundum all round electrode aperture pouring conserve of the classics after makings drawing of patterns reserves. Prefab piece furnace lid life already amounted to 600 furnace, ton steel is fireproof material falls to 0.4kg.
4 whole are pouring furnace lid
Use whole pouring what furnace lid promoted furnace lid life is farther rise. England abandons Field (electric stove of SMACC) steelworks 130tUHP is furnace lid of build by laying bricks or stones of tall aluminous brick formerly, average service life 133 furnace. After furnace lid water-cooling, water-cooling also is executed all round electrode, go up character from material choose the tall aluminium that contains Cr2O33% to exceed low cement pouring expect and add stainless steel fiber, furnace lid is in have a bit 594 heat were used below the circumstance that repair, life raises about 4 times.
Furnace lid of report of 5 our country uses fireproof data
At the beginning of 50 time, furnace lid of our country report uses silicon of chunk spy abnormity to combine a brick character, build by laying bricks or stones builds convenient, rigor, stress of whole furnace lid distributings relatively all . But it is more difficult that this kind of brick shapes, and the need that because silica brick is hard to get used to aggrandizement smelt,works, use no longer gradually later. Our country early research uses Zuo aluminium to pledge electric stove builds a brick, the Zuo aluminous brick that by Tang Gang fireproof factory produces is used on electric stove of the 15t that stroke steel achieve 150〜200 furnace. Developed all sorts of bond in succession later (water glass, phosphoric acid, phosphoric acid 2 hydrogen aluminium) of preparation do not burn Zuo aluminous brick, or silicon line introduces in burden stone a group of things with common features is mineral raw material, add small pink, pointed spar, carborundum to wait, developed again in recent years of all kinds and fireproof pouring makings, in order to satisfy the need that freeboard power electric stove admits.
(Furnace lid of brick of 1) tall aluminium. Aluminium of our country Zuo is aluminous resourceful, breed is all ready, offerred advantage to develop advanced tall aluminous qualitative fireproof material. DK water aluminous stone was used with respect to development in 50 time metaphase - kaolinite, grog of I class alumina (Al2O3>80%) is base the tall aluminous brick of makings, this brick chooses constituent structure all , foreign matter is little, agglomeration is good (the aluminous grog of bulk density 3.1〜3.2g/cm3) is raw material, good with plasticity clay makes bond, control grog fine pink (the affiliation of <0.088mrn>90%) is measured (40%〜50%) , be in with amortize base substrate firing the volume that reaction place turns to cause because of 2 Molaishi in the process expands, avoid goods construction inattentive. Fireproof factory produced Tang Gang 1987 the Zuo aluminous brick of Al2O3>85% , 193 heat were used successfully in electric stove of dance copper 75t, fireproof material 1.34kg of only waste time of every tons of steel. Advocate what brilliant photograph is corundum is firing tall aluminous brick, use at furnace lid of freeboard power cable, service life about 150 furnace, lid of electric stove of Guangzhou steelworks 40tUHP uses water-cooling port lid to use 1 wait for life of tall aluminous brick to amount to 300~400 furnace. Firing 85% , caO0.8% , siO29%) is prefab piece service life carries Zuo to come by 506 furnace stage by stage 1029 furnace.
After with electric stove of 80tUHP of song hill steelworks the lid realizes water-cooling to change, whole furnace lid is used completely prefab piece make, trigonometry area uses 3 corundum - Molaishi is prefab piece, electric polar circle is 10 magnalium needle spar is prefab piece. Small furnace lid is the loose tool that has makinging beforehand aspirant travel, install pave electrode aperture with mud first, receive to central ring from the brim next - annulus build by laying bricks or stones, mix in trigonometry area after fill pledges into corundum all round electrode aperture pouring conserve of the classics after makings drawing of patterns reserves. Prefab piece furnace lid life already amounted to 600 furnace, ton steel is fireproof material falls to 0.4kg.
4 whole are pouring furnace lid
Use whole pouring what furnace lid promoted furnace lid life is farther rise. England abandons Field (electric stove of SMACC) steelworks 130tUHP is furnace lid of build by laying bricks or stones of tall aluminous brick formerly, average service life 133 furnace. After furnace lid water-cooling, water-cooling also is executed all round electrode, go up character from material choose the tall aluminium that contains Cr2O33% to exceed low cement pouring expect and add stainless steel fiber, furnace lid is in have a bit 594 heat were used below the circumstance that repair, life raises about 4 times.
Furnace lid of report of 5 our country uses fireproof data
At the beginning of 50 time, furnace lid of our country report uses silicon of chunk spy abnormity to combine a brick character, build by laying bricks or stones builds convenient, rigor, stress of whole furnace lid distributings relatively all . But it is more difficult that this kind of brick shapes, and the need that because silica brick is hard to get used to aggrandizement smelt,works, use no longer gradually later. Our country early research uses Zuo aluminium to pledge electric stove builds a brick, the Zuo aluminous brick that by Tang Gang fireproof factory produces is used on electric stove of the 15t that stroke steel achieve 150〜200 furnace. Developed all sorts of bond in succession later (water glass, phosphoric acid, phosphoric acid 2 hydrogen aluminium) of preparation do not burn Zuo aluminous brick, or silicon line introduces in burden stone a group of things with common features is mineral raw material, add small pink, pointed spar, carborundum to wait, developed again in recent years of all kinds and fireproof pouring makings, in order to satisfy the need that freeboard power electric stove admits.
(Furnace lid of brick of 1) tall aluminium. Aluminium of our country Zuo is aluminous resourceful, breed is all ready, offerred advantage to develop advanced tall aluminous qualitative fireproof material. DK water aluminous stone was used with respect to development in 50 time metaphase - kaolinite, grog of I class alumina (Al2O3>80%) is base the tall aluminous brick of makings, this brick chooses constituent structure all , foreign matter is little, agglomeration is good (the aluminous grog of bulk density 3.1〜3.2g/cm3) is raw material, good with plasticity clay makes bond, control grog fine pink (the affiliation of <0.088mrn>90%) is measured (40%〜50%) , be in with amortize base substrate firing the volume that reaction place turns to cause because of 2 Molaishi in the process expands, avoid goods construction inattentive. Fireproof factory produced Tang Gang 1987 the Zuo aluminous brick of Al2O3>85% , 193 heat were used successfully in electric stove of dance copper 75t, fireproof material 1.34kg of only waste time of every tons of steel. Advocate what brilliant photograph is corundum is firing tall aluminous brick, use at furnace lid of freeboard power cable, service life about 150 furnace, lid of electric stove of Guangzhou steelworks 40tUHP uses water-cooling port lid to use 1 wait for life of tall aluminous brick to amount to 300~400 furnace. Firing 80%) is base the tall aluminous brick of makings, this brick chooses constituent structure all , foreign matter is little, agglomeration is good (the aluminous grog of bulk density 3.1〜3.2g/cm3) is raw material, good with plasticity clay makes bond, control grog fine pink (the affiliation of <0.088mrn>90%) is measured (40%〜50%) , be in with amortize base substrate firing the volume that reaction place turns to cause because of 2 Molaishi in the process expands, avoid goods construction inattentive. Fireproof factory produced Tang Gang 1987 the Zuo aluminous brick of Al2O3>85% , 193 heat were used successfully in electric stove of dance copper 75t, fireproof material 1.34kg of only waste time of every tons of steel. Advocate what brilliant photograph is corundum is firing tall aluminous brick, use at furnace lid of freeboard power cable, service life about 150 furnace, lid of electric stove of Guangzhou steelworks 40tUHP uses water-cooling port lid to use 1 wait for life of tall aluminous brick to amount to 300~400 furnace. Firing the affiliation of 90%) is measured (40%〜50%) , be in with amortize base substrate firing the volume that reaction place turns to cause because of 2 Molaishi in the process expands, avoid goods construction inattentive. Fireproof factory produced Tang Gang 1987 the Zuo aluminous brick of Al2O3>85% , 193 heat were used successfully in electric stove of dance copper 75t, fireproof material 1.34kg of only waste time of every tons of steel. Advocate what brilliant photograph is corundum is firing tall aluminous brick, use at furnace lid of freeboard power cable, service life about 150 furnace, lid of electric stove of Guangzhou steelworks 40tUHP uses water-cooling port lid to use 1 wait for life of tall aluminous brick to amount to 300~400 furnace. Firing the Zuo aluminous brick of 85% , 193 heat were used successfully in electric stove of dance copper 75t, fireproof material 1.34kg of only waste time of every tons of steel. Advocate what brilliant photograph is corundum is firing tall aluminous brick, use at furnace lid of freeboard power cable, service life about 150 furnace, lid of electric stove of Guangzhou steelworks 40tUHP uses water-cooling port lid to use 1 wait for life of tall aluminous brick to amount to 300~400 furnace. Firing tall aluminous firebrick manages the visibility that turn a sex expresses 2-11.
Brick of the incomplete after be being used to furnace lid the analysis of microstructure, make clear this brick mar mechanism to erode and pare for chemistry piece. Splash the slag to furnace lid (bases is mixed for CaO and FeO) filling charging and furnace wall magnesium are qualitative the fuse of fireproof material and volatilizing MgO alkaline a constituent and tall aluminium brick produce chemical reaction, produce chemistry to erode. Furnace lid brick suffers the chemistry below high temperature to erode action, form the slaggy, layer that permeates layer and former brick layer to take a structure, below condition of periodic temperature violent change, permeating transverse crackle is formed between layer and former brick layer until pare piece, pare a ply can achieve 50〜100mm; to also be in less sometimes 10〜30mm, those who happen in phase of furnace battle initial stage pare piece, sometimes thicker, area also bigger. Prevent to flake and rise fighting aggressivity is the key that defers firebrick to mar.
(2) contains “ the furnace lid brick of 3 stone. 3 stone include silicon line stone, cyanite, andalusite, belong to silicon line stone a group of things with common features is mineral, for coessential abnormity body. Its theory composition is A12O363.l% , SiO236.9% , chemical structural formula to be A12O3.SiO2 or Al2SiO3. Because build condition and structure,different expression matchs a discrepancy that go up in cation, make manage changes function to already general character has a difference again, 3 kinds of mineral raw material all belong to tall aluminium mineral, have the property with Zuo mineral aluminium, but its uniqueness can not be place of common tall aluminous raw material have ^ again. The change that 3 stone of “ are heated to cannot be gone against to constant temperature is Mo Laishi crystal (show short structure of network of columnar, acerose, grow about 3 micron commonly, long can amount to 20 micron) , and separate out SiO2, heating in reaction process, accompany Molaishi to change cause bulk to expand, expand with cyanite among them rate for big, andalusite be placed in the middle.
Zhengzhou flourish fills what fireproof material serves as major to be able to bear or endure the product of fireproof heat preservation that material produces manufacturer to be able to produce more than 40 kinds of different types, product type basically is from sort and recipe scale undertakes distinguishing, line of the products is various, basically can satisfy show level boiler, what steel-making chamfer place needs is high temperature resistant requirement, product quality is worth your reliance. Www.glzcj.com  Http://www.zzrsbwz.com  13526667913 Yuan manager