1, silicon aluminium fastens firebrick, as we have learned, its should change systematic software phasor to be fundamental foundation theory with AL2O3—SiO2 n duality, include following a few kinds.
(One) silica brick, point to the firebrick that contains SiO293% left and right sides namely, the key that is firebrick of soda acid sex is phyletic. It applies to communication of wall of build by laying bricks or stones, also in order to is various the vault of the adiabatic kiln furnace of furnace of to calcine of factory of element of sandwich glass, china, carbon, firebrick and position of other carring capacity, also use in the position of tall carring capacity of hot-blast stove, but do not suit,be in 600 ℃ are following and is spent rise and fall the application in large adiabatic machine facility.
(2) argillaceous brick, argillaceous brick is crucial by Molaishi (photograph of 25% ～ 50%) , sandwich glass (25% ～ 60%) and calcite and calcite (achieve 30% ) be formed. It is raw material with good model clay commonly, beforehand calcination autumn expects, deserve to go up subsequently soft model clay, with working a way partly may model law figuration, is spent in handicraft of brick of clay of fire of 1300 ～ 1400 C. The shirt-sleeve agent make it such as the siliceous natrium that still can add grain, concrete did not burn handicraft and adventitious raw material. This is the common firebrick in heating furnace of puddling blast furnace, hot-blast stove, hot-blast stove, driving force, limekiln, machinery, china and firebrick fire kiln.
(3) tall aluminous firebrick, the mineral compose of tall aluminous firebrick makes corundum, Molaishi and sandwich glass appearance, its water content depends on the type with more residual than reaching its AL2O3/ SiO2 and gross, the level that can develop firebrick by AL2O3 water content differentiates. Raw material is tall aluminous alumina and silicon line stone kind pure natural iron ore, also be mix into ferric oxide of corundum of the frit that enter report, to calcine, generate Molaishi, reach its to be pressed with ferric oxide and clay different occupy the cement grog that compares calcination. It wants to be made with agglomeration law production. But commodity also has brick of bead of dissolve clinker, frit, do not bake bricks and adventitious firebrick. Production of industry of industry of iron and steel of general in order to, rare metal and other industry produce tall aluminous firebrick.
(4) corundum firebrick, corundum brick points to AL2O3 water content namely not under 90% , this kind of firebrick with what corundum is crucial thing appearance, can divide into brick of brick of to calcine corundum and electric frit corundum.
2, firebrick of basic set product. Alkalescent firebrick points to the handicraft of fire prevention material that is crucial component like Mg0 and CaO with alkalescent oxide namely, crucial sort has following a few kinds.
(One) magnesian qualitative firebrick, show with magnesium stone makes raw material namely, with photograph of brilliant of dominant of square magnesian stone, mgO water content is in 80% ～ 85% right-and-left firebrick. Its commodity divides two kinds into metallurgical industry magnesia and magnesian qualitative handicraft. Form according to organic chemistry those who reach main use is different, have George brick of magnesia of arenaceous, general metallurgical industry, general magnesia brick, magnesian silica brick, magnalium, magnesian calcic brick, magnesian carbon brick and he is phyletic etc. Magnesian qualitative firebrick is the most crucial handicraft in alkalescent firebrick, fireproof degree tall, have first-rate repellency to basic slag and iron broken bits, it is this kind of crucial tall Ji firebrick. Apply to converter of wind furnace, Co2, heating furnace and rare metal smelt to wait.
(2) limestone brick, want to produce this kind of manufacturing alkalescent firebrick as crucial raw material with limestone. General in order to is alkalescent converter, still can serve as li of line of chastening bag outside a few furnace.
(3) magnesian olivine firebrick, want this kind of firebrick that forms as the key with magnesian olivine 2MgO·SiO2. Apply to wind furnace store brick of hot cell pane, ingot casting reachs his with hearth of brick, hot-blast stove also is pretty good application in refine copper furnace practical effect.
3, the firebrick that contain carbon. Contained carbolic firebrick points to namely by the chemical material make it of carbon or carbon, in order to contain different the firebrick handicraft that the carbon of appearance is crucial component, crucial component is become following a few kinds.
(One) carbolic brick, want to pledge with carbon raw material is crucial raw material, the heat-resisting neutral of make it of additive mixture of proper be in harmony changes firebrick handicraft. Carbolic brick is applied at hearth of blast furnace of puddling of wall of build by laying bricks or stones, crucible, bosh and shaft below. The abidance that can promote puddling blast furnace works between , increase operating period. Besides, carbolic brick is general still chemical industry of cable of in order to, chemical industry, crude oil chemical industry, eletroplate electric stove of industry of technology production trade, nonferrous metal (or li of line of machine equipment) , line of chamfer of acerbity fluid, lye and conduit, reach its smelt rare metal (wait like lead, aluminous, stannum) lining.
(2) high pure handicraft of material of black lead qualitative fire prevention, should with pure natural and high pure black lead is raw material, with clay the mixture that make fuse makes taken fireproof insulation material. This kind of handicraft has high pure crucible of black lead clay, retort, cast steel brick of the head that use stuff, water place brick and brick of line of Cheng Gang bucket. Amid production makes number most, apply wider is puddling and smelt rare metal is high pure crucible of black lead clay.
(3) handicraft of material of carborundum fire prevention, want with carborundum (the tall Ji that SiC) makes for raw material production is fireproof insulation material. Its wear-resisting function and be able to bear or endure corrode sex is good, tall compressive strength is great, coefficient of thermal conductivity is tall, hot coefficient of expansion is small, heat-resisting shake sex is strong. In level of rolled steel smeltery, it is usable wait for the level in order to fill mouth of tapping of chamfer of hearth of blast furnace of head of place of the line in steel tub, water, a place of strategic importance, puddling and bosh, taphole, converter and heating furnace, hot-blast stove without water-cooling slideway. In rare metal (zinc, copper, aluminium) in smeltery, tower of alembic of a lot of in order to, rectify procrastinates dish, pipeline of stuff of electrobath armpit horn, fused metal, suck send crucible of stuff of pump and smelt metal to wait. In production of aluminous silicate industry, its a lot of refractory slab that regard various kiln as furnace and the raw material that lie between blaze, wait like the line in muffle and saggar. In chemical industry, much in order to lights aerification of furnace of to calcine of litter of gas ultrasonic generator, organic chemistry, crude oil implement wait for the level with furnace of flue gas to decoke. Besides, rocket nozzle and leaf of turbine of tall natural gas can regard as to wait on dimensional technique.
4, the firebrick that contain zirconium. Vest in belongs to raw material of soda acid sex this kind, should with stone of pure natural zirconium arenaceous (ZrSiO2) makes extraction handicraft for raw material. Zirconium pledges firebrick has do not fasten firebrick and firebrick of contained carbolic series product at silicon aluminium, its fight broken bits sex strong, heat is out of shape rate is minor, coefficient of thermal conductivity rises along with what spends and decrease, load molten is spent tall, wear-resisting caustic compressive strength is great, heat-resisting shake sex is strong, had turned the key in industry of every industry production into raw material. Subsequently the development trend with the steel rolling in iron and steel industry and technical distill of vavuum pump decompression, of zirconium stone firebrick apply more and more general, the key has following a few kinds of classify.
(One) zirconium stone brick, in puddling whole process, choose magic art of tapping decompression distill, and zirconium stone makes fireproof insulation material be opposite slaggy, of molten steel be able to bear or endure adhere sex and heat-resisting shake sex are admirable, and suit to be in alleviate in the job below pressure, it is general in iron and steel industry distill of decompression of wall of build by laying bricks or stones of in order to uses the line in bucket flourishing steel, also serve as stainless steel board the line in bucket flourishing steel, brick of brick of mouth of the line in bucket of steel rolling Cheng Gang, casting, head of a place of strategic importance, sleeve brick reachs his lining of electric induction furnace of tall intermediate frequency. Zirconium stone makes firebrick have tall repellency to acerbity basic slag and sandwich glass, because this returns smelt of general in order to of the sandwich glass kiln of the most optimistic sandwich glass destroy the place badlier. Zirconium stone makes fireproof insulation material still be had not the character with metallic stuff aluminium, aluminous compound and slaggy penetration, because this is in,refine also got admirable actual result on aluminous hearth.
(2) brick of AZS report frit, the brick of corundum of zirconium of the frit that it is report that also says, subsequently the development trend that sandwich glass industry produces, the key place that brick of AZS report frit already turned vitreous kiln into furnace be sure to fireproof insulation material. It resists the adhere sex of sandwich glass fluid is stronger.
(3) AZS again brick of frit of to calcine report, apply to wall of build by laying bricks or stones the bottom of kiln of sandwich glass pool, wall and store the adiabatic machine equipment such as hot check brick.
(4) zirconium not comes Shi Dianrong brick, the character of this kind of brick is molecular structure high density, load molten is spent tall, heat-resisting shake sex is strong, the concussion below tall is reached below normal temperature tenacity is tall, wear-resisting performance is good, coefficient of thermal conductivity is good, and have resist high gradely slaggy cankerous working ability. The main use range of this kind of handicraft is wide, of furnace of hot-blast stove of metallurgical industry of in order to, soaking, calcium carbide furnace present makings opening, wall of kiln of kiln of sandwich glass frit, application is actual the effect is first-rate.
5, firebrick of adiabatic heat preservation. Show hole leads tall, cubage namely opposite density the fireproof insulation material with low, low coefficient of thermal conductivity. Adiabatic heat preservation is fireproof insulation material another namer pledges gently concrete is fireproof insulation material. It is included following a few kinds of classify.
(One) tall aluminous adiabatic heat preservation pledges gently concrete firebrick. Should be crucial AL2O3 water content not to pledge gently under the adiabatic heat preservation of 48% with aluminous alumina concrete firebrick. Its produce technological process to choose expanded plastics magic art, also can choose accretion of burn oneself out law. Tall aluminium makes adiabatic heat preservation pledge concrete firebrick can be used gently mix with thermal insulation board of wall of build by laying bricks or stones without apparently tall fused raw material is corroded reach the place that erodes effect. Instantly with flame lay a finger on when, normally the of surface layer lay a finger on that tall aluminium makes firebrick of adiabatic heat preservation is spent cannot cross 1350 ℃ high. Firebrick of heat preservation of Mo Laishi qualitative heat insolation but instantly flame of lay a finger on, have heat-resisting, compressive strength is high, environmental protection is energy-saving effect is distinct wait for character. Li of line of kiln of path of roller of furnace of applicable hot splitting decomposition, hot-blast stove, china, food cabinet kiln and various resistor furnace.
(2) sticky earthy and adiabatic heat preservation pledges gently concrete firebrick, the AL2O3 water content that should be make it of crucial raw material with saggar is 30% ～ the firebrick of adiabatic heat preservation of 48% . Its produce technological process to choose burn oneself out to impose part way and expanded plastics standard. With saggar, float bead, saggar cement grog makes raw material, mix into is mixed into shirt-sleeve agent curium wood chip, via condiment, mix up, figuration, dry impetuous, fire, make take cubage to be relative to density 0. 3 ～ 1. The commodity of 5g/cm3. The output of sticky earthy and adiabatic brick occupies the one most of total production value of firebrick of adiabatic heat preservation to control.
Chinese standard (GB 3994—1983) pledges clay adiabatic brick presses cubage be divided into NG—1.5, NG—1.3a, NG—1.3b, NG—1.0, NG—0.9, NG—0.8, NG—0.7, NG—0.6, NG—0.5, NG—0.4 10 to plant relative to density steel grade.
(3) heat preservation of coating heat insolation pledges gently concrete firebrick, the handicraft of material of fire prevention of adiabatic heat preservation that should be make it of crucial raw material with coating. Its key is used in the thermal insulation board with 900 following ℃ .
Chinese standard (GB 3996—1983) presses handicraft of heat preservation of coating heat insolation cubage be divided into GG—0.7a, GG—0 relative to density. 7b, GG—0.6, GG—0. 5a, GG—0.5b and GG—0.46 are planted steel grade.
(4) bleach bead brick, be in order to float bead the adiabatic and fireproof product that makes for main raw material. Float bead it is the siliceous aluminium that singles out from the float in fly ash of heat and power plant qualitative glass is hollow bead body. Its body light, wall thin, hollow, surface smooth, high temperature resistant, heat proof quality is good. Use float bead these good character, can make the light qualitative adiabatic and fireproof material with a heat preservation superior performance. Production bleachs bead brick to be able to use half dry process.
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