Bleach bead brick to use float bead the thermal insulation that produces for main raw material is fireproof goods. 20 centuries at the beginning of 70 time, china begins to use float bead firebrick of heat insolation of manufacturing clay sex. Since 80 time, because manufacturing technology is simple, resourceful, product quality is better, use poriferous grog method more or burn dry add bleach bead law production to bleach bead brick. Fly ash of heat and power plant floats bead it is the hollow sphere that pledges with siliceous aluminium vitreous floatation gets. Its system is small, the wall is thin, hollow, the surface is slick, high temperature resistant, heat preservation performance is good. Use float bead these character, production gives the fireproof stuff that has property of admirable heat preservation. Production of half dry method bleachs bead brick to be able to be used at production. Craft of this figuration method is simple, need not working procedure of finished product figuration.
Bleach bead brick to be used at cement rotary kiln, temperature of appearance of its kiln substance can reduce 100 ℃ , use at the heat treatment of mechanical industry, but managing the specific power consumption of 30% . Bleach bead brick to also can be used make the energy-saving product such as vitreous frit kiln, kiln pouring blaze, channel kiln. Use heat of box type resistor, rate of integrated section report can be amounted to 54% . Although have industry standard, china produces bleach bead brick to still do not have GJ standard. The name that every enterprise uses, code name is different also, according to the bulk density of the product cent is, be like PG-0.9, PG-0.7, PG-0.5. The model of the product, appearance and dimension all press demand of firebrick of heat insolation of GJ standard clay. Bleaching a ball is the glass of hollow aluminium silicon that comes out by the floatation in fly ash of heat and power plant bead body, because of can float gets a name at surface. Its bases is Al2O3(quality mark is 28%~35%) and Si02, its are fireproof degree fluctuant inside 1610~1700 ℃ limits. Float bead light, the wall is thin, hollow, the surface is slick, high temperature resistant, heat preservation performance is good. Using what binder and sophisticate chaste tree become via 1100 ℃ fire to bleach bead brick is binder and classics of sophisticate chaste tree are added in bleaching bead pink. It still belongs to light qualitative firebrick.
Float bead pull current Cheng and technical production bleach bead brick to use half dry process more, its craft is as follows: Bleach a ball dry (except iron) → of batch mixing of → burden → expects → shapes tiredly choose of → of fire of → dry → is packed. Making when bleaching bead brick recipe, want a basis to float bead technical index, float certainly bead the dosage with bond, should notice to give birth to makings and grog at the same time the scale in the recipe. As the change that bleachs bead content to change character, its dosage and sort should be adjusted in time. Still can use introduce the method that burns light aggregate of lost property or other to have burden, in order to adjust the bulk density of the product, raise the performance characteristics of the product. If goal form is added to burn lost property in the recipe, can reduce the proportion of the product not only, still can make the heavy change burning a line of the product and hot conductibility are improved. Form 2 listed of all sorts of mark products bleach bead quantity.
Mix practice to work partly when shaping, appropriate uses puissant agitate blender. With respect to to makings order character, usually, bond and water should be in float bead mix with other stock after ticking off, join, in order to make sure mixture is even. Work partly when shaping, the control of dry mixture time of stock is in 3~4min, 5min is wet it is advisable to mix. After mixing, the water portion when material shapes should be between 13~20% , in producing a course, still answer to ask to be adjusted appropriately according to seasonal change and products index. Tired makings is normally after doing a law to mix practice partly, a few raw material achieve moisture hard inside short time even. If immediately figuration, base substrate is out of shape very easily, affect product quality thereby. Slop agglutinate time is 8 hours commonly, during agglutinate slop surface should avoid as far as possible dry. It is OK also that pug sticks bead mediumly by sufficient hydrolyze, pug plasticity rises, facilitate shape. Shape float bead for vitreous shape, the surface is slick, the stock after shaping moves easily, what need pressure lesser, with 15~30t static it is advisable to press. Some blemish often appear when shape, answer to be handled in time right now, prevent rejected product to enter below one process. For example: Can besmear on the mould when occurrence sticking to mould some of one alumina fine pink, appear pressurization can be used 2 times when removing a layer or static the method that add is solved. Additional, common flaw has burn lost property, accretion produces a layer because of spring back to crack, can add stock moisture content appropriately right now.
Dry float bead air brick base substrate is petty and graininess structure, water divides easier eduction, use half dry process, the moisture content inside base substrate is not high, can use fast and dry, improve manufacturing efficiency. Of semifinished product dry can use oven or channel type desiccator. The quantity of heat that dryer needs furnishs by the tail gas of kiln furnace eduction. When use channel desiccator, should make air and base substrate flow reversely, make stability of base substrate temperature rises, in order to hold base substrate construction compact. If use hothouse dry, base substrate should side is put at base board on, should stay between each other have space, flow of desiccate dry medium is smooth, water divides rapid eduction, dry medium temperature does not exceed 150 ℃ , do not exceed 4% when base substrate moisture content, can enter kiln fire. But prevent base substrate even excessive and dry, because hair of experience of excessive and dry base is fragile, go against carry. 6, fire and fire are to bleach key of pilot of bead brick quality. Those who bleach bead brick is firing temperature depends on float bead raw material of mineral composition etc, be like firing temperature is too low, criterion adobe agglomeration is undesirable, firing temperature is exorbitant, criterion adobe is contractive and excessive, affect the performance characteristics of the product thereby. Control of common fire temperature is in ℃ of 1200 ℃ ~1290, 2~4 hour heat preservation. Besides strict firing outside the system, still should notice firing the method assembling a car in the process, can bring about many product quality to drop otherwise. The structural characteristic that bleachs bead brick gently character is close by incomputable stoma and become, the effect that accordingly its thermal conductance suffers temperature to change is not big. The bulk stability that bleachs bead brick under 1000 ℃ is better. Because its intensity is high, can use at be being contacted with the village inside blaze directly. Bleach bead brick gently to be in character mechanical intensity, high temperature resistant the firebrick of heat preservation of respect excel other such as function, heat conduction function.
Tall aluminous qualitative light qualitative brick pledges tall aluminium pledges the brick calls tall aluminous qualitative heat preservation the brick again gently. Alumina quantity is more than 48% , the light qualitative fireproof material that basically constitutes by Molaishi and vitreous photograph or corundum. Cubage density is 0.4~1.35g/m3. Space leads 66%~73% , compressive strength is 1~8MPa. Heat-resisting shake sex is better;
Tall aluminous light qualitative brick is the heat-insulating material of important heat preservation of furnace of hot project kiln, logical choice pledges the production of tall aluminous brick is mixed gently use craft, to reasonable use the sources of energy, carry out policy of national energy resources correctly to have important sense. In brick of of all kinds light qualitative heat insolation, light qualitative tall aluminous brick is fireproof the gender is good, unit weight is little, raw material is rich, firebrick price is low, it is better heat-insulating material. According to producing a process to differ? Light qualitative tall aluminous brick can use bubble method or add sexual legal system to build.
Mix with tall aluminous aluminous grog commonly a few clay, via bleb law or bubble method are being used after mill, shape with slop form mould, classics 1300~1500 ℃ is firing. Occasionally, industrial alumina also can be used replace grog of partial Ji earth, with the liner that builds kiln furnace at build by laying bricks or stones and thermal insulation, and what do not get data of high temperature melt is strong the place that erode and erodes. When contacting blaze directly, temperature of watch surface contact should not exceed 1350 ℃ .
Float bead tall aluminous light qualitative brick distinguishs firebrick to be able to be informed these two kinds through above content is heat preservation brick together, material pledges and function and price differ.
Fireproof material occurrence craze, fall off, easy how to wear away to do? Want to solve a problem thoroughly, need to be dug from germ, the analysis gives real reason, flourish Cheng Naicai is engaged in be able to bear or endure service of timber production, research and development is old, can solve all sorts of difficulty problems of liner of furnace of high temperature kiln, welcome broad new old friend to seek advice reach technical communication.
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