Brick of corundum of light qualitative Mo Laishi and light qualitative tall aluminous brick which good?

Heat preservation brick is OK heat preservation is adiabatic, managing the sources of energy, the light qualitative brick that gives priority to with alumina has: Brick of corundum of light qualitative Mo Laishi and light qualitative tall aluminous brick, effect of heat preservation of these two products which good? Understand below first, say which product is good again next.


Light qualitative tall aluminous brick also calls tall aluminous heat preservation the brick. Alumina quantity is more than 48% , the light qualitative fireproof material that basically constitutes by Molaishi and vitreous photograph or corundum. Cubage density 0.4? 1. Is 35g/cm3 space led 66% ? Seven, compressive strength? 8 digit. Heat-resisting shake sex is better; Mix with tall aluminous aluminous grog commonly a few clay, bleb law or bubble method are used after classics mill with slop form pouring, via 1300? Temperature is 1500 ℃ . 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 ℃ . Light qualitative tall aluminous brick is given priority to with grog of tall aluminous alumina commonly want raw material, add a few clay and binder, deserve to compare by certain proportion, through mixing refine, epispastic or the method such as aeriform generation, pouring in light qualitative tall aluminous aluminous slop shape, dry hind drawing of patterns, high temperature fire. The important segment in pledging tall aluminous brick produces a course gently is burden is mixed epispastic, want to come to those who control raw material deserve to compare according to design recipe first, want to notice epispastic craft next, make epispastic stoma even, facilitate after pledging tall aluminous brick is produced gently, be used.
Applied specification pledges tall aluminous brick uses as commonly gently heat preservation brick, not with slaggy or melt content is direct contact. High quality light qualitative tall aluminous qualitative brick and fuse-element contact temperature do not exceed 1350 ℃ . Specific the use of light qualitative tall aluminous brick should ask to undertake formulary by technology design. 2 it is intensity of press press of light qualitative tall aluminous brick poorer, do not bear consequently greater pressure, avoided bricky body craze. When build by laying bricks or stones builds qualitative brick of light qualitative tall aluminium, cooperate to use with light qualitative mud. When storing, want to had done moistureproof, waterproof processing.


Brick of corundum of light qualitative Mo Laishi tastes bases to be alumina originally, advocate brilliant photograph is Mo Laishi photograph and corundum brilliant photograph, have stronger fight flake ability. Cubage density is 1.5-1.7g/cm3, basically use at liner of kiln of high temperature channel, drawer kiln, high use temperature can amount to 1700 ℃ , cubage density is 1.5-1.7g/cm3.
Raw material is raw material with high-grade corundum, join partial α - clay of low iron of Al2O3 and tall plasticity, partial Mo Laishi arises below high temperature, give priority to brilliant photograph with corundum photograph, mo Laishi is united in wedlock, with Lan Jing stone a group of things with common features is expander, make goods fire rear body accumulates stability, but model shapes. The corundum Mo Laishi that lights law production with feed in raw material pledges the brick is the one part that waits for ball of wood chip, polystyrene, coke combustible gently in adding burden, firing the meeting after combustible burns produces air hole, reduce bulk density of the brick thereby, can make the light qualitative brick with bulk density inferior requirement with this kind of method. Be used add light content to be wood chip and polystyrene ball, 1mm of wood chip classics filters, without foreign matter; 2~0.5mm of diameter of polystyrene ball bead, exterior whiteness, grain is even. Light qualitative corundum not comes of stone brick shape and fire.
Modelling corundum - Molaishi pledges the brick basically uses extruding slop to shape gently. The recipe of this product needs to experiment repeatedly. In producing a course, try to squeeze first give an adobe, undertake to bad brick bulk density detects, be measured according to scorching next and scorch quantity, computation gives the bulk density of finished product brick, this method detects for adobe bulk density law. Examine production can be thrown after bulk density is eligible, if examine system is secret unqualified answer in time grind, add tinderbox or mixed powder, qualification hind can continue to produce. After using this method to detect, percent of pass of adobe body density is tall, density of finished product bulk accords with a requirement. Course 50~60 ℃ is dry, 24h again dry 48~72h of classics 100~110 ℃ , dry hind ≤ of moisture of adobe center remain 2.0% .
Firing fire of shuttle type kiln is used after adobe drying. Adobe undertakes be grindinged beforehand first before outfit, the basis is firing the adobe of old young general of shrinkage lowers dimension, can decrease disappear quantity is ground after burning, managing raw material, increase loading of kiln. Side is used to act a way when loading of kiln, of the combustible in be helpful for combustion process eliminate, the adobe when loading of kiln is arranged even, igneous method is uniform. Fire temperature is 1600 ± 10 ℃ , 8h heat preservation. The following should notice in fire process: Be in firing before, especially the combustion phase that the period of 300~600 ℃ is combustible, need is slow warm up, with benefit at combustible discharge, can make combustible produces carbonization otherwise, brick as black.
Heat preservation phase, the time that must provide by the curve has thermal insulation, the difference in temperature when heat preservation is lesser, because the heat preservation effect of light qualitative brick is good, easy generation slants lukewarm, assure each temperature dot to just begin heat preservation inside limits of heat preservation temperature. Put cold level, put cold speed to must not pass fast, cause brick blast easily to crack otherwise.
Cold working. The barren base after fire can differ by requirement wear the brick of shape size, grind the brick after making appearance orderly, size is exact. The corundum Mo Laishi that uses this method production pledges gently adiabatic brick, can make an appearance the special shaped brick that complex, form makes each surprise, make sure its dimension essence is accurate. produces corundum Mo Laishi light brick undertakes exterior quality inspection and manage change function to detect, view is bright and clean outside its, edges and corners is trenchant, size is exact.
Brick of corundum of light qualitative Mo Laishi and light qualitative tall aluminous brick which good? The price of two kinds of products differs with use temperature, which product is good? Basically see operating mode use a requirement, 1300 degrees or so with light qualitative tall aluminous brick, 1700 degrees or so with brick of corundum of light qualitative Mo Laishi.
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