How should be heavy qualitative firebrick and light qualitative firebrick chosen?

Blaze of contact of kiln furnace liner has the place that wear-resisting asks to choose heavy qualitative firebrick, the layer of heat preservation heat insulation that does not contact blaze uses light qualitative firebrick.
Weigh qualitative firebrickCommonly used at fireproof wear-resisting place, choose heavy qualitative data to give priority to the firebrick that agglomeration comes out. Its itself heft wants to weigh on a lot of times than light qualitative firebrick, not be for adiabatic heat preservation in the process that use, more important is for fireproof, wear-resisting, anti-corrosive wait, feel continuously with the blaze inside kiln furnace in using a process commonly feel, so heavy qualitative firebrick is had commonly taller high temperature resistant function.
Light qualitative firebrick is to regard as reduce heat energy to lose, have the fireproof data of effect of adiabatic, heat preservation, but not tall wearability needs strength, blaze of untouchability high temperature; When build by laying bricks or stones builds high temperature facility, can join real case according to demand, will light qualitative firebrick and according to of heavy qualitative firebrick devise plan, can raise equipment to apply life and nominal power of locomotive, both collaboration is applied, can attain ideal result.

Light qualitative firebrick shows density is less than 1.3 × commonly the firebrick of 103Kg/m3. Pledge gently, the quality that points out this kind of firebrick namely is light. Light qualitative firebrick has the following characteristic: 1, density is small, weight is light, can reduce weight of body of heater to simplify kiln furnace is tectonic; 2, porosity is tall, heat conduction rate is minor, heat preservation sex is good, can save specific fuel consumption, raise equipment to manufacture efficiency; 3, mechanical intensity is low, cannot use at bearinging structure; 4, wearability is poor, unfavorable use at be being contacted with charging, wear away serious place; 5, porosity is bigger, cannot use at direct contact slaggy with place of liquid state metal.
Heavy qualitative firebrick is namely in firebrick agglomeration craft the firebrick that gives priority to agglomeration to come out with a few heavy simple stuff. Its itself weight should weigh on a lot of times than light qualitative firebrick, not be for adiabatic heat preservation in the process that using, more important is for fireproof temperature, in using a process normally as direct as the blaze inside kiln furnace contact, so heavy qualitative firebrick has high temperature resistant effect normally. Choose saggar or mix into to add other and fireproof raw material, press multistage burden, shape via machine pressing, high temperature is firing. Light heat preservation of weight of light qualitative firebrick is adiabatic, but not tall wearability needs strength, cannot contact high temperature blaze; In weight of heavy qualitative firebrick, heat preservation lies between heat energy force to differ, but intensity tall wearability is big, high temperature resistant. When build by laying bricks or stones builds high temperature facility, can join real case according to demand, will light qualitative firebrick and heavy qualitative firebrick according to design program, union rises use, will achieve favorable result, meeting hoist service life and use efficiency.
What do heavy qualitative firebrick and light qualitative firebrick have different? Function of 1. heat preservation: The coefficient of thermal conductivity of heat preservation brick is in commonly 0.2-0.4(average temperature 25 ℃ of 350 ± ) W/m.k, and the coefficient of thermal conductivity of firebrick is in 1.0(average temperature 25 ℃ of 350 ± ) W/m.k above, many the heat preservation performance that can reach the heat preservation function of heat preservation brick wants to compare firebrick from this is good. 2. Fireproof degree: Of heat preservation brick fireproof degree be in 1350 degrees commonly the following, and of firebrick fireproof degree in 1350 degrees of above. 3. Brick of density heat preservation is light qualitative insulation material commonly, density is in commonly 0.8-1.0g/cm3, and the density of firebrick is in basically 2.0g/cm3 above.
How should be heavy qualitative firebrick and light qualitative firebrick chosen? Kiln furnace liner is general by working layer (wear-resisting layer) , heat-insulation layer and adiabatic layer composition, to the wear-resisting layer of igneous face the choice weighs qualitative firebrick, heat-insulation layer and adiabatic layer choose light qualitative firebrick.
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