The melting point of brick of Mo Laishi heat preservation

How much is the melting point of brick of Mo Laishi heat preservation?

   Of brick of Mo Laishi heat preservation fireproof degree very tall, highest and OK counteractive the high temperature of 1800 Celsius, but in 1600 to 1700 Celsius when heat preservation brick can begin bate, the melting point of brick of Mo Laishi heat preservation is to be in 1790 degrees or so, next its compression is spent tall also, it is probably in 260M/pa in the limit of.

 

The raw material of brick of Mo Laishi heat preservation

 

  As to Molaishi how is heat preservation brick made. It is by tall aluminous alumina clinker gives priority to material, add a few clay. Protect clay resource well, not come so the gives uptodate and modern science and technology product of brick of stone heat preservation, aluminium is the thing that the noble just can use previously, but modern technology makes this kind of resource can use aluminium to produce all sorts of product.

 

Brick of Mo Laishi heat preservation classifications

 

  Basis of brick of Mo Laishi heat preservation of density differ to be classified somewhat, cent not comes to pledge gently brick of stone heat preservation and brick of heat preservation of heavy qualitative Mo Laishi, what the basis uses temperature is different, cent is 1350 Mo Laishi bricks, bricks of 1450 Mo Laishi heat preservation, 1550 Mo Laishi bricks, above of 1550 Mo Laishi brick use the brick that regards igneous cellar as and so on commonly, because the temperature of heat-resisting is high.

 

The manufacturing technology of Mo Laishi brick

 

  Synthesize the manufacturing technology of brick of Mo Laishi heat preservation to have: (electric frit law and agglomeration law) , measure 1. The choice of raw material must want pure, by Molaishi academic composition has burden, classics is sufficient fine grind, into the ball (or press into makings piece) . 2. High temperature to calcine and into. Agglomeration law synthesizes brick of Mo Laishi heat preservation.  

     

   The recipe that home uses is main by the following kinds: ; Industrial alumina + silica; (kaolin or dried meat stone) corundum (α—AL2O3)+ silica. Industrial alumina + tall aluminium is aluminous (or silicon line stone a group of things with common features raw material concentrate) the burden that at present my factory production synthesizes Molaishi with natural tall aluminous alumina + kaolin, industrial alumina + clay, two kinds are given priority to. With Molaishi (3Al2O3·2SiO2) the expensive aluminous simple fireproof stuff that gives priority to brilliant photograph. General alumina content is in 65% ～ 75% between. Mineral composition divides Molaishi outside, contain alumina among them inferior person still contain a few glass photographs and Fang Shiying; Contain alumina taller person still contain a few corundum.

   

   After mix of fireproof raw material is even, join sawdust white again mix is even, add water next. The affiliation of water measures ordinary control to be in 50% the left and right sides, make oar body maintains better liquidity, facilitate shape, in the meantime, unapt moisture is overmuch, affect conserve time. In agitate compound process, join the additive such as intensifier of the agent that decrease water, green compact to wait even. After waiting for pug to mix slop, join additive A, mix again even. The slop infuse that will made shapes in the model, quiet place conserve falls in room temperature, make slop medium redundant moisture disperses and evaporate, general left and right sides of quiet place 24h is OK drawing of patterns, right now the moisture of slimy base is in 35% the left and right sides. Fall when moisture to 25%~30% when, dry car enters desiccator to undertake enforcing on base substrate dry, dry temperature is highest and OK after achieving dry 24~48h of 110 ℃ ; , divide when base substrate water under 2% when, go up kiln is firing. Firing undertake in the kiln of type of shuttle burning gas of 20m3, firing ℃ of temperature 1 300, heat preservation 4h, cease-fire hind drops in temperature to give pit below to 200 ℃ , firing the semifinished product after passes mechanical burnish precision work, finished product is namely after certificate of proof. Product exterior is white, air hole is the small air hole that 1mm controls more. Compare with the product exterior photograph that is the agent that make hole with EPS grain ball, air hole is smaller evener, quality of a material is more exquisite.

 

   Alone use sawdust serves as the agent that make hole, use note an oar to shape law, add the additive of certain amount, can produce the Molaishi with a good performance brick of light qualitative heat preservation. This craft is simple, suit batch production, and do not use EPS raw material, already managing cost environmental protection. The pure sawdust Mo Laishi that production gives pledges density of heat preservation brick is controlled for 0.57g·cm-3 gently, coefficient of thermal conductivity is 400 ℃ 0.16W·(m·K)-1, excel of index of product coefficient of thermal conductivity is general product, energy-saving effect rises apparently, have very good economic benefits and social beneficial result.

 

   Mo Laishi brick is fireproof degree taller, can amount to 1790 ℃ above. Loading bate begins temperature 1700 ℃ of 1600 ～ . 260MPa of ～ of 70 of intensity of normal temperature compression. Heatproof shake sex is good. Have agglomeration Mo Laishi brick and electric frit Mo Laishi brick two kinds. Agglomeration not comes stone brick is main raw material with tall aluminous aluminous grog, join a few clay or unripe alumina to make bond, via shaping, firing and make. Electric frit not comes stone brick is raw material with alumina of tall alumina, industry and fireproof clay, join charcoal or coke granule to make reducer, law of reductive report frit is used to make after shaping. The crystallization that agglomeration Mo Laishi compares electric frit Mo Laishi is small, heatproof shake sex is better than agglomeration goods. Their high temperature capability basically depends on the uniformity that the content of alumina and glass of Mo Laishi get along with distributing.

 

Does heat preservation brick use Mo Laishi on what furnace be?

Basically use at kiln of agglomeration of lining of blind angle of system of splitting decomposition of regenerator of kiln of frit of roof of blast furnace shaft and hearth, hot-blast stove, glass, oil, pottery and porcelain to wait. Mo Laishi firebrick has high structure of loading bate temperature it is compact, good to fight aggressivity, porosity is low characteristic.