Pledge Mo Laishi brick belongs to light qualitative firebrick gently, it is product of one of fireproof material light qualitative heat preservation, bases is 3 oxygen 2 melt aluminium, advocate brilliant photograph is Mo Laishi photograph, have good heatproof shake performance, fireproof degree tall.
Among them, the ratio of Al2O3/SiO2 and micromechanism decided light qualitative Molaishi mechanical function of the brick, among them Al2O3 content was the Mo Laishi brick of 68% to arrive to compare high flexural strength in 1300 ℃ make known to lower levels, and rupture in what 5.7MPa.Nm achieved below normal temperature tenacity, all fall than normal temperature raised 1.6 times, and as temperature elevatory, intensity and tenacity not only without attenuation, rise greatly instead. Because cyanite is in,decompose expand in the process, a lot of small hole were formed between grain framework, because this not comes gently character,the producer goods of stone brick basically uses the fireproof data that is main raw material with cyanite. In the refractory products that contacts directly with fuse-element, the corrosion resistance that the existence of these small hole reduced fireproof material can. And the liner that pledges Mo Laishi brick is to use heat of as inhomogenous as fuse-element contact high temperature kiln gently, ask to have high use temperature not only, and the requirement has low heat to conduct coefficient. fireproof to pledging gently commonly material, inside certain limits, hole is smaller, heat conduction rate is lower; Decompose by cyanite so expand the small hole that form is to improve light qualitative Molaishi the advantage of function of bricky heat preservation.
Mo Laishi is raw material with 3AL2O3 · 2SiO2, among them AL2O3 and SiO2 are occupied respectively 71.8% with 28.2% . In siliceous aluminous system, its melting point is 1910 ℃ , it is to be next to corundum (melting point 2050 ℃ ) mineral photograph. The light qualitative Molaishi that gives priority to brilliant photograph with Molaishi so use temperature of the brick is higher. If in the cyanite in decomposing a process complete change is Molaishi, add alumina in cyanite pink. Mo Laishi firebrick has qualitative sex use temperature is high, thermal capacity is small, coefficient of thermal conductivity is low, intensity is high, heatproof shake performance is good wait for a characteristic. You Lajing stone and content of AL2O3 of complex of industrial oxidation aluminium powder are the Molaishi of 67.1% light qualitative brick, basically use at the kiln furnace of architectural pottery and pottery and porcelain of all sorts of daily expense pottery and porcelain, special type industry, use at furnace of all sorts of high temperature kiln of petro-chemical industry, use at fighting all sorts of high-grade heating furnace of the metallurgy industry of igneous liner, large hot-blast stove directly. The working temperature of furnace of this kind of kiln compares temperature of susceptive of other light qualitative data (for example fireproof fiber) should tall, and all sorts of property that the position that uses light qualitative data can develop this kind of light qualitative firebrick adequately.
The manufacturing technology of Mo Laishi firebrick and tall aluminous brick are identical, use classics batch mixing, shape, a few working procedure make stoving, fire. Purity of fire temperature and burden composition, raw material and the requirement to firebrick function are concerned, it is commonly between 1500~1700 ℃ . The brick has Mo Laishi firebrick and corundum Mo Laishi rate of higher bate temperature, higher high temperature creep and better heatproof shake performance, wide application received in kiln of furnace of industry of anxious etc of kiln of frit of blast furnace hot-blast stove, glass, dry extinguish. Mo Laishi firebrick is corroded in what high temperature falls to suffer alkalescent firebrick easily corrode. Additional, mo Laishi can be destroyed below high temperature, because it can react with vapor,produce Al2O3. Mo Laishi firebrick is unfavorable and long-term in the environment that applies at content of tall basic slag, tall lunt. Outside dividing Molaishi and the firebrick that its and corundum are combined and become, mo Laishi still can be combined with other material and become firebrick, firebrick of the Mo Laishi that be like zirconium, Molaishi one carborundum firebrick, in order to improve its performance. The material of firebrick of Mo Laishi of the zirconium that be called is Molaishi - zirconia composite material.
With Molaishi (the light qualitative Molaishi that 3Al2O3 · 2SiO2) gives priority to brilliant photograph the brick is a kind of expensive aluminous fireproof stuff. Content of common aluminium powder is 65%~75% . Outside dividing Molaishi, contain alumina content low mineral still contain a few glass photographs and Fang Shiying; Contain alumina content tall mineral still contain a few corundum. In order to import board shape corundum, high pure electric frit corundum is main raw material, application exceeds small pink advancedly to add a skill, classics batch mixing, drying, shape wait for craft, become in the fire inside kiln of form of high temperature shuttle. Mo Laishi pledges the brick applies extensively at residuum aerification furnace gently, synthetic ammonia changes furnace 2 paragraphs, carbon black reaction furnace, in the equipment such as fireproof kiln. Product exterior dimension, manage changes index, service life to wait to all accord with client demand.
Compressive strength of Mo Laishi normal temperature is 70MPa. Heat-resisting performance is good. Electric frit Mo Laishi has agglomeration Mo Laishi and electric frit Mo Laishi two kinds. It is main raw material with tall aluminous aluminous grog, join a few clay or unripe alumina to make binder, agglomeration not comes stone brick, after shaping firing. It is raw material with alumina of tall alumina, industry and saggar, join charcoal or coke fine grained to serve as reducer, classics Mo Laishi brick is produced with law of reductive report frit after shaping. The crystallization that the crystallization of electric frit Mo Laishi compares agglomeration Mo Laishi wants big, its fight goods of agglomeration of excel of thermal shock function. Its high temperature capability basically depends on of alumina content and Molaishi and glass distributing equably.
Bricky composition makes light qualitative Molaishi pledge the brick uses Molaishi respectively gently curium grain of wood chip, epispastic polystyrene and its mixture make the fire that add capable person. According to recipe burden, when burden, the dry mixture 2-3 in increasing alumina of clinker, industry, kaolin person agitate pool first minute, join a person to add content and bond next (adscititious) , edge border agitate, mix is even, agitate can be used 24 hours.
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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