Heat preservation brick belongs to adiabatic insulation material, the use temperature of most product is not high, can use at thermal insulation and heat-insulation layer only, flourish Cheng Naicai is small today make up the brick of high-grade heat preservation that is everybody introduction to be used at 1500 degrees of above, interested friend can talk about the home to fall.
1, alumina is hollow brick of ball heat preservation, alumina is hollow ball brick is the adiabatic and fireproof product that with alumina hollow ball makes for main raw material. It basically uses as the heat preservation thermal insulation of the liner of furnace of cultivate of high temperature industry under 1800C and facilities of expensive tepid work.
Production method: Add alumina raw material dump type first fuse inside electric stove liquid state, next furnace dump proper point of view, make frit fluid from irrigate makings chamfer to be poured out of with fixed rate, make current course and the high speed air current that shed a flat look spray head that becomes 60 ° ~90 to be 0.6~0.8MPa with pressure blow current medicinal powder, become alumina namely hollow ball, next alumina fine pink and binder press alumina of hollow ball, agglomeration certain proportion burden, shape, at dry, firing, make alumina is hollow the Al2O3 content of hollow ball brick is not less than ball brick alumina 98%SIO2 content is more than at 0.5%Fe2O3 content not quite 0.2% accumulate density to be 1.3~1.4g/cm3, apparent pore rate presses intensity to not be less than 9.8MPa for 60%-70, loading (0.2MPa) bate temperature is not less than 1700 ℃ , thermal conductance is 0.7~0.8W/(M · K) .
2, zirconia is hollow ball brick, it is one kind can be in the superhigh temperature of 1800-2400 ℃ is energy-saving model small qualitative particular kind is fireproof material. Because this is planted,the thermal conductance of heat preservation brick is 0.3-0.4W/ (M·k)-1, make adiabatic lining material not only on furnace of club of furnace of all sorts of superhigh temperature electric stove, aluminous silk, tungsten, OK still and direct charge for the making of sth. makes the lining material of the layer.
Zirconia is hollow ball brick is to use electric frit law to blow make zirconia hollow ball, in zirconia bond is added in hollow ball, the course shapes and firing the zirconia that makes is hollow ball brick goods. Hollow ball brick has this zirconia purity is tall (≥99% of content of ZrO2+ stabilizing agent) , high temperature resistant (use temperature can achieve 2200 ℃ ) adiabatic function is good, chemical stability is excellent characteristic, liner of the heat of intermediate frequency induction that basically is used at hard alloy, melt quartz furnace and operation temperature are in the superhigh temperature equipment of 2000 ℃ above works liner or adiabatic line.
3, brick of heat preservation of alumina heat insolation, call light qualitative corundum the brick. It is raw material with industrial alumina normally, mix into adds a few soft qualitative clay and bond, collective wear slop, use bubble law or gas to produce a law, pouring shape, dry, in 1400 ～ 1550 ℃ are firing, pass next cut, cut, auger, the firebrick goods that grinds treatment to want form into place. Section of this kind of adiabatic firebrick is evener densely covered circular aperture structure, because this often calls bubble alumina or corundum) light qualitative firebrick.
Because raw material is purer, commonly used firebrick goods belongs to bulk density to be less than the high-grade product range of 0.6g ／ Cm3 more. System of this kind of firebrick brick is small, compression strength is great, thermal conductivity is low, burn bulk shrinkage again small, thermal shock stability is good, the working liner of facilities of the furnace kiln of the thermal insulation that can be used at facilities of expensive tepid work or as immediate as blaze effect and accurate heat labor, but unfavorable use at contacting frit fluid to reach directly to be eroded slaggily place. Use below reducing atmosphere also have taller stability. Use temperature inspects discretion of firebrick goods purity to be able to amount to 1600 ～ commonly 1800 ℃ .
Goods of alumina heat insolation can use as the working layer that contacts blaze directly or use as thermal insulation. Porcelain of wide application Yu Tao, fireproof material is firing component of sintering furnace of kiln, pulverous metallurgy, semiconductor is firing kiln and have hydric the kiln furnace with reducing atmosphere
Above is flourish Cheng Naicai is small make up what arrange for everybody the introduction about brick of high-grade heat preservation, high-grade product can be used at the place that common product cannot use, the price should compare heat insolation of common heat preservation product is expensive a lot of, if have other question, welcome to seek advice.
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