Abnormity alumina is hollow ball brick

There are a few products in brick of light qualitative fireproof heat preservation is more expensive, for example alumina is hollow ball goods, zirconia is hollow ball goods, price of hollow ball brick meets abnormity alumina want than mark brick a few more expensive.
Product advantage 1, use temperature can amount to 1750 degrees of above high, thermal stability is good. Ratio of the heavy change that burn a line is small, use longer. 2, optimize a structure, reduce weight of body of heater to be used now high temperature resistant material belongs to density of bulk of heavy qualitative brick to be 2.6-3.0g/cm, and hollow ball brick has alumina only 1.1~1.5g/cm, same one stere bulk, hollow ball brick can reduce use alumina 1.1-1.9 ton weight. 3, managing material reachs same use temperature, if use heavy qualitative brick its price and alumina are hollow ball brick price comparatives, and still need quite considerable heat-insulation layer fireproof material. If use alumina hollow ball brick, every stere can save 1.1-1.9 ton the use quantity of heavy qualitative brick, can save the fireproof insulation material of 80% more. 4, hollow ball has alumina of economic energy resources apparent heat preservation is characteristic, coefficient of thermal conductivity is low, can have very good heat preservation effect, reduce quantity of heat to send out, improve thermal efficiency, have the objective of managing the sources of energy thereby. Energy-saving effect can amount to 30% above.
How does hollow ball brick produce abnormity alumina? 1, alumina is hollow content of ball general A12O3 the melt inside the furnace of electric arc of three-phase of industrial alumina park of 98% above, blow voidance heart spherule to get alumina namely with the liquid state alumina that compresses melt of air general high temperature hollow ball. Before the operation, connect electrode park and bottom of black lead crucible first touched place, arc can rise after joining aluminium powder of oxidation of right amount industry. Operation electric current is 1.0kA, voltage 80-100V. After removing arc, as the melt of A12O3, gradually feed in raw material, till the makings fluid in black lead crucible is replete till, right now makings fluid temperature is 2200-2300 ℃ . After this, make crucible dump, frit current goes out. Actuate pneumatics machine, with compress air to blow current medicinal powder. Compress the angle between air nozzle and current with 60-70. Advisable. The A12O3 droplet that is blown to come loose laps air, cooling and caky make hollow ball namely. Collect the ball that plays, via choose, screening, it is finished product namely. 2, hollow ball brick produces production alumina the alumina that the raw material of brick of A12O3 hollow ball is all sorts of dimension is hollow ball, bond is vitriolic aluminium. Via 1500 ℃ industrial alumina to calcine hind uses 40h of ball mill wet grinding, classics pickling, bath, dry hind make fine pink reserve. Does its burden fall: for instance? Wholesale  makings mounds?0% , the others is Al2O3 hollow ball. Hollow ball place takes all sorts of measure scale is: >5mm1% , 5-3mm12% , 3-2mm25% , 2-0.7mm32% , bond is 20%Al2 (SO4) 3 aqueous solution, add a capacity for 5% , extra water 3.6% . Strike the hollow ball of all sorts of dimension in proportion first mix, the rejoin after joining bond and water to mix is fine pink. After expecting it is good to mix, vibration of pressurization of the model that use wood shapes. Because base substrate intensity is low, first stoving, again drawing of patterns. Firing undertake inside kiln pouring blaze, firing temperature is 1800 ℃ . The bulk density of hollow ball brick is alumina 1.25g/cm3, 71MPa of intensity of normal temperature compression, 0.7W/ of coefficient of thermal conductivity (M.K) , (1300 ℃ , water-cooling) thermal shock stability 2.
Use temperature of utility of hollow ball brick is in abnormity alumina the liner of furnace of high temperature kiln of 1500 ℃ above, furnace of all sorts of high temperature kiln that wait for an industry like pottery and porcelain of fireproof material, industry liner brick; Heat up the heat preservation thermal insulation of labor facilities, wait like the petro-chemical aerification furnace, furnace that make energy of life.
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