Alumina rotary kiln uses brick of adiabatic heat preservation and tall aluminous brick

Rotary kiln cent is warm-up belt, firing belt and cooling zone. Firing the working temperature of the belt not prep above 1200 ℃ , structure of layer of kiln heat insulation spreads felt of a fireproof fiber to rely on furnace casing first, pledge with diatomite brick, clay next adiabatic brick orBleach bead brickWait for adiabatic brick build by laying bricks or stones to build, density of usable also bulk pledges gently for 0.8g/cm3 fireproof and pouring makings whole irrigates.

Warm-up takes working layer to be built with aluminous brick build by laying bricks or stones, firing take working layer to use tall aluminous brick, low calcic aluminium tall aluminium of union of acerbity brine mud is qualitative do not bake bricks or phosphoric acid combines tall aluminium not to bake bricks character build by laying bricks or stones is built. Layer of cooling zone job uses tall aluminous brick, low calcic aluminium tall aluminium of union of acerbity brine mud is qualitative do not bake bricks or phosphoric acid combines tall aluminium not to bake bricks character build by laying bricks or stones is built. Layer of cooling zone job suffers firing stock wears away bigger, divide outside using build by laying bricks or stones of compact clay brick to build, appropriate chooses phosphoric acid tall aluminium not to bake bricks character build by laying bricks or stones is built.

Lengthen rotary kiln the technical measure of fireproof material service life

The trash that incinerator of rotary kiln type burns because part is complex, have to fireproof material very strong erode action, after fireproof data is moving rotary kiln for some time appear very easily firebrick craze, the brick is seamed become loose, generation is not mixed with pace displacement between circle and circle fall off wait for a phenomenon. Because rotary kiln is the crucial equipment in this project technology craft, because the life of fireproof material reachs this rotary kiln,fall off the problem is the main problem that reliable, safety runs immediate impact system. The proposal adopts the following and specific measure:

(1) chooses high quality fireproof data vendor, fireproof material criterion appropriate uses material of high strenth, high temperature resistant, acid-proof sex to erode, what can avoid the material of low melting point such as glass to stick kiln at the same time is compound model fireproof and pouring expect or be able to bear or endure brick. For example some danger trash burns not less than 300mm; chemical composition are the fireproof material ply that uses in project case Al2O3 composition is not led under the apparent pore of; of chromic corundum brick of 80% be less than 20%; high use temperature not under 1700 ℃ .

(Of 2) firebrick dimension choose, the characteristic of the dangerous waste material that provides according to this project undertakes special design, consider exterior measure integratedly.

(3) sets for a special purpose in rotary kiln inside fireproof material fixed position prevents slipknot compose, rotatory kiln is in open repeatedly stop or run condition out of order to fall, the fireproof material inside rotary kiln carries fine from beginning to end expand to reach whole rotary kiln evenly of fireproof stuff place do not go, prevent fireproof material fore-and-aft those who reach radial is abnormal slip.

(4) uses distinctive advanced the programme of construction, the firebrick fault that changes rut seams the regulation that build by laying bricks or stones builds, use seam build by laying bricks or stones to build together, every become oneself, do not build with around circle receive, when stopping with assuring to be since rotary kiln because differ when pace displacement not twist off firebrick, accomplish the brick that photograph adjacent does not squash when the left and right sides after the liner firebrick that does newly is advanced produces displacement.

(5) undertakes drying-out strictly according to drying-out curve, execute rigorous management and monitoring to actual drying-out curve, the key ensures actual drying-out curve accords with design requirement, make sure drying-out is checked and accept through, in order to assure the quality of drying-out.

(Ply of adherent kiln skin controls appearance of 6) fireproof material. Dangerous trash expects through entering send rotary kiln into compose undertake high temperature burns inside noumenon, the high temperature that controls through 60min burns, stock is burned thoroughly high temperature flue gas and residual, form layer of stable broken bits, common says " kiln skin " can rise to protect fireproof layer action. Control of kiln skin ply is in 100mm less than, if will bring about kiln body more than,get power not all.

Adopt measure of afore-mentioned 5 respects technology, the life of fireproof material lengthens rotatory kiln greatly, rotary kiln is fireproof the desquamation of material the problem got effective settlement.