Iron trough castable

Abstract

The invention relates to iron trough castable. The castable comprises a main material and additives, wherein the main material is prepared from, by weight, 5-8 parts of 5-8 mm barium aluminate, 15-20 parts of 3-5 mm barium aluminate, 10-15 parts of 1-3 mm andalusite, 8-15 parts of 0-1 mm calcium chromite, 2-5 parts of partical clay powder, 3-7 parts of cobalt-aluminum oxide powder, 5-10 parts of cutting powder, 3-8 parts of amorphous graphite powder, 1-2 parts of composite carbon powder, 0-3 parts of molybdenum trioxide powder, 3-5 parts of aluminum oxide micro powder, 1-5 parts of magnesium oxide powder, 1-3 parts of rho-aluminum oxide, and 0-5 parts of electric smelted pure calcium aluminate cement; based on the fact that the total weight part of the main material is 100%, the additives are prepared from, by weight, 0.1-0.2 part of calcium lignosulphonate, 0.01-0.05 part of nanometer potato powder,< 0.01 part of malic acid and 0.1 part of C<12>H<14>N<4>O<5>S<2>. A blast furnace iron trough prepared from the castable has the advantages of being good in thermal shock resistance, great in anti-erosion performance, large in iron exchanging amount and long in service life.

Description

technical field [0001] The invention relates to an iron ditch castable, which belongs to the field of iron ditch castables for metallurgy. Background technique [0002] Most of the existing iron channel castables are Al2O3-SiC-C castables, but ordinary Al2O3-SiC-C iron channel castables are used in blast furnaces, and the amount of iron passing through them at one time is about 120,000 tons. With the strengthening of smelting, the demand for increasing the output of molten iron is becoming more and more prominent, and the need for a large amount of iron to be passed through the iron channel at one time is also becoming more and more urgent. However, due to the poor corrosion resistance and thermal shock resistance of the iron channel at present, thermal spalling has occurred. And structural spalling is an important reason for the short life of the support iron ditch. [0003] CN102101782A discloses a casting material for iron trench, which is composed of magnesium aluminum ...

AI Technical Summary

Problems solved by technology

However, this kind of castable with brown corundum as the main component has poor thermal shock resistance, and it is easy to cause thermal spalling and structural spalling, which greatly increases the frequency of repairing the support iron ditch and brings great hidden dangers to the stable and safe production of the blast furnace. In addition, As a binder, sol has high viscosity, is not easy to construct, and has high cost, so it still needs to be improved

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