Blast-furnace tapping channel castable

Abstract

The invention particularly relates to a blast-furnace tapping channel castable which resolves the problems that after conventional tapping channel castable construction is completed, air holes are needed to be formed by means of low temperature dissolving to exhaust air, or the tapping channel castable is prone to bursting in high temperature operation, and big fire cannot be directly used for baking. The blast-furnace tapping channel castable comprises the raw materials of, by mass, 40-50 parts of 95 brown aluminum oxide, 2-3 parts of pure calcium aluminate high alumina cement, 20-25 parts of 98 silicon carbide, 5-8 parts of activated aluminum oxide, 4-5 parts of silica powder, 1-2 parts of addition boron carbide, 0.2-0.5 part of metallic aluminum, and 2-6 parts of metallic silicon. The blast-furnace tapping channel castable has the advantages of being low in pure iron consumption and low in comprehensive cost, is directly baked through the big fire and does not burst after the construction is completed, does not affect slag erosion assistant performance, and is good in high temperature antioxidation, resistance to washing out, and thermal shock resistance. The blast-furnace tapping channel castable is energy-saving and environment-friendly, and plays great roles in prolonging service life of tapping channels, guaranteeing safety production of an iron making system, and reducing labor strength of workers.

Description

technical field [0001] The invention relates to a material used in a tapping trough for blast furnace ironmaking, in particular to a casting material for a blast furnace tapping trough. Background technique [0002] Traditional blast furnace tapping troughs are generally constructed using castables with silicon carbide, brown corundum, etc. as the main raw materials. In addition, due to the high-temperature conditions during the construction process, the conventional formula mainly uses anti-explosion fiber as the anti-explosion material. In the construction process, it is generally necessary to use low-temperature melting to form air holes to solve the problem of iron channel castables being prone to explosion during high-temperature operations. , but the formed pores affect the slag intrusion resistance of the product at high temperature and reduce the service life of the product. Contents of the invention [0003] In order to solve the problem that the castable castabl...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the castable castables of the conventional tapping trough need to be melted at low temperature to form air holes to vent after the construction is completed, otherwise the castable castables of the iron trough are easy to burst during high-temperature operation and cannot be directly baked by high fire, and provide a blast furnace tapping trough Castable