Light-weight refractory castable for blast furnace swing chute and preparation method thereof

Abstract

The invention provides a light-weight refractory castable for a blast furnace swing chute. The light-weight refractory castable comprises the following components in parts by weight: 50-65 parts of microporous corundum particles, 10-15 parts of corundum particles, 10-15 parts of silicon carbide, 1-3 parts of cement, 1-3 parts of silica powder, 1-3 parts of carbon black, 6-10 parts of activated alumina micro powder, 1-3 parts of an antioxidant, 1-3 parts of a composite anti-explosion agent and 0.1-0.3 parts of a water reducing agent. The microporous corundum particles, the corundum particles, the silicon carbide, the cement, the silica powder, the carbon black, the activated alumina micro powder, the antioxidant, the composite anti-explosion agent and the water reducing agent are put into a stirrer and stirred for 10-15 min, and the light-weight refractory castable for the blast furnace swing chute is obtained after uniform mixing. The obtained light-weight refractory castable product for the blast furnace swing chute is small in volume density, low in apparent porosity, high in closed porosity, small in heat conductivity coefficient and high in slag erosion resistance.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory castable for a swing chute of a lightweight blast furnace and a preparation method thereof. Background technique [0002] The furnace swing chute is an important device to control the flow of molten iron into the torpedo tank (or molten iron tank). It is placed at the end of the tapping trough, and its function is to adjust the flow direction of high-temperature molten iron and ensure the continuity of the blast furnace tapping process. The same as the use of the blast furnace tap trough, the refractory castable for the swing chute must withstand the erosion of high-temperature molten iron and the erosion of slag during use, and the swing chute usually has a certain drop from the tap trough, and the high-temperature molten iron still falls In addition, in the blast furnace production process, the swing chute is in the intermittent use state ...

AI Technical Summary

Problems solved by technology

Although the problem of anti-cracking of castables has been solved, steel fibers are easy to melt at high temperature, leaving holes in the material, which is not good for material properties

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