Swinging chute working lining castable of composite material and preparation method of castable

Abstract

The invention relates to a swinging chute working lining castable of a composite material and a preparation method of castable. The castable is prepared from the following raw materials in percent by weight: main materials: 40%-55% of fused alumina, 20%-28% of silicon carbide, 5%-12% of alundum powder and 4%-8% of activated alumina micro powder; and auxiliary materials: 8%-12% of B4C composite binding agent and 0.2%-0.35% of antidetonant. The preparation method of the castable is simple and easy to realize, product construction is simple and convenient, drying is speedy after casting construction, so that a swinging chute working lining can be rapidly baked and put in tapping for use, and the once iron influx is eighty to ninety thousand tons; the castable has the characteristics of excellent scrap iron flushing resistance, excellent corrosion resistance, good thermal shock stability, lowered comprehensive cost, greatly-increased product benefit, and the like; and the comprehensive benefits of the swinging chute working lining and the requirement on once iron influx can be effectively increased and prolonged.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a castable for the working lining of a swing chute made of composite material and a preparation method thereof. Background technique [0002] Low-cement castables are generally used as lining refractory materials for the swing chute of the blast furnace casting house. Due to the large amount of aluminate cement added to the low-cement castables, the hydration time is long, and maintenance is required after construction. The construction period is prolonged and cannot be quickly Drying and baking; the above-mentioned materials have a short service life, resulting in too frequent repairs of the working lining of the swing groove. Generally, the amount of iron passing through is about 40,000 to 50,000 tons. The labor intensity of the construction workers is high, and the high-heat environment causes various unsafe conditions. Due to frequent maintenance and repair of the work...

AI Technical Summary

Problems solved by technology

[0002] Low-cement castables are generally used as lining refractory materials for the swing chute of the blast furnace casting house. Due to the large amount of aluminate cement added to the low-cement castables, the hydration time is long, and maintenance is required after construction. The construction period is prolonged and cannot be quickly Drying and baking; the above-mentioned materials have a short service life, resulting in frequent repairs of the working lining of the swing groove. Generally, the amount of iron passing through is about 40,000 to 50,000 tons. The labor intensity of the construction workers is high, and the high-heat environment causes many unsafe conditions. Due to frequent maintenance and repair of the working lining of the swing chute and the quality is more difficult to guarantee; with the continuous progress of the ironmaking process, the service life requirements for the refractory materials used for the working lining of the swing chute are also getting higher and higher; according to the refractory materials for the working lining of the swing chute Analysis of its damage mechanism in the process of use shows that: the working lining castable not only has to withstand the erosion of high temperature slag and iron, the cracks of the pouring body in the rapid cooling and hot environment, and the erosion resistance of the slag and iron flow, but also must improve the use of working lining refractories life expectancy