Novel iron runner castable with waste refractory as main material

Abstract

The invention provides a novel iron runner castable with a waste refractory as a main material. The novel iron runner castable comprises the following components in percentage by mass: 46-56% of waste iron runner castable particles; 2-6% of waste silicon carbide sagger material particles; 12-14% of waste silicon carbide sagger powder; 12-18% of waste 95 ceramic particles; 2-3% of ball pitch; 1-1.4% of pure calcium aluminate cement; 8-10% of alumina micro powder; 2-3% of submicron SiO2 micro powder; 0.8-1% of metal silicon powder; 0.1%-0.16% of metal aluminum powder; 0.16- 0.2% of nano carbon black; 0.08-0.1% of explosion-proof fiber; and 0.1%-0.16% of a dispersing agent; and the iron runner castable is formed by uniformly stirring the above components and 5% of water by performing vibration molding. According to the iron runner castable, various waste materials are fully utilized, so that the comprehensive cost of the iron runner castable is greatly reduced; and meanwhile, industrial application proves that the iron runner castable disclosed by the invention is good in field use effect, high in batch production operability, excellent in physical property and good in quality stability, and is suitable for each part of a casting house.

Description

technical field [0001] The invention belongs to the field of indeterminate refractory materials, and in particular relates to a new type of iron ditch castable with waste and old refractory materials as the main material. Background technique [0002] The domestic demand for blast furnace castings exceeds 600,000 tons per year. The annual consumption of fused corundum due to iron channel materials is close to 300,000 tons, and fused corundum consumes 2300 degrees of electricity per ton. The annual consumption of silicon carbide due to iron trench materials is close to 100,000 tons, and each ton of silicon carbide consumes 6,000 degrees of electricity. At the same time, large and medium-sized iron and steel enterprises have a large number of used iron trench linings that are dismantled and discarded every year, a large number of used alumina electric ceramics are discarded every year in the power industry, and a large number of used silicon carbide sagger plates are discarde...

AI Technical Summary

Problems solved by technology

[0003] Although there are reports of a small amount of waste and old refractories being used in iron trench castables in China, the application of waste and old refractories is single, the utilization rate of waste and old refractories is not high, it is difficult to break through 60%, and the quality fluctuates greatly

This is because these waste refractories generally have problems such as high impurity content and high water absorption, which lead to a large increase in the amount of water added to the castable and the amount of cement, which seriously affects the service life of the castable.

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