Novel environment-friendly anhydrous stemming for blast furnace iron notch and preparation method of stemming

Abstract

The invention relates to a novel environment-friendly anhydrous stemming for a blast furnace iron notch. The novel environment-friendly anhydrous stemming for the blast furnace iron notch is characterized by being prepared, by mass, 10-20 parts of coke, 10-20 parts of calcined pyrophyllite particles, 10-20 parts of brown fused alumina particles, 10-20 parts of bauxite powder, 5-10 parts of ferro silicon nitride, 5-10 parts of silicon carbide powder, 10-20 parts of clay, 5 parts of a carbon-based composite material and 5-10 parts of a composite binding agent. The novel environment-friendly anhydrous stemming for the blast furnace iron notch and a preparation method of the stemming have the following advantages that the pollution is small, the environment-friendly performance is good, and the stemming is a first choice of am iron and steel enterprise; the plasticity and cohesive property are good, the stemming is easily extruded into gaps and cracks, and the gaps and cracks are easily filled with the stemming; the porosity is proper, and moisture is conveniently discharged during drying; the volume contraction is small at high temperature, so that the cracks are prevented; the stemming is good in sintering performance, high in strength and resistant to flushing and corrosion; the stemming is easily cracked, the iron notch is deep, and the iron outlet time is long.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a novel environment-friendly anhydrous taphole mud used in a blast furnace taphole and a preparation method thereof. Background technique [0002] Gun clay is a refractory material used to block the taphole in ironmaking blast furnaces, and its performance is directly related to whether the blast furnace can operate safely. During the operation of the blast furnace, the blast clay plays three major functions: blocking the taphole, stably discharging molten iron and slag, protecting the hearth, and prolonging the life of the refractory brick at the bottom of the blast furnace. With the development of new iron and steel smelting technologies, modern blast furnaces are developing towards large-scale, ultra-large, automated, high-life, high-pressure, high-strength smelting directions, and are strengthened by high-tech technologies such as high wind temperatur...

AI Technical Summary

Problems solved by technology

However, when the iron hole is opened, the excessive strength will bring difficulties to drilling, increase the consumption of drill pipes and the labor intensity of workers, so the blasting mud must have appropriate strength

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