Waterless taphole mix for blast furnace taphole

Abstract

The invention discloses a waterless tamping for blast furnace tapping comprising 80-120 weight portions of component A and 15-25 weight portions of component B, wherein the component A comprises (by weight portions) brown fused alumina with grain size of 1-3mm 20-40 parts, brown fused alumina powder with grain size <=0.074mm 15-25 parts, kyanite with grain size <=1mm 2-7 parts, SiC with grain size <=0.074mm 8-15 parts, Guangxi clay wash with grain size <=0.088mm 5-20 parts, mica powder with grain size <=0.074mm 5-10 parts, coke with grain size <=2mm 10-20 parts, metallic silicon powder with grain size of 0.044mm 0.5-3 parts, carbon black 0.1-2 parts, the component B being conjugation agent. The waterless tamping has good high-temperature strength and slag erosiveness resistance.

Description

technical field [0001] The invention relates to a blast furnace clay, in particular to an environment-friendly anhydrous blast furnace clay suitable for plugging a blast furnace taphole, and belongs to the field of refractory materials. Background technique [0002] With the rapid development of my country's iron and steel industry, a large number of large and medium-sized iron-making blast furnaces have been put into production across the country. The blast furnaces are developing in the direction of large-scale, long-life, and intensified smelting. The performance requirements for blasting clay are getting higher and higher. More and more attention has been paid to this aspect, which also requires the clay to be environmentally friendly. Commonly used gun mud has low high-temperature strength, poor slag erosion resistance, and is not resistant to slag and molten iron erosion. It expands holes quickly during use and cannot meet the requirements of blast furnace for long-term...

AI Technical Summary

Problems solved by technology

Commonly used gun mud has low high-temperature strength, poor slag erosion resistance, and is not resistant to slag and molten iron erosion. It expands holes quickly during use and cannot meet the requirements of blast furnace for long-term iron tapping; its binder is usually coal tar or anthracene. Oil is used as a binding agent. This kind of gun mud emits a lot of toxic yellow smoke during use. Its main components are phenolic compounds, anthracene, naphthalene, pyridine and other harmful substances, which are irritating to skin and mucous membranes and can cause skin cancer.