Anhydrous pressed-in mud for blast furnace

Abstract

The invention provides anhydrous pressed-in mud for a blast furnace. The anhydrous pressed-in mud comprises aggregate, a matrix, a binder and an additive, wherein the aggregate is composed of high-alumina bauxite, silicon carbide and zircon, the adding amount of the aggregate is 45-55 parts and the granularity of the aggregate is smaller than 0.4 mm; the matrix is composed of silicon micro powder and magnesium oxide, and the adding amount of the matrix is 10-25 parts; the binder is liquid phenolic resin, and the adding amount of the binder is 15-35 parts; and the additive is sodium hexametaphosphate, and the adding amount of the additive is 2-4 parts.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an anhydrous press-in mud for blast furnaces. Background technique [0002] Compared with qualitative refractory products, unshaped refractory materials represented by refractory castables have the advantages of short process flow, low production energy consumption and cost, convenient use, wide application range, integrity and good use effect, so they are widely used in the world. It has developed rapidly, and its proportion in the whole refractory material is getting higher and higher. In some countries with advanced refractory technology, the output of unshaped refractories has approached or even exceeded the output of shaped products. For example, the current output of unshaped refractory materials in Japan accounts for about 60% of the total refractory materials; in the United States, it is about 50%; in Britain, Germany, France and other countries,...

AI Technical Summary

Problems solved by technology

In order to improve the service life of the blast furnace, improve the safety factor of the blast furnace, and avoid accidents, it is necessary to maintain the blast furnace regularly, and the excessively long maintenance cycle or too frequent maintenance times will affect the stable operation of the blast furnace, which is not conducive to the smooth production of the blast furnace Reach production

The traditional maintenance method needs to stop the furnace. After cooling the furnace, use the water system press-in material to fill the damaged part. Since the water-system press-in material needs to be baked for a long time, the efficiency is affected. At the same time, it shrinks greatly at high temperature and cannot form a whole. Generally, resulting in frequent maintenance