Castable material for aluminum melting furnace

Abstract

The invention relates to a castable material for an aluminum melting furnace. The castable material comprises the following components of 70-88 percent of I-level bauxite, 5-15 percent of clay, 3-10 percent of kyanite and 4-8 percent of binding agent, wherein the I-level bauxite with the grain size of 5-3 mm accounts for 35-45 percent, the I-level bauxite with the grain size of 3-1 mm accounts for 20-30 percent, the I-level bauxite with the grain size of 1-0 mm accounts for 15-25 percent, and the I-level bauxite with the grain size lower than 0.09 mm accounts for 15-25 percent. All the physical performance indexes of the refractory castable material inner lining produced according to the grain size and the mixture ratio are as follows: the breaking strength is 15.6MPa, the compression strength is 41.3MPa, the linear change rate is 0.18 percent, the volume density is 2.81 g.cm, and the actual application shows that all the physical performance indexes can fully meet the requirements of service conditions of the inner lining of the aluminum melting furnace, no crack phenomenon occurs, the problem of alumetizing is eliminated, and the service life can reach more than 4 years.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a high-alumina castable used for the inner lining of an aluminum melting furnace. Background technique [0002] In recent years, with the continuous development of refractory materials in my country and the gradual deepening of various researches, the types and quantities of refractory materials have continued to increase, and the quality has greatly improved. In particular, the production of refractory castables has made great progress and development, and has basically been able to meet the needs of metallurgical enterprises. However, for aluminum melting furnaces, although the quantity of refractory castables is large and the quality has been improved, the problem of cracks in the refractory castables used in aluminum melting furnaces during use has not been solved. Once cracks occur, molten aluminum will penetrate into the inner lining, thereby destr...

AI Technical Summary

Problems solved by technology

However, for aluminum melting furnaces, although the quantity of refractory castables is large and the quality has also improved, the problem of cracks in the refractory castables used in aluminum melting furnaces has not been resolved.

Once cracks occur, molten aluminum will penetrate into the inner lining, thereby destroying the overall structure of the refractory castable, causing damage and peeling, and greatly reducing the service life of the aluminum melting furnace

The study found that the main cause of aluminization is the poor corrosion resistance of the refractory castable lining and insufficient bulk density.