Method of melting aluminum ash to prepare brown aluminum oxide

Abstract

The invention discloses a method of melting aluminum ash to prepare brown aluminum oxide. At first, aluminum ash is subjected to an acidification treatment and an alkalization treatment in sequence; then solid-liquid separation is performed to obtain aluminum ash; the obtained aluminum ash is subjected to drying dehydration and high temperature burning; after the aluminum ash is cooled, the aluminum ash is mixed with iron chips and coke, and finally the mixture is sintered to obtain brown aluminum oxide. In the melting step, burned aluminum ash, iron chips, and coke are mixed according to a ratio of 100:3-4:8-13, the mixture is melted for 2 to 3 hours at a high temperature of 2300 to 2700 DEG C, and finally the mixture is ground and graded to obtain the brown aluminum oxide. The aluminum ash is subjected to a harmless treatment and converted into valuable resources. The problem of shortage of high aluminum bauxite is solved, and the production cost of brown aluminum oxide is also reduced.

Description

technical field [0001] The invention relates to the field of resource utilization of solid waste in the metallurgical industry, in particular to a method for preparing brown corundum by smelting aluminum ash. Background technique [0002] Brown corundum is made of bauxite and coke (anthracite) as the main raw materials. It is smelted at high temperature in an electric arc furnace to form brown artificial corundum, also known as corundum. Mainly contains 95.0% ~ 97.0% Al 2 o 3 , and the rest is a small amount of Fe 2 o 3 , SiO 2 、TiO 2 Wait. Brown fused alumina has the characteristics of high purity, good crystallization, strong fluidity, low coefficient of linear expansion, corrosion resistance, and has a wide range of applications. With the depletion of high-grade bauxite resources as the main raw material for brown fused alumina production, the grade of bauxite used to produce brown fused alumina is getting lower and lower, which has become the most important factor...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems such as complex process, high energy consumption, unqualified product physical and chemical indicators, and secondary pollution in the production of brown corundum by using aluminum ash, the present invention provides a method for preparing brown corundum by smelting aluminum ash. The process is simple, the process control conditions are mild, the equipment production efficiency is high, and the equipment investment is small, which realizes continuous production, realizes the harmless treatment and resource utilization of aluminum ash, and solves the problem of high alumina bauxite used in the production of brown corundum. The problem of resource depletion reduces the production cost of brown fused alumina

Images