Manufacturing process of regular fused alumina

Abstract

The invention provides a manufacturing process of brown corundum, which is characterized in that it includes the following steps: the first step is to put crushed aluminum ash and sintering additives into a rotary kiln or a shaft kiln, and the gas produced by the generator Provide heat and roast it to 800°C; the second step is to send the roasted bauxite material into the insulation material tank, add iron filings and then transfer it to the insulation material bin; the third step is to use the feeder to feed the second In the step, the materials in the thermal insulation silo are sent into the electric furnace to continue heating and smelting. After the reaction is complete, they are inspected, cooled, and classified to obtain the finished product.

Description

technical field [0001] The invention belongs to the field of smelting, and in particular relates to a production process of brown corundum. Background technique [0002] Brown corundum is a brown artificial corundum obtained by melting and reducing three raw materials of boiled bauxite, carbon material and iron filings in an electric furnace. The main chemical composition is Al 2 o 3 , can be used to make abrasive tools. In the traditional brown fused alumina production process, the aluminum ore is generally calcined at high temperature in a kiln to make bauxite, and then, after the bauxite is cooled, the bauxite is added to the electric arc furnace for smelting to make brown fused alumina; , the bauxite calcining process and the production process are loosely arranged. After the bauxite is calcined by the bauxite process, it is naturally cooled by high temperature, and its heat energy is wasted; and in the production process, the bauxite needs to be heated to a certain le...

AI Technical Summary

Problems solved by technology

In the traditional brown fused alumina production process, the aluminum ore is generally calcined at high temperature in a kiln to make bauxite, and then, after the bauxite is cooled, the bauxite is added to the electric arc furnace for smelting to make brown fused alumina; , the bauxite calcining process and the production process are loosely arranged. After the bauxite is calcined by the bauxite process, it is naturally cooled by high temperature, and its heat energy is wasted; and in the production process, the bauxite needs to be heated to a certain level in the electric arc furnace. It needs to consume a lot of heat energy to make it at a high temperature; therefore, the existing manufacturing process of brown fused alumina wastes heat energy and increases the manufacturing cost of brown fused alumina.