Novel oxidation furnace for preparing tin dioxide

Abstract

The invention relates to equipment for preparing tin dioxide according to a gas-phase method, in particular to a novel oxidation furnace for preparing tin dioxide. The novel oxidation furnace comprises a reaction device, wherein the reaction device comprises a melting chamber on an upper layer and an oxidizing chamber on a lower layer; a partition layer is arranged between the oxidizing chamber and the melting chamber; a vertical hollow rotary shaft penetrates the partition layer; a charging opening communicated with the melting chamber and the hollow cavity of the rotary shaft is formed in the section, below the melting chamber, of the rotary shaft; a plurality of through holes communicated with the hollow cavity are formed in the section, above the oxidizing chamber, of the rotary shaft; oxide discharge openings are formed in both the melting chamber and the oxidizing chamber. As tin is melt and oxidized in the same hearth, energy is saved effectively; melted tin is thrown out of the through holes through the rotation of the rotary shaft and enough high-pressure gas after entering the hollow cavity, and strikes the wall of the oxidizing chamber, so that the interiors of tin drips can be oxidized till the tin drips are oxidized completely. Therefore, the quality of tin dioxide products is improved.

Description

technical field [0001] The invention relates to equipment for preparing tin dioxide by gas phase method, in particular to an oxidation furnace for preparing tin dioxide. Background technique [0002] Tin dioxide is widely used in the production of electrode materials, conductive oxide films, glass industry, electronics industry, and ceramics industry. At present, the production of tin dioxide mainly includes wet method and fire method. The wet method is mainly nitric acid method, which consumes a lot of nitric acid, causes serious environmental pollution, high tin consumption and low product purity. In addition, the wet method includes sol-gel method, gel-combustion method, chemical precipitation method, etc. to produce nano-scale tin dioxide. The wet method requires drying, calcination and other processes in production, so the energy consumption is also relatively large. The current fire method is mainly the gasification method. Although it solves the problem of polluting ...

AI Technical Summary

Problems solved by technology

At present, the production of tin dioxide mainly includes wet method and fire method. The wet method is mainly nitric acid method. This method consumes a lot of nitric acid, causes serious environmental pollution, high tin consumption and low product purity.

In addition, the wet method also includes sol-gel method, gel-combustion method, chemical precipitation method, etc. to produce nano-scale tin dioxide. The wet method requires drying, calcination and other processes in production, so the energy consumption is also relatively large

The current fire method is mainly the gasification method. Although it solves the problem of polluting gas in production, due to the limitation of oxidation equipment, the production is discontinuous, resulting in a large amount of heat loss and affecting the quality of the product.

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