Novel process for smelting antimony oxide slag

Abstract

The invention aims at providing a novel process for smelting antimony oxide slag, which has the advantages of little material consumption and pollution and simple process. The implementation process of the invention comprises the following steps that: a blast furnace specially used for smelting antimony-lead alloy is adopted for oxygenated high-temperature smelting (the air quantity is more than 2,000 cubic meters per hour, and the wind pressure is 29.4 kpa per square meter), and the temperature is made to quickly rise to between 1,400 and 1,500 DEG C; by raising the temperature, properly adding smelting auxiliary raw materials according to the component percentage of silicon:iron:calcium:alkali of 140 percent:30 percent:20 percent:10 percent and high-temperature smelting, the antimony slag is separated; and the reducing reaction is complete. The process has the advantages that: the purity of the produced antimony oxide is improved to be more than 93 percent from original 92 percent, the number of smelting reduction is reduced from 4 to 2, the cost is reduced by nearly 90 percent, and the environmental protection cost is reduced by 65 percent; the sale price of the antimony oxide slag in the market is greatly raised, the man hour of a labor is greatly reduced, the overall benefit is obviously improved, and the emission(lower than GB16297-96) of sulfur dioxide dust is greatly reduced. At the same time, the process has also the characteristics of simple smelting flow, high product yield and quality, resource conservation, low cost and the like, and can improve overall social benefits; and to be more important, the antimony smelting flow can exceed the national environmental protection standards.

Description

Technical field: [0001] The patent of the present invention relates to a smelting process of antimony, specifically a smelting process of antimony oxide slag. Background technique: [0002] At present, there are two methods of smelting antimony: fire method and wet method. Among them, fire method antimony smelting process is the most widely used. Its working process is to make Sb2S3 into Sb2O3 (commonly known as antimony Oxygen), and then through reduction smelting and refining, it becomes metallic antimony. Although the smelting of antimony is generally still dominated by pyrometallurgy, its production process has notable characteristics such as more consumables, higher pollution, and complicated processes. Invention content: [0003] The purpose of the present invention is to provide a new antimony oxide smelting process with less consumable materials, light pollution and simple process. [0004] The present invention is realized in the following way: a blast furnace d...

AI Technical Summary

Problems solved by technology

Although the smelting of antimony is generally still dominated by pyrometallurgy, its production process has significant characteristics such as more consumables, higher pollution, and complicated processes.