A method of smelting pure metals with precise control of heat loss

Abstract

The invention provides a method for smelting pure metals with precise control of heat loss value, the method includes directly spraying the raw ore containing the target metal into the molten pool of the smelting furnace, and injecting reducing gas and combustion-supporting gas into the smelting furnace at the same time In the smelting furnace, the "boiling" phenomenon occurs in the molten pool, and the reducing gas reduces the original mineral containing the target metal, and the excess reducing gas burns with the combustion-supporting gas in the upper part of the smelting furnace to generate heat. It is characterized in that the H in the reducing gas 2 The content of is 80‑100%, and O in the combustion-supporting gas 2 The content is 80-100%, and the temperature of the combustion-supporting gas is controlled at 300-400K; the molten pool includes slag and target metal liquid. The present invention adjusts reducing gas H 2 content, combustion-supporting gas O 2 content and the temperature of the combustion-supporting gas, so that the heat flow in the smelting furnace meets the optimal economic benefits, and the heat loss value in the smelting furnace is controlled to maintain a stable range.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a smelting pure technology method for precisely controlling heat loss value. Background technique [0002] At present, in the field of metal smelting, the traditional blast furnace ironmaking still occupies a dominant position in the ironmaking process. The blast furnace ironmaking process is complex, including sintering, pelletizing, coking and other processes. Not only is the process long and complex, Moreover, high energy consumption and serious pollution have made blast furnace ironmaking stand on the cusp of energy conservation and emission reduction. [0003] Although many types of non-blast furnace ironmaking processes have been developed, none of these processes can occupy a mainstream position in terms of production capacity and process maturity. Moreover, most processes cannot completely get rid of large polluting processes such as sintering and coki...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of metal smelting, the traditional blast furnace ironmaking still occupies a dominant position in the ironmaking process. The blast furnace ironmaking process is complex, including sintering, pelletizing, coking and other processes. Not only is the process long and complex, Moreover, high energy consumption and serious pollution make blast furnace ironmaking stand on the cusp of energy conservation and emission reduction

[0003] Although many types of non-blast furnace ironmaking processes have been developed, none of these processes can occupy the mainstream position in terms of production capacity and process maturity

Moreover, most processes cannot completely get rid of large polluting processes such as sintering and coking

Among them, although the sintering process can consume a lot of low-quality ore powder in my country, it greatly increases the production cost and pollution discharge of enterprises.

Moreover, during the coking process of the coking plant, the emission of polluting gases is difficult to meet today's environmental protection concept

In addition, the existing metal smelting process requires aerobic heating, and many iron minerals are incompletely burned to produce carbon monoxide to reduce iron ore. There is a serious problem of heat loss. The large amount of lost heat causes great waste and affects the smelting efficiency. , High requirements on raw materials, complex operation, difficult to meet the requirements of industrial production, etc.

Images