Reduction method of metal material

Abstract

The invention discloses a reduction method of a metal material. The reduction method of the metal material comprises the following steps: spraying a material to the surface of an ignited mixture; igniting the sprayed material outside the mixture to generate a combustion product, introducing the combustion product into the mixture, reacting the combustion product with the mixture to generate a reducing medium, and carrying out a redox reaction on the reducing medium and the product obtained after the combustion of the mixture. The reduction method of the metal material has the advantages that the material is sprayed to the surface of the mixture during production, so that the combustion product of the material or the material enters the mixture, the combustion product and components in the mixture are subjected to the redox reaction to reduce the combustion product into the reducing medium with reducibility, the reducing atmosphere in the mixture is adjusted effectively, meanwhile, the reducing medium can reduce nitrogen oxides into nitrogen, thus, the emission amount of the nitrogen oxides is reduced, the purpose of denitration is achieved, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting equipment, in particular to a method for reducing metal materials. Background technique [0002] The main processes for the reduction production of direct metal materials are: rotary kiln method, rotary hearth furnace method and tunnel kiln method. Among them, the rotary kiln method has huge equipment, high investment, low production capacity per unit area and the phenomenon of "ringing", resulting in a large amount of energy waste; the rotary hearth furnace method uses internal carbon pellets as raw materials, and the product has low iron grade and high sulfur content. , It is difficult to be used for the reduction of direct metal materials for steelmaking; the tunnel kiln method has problems such as low thermal efficiency, high energy consumption, long production cycle, serious pollution, unstable product quality, and small stand-alone production capacity. Therefore, it is immin...

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a metal material reduction method, which solves the problems of energy waste, low-grade iron products, serious pollution and low production capacity existing in the production process of metal material reduction in the prior art