A kind of iron ore microwave sintering method

Abstract

The invention discloses a microwave sintering method for iron ore. Iron ore, flux, returned ore and iron-containing solid waste are batched, mixed and granulated, and then directly loaded into the sintering machine with the paved bottom material by means of round roller feeding. On the trolley; the sintering trolley filled with the mixture will go through the first stage of preheating, the second stage of preheating, the microwave heating stage, the microwave sintering stage, the first stage of cooling, the second stage of cooling and the third stage of cooling according to the set moving speed. The mixture is preheated, heated, sintered and cooled to form ore, and then crushed and screened to obtain the finished sintered ore. By adopting the invention, no fuel is used, most of the flue gas can be recycled, and the problem of pollutant discharge in the iron ore sintering process can be completely solved, energy consumption can be reduced, and green production can be realized.

Description

technical field [0001] The invention belongs to a sintering process, in particular to a microwave sintering method for iron ore. Background technique [0002] The iron and steel industry is a "big energy consumer". The energy consumption of my country's iron and steel industry accounts for about 10% of the total domestic energy consumption. In recent years, the rapid development of my country's iron and steel industry has not only consumed a large amount of energy, but also caused serious damage to the environment. As an important part of steel production, the sintering process accounts for about 10%-15% of the total energy consumption of steel production. Since 80%-90% of the sintering energy consumption is solid fuel consumption and ignition energy consumption, a large amount of energy is generated. Pollutants such as SO2, NOx, CO2 and carcinogen dioxins, among which SO2 emissions account for about 33% of the entire iron and steel industry, seriously restricting the sustai...

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Problems solved by technology

[0004] Through the improvement of the above processes and the use of gaseous fuels, the consumption of solid fuels can be reduced to a certain extent, thereby reducing the emissions of sintering pollutants, but the decline is very limited

At present, the sintering flue gas desulfurization and denitrification technology equipment used by iron and steel enterprises has a large investment and high operating costs. At the same time, the by-products have not been fully utilized, and a large amount of accumulation will also cause serious environmental pollution.

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