Primary combustion auxiliary heating electric arc furnace steelmaking equipment and method

Abstract

The invention discloses primary combustion auxiliary heating electric arc furnace steelmaking equipment and method, and belongs to the technical field of metallurgy. Primary energy combustion added in an electric arc furnace is selected to supplement heat energy, the primary energy is adopted to replace secondary energy so as to obtain a larger carbon reduction benefit, and through equipment improvement, scrap steel discharging and flue gas entering a shaft furnace to pass in different channels. Smoke does not flow through the scrap steel discharging channel, and the smoke enters the shaft furnace independently through the flue. In order to uniformly distribute gas, the shaft furnace enters the furnace by adopting a plurality of branch pipes of an annular flue. The technical problems that due to the fact that a smoke inlet channel and a waste steel discharging channel are shared in traditional waste steel heating, the bearing temperature of a first-layer mechanical arm is high, materials are difficult to select, potential safety hazards are caused by water cooling, and mechanical arm bonding is likely to be caused by waste steel melting are solved. The effects of emission reduction and cost reduction are comprehensively achieved, the burning loss of steel and iron materials is reduced, and meanwhile it is guaranteed that all flue gas emission reaches the standard.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a primary combustion auxiliary heating electric arc furnace steelmaking equipment and method. Background technique [0002] my country is the world's largest producer of steel, and all of them are based on long processes. The carbon emissions of the long-process iron and steel smelting process are much greater than the short-process electric arc furnace smelting process. Therefore, in the future development of our country, the long process will be gradually restricted and the development of the short process will be encouraged. However, my country's current main power still comes from thermal power. After secondary energy conversion, the energy utilization rate is low. The energy conversion rate of thermal power generation is only about 40%, and the emissions are still large. In addition, many traditional electric arc furnace gas waste heat utilization Not good, resulting in h...

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Problems solved by technology

[0004] At present, there are also problems in the treatment of many waste steel preheating exhaust gases. Sulfur, nitrate, and dioxins are not treated, resulting in excessive emissions.

The flue gas temperature of the electric arc furnace fluctuates too much, and the current flue gas treatment technology cannot adapt to the flue gas of the electric arc furnace

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