Horizontal continuous feeding and preheating device and strengthened preheating method thereof

Abstract

The invention belongs to the field of metallurgical technologies and discloses a horizontal continuous feeding and preheating device and a strengthened preheating method of the horizontal continuous feeding and preheating device. According to the scheme, two dust removal openings are correspondingly formed in the front portion and the rear portion of a horizontal continuous feeding and preheating duct, and the horizontal continuous feeding and preheating duct is divided into a strengthened preheating region and a smoke preheating region by the front dust removal opening and the rear dust removal opening; burners are mounted in the strengthened preheating region, and the two dust removal openings are correspondingly connected with smoke adjustment distributors through smoke pipelines; the dust removal negative pressure of the second dust removal opening is balanced by the jet flow dynamic pressure of the multiple rows of bruners in the strengthened preheating region; and the micro-negative pressure requirement of the first dust removal opening is controlled through a pressure sensor, so that the mixing amount of cold air of the first dust removal opening is reduced, the preheating efficiency of the burners and smoke of an electric arc furnace on steel scrap is improved, and the production is more environmentally-friendly.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a horizontal continuous feeding preheating device and an intensified preheating method thereof. Background technique [0002] Energy saving, environmental protection, and automation in electric arc furnace steelmaking are always one of the cores of the development of electric arc furnace steelmaking technology. [0003] The scrap steel preheating electric arc furnace is an energy-saving electric arc furnace. The electric arc furnace scrap steel flue gas preheating technology that emerged in the late 1980s is a typical energy-saving technology, and the representative technology is CONSTEEL (US5400358). CONSTEEL technology has experienced nearly 30 years of development and has become relatively mature. Its flat molten pool smelting reduces the impact on the power grid, has the advantage of reducing the maintenance of the electric furnace body, and has a certain energ...

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Problems solved by technology

Nozzles or burners are installed on the traditional CONSTEEL flue, which is also reflected in US5400358. However, the traditional CONSTEEL preheating duct is also the general flue gas channel. The area of ​​the channel is large and the height is high, so that the burner gas and scrap steel Insufficient heat exchange and low thermal efficiency

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