Direct reduction iron hot-charging method by use of chain conveyer

Abstract

The invention relates to a direct reduction iron hot-charging method by use of a chain conveyer, belonging to the field of direct reduction iron hot-charging technology. The method comprises the processes of discharging hot direct reduction iron into a direct reduction iron storage tank, conveying the direct reduction iron to an electric furnace shop and discharging in a transitional material tank on the furnace top by the chain conveyer, and charging into an electric furnace through a feeding chute. The method has the advantages that the direct reduction iron hot-charging method adopts a mechanical transportation mode, and compared with pneumatic transportation, pneumatic conveying equipment is not required to be constructed, therefore, the investment is low, the energy consumption is low, the equipment is convenient to maintain, and damage of the direct reduction iron during conveying can be reduced; inert gas is introduced for protection during loading of direct reduction iron, so that secondary oxidation of the direct reduction iron can be effectively prevented; the angle of the chain conveyer can be adjusted according to the height of the direct reduction iron production equipment, and is not limited by the height of the direct reduction iron production equipment, therefore, the chain conveyer can be suitable for various production flows.

Description

technical field [0001] The invention belongs to the technical field of hot charging, in particular to a method for hot charging direct reduced iron using a chain bucket machine. Background technique [0002] Direct reduced iron (DRI) can be used as a raw material for smelting high-quality steel and special steel, so it can replace scrap steel for electric furnace steelmaking. In recent years, the process of electric furnace steelmaking with direct reduced iron as raw material has become quite common. However, since the temperature of the direct-reduced iron produced by the ore after the reduction process is very high (greater than 600°C), the hot direct-reduced iron is very prone to secondary oxidation when it is sent from the direct reduction production equipment to the steelmaking workshop , so most iron and steel plants use cold direct reduced iron as the raw material for electric furnaces. [0003] Using cold direct reduced iron as a substitute raw material for steel s...

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Problems solved by technology

[0004] Although a small number of foreign steelmaking plants have realized the hot delivery of direct reduced iron and hot charging of electric furnaces by means of pneumatic conveying, domestic steelmaking plants have no experience in the manufacture and use of pneumatic conveying facilities for direct reduced iron. Imported from abroad, so the investment and operation costs required for the construction of supporting pneumatic conveying equipment, maintenance and operation are very large

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