Hot water quenching device and method for direct-reduced iron (DRI) of rotary hearth furnace

Abstract

The invention provides a hot water quenching device for direct-reduced iron (DRI) generated in iron-containing solid waste treatment of a rotary hearth furnace. The device comprises the rotary hearth furnace, a transverse barrel-shaped centrifugal dehydrator, a heat DRI sliding tube, a hot water tank, a material chute, a first conveying device positioned at the output end of the material chute, a material storing bin positioned below the output end of the first conveying device, a water collecting tank and the like, wherein the heat DRI sliding tube is used for conveying materials into a barrel cavity in the transverse barrel-shaped centrifugal dehydrator; a high-pressure hot water nozzle which is connected with the hot water tank is arranged at an inlet of the barrel cavity, and the heat DRI sliding tube can enter the barrel cavity through the inlet. With the adoption of the device, the DRI produced by the rotary hearth furnace can be cooled to finally meet the requirement that the DRI is used as a cooling agent for electric steelmaking.

Description

technical field [0001] This patent relates to the field of direct reduced iron produced by a rotary hearth furnace for iron-containing solid waste treatment, and is suitable for hot water quenching treatment of direct reduced iron in a rotary hearth furnace. Background technique [0002] For a long time, problems such as iron source raw materials for electric furnace steelmaking have restricted the development of electric furnace steel production in China. At present, the domestic raw materials for electric furnace steelmaking mainly come from imported scrap steel, pig iron lumps, hot metal and direct reduced iron. Among them, direct reduced iron is pure in iron quality and low in carbon content. It can adopt continuous feeding method and can maximize the capacity of electric furnace steelmaking. It is the best residual element diluent and iron source material for high-quality electric furnace steelmaking. [0003] "Carbon-based rotary hearth furnace + grinding and magnetic...

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Problems solved by technology

[0008] (1) Since the tail of the slag removal machine is placed in a deep water pool, the equipment is soaked in hot water, and the equipment is seriously aging;

[0009] (2) The fine slag particles damaged by water quenching are difficult to be cleaned by the slag removal machine in time, and are easy to accumulate at the bottom of the pool;

[0010] (3) The bottom of the deep water pool is full of cooling materials, and the pushing of the tail base of the slag removal machine may easily cause the equipment to be stuck, increasing the resistance during operation, the failure rate of the equipment operation is high, and the base is difficult to repair in the deep water pool , it is difficult to meet the requirements of continuous production

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