Reduction method of iron ore powder

Abstract

The invention belongs to the technical field of production of reduced iron powder, and particularly relates to a reduction method of iron ore powder. The reduction method of the iron ore powder comprises the following steps that under the hydrogen atmosphere, the iron ore powder is sequentially subjected to first-stage reduction, second-stage reduction and third-stage reduction, and reduced iron powder is obtained; the temperature of the first-stage reduction is 810-830 DEG C; the temperature of the second-stage reduction is 920-940 DEG C; and the temperature of the third-stage reduction is 945-960 DEG C. According to the reduction method of the iron ore powder, the hydrogen atmosphere is used as a reduction medium, the temperature in the production process is low, the whole reduction process is environmentally friendly, resources are saved, and the production cost is low.

Description

technical field

[0001] The invention belongs to the technical field of reduced iron powder production, and in particular relates to a method for reducing iron ore powder. Background technique

[0002] With the continuous development of powder metallurgy technology, the amount of iron-based powder is increasing. The production methods of reduced iron powder at home and abroad mainly include reduction method, electrolysis method, atomization method and mechanical pulverization method. Among them, the reduction method is low in cost, large in output and suitable in performance, and is widely used in the industrial production of reduced iron powder. Iron powder is produced by reduction method.

[0003] The traditional reduction method generally adopts the preparation process of two-stage reduction, that is, the first reduction in the tunnel kiln and the second reduction in the fine reduction furnace. Put it into a SiC tank, use tunnel kiln gas to burn and heat to 1100-1200°C f...

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