A high-efficiency iron separation system and process for red mud by gravity separation

Abstract

The invention discloses a high-efficiency iron separation system for red mud by gravity separation, which includes a slurry pump, primary iron separation equipment and secondary iron separation equipment. The primary iron separation equipment includes a primary cyclone, a ball mill, and a magnetic separator And the first translational elliptical separator, the secondary iron selection equipment includes the secondary cyclone and the second translational elliptical separator, the primary cyclone and the secondary cyclone include the inlet, overflow The inlet of the slurry pump is connected to the suction pipe of the slurry pump, and the outlet of the slurry pump is connected to the inlet of the first-stage cyclone through the inlet and outlet pipe of the first-stage cyclone. The underflow port of the primary cyclone is connected with the feed port of the ball mill, and the overflow port of the primary cyclone is connected with the feed port of the secondary cyclone through the feeding conveying pipe of the secondary cyclone. The invention also discloses a high-efficiency iron-separation process from red mud by a gravity separation method, which includes the process steps of using the above-mentioned system to select iron step by step. The invention can efficiently recycle the magnetic iron, and the grade of the recovered concentrate is high.

Description

technical field [0001] The invention belongs to the field of resource utilization of alumina red mud, and in particular relates to a high-efficiency iron separation system and process of red mud by gravity separation. Background technique [0002] The iron content in red mud is about 18-35%, which has a high recovery value. There are three main methods for recovering iron concentrate from red mud in the prior art: [0003] One is through magnetic separation. Patent CN101648159A discloses a method for recovering iron concentrate from red mud by using a combination of medium magnetic machine recovery of strong magnetic iron and high gradient magnetic separator recovery of weak magnetic iron. This method has iron recovery The problem of low rate (28-35%). [0004] The second is direct reduction roasting. Patent CN103074456A discloses a method of directly smelting iron in a blast furnace by drying, pelletizing, adding coke and other additives. This method has the problem of hig...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of low total iron recovery rate and low concentrate grade of the existing red mud iron concentrate, the present invention provides a high-efficiency red mud iron separation system and process by gravity separation

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