Efficient iron separation system and process adopting gravity separation method for red mud

Abstract

The invention discloses an efficient iron separation system adopting the gravity separation method for red mud. The efficient iron separation system comprises a slurry pump, first-level iron separation equipment and second-level iron separation equipment. The first-level iron separation equipment comprises a first-level swirler, a ball grinding mill, a magnetic separator and a first translational oval separator. The second-level iron separation equipment comprises a second-level swirler and a second translational oval separator. Each of the first-level swirler and the second-level swirler comprises a feed port, an overflow port and an underflow port. The feed port of the slurry pump is connected with a slurry pump suction pipe, and the discharge port of the slurry pump is connected with the feed port of the first-level swirler through a feed input pipe of the first-level swirler, the underflow port of the first-level swirler is communicated with the feed port of the ball grinding mill, and the overflow port of the first-level swirler is connected with the feed port of the second-level swirler through a feed input pipe of the second-level swirler. The invention further discloses an efficient iron separation process adopting the gravity separation method for the red mud. The process comprises the steps of separating iron step by step through the system. According to the invention, the magnetic iron can be efficiently recovered, and the grade of 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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