Magnetite beneficiation method

Abstract

The invention relates to the field of beneficiation, in particular to a magnetite beneficiation method. Through technological closed cycle production, technological path is shortened, and production and transport costs are remarkably saved; energy is saved by 0.5-1 degree / ton; plant construction area is reduced; building of tailings ponds is reduced due to dry discarding. By the beneficiation method, large-scale tailings discarding before milling is realized, milling grade is remarkably improved, and technical parameters of ball-milling magnetic separation sections are changed thoroughly. The magnetic-gravitational beneficiation process can be applied to preconcentration of low-grade ore, ore resources are pre-concentrated, the milling grade is improved, and beneficiation cost is reduced; the magnetic-gravitational beneficiation process can also be applied to recleaning of tailings to recover the tailings relatively concentrated on dry slope sections of tailings dams; the magnetic-gravitational beneficiation process can be further applied to powdered iron purification of dressing plants to discard lean intergrowth and gangue in powdered iron, product grade is improved, and technical additional value of products of the dressing plants is increased. The magnetic-gravitational beneficiation process substitutes for the wet-type magnetic separation process and is a qualitative leap for dry-type preconcentration and tailings discarding of beneficiation of mines.

Description

technical field [0001] The invention relates to the mineral processing field, in particular to a magnetite mineral processing method. Background technique [0002] Compared with the global iron ore resources, my country has a large number of low-grade iron ore mineral resources. In recent years, in order to make full use of the existing low-grade magnetite mineral resources in China to make up for the shortage of domestic iron ore resources, Domestic enterprises have been involved in the development process of low-grade magnetite mineral resources. [0003] Since the development of low-grade magnetite mineral resources firstly adopts large-scale open-pit mining and new beneficiation technology and process combination, and uses large-scale and new technology benefits to solve low-grade magnetite, it is difficult to obtain better ore with low added value. This is an important means and measure to transfer low-grade magnetite mineral resources to the development link. At prese...

AI Technical Summary

Problems solved by technology

However, in terms of beneficiation process, it is far from being able to adapt to the beneficiation process conditions of this type of low-grade magnetite mine; in order to meet the beneficiation process technical requirements of this type of magnetite development

[0005] The separation effect of the domestic magnetite powder ore separation equipment is not ideal. Due to the magnetic agglomeration, wrapping, adhesion and other reasons of the magnetite powder ore, the enrichment ratio of the magnetite powder ore separation is low, and the separation accuracy is low. The ore grade is limited, the amount of tailings is small, the grade of magnetic iron in the tailings is high, and the loss of metallic iron is serious

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