Anshan type lean magnetite underground ore dressing and filling method

Abstract

The invention discloses an Anshan type lean magnetite underground ore dressing and filling method, comprising the following steps of: 1) sequentially crushing the raw ore from a stope by a jaw crusher in advance, wherein the ore discharge granularity is required to be not larger than 200mm, crushing the crushed products in a hydraulic cone crusher, screening the crushed products, returning the oversize products of which the product grain sizes are larger than 40mm back to the hydraulic cone crusher to be crushed again, screening the crushed products, and returning the oversize products of which the product grain size are larger than 40mm back to the hydraulic cone crusher to be crushed again; and 2) screening the valuable minerals which are separated in a scattering way, returning the oversize products back to a primary high-pressure roller mill to be crushed, crushing the undersize products of which the product grain size are less than 12mm in a secondary high pressure roller mill, and carrying out wet screening on the crushed products. According to the method, the ore dressing technological process of the mine are carried out underground and the filling station are built underground, and the method directly carries out the ore dressing on the exploited raw mine and fills a gob on the spot.

Description

technical field [0001] The invention mainly relates to a method for harmless mining and utilization of magnetic iron mines, in particular to an Anshan type lean magnetite underground mineral processing and filling method. Background technique [0002] The beneficiation and filling process is an important part of mine construction. The traditional beneficiation and filling processes are all built on the surface and occupy a large area. The waste water, waste gas and waste residue produced in the production process have serious environmental pollution. Some It even causes secondary pollution to the environment, which is not conducive to environmental governance; on the other hand, because the raw ore needs to be lifted to the surface to be broken and sorted, the ore is always reprinted and hoarded on the ground, which not only consumes a lot of energy and time but also brings A series of new problems restricting the development of mines. Contents of the invention [0003] T...

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Problems solved by technology

[0002] The beneficiation and filling process is an important part of mine construction. The traditional beneficiation and filling processes are all built on the surface and occupy a large area. The waste water, waste gas and waste residue produced in the production process have serious environmental pollution. Some It even causes secondary pollution to the environment, which is not conducive to environmental governance; on the other hand, because the raw ore needs to be lifted to the surface to be broken and sorted, the ore is always reprinted and hoarded on the ground, which not only consumes a lot of energy and time but also brings A series of new problems restricting mine development