High-yield two-product mixed maghemite beneficiation process

A high-yield, high-quality technology, applied in the field of hematite mixed iron ore beneficiation process, can solve the problem of low recovery of all iron, and achieve the effects of avoiding pollution, ensuring recovery rate, and ensuring quality

Inactive Publication Date: 2018-11-27
MCC NORTH (DALIAN) ENG TECH CO LTD
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Problems solved by technology

However, if coarse-grained ore grinding is directly used in the beneficiation process, the recovery of total iron will be too low due to insufficient dissociation of minerals, and most recovery rates will not exceed 50%.

Method used

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  • High-yield two-product mixed maghemite beneficiation process

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Embodiment Construction

[0023] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, a high-yield two-product hematite ore beneficiation process of the present invention includes that the iron grade is 41.8%, and the hematite with a slime content of 30% in the raw ore is subjected to coarse crushing, medium crushing and fine crushing The three-stage crushing, the raw ore and mineral types include hematite, false hematite, limonite, goethite and part of magnetite, is characterized in that it also includes the following steps: screening operation and a ball mill- A section of closed-circuit grinding operation composed of cyclone, primary magnetic separation operation, coarse and fine classification operation, gravity separation operation, secondary magnetic separation operation and centrifugation operation; the primary magnetic separation operation processes the overflow product and ...

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Abstract

The invention relates to a high-yield two-product mixed maghemite beneficiation process. The high-yield two-product mixed maghemite beneficiation process comprises three-section breakage including coarse breaking, medium breaking and fine breaking on mixed maghemite, and is characterized by further comprising the following steps: sieving operation, a one-section closed circuit grinding operation implemented by a one-section ball-milling-cyclone, primary beneficiation operation, coarse and fine classification operation, reselection operation, secondary magnetic separation operation and centrifuging operation; a primary magnetic separation operation sieve treats overflow products of one-section closed circuit grinding operation, sieving operation and undersizes, the coarse and fine classification operation treats bulk concentrate obtained by primary beneficiation, the reselection operation treats coarse grain products of the coarse and fine classification operation, the secondary beneficiation operation treats coarse particle products of the coarse and fine classification operation, and the centrifuging operation treats bulk concentrates of secondary weak magnetic separation. The high-yield two-product mixed maghemite beneficiation process has the advantages that iron ore concentrates I with grade being 62% for pelletizing raw materials and iron ore concentrates II with grade being 58% for sintered raw materials can be selected out.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, in particular to a hematite mixed iron ore beneficiation process with high yield and two products. Background technique [0002] At present, many mines, especially surface mines and transitional mines, have complex ore types due to different degrees of oxidation and hydration, mainly including hematite, false hematite, limonite, goethite and some magnetite ; Due to the long-term weathering and erosion during the mineralization process, minerals often contain a large amount of iron-bearing clay. The iron-bearing clay with fine particles and low grade of this kind of ore is often mixed in the fine-grained concentrate during fine grinding, resulting in low-grade fine-grained concentrate and affecting the quality of fine-grained concentrate. In particular, limonite and goethite, which are often hydrated in this kind of ore, have a large content. Because the molecular structure of this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 杨海龙李国洲
Owner MCC NORTH (DALIAN) ENG TECH CO LTD
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