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Mineral benefication method for specularite

A beneficiation method and mirror iron ore technology, which are applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of high equipment investment, large ore volume, large investment, etc., and achieve simple process structure and low production cost. , the effect of low investment cost

Active Publication Date: 2012-10-10
CHANGSHA RES INST OF MINING & METALLURGY
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AI Technical Summary

Problems solved by technology

Method ① is a traditional iron ore beneficiation method with simple process structure and easy operation and management, but it has disadvantages such as high equipment investment, high operating cost, and difficulty in dehydration and filtration of concentrate; Part of the concentrate can be obtained, which reduces the amount of ore entering the flotation process. However, the investment in the strong magnetic separation equipment is large, and the specular iron minerals that have been dissociated in the rough grinding condition cannot be effectively separated, resulting in the first stage of strong The grade of magnetic tailings is relatively high, the amount of ore entering the second stage mill is large, and the iron ore is over-grinded, etc.

Method used

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  • Mineral benefication method for specularite
  • Mineral benefication method for specularite

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1 is the result of industrial production in a certain mine. The iron minerals in the ore extracted from this mine are mainly specularite and pseudohematite, and a small amount of limonite is occasionally seen; the gangue minerals are mainly quartz, followed by chlorite, sericite, muscovite and calcite, and other trace amounts Minerals include zircon, apatite, titanite and pyrite, etc. The raw ore grade is 31.17%, the iron silicate content is about 5%, and the magnetite accounts for about 1% of the total iron. figure 1 The principle process, the steps are as follows:

[0023] (1) After the raw ore is subjected to the first section of coarse grinding (grinding fineness -200 mesh accounts for 55%), the first section of 2-stage spiral chute sorting is directly carried out to obtain iron concentrate with a yield of 20.60 and a grade of 66.52%. The recovery rate of iron is 46.18%;

[0024] (2) After the tailings in the first section of the spiral chute are subjec...

Embodiment 2

[0031] The iron minerals in a mine are mainly magnetite and specularite and a small amount of semi-pseudo-false hematite and limonite; the gangue minerals are mainly quartz, followed by biotite, muscovite, actinolite, and tremolite Other trace minerals are zircon, apatite and sphene, among which the iron silicate content is 10.59%. The raw ore grade is 29.47%, and the magnetite content accounts for about 40% of the total iron. figure 2 The principle process (but the second section of spiral chute sorting is not carried out), the specific sorting steps are as follows:

[0032] (1) After the raw ore is subjected to the first stage of coarse grinding (grinding fineness -200 mesh accounts for 51.6%), it is firstly subjected to two weak magnetic separations, one coarse and one fine, to obtain a weak magnet with a yield of 18.58% and a grade of 67.54% Concentrate, iron recovery rate 42.58%;

[0033] (2) the weak magnetic tailings of (1) step gained enters two-stage spiral chute s...

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Abstract

The invention relates to a mineral benefication method for specularite, comprising recycling the iron ore concentrate in the specularite by first-stage coarse grinding, spiral chute sorting, low-intensity magnetic separating, high-intensity magnetic separating, second-stage ore-grinding, spiral chute sorting, high-intensity magnetic separating and reverse flotation separating process, or first-stage coarse grinding, low-intensity magnetic separating, spiral chute sorting, high-intensity magnetic separating, second-stage ore-grinding, spiral chute sorting, high-intensity magnetic separating and reverse flotation separating process. The method has the characteristics of simple process and structure, low investment cost, low production cost, economy and environment protection, and strong flexibility; when the mineral property changes, the iron minerals are sorted and recycled by properly regulating the method.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation technology, and relates to a beneficiation method of specularite. Background technique [0002] my country's iron and steel industry has developed rapidly in the past ten years, so the demand for iron ore resources is increasing. my country has identified iron ore resource reserves of 60.7 billion tons, and the estimated unidentified resources are more than 100 billion tons. Moreover, there are few rich iron ores and many lean ores. 97% of the iron ore is low-grade iron ore with TFe30% or less. ore selection. A large specular iron deposit was discovered in Huoqiu County, Lu'an City, Anhui Province, with a preliminary proven reserve of more than 2 billion tons. At present, the methods of mineral processing of specularite mainly include: ①Continuous grinding, weak magnetic-strong magnetic-anion reverse flotation process. ② Coarse grinding - strong magnetic separation tailings - regr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B1/00B03C1/00B03B5/62B03D1/00
Inventor 石云良刘忠荣刘苗华肖金雄
Owner CHANGSHA RES INST OF MINING & METALLURGY
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