Sorting method for anshan-type lean iron ores

An iron ore, Anshan-style technology, applied in the separation of Anshan-style lean iron ore, can solve the problems of difficulty in ore development, low magnetic field strength, fluctuation of ore properties, etc., to reduce fixed investment and operating costs, improve The effect of beneficiation recovery rate and production cost reduction

Active Publication Date: 2016-01-13
ANSTEEL GRP MINING CO LTD
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  • Abstract
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Problems solved by technology

[0007] (3) Because the thickness of the ore layer and interlayer in the ore deposit changes from time to time, the properties of the ore often fluctuate, and the size of the embedded iron minerals is uneven, which also brings certain difficulties to the development of this type of ore
However, there is an obvious problem in this process, that is, due to the low intensity of the magnetic field in the sweep, the fine-grained iron minerals that have been dissociated in the feed cannot be effectively recovered, so that their content in the tailings is too high. It not only increases the separation cost of Anshan type lean iron ore, but also causes a waste of resources

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  • Sorting method for anshan-type lean iron ores

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Embodiment 1

[0026] The specific flow process of the sorting method of the Anshan type lean iron ore of the present embodiment is as follows figure 1 shown, and follow these steps:

[0027] (1) Send the raw ore of Qidashan Iron Mine into a closed-circuit grinding system to obtain raw ore powder with a particle size of -0.074mm accounting for 58.17% of the total weight;

[0028] (2) Send the raw ore powder into the hydrocyclone for coarse and fine classification, the grading particle size is 36 μm, the overflow yield rate of the hydrocyclone is 41.63%, and the underflow is fed into the spiral concentrator for rough separation, and the rough separation is obtained Concentrated ore, rough ore and rough beneficiation tailings, the rough beneficiation concentrate is sent to the spiral concentrator and then be beneficiated, and the beneficiation will be the beneficiation concentrate, the beneficiation middle ore and the beneficiation tailings, the concentrate Concentrated ore is gravity-concent...

Embodiment 2

[0033] The specific flow process of the sorting method of the Anshan type lean iron ore of the present embodiment is as follows figure 1 shown, and follow these steps:

[0034] (1) Send the raw ore of Qidashan Iron Mine into a closed-circuit grinding system to obtain raw ore powder with a particle size of -0.074mm accounting for 58.17% of the total weight;

[0035] (2) Send the raw ore powder into the hydrocyclone for coarse and fine classification, the grading particle size is 25μm, the overflow yield rate of the hydrocyclone is 33.61%, and the underflow is fed into the spiral concentrator for rough separation, and the coarse separation is obtained Concentrated ore, rough ore and rough beneficiation tailings, the rough beneficiation concentrate is sent to the spiral concentrator for beneficiation, and the beneficiation is concentrated to obtain the beneficiation concentrate, the beneficiation medium ore and the beneficiation tailings, the concentrate Concentrated ore is grav...

Embodiment 3

[0040] The specific flow process of the sorting method of the Anshan type lean iron ore of the present embodiment is as follows figure 1 shown, and follow these steps:

[0041] (1) Send the raw ore of Qidashan Iron Mine into a closed-circuit grinding system to obtain raw ore powder with a particle size of -0.074mm accounting for 59.2% of the total weight;

[0042] (2) Send the raw ore powder into the hydrocyclone for coarse and fine classification, the grading particle size is 20 μm, the overflow yield rate of the hydrocyclone is 21.72%, and the underflow is fed into the spiral concentrator for rough separation, and the coarse separation is obtained Concentrated ore, rough ore and rough beneficiation tailings, the rough beneficiation concentrate is sent to the spiral concentrator and then be beneficiated, and the beneficiation will be the beneficiation concentrate, the beneficiation middle ore and the beneficiation tailings, the concentrate Concentrated ore is gravity-concent...

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Abstract

The invention belongs to the technical field of mineral processing engineering, and particularly relates to a sorting method for anshan-type lean iron ores. The sorting method comprises the following steps: concentrating and roughing to obtain concentrated concentrate which is gravity concentrate; carrying out low-intensity magnetic separation and high-intensity magnetic separation on rougher tailings and effusion with coarse and fine particle fractions; then, carrying out reverse flotation roughing on the concentrate which is respectively subjected to low-intensity magnetic separation and high-intensity magnetic separation; and then, carrying out reverse flotation concentration on the reverse flotation rougher concentrate which is obtained by reverse flotation roughing, wherein the obtained reverse flotation concentrated concentrate and the gravity concentrate are used as total concentrate; the iron grade of the total concentrate is 68-69%, and the iron recovery rate is 83-86%. The sorting method is used for sorting iron minerals in the anshan-type lean iron ores with low cost and a high recovery rate.

Description

technical field [0001] The invention belongs to the technical field of mineral processing engineering, and in particular relates to a sorting method of Anshan type lean iron ore. Background technique [0002] Among the proven iron ore resources in my country, weakly magnetic iron ore accounts for about 65% of the total iron ore, and Anshan-type lean iron ore accounts for more than half of weakly magnetic iron ore resources, which is the main iron ore resource in my country. one. In the current severe situation of the global steel industry, it is particularly important to strengthen the separation and utilization of Anshan-style lean iron ore. [0003] Anshan-type lean iron ore is mostly fine-grained and impregnated high-silicon lean iron ore, generally containing about 30% iron and 40% to 50% silicon dioxide. The main metal minerals are magnetite, pseudo (or semi-pseudo) hematite, hematite, sometimes with a small amount of limonite, specularite, siderite, etc.; gangue miner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 张国庆崔宝玉李传林陆占国张金峰陈本红任梦真
Owner ANSTEEL GRP MINING CO LTD
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