Mineral processing technology of hematite containing chlorite

A mudstone hematite and iron ore technology, which is applied in the beneficiation process of chlorite-containing hematite, can solve the problems of lower recovery rate, easy mudification and separation of chlorite, so as to eliminate the influence of the surrounding environment and improve the separation process. Indicators, the effect of concentrate grade improvement

Inactive Publication Date: 2012-09-19
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current conventional beneficiation process flow is as follows: figure 1 As shown, stage grinding, coarse and fine grading, coarse gravity separation, fine-grained weak magnetic concentration-strong magnetic tailing-reverse flotation process are adopted in sequence. The main reason for the unsatisfactory selection index of this process is that the chlorite is weak As a magnetic mineral, strong magnetism cannot separate it from hematite, and chlorite is easy to muddy. It covers the surface of hematite during the flotation process. If it enters the foam layer, the recovery rate will be reduced. If it stays in the flotation The selection tank also affects the concentrate grade

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  • Mineral processing technology of hematite containing chlorite
  • Mineral processing technology of hematite containing chlorite
  • Mineral processing technology of hematite containing chlorite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: as figure 2 As shown, the beneficiation process of this chlorite-containing hematite adopts the following process steps.

[0025] Raw material: select the ore mined by Sijiaying. Among them, the useful minerals are mainly hematite, half-false hematite, magnetite and a small amount of limonite, with an iron grade of 36.71%; the muddy gangue minerals are mainly chlorite, mica, calcite, hornblende, From stone, etc., iron silicate accounts for about 1.42% of the total iron.

[0026] Process steps: (1) Stage grinding: grind the above-mentioned ore by ball mill, wherein the first stage of grinding fineness -200 mesh accounts for 50-65wt%, and the second stage of grinding to -200 mesh accounts for more than 90wt%; then Classification is carried out through the cyclone group; the classified grit returns to the ball mill for grinding again, and the classified overflow enters the coarse and fine classification process;

[0027] (2) Coarse and fine classification...

Embodiment 2

[0033] Embodiment 2: The beneficiation process of this chlorite-containing hematite adopts the following process steps.

[0034] Raw material: The ore mined from Yanshan Iron Mine is selected. Among them, the useful minerals are mainly hematite, half-false hematite, magnetite and a small amount of limonite, with an iron grade of 36.41%; the muddy gangue minerals are mainly chlorite, mica, calcite, hornblende, and Starting stone, etc., iron silicate.

[0035] Process step is with embodiment 1. The classification index of this embodiment is shown in Table 2.

[0036]

Embodiment 3

[0037] Embodiment 3: The beneficiation process of this chlorite-containing hematite adopts the following process steps.

[0038] Raw material: The ore extracted from the Sijiaying surface mine is selected. Among them, the useful minerals are mainly hematite, pseudo-semi-pseudo-hematite, magnetite and a small amount of limonite, with an iron grade of 36.68%; the muddy gangue minerals are mainly chlorite, mica, calcite, hornblende, Starting stone, etc., iron silicate.

[0039] Process step is with embodiment 1. The sorting index of this embodiment is shown in Table 3; the sorting index of the original process of Sijiaying reverse flotation is shown in Table 4.

[0040]

[0041]

[0042] From the sorting indexes obtained in Examples 1-3, it can be seen that this mineral processing process can improve the concentrate grade by 2 to 3 percentage points, and increase the recovery rate by 3 to 5 percentage points.

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Abstract

The invention discloses a mineral processing technology of hematite containing chlorite, which comprises the processes of stage grinding, classification of crudeness and fineness, gravity separation of coarse grains, magnet weakening of small particles to obtain essence, strong magnet separation and flotation, and the process of flotation and classification is arranged between the strong magnet separation and flotation; the flotation and classification is to classify the flotation feedings, and a second flotation is respectively carried out for classified coarse grains and small particles. According to the technology, a classified flotation is creatively proposed, i.e. the classification of crudeness and fineness is carried out for the flotation feedings, the affect to flotation caused by small particles of gangue minerals can be effectively eliminated, and the separation index is increased. According to the technology, the defect of the flotation index deterioration by chlorite is overcome, low-graded hematite containing argillaceous gangue minerals can be effectively utilized, the theoretical and practical basis is provided for the separation and the flotation of hematite containing chlorite, and the affect to surrounding environment by store-up minerals is eliminated.

Description

technical field [0001] The invention relates to a beneficiation process, in particular to a beneficiation process of chlorite-containing hematite. Background technique [0002] In recent years, the rapid development of my country's iron and steel industry and the continuous increase in steel output have led to a serious shortage of supply in the domestic iron ore market, and a sharp increase in iron ore imports. In order to ensure the healthy and sustainable development of my country's iron and steel industry, there is an urgent need for a stable, sufficient and high-quality supply of iron ore raw materials. In this regard, the national "Eleventh Five-Year Plan" clearly stated that "low-grade iron ore resources should be actively utilized", and the utilization of refractory iron ore is also imminent. Therefore, it is of great significance to study the development and utilization of complex refractory iron ore. [0003] As the representative of my country's lean ore, Anshan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 赵礼兵李富平张锦瑞李凤久王伟之贾清梅
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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