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Method for refining fine iron powder by using low grade iron mine

A technology for low-grade iron ore and iron concentrate, which is applied in the field of refining iron concentrate, can solve the problems of depletion of iron ore resources, high beneficiation and mining costs, and achieve the effects of good selection ability, reduction of beneficiation and mining costs, and quality assurance.

Inactive Publication Date: 2014-04-23
LINGYUAN HUASHENG MINING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, iron ore with a magnetic iron grade above 4% can be beneficiated by a magnetic separator, and those below 4% will not be mined. With the increase of mining volume, iron ore resources are gradually exhausted, and the cost of beneficiation and mining is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. crush

[0022] Crush iron ore with a magnetic iron content of 2% to iron ore particles with a particle size of ≤8mm;

[0023] 2. Dry selection

[0024] Send iron ore particles with a particle size of ≤8mm into a magnetic separator, select a magnetic separator with a magnetic flux of 3800 gauss for dry separation, and control the magnetic iron content in the tailings to 0.7wt%;

[0025] 3. Ball milling

[0026] Use a ball mill to add water to the dry-selected iron ore particles for ball milling and pulverization to form a slurry. Use a grinding audio spectrometer to control the iron ore fineness in the slurry - 200 mesh accounts for 55%. During ball milling, use frequency conversion and constant pressure automatic water supply equipment to supply water Control the mass percent content of iron ore in the slurry to be 60%;

[0027] 4. Wet selection

[0028] Use a magnetic separator to carry out wet separation of the ball-milled slurry with a fineness of -200 mesh ac...

Embodiment 2

[0030] 1. crush

[0031] Crush iron ore with a magnetic iron content of 4% to iron ore particles with a particle size of ≤8mm;

[0032] 2. Dry selection

[0033] Feed iron ore particles with a particle size of ≤8mm into a magnetic separator, select a magnetic separator with a magnetic flux of 3500 gauss for dry separation, and control the magnetic iron content in the tailings to 0.6wt%;

[0034] 3. Ball milling

[0035] Use a ball mill to add water to the dry-selected iron ore particles for ball milling and pulverization to form a slurry. Use a grinding sound measuring instrument to control the iron ore fineness in the slurry - 200 mesh accounts for 65%. During ball milling, use frequency conversion and constant pressure automatic water supply equipment to supply water Control the mass percent content of iron ore in the slurry to be 70%;

[0036] 4. Wet selection

[0037] Use a magnetic separator to perform wet separation on the ball-milled slurry with a fineness of -200 m...

Embodiment 3

[0039] 1. crush

[0040] Crush iron ore with a magnetic iron content of 3% to iron ore particles with a particle size of ≤8mm;

[0041] 2. Dry selection

[0042] Feed iron ore particles with a particle size of ≤8mm into a magnetic separator, select a magnetic separator with a magnetic flux of 3500 gauss for dry separation, and control the magnetic iron content in the tailings to 0.6wt%;

[0043] 3. Ball milling

[0044] Use a ball mill to add water to the dry-selected iron ore particles for ball milling and pulverization to form a slurry. Use a grinding audio spectrometer to control the iron ore fineness in the slurry - 200 mesh accounts for 60%. During ball milling, use frequency conversion and constant pressure automatic water supply equipment to supply water Control the mass percent content of iron ore in the slurry to be 65%;

[0045] 4. Wet selection

[0046] Use a magnetic separator to carry out wet separation on the ball-milled slurry with a fineness of -200 mesh ac...

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PUM

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Abstract

The invention discloses a method for refining fine iron powder by using a low grade iron mine. The method comprises the following steps of crushing the iron ore the magnetic iron content of which is 2%-4% to obtain iron ore particles the particle sizes of which are less than or equal to 8mm, feeding the iron ore particles into a magnetic separator, performing dry separation by using the magnetic separator the magnetic flux of which is 3500 gausses-3800 gausses, feeding the water in the iron ore particles after dry separation by adopting a ball mill, carrying out ball-milling smash on the iron ore particles to form a sizing agent, carrying out wet separation on the 55 %-65 % of sizing agent which has the ball-milling fineness of -200 meshes by using the magnetic separator, carrying out wet separation by using the magnetic separator the magnetic flux of which is 1600 gausses-1800 gausses, pumping by using a vacuum pump, and enabling the water content of the iron ore sizing agent to be 8%-9% to obtain the fine iron powder the grade of which is 65%-67%. The method disclosed by the invention has the advantages that magnetic separation can be carried out on the iron ore the magnetic iron content of which is 2%-4%, the mineral separation cost and the production cost are reduced, an iron ore resource is fully utilized, and the grade of a product is guaranteed through the strict iron ore fineness and magnetic flux.

Description

technical field [0001] The invention relates to a method for extracting fine iron powder from low-grade iron ore. Background technique [0002] Iron concentrate powder is the iron ore powder that has been beneficiated. There are many kinds of iron ore, and magnetite is one of them through magnetic separation. After beneficiation, it can produce concentrate powder with an iron content of more than 60%. At present, iron ore with a magnetic iron grade of more than 4% can be beneficiated by a magnetic separator, and less than 4% will not be mined. With the increase of mining volume, iron ore resources are gradually exhausted, and the cost of beneficiation and mining is high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for refining iron concentrate powder by using low-grade iron ore, which can reduce the cost of beneficiation and mining, make full use of iron ore mineral resources, and save energy. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B03B7/00
Inventor 唐贵福张国祥
Owner LINGYUAN HUASHENG MINING IND CO LTD
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