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Iron separating method for metamorphic iron tailings

A technology for iron tailings and iron separation, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve problems such as land occupation, waste of resources, environmental pollution, etc. simple effect

Inactive Publication Date: 2015-12-09
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The treatment of tailings in metal mines is an urgent problem in all countries in the world. At present, most of the tailings in my country have not been comprehensively utilized, and the comprehensive utilization rate is less than 10%.
[0007] In short, the utilization rate of metamorphic iron tailings is low. Only a few mining enterprises partially recycle mFe, or use coarse-grained tailings to make bricks. Most of the soluble iron has not yet been recovered by an effective method. It is also not utilized, not only occupying land, polluting the environment, but also wasting resources

Method used

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  • Iron separating method for metamorphic iron tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 1000g of metamorphic iron tailings in Liaoning and sieve < 2mm, add 40g / t sodium silicate and 5g / t sodium chloride in sequence, grind to -0.074mm magnetic separation, magnetic separation mFe, magnetic separation tailings to adjust ore slurry to 20%, then add 25g / t sodium carbonate and 40g / t non-polar oil in sequence, stir for 3.5min, enter the flotation tank, add oleic acid 80g / t, roughen for 5.5min, sweep once for 5min, and sweep twice 4.5 minutes, 5 minutes for the first selection, and 3 minutes for the second selection. The obtained iron ore concentrate has a grade of 59.9% and a recovery rate of 90%.

Embodiment 2

[0038] Take 1000g of a metamorphic iron tailings in Hebei that is screened <2mm, add 30g / t sodium silicate and 8g / t sodium chloride in sequence, grind to -0.074mm, magnetically separate mFe, and adjust the slurry to 20 %, sequentially add sodium carbonate 30g / t, non-extreme oily oil 30g / t, stir for 4.5min, enter the flotation tank, add oleic acid 100g / t, roughing for 5.5min, first sweeping for 5min, second sweeping for 4.5min, The first beneficiation is 4 minutes, and the second beneficiation is 3 minutes, the grade of iron concentrate is 60.8%, and the recovery rate is 90.06%.

Embodiment 3

[0040] Take 1000g of metamorphic iron tailings in Jilin that are screened <2mm, add 45g / t sodium silicate and 10g / t sodium chloride in sequence, grind to -0.074mm, magnetically separate mFe, and adjust the slurry to 20 %, add sodium carbonate 30g / t, non-polar oil 50g / t in turn, stir for 4 minutes, enter the flotation tank, add oleic acid 105g / t, sweep for 5 minutes once, sweep twice for 4.5 minutes, and refine for 4 minutes once, The secondary concentration was carried out for 3 minutes, and the grade of iron concentrate was 62.9%, and the recovery rate was 150%.

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Abstract

The invention relates to an iron separating method for metamorphic iron tailings. According to magnetite, hematite, maghemite, goethite and limonite in the metamorphic iron tailings, the magnetic separation-flotation technology is adopted, and primary roughing, secondary scavenging and secondary concentration are carried out. By the adoption of the method, the problems that the iron separating recovery rate of the iron tailings is low and the recovery cost is high in all metamorphic iron tailing production countries for a long time are solved. Compared with the prior art, the method is free of pollution, capable of recovering soluble iron at a low cost, short in technological process, simple in technology, high in recovery rate, low in recovery cost and suitable for industrial production.

Description

Technical field: [0001] The invention relates to tailings re-selection, which is one of the comprehensive utilization of metal ore tailings, in particular to a method for selecting iron from metamorphic iron tailings. Background technique: [0002] Mineral resources are an important material basis for human survival and development. Iron is the metal that was first discovered in the world, the most widely used, and the most used. Its consumption accounts for about 95% of the total metal consumption. With the rapid development of iron ore resources What is most important is the continuous and high-speed accumulation of iron tailings. In 2010, the "Special Plan for the Comprehensive Utilization of Metal Tailings (2010-2015)" jointly issued by four ministries and commissions including the Ministry of Industry, Information Technology and Information Technology listed the comprehensive utilization of iron tailings in the three The first of the key research areas. [0003] At pre...

Claims

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Application Information

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IPC IPC(8): B03B9/06B03B7/00C22B1/00
CPCY02W30/52
Inventor 张佳楠孙丰月王力张渊
Owner JILIN UNIV
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