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Concentrating and dry stacking method of iron tailing slurry

A technology for iron tailings and dry stacking is applied in the field of mine safety to achieve the effects of improving dehydration efficiency, reducing power consumption and low water content

Inactive Publication Date: 2012-07-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009]The purpose of the present invention is to provide a production method specially for the concentration and dry stacking of iron tailings, so as to solve the problems of safe storage of iron tailings and efficient reuse of water resources The problem

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  • Concentrating and dry stacking method of iron tailing slurry
  • Concentrating and dry stacking method of iron tailing slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: as figure 1 As shown, the specific steps of the iron tailings slurry concentration and dry stacking method are as follows:

[0025] (1) Preparation of composite admixture: Iron and steel metallurgical slag, chemical waste gypsum and quicklime are the main components

[0026] The carrier made of raw materials and the activator composed of aluminum sulfate, ferric chloride, and polyferric aluminum sulfate are mixed and configured at a weight ratio of 100:0.6, and then the mixture is dried, crushed, and dry-milled to pass 0.08 ㎜ sieve to the powder with a balance of less than 5% is the composite admixture; (the composition of the carrier is 70wt% of iron and steel metallurgical slag, 15wt% of chemical waste gypsum, and 15wt% of quicklime, and the iron and steel metallurgical slag is a mixture of steel slag and blast furnace water slag , the weight ratio is steel slag:blast furnace water slag=1:0.5. The composition of the activator is 20wt% aluminum sulfate,...

Embodiment 2

[0030] Embodiment 2: as figure 1 As shown, the specific steps of the iron tailings slurry concentration and dry stacking method are as follows:

[0031] (1) Preparation of composite admixture: Iron and steel metallurgical slag, chemical waste gypsum and quicklime are the main components

[0032] The carrier made of raw materials and the activator composed of aluminum sulfate, ferric chloride, and polyferric aluminum sulfate are mixed and configured at a weight ratio of 100:3, and then the mixture is dried, crushed, and dry-milled to pass 0.08 ㎜ sieve to the powder with a balance of less than 5% is the composite admixture; (the composition of the carrier is 75wt% of iron and steel metallurgical slag, 12wt% of chemical waste gypsum, and 13wt% of quicklime, and the iron and steel metallurgical slag is a mixture of steel slag and blast furnace water slag , and its weight ratio is steel slag:blast furnace water slag=1:1. The composition of the activator is 30wt% aluminum sulfate,...

Embodiment 3

[0036] Embodiment 3: as figure 1 As shown, the specific steps of the iron tailings slurry concentration and dry stacking method are as follows:

[0037] (1) Preparation of composite admixture: Iron and steel metallurgical slag, chemical waste gypsum and quicklime are the main components

[0038] The carrier made of raw materials and the activator composed of aluminum sulfate, ferric chloride, and polyferric aluminum sulfate are mixed according to a weight ratio of 100: 5.0, and then the mixture is dried, crushed, and dry-milled to pass 0.08 ㎜ sieve to the powder with a balance of less than 5% is the composite admixture; (the composition of the carrier is 80wt% iron and steel metallurgical slag, 10wt% chemical waste gypsum, 10wt% quicklime, and the iron and steel metallurgical slag is a mixture of steel slag and blast furnace water slag , and its weight ratio is steel slag: blast furnace water slag=1: 2.0. The composition of the activator is aluminum sulfate 40wt%, ferric chl...

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Abstract

The invention relates to a concentrating and dry stacking method of iron tailing slurry, which belongs to the technical field of security, and is characterized in that: after being added with 0.5 to 3.0% (relative to weight% of dry tailing dry basis) of composite additive, low-concentration tailing slurry is concentrated, pressure-filtered and dryingly stacked. Compared with the prior art, the concentration and pressure filtration efficiencies of the low-concentration tailing slurry are obviously improved, the water quality is improved, and the security in the stacking process of tailings is improved. The method is a novel dry stacking method of iron tailings.

Description

Technical field: [0001] The invention relates to a method for concentrating iron tailings slurry and dry stacking, and belongs to the technical field of mine safety. Background technique: [0002] After crushing, ball milling, and wet beneficiation of iron ore, it will produce low-grade high-water content waste slag mainly composed of silicate minerals, which accounts for more than 50% of the original ore. This waste slag is called iron tailings. Due to the fine particles of iron tailings, strong water holding capacity and high moisture content, there are problems of low dehydration efficiency and unsafe storage. [0003] At present, the tailings concentration and stockpiling methods in my country are as follows: [0004] The first is reservoir dam storage: the method is to first build a dam with sand and fill it with tailings ore slurry. The slurry gradually settles during the storage process, and clean water is discharged through the backwater well at the end of the res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 张召述罗中秋夏举佩伍祥李淑兰
Owner KUNMING UNIV OF SCI & TECH
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