Sorting method for pre-enriching aggregate disseminated stibnite

A technology for distributing stibnite and aggregates, which is applied in the field of pre-enrichment of aggregates imbedded with stibnite, can solve the problem of unavoidable mixing of a large amount of surrounding rock or waste rock, low grade of antimony ore, and increased separation Other problems such as difficulty, to achieve the effect of saving mineral processing costs, not easy to slime, and reducing the amount of ore

Inactive Publication Date: 2021-09-03
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in order to improve the production capacity of antimony ore mining, more and more mines adopt intensified mining technology, and a large amount of surrounding rock or waste rock is inevitably mixed in during the mining process, making the selected grade of antimony ore lower
When a large amount of surrounding rock or waste rock enters the crushing and grinding system, the cost of crushing and grinding will be greatly increased, and the difficulty of sorting will be increased, resulting in poor beneficiation indicators

Method used

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  • Sorting method for pre-enriching aggregate disseminated stibnite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 A stibnite ore in Gansu Province has an antimony grade of 2.43%, and technological mineralogy research shows that the ore belongs to aggregate mosaic stibnite.

[0036] A sorting method for pre-enrichment of aggregate mosaic stibnite, comprising the following steps:

[0037] ⑴ Broken:

[0038] Put the aggregate-embedded stibnite raw ore into the three-stage and one-closed-circuit crushing process. First, the jaw crusher is used for two-stage coarse crushing to obtain coarse crushed products; then the coarse crushed products are screened by a 40mm vibrating screen to obtain The product on the vibrating screen and the product under the vibrating screen; the product on the vibrating screen is crushed by an impact crusher, and the crushed product is returned to the vibrating screen.

[0039] ⑵ Screening and desliming:

[0040] The product under the vibrating screen enters the desliming sieve with a mesh size of 6mm for screening and desliming to obtain the produ...

Embodiment 2

[0047] Example 2 A certain antimony ore in Hunan Province has an antimony grade of 1.96%. The ore is embedded in aggregates. At the same time, waste rocks accidentally fell into it during the mining process, resulting in a low grade of antimony ore.

[0048] A sorting method for the pre-enrichment of aggregate-embedded stibnite is the same as that in Example 1. Among them: the condition of dense medium separation means that the separation specific gravity is controlled at 2.67, the selected feed particle size is 6~40mm, the feed speed is 0.1~0.5m / s, and the separation speed is 0.11~0.26m / s. The heavy product with antimony recovery rate of 96.5% and the light product with yield of 50% were obtained by sorting.

Embodiment 3

[0049] Example 3 A stibnite in Guangxi has an antimony grade of 2.75%, and the ore is of aggregate embedded type.

[0050] A sorting method for the pre-enrichment of aggregate-embedded stibnite is the same as that in Example 1. Among them: the condition of dense medium separation means that the separation specific gravity is controlled at 2.64, the selected feed particle size is 6~40mm, the feed speed is 0.1~0.5m / s, and the separation speed is 0.11~0.26m / s. The antimony heavy product with a recovery rate of 94.6% and the light product with a yield of 48% were obtained by sorting.

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Abstract

The invention relates to a sorting method for pre-enriching aggregate disseminated stibnite. The sorting method comprises the following steps: (1) crushing: raw aggregate disseminated stibnite enters a three-section one-closed-loop ore crushing process to obtain an oversize product of a vibrating screen and an undersize product of the vibrating screen; (2) screening and desliming: screening and desliming the undersize product of the vibrating screen to obtain an oversize product and an undersize product; enabling the undersize products to enter fine crushing equipment; (3) dense medium separation: feeding the oversize product into a shallow slot type dense medium sorting machine for ore pre-sorting to obtain a heavy product and a light product; (4) medium drainage: enabling the heavy product and the light product to respectively enter a medium drainage screen for medium drainage; and (5) fine crushing: feeding the heavy product after medium drainage into fine crushing equipment, performing fine crushing together with the undersize product to obtain a fine-crushed product, feeding the fine-crushed product into an ore grinding and floating system, and starting the next process. The method has the advantages of being simple in technological process, high in waste rock throwing rate and high in useful ore recovery rate, the production capacity of a concentration plant can be improved, and beneficiation cost is saved.

Description

technical field [0001] The invention relates to the technical field of pre-enrichment of minerals, in particular to a sorting method for pre-enrichment of aggregate-embedded stibnite. Background technique [0002] With the continuous mining of antimony ore, rich ore resources are becoming exhausted day by day, and lean ore mining is increasing day by day. At the same time, in order to improve the production capacity of antimony ore mining, more and more mines adopt intensified mining technology, and a large amount of surrounding rock or waste rock is inevitably mixed in during the mining process, making the selected grade of antimony ore lower. When a large amount of surrounding rock or waste rock enters the crushing and grinding system, the cost of crushing and grinding will be greatly increased, and the difficulty of sorting will be increased, resulting in poor beneficiation indicators. Contents of the invention [0003] The technical problem to be solved by the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/00B02C21/00
CPCB03B7/00B03B9/00B02C21/00
Inventor 杨俊龙郭艳华柏亚林郭海宁苗梁王长征彭贵熊胡保拴李国栋陈杜娟何海涛
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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