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Low-grade gold ore separation and tailing-free utilization process

A low-grade, gold ore technology, applied in sorting, solid separation, grain processing, etc., can solve the problems of unreasonable crushing and grading process, low sorting efficiency, and difficult production practice, so as to reduce the amount of system compliance and improve the total Recovery rate and production cost reduction effect

Active Publication Date: 2021-09-17
河南省岩石矿物测试中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this technology is that the sorting effect of the X-ray sorting machine is not good. This sorting method recovers the ores whose quantitative analysis results of elements are higher than the set value. The grade difference between the ore and the ore whose measured value is lower than the set value is not large, the enrichment ratio of gold-rich ore is low, and the separation efficiency is low; in addition, the crushing and grading process of this patent is not reasonable enough, the overall process investment is large, and the economic benefit is poor. Difficult to produce in practice

Method used

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  • Low-grade gold ore separation and tailing-free utilization process
  • Low-grade gold ore separation and tailing-free utilization process
  • Low-grade gold ore separation and tailing-free utilization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Experimental study on gold waste rock in a certain place

[0074] Such as Figure 5 In the example of the closed-circuit process for re-crushing of light-separated concentrate, raw ore is roughly crushed to obtain products of about 0-120mm in size, and the content of fine-grained grades is relatively small;

[0075] Obtain rough concentrate and rough tailings through a stage of light separation;

[0076] The coarse concentrate passes through the 10mm sieve after medium and fine crushing, and the product on the sieve passes through the second stage of optical separation; the second stage of optical separation concentrate is the final concentrate, and enters the grinding and gravity separation system; the second stage of optical separation concentrate is returned to the medium and fine crushing, and the second stage of optical separation tailings is tailings 1; The particle size of tailings 1 is above 10mm;

[0077] Coarse tailings pass through a 30mm sieve after enteri...

Embodiment 2

[0089] Technical renovation of crushing system in a gold beneficiation plant

[0090] Such as Figure 9 As shown, the raw ore enters the coarse sieve after coarse crushing, the product on the sieve enters the medium crushing, the medium crushing product enters the fine sieve, the product on the fine sieve enters the fine crushing, and the fine crushing product returns to the fine sieve; the fine sieve and the coarse sieve Combined into crushed products.

[0091] The mining enterprise has a large stockpile of gold waste rocks. In order to be able to recycle and treat this solid waste without tailings, the process is transformed. The process flow chart after transformation is as follows Figure 10 Shown:

[0092] The raw ore enters the 10mm coarse screen after coarse crushing, the product on the screen enters the medium crushing, the medium crushing product enters the fine screen, and the product on the fine screen enters the optical separation; the optical separation tailings...

Embodiment 3

[0097] Intelligent photoselection test of gold waste rock in a certain area

[0098] In a gold mine, a survey was carried out, and three types of waste rocks, high-grade waste rock, medium-grade waste rock, and low-grade waste rock were collected, and intelligent optical separation tests were carried out respectively.

[0099] , rough selection test

[0100] In this test, high-grade, medium-grade and low-grade ores were used for intelligent sorting machine sorting. The test results are shown in Tables 4-6.

[0101] Table 4 Separation test of high-grade gold waste rock

[0102]

[0103] Grade gold waste rock sorting test in Table 5

[0104]

[0105] Table 6 Separation test of low-grade gold waste rock

[0106]

[0107] It can be seen from the above table that there are certain differences in the sorting indicators of gold waste rocks of different grades. Generally, as the grade of gold waste rocks decreases, the total recovery rate also decreases.

[0108] , fine s...

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Abstract

The invention discloses a low-grade gold ore separation and tailing-free utilization process. The process comprises the following steps of: 1, an intelligent light separation and crushing grading combined treatment working procedure; 2, a working procedure of enabling rough concentrates obtained in the first step to enter a gravity flotation separation process; and 3, a working procedure of manufacturing tailings in different stages into building material products with different specifications. The problems of high development cost and low product benefit of low-grade gold ore are solved; gold ore products and different types of building material products are produced; different market requirements are met; a low-grade gold ore separation system of an intelligent light separation machine is developed based on ore characteristics; compared with a traditional light separation machine, the light separation machine loaded with the system is higher in separation accuracy; compared with traditional open circuit arrangement, the multiple combined closed circuit arrangement of the light separation machine, a crushing machine and a screening machine can adapt to different process requirements and obtain more excellent separation indexes, the function of replacing multiple traditional light separation machines with one light separation machine can also be achieved, and equipment investment is saved; and the crushing process is closer to the crushing process adopted by a current separation plant, and production and transformation are easy to carry out.

Description

technical field [0001] The invention relates to the field of ore separation, in particular to a low-grade gold ore separation and tailless utilization process, and can also be used for the separation of other low-grade metal ores. Background technique [0002] With the development of society, especially the advancement of science and technology, it has greatly promoted the rapid development of social productivity, especially made outstanding contributions to the improvement of the efficiency of excavation and excavation in the traditional resource excavation industry. However, as the mining and excavation of many renewable ores, how to carry out fine sorting and make full use of them reasonably puts forward higher and higher requirements for the deep processing of ores. [0003] During the mining (stripping) operation of gold mines, a large amount of low-grade ore is produced. This part of ore is mainly composed of surrounding rock and interlayer rock, and its gold grade is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B07C5/342B02C21/00
CPCB03B9/00B02C21/00B07C5/3425
Inventor 王誉树张金矿路德富孙景敏豆靖林杨宁李志伟李荣改黄业豪李翠芬张虹张雨田张建乐王军赵一星
Owner 河南省岩石矿物测试中心
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