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A kind of flotation recovery method of high-calcium-magnesium-high-shale mixed lead-zinc ore

A recovery method, high calcium and magnesium technology, applied in flotation, recycling technology, mechanical material recovery, etc., can solve the problems of rich viscosity of flotation foam, high pH value of mineral processing backwater, low recovery rate of zinc oxide, etc., to achieve Save the cost of chemicals, improve the recovery rate and resource utilization rate, and avoid the effect of low recovery rate of zinc oxide

Active Publication Date: 2022-06-03
CHINA MINMETALS CHANGSHA MINING RES INST
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  • Claims
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Problems solved by technology

[0004] However, the above-mentioned existing high-calcium-magnesium-high-mud mixed lead-zinc ore beneficiation technology has the following problems: 1) a large amount of lime is added to the flotation of lead sulfide, and the whole flotation process is carried out in a high alkalinity environment with pH=11. Zinc oxide flotation requires an environment with a pH of about 9 to 10, so 1 to 2 kg / t of ammonium bicarbonate needs to be added to adjust the pH value before zinc oxide flotation, resulting in high ammonia content in the dressing plant and harsh working environment; 2 ) Due to the addition of a large amount of lime, zinc sulfide is inhibited, and a large amount of copper sulfate is required for activation in the zinc sulfide flotation operation. The amount of copper sulfate is as high as 800-1000g / t, and the reagent cost is high; 3) On-site process of zinc oxide flotation The technical process of flotation after desliming is adopted, resulting in the removal of nearly 50% of the zinc metal content, resulting in a low recovery rate of zinc oxide; 4) zinc oxide generally uses fatty acid or amine collectors, which are collected The amount of agent foam is large, resulting in rich flotation foam and high viscosity, difficult defoaming, and unstable flotation process; 5) The pH value of the mineral processing backwater is as high as 11, making it difficult to reuse

Method used

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  • A kind of flotation recovery method of high-calcium-magnesium-high-shale mixed lead-zinc ore
  • A kind of flotation recovery method of high-calcium-magnesium-high-shale mixed lead-zinc ore
  • A kind of flotation recovery method of high-calcium-magnesium-high-shale mixed lead-zinc ore

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Experimental program
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Effect test

Embodiment 1

[0045] The present embodiment provides a flotation recovery method for a high-calcium-magnesium and high-shale mixed lead-zinc ore, comprising the following steps:

[0046] S1. After crushing the high-calcium-magnesium and high-shale mixed lead-zinc ore, add 750g / t of lime in the grinding process for wet grinding on a per ton of raw ore basis, so that the mass percentage of the ore with a particle size of less than 0.074mm is 80% ~85%, and add water to adjust the pulp concentration to 35%.

[0047] S2, adopt the process of one roughing, two sweeping and three selecting processes to carry out lead sulfide flotation on the pulp obtained in step S1, to obtain lead sulfide concentrate and roughing tailings for the first time; wherein, the roughing agent is 600g / t of sodium sulfide, 250g / t of zinc sulfate, 250g / t of sodium sulfite, 70g / t of ethion, 13g / t of black medicine and 15g / t of 2# oil; the agents selected for the first sweep are: 25g / t ethionine; 15g / t ethionine for the se...

Embodiment 2～3 and comparative example 2～3

[0068] Embodiments 2-3 and Comparative Examples 2-3 respectively provide a flotation recovery method for mixed lead-zinc ore with high calcium and magnesium and high shale. Compared with embodiment 1, the difference is that the addition amount of lime is adjusted. Wherein, the addition amounts of lime in Examples 2-3 and Comparative Examples 1-2 were 500 g / t, 1000 g / t, 4000 g / t and 5000 g / t, respectively.

[0069] According to the methods provided in Examples 2 to 3 and Comparative Examples 2 to 3, flotation was performed on the mixed lead-zinc ore with high calcium and magnesium shale, and the results are shown in Table 3.

[0070] The beneficiation test results of Table 3 Examples 2-3 and Comparative Examples 2-3

[0071]

[0072] As can be seen from Table 3, under the same ore sample conditions, the lead-zinc sulfide low-alkali flotation process adopted in Examples 2-3 not only effectively reduces the lead-zinc sulfide high-alkali flotation process used in Comparative Ex...

Embodiment 4～5

[0074]Embodiments 4 to 5 respectively provide a flotation recovery method for a high-calcium-magnesium and high-shale mixed lead-zinc ore. Compared with Embodiment 1, the difference lies in that the chemical content in each step is adjusted, and the remaining steps are the same as those in the implementation. Example 1 is the same and will not be repeated here.

[0075] In embodiment 4, in step S2, the rough selection agent is sodium sulfide 500g / t, zinc sulfate 200g / t, sodium sulfite 200g / t, ethyl thiazide 60g / t, black medicine 10g / t, 2# oil 10g / t; The first cleaning agent is 20g / t ethion; the second cleaning agent is 10g / t ethion; the first cleaning agent is 100g / t zinc sulfate and 100g / t sodium sulfite; The selected agents are zinc sulfate 50g / t and sodium sulfite 50g / t. In step S3, the rough selection agents are sodium hexametaphosphate 200g / t, copper sulfate 450g / t, butyl xanthate 80g / t, 2# oil 10g / t; the first sweep selection agent is butyl xanthate 20g / t ; The second ...

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Abstract

The invention provides a method for flotation recovery of high-calcium-magnesium-high-mud mixed lead-zinc ore. A small amount of lime is added to the raw ore for wet grinding to obtain ore pulp; then lead sulfide flotation, zinc sulfide flotation, and desulfurization are sequentially carried out Flotation and zinc oxide flotation, realize the flotation recovery of mixed lead-zinc ore. Through the above method, the present invention adopts lead-zinc sulfide low-alkali flotation and zinc oxide collector without desliming full-grain flotation technology, realizes the efficient flotation recovery of mixed lead-zinc ore, and greatly improves the lead-zinc The recovery rate further improves the utilization rate of resources; at the same time, the present invention can effectively solve the problems existing in the existing high-alkali process and the flotation process after zinc oxide desliming, making the overall flotation process green, stable and efficient, with good The technical and economic indicators can meet the needs of practical applications and have high application value.

Description

technical field [0001] The invention relates to the technical field of lead-zinc ore flotation, in particular to a flotation recovery method for high-calcium-magnesium and high-shale mixed lead-zinc ore. Background technique [0002] The mixed lead-zinc ore with high calcium and magnesium content generally has the following characteristics: 1) There are many kinds of calcium-magnesium gangue minerals, including not only calcium-magnesium carbonates such as dolomite and calcite, but also quartz, feldspar, amphibole, pyroxene, etc. Stone, chlorite, mica and other magnesium silicates; 2) The mineral content of calcium magnesium gangue is high, up to 50% to 70%; 3) The sludge is serious, and the ore contains a lot of slime. Among them, there are two reasons for the formation of ore slime. One is primary ore slime, mainly the argillaceous gangue minerals in the ore, such as chlorite, kaolinite, sericite, limonite and hematite, etc. The content of slime less than 10μm is as high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/002B03D1/012B03D1/018B03B1/00B03D101/02B03D103/04
CPCB03D1/002B03D1/012B03D1/018B03B1/00B03D2203/04B03D2201/02Y02W30/52
Inventor 祁忠旭尹贤刚冯程孙大勇韩远燕王龙肖舜元李杰翟旭东李昭旺王硕郑润浩宋水祥江旭
Owner CHINA MINMETALS CHANGSHA MINING RES INST
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