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A cyanide-free separation process of low-grade tin-lead-zinc polymetallic sulfide mineral lead-zinc

A low-grade, multi-metal technology, applied in flotation, solid separation, wet separation, etc., can solve problems such as large safety risks and environmental protection hazards, to eliminate safety, increase production costs, improve concentrate grade and recovery rate Effect

Active Publication Date: 2021-06-25
广西华锡矿业有限公司铜坑矿业分公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantage is that the metal recovery rate is high, but the disadvantage is that a large amount of highly toxic cyanide is added as an inhibitor for the separation and recovery of lead and zinc, and there are relatively large safety risks and environmental protection hazards in the production process.
[0004] In 2010, my country has made it clear that the use of cyanide in the beneficiation process will be used to eliminate backwardness. Although most lead-zinc ore beneficiation at home and abroad have achieved cyanide-free separation, in the field of low-grade tin-lead-zinc complex polymetallic beneficiation, it is necessary to ensure It is still a world-class problem to achieve cyanide-free separation without reducing the recovery rate of metals

Method used

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  • A cyanide-free separation process of low-grade tin-lead-zinc polymetallic sulfide mineral lead-zinc
  • A cyanide-free separation process of low-grade tin-lead-zinc polymetallic sulfide mineral lead-zinc
  • A cyanide-free separation process of low-grade tin-lead-zinc polymetallic sulfide mineral lead-zinc

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Embodiment 1

[0032] This embodiment provides a cyanide-free separation process for low-grade tin-lead-zinc polymetallic sulfide mineral lead-zinc. The tin grade in the raw ore is 0.54%, the lead grade is 0.23%, the zinc grade is 2.0%, and the pyrrhotite content is 8%, and pyrite accounts for 10%; among them, Pb in lead sulfide accounts for 85% of the lead metal content, and Zn in zinc sulfide accounts for 98% of the zinc metal content;

[0033] The specific steps of the sorting process are:

[0034] (1) Grinding: After the low-grade tin polymetallic sulfide minerals are ground and classified, the qualified particle size of -200 mesh enters the lead-zinc separation and flotation operation;

[0035](2) Lead separation flotation: In the lead-zinc flotation separation operation, the process of "one rough, three fine and three sweeps" is adopted, and inhibitor 1 and inhibitor are added respectively in rough selection, selection Ⅰ, selection Ⅱ and selection Ⅲ 2 As a zinc mineral inhibitor, it i...

Embodiment 2

[0042] This embodiment provides a cyanide-free separation process for low-grade tin-lead-zinc polymetallic sulfide minerals lead and zinc. The tin grade in the raw ore is 0.25%, the lead grade is 0.15%, the zinc grade is 1.4%, and the pyrrhotite content is 4%, and pyrite accounts for 8%; among them, Pb in lead sulfide accounts for 70% of the lead metal content, and Zn in zinc sulfide accounts for 90% of the zinc metal content;

[0043] The specific steps of the sorting process are:

[0044] (1) Grinding: After the low-grade tin polymetallic sulfide minerals are ground and classified, the qualified particle size of -200 mesh enters the lead-zinc separation and flotation operation;

[0045] (2) Lead separation flotation: In the lead-zinc flotation separation operation, the process of "one rough, three fine and three sweeps" is adopted, and inhibitor 1 and inhibitor are added respectively in rough selection, selection Ⅰ, selection Ⅱ and selection Ⅲ 2 As a zinc mineral inhibitor,...

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Abstract

The invention provides a cyanide-free separation process for low-grade tin-lead-zinc polymetallic sulfide mineral lead-zinc, which relates to the technical field of mineral processing. The cyanide-free separation process comprises the following steps: (1) grinding, (2) lead separation and flotation (3) Zinc separation flotation, (4) Magnetic separation; this process uses multi-point addition of green inhibitors to replace the highly toxic agent cyanide in the lead-zinc separation flotation operation to achieve efficient cyanide-free flotation separation of lead-zinc minerals, The lead-zinc mineral separation effect is good, the metal recovery rate is high, and the production cost is comparable to that of the lead-zinc separation flotation process using cyanide. It can effectively replace cyanide and meet the national requirements for eliminating backward processes. It is energy-saving and environmentally friendly. Dealing with the technical blank of green and efficient separation of lead and zinc in low-grade tin-lead-zinc polymetallic sulfide ores has very positive significance for the protection of natural ecological balance and the development of mineral resources.

Description

【Technical field】 [0001] The invention relates to the technical field of ore dressing, in particular to a cyanide-free separation process of low-grade tin-lead-zinc polymetallic sulfide mineral lead-zinc. 【Background technique】 [0002] Low-grade tin-lead-zinc polymetallic sulfide ore is a very common characteristic type of tin deposits in my country, accounting for about three quarters of the national primary deposits. The composition of the ore is complex, characterized by the presence of a large number of sulfide ores, including pyrite, pyrrhotite, and complex compounds of lead and antimony. The ore contains 0.2-0.6% tin and is mostly mined underground, and the beneficiation process is complicated. [0003] At present, for low-grade tin-lead-zinc complex polymetallic sulfide ores in the world, the coarse-grained cassiterite is generally recovered by the gravity separation process, the sulfide minerals are recovered by the flotation process, and the fine-grained tin is re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B1/00B03B7/00B03B9/00B03D1/002B03D1/012B03D1/018B03D1/016B03D103/02B03D101/02B03D101/06
Inventor 胡明振邬清平陈碧琰吴其聪黄宝兴兰谁李泽茂
Owner 广西华锡矿业有限公司铜坑矿业分公司
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