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Dolomite-barite type lead zinc ore separation flotation method

The technology of barite and dolomite is applied in the field of separation and flotation of dolomite-barite lead-zinc ore, which can solve the problems of affecting the separation index of lead and zinc, over-crushing of barite, difficulty in recycling and the like, Achieve the effect of solving the problem of low flotation index, reducing the amount of ore and reducing the content of minerals

Active Publication Date: 2021-06-15
INST OF RESOURCES COMPREHENSIVE UTILIZATION GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the dolomite-barite type lead-zinc ore contains a large amount of dolomite, generally accounting for more than 60%. Dolomite is easy to be over-grinded in the grinding process, resulting in sticky foam during the flotation process. , has seriously affected the separation index of lead-zinc, which is one of the difficult problems of lead-zinc mineral processing at present; Grinding and flotation, resulting in the over-crushing of barite, which is difficult to recycle

Method used

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  • Dolomite-barite type lead zinc ore separation flotation method

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Embodiment 1

[0031] The dolomite-barite type lead-zinc ore treated in this embodiment contains 0.97% lead, 3.33% zinc, about 16% barite mineral content, and about 63% gangue mineral dolomite content. The separation flotation method that this embodiment provides refers to figure 1 The flow shown is carried out and includes the following steps:

[0032] S1: crushing-screening

[0033] The dolomite-barite type lead-zinc ore is crushed to -15mm, and the mass ratio of the ore with a particle size between -15+4mm is 78%, and the fine minerals with a particle size of -4mm enter the powder ore bin of the concentrator. As the feed material of the ore grinding machine, the -15mm+4mm grain grade minerals enter the ore washing; the -15mm+4mm ore is washed with a vibrating screen with a 2mm screen hole and high-pressure water washing, and the fine-grained grade under the screen is concentrated and used as a mill The ore feed, the size on the sieve enters the dense medium cyclone for sorting, and the ...

Embodiment 2

[0045] The dolomite-barite type lead-zinc ore processed in this embodiment contains 0.97% lead, 3.33% zinc, about 16% barite mineral content, and about 67% gangue dolomite mineral content. The separation flotation method that this embodiment provides refers to figure 1 The flow shown is carried out and includes the following steps:

[0046] S1: crushing-screening

[0047] Dolomite-barite type lead-zinc ore is crushed to -15mm, and the mass ratio of ore with a particle size between -15+2mm is 84.5%, and the fine minerals with a particle size of -2mm are used as a grinding machine Feeding, -15+2mm grain grade minerals enter the ore washing; the -15+2mm ore is washed with a vibrating screen with 2mm sieve holes and high-pressure water washing, and the fine-grained grades under the screen are concentrated and used as grinding feedstock. The above-screen particle size enters the heavy medium cyclone for separation, and the above-screen particle size obtained by ore washing has a ...

Embodiment 3

[0059] The dolomite-barite type lead-zinc ore processed in this embodiment contains 0.97% lead and 3.33% zinc, the mineral content of barite is about 16%, and the mineral content of gangue dolomite is about 67%. The separation flotation method that this embodiment provides refers to figure 1 The flow shown is carried out and includes the following steps:

[0060] S1: crushing-screening

[0061] The dolomite-barite type lead-zinc ore ore is crushed to -20mm, and the mass ratio of the ore with a particle size in the range of -20+2mm is 84.9%, and the fine minerals with a particle size of -2mm are used as the feed material for the grinding machine. Minerals of -20+2mm grain size enter the ore washing; the -20+2mm ore is washed by a vibrating screen with 2mm mesh and high-pressure water washing, and the fine-grained grade under the sieve is concentrated and used as grinding feed, and the sieve is used as a grinding feed. The grade enters the dense medium cyclone for separation, ...

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Abstract

The invention belongs to the technical field of mineral separation, and particularly discloses a dolomite-barite type lead zinc ore separation flotation method. The method comprises the steps: crushing dolomite-barite type lead zinc ore to screen out ore with the particle size being-20 + 2 mm, then feeding oversize fraction minerals after ore washing into a dense medium cyclone to be separated to obtain heavy products and light products; respectively draining the medium from the heavy product and the light product to obtain oversize products which are heavy minerals and light minerals; and carrying out coarse grinding and flotation on the heavy minerals to obtain sulphide ore flotation concentrate and non-sulphide ore, wherein the sulphide ore flotation concentrate is the mineral containing galena, sphalerite and pyrite, and the non-sulphide ore is the mineral containing barite. The method provided by the invention can realize separation of coarse-grained dolomite and sulphide ore, and fundamentally solves the problems that the dolomite is easy to be over-ground and argillized to cause foam stickiness, lead and zinc indexes are influenced and the like; and separation of sulfide ore and barite can be realized under the condition of relatively coarse granularity, so that a basis is provided for subsequent reselection and recovery of the barite.

Description

technical field [0001] The invention relates to the technical field of mineral separation, in particular to a separation and flotation method for dolomite-barite type lead-zinc ore. Background technique [0002] At present, when the dolomite-barite-type lead-zinc ore is separated by beneficiation, the direct flotation method is generally used for separation, and the lead-zinc ore concentrate is obtained by beneficiation. On the one hand, the dolomite-barite type lead-zinc ore contains a large amount of dolomite, generally accounting for more than 60%. Dolomite is easy to be over-grinded in the grinding process, resulting in sticky foam during the flotation process. , has seriously affected the separation index of lead-zinc, which is one of the difficult problems of lead-zinc mineral processing at present; Grinding flotation causes the barite in it to be too crushed, making it difficult to recycle. [0003] Therefore, it is necessary to study the characteristics of dolomite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 陈志强饶金山胡红喜吕昊子刘超刘勇周吉奎吕先谨马致远吕建芳
Owner INST OF RESOURCES COMPREHENSIVE UTILIZATION GUANGDONG ACAD OF SCI
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