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Method for separating dolomite from dolomite-barytes lead and zinc mine

A dolomite and barite technology, applied in the direction of solid separation, can solve the problems of foam stickiness, dolomite over-grinding, and affecting the separation index of lead and zinc, so as to reduce the amount of ore, solve the problem of foam stickiness, Solving the effect of low lead and zinc indicators

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

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

Method used

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  • Method for separating dolomite from dolomite-barytes lead and zinc mine
  • Method for separating dolomite from dolomite-barytes lead and zinc mine

Examples

Experimental program
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Embodiment 1

[0024] 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 method of present embodiment coarse-grained separation dolomite is with reference to figure 1 The flow shown is carried out and includes the following steps:

[0025] S1: Ore Crushing

[0026] The ore is crushed to the size range of -15mm+4mm (that is, less than 15mm and greater than 4mm), the mass ratio of ore with a particle size between -15+4mm is 78%, and the ore with a particle size of -4mm (less than 4mm) enters the beneficiation The powder ore bin of the factory is used as the feed material for the grinding machine, and then enters the flotation; the -15mm+4mm grain grade ore enters the ore washing.

[0027] S2: Wash ore

[0028] The -15mm+4mm ore is washed with a vibrating screen with 2mm mesh and high-pressure water flushing, and the fine-grained grade under the screen is also ...

Embodiment 2

[0038] 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 method of present embodiment coarse-grained separation dolomite is with reference to figure 1 The flow shown is carried out and includes the following steps:

[0039] S1: Ore Crushing

[0040] The ore is crushed to the range of -15+2mm particle size, the mass ratio of ore with particle size between -15+2mm is 84.5%, -2mm is used as the feed material of the grinding machine, and the -15+2mm particle size enters the ore washing.

[0041] S2: Wash ore

[0042] The -15+2mm ore is washed with a vibrating screen with 2mm sieve holes and high-pressure water washing. The fine-grained fraction under the sieve is also used as a grinding feed after being concentrated. Sorting with a machine, the sieve size obtained by ore washing contains 0.96% lead and 3.36% zinc.

[0043] S3: Dense medium cyc...

Embodiment 3

[0051] 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 method of present embodiment coarse-grained separation dolomite is with reference to figure 1 The flow shown is carried out and includes the following steps:

[0052] S1: Ore Crushing

[0053] The ore is crushed to the range of -20+2mm particle size, the mass ratio of ore with particle size between -20+2mm is 84.9%, -2mm is used as the feed material of the grinding machine, and the -20+2mm particle size enters the ore washing.

[0054] S2: Wash ore

[0055] The -20+2mm ore is washed with a vibrating screen with 2mm mesh and high-pressure water washing. The fine-grained grade under the screen is also used as the grinding feed after being concentrated. Sorted by flow device, the above-sieve particle size obtained by ore washing contains 0.91% lead and 3.35% zinc. ...

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Abstract

The invention belongs to the technical field of mineral separation, and particularly discloses a method for separating dolomite from dolomite-barytes lead and zinc mine. The method comprises the following steps of crushing dolomite-barytes type lead and zinc ore, and screening out ore with the granularity of -20+2 mm; conducting ore washing on the ore with the particle size of -20+2 mm to obtain oversize minerals, and sorting the oversize minerals in a dense medium cyclone to obtain a heavy product and a light product; and removing the medium of the heavy product and the medium of the light product through a sieve mesh vibrating screen, after the medium of the heavy product is removed, enabling oversize products to be heavy minerals mainly comprising sulphide ore and barytes, and after the medium of the light product is removed, enabling oversize products to be light minerals mainly comprising dolomite. According to the method provided by the invention, separation of coarse-grained dolomite and sulphide ore can be realized, the amount of ore entering the ore grinding operation is reduced, and the purposes of energy conservation and consumption reduction are achieved; and meanwhile, most of the dolomite which is easily over-ground and argillized is separated in advance and does not enter the ore grinding flotation operation, so that the problems of sticky foam, low lead and zinc indexes and the like caused by over-grinding and argillization of the dolomite can be solved.

Description

technical field [0001] The invention relates to the technical field of mineral separation, in particular to a method for separating dolomite at the coarse grain level of 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. Dolomite-barite type lead-zinc ore contains a large amount of dolomite, generally accounting for more than 60%; and dolomite is easy to over-grind and muddy in the grinding process, resulting in sticky foam during the flotation process, which seriously It affects the separation index of lead and zinc, which is one of the difficult problems of lead and zinc mineral processing at present. [0003] Therefore, it is necessary to study the characteristics of dolomite-barite type lead-zinc ore in order to propose a new sorting method to so...

Claims

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Application Information

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IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 饶金山胡红喜陈志强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