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Floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore

A sulfide ore and pre-operation technology, applied in the field of tin-copper symbiotic sulfide ore beneficiation, can solve problems such as affecting the recovery rate of cassiterite gravity separation, increasing the difficulty of cassiterite gravity separation and separation, and poor specific gravity, so as to improve the sulfur removal effect and reduce The effect of low chemical consumption and running cost

Inactive Publication Date: 2017-03-22
YUNNAN TIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is: in the rewashing system of shaking table tin selection, due to the large amount of enrichment of sulfur, iron and arsenic sulfide minerals, the specific gravity difference between cassiterite and sulfur, iron and arsenic sulfide minerals increases. Cassiterite re-selection sorting difficulty The difficulty of sorting affects the recovery rate of cassiterite re-selection

Method used

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  • Floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore
  • Floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore
  • Floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A 160-ton / day process shaker secondary concentrate was selected from the beneficiation workshop of Yunnan Gejiu Yunxi Kafang Branch.

[0019] See Table 1 for the ore feeding elements of the rewashing bed:

[0020] Table 1. Analysis of ore feed elements in rewashing bed

[0021]

[0022]

[0023] The method for removing impurities by flotation before rewashing and re-election of tin in shaker sub-concentrate (tin-copper symbiotic sulfide ore) is as follows:

[0024] (1) Concentrate re-washed secondary concentrates with re-election cassiterite with a metal content of 50% and washed by a shaking table, and use a φ250 cyclone to concentrate and dehydrate, and the cyclone feed pressure is 1kg / cm 2 , the ore feeding concentration is 10%, and the ore discharge and sand concentration concentration is 25%;

[0025] (2) Sand settling for flotation desulfurization and impurity removal to remove coarse particles and large specific gravity pyrite concentrates; flotation impu...

Embodiment 2

[0029] A 600-ton / day symbiotic sulfide ore process shaker secondary concentrate was selected in the beneficiation workshop of Yunnan Gejiu Yunxi Kafang Branch.

[0030] See Table 2 for the ore feeding elements of the rewashing bed:

[0031] Table 2. Analysis of ore feed elements in rewashing bed

[0032] element name Cu S sn content% 0.65 5.46 0.91

[0033] The method for removing impurities by flotation before rewashing and re-election of tin in shaker sub-concentrate (tin-copper symbiotic sulfide ore) is as follows:

[0034] (1) Concentrate re-washed sub-concentrates with a circulating metal content of 55% in gravity-selected cassiterite and washed by shaking tables, and use a φ250 cyclone to deslim the sub-concentrates in gravity-selected shaking tables. The ore feeding pressure of the device is 1kg / cm 2 , the ore feeding concentration is 12%, and the desliming tailings with a yield of 26.12% and the sand settling with a pulp concentration of 3...

Embodiment 3

[0039] The method for flotation and impurity removal before tin rewashing and gravity separation in tin-copper symbiotic sulfide ore is as follows:

[0040] (1) Concentrate re-washed sub-concentrates with re-election cassiterite recycling metal rate of 60%, coarse mineral particle size, large specificity, many combinations, poor monomer dissociation, and washed by shaking table, using φ250 spinner Concentrated and dehydrated by hydrocyclone, the ore feeding pressure of hydrocyclone is 1kg / cm 2 , the ore feeding concentration is 8%, and the ore discharge concentration is 20%;

[0041] (2) Sand settling for flotation desulfurization and impurity removal, removal of coarse particles and large specific gravity pyrite concentrates, and output of pyrite concentrates with arsenic content of 0.3-0.812% and sulfur content of more than 30% and anti-enrichment pyrite concentrates For tin tailings, flotation and impurity removal include a roughing and a sweeping operation. The roughing a...

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Abstract

The invention discloses a floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore. According to the method, backwashing secondary concentrate which is subjected to table cleaning with the reselection tin recycling metal rate content being 50-60% is gathered, a phi 250 hydrocyclone is adopted for concentrating and dewatering, and settling is conducted for floatation, desulfurization and impurity removal, and large-proportion iron sulfide concentrate with coarse particles is removed; and floatation and impurity removal comprise primary roughing and primary scavenging operations, and tinstone derichment tailings subjected to floatation and impurity removal are subjected to backwashing table reselection.

Description

technical field [0001] The invention relates to the technical field of beneficiation of tin-copper symbiotic sulfide ore. Background technique [0002] Tin has many advantages such as low melting point, good plasticity, corrosion resistance, non-toxicity, and resistance to processing fatigue. With the development of science and technology, the scope of application of tin is expanding day by day, and the demand for tin in countries around the world is constantly increasing, while tin resources are constantly changing to poor, fine, and miscellaneous, and the difficulty of comprehensive recycling of tin is also increasing. With the deep development of mines, there are many kinds of minerals in polymetallic sulfide ore ore ore, especially the content of sulfur, iron and arsenic is getting higher and higher. The symbiosis of these minerals greatly interferes with the selection of tin, which seriously affects the gravity separation of cassiterite. The recovery and sorting of cas...

Claims

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Application Information

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IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 袁经中陈绍伟赵荣陈红兵尹红兵陈明波李燕华石丽芬杨缘
Owner YUNNAN TIN
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