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Method for mixed selection and re-purification of cassiterite and sulfide ores

A technology of sulfide ore and purification method, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of large proportion of fine particles in tailings, loss of tin, inclusion of tin, etc., to reduce the types of chemicals and effect of quantity

Active Publication Date: 2010-07-07
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of comprehensive recovery of cassiterite polymetallic sulfide ore, due to the coarse grain size and brittleness of cassiterite crystals, over-grinding is easy to occur; while the crystal grain size of sulfide ores is fine, under-grinding is prone to occur during grinding. In order to comprehensively recover cassiterite and Sulfur-containing polymetallic ores, there will inevitably be a large number of fine-grained cassiterite and coarser-grained sulfide ores that cannot be recovered and become tailings
After these tailings have been stockpiled for a long time, it is very difficult to recover the cassiterite in the tailings. On the one hand, there are fine and fine particles of cassiterite in the tailings; on the other hand, there are some sulfide ores in the tailings. In order to recover cassiterite, this part of sulfide ore must be floated first, and tin inclusions will be formed during the flotation process of sulfide ore, resulting in the loss of tin; in addition, the proportion of fine-grained tailings is relatively large, and part of sulfide ore Oxidation occurs on the surface, which is not conducive to the recovery of sulfide ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] mineral raw material

[0020] In a tailing mine in Guangxi, the grade of tin in the ore is 0.47%, the grade of lead is 0.43%, the grade of antimony is 0.37%, the grade of zinc is 1.35%, the grade of sulfur is 15.23%, the grade of silicon dioxide is 20.87%, and the grade of calcium carbonate is 4.67%.

[0021] Said cassiterite sulfide ore mixed separation and purification method is carried out as follows:

[0022] 1. According to the stroke rate of the shaker is 19 times / min, and the stroke rate is 255 times / min, the fine-grained cassiterite and sulfide ore with similar specific gravity are enriched into cassiterite sulfide ore mixed coarse concentrate;

[0023] 2. Flotation of cassiterite sulfide ore with coarse concentrate using reverse flotation process to obtain cassiterite coarse concentrate without sulfide ore. The flotation agent used in the reverse flotation process is: water glass 500g / t , sodium sulfide 1000g / t, amyl xanthate 300g / t, 2 # Oil 100g / t.

[0024]...

Embodiment 2

[0032] mineral raw material

[0033] In a tailings mine in Guangxi, the grades of tin in the ore are 0.51%, lead 0.49%, antimony 0.41%, zinc 2.13%, sulfur 16.23%, silicon dioxide 21.65%, and calcium carbonate 5.50%.

[0034] Said cassiterite sulfide ore mixed separation and purification method is carried out as follows:

[0035] 1. According to the stroke rate of the shaker is 21 times / min, and the stroke rate is 265 times / min, the fine-grained cassiterite and sulfide ore with similar specific gravity are enriched into cassiterite sulfide ore mixed coarse concentrate;

[0036] 2. Flotation of cassiterite sulfide ore with coarse concentrate using reverse flotation process to obtain cassiterite coarse concentrate without sulfide ore. The flotation agent used in the reverse flotation process is: water glass 1000g / t , sodium sulfide 2000g / t, amyl xanthate 500g / t, 2 # Oil 120g / t.

[0037] When in use, the medicament is first prepared into the following weight percent concentrati...

Embodiment 3

[0045] mineral raw material

[0046] In a tailing mine in Guangxi, the grade of tin in the ore is 0.48%, the grade of lead is 0.46%, the grade of antimony is 0.39%, the grade of zinc is 1.65%, the grade of sulfur is 15.87%, the grade of silicon dioxide is 19.79%, and the grade of calcium carbonate is 4.93%.

[0047] Said cassiterite sulfide ore mixed separation and purification method is carried out as follows:

[0048] 1. According to the stroke rate of the shaker is 20 times / min, and the stroke rate is 260 times / min, the fine-grained cassiterite and sulfide ore with similar specific gravity are enriched into cassiterite sulfide ore mixed coarse concentrate;

[0049] 2. Use the reverse flotation process to float the sulfide ore by mixing cassiterite sulfide ore with coarse concentrate to obtain cassiterite coarse concentrate without sulfide ore. The flotation agent used in the reverse flotation process is: water glass 800g / t , sodium sulfide 1500g / t, amyl xanthate 400g / t, 2 ...

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Abstract

The invention discloses a method for mixed selection and re-purification of cassiterite and sulfide ores, which comprises the following steps of: enriching fine-particle cassiterite and the sulfide ores into a mixed rough concentrate of the cassiterite sulfide ores by using a table concentrator; performing flotation on the sulfide ores in the mixed rough concentrate of the cassiterite sulfide ores by adopting a reverse flotation flow so as to obtain a cassiterite rough concentrate which does not contain the sulfide ores; and performing reselection on the cassiterite rough concentrate by usinga fine-particle table concentrator to obtain a cassiterite concentrate. The method can effectively recover the fine-particle cassiterite in tailings to obtain high-quality cassiterite concentrate of which the tin grade is 47.83 to 48.75 percent and the recovery rate is 63.51 to 64.37 percent under the condition that the feeding cassiterite content is 0.47 to 0.51 percent.

Description

1. Technical field [0001] The invention relates to a cassiterite purification method, in particular to a cassiterite purification method containing fine-grained cassiterite and partial sulfide ore in tailings. 2. Background technology [0002] In the process of comprehensive recovery of cassiterite polymetallic sulfide ore, due to the coarse grain size and brittleness of cassiterite crystals, over-grinding is easy to occur; while the crystal grain size of sulfide ores is fine, under-grinding is prone to occur during grinding. In order to comprehensively recover cassiterite and For sulfur-containing polymetallic ores, there will inevitably be a large number of fine-grained cassiterite and coarser-grained sulfide ores that cannot be recovered and become tailings. After these tailings have been stockpiled for a long time, it is very difficult to recover the cassiterite in the tailings. On the one hand, there are fine and fine particles of cassiterite in the tailings; on the oth...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B5/04B03D1/00B03D1/018
Inventor 陈建华魏宗武周德炎穆枭陈晔王檑王进明李宁均
Owner GUANGXI UNIV
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