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Application of 1,3,4-thiadiazole compounds in sulfide ore flotation

A technology of thiadiazoles and compounds, which is applied in the field of high-efficiency and high-separation flotation agents, can solve the problems of high pH requirements for flotation pulp, difficulty in effectively removing pyrite from concentrates, and poor selective collection capacity. , to achieve good flotation selectivity and recovery

Active Publication Date: 2020-03-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Xanthate can coordinate stably with most transition metals, but because of its poor selective collection ability, it is often difficult to effectively remove concentrate pyrite when using xanthate as a collector in the flotation of sulfide minerals. Disadvantages such as large dosage of chemicals and high requirements on the pH of flotation pulp

Method used

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  • Application of 1,3,4-thiadiazole compounds in sulfide ore flotation
  • Application of 1,3,4-thiadiazole compounds in sulfide ore flotation
  • Application of 1,3,4-thiadiazole compounds in sulfide ore flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The 1,3,4-thiadiazole compound (in formula 1, R 1 , R 2 Respectively hydrogen, n-hexyl), ethyl sodium xanthate, 2 # Add the oil into 1L of deionized water (concentration: 0.1mol / L) at the ratio of 0.075mol: 0.020mol: 0.005mol, stir magnetically at 40°C for 30min to fully mix the medicine, and seal it for use.

[0049] Lead-zinc sulfide ore from a factory in South China is used as the raw ore, and the metal grades of the raw ore are Fe: 28.3%, Pb: 3.8%, and Zn: 5.5%. Wet grind the raw ore for 4 minutes to make the particle size less than 0.074mm.

[0050] Grinding 500g raw ore (the pH of the grinding is 8, the particle size before ball milling is 0.150-0.074mm, and the particle size after ball milling is not more than 0.074mm, using a conical ball mill for wet grinding, and the grinding concentration is 35-40%), using figure 1 The process shown is carried out in a 1.5L flotation machine for flotation experiments. The raw ore (0.150-0.074mm) is wet-milled for 4 minutes...

Embodiment 2

[0056] The 1,3,4-thiadiazole compound (in formula 1, R 1 , R 2 Hydrogen group, ethyl group), ethyl sodium xanthate, and terpineol were added to 1L deionized water (concentration: 0.1mol / L) at a ratio of 0.080mol:0.015mol:0.005mol, and magnetically stirred at 40°C for 30min , so that the agent is fully mixed, and sealed for use.

[0057] Concentrates of pyrite, galena and sphalerite in South China are used. use Figure 4 The process shown in the experiment is divided into two groups, and the flotation agent of ethyl sodium xanthate is used as the flotation agent to compare with the flotation agent compounded in this case. Sodium xanthate replaces the compound flotation agent in this case, so as to compare the flotation effect of ethyl sodium xanthate and flotation agent in this case.

[0058] The concentrate ore (with a particle size of 3mm-0.5mm) was dry-milled for 15 minutes (the particle size after grinding was 0.0740-0.0374mm, the grinding pH of pyrite was 6, the grindi...

Embodiment 3

[0062] The 1,3,4-thiadiazole compound (in formula 1, R 1 , R 2 Hydrogen group, phenyl group), ethyl sodium xanthate, and terpineol were added into 1L deionized water (concentration: 0.1mol / L) at a ratio of 0.085mol:0.010mol:0.005mol, and magnetically stirred at 40°C for 30min , so that the agent is fully mixed, and sealed for use.

[0063] Concentrates of pyrite, galena and sphalerite in South China are used. Figure 6 The process shown in the experiment is divided into two groups, and the flotation agent of ethyl sodium xanthate is used as the flotation agent to compare with the flotation agent compounded in this case. Sodium xanthate replaces the compound flotation agent in this case, so as to compare the flotation effect of ethyl sodium xanthate and the prepared flotation agent in this case.

[0064] The specific operation is: dry-grind the concentrate ore (with a particle size of 3mm-0.5mm) for 15 minutes (the particle size after grinding is 0.0740-0.0374mm), in which t...

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Abstract

The invention belongs to the field of mineral flotation, particularly discloses application of a 1,3,4-thiadiazole compound to sulphide mineral flotation, and also provides an efficient and high-selectivity flotation reagent for sulfide mineral. The efficient and high-selectivity flotation reagent for sulfide mineral comprises the 1,3,4-thiadiazole compound, a foaming agent and a collecting assisting agent. The 1,3,4-thiadiazole compound has the excellent sulphide mineral flotation separation effect, the 1,3,4-thiadiazole compound, the existing foaming agent and the collecting assisting agentare compounded, and the flotation performance can be further improved. According to the flotation reagent, useful sulphide mineral can be preferentially subjected to flotation; separation between theuseful sulphide mineral and pyrite can be achieved in the wide pH range (4-10), and concentrate lead and zinc grade and recovery rate can be simultaneously improved.

Description

technical field [0001] The invention belongs to the field of mineral flotation, in particular to a high-efficiency and high-separation flotation agent for sulfide minerals. Background technique [0002] Among sulfide minerals, pyrite (FeS 2 ) is the most common associated mineral, with high content but low economic value, which often interferes with the flotation and smelting of useful minerals (such as sphalerite, galena, etc.). In the flotation process, pyrite floats out together with useful minerals, which reduces the metal grade of the flotation concentrate and affects the production index of the concentrate; in the smelting process, too much pyrite in the concentrate will cause acid water, sulfur dioxide The increase in emissions and the increase in smelting waste have forced metal processing companies to face high environmental protection costs. For a long time, lead-zinc sulfide ore concentrators urgently need to reduce the pyrite content of sulfide mineral flotatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/012B03D103/02B03D101/02
CPCB03D1/012B03D2201/02B03D2203/02
Inventor 孙伟张晚佳高志勇曹建胡岳华
Owner CENT SOUTH UNIV
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