Methyl sulfonic acid system bismuth sulfide concentrate oxygen pressure leaching method

A technology of methanesulfonic acid and oxygen pressure leaching, which is applied in the direction of improving process efficiency, can solve the problems of complex operation process, high equipment corrosion, low bismuth leaching rate, etc., and achieves high solubility, high leaching rate and high efficiency. Dissolution effect

Active Publication Date: 2019-11-01
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for oxygen pressure leaching of bismuth sulfide concentrate in methanesulfonic acid system, to solve the problem of low bismuth leaching rate, complex operation process and pollution in the existing bismuth smelting process mentioned in the above background technology. High, high corrosion to equipment, high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Process principle of the present invention is as follows:

[0024] 2 Bi 2 S 3 +12CH 3 SO 3 H+3O 2 =4Bi(CH 3 SO 3 ) 3 +6S 0 +6H 2 o

[0025] A methanesulfonic acid system bismuth sulfide concentrate oxygen pressure leaching method comprises the steps of:

[0026] Take 125g of bismuth sulfide concentrate (containing 23% Bi) and carry out grinding work. Grind the bismuth sulfide concentrate to 97% so that the particle size of the concentrate is less than 30μm. Add 400g / L methanesulfonic acid and 9g / L iron to extract agent, make the volume of liquid and the mass ratio of solid be 8:1, then add surfactant, wherein surfactant adopts calcium lignosulfonate, the addition amount is 0.7% of raw material quality, the ore pulp prepared is added into autoclave, At the same time, the autoclave was heated to 135°C, and the temperature was controlled to be stable at 135°C, then oxygen was introduced, the pressure was 1.0MPa, the stirring speed was 400 rpm, and the reaction t...

Embodiment 2

[0028] Process principle of the present invention is as follows:

[0029] 2 Bi 2 S 3 +12CH 3 SO 3 H+3O 2 =4Bi(CH 3 SO 3 ) 3 +6S 0 +6H 2 o

[0030] A methanesulfonic acid system bismuth sulfide concentrate oxygen pressure leaching method comprises the steps of:

[0031] Take 125g of bismuth sulfide concentrate (containing 23% Bi) and carry out grinding work. Grind the bismuth sulfide concentrate to 97% so that the particle size of the concentrate is less than 50 μm. Add 280g / L of methanesulfonic acid and 9g / L of iron Leaching agent, make the volume of liquid and the mass ratio of solid be 8:1, then add surfactant, wherein surfactant adopts sodium lignosulfonate, and the addition consumption of sodium lignosulfonate is 0.7% of raw material quality, Put the prepared pulp into the autoclave, heat the autoclave to 135°C at the same time, and control the temperature to stabilize at 135°C, then feed oxygen, the pressure is 1.0MPa, the stirring speed is 400 rpm, the reactio...

Embodiment 3

[0033] Process principle of the present invention is as follows:

[0034] 2 Bi 2 S 3 +12CH 3 SO 3 H+3O 2 =4Bi(CH 3 SO 3 ) 3 +6S 0 +6H 2 o

[0035] A methanesulfonic acid system bismuth sulfide concentrate oxygen pressure leaching method comprises the steps of:

[0036] Take 100g of bismuth sulfide concentrate (containing Bi23%), and carry out grinding work. Grind the bismuth sulfide concentrate to 97%, so that the particle size of the concentrate is less than 30μm, and add a leaching agent containing 300g / L of methanesulfonic acid and 5g / L of iron , make the volume of liquid and the mass ratio of solid be 10:1, then add surfactant, wherein surfactant adopts lignite, and the addition consumption of lignite is 0.6% of raw material quality, the ore slurry that is prepared is added into autoclave, simultaneously The autoclave was heated to 90°C, and the temperature was controlled to stabilize at 90°C, then oxygen was introduced to control the pressure in the autoclave t...

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PUM

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Abstract

The invention discloses a methyl sulfonic acid system bismuth sulfide concentrate oxygen pressure leaching method. The method comprises the following steps that S1, material pretreatment is carried out, wherein bismuth sulfide concentrate is added into a vertical mill, fine grinding treatment is carried out on the bismuth sulfide concentrate by using the vertical mill, and then the screened material is dried for later use; and S2, liquid preparation is carried out, wherein iron powder is properly added into a methyl sulfonic acid solution according to iron-containing phases and the iron content in the material, and then the solution is stirred, so that the iron powder and the methyl sulfonic acid solution are fully mixed to obtain an iron-containing methyl sulfonic acid leaching agent. According to the method, an oxygen pressure leaching technology is adopted to replace a traditional redox roasting pyrogenic process, so that bismuth is efficiently extracted, and the generation of low-concentration sulfur dioxide is avoided fundamentally. According to the bismuth sulfide concentrate leaching method, the leaching rate of the bismuth is high and can reach 93% or above, the technological process is simple. The method is simple to operate, the bismuth can be efficiently dissolved out, a sulfur product can be obtained, SO2 is not generated, and the environment-friendly advantage is achieved.

Description

technical field [0001] The invention relates to the related technical field of ferrous metal hydrometallurgy, in particular to an oxygen pressure leaching method of bismuth sulfide concentrate in a methanesulfonic acid system. Background technique [0002] The bismuth smelting process is divided into two types: pyromethod and wet method. Bismuth pyrometallurgy is suitable for raw materials with high bismuth content. The specific processes include smelting smelting, precipitation smelting, reduction smelting, mixing smelting and low-temperature alkaline smelting. For example, Chinese patent CN103305707A discloses a method for smelting bismuth concentrate; that is, metal oxide is used as a sulfur-fixing agent, sodium carbonate is used as a reaction solvent, and carbon is used as a reducing agent to melt at 750-950° C. to obtain rough bismuth; the method can Efficiently obtain coarse bismuth, simple equipment, short production cycle, but there is also low concentration of SO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/06C22B3/16
CPCC22B3/165C22B30/06Y02P10/20
Inventor 陈永明王恒辉邓鑫杰杨声海周晓源何静何醒民
Owner CENT SOUTH UNIV
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