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Method for removing arsenic in lead concentrate

A lead concentrate and removal technology, applied in the direction of solid separation, flotation, etc., can solve problems such as unobstructed progress, environmental pollution, equipment corrosion, etc.

Active Publication Date: 2021-06-18
YUNNAN CHIHONG ZINC & GERMANIUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the smelting process, the obtained lead concentrate containing excessive arsenic is converted into arsine, arsenite, and organic arsenic compounds, which will cause problems such as equipment corrosion and environmental pollution, and greatly affect the normal production of enterprises.
Therefore, enterprises have extremely high requirements on the arsenic content of lead concentrates. Once the arsenic content exceeds the standard, it will lead to difficulties in selling lead concentrates, and even they can only be piled up for a long time.
[0005] There has been no significant progress in the research on the reduction of arsenic in lead concentrates containing galena-like minerals with similar properties to galena.

Method used

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  • Method for removing arsenic in lead concentrate
  • Method for removing arsenic in lead concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The lead content in the treated lead concentrate is 62.60%, and the arsenic content is 0.87%.

[0041] (1) Add 1000g / ton of lead concentrate to the lead concentrate and add sodium sulfide to adjust the slurry. After the slurry is adjusted, the potential of the slurry is -121mv, and the pH value is 9.12.

[0042] (2) Add fulvic acid, humate, bleaching powder and sodium sulfite with a mass ratio of 3:6:25:55 combined inhibitor and ethylthiourethane and diesel modified ethylthiourethane with a mass ratio of 1:3 The collector is used for roughing high-arsenic lead to obtain high-arsenic lead rough concentrate and rougher tailings. The addition amount of combined inhibitor is 4300g / ton of lead concentrate, and the addition amount of modified ethylthiourethane collector is 110g / ton of lead concentrate.

[0043] (3) The high-arsenic-lead rough concentrate is subjected to a beneficiation to obtain a concentrate and concentrate tailings, and the concentrate tailings are returne...

Embodiment 2

[0050] The lead content in the treated lead concentrate is 66.88%, and the arsenic content is 0.50%.

[0051] (1) Add 1000g / ton of lead concentrate to lead concentrate and add sodium sulfide to adjust the slurry. After slurry adjustment, the slurry potential is -121mv, and the pH value is 9.07.

[0052] (2) Add fulvic acid, humate, bleaching powder and sodium sulfite with a mass ratio of 3:6:25:55 combined inhibitor and ethylthiourethane and diesel modified ethylthiourethane with a mass ratio of 1:3 The collector is used for roughing high-arsenic lead to obtain high-arsenic lead rough concentrate and rougher tailings. The addition amount of combined inhibitor is 3400g / ton of lead concentrate, and the addition amount of modified ethylthiourethane collector is 40g / ton of lead concentrate.

[0053] (3) The high-arsenic-lead rough concentrate is subjected to a beneficiation to obtain a concentrate and concentrate tailings, and the concentrate tailings are returned to the high-ars...

Embodiment 3

[0060] The lead content in the treated lead concentrate is 62.60%, and the arsenic content is 0.87%.

[0061] (1) Add 1100g / ton of lead concentrate to lead concentrate and add sodium sulfide to adjust the slurry. After slurry adjustment, the slurry potential is -119mv, and the pH value is 8.97.

[0062] (2) Add fulvic acid, humate, bleaching powder and sodium sulfite with a mass ratio of 2:8:20:60 combined inhibitor and modified ethylthiourethane and diesel with a mass ratio of 1:2 The collector is used for roughing high-arsenic lead to obtain high-arsenic lead rough concentrate and rougher tailings. The addition amount of combined inhibitor is 3000g / ton of lead concentrate, and the addition amount of modified ethylthiourethane collector is 150g / ton of lead concentrate.

[0063] (3) The high-arsenic-lead rough concentrate is subjected to a beneficiation to obtain a concentrate and concentrate tailings, and the concentrate tailings are returned to the high-arsenic-lead roughin...

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Abstract

The invention relates to a method for removing arsenic in lead concentrate, and belongs to the technical field of mineral processing. The method for removing arsenic in lead concentrate comprises the steps that sodium sulfide is added into lead concentrate for size mixing, and then an inhibitor and a collecting agent are added for high-arsenic lead roughing, wherein the inhibitor is any one or a combination of more of fulvic acid, humate, bleaching powder and sodium sulfite, the collecting agent is modified ethionine ester, and high-arsenic lead rough concentrate and rough tailings are obtained through high-arsenic lead roughing; the high-arsenic lead rough concentrate is subjected to concentration at least one time to obtain a high-arsenic lead concentrate product; and the roughing tailings are scavenged at least once to obtain a low-arsenic lead concentrate product, wherein the arsenic grade in the obtained low-arsenic lead concentrate product is lower than 0.4%. According to the invention, the low-arsenic lead concentrate product can be obtained, and the method has the advantages of being simple in process, friendly in agent, low in energy consumption, short in technological process, friendly to environment and the like.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for removing arsenic from lead concentrate. Background technique [0002] Excessive arsenic content in lead concentrate will seriously affect the quality of smelted products, and arsenic will also produce harmful substances during the smelting process, corrode equipment and pollute the atmosphere. At present, a lot of research has been done on the removal of arsenic from lead concentrate, and some achievements have been made. [0003] The current ore dressing method for arsenic reduction is mainly aimed at the reduction of arsenic-containing minerals such as pyrite, realgar and arsenopyrite. For example, the Chinese patent with the notification number CN105251620B discloses a complex arsenic-containing lead-zinc sulfide mineral processing method, which can obtain qualified lead and zinc concentrate products containing arsenic, and can improve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D1/012
CPCB03D1/018B03D1/012B03D2201/06B03D2201/02Y02P10/20
Inventor 高连启张红英惠世和刘志成刘进郎召有何艳平罗进刘牡丹徐少华
Owner YUNNAN CHIHONG ZINC & GERMANIUM