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Resource utilization process for high pressure oxygen continuous leaching of arsenic sulfide slag

A technology of arsenic sulfide and high-pressure oxygen, applied in the direction of improving process efficiency, etc., can solve the problems of low production efficiency, poor working environment, difficult control, etc., and achieve the effect of high recovery rate

Active Publication Date: 2016-11-09
郴州金铖环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the fire treatment technology has a short process and low cost, the working environment is poor, and it is easy to cause secondary environmental pollution, and the product purity is low, and the recovery rate of arsenic is low
Wet treatment technologies mainly include: copper sulfate replacement method: high treatment cost, complicated process, and low degree of comprehensive utilization; ferric sulfate oxidation leaching method: although the cost is lower than copper sulfate replacement method, but the process is complicated; intermittent high pressure oxygen leaching method: This method combines replacement and oxidation in the same process, and the process flow is simplified compared with the previous two methods. However, because the heating and cooling are carried out in the same equipment, it causes energy waste, low production efficiency, and is difficult to control.

Method used

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  • Resource utilization process for high pressure oxygen continuous leaching of arsenic sulfide slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A high pressure oxygen continuous leaching process for resource utilization of arsenic sulfide slag, comprising the following steps:

[0024] A. Add the arsenic sulfide slag to the waste acid solution for slurrying, start the mixer, adjust the stirring speed to 95rpm, put in the specified amount of raw materials, stir for 1.2 hours, and pump it into the slurry storage tank after the raw materials are completely dispersed and slurried;

[0025] B. Use a hose pump to pump the slurry from the slurry storage tank to the high-pressure reactor, and at the same time use a hose pump to pump the waste acid liquid from the waste acid storage tank to the high-pressure reactor, and feed oxygen into the reactor for 2.2 hours. Generate precipitate as leaching residue;

[0026] C. Recover the leach slag after filtration to recover sulfur, and at the same time lead the leachate from the high-pressure reactor;

[0027] D, reducing the leaching solution with sulfur dioxide, cooling and ...

Embodiment 2

[0038] A high pressure oxygen continuous leaching process for resource utilization of arsenic sulfide slag, comprising the following steps:

[0039] A. Add the arsenic sulfide slag to the waste acid solution for slurrying, start the mixer, adjust the stirring speed to 100rpm, put in the specified amount of raw materials, stir for 1 hour, and pump it into the slurry storage tank after the raw materials are completely dispersed and slurryed;

[0040] B. Use a hose pump to pump the slurry from the slurry storage tank to the high-pressure reactor, and at the same time use a hose pump to pump the waste acid liquid from the waste acid storage tank to the high-pressure reactor, and feed oxygen into the reactor for 2.5 hours. Generate precipitate as leaching residue;

[0041] C. Recover the leach slag after filtration to recover sulfur, and at the same time lead the leachate from the high-pressure reactor;

[0042] D, reducing the leaching solution with sulfur dioxide, cooling and cr...

Embodiment 3

[0053] A high pressure oxygen continuous leaching process for resource utilization of arsenic sulfide slag, comprising the following steps:

[0054] A. Add the arsenic sulfide slag to the waste acid solution for slurrying, start the mixer, adjust the stirring speed to 80rpm, put in the specified amount of raw materials, stir for 1.5 hours, and pump it into the slurry storage tank after the raw materials are completely dispersed and slurried;

[0055] B. Use a hose pump to pump the ore slurry from the slurry storage tank to the high-pressure reactor, and at the same time use a hose pump to pump the waste acid liquid from the waste acid storage tank to the high-pressure reactor, and feed oxygen into the reactor for 2 hours. Generate precipitate as leaching residue;

[0056] C. Recover the leach slag after filtration to recover sulfur, and at the same time lead the leachate from the high-pressure reactor;

[0057] D, reducing the leaching solution with sulfur dioxide, cooling an...

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Abstract

The invention discloses a resource utilization process for high pressure oxygen continuous leaching of arsenic sulfide slag. The arsenic sulfide slag is treated through high pressure oxygen and then is reduced and extracted so that refined arsenic trioxide, copper sulfate and ammonium rhenate can be obtained; meanwhile, obtained waste acid liquid can be recycled for slurrying of the arsenic sulfide slag; and the whole process is high in recycling rate and free of pollution and is a novel and environment-friendly arsenic sulfide slag recycling process.

Description

technical field [0001] The invention relates to the technical field of resource recovery, in particular to a resource utilization process of continuous high-pressure oxygen leaching of arsenic sulfide slag. Background technique [0002] Among all kinds of heavy metal pollution, arsenic pollution is the most serious. Arsenic is often associated with copper, molybdenum, tin, tungsten, zinc and other nonferrous metals, so it often enters the smelting process with nonferrous metal concentrates. According to statistics, about 6,000 tons of arsenic enters the non-ferrous metal smelting process in my country every year. [0003] The flue gas containing arsenic in the non-ferrous metal smelting process must be washed and purified to remove it, and the wastewater generated by washing must be treated before being discharged. The sulfidation precipitation method is a common method for treating heavy metal-containing wastewater. It can not only remove heavy metal ions such as arsenic,...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B30/04C22B15/00C22B61/00
CPCC22B7/007C22B15/0071C22B30/04C22B61/00Y02P10/20
Inventor 郭波平阮茗
Owner 郴州金铖环保科技有限公司
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