Method for treating materiel of containing arsenic

A processing method and material technology, applied in the direction of improving process efficiency, etc., can solve problems such as high impurity content, high processing cost, and no use value

Inactive Publication Date: 2004-10-27
锡矿山闪星锑业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second method is to remove the water from the solution containing arsenic and alkali by concentrating and drying, which not only costs a lot, but also obtains a mixture containing sodium arsenate and alkali. Due to the high content of impurities, the composition fluctuates greatly and is useless.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Water immersion: Take 100Kg of antimony smelting arsenic-containing alkali slag (containing 10% antimony, 3.5% arsenic, and 60% sodium carbonate), add 200 liters of water, pour it into a 300 liter stainless steel reaction tank, stir, and heat it with steam. The solution was heated up to 90°C, reacted for 30 minutes, filtered for the first time, added 100 liters of water to the filter residue and reacted for 50 minutes at a temperature of 90°C, and filtered for the second time. Antimony 23.25%, Arsenic 1.06%. The secondary filtrate is returned for primary leaching. The primary filtrate contained soluble arsenic salts and alkalis. After concentration and drying, 48.91Kg of solids were obtained, containing 1.49% of Sb and 4.56% of As.

[0016] (2). Neutralize ammonia distillation, absorb ammonia and carbonize: Take 3Kg of arsenic-containing alkali solid prepared in the first step, dissolve it in 7.5 liters of water, add 2.6Kg of ammonium sulfate, heat, and when the te...

Embodiment 2

[0019] Get 3Kg of the arsenic-containing alkali solid obtained in step (1) of Example 1, add 7.5 liters of water to dissolve, then add 2.6Kg of ammonium sulfate, put it into a stainless steel bucket, vacuumize, heat, and when the temperature rises to 65 ° C, a large amount of volatilization begins Ammonia and carbon dioxide are released. With the volatilization of ammonia and carbon dioxide, the temperature of the solution continues to rise until no more ammonia is volatilized at around 80°C. The volatilized ammonia and carbon dioxide are absorbed by the mother liquor containing ammonia and carbon dioxide to obtain a saturated ammonia solution containing carbon dioxide.

[0020] Other steps are the same as in Example 1.

Embodiment 3

[0022] Get the arsenic-containing alkali solid 3Kg that the step (1) of embodiment 1 makes, add 7.5 liters of water to dissolve, add 2.1Kg ammonium chloride again, heat, when be warming up to 65 ℃, begin to volatilize ammonia gas and carbon dioxide in a large amount. With the volatilization of ammonia and carbon dioxide, the temperature of the solution continued to rise until no more volatilization of ammonia was made at around 105°C. The volatilized ammonia and carbon dioxide are absorbed with water to obtain a saturated ammonia solution containing carbon dioxide, and then carbon dioxide is introduced to precipitate white solid particles of ammonium bicarbonate, which are filtered to obtain ammonium bicarbonate product.

[0023] Take 3000ml of arsenic-containing alkali solution obtained after ammonia distillation, filter, and filter residue 11g, containing 6.42% antimony. Add 30ml of industrial concentrated hydrochloric acid with a content of 30% to the filtrate, feed hydroge...

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PUM

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Abstract

A process for treating the As-contained alkaline waste dregs includes such steps as immersing in water to remove ash and obtain dregs and As alkali contained solution, returning the dregs back to production line for recovering valuable metals, adding ammonium salt to said solution for neutralizing alkali, heating to volatilize ammonia and CO2, absorbing them by a mother for preparing ammonium hydrogen carbonate or sodium carbonate, adding As precipitant to deposit As, and using the residual solution to prepare sodium salt. Its advantage is no secondary pollution.

Description

technical field [0001] The invention relates to a treatment method for arsenic-containing materials, in particular to a treatment method for arsenic-containing alkaline waste residue. Background technique [0002] Arsenic exists widely in various minerals in nature. In the process of mining, smelting, and extracting various other metals, arsenic becomes an unnecessary impurity and hopes to be removed. According to the property that arsenic is easy to be oxidized, the method of adding alkali to oxidize is often used to remove arsenic. For example, in the process of smelting lead, antimony, and tin, the method of adding alkali to remove arsenic is adopted, such as adding caustic soda or soda ash to remove arsenic, and the arsenic is removed from the main metal, and the arsenic enters the slag and becomes arsenic-containing, other metals (such as antimony, antimony, Lead, etc.), alkali and arsenic-alkali slag such as ash. When pyroprocessing antimo...

Claims

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Application Information

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IPC IPC(8): C22B3/14
CPCY02P10/20
Inventor 康大平戴永俊张忠祖申初云廖佳乐阳新锡刘琼曾燕
Owner 锡矿山闪星锑业有限责任公司
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