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Combined extraction method for arsenic in high-arsenic manganese ore tailings

A high-arsenic manganese ore and combined extraction technology, which is applied in the direction of improving process efficiency, can solve the problems of not finding open documents, etc., and achieve good economic benefits, saving and protecting the environment, and saving production water.

Inactive Publication Date: 2013-01-30
广西壮族自治区地质矿产测试研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] After searching, we did not find any public literature on the electrolytic extraction of arsenic from manganese ore tailings containing high arsenic

Method used

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  • Combined extraction method for arsenic in high-arsenic manganese ore tailings

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Experimental program
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Effect test

Embodiment 1

[0026] The Algerian high-arsenic manganese ore tailings raw material with a grade weight of 10.2% was ground with a ball mill, and the particle size of 60% of the weight was controlled to be -200 mesh, and put into the leaching equipment. Sulfuric acid weight 0.8t / t, oxidant H 2 o 2 The dosage weight is 1Kg / t, the leaching time is 1 hour, and the arsenic grade weight in the leaching residue is controlled to be ≤0.5%. The arsenic leaching solution is used for electrolysis, and the leaching residue is treated and discharged with milk of lime. The arsenic leaching solution is put into the electrolysis equipment for electrolytic reduction. The electrolysis uses a graphite plate anode and a titanium plate cathode. The electrolysis time is 36 hours and the plate area is 15m2. 2 / m 3 , the distance between the plates is 15mm, and the current density is 500A / m 2 , control the weight of arsenic in the electrolytic crude arsenic product to 25.8%, and the electrolytic recovery rate r...

Embodiment 2

[0028] Grind the high-arsenic manganese ore tailings raw material with a grade weight of 9.6% with a ball mill to control the particle size of 60% of the weight to -200 mesh, put it into the leaching equipment, prepare the pulp with a weight concentration of 60%, and use sulfuric acid with a weight concentration of 98% Weight 0.8t / t, oxidant H 2 o 2 The dosage weight is 0.95Kg / t, the leaching time is 1.2 hours, and the weight of arsenic grade in the leaching residue is controlled to be ≤0.5%. The arsenic leaching solution is used for electrolysis, and the leaching residue is treated and discharged with milk of lime. The arsenic leaching solution is put into the electrolytic equipment for electrolytic reduction. The electrolysis uses graphite plate anode, titanium plate cathode, and the plate area is 15m 2 / m 3 , the distance between the plates is 15mm, and the current density is 480A / m 2 , The electrolysis time is 35 hours, the weight of arsenic in the electrolytic crude a...

Embodiment 3

[0030] Grind the Algerian high-arsenic manganese ore tailings raw material with a grade weight of 10.5% with a ball mill, and control the particle size of 60% of the weight to be -200 mesh, and put it into the anti-corrosion leaching equipment. The weight concentration of the prepared pulp is 40%, and the weight concentration is 98%. The sulfuric acid is 0.8t / t, the oxidant H 2 o 2 The dosage weight is 1.1Kg / t, the leaching time is 1.5 hours, and the arsenic grade weight in the leaching residue is controlled to be ≤0.5%. The arsenic leaching solution is used for electrolysis, and the leaching residue is treated and discharged with milk of lime. Put the arsenic leaching solution into the electrolytic cell equipment for electrolytic reduction. The electrolysis uses graphite plate anode, titanium plate cathode, and the plate area is 15m 2 / m 3 , the distance between the plates is 15mm, and the current density is 525A / m 2 , The electrolysis time is 35 hours, the arsenic conten...

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Abstract

The invention discloses a combined extraction method for arsenic in high-arsenic manganese ore tailings, which is characterized by comprising the following steps of: dissolving arsenic minerals in the high-arsenic manganese ore tailings which have the arsenic grade weight of between 9 and 11 percent and serve as a raw material by an acid leaching-electrolysis-sublimation process combined process and a wet-type chemical leaching process, reducing arsenic in leachate to form simple substance arsenic by an electrolysis method, and purifying by a sublimation method further to obtain an arsenic product. By the method for extracting the arsenic, the recovery rate is high, the leaching rate of arsenic weight is more than or equal to 95 percent, the purity of the arsenic product weight is more than or equal to 80 percent, and the quality of the product is high; waste water of electroreduction operation returns the leaching operation to be recycled, so water for production is saved, and the environment is protected; leaching slag is processed by using alkali, and sublimation slag meets the discharge standard, so the method is environment-friendly, and has the good economic, social and ecological benefits. The method is suitable for producing high-purity arsenic products by arsenic ore tailings which are similar to fluorine-containing adelite CaMg(F / AsO4).

Description

technical field [0001] The invention relates to a method for jointly extracting arsenic from high-arsenic manganese ore tailings containing fluorine-arsenic calcium magnesium. Background technique [0002] Algeria (Guettara) manganese ore is a high-arsenic manganese ore, which contains 37.05% manganese and 4.95% arsenic. Algerian manganese ore has two very special characteristics: one is that it is not a common manganese oxide or manganese carbonate ore in China, but a manganese silicate Mn 6 (O 8 / SiO 4 ) ore; the second is that it contains extremely high arsenic minerals. This arsenic mineral is not a common arsenic sulfide mineral in China, such as arsenopyrite, realgar, orpiment, but a rare fluoroarsenite CaMg(F / AsO 4 ), and the particle size of arsenic mineral embedding is extremely fine, and the arsenic content in the tailings obtained after beneficiation is 10.21% by weight. In order to develop and utilize the arsenic mineral resource, the present invention uses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B30/04C22B3/08
CPCY02P10/20
Inventor 陈剑锋雷满奇阳国运杜杰陈安元赵晶
Owner 广西壮族自治区地质矿产测试研究中心
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