Ocean polymetallic nodule and arsenious gold ore mixing pretreatment method

A polymetallic nodule and pretreatment technology, applied in the field of non-ferrous metallurgy, can solve the problems of long gold extraction process, low gold recovery rate, and low utilization rate of arsenic gold ore, and achieve improved leaching rate, high extraction rate, and simple process Effect

Inactive Publication Date: 2015-09-23
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the problems of low utilization rate of existing oceanic manganese nodule processing met...

Method used

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  • Ocean polymetallic nodule and arsenious gold ore mixing pretreatment method
  • Ocean polymetallic nodule and arsenious gold ore mixing pretreatment method
  • Ocean polymetallic nodule and arsenious gold ore mixing pretreatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An arsenic-containing gold concentrate in Yangshan, Gannan, containing 45.67g / t of gold, and other chemical components are shown in the table below.

[0035]

[0036] Take 100g of oceanic polymetallic nodules and 200g of arsenic-containing gold concentrate and mix evenly (the mass ratio of oceanic polymetallic nodules to arsenic-containing gold concentrate is 0.5:1), add 40% H 2 SO 4 The solution was reacted at 90° C. in a water bath for 3 hours. After cooling, it was taken out and filtered. The manganese leaching rate was 93.05%, the iron leaching rate was 92.28%, the cobalt leaching rate was 92.39%, the nickel leaching rate was 91.77%, and the copper leaching rate was 87.54%. The filter residue was slurried with sodium cyanide solution and calcium oxide. The pH of the slurry was 9, the concentration of sodium cyanide was 5%, aerated and stirred and leached for 48 hours, and the gold leaching rate was 72.16%. Add sulfuric acid to the reverse osmosis concentrate to ...

Embodiment 2

[0038] An arsenic-containing gold mine in Henan contains 36.54g / t of gold, and other chemical components are shown in the table below.

[0039]

[0040] Take 1000g of oceanic polymetallic nodules and 200g of arsenic-containing gold concentrate and mix evenly (the mass ratio of oceanic polymetallic nodules to arsenic-containing gold concentrate is 5:1), add 30% H 2 SO 4 The solution was reacted at 150° C. in an oil bath for 6 hours. After cooling, it was taken out and filtered. The manganese leaching rate was 56.17%, the iron leaching rate was 55.42%, the cobalt leaching rate was 58.06%, the nickel leaching rate was 55.69%, and the copper leaching rate was 51.30%. The filter residue was mixed with sodium cyanide solution and calcium oxide, the pH of the slurry was 11, the concentration of sodium cyanide was 5%, aeration and stirring leaching for 96 hours, the gold leaching rate was 93.87%. Add sulfuric acid to the reverse osmosis concentrate to adjust the pH=1.5, and then t...

Embodiment 3

[0042] The arsenic-bearing gold mine in Guigang, Guangxi contains 70.7g / t of gold, and other chemical compositions are shown in the table below.

[0043]

[0044] Take 300g of oceanic polymetallic nodules and 200g of arsenic-containing gold concentrate and mix evenly (mass ratio of oceanic polymetallic nodules to arsenic-containing gold concentrate is 1.5:1), add 5% H 2 SO 4The solution was reacted at 50°C in a water bath for 4 hours, and after cooling, it was taken out and filtered. The manganese leaching rate was 77.8%, the iron leaching rate was 76.59%, the cobalt leaching rate was 78.02%, the nickel leaching rate was 76.43%, and the copper leaching rate was 72.95%. The filter residue was mixed with sodium cyanide solution and calcium oxide. The pH of the slurry was 10, and the concentration of sodium cyanide was 5%. After aeration and stirring for leaching for 24 hours, the gold leaching rate was 84.65%. Add sulfuric acid to the reverse osmosis concentrate to adjust pH...

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Abstract

The invention discloses an ocean polymetallic nodule and arsenious gold ore co-utilization method. Ocean polymetallic nodules and arsenious gold ore are utilized together through mixed acid leaching by means of the oxidability and reducibility of main minerals in ocean polymetallic nodules and arsenious gold ore. In the process, manganese dioxide is reduced, and ions like cobalt ions, nickel ions and copper ions are released; meanwhile, ultrafine gold particles wrapped in arsenopyrite are exposed, and the gold leaching rate of follow-up cyanide leaching is increased. According to the method, waste water containing cyanogens and heavy metal can also be treated by means of the microorganism electrochemical method to achieve closed circulation. The process is simple, the extraction rate is high, environment friendliness is realized, and application prospects are broad.

Description

technical field [0001] The invention belongs to the field of nonferrous metallurgy, and in particular relates to a process method for jointly leaching oceanic polymetallic nodules and arsenic-containing gold ore to improve metal utilization. Background technique [0002] Oceanic manganese nodules are often found in the surface layer of the seabed at 4000-6000m, and its total reserves are estimated to be no less than 3 trillion tons. Manganese is an important metal element widely used in steel, non-metal, electronic materials, agriculture and animal husbandry and other chemical products. In recent years, with the rapid development of the steel industry, the demand for manganese has risen rapidly, and a large number of high-quality manganese ore resources have been rapidly consumed. Therefore, manganese in oceanic manganese nodules has attracted more and more attention from people, such as Lin Zugeng, You Jinkua et al. Oceanic manganese nodules are used as manganese oxide pow...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B11/08C02F1/46
CPCY02P10/20
Inventor 李浩然吴梦妮杜竹玮郭成林李洪珊袁飞
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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