Process for extracting and separating nickel-phase form bone coal ore by high pressure oxygen-ammonia leaching

A high-pressure oxygen, stone coal mine technology, applied in the field of molybdenum-nickel symbiotic ore extraction of molybdenum and nickel salts, can solve the problems of environmental pollution, low molybdenum recovery rate, environmental impact, etc., and achieves the improvement of operating environment, high recovery rate, and pollution reduction. Effect

Inactive Publication Date: 2008-05-14
李锋铎
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: ① Due to the large amount of SO produced during the roasting process 2 Gas, which has a serious impact on the environment; ②The recovery rate of molybdenum is low, only about 80%; ③Nickel, copper, and zinc resources have not been fully utilized; ④The operating environment for work

Method used

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  • Process for extracting and separating nickel-phase form bone coal ore by high pressure oxygen-ammonia leaching

Examples

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Example Embodiment

[0024] Example 1:

[0025] Grind nickel-molybdenum ore containing Mo2.75%, Ni0.85% to 80% and pass through a 200-mesh sieve, weigh 100g, add 200g of 25% industrial ammonia water, 100g of water, pass oxygen, at 1.5mPa, temperature 80℃ under the reaction conditions for 5 hours. Then filter, dry the filter residue, the residue weight is 88g, analyze the molybdenum and nickel grades in the residue, respectively: Mo0.1%, Ni0.05%, molybdenum and nickel slag leaching rate are: Mo leaching rate 96.8%, Ni leaching rate 94.8%.

Example Embodiment

[0026] Example 2:

[0027] The nickel-molybdenum ore containing Mo8.4% and Ni3.32% was ground to 80% and passed through a 200-mesh sieve, weighed 100g, added 300g of 25% industrial ammonia water, introduced oxygen, and reacted at 3.0mPa and a temperature of 180°C. 9 hours. Then filter, dry the slag, the slag weighs 71.6g, and analyzes the molybdenum and nickel grades in the slag. rate 95.2%.

Example Embodiment

[0028] Example 3:

[0029] Grind 27 tons of ore to 200 mesh, the average grade of ore powder is: Mo3.02%, Ni2.47%, pulping according to the volume ratio of liquid to solid 3 / 1, the concentration of ammonia water is 14%, at 2.0mPa, the temperature is 100℃ The average reaction time is 4 hours; filter, wash the slag with water, and the filtrate is passed through the ammonia distillation system to recycle ammonia; Saturate the organic phase, re-extract molybdenum with ammonia water to obtain ammonium molybdate solution, and precipitate ammonium tetramolybdate or molybdic acid with acid; extract copper and zinc with 20% P2O4 in the aqueous phase at pH 4.0, wash co-extracted nickel, and back-extract copper Zinc is obtained as a by-product solution of copper and zinc sulfate, and the copper-zinc solution is removed by 20% P2O4 to extract nickel at pH 6.0, and the nickel is back extracted with sulfuric acid to obtain a high-purity nickel sulfate solution, containing an average of 50 g...

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Abstract

The invention relates to a technology of extracting and separating nickel-molybdenum from coal mines through high-pressure oxygen-ammonia immersion. Original ores are ground into powder and then immersed into hartshorn, and then oxygen is fed to cause reaction pressure to be between 1.5mPa-3.0mPa; after reaction and filtration, obtained base solution after ammonia distilling is dissolved by acid, and then organic phase containing molybdenum and water phase containing nickel acquired through extraction and separation are purified respectively. Compared with the prior art, the technology of the invention greatly reduces the environmental pollution, and improves the comprehensive utilization rate of mineral resources, with high recovery rate of valuable metals and high production purity. A semi-commercial experiment demonstrates that the recovery of the nickel-molybdenum all reaches above 90 percent.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy and relates to a method for extracting molybdenum and nickel salts from molybdenum-nickel symbiotic ore. Background technique [0002] Metal molybdenum and nickel are important non-ferrous metals. They are not only used in metallurgical manufacture of alloy steel, but also widely used in chemical industry and other fields. Molybdenum ore has been found in many places in the world, including molybdenite, tungsten-molybdenum symbiotic and copper-molybdenum symbiotic ore, but nickel-molybdenum symbiotic ore has rarely been reported. In the 1960s in my country, it was discovered that Hunan, Guizhou, Yunnan and other places contained a large amount of nickel-molybdenum paragenetic ore. With the shortage of mineral resources, especially the rising prices of molybdenum and nickel products in recent years, the rational and comprehensive utilization of nickel and molybdenum mineral resources can not only cr...

Claims

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Application Information

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IPC IPC(8): C22B3/14C22B1/14C22B3/44C22B3/26C22B23/00C22B34/34
CPCY02P10/20
Inventor 李锋铎
Owner 李锋铎
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