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Process for extracting and separating nickel-molybdenum 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: 2009-10-21
李锋铎
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  • Summary
  • Abstract
  • Description
  • 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 workers is harsh
[0007] CN1177012A adopts the method of roasting desulfurization and decarbonization first, then slaking with 50% sodium carbonate at 700°C, and leaching with water to obtain ammonium molybdate product. This method not only pollutes the environment seriously, but also does not make nickel an industrial product

Method used

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

Examples

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Effect test

Embodiment 1

[0024] Grind nickel-molybdenum ore containing Mo2.75%, Ni0.85% until 80% passes through a 200-mesh sieve, weigh 100g, add 25% industrial ammonia 200g, water 100g, feed oxygen, at 1.5mPa, temperature 80°C Next, react for 5 hours. Then filter, dry filter residue, slag weight 88g, analyze molybdenum nickel grade in the slag, be respectively: Mo0.1%, Ni0.05%, molybdenum, nickel slag meter leaching rate are respectively: Mo leaching rate 96.8%, Ni leaching rate 94.8%.

Embodiment 2

[0026] Grind nickel-molybdenum ore containing Mo8.4%, Ni3.32% until 80% passes through a 200 mesh sieve, weigh 100g, add 25% industrial ammonia water 300g, feed oxygen, at 3.0mPa, temperature 180°C, react 9 hours. Then filter and dry the filter residue, the residue weight is 71.6g, the grade of molybdenum and nickel in the analysis residue is: Mo0.62%, Ni0.22%, the leaching rate of molybdenum and nickel slag is respectively: Mo leaching rate 94.7%, Ni leaching rate The rate is 95.2%.

Embodiment 3

[0028] Grind 27 tons of ore to 200 mesh, the average grade of ore powder is: Mo3.02%, Ni2.47%, pulping according to the liquid-solid volume ratio of 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 residue with water, pass the filtrate through the ammonia distillation system to recover ammonia water; then, add sulfuric acid to dissolve to pH 3.0, extract molybdenum with 10% TFA (tri-fatty amine), wash and extract molybdenum with water Saturate the organic phase, then back-extract molybdenum with ammonia water to obtain ammonium molybdate solution, acid-precipitate ammonium tetramolybdate or molybdenum acid; extract molybdenum aqueous phase with 20% P204 at pH 4.0 to extract copper and zinc, wash and co-extract nickel, and back-extract copper Zinc, get the by-product solution of copper and zinc sulfate, remove copper and zinc solution and extract nickel with 20% P204 at pH 6.0, back extract ...

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Abstract

High-pressure oxygen ammonium leaching is a process for extracting and separating nickel and molybdenum from stone coal mines. The raw ore is ground into powder, immersed in ammonia solution, and oxygen is introduced to make the reaction pressure between 1.5MPa and 3.0MPa. After the reaction, filter and distill ammonia. The bottom solution is dissolved with acid, and then separated by extraction to obtain a molybdenum-containing organic phase and a nickel-containing aqueous phase until purified separately. Compared with the existing process, the process greatly reduces environmental pollution, improves the comprehensive utilization rate of mineral resources, has high recovery rate of valuable metals, and high product purity. Through semi-industrial tests, it has been verified that the recovery rate of molybdenum and nickel has reached more than 90%.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/14C22B1/14C22B3/44C22B3/26C22B23/00C22B34/34
CPCY02P10/20
Inventor 李锋铎
Owner 李锋铎