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Pressure leaching method of molybdenum-nickel paragenetic raw ore

A molybdenum-nickel and leaching technology is applied in the field of pressurized oxidation and alkali leaching to treat molybdenum-nickel symbiotic raw ore, which can solve the problems of low recovery rate of molybdenum and nickel, low production efficiency and high production cost, and achieve environmental friendliness and alkali concentration. Low, effective separation

Inactive Publication Date: 2010-12-01
云南冶金集团股份有限公司技术中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The extensive use of organic extractants in this process increases the cost and pollutes the environment at the same time
Chinese patent 1267740A discloses a molybdenum-nickel salt production process that uses a weak base and an oxidant to directly leach molybdenum-nickel symbiotic raw ore. The total recovery rates of molybdenum and nickel are above 80% and 88% respectively, and the recovery rates of molybdenum and nickel are not high.
However, this method has the problems of low production efficiency and low recovery rate.
[0005] In summary, the prior art methods for processing nickel-molybdenum symbiotic ore have technical defects such as complex process, high production cost, polluting the environment, and low recovery rate.

Method used

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  • Pressure leaching method of molybdenum-nickel paragenetic raw ore
  • Pressure leaching method of molybdenum-nickel paragenetic raw ore
  • Pressure leaching method of molybdenum-nickel paragenetic raw ore

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Effect test

Embodiment 1

[0040] In this embodiment, the molybdenum-nickel symbiotic raw ore composition used is as follows: Mo 4.0%, Ni 4.0%, and 90% of the molybdenum-nickel symbiotic raw ore is finely ground and passed through a 0.044mm sieve.

[0041] Add the finely ground molybdenum-nickel symbiotic raw ore powder and 9wt% sodium hydroxide solution into the reaction vessel at a liquid-solid ratio of 3:1. After sealing the reaction vessel cover, start heating with steam to heat up, and start stirring and ventilation at the same time. Oxygen at a concentration of 92 vol% was introduced to make the pressure in the reaction vessel 0.6 MPa, and the temperature reached 110° C., and the temperature was maintained for 120 minutes. After leaching, close the intake valve and open the exhaust valve. After cooling to 90°C with cooling water, open the discharge port to release the leached pulp. After solid-liquid separation, the leaching solution undergoes conventional purification—ion exchange—desorption—trans...

Embodiment 2

[0044] In this embodiment, the molybdenum-nickel symbiotic raw ore composition used is as follows: Mo 5.0%, Ni 0.7%, and 90% of the molybdenum-nickel symbiotic raw ore is finely ground and passed through a 0.044mm sieve.

[0045] Add the finely ground molybdenum-nickel symbiotic ore powder and 11wt% sodium hydroxide solution into the reaction vessel at a liquid-to-solid ratio of 4:1, seal the cover of the reaction vessel, start heating with steam, and start stirring and ventilation at the same time. Oxygen at a concentration of 93vol% was introduced to make the pressure in the reaction vessel 0.8MPa; after the temperature reached 120°C, the temperature was maintained for 105 minutes. After leaching, close the oxygen inlet valve and open the exhaust valve. After cooling to 92°C with cooling water, open the discharge port to release the leached pulp. After solid-liquid separation, the leaching solution undergoes conventional purification—ion exchange—desorption—transformation—eva...

Embodiment 3

[0048] In this embodiment, the composition of the molybdenum-nickel symbiotic raw ore used is as follows: Mo6.0%, Ni2.1%, and 90% of the molybdenum-nickel symbiotic raw ore is finely ground and passed through a 0.044mm sieve.

[0049] Add the finely ground molybdenum-nickel symbiotic ore powder and 12wt% sodium hydroxide solution into the reaction vessel at a liquid-to-solid ratio of 4:1. Oxygen with a concentration of 94vol% makes the pressure in the reaction vessel 1.0 MPa; after the temperature reaches 130° C., it is kept for 90 minutes. After leaching, close the oxygen inlet valve and open the exhaust valve, cool to 95°C with cooling water, open the discharge port, release the leached pulp, and separate the solid and liquid. Molybdenum oxide is produced from the leaching solution through conventional purification-ion exchange-desorption-transformation-evaporation and crystallization; the leaching slag is used as the raw material for nickel smelting.

[0050] The indicator...

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Abstract

The invention provides a method for separating molybdenum and nickel from molybdenum-nickel sulfide paragenetic raw ore by pressure oxidation and alkaline leaching, comprising the following steps: adding the molybdenum-nickel paragenetic raw ore and sodium hydroxide solution into a reaction vessel; introducing oxygen-enriched gas into the reaction vessel, and controlling pressure at 0.6MPa-1.2MPa and temperature at 110-150DEG C in the reaction vessel respectively to obtain leaching pulp; carrying out liquid-solid separation on the leaching pulp to form leaching solution and leaching residue; treating the leaching solution to obtain the molybdenum or a molybdenum-containing compound; and smelting the leaching residue to obtain the nickel or a nickel-containing compound. The method can strengthen the leaching process to achieve the purpose of efficiently leaching the molybdenum in the molybdenum-nickel sulfide paragenetic raw ore, while the nickel is almost fully retained in the leaching residue, thus effectively realizing separation of the molybdenum and the nickel.

Description

technical field [0001] The invention relates to a hydrometallurgical technology of molybdenum-nickel symbiotic raw ore, in particular to a method for treating molybdenum-nickel symbiotic raw ore by means of pressurized oxidation and alkali leaching. Background technique [0002] Nickel-molybdenum symbiotic ore contains a variety of metal elements and has high economic value. However, due to its complex composition and relatively low grade, it is difficult to effectively enrich the useful components by using traditional physical and chemical beneficiation techniques, and No applicable ready-made industrial production technology. [0003] At present, the methods of extracting molybdenum from nickel-molybdenum ore are limited to traditional roasting-leaching, electric furnace smelting and other processes. The roasting-leaching process is to oxidize and roast first, and then extract molybdenum with ammonia or alkali. In addition, two roasting methods can also be used, first ox...

Claims

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Application Information

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IPC IPC(8): C22B3/12C22B23/00C22B34/34
CPCY02P10/20
Inventor 王吉坤彭建蓉杨大锦吴文东阎江峰
Owner 云南冶金集团股份有限公司技术中心
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