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Method for efficiently utilizing complex molybdenum ore with wastewater self-circulation

A self-circulation, molybdenum ore technology, applied in the direction of improving process efficiency, can solve the problems of difficult economical and efficient disposal, large amount of waste water, etc.

Active Publication Date: 2020-07-28
中核沽源铀业有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at the problems of the existing complex molybdenum ore without beneficiation and enrichment and direct metallurgy, which cause a large amount of waste water and is difficult to dispose of economically and efficiently. Combining with the characteristics of waste water technology, it proposes a A new method for efficient utilization of complex molybdenum mines with self-circulation of waste water, achieving a molybdenum recovery rate of more than 90% in complex molybdenum mines, and all waste water is recycled in the system

Method used

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  • Method for efficiently utilizing complex molybdenum ore with wastewater self-circulation

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Experimental program
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Effect test

Embodiment 1

[0027] According to the ratio of liquid to solid 3:1.5:1, add dense supernatant: raffinate purification liquid: complex molybdenum ore, wet grind 50kg complex molybdenum ore to particle size -0.074mm>90%, thicken to underflow pulp concentration 30%, thick The supernatant returns to the grinding; dense underflow: the liquid after deamination is pulped at a ratio of 10:1, and then sent to oxygen pressure leaching, according to the H in the solution 2 SO 4 50g / L mixed with concentrated H 2 SO 4 , the leaching temperature is 160°C, the oxidizing agent is O 2 , the leaching process O 2 Partial pressure 0.3MPa, leaching time 3h, molybdenum oxidation rate 99%, molybdenum leaching rate 95%. Molybdenum was extracted with N235 in the leaching solution; the organic matter in the raffinate was naturally clarified + air flotation + ultrasonic demulsification + activated carbon adsorption and other deep degreasing, and the organic matter was reduced to 5ppm, and then Ca(OH) 2 Neutrali...

Embodiment 2

[0029] According to the liquid-solid ratio of 3:2:1, add dense supernatant: raffinate purification liquid: complex molybdenum ore, wet grind 50kg complex molybdenum ore to particle size -0.074mm>90%, thicken to underflow pulp concentration of 35%, dense The supernatant returns to the grinding; thick underflow: the liquid after deamination is pulped at 8:1 and sent to oxygen pressure leaching, according to the H in the solution 2 SO 4 40g / L mixed with concentrated H 2 SO 4 , the leaching temperature is 160°C, the oxidizing agent is O 2 , the leaching process O 2 Partial pressure 0.3MPa, leaching time 3h, molybdenum oxidation rate 99%, molybdenum leaching rate 93%. Molybdenum was extracted with N235 in the leaching solution; the organic matter in the raffinate was naturally clarified + air flotation + ultrasonic demulsification + fiber adsorption + activated carbon adsorption and other deep degreasing, and the organic matter was reduced to 8ppm, and then Ca(OH) 2 Neutraliz...

Embodiment 3

[0031] According to the liquid-solid ratio of 3:1:1, add dense supernatant: raffinate purification liquid: complex molybdenum ore, wet grind 50kg complex molybdenum ore to particle size -0.074mm>90%, thicken to bottom flow pulp concentration of 45%, dense The supernatant returns to the grinding; dense underflow: the liquid after deamination is pulped at 6:1 and sent to oxygen pressure leaching, according to the H in the solution 2 SO 4 40g / L mixed with concentrated H 2 SO 4 , the leaching temperature is 150°C, the oxidizing agent is O 2 , the leaching process O 2 The partial pressure is 0.3MPa, the leaching time is 3.5h, the molybdenum oxidation rate is 96%, and the molybdenum leaching rate is 93%. The leaching solution uses N235 to extract molybdenum; the raffinate is degreased by active carbon adsorption and the organic matter is reduced to 8ppm, and then Ca(OH) 2 Neutralize to pH 8.5, filter and separate the purified solution and return to the ore grinding; load the o...

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Abstract

The invention discloses a method for efficiently utilizing complex molybdenum ore with wastewater self-circulation, and belongs to the technical field of molybdenum comprehensive recovery. The methodaims at the problems such as large wastewater discharging amount and difficulty in economic and efficient treatment caused by the fact that existing complex molybdenum ore is used for metallurgy directly without being subjected to beneficiation enrichment; combined with the characteristics of wastewater process and through the processes of ball milling pulping, oxygen pressure leaching, ammonium molybdate preparation, raffinate purification and recycling and acid precipitation mother liquor purification and recycling from the angles of classification treatment and quality separation recycling,the molybdenum recovery rate in the complex molybdenum ore is 90% or above, and waste water is fully recycled in a system; and the economic development and utilization of the complex molybdenum ore under the current industrial technical background is further realized, and the method has important significance for promoting the green development of the low-grade complex molybdenum ore in China.

Description

technical field [0001] The invention belongs to the technical field of comprehensive recovery of complex molybdenum, and relates to a method for efficient utilization of complex molybdenum ore by self-circulation of waste water, in particular to a new method for extraction and processing of molybdenum ore by efficient circulation of waste water. Background technique [0002] There are a large number of low-grade molybdenum ores in Hebei, Hunan, and Guizhou in my country, and the occurrence state is complex. Molybdenum mainly exists in hydromica and limonite in the form of oxides, accounting for about 80% of the total molybdenum, and part of it is molybdenum-calcium ore. , complex uranium-molybdenum ore, blue-molybdenum ore, etc. There is also a special form of molybdenum mineral-colloidal molybdenum ore in this type of ore, which is colloidal, homogeneous amorphous, colloidal, and colloidal. MoS 2 , due to the order of endogenetic ore, amorphous and colloidal MoS produced in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/28C22B34/34C22B3/22
CPCC22B3/08C22B34/34C22B3/22C22B3/28Y02P10/20
Inventor 程瑞泉林江顺万俊赵磊李映兵王海塔任志刚袁征金凤博高东星霍玉宝刘永涛李平
Owner 中核沽源铀业有限责任公司
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