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Wet-process treatment method of tungsten-containing molybdenum oxide rough concentrate

A technology for wet processing and rough concentrate, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of high impurity content, high production and production costs, and achieve the effect of high precipitation rate

Inactive Publication Date: 2011-10-05
中铁资源集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For low-grade tungsten-containing molybdenum oxide coarse concentrate, due to the low grade of molybdenum and high content of impurities such as phosphorus, sulfur, and fluorine, it cannot be directly used in the production of ferromolybdenum or tungsten-containing ferromolybdenum alloy; the traditional molybdenum chemical process cannot completely separate molybdenum from tungsten, it is difficult to produce separate tungsten and molybdenum chemical products
Due to the limited use of low-grade tungsten-containing molybdenum oxide rough concentrate, the sales price of this type of rough concentrate is low, and metal tungsten is not priced, which brings difficulties to the development and utilization of tungsten-containing molybdenum oxide ore
[0004] At present, low-grade molybdenum oxide concentrates containing tungsten are often treated by direct hydrochloric acid leaching to achieve the effect of preliminary separation of tungsten and molybdenum. Gangue minerals (high in impurity phosphorus, sulfur, and fluorine), the method is difficult and the production cost is high

Method used

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Effect test

Embodiment 1

[0030] The raw material is taken from Shengyuan Mining Henan Sanmenxia Chemical Plant, molybdenum oxide and tungsten coarse concentrate molybdenum and tungsten content Mo5.27%, WO 3 1.34%, grind molybdenum and tungsten oxide raw ore to -0.074mm, accounting for 60%, and carry out flotation; combine the use of hydrocyclone classification, cyclone screen, vibrating screen and water flow classifier to classify the obtained mineral particles, Those larger than 0.031mm are coarse-grained grades, and those smaller than or equal to 0.031mm are fine-grained grades. Add fine-grained molybdenum-tungsten oxide ore to water and sodium carbonate for high-pressure leaching. The leaching temperature is 130°C, and the leaching time is 80 minutes. Na 2 CO 3 It is 3 times the theoretical amount, and the liquid-solid ratio is 3; then filter and wash, add mineral acid (pH 3.5) to the obtained filtrate and 1-2 times of washing water for pretreatment, and return 3-4 times of washing water to high ...

Embodiment 2

[0032] The raw material is taken from Jingang Mining Industry, molybdenum oxide and tungsten coarse concentrate molybdenum and tungsten content Mo5%, WO 3 1.4%, grind molybdenum and tungsten oxide raw ore to -0.074mm, accounting for 60%, and carry out flotation; combine the use of hydrocyclone classification, cyclone screen, vibrating screen and water flow classifier to classify the obtained mineral particles, Those larger than 0.031mm are coarse-grained grades, and those smaller than or equal to 0.031mm are fine-grained grades. Add fine-grained molybdenum-tungsten oxide ore to water and sodium carbonate for high-pressure leaching. The leaching temperature is 200°C, and the leaching time is 30 minutes. Na 2 CO 3 It is 1 times the theoretical amount, and the liquid-solid ratio is 1.5; then filter and wash, add mineral acid (pH value 4) to the obtained filtrate and 1-2 times of washing water for pretreatment, and return 3-4 times of washing water to high pressure Leach ingred...

Embodiment 3

[0034] The raw material is taken from a factory of China Railway Resources, molybdenum oxide and tungsten coarse concentrate molybdenum and tungsten content Mo5.02%, WO 3 1.0%, grind molybdenum and tungsten oxide raw ore to -0.074mm, accounting for 60%, and carry out flotation; combine the use of hydrocyclone classification, cyclone screen, vibrating screen and water flow classifier to classify the obtained mineral particles, Those larger than 0.031mm are coarse-grained grades, and those smaller than or equal to 0.031mm are fine-grained grades. Add fine-grained molybdenum-tungsten oxide ore to water and sodium carbonate for high-pressure leaching. The leaching temperature is 150°C, and the leaching time is 60 minutes. Na 2 CO 3 It is twice the theoretical amount, and the liquid-solid ratio is 2; then filter and wash, add mineral acid (pH value 5) to the obtained filtrate and 1-2 times of washing water for pretreatment, and return 3-4 times of washing water to high pressure ...

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Abstract

The invention discloses a wet-process treatment method of tungsten-containing molybdenum oxide rough concentrate, which sequentially comprises the steps of: 1, carrying out sodium carbonate leaching on the tungsten-containing molybdenum oxide rough concentrate; 2, filtering and separating; 3, adding inorganic acid in filtrate obtained from filtration and separation to regulate the pH value to 3.5-6.5; 4, adding a settling agent in a solution subjected to pH regulation, carrying out molybdenum and tungsten settling reaction; and 5, filtering, washing and drying sediment obtained from filtration to obtain a mixture of calcium molybdate and calcium tungstate. The invention has the advantages of higher molybdenum settling rate and lower content of molybdenum in a settled solution, and does not need an ion exchange process.

Description

technical field [0001] The invention relates to a wet processing method of tungsten-containing molybdenum oxide coarse concentrate, which relates to a low-grade molybdenum oxide-tungsten mixed concentrate hydrometallurgy method. Background technique [0002] There are two types of molybdenum ore: molybdenum sulfide ore and molybdenum oxide ore. Molybdenum sulfide ore is enriched into molybdenum concentrate and then roasted and desulfurized to obtain molybdenum oxide concentrate, which is then used to produce ferromolybdenum or molybdenum chemical products; while molybdenum oxide ore is a It is difficult to obtain qualified molybdenum oxide concentrate products. Generally, the molybdenum oxide ore is enriched into rough concentrate through mineral processing methods, and then the qualified molybdenum oxide concentrate is enriched by chemical methods, and then used Ferromolybdenum smelting or processing of molybdenum chemical products. [0003] For low-grade tungsten-containi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 曹耀华王含渊刘红召赵庆云高照国张吉贵杨绍文石玉臣
Owner 中铁资源集团有限公司
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