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Method for producing industry molybdenum oxide from molybdenum concentrate

A technology for industrial molybdenum oxide and molybdenum concentrate is applied in the field of producing industrial molybdenum oxide from molybdenum concentrate, which can solve the problems of difficulty in producing acid with sulfur dioxide, pollution of flue gas and soot, and low recovery rate of molybdenum, and achieves high recovery rate of molybdenum, The effect of high practical value and low input cost

Active Publication Date: 2010-12-15
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for producing industrial molybdenum oxide from molybdenum concentrate, which is reasonable in design, simple in processing steps, convenient in implementation, good in use effect, and high in economic value. The molybdenum recovery rate can reach more than 99%, which can effectively solve the problems of low molybdenum recovery rate, serious flue gas and dust pollution, and low concentration of sulfur dioxide produced in the process of producing industrial molybdenum oxide from high-lead molybdenum concentrate. Practical problems

Method used

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  • Method for producing industry molybdenum oxide from molybdenum concentrate
  • Method for producing industry molybdenum oxide from molybdenum concentrate

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Embodiment 1

[0049] In this embodiment, the selected molybdenum concentrate is a high-lead molybdenum concentrate containing the following elements by weight: Mo: 42.37%, Cu: 0.15%, Pb: 0.25%, Ca: 0.08%, phosphorus: 0.11%, S : 30.15% and Fe: 2.73%. And when the selected molybdenum concentrate is used to produce industrial molybdenum oxide, the production process is as follows:

[0050] Step 1, crushing and grinding the molybdenum concentrate: crushing and grinding the selected molybdenum concentrate to obtain molybdenum concentrate powder with an average particle size below 200 mesh.

[0051] Step 2. Use acid solution to heat up and leach the impurities contained in the molybdenum concentrate powder: mix industrial hydrochloric acid with 200g of the molybdenum concentrate powder at a liquid-solid weight ratio of 5:1, and heat the molybdenum concentrate powder at a temperature of 92°C The industrial hydrochloric acid is used under conditions to leach impurities contained in the molybdenum ...

Embodiment 2

[0068] Such as figure 1 As shown, in this embodiment, the difference from Example 1 is that the collected washing solution described in step 7 is mixed with the mixed slurry 3 described in step 6 to obtain the mixed slurry 4, and then the collected washing solution is extracted. 50% of the above-mentioned mixed slurry quality is used as the pressurized oxidation reaction adding solution when producing industrial molybdenum oxide next time; When the solution is added to the pressurized oxidation reaction, in this embodiment, the quality of ammonium molybdate prepared by using the mixed slurry 4 is 5.6g. And the next production process of producing industrial molybdenum oxide from molybdenum concentrate is as follows:

[0069] 101. Pretreatment process of pressurized oxidation: according to step 1 to step 4, the selected molybdenum concentrate is crushed and ground, heated and leached, hot filtered and powder washed to obtain preliminary purified molybdenum concentrate powder. ...

Embodiment 3

[0078] Such as figure 1 As shown, in the present embodiment, different from Example 2 is: the volume concentration of the industrial hydrochloric acid adopted in the step 2 is 10%, and when carrying out heating up leaching, industrial hydrochloric acid and 200g molybdenum concentrate powder are mixed with liquid-solid weight ratio Mix at a ratio of 4.5:1, and use the industrial hydrochloric acid to leach the molybdenum concentrate powder at a temperature of 90°C to obtain a solid-liquid mixture after acid leaching, and the leaching time is 2.5h; During powder washing, the leached molybdenum concentrate powder described in step 3 is washed multiple times with hot water at 70°C; The solid-liquid weight percentage of the mixed slurry one obtained by adding water to the powder is 15%, and the weight percent of the molybdenum concentrate powder after the initial purification in the mixed slurry one is that the sodium nitrate added in the mixed slurry one is 3%, the pressurized oxi...

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Abstract

The invention discloses a method for producing industry molybdenum oxide from molybdenum concentrate, which comprises the following steps of: 1, crushing and grinding the molybdenum concentrate; 2, performing temperature rise leaching by adopting acid liquor; 3, performing heat filtration; 4, washing powder; 5, pressurizing for oxidization; 6, filtering, and correspondingly obtaining a filter cake and filter liquor; 7, washing the filter cake: washing the filter cake by using water, collecting the washing solution after the washing, mixing the washing solution and the filter liquor in the step 6, obtaining molybdenum solution, taking 10 to 50 percent of the molybdenum solution as pressurized oxidization additive solution for the next pressurized oxidization; and 8, drying and preparing the industry molybdenum trioxide. The method has the advantages of reasonable design, simple processing steps, convenient implementation, good using effect, high economic value, and the molybdenum recovery rate of over 99 percent, and can effectively solve the problems of low molybdenum recovery rate, serious pollution of flue gas and smoke, difficulty in producing acid from the generated low-concentration sulfur dioxide and the like in the process of producing the industry molybdenum oxide from the high-lead molybdenum concentrate in the prior art.

Description

technical field [0001] The invention relates to a method for producing industrial molybdenum oxide, in particular to a method for producing industrial molybdenum oxide from molybdenum concentrate. Background technique [0002] Molybdenum concentrate is the source of various molybdenum terminal products, which is obtained by flotation of molybdenite. In many molybdenum ores and copper-molybdenum ores, molybdenite and copper, lead, and iron sulfide ores are densely symbiotic, and the mechanical inclusion of foam in flotation makes the molybdenum concentrate obtained by flotation contain a certain amount of impurities. Iron, copper and lead in molybdenum concentrate generally occur with pyrite, chalcocite, chalcopyrite, galena, lead-bismuthite, etc. [0003] Nowadays, the method of producing industrial molybdenum oxide from molybdenum concentrate at home and abroad is mainly to oxidize and roast molybdenum concentrate at about 600°C to desulfurize and oxidize molybdenite into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/10C01G39/02C22B34/34
CPCY02P10/20
Inventor 蒋丽娟李来平张新梁静吴贤
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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