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Metallurgical extraction method for molybdenum-tungsten oxide bulk concentrate

A technology of mixing concentrate and extraction method, applied in the direction of improving process efficiency, can solve the problems of low technical and economic indicators, high recovery cost, no recycling, etc., and achieve the effect of simple process, few steps, and high recovery rate

Inactive Publication Date: 2008-07-23
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The beneficiation and metallurgical treatment process of sulfide ore is very mature, but the utilization of some refractory complex molybdenum minerals is still in the exploratory stage
In particular, the resource reserves of molybdenum oxide ore are small, and there is almost no separate molybdenum oxide deposit. However, there are a certain amount of molybdenum oxide ore in major molybdenum mining areas in my country, which are not recycled due to the difficulty of development and utilization.
In foreign countries, only the Institute of Mines of the former Soviet Union has carried out experimental research and industrial experiments on oxidized ores, but due to high recovery costs and low technical and economic indicators, industrial implementation has not been carried out; Preliminary experimental research has been carried out on the rich molybdenum oxide ore, but it has not been developed and utilized

Method used

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  • Metallurgical extraction method for molybdenum-tungsten oxide bulk concentrate

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Experimental program
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Effect test

Embodiment 1

[0024] As shown in the figure, the process of the present invention includes four steps of leaching, oxidation, neutralization and roasting, and the process flow is as follows:

[0025] A. Leaching

[0026] Using molybdenum tungsten oxide ore as raw material, add acid for leaching in the stirring tank covered with acid-proof lining, control the liquid-solid ratio after adding acid between 1:1, control the acid concentration at 50g / L, and leaching The temperature is between 20°C and the reaction time is 1 hour. After the reaction is completed, filter, the molybdenum content in the filtrate is 80g / L, and the washed filter residue is crude tungsten concentrate with increased tungsten content;

[0027] B. Oxidation

[0028] Adding an oxidant to oxidize the low-valent molybdenum to high-valent molybdenum, the weight ratio of the oxidant to the raw material is 1:100;

[0029] C. Neutralize

[0030] Control the neutralization temperature at 20°C, and slowly add 10% ammonium salt a...

Embodiment 2

[0035] As shown in the figure, the process of the present invention mainly includes four steps of leaching, oxidation, neutralization and roasting, and the process flow is as follows:

[0036] A. Leaching

[0037] Using molybdenum tungsten oxide ore as raw material, add acid for leaching in a stirring tank covered with acid-proof lining, control the liquid-solid ratio after adding acid between 1:2, control the acid concentration at 100g / L, and leaching The temperature is between 30°C and the reaction time is 3 hours. After the reaction is completed, filter, the molybdenum content in the filtrate is 90g / L, and the washed filter residue is crude tungsten concentrate with increased tungsten content;

[0038] B. Oxidation

[0039] Adding an oxidizing agent to oxidize the low-valent molybdenum to high-valent molybdenum, the weight ratio of the oxidizing agent to the raw material is 2:100;

[0040] C. Neutralize

[0041] Control the neutralization temperature at 30°C, and slowly ...

Embodiment 3

[0046] As shown in the figure, the process of the present invention mainly includes four steps of leaching, oxidation, neutralization and roasting, and the process flow is as follows:

[0047] A. Leaching

[0048] Using molybdenum tungsten oxide ore as raw material, add acid for leaching in a stirring tank covered with acid-proof lining, control the liquid-solid ratio after adding acid between 1:2~, and control the acid concentration at 150g / L, The leaching temperature is between 50°C and the reaction time is 5 hours. After the reaction is completed, filter, the molybdenum content in the filtrate is 100g / L, and the washed filter residue is crude tungsten concentrate with increased tungsten content;

[0049] B. Oxidation

[0050] Adding an oxidizing agent to oxidize the low-valent molybdenum to high-valent molybdenum, the weight ratio of the oxidizing agent to the raw material is 5:100;

[0051] C. Neutralize

[0052] Control the neutralization temperature at 40°C, and slowl...

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Abstract

The invention discloses a metallurgic extraction method of molybdenum-tungsten oxide ore and bulk concentrate; wherein, the craft adopts molybdenum-tungsten oxide ore as material; the molybdenum-tungsten oxide is leached by acid and filtered; the filter residue is rough concentrate comprising tungsten; a quantitative oxidant is put into the filtrate; the molybdenum blue is oxidized to high valence molybdenum; the neutralization and sedimentation is processed; the precipitate is filtered, dried, and roasted; the molybdenum oxide which comprises molybdenum above 50% is generated. The metallurgic extraction method of molybdenum-tungsten oxide ore and bulk concentrate has the advantages of (1) high recovery rate, simple working procedure, a small quantity of steps, keeping the total recovery rate of molybdenum between 85% and 95%, (2) preliminarily realizing the separation of molybdenum and tungsten, keeping the molybdenum trioxide product comprise tungsten below 0.75% and keeping the leaching residue comprise molybdenum below 0.7% because of the large solubility difference of molybdenum and tungsten in the acid, and realizing the separation of molybdenum and tungsten well.

Description

technical field [0001] The invention relates to a metallurgical extraction method, in particular to a metallurgical extraction method of molybdenum oxide and tungsten mixed concentrate. Background technique [0002] Molybdenum and tungsten resources are the dominant resource minerals in China. my country's molybdenum resource reserves, mining and processing volumes, and trade volumes occupy an important position in the world. In nature, molybdenum mainly exists in the form of sulfides such as molybdenite, while a small amount of molybdenum exists in the form of oxide minerals such as molybdenum, molybdenum calcium ore, molybdenum tungsten calcium ore, and molybdenum lead ore. [0003] The beneficiation and metallurgical treatment process of sulfide ore has been very mature, but the utilization of some refractory complex molybdenum minerals is still in the exploratory stage. In particular, the resource reserves of molybdenum oxide ore are small, and there is almost no single...

Claims

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Application Information

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IPC IPC(8): C22B34/34C22B3/06C22B3/14C22B1/02
CPCY02P10/20
Inventor 杨卉芃刘红召高兆国曹耀华
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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