Beneficiation method for separating molybdenum-tungsten oxide ore and molybdenum sulfide ore from molybdenum tungsten ore

A mineral processing method, molybdenum oxide technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of high processing cost, unfriendly environment, low hardness, etc., achieve simple mineral processing process, stable process flow, easy The effect of implementation

Inactive Publication Date: 2016-11-09
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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AI Technical Summary

Problems solved by technology

A large number of production practices have shown that the separation effect of molybdenum and tungsten ore in the oxidized part is poor, and the clay, dolomite, calcite and other calcium-magnesium-containing gangue minerals in the ore are mostly small in hardness, and they are preferentially crushed in the grinding process to form ore slime , easy inclusion and entrainment during flotation, thus deteriorating the foam flotation index, resulting in poor flotation separation effect, and difficult to meet the needs of further processing
The second is to separate molybdenum and tungsten through the molybdenum chemical process. Since more than 75% of the gangue minerals in the ore are carbonates, they are directly leached with hydrochloric acid or sulfuric acid. The treatment cost is high and it is not friendly to the environment.

Method used

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  • Beneficiation method for separating molybdenum-tungsten oxide ore and molybdenum sulfide ore from molybdenum tungsten ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The present embodiment selects the high skarn mixed ore as the ore dressing raw material, wherein the percentage of skarn is 65%, the percentage of porphyry is 35%, and the grade of molybdenum in the raw ore is 0.11%, WO 3 The grade of TFe is 0.21%, and the content of TFe is 6.87%.

[0046] The high skarn mixed ore is roughly crushed in a primary crusher (gyratory crusher or jaw crusher) to obtain molybdenum-tungsten ore dressing raw materials, wherein the crushing particle size is 50mm. The molybdenum and tungsten ore raw materials after the coarse crushing step are sieved in a screening equipment (self-centering sieve or circular vibrating sieve) with a sieving particle size of 10 mm. Then, the underscreen product of one stage of sieving step is subjected to two magnetic separation treatments.

[0047] The on-screen product after a stage of sieving step is carried out in the medium crushing crusher (cone crusher, compound crusher or jaw crusher) for medium crushing, ...

Embodiment 2

[0056] This embodiment selects molybdenum-tungsten ore containing low iron as the ore dressing raw material, and mainly porphyry, wherein the percentage of skarn is 23%, the percentage of porphyry is 77%, and the grade of molybdenum in the raw ore is 0.25%, WO 3 The grade is 0.08%, and the content of TFe is 3.17%.

[0057] The molybdenum-tungsten ore containing low iron is roughly crushed in a primary crusher (gyratory crusher or jaw crusher) to obtain molybdenum-tungsten ore dressing raw materials, wherein the crushing particle size is 70mm. The molybdenum and tungsten ore raw materials after the rough crushing step are screened in a screening equipment (self-centered sieve or circular vibrating sieve) with a sieving particle size of 15 mm. Then, the underscreen product of one stage of sieving step is subjected to two magnetic separation treatments.

[0058] The on-screen product after a stage of sieving is carried out in a secondary crushing machine (cone crusher, compound...

Embodiment 3

[0068] The present embodiment selects the mixed ore of skarn and porphyry with high iron content, wherein the percentage of skarn is 55%, the percentage of porphyry is 45%, and the grade of molybdenum in the raw ore is 0.17%, WO 3 The grade of TFe is 0.11%, and the content of TFe is 5.08%.

[0069] The skarn and porphyry mixed ore with high iron content is roughly crushed in a primary crusher (gyratory crusher or jaw crusher) to obtain molybdenum and tungsten ore dressing raw materials, wherein the crushing particle size is 120mm. The molybdenum and tungsten ore raw materials after the coarse crushing step are sieved in a screening equipment (self-centered sieve or circular vibrating sieve) with a sieving particle size of 25 mm. Then, at least two magnetic separation treatments are performed on the undersized product of a screening step, which may be three times, four times or more times.

[0070] The on-screen product after a stage of sieving step is carried out in the inter...

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Abstract

The invention relates to a beneficiation method for separating molybdenum-tungsten oxide ore and molybdenum sulfide ore from molybdenum tungsten ore. The beneficiation method comprises the steps that magnetic separation is conducted on raw separation molybdenum sulfide ore at least twice, so that the raw separation molybdenum sulfide ore subjected to magnetic separation is divided into magnetic ore containing molybdenum-tungsten oxide and non-magnetic ore containing molybdenum sulfide; and a molybdenum-tungsten oxide flotation process is conducted on the magnetic ore, and a molybdenum sulfide flotation process is conducted on the non-magnetic ore, so that molybdenum-tungsten oxide concentrate and molybdenum sulfide concentrate are obtained. According to the beneficiation method for separating the molybdenum-tungsten oxide ore and the molybdenum sulfide ore from the molybdenum tungsten ore, the magnetic ore containing molybdenum-tungsten oxide and the non-magnetic ore containing molybdenum sulfide are separated out before ore grinding by means of the magnetic characteristic of iron-bearing ore in skarn in a magnetic separation and flotation combined way, so that the floatability of the ore is improved, the beneficiation feed grades of the molybdenum sulfide ore and the and molybdenum-tungsten oxide ore subjected to flotation are increased, and a subsequent flotation technological process is simplified; and in addition, grading index fluctuation caused by the change of the characteristics of the ore is reduced, and the mine production cost can be reduced easily.

Description

technical field [0001] The invention relates to a physical mineral processing method, in particular to a mineral processing method for separating oxide molybdenum tungsten ore and molybdenum sulfide ore in molybdenum tungsten ore. Background technique [0002] Molybdenum deposits are divided into four categories: porphyry-type molybdenum deposits, skarn-type molybdenum deposits, porphyry copper-molybdenum deposits and other molybdenum deposits. Other molybdenum deposits are ores with high oxidation rate and low molybdenum grade, which exist in contact metamorphic rocks, pegmatites and sedimentary rocks. The ore deposits often contain minerals of other elements such as tungsten, bismuth, uranium, etc. There are few researches on them at home and abroad. Low. [0003] At present, there are few industry precedents for the sorting and extraction of molybdenum oxide ores, especially molybdenum oxide ores associated with tungsten. At this stage, there are two kinds of beneficiati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C23/14B03C1/00B03D1/00
CPCB02C23/14B03C1/00B03D1/00
Inventor 常学勇赵平张艳娇刘广学邵伟华马驰王力
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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