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Molybdenum concentrate screening method

A screening method and technology of molybdenum concentrate, applied in the direction of cyclone device, etc., can solve the problems of low utilization rate of resources, low recovery rate of molybdenum concentrate, etc., achieve high equipment utilization rate, reduce application cost, and high work efficiency

Active Publication Date: 2013-11-13
ZHEJIANG TAIZHENG MOLYBDENUM IND DEVCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the deficiencies of low resource utilization rate and low recovery rate of molybdenum concentrate in the molybdenum concentrate screening method in the prior art, and provide a screening method for molybdenum concentrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for screening molybdenum concentrate, said method comprising the following steps:

[0027] (1) Pretreatment of molybdenum raw ore: the molybdenum raw ore with a particle size of 500mm is crushed by two stages and one closed circuit to obtain fine ore with a particle size of about 10mm. After coarse crushing and then coarse screening by vibrating screen, the molybdenum raw ore retained by the vibrating screen is finely crushed by the cone crusher and then returned to the vibrating screen for screening until all the molybdenum raw ore passes through the vibrating screen. The selected grade of the molybdenum raw ore is 0.2% ;

[0028] (2) Grinding and grading: the fine ore in step (1) is processed through a closed-circuit grinding process to obtain a grinding product, and the particle size of the grinding product is 200 mesh, accounting for 50%, and then closed-circuit through a hydrocyclone Grading, obtaining overflow;

[0029] (3) Flotation: add flotation agen...

Embodiment 2

[0033] A method for screening molybdenum concentrate, said method comprising the following steps:

[0034] (1) Molybdenum raw ore pretreatment: the molybdenum raw ore with a particle size of 50mm is crushed by two stages and one closed circuit to obtain fine ore with a particle size of about 10mm. After coarse crushing and then coarse screening by vibrating screen, the molybdenum raw ore retained by the vibrating screen is finely crushed by the cone crusher and then returned to the vibrating screen for screening until all the molybdenum raw ore passes through the vibrating screen. The selected grade of the molybdenum raw ore is 0.2% ;

[0035] (2) Grinding and grading: the fine ore in step (1) is processed through a closed-circuit grinding process to obtain grinding products, and the particle size of the grinding products is 200 mesh, accounting for 60%, and then closed-circuit through the hydrocyclone Grading, obtaining overflow;

[0036] (3) Flotation: add flotation agent ...

Embodiment 3

[0040] A method for screening molybdenum concentrate, said method comprising the following steps:

[0041] (1) Pretreatment of molybdenum raw ore: the molybdenum raw ore with a particle size of 500mm is crushed by two stages and one closed circuit to obtain fine ore with a particle size of about 10mm. After coarse crushing and then coarse screening by vibrating screen, the molybdenum raw ore retained by the vibrating screen is finely crushed by the cone crusher and then returned to the vibrating screen for screening until all the molybdenum raw ore passes through the vibrating screen. The selected grade of the molybdenum raw ore is 0.2% ;

[0042] (2) Grinding and grading: The fine ore in step (1) is processed through a closed-circuit grinding process to obtain a grinding product, and the particle size of the grinding product is 200 mesh, accounting for 55%, and then closed-circuit through a hydrocyclone Grading, obtaining overflow;

[0043] (3) Flotation: add flotation agen...

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Abstract

The invention relates to a molybdenum concentrate screening method which aims to solve the problems that a molybdenum concentrate screening method in the prior art is low in utilization rate of resources and low in recovery rate of molybdenum concentrates. The method comprises the following steps of: (1) pretreatment on molybdenum raw-ores: carrying out treatment on the molybdenum raw-ores so as to obtain fine ores; (2) ore grinding and grading: carrying out ore grinding on the fine ores so as to obtain an ore grinding product, and then carrying out closed grading on the ore grinding product by using a hydrocyclone so as to obtain an overflow object; (3) flotation: adding a flotation reagent in the overflow object subjected to ore grinding and grading in a flotation column, and carrying out molybdenum ore rough-concentration and dense grading on the obtained mixture so as to obtain a rough concentrate; (4) fine selection: after the rough concentrate obtained in the step (3) is subjected to a regrinding process, carrying out fine selection on the rough concentrate for two times, then carrying out scavenging on the obtained product for three times so as to obtain a molybdenum concentrate; and (5) concentrate dehydration; concentrating the molybdenum concentrate, and carrying out further squeezed dehydration on the molybdenum concentrate so as to obtain a molybdenum concentrate finished product. The screening method disclosed by the invention is high in utilization rate of molybdenum raw-ores; and less waste residues and waste dust are produced in a process of screening, therefore, the production environment is friendly.

Description

technical field [0001] The invention belongs to the technical field of molybdenum ore finishing, and in particular relates to a screening method of molybdenum concentrate. Background technique [0002] Molybdenum is mainly used in the iron and steel industry, and is also widely used in other alloys and chemical industries. It is an important material in the electronics industry. Because it is not eroded by air at room temperature, it does not react with hydrochloride or hydrofluoric acid. Molybdenum is not easy to change, while adding molybdenum can greatly improve the strength, toughness, heat resistance, corrosion resistance and weldability of various alloy steels. With the rapid development of China's economy, the production capacity of molybdenum concentrate in China has been expanding. Molybdenum The output of concentrate is in a trend of rising slightly. However, the current screening method of molybdenum concentrate has a low recovery rate of molybdenum concentrate, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B04C9/00
Inventor 季小华王建仁
Owner ZHEJIANG TAIZHENG MOLYBDENUM IND DEVCO
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