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Method for pre-dressing low-grade single molybdenum ore body molybdenite in advance

A low-grade molybdenite technology, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of high grinding costs and increased consumption of flotation agents

Inactive Publication Date: 2012-02-22
中钢矿业开发有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, all the ore enters the flotation system, which will inevitably lead to high grinding costs and increased consumption of flotation agents.

Method used

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  • Method for pre-dressing low-grade single molybdenum ore body molybdenite in advance
  • Method for pre-dressing low-grade single molybdenum ore body molybdenite in advance
  • Method for pre-dressing low-grade single molybdenum ore body molybdenite in advance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Taking a concentrator with a daily processing capacity of 10,000 tons and an ore grade of 0.07% as an example, a comparative analysis of the economic benefits of production using general-purpose technology and patented technology is shown in Table 1.

[0017] Table 1 Economic benefit comparison table

[0018] serial number

[0019] It can be seen from Table 1 that the annual economic benefit of this patented technology can reach 9.03 million yuan compared with the conventional general-purpose technology. The implementation of this patented technology only needs to add a section of screening operation to the original process, which is low in investment and easy to implement. The payback period is only 1.06 months.

Embodiment 2

[0021] The original ore grade of a tuff-type molybdenum ore is Mo0.054%, and the original process flow of on-site grinding and grading is shown in Figure 1. After the raw ore enters the ball mill, the ground product is transported to the classifier (hydrocyclone) by the pump, the underflow of the classifier returns to the ball mill, and the overflow of the classifier enters the subsequent sorting operation. For the preferential dissociation characteristics of molybdenite minerals in the molybdenum ore grinding process, on the basis of the process flow shown in Figure 1, the pre-selection process of the present invention shown in Figure 2 is adopted, and a linear vibrating screen is added behind the ball mill. The material is discarded as waste sand, and is transported to the waste sand storage yard by the belt, the underscreen material is transported to the classifier by the pump, the underflow of the classifier returns to the ball mill, and the overflow of the classifier enter...

Embodiment 3

[0028] The molybdenum grade of a tuff-type molybdenum ore is 0.081%.

[0029] Feed concentration of high-frequency vibrating sieve: 43%, mesh size of high-frequency vibrating sieve: 8mm.

[0030] Adopt the pre-selection process index of the present invention to see Table 3.

[0031] Table 3 Pre-selection results of high-frequency vibrating screen (8mm) for ball mill discharge

[0032] product name

Yield / %

Grade / %

Recovery rate / %

+8mm

8.36

0.025

2.58

-8mm

91.64

0.086

97.42

Ball mill discharge

100.00

0.081

100.00

[0033] Adopt the pre-selection process of the present invention, adopt 8mm sieve hole vibrating screen, the Mo grade of under-sieve particle size (-8mm) is raised to 0.086% by 0.081%, waste sand (+8mm) grade is reduced to 0.025%, and throwing away rate reaches 8.36% %, the loss rate of molybdenum in waste sand is 2.58%. The above results show that a large amount...

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Abstract

The invention relates to the technical field of molybdenum ore dressing, in particular to a method for pre-dressing low-grade single molybdenum ore body molybdenite in advance. In the method, the characteristics of selective crushing and dissociation of molybdenite in the ore grinding process are utilized. A molybdenum ore pre-dressing process comprises one-stage ball milling, sieving and grading, and is characterized by comprising the following steps of: (1) feeding crude ore into one-stage ball milling and sieving an ore milling product; and (2) conveying a sieving oversize material serving as waste sand to a waste sand yard through a belt. The invention has the advantages: a part of rough grain products serving as waste sand in the ore milling product are abandoned in advance according to the selective ore milling phenomenon of molybdenum ore, the selecting grade is raised, the treating capabilities of ore milling and sorting systems are increased, re-milling amount is reduced, ore milling energy consumption is lowered, the cost is reduced, and the economic benefit is enhanced; waste sand can be taken as a building material and the like; in the process, the original flow and the conventional facilities can be utilized, and the refitting workload is low; and the method can be widely applied to molybdenum ore dressing plants.

Description

Technical field [0001] The invention relates to a method for beneficiating molybdenite, in particular to a method for pre-selecting molybdenite with low-grade single molybdenum ore body in advance. Background technique [0002] Molybdenum deposits in China are not only large in scale, but also of various types and low grade. The proven deposits include porphyry type, porphyry-skarn type, skarn type, vein type, sedimentary type and other types. [0003] Generally speaking, the content of molybdenite in the ore is relatively low, and the molybdenite is mostly distributed in the cracks of the ore in the form of flakes, plates, and strips, forming irregular thin-layer or veinlet-like structures, and some fine Granular molybdenite is produced as fibrous crystals, scattered in the tuff matrix or on the edge of crystal debris. [0004] The conventional sorting method for single molybdenum ore is multi-stage grinding + stage flotation or one-stage grinding + flotation, that is, all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00
Inventor 连民杰李学忠马毅敏范才兵吕宪俊李占科时建刚张帅
Owner 中钢矿业开发有限公司
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