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A kind of production method and preservation method of ultrafine molybdenum disulfide

An ultra-fine molybdenum disulfide and production method technology, applied in the field of metallurgy, can solve problems such as extended working hours, decreased purity, and increased carbon content of molybdenum disulfide, and achieves the effects of convenient operation, reduced content, and avoiding impact

Active Publication Date: 2018-09-11
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Another object of the present invention is to provide a preservation method for the ultrafine molybdenum disulfide produced by the above method, which solves the problem that the ultrafine molybdenum disulfide is easy to oxidize and fail, and adding antioxidants will increase the spraying rate. Oil and refueling process, the working hours are prolonged, and at the same time, the carbon content of molybdenum disulfide increases and the purity decreases

Method used

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  • A kind of production method and preservation method of ultrafine molybdenum disulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1. Select purified natural molybdenum concentrate, Mo≥58.8%, particle size 20-30μm.

[0038] Step 2. Place the molybdenum concentrate in the air jet mill of the pulverizing system for pulverization, control the air pressure in the pulverizer to 0.6MPa, and the molybdenum disulfide discharge rate to 40kg / h. The pulverized powder is classified in the classifier, and the speed of the classifier is 6000r / min, discharging, and then get ultrafine molybdenum disulfide. During operation, the ambient temperature is controlled at 15°C.

[0039] In step 3, the ultrafine molybdenum disulfide obtained in step 2 is immediately stored at 0°C.

Embodiment 2

[0041] Step 1. Select purified natural molybdenum concentrate, Mo≥58.8%, particle size 20-30μm.

[0042] Step 2: Put the molybdenum concentrate in the airflow mill of the pulverizing system to smash, control the air pressure in the pulverizer to 0.65MPa, and the molybdenum disulfide discharge rate to 45kg / h. The pulverized powder is classified in the classifier, and the speed of the classifier is 7000r / min, discharging, get ultrafine molybdenum disulfide. The ambient temperature is controlled at 17°C during operation.

[0043] In step 3, the ultrafine molybdenum disulfide obtained in step 2 is immediately stored at -7°C.

Embodiment 3

[0045] Step 1. Select purified natural molybdenum concentrate, Mo≥58.8%, particle size 20-30μm.

[0046] Step 2. Place the molybdenum concentrate in the airflow mill of the pulverizing system for pulverization, control the air pressure in the pulverizer to 0.7MPa, and the molybdenum disulfide discharge rate to 50kg / h. The pulverized powder is classified in the classifier, and the speed of the classifier is 8000r / min, discharging, get ultrafine molybdenum disulfide. The ambient temperature is controlled at 20°C during operation.

[0047] In step 3, the ultrafine molybdenum disulfide obtained in step 2 is immediately stored at -15°C.

[0048] Comparing the ultrafine molybdenum disulfide in the example of the present invention with the ultrafine molybdenum disulfide preserved by conventional methods, the MoO stored two months later 3 Content, the results are as follows:

[0049]

[0050] It can be seen from the above table that the ultrafine molybdenum disulfide obtained by the producti...

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Abstract

The invention provides a production method of ultra-fine molybdenum disulfide, specifically: put the molybdenum concentrate in the pulverizer of the crushing system to pulverize, control the air pressure in the pulverizer and the discharge speed of molybdenum disulfide, and the pulverized powder is in the Classify in the classifier, and control the ambient temperature ≤ 20°C during the entire operation process, and discharge the material to obtain ultra-fine molybdenum disulfide. The invention also discloses a preservation method for the ultrafine molybdenum disulfide obtained by the above method. Using the production method of the present invention to obtain molybdenum disulfide superfine powder D50 = 0.4 ~ 1 μm, and simultaneously adopting the method of the present invention for storage can effectively protect the superfine powder from oxidation, reduce the content of molybdenum oxide, and prevent molybdenum disulfide from failing in a short time , affecting its performance. Since no antioxidant is added in the production process, no new process needs to be added in the production process, which is convenient for operation and avoids the influence of additives on the performance of molybdenum disulfide.

Description

Technical field [0001] The invention belongs to the field of metallurgical technology, and relates to a method for producing ultrafine molybdenum disulfide. The invention also relates to a method for preserving the ultrafine molybdenum disulfide produced by the above method. Background technique [0002] Molybdenum disulfide is an important solid lubricant with many advantages. It is especially suitable for use under high temperature, high pressure, heavy load, and diamagnetic environment. It is incomparable to ordinary liquid lubricants. It overcomes some inherent characteristics of liquid lubrication. Disadvantages, such as: lubricating grease is easy to evaporate and cannot work for a long time in a high vacuum; it cannot work in space at a height of 1000km, the oil film is easily damaged under high load, and the lubricating ability is easily lost at high temperatures, so it is known as " King of high-grade solid lubricants". [0003] The production method of molybdenum disulfi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C19/06B02C25/00
Inventor 唐军利
Owner JINDUICHENG MOLYBDENUM CO LTD