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Preparation method of high-purity superfine metal molybdenum powder

A metal molybdenum powder, high-purity technology, applied in the field of preparing high-purity ultra-fine metal molybdenum powder, can solve the problems of high treatment cost, ecological environment threat, incomplete treatment, etc., and achieve the effects of high added value, emission reduction, and high impurity content.

Inactive Publication Date: 2009-04-01
洛阳开拓者投资管理有限公司
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Problems solved by technology

[0006] Both of the above two methods need to oxidize and roast the molybdenite, but the sulfur dioxide released in the process poses a great threat to the ecological environment. Although the pollution-free treatment of sulfur dioxide in the tail gas can also be carried out at present, the process is complicated and the treatment cost is high. , Incomplete handling and other issues

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  • Preparation method of high-purity superfine metal molybdenum powder
  • Preparation method of high-purity superfine metal molybdenum powder

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[0025] Such as figure 1 Shown: the method for preparing high-purity ultrafine metal molybdenum powder of the present invention, its concrete process step is:

[0026] (1) First, the molybdenite is pelletized by a drum pelletizer with a particle size of about 5mm to 15mm; due to the large amount of gas generated during the vacuum decomposition process, if the particle size of the powder is too small, it is easy to be entrained by the airflow in the vacuum, so , the present invention also needs to make the molybdenite powder into a ball or a block, and the current disc pelletizer or drum pelletizer can produce the pellets required by the present invention, and the particle size is preferably 1mm to 20mm; The pellets are dried; the dried pellets are sent to a high-temperature vacuum furnace for vacuum decomposition. According to research, when the temperature is selected to be 1500°C to 1700°C during the process of decomposing molybdenite in a high-temperature vacuum furnace, the...

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Abstract

The invention discloses a method for preparing high purity superfine metal molybdenum powder, which comprises the following processing steps: (1) molybdenite powder is prepared to be in the shape of sphere or a block; pellets are dried; then, the dried pellets are conveyed in a high-temperature vacuum furnace to be decomposed in vacuum, and molybdenum powder, of which the content of nonferrous metal impurities and S are extremely low is obtained; (2) the spherical molybdenum powder obtained from step (1) is conveyed in an oxidizing-roasting unit and oxidizing roast is carried out, and high-temperature gaseous MoO3 is obtained; (3) the high-temperature gaseous MoO3 is filled in a reduction unit; the gaseous MoO3 is reduced by hydrogen used as a reducing agent, and high purity superfine metal molybdenum powder is obtained. The method solves the problems of the emission and the recovery of waste gas (SO2), synchronously utilizes two resources of molybdenum and sulfur, and avoids the integrated treatment burden and the related emission of SO2 discharged by oxidizing roasting molybdenum concentrate, thus reducing the emission and increasing the combined efficiency of resources.

Description

technical field [0001] The invention belongs to the technical field of molybdenum powder preparation, and in particular relates to a method for preparing high-purity ultrafine metal molybdenum powder by using molybdenite as a raw material. Background technique [0002] Molybdenum is an important strategic resource in my country. It is very rich in resources and its total reserves rank second in the world. Molybdenum is mainly consumed in the iron and steel industry, accounting for about 70% to 80% of molybdenum products. Among them, molybdenum consumed by various structural alloy steels accounts for 43% to 44% of the total molybdenum consumption, and the proportion of molybdenum consumed by stainless steel is 22%. ~23%, molybdenum consumed by tool steel and high-speed steel accounted for about 8%, cast steel and roll consumption accounted for about 6%. Almost all steels contain molybdenum, and its content is generally 0.1% to 10%. This is because molybdenum, as an alloy ad...

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Application Information

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IPC IPC(8): B22F9/22
Inventor 赵维保赵维根郭培民赵龙飞
Owner 洛阳开拓者投资管理有限公司
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