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Manufacturing method of molybdenum granulated powder and molybdenum granulated powder

A manufacturing method and technology of granulated powder, applied in the manufacture of molybdenum granulated powder and the field of molybdenum granulated powder, to achieve the effect of excellent apparent density and fluidity

Active Publication Date: 2016-10-19
KK TOSHIBA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the finished product rate does not necessarily reach 100%

Method used

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  • Manufacturing method of molybdenum granulated powder and molybdenum granulated powder
  • Manufacturing method of molybdenum granulated powder and molybdenum granulated powder
  • Manufacturing method of molybdenum granulated powder and molybdenum granulated powder

Examples

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Effect test

Embodiment 1～7 and comparative example 1）

[0066] Prepare molybdenum powder (purity: 99.9% or more), polyvinyl alcohol (PVA) powder as a binder, and pure water. Water was poured into a stainless steel container, and polyvinyl alcohol powder was added while heating and stirring the water to dissolve all the added polyvinyl alcohol powder. It has been confirmed that when the polyvinyl alcohol powder is completely dissolved, it becomes a translucent aqueous solution. Then, a total of 40 kg of molybdenum powder was added at a time of 1 to 2 kg. During the stirring of the molybdenum powder, additional pure water was added as necessary to the part which was insufficient due to the evaporation of water. Examples 1 to 5 used polyvinyl alcohol powder as a binder. In addition, Example 6 used polyethylene glycol powder as a binder, and Example 7 used carboxymethylcellulose powder as a binder.

[0067] On the other hand, except having set the heating temperature of water to 35 degreeC, it processed similarly to Example 1, and p...

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Abstract

The invention provides a method for producing molybdenum granulated powder, which is characterized in that it has the following steps: pouring water into a container and heating the water to 50-80°C; adding a binder to the heated water ; The process of preparing a molybdenum-containing aqueous solution by adding molybdenum powder with an average particle size of 1 to 10 μm while stirring water; setting the rotational speed of the rotating plate of the spray dryer for dispersing the above-mentioned molybdenum-containing aqueous solution to A (rpm) , When the average particle size of the granulated powder is set to B (μm), put the above-mentioned molybdenum-containing aqueous solution into a spray dryer with A / B in the range of 50 to 700, and dry while dispersing the above-mentioned molybdenum-containing aqueous solution, Thereby deploying the process of molybdenum granulated powder. According to the said structure, molybdenum granulated powder which has a target average particle diameter can be manufactured efficiently with high yield.

Description

technical field [0001] The invention relates to a method for manufacturing molybdenum granulated powder and molybdenum granulated powder. Background technique [0002] Molybdenum (Mo) is used in various fields as a heat-resistant material due to its high melting point of 2620°C. For example, it has been used as a material for thermal spraying (thermal spraying), plate materials for sintering furnaces, electrode parts, stems for magnetrons, and sputtering targets. There is a method of supplying the material for thermal spraying as Mo powder or Mo rod. In addition, about a plate material, it may manufacture by sintering, and may manufacture by combining rolling and forging. In addition, electrode components and the like are sometimes processed from plate materials, wire processed by drawing, or manufactured by a sintering method. [0003] When Mo is used in this way, there are (1) methods of using Mo directly as powder, (2) methods of using Mo as a sintered sintered body, (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B01J2/04B01J2/28B22F3/02
CPCB22F9/026C22C1/045B22F1/00
Inventor 森冈勉青山齐
Owner KK TOSHIBA