CN1038232A - The manufacturing technology of ultrafine molybdenum powder - Google Patents
The manufacturing technology of ultrafine molybdenum powder Download PDFInfo
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- CN1038232A CN1038232A CN 88103510 CN88103510A CN1038232A CN 1038232 A CN1038232 A CN 1038232A CN 88103510 CN88103510 CN 88103510 CN 88103510 A CN88103510 A CN 88103510A CN 1038232 A CN1038232 A CN 1038232A
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- China
- Prior art keywords
- molybdenum powder
- reduction
- ultrafine
- ultrafine molybdenum
- manufacturing technology
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Inorganic Compounds Of Heavy Metals (AREA)
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Abstract
It is raw material that this law adopts ammonium paramolybdate, uses the double-deck boat that burns, and H2 hangs down dew point, directly carries out the two-stage low-temperature reduction, and (specific surface area reaches 1.6m can to obtain the high-performance ultrafine molybdenum powder
2About/g).This law low cost of manufacture, output capacity height (weight of ultrafine molybdenum powder weight/used molybdenum element reaches more than 95%) is easy to start, and the workshop floor space is little, is suitable for industrial-scale production.
Description
The manufacture method of ultrafine molybdenum powder belongs to the rare metal powder metallurgical technology.Ultrafine molybdenum powder (＜0.5 μ m) manufacture method of having reported at present mainly contains three kinds, i.e. hydrogen molybdenum chloride steaming process also, the ultra-fine molybdenum M that the hydrogen reduction vapour deposition is come out
0O
3Powder method and plasma reduction method.Because these method cost height should not carry out industrial-scale production, so its application is restricted.In addition, also have along H
2Reduction method also can be made ultrafine molybdenum powder, but its output capacity is very low, has only about 25%, so cost is also higher, its industrial application also is restricted.The present invention has overcome the shortcoming of aforesaid method, low cost of manufacture not only, and output capacity height, and go up detective, floor space is little, also can utilize existing general industry molybdenum powder reduction equipment to carry out after part transforms, by this processing method, can the mass production ultrafine molybdenum powder.
The objective of the invention is for lower cost industrial-scale production ultrafine molybdenum powder, so that can produce high performance various molybdenum base and goods thereof at lower cost.Now details are as follows with present method process and performance etc.
It is that raw material is used H through two steps that the present invention adopts ammonium paramolybdate
2Low-temperature heat as reductive agent restores the molybdenum powder that mean particle size is less than or equal to 0.5 μ M.Wherein the ammonium paramolybdate composition is selected for use according to GB3460-82.
The first step reduction process: less than 2.0 μ M, loose specific weight is the 0.4-0.7 gram per centimeter with mean particle size
3Ammonium paramolybdate pack into, have in the bilevel burning boat, and the thickness of every layered material is less than 15 millimeters.With flow is 2-6m
3/ h, the H of dew point≤-30 ℃
2With burn that boat is reverse to reduce, reduction temperature 420-550 ℃ of its reduction reaction is as follows:
The volatile M that has just decomposited
0O
3(420-550 ℃) has little time to volatilize, deposit, bond, grow up at low temperatures, at once by H on every side
2Stream reduces promptly:
Reduced resulting M through 30-120 minute
0O
2Be the false particle of porosity and looseness, in this temperature (420-550 ℃), M
0O
2Saturated vapor pressure very little, not volatile and deposition is grown up.
The second step reduction process: with the first step reductive M
0O
2Pack in the above-mentioned two-layer burning boat, charging thickness is less than 15 millimeters equally.Employed H
2And flow and dew point be same as the first step reduction numerical value, and reduction temperature is 720-850 ℃, and recovery time 30-90 minute, its reaction was as follows:
Because M under this temperature (720-850 ℃)
0O
2Saturated vapor pressure little, it is very little to volatilize, grow up, resulting product is the very frangible false particle molybdenum powder that loosens.
The molybdenum powder productivity of Sheng Chaning (ultrafine powder weight/used molybdenum element weight) is up to more than 95% according to the method described above.Except that the operating process loss, there is not other loss.Its main physical chemical property such as following table of the molybdenum powder of Sheng Chaning according to the method described above:
Physicals:
| Loose density | 0.7-1.2 gram per centimeter 3 |
| Mean particle size | 0.2-0.5???μM |
Chemical Composition (measured value):
| Element | Composition % | Element | Composition % |
| Fe | 0.0048 | Bi | ＜0.0001 |
| Mg | 0.0007 | Ni | 0.00025 |
| Al | 0.0012 | Sn | ＜0.0001 |
| Mn | 0.0006 | Cu | ＜0.0003 |
| Si | 0.0013 | Pb | ＜0.0001 |
| V | 0.0001 | Ca | 0.0001 |
| Sb | 0.0005 | 0 | 0.2-0.8 |
| Ti | ＜0.001 | Molybdenum | Surplus |
Claims (2)
1, a kind of method that is used for making (≤0.5 μ m) metal molybdenum powder is characterized in that with the ammonium paramolybdate being raw material; Use flow 2-6M
3The H of/h dew point≤-30 ℃
2Be reductive agent; Through reduction temperature is 420-550 ℃, and the recovery time is that 30-120 minute once reduction and reduction temperature is 720-850 ℃, and the recovery time is 30-90 minute a secondary reduction.
2, the described method of claim 1 is characterized in that using and double-deckly burns charging thickness on boat and the every layer of burning boat less than 15 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103510 CN1013352B (en) | 1988-06-09 | 1988-06-09 | Manufacturing technique of supper-fine molybdenum powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103510 CN1013352B (en) | 1988-06-09 | 1988-06-09 | Manufacturing technique of supper-fine molybdenum powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1038232A true CN1038232A (en) | 1989-12-27 |
| CN1013352B CN1013352B (en) | 1991-07-31 |
Family
ID=4832634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88103510 Expired CN1013352B (en) | 1988-06-09 | 1988-06-09 | Manufacturing technique of supper-fine molybdenum powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013352B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100421842C (en) * | 2003-03-03 | 2008-10-01 | 川铁矿业株式会社 | Superfine metal powder for surface treatment and producing method thereof, electric conducting metal paste of the same powder and laminated ceramic capacitor using the same paste |
| CN100464902C (en) * | 2007-03-19 | 2009-03-04 | 江苏峰峰钨钼制品股份有限公司 | Method of eliminating potassium impurity from molybdenum powder |
| CN101200000B (en) * | 2007-12-17 | 2010-06-02 | 金堆城钼业股份有限公司 | Method for reducing molybdenum oxide by adjusting dew point of hydrogen |
| CN101966593A (en) * | 2010-11-01 | 2011-02-09 | 金堆城钼业股份有限公司 | Submicron molybdenum powder production method |
| CN114833349A (en) * | 2022-07-04 | 2022-08-02 | 成都虹波实业股份有限公司 | Method for manufacturing low-potassium large-particle-size molybdenum powder |
-
1988
- 1988-06-09 CN CN 88103510 patent/CN1013352B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100421842C (en) * | 2003-03-03 | 2008-10-01 | 川铁矿业株式会社 | Superfine metal powder for surface treatment and producing method thereof, electric conducting metal paste of the same powder and laminated ceramic capacitor using the same paste |
| CN100464902C (en) * | 2007-03-19 | 2009-03-04 | 江苏峰峰钨钼制品股份有限公司 | Method of eliminating potassium impurity from molybdenum powder |
| CN101200000B (en) * | 2007-12-17 | 2010-06-02 | 金堆城钼业股份有限公司 | Method for reducing molybdenum oxide by adjusting dew point of hydrogen |
| CN101966593A (en) * | 2010-11-01 | 2011-02-09 | 金堆城钼业股份有限公司 | Submicron molybdenum powder production method |
| CN114833349A (en) * | 2022-07-04 | 2022-08-02 | 成都虹波实业股份有限公司 | Method for manufacturing low-potassium large-particle-size molybdenum powder |
| CN114833349B (en) * | 2022-07-04 | 2023-01-31 | 成都虹波实业股份有限公司 | Method for manufacturing low-potassium large-particle-size molybdenum powder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1013352B (en) | 1991-07-31 |
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