CN103128297A - Metal lead powder production method - Google Patents
Metal lead powder production method Download PDFInfo
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- CN103128297A CN103128297A CN2011103855046A CN201110385504A CN103128297A CN 103128297 A CN103128297 A CN 103128297A CN 2011103855046 A CN2011103855046 A CN 2011103855046A CN 201110385504 A CN201110385504 A CN 201110385504A CN 103128297 A CN103128297 A CN 103128297A
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- metal lead
- lead powder
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Abstract
A metal lead powder production method comprises the steps of melting metal, atomizing and the like, wherein the temperature of fusing lead liquid in a metal melting process is controlled at around 425-440 DEG C, a benzotriazole additive is added in the process of atomization, the benzotriazole additive accounts for 0.001%-0.005% of the melted metal lead liquid in weight, and high pressure air flow which is added in the process of the atomization is controlled at about 5-6.5 m <3>/minute (min). According to the metal lead powder production method, an additive is selected in the process of metal lead power production in an atomization method, the properties of the addictive, the interaction between the additive and the metal and the favorable environment of atomization are used, and therefore the additive is atomized to form a protective layer which can avoid oxidation and caking on the surface of the metal lead powder. Metal lead powder products which are produced through the metal lead powder production method are packed with normal packaging, and the oxidative deterioration rate of the metal lead powder products can be controlled within the range of 0.5%-3.5%. Due to the fact that the normal packaging is used, the production cost is reduced effectively, the safety of a production system is good, returned goods rate is reduced greatly, and economic benefit is remarkable.
Description
Technical field
The present invention relates to a kind of production method of metal dust, be specifically related to a kind of atomization production method of metal lead powder, belong to metallurgical technology field.
Background technology
Gas atomization is adopted in the production of metal current lead powder, and its basic production technology is: the first step, the fusing of metal, fusion temperature than melting point metal high 50 ℃～100 ℃; Second step in atomization plant, utilizes the pressure-air atomization metal liquid stream of 0.3MP～1.2MP, makes the powder that conforms with dimension, requirement; The 3rd step, cooling collection powder; In the 4th step, sieve through cooling powder; The 5th step, the product vacuum packaging.
Because the metal lead powder of at present atomization production is exposed in air easily oxidation deterioration, therefore adopt vacuum packaging, but there is following problem in the product of producing under existing production technology situation: 1, various gas leakage situations easily appears in vacuum packaging, causes the oxidation of powder; 2, vacuum packaging is because external and internal pressure is poor, and lead powder end and tin powder are easy to caking; 3, the grain weight of oxidation and caking is newly processed increases a large amount of costs, and the volatilization of powder simultaneously and flying upward causes metal loss, volatilizees and flies upward and also easily cause heavy metal poisoning.
Summary of the invention
The object of the present invention is to provide a kind of production method of metal lead powder, the metal lead powder antioxygenic property that the method makes is good, be fit to carry out the routine packing, avoided simultaneously the problem of vacuum packaging caking; The method technique is simple, be easy to control, security is good.
The objective of the invention is to be achieved through the following technical solutions:
A kind of production method of metal lead powder, comprise the steps such as metal molten, atomizing, it is characterized in that: the temperature of metal molten process molten lead liquid is controlled at 425～440 ℃, add the BTA additive in described atomization process, its addition accounts for 0.001%～0.005% of metallic lead liquid weight after fusing, and the pressure-air throughput that atomization process passes into is controlled at 5～6.5m
3/ min.The method makes the metal lead powder of 0.1～4mm level, and it is applied in the high density rubber slab of anti-nuclear radiation in the nuclear engineering field.
Above-mentioned BTA additive, its molecular formula: C6H5N3, outward appearance is white, little Huang or blush acicular crystal, molecular weight 119.0, boiling point: 204 ℃ (pressure 2KPa), fusing point: 100 ℃, be the commercially available prod.
The inventor adopts in the R﹠D process of 0.1～4mm level metal lead powder of atomization production application in the nuclear engineering field, selected multiple additives to prevent the oxidation of metal dust product, do not reach industrial requirement but the metal dust product that makes adopts the product that oxidation occurs after conventional packing to reach at least more than 45%, can't promote, the product antioxidant effect is undesirable; Safety issue, the bad control of whole production process appear.The inventor has done a large amount of experimental studies, finally selected the BTA additive and added in atomization process, the addition of BTA also is worthy of careful study very much simultaneously, be controlled at that amount ranges of the present invention makes the security of production process good, simultaneously the oxidation resistance of final metal dust product is good, ultimogenitary metal dust product adopts conventional packing, and its oxidation deterioration rate is only 3～3.5% left and right.
In order further to improve the oxidation resistance of the metal lead powder product that makes, the temperature that adds of above-mentioned BTA additive is that 210-283 ℃, pressure are 0.8～0.95 standard atmospheric pressure; Can make the metal dust product of production adopt conventional packing, its oxidation deterioration rate is only 2.3～2.8% left and right.
More preferably, in order further to improve the oxidation resistance of security performance and metal lead powder product, the temperature that adds of above-mentioned BTA additive is 250～275 ℃, the pressure that passes into pressure-air in the metal liquid stream atomization process is 0.3～0.5Mpa, and the temperature of metal molten process molten lead liquid is controlled at 430～436 ℃; The metal dust product of producing adopts conventional packing, and its oxidation deterioration rate is only 1.2～2.0% left and right.
Specifically, a kind of production method of metal lead powder, comprise the steps such as metal molten, atomizing, it is characterized in that: add the BTA additive in described atomization process, its addition accounts for 0.002%～0.004% of molten metal weight after fusing, the temperature that adds of described BTA additive is that 250～275 ℃, pressure are 0.8～0.95 standard atmospheric pressure, and the pressure that passes into pressure-air in the metal liquid stream atomization process is that 0.3～0.5Mpa, high pressure gas flow are 5～6.5m
3/ min, the temperature of metal molten process molten lead liquid is controlled at 430～436 ℃; In whole production process security of system good, be easy to control, the metal dust product of producing simultaneously only need adopt conventional packing, its oxidation deterioration rate is only 0.5～1.0% left and right.
The present invention has following beneficial effect:
The present invention selects a kind of additive by producing at atomization in the metal lead powder process, utilize the character of additive self, the interaction of additive and metallic lead and the favorable environment of atomizing make the additive gasification at the protective layer of the anti-oxidation of lead powder surface formation one deck and caking; By production practices, 0.1～4mm level metal lead powder of using the inventive method production is mainly used in the high density rubber slab of the anti-nuclear radiation of nuclear engineering field making, adopt conventional packing, reduced more than 98% because of oxidation and the return of goods that occur that lump, metal lead powder product oxidation deterioration rate can effectively be controlled at 0.5%～3.5%, the conventional packing of employing production cost is reduced effectively, the production system security is good, return of goods rate is reduced greatly, remarkable in economical benefits, while employee's working environment improves, physical and mental health is guaranteed.
The specific embodiment
Below by embodiment, the present invention is carried out concrete description; be necessary to be pointed out that at this following examples only are used for the present invention is further illustrated; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment to the present invention according to the invention described above content.
Embodiment 1
A kind of production method of metal lead powder, carry out in the steps below:
A. dissolving obtains metallic lead liquid stream in the metal molten stove, and the temperature of molten lead liquid is controlled at 430～436 ℃;
B. the metallic lead liquid flow diameter that adds in atomization process is at 5～5.5mm; Be that 0.3～0.5Mpa, throughput are 6～6.5m with pressure
3The pressure-air of/min passes in atomization plant the atomizing of metallic lead liquid stream, pass into simultaneously the BTA additive, described BTA additive addition accounts for 0.002%～0.004% of the metal liquid stream weight that enters atomization plant, and the temperature that adds of described BTA additive is that 264～275 ℃, pressure are 0.8～0.95 standard atmospheric pressure;
C. be cooled to normal temperature collection powder;
D. the screening, through routine be packaged into the bag standby or for sale.
In the said method production process, security is good; 0.1～4mm level metal lead powder oxidation deterioration the rate that makes is only 0.5～1.0%, exists hardly post sales and returns goods, conventional packing, remarkable in economical benefits.
Embodiment 2～6: reach according to the following steps the explained hereafter metal dust, all the other are with embodiment 1.
0.1～4mm level metal lead powder oxidation deterioration rate that said method makes is only 1.2～3%, conventional packing, remarkable in economical benefits; In preparation process, security is good.
Claims (4)
1. the production method of a metal lead powder, comprise the steps such as metal molten, atomizing, it is characterized in that: the temperature of metal molten process molten lead liquid is controlled at about 425～440 ℃, add the BTA additive in described atomization process, its addition accounts for 0.001%～0.005% of metallic lead liquid weight after fusing, and the pressure-air throughput that atomization process passes into is controlled at approximately 5～6.5m
3/ min.
2. production method as claimed in claim 1 is characterized in that: the temperature that adds of described BTA additive is that 210-283 ℃, pressure are 0.8～0.95 standard atmospheric pressure.
3. production method as claimed in claim 2, it is characterized in that: the temperature that adds of described BTA additive is 250～275 ℃, the pressure that passes into pressure-air in the metal liquid stream atomization process is 0.3～0.5Mpa, and the temperature of metal molten process molten lead liquid is controlled at 430～436 ℃.
4. production method as claimed in claim 1, it is characterized in that: add the BTA additive in described atomization process, its addition accounts for 0.002%～0.004% of molten metal weight after fusing, the temperature that adds of described BTA additive is that 250～275 ℃, pressure are 0.8～0.95 standard atmospheric pressure, the pressure that passes into pressure-air in the metal liquid stream atomization process is 0.3～0.5Mpa, and the temperature of metal molten process molten lead liquid is controlled at 430～436 ℃.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610308034.6A CN105728737B (en) | 2011-11-28 | 2011-11-28 | A kind of preparation method of anti-oxidation lead powder |
| CN201110385504.6A CN103128297B (en) | 2011-11-28 | 2011-11-28 | A kind of production method of metal lead powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110385504.6A CN103128297B (en) | 2011-11-28 | 2011-11-28 | A kind of production method of metal lead powder |
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| CN201610308034.6A Division CN105728737B (en) | 2011-11-28 | 2011-11-28 | A kind of preparation method of anti-oxidation lead powder |
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| CN103128297A true CN103128297A (en) | 2013-06-05 |
| CN103128297B CN103128297B (en) | 2016-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103400624A (en) * | 2013-07-13 | 2013-11-20 | 大丰市大奇金属磨料有限公司 | Metal lead ball for shielding radiation and manufacturing method of metal lead ball |
| CN104131317A (en) * | 2014-08-01 | 2014-11-05 | 昆明理工大学 | Method for preparation of fine lead powder by electrodeposition |
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| JPH11250744A (en) * | 1998-03-02 | 1999-09-17 | Fujikura Ltd | Rustproof processing method for conductor for outdoor distribution line |
| CN1356189A (en) * | 2000-12-02 | 2002-07-03 | 王有林 | Antioxidizing agent for metal powder |
| CN101139716A (en) * | 2007-10-25 | 2008-03-12 | 金川集团有限公司 | Method for preventing oxidization of copper powder |
| CN101362206A (en) * | 2008-10-09 | 2009-02-11 | 陈新国 | Preparation method of continuous high quality soldering powder |
| CN101736338A (en) * | 2009-11-25 | 2010-06-16 | 中南大学 | Composite antioxidant applied to copper powder |
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2011
- 2011-11-28 CN CN201110385504.6A patent/CN103128297B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11250744A (en) * | 1998-03-02 | 1999-09-17 | Fujikura Ltd | Rustproof processing method for conductor for outdoor distribution line |
| CN1356189A (en) * | 2000-12-02 | 2002-07-03 | 王有林 | Antioxidizing agent for metal powder |
| CN101139716A (en) * | 2007-10-25 | 2008-03-12 | 金川集团有限公司 | Method for preventing oxidization of copper powder |
| CN101362206A (en) * | 2008-10-09 | 2009-02-11 | 陈新国 | Preparation method of continuous high quality soldering powder |
| CN101736338A (en) * | 2009-11-25 | 2010-06-16 | 中南大学 | Composite antioxidant applied to copper powder |
Non-Patent Citations (1)
| Title |
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| CUBRA.C，李朝军: "用限制型低压喷嘴制备细金属粉末", 《国外锡工业》, no. 2, 31 December 1997 (1997-12-31), pages 45 - 50 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103400624A (en) * | 2013-07-13 | 2013-11-20 | 大丰市大奇金属磨料有限公司 | Metal lead ball for shielding radiation and manufacturing method of metal lead ball |
| CN104131317A (en) * | 2014-08-01 | 2014-11-05 | 昆明理工大学 | Method for preparation of fine lead powder by electrodeposition |
| CN104131317B (en) * | 2014-08-01 | 2016-08-24 | 昆明理工大学 | The method of thin lead powder is prepared in a kind of electro-deposition |
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| CN103128297B (en) | 2016-05-18 |
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Inventor after: Chen Lin Inventor after: Ma Caiming Inventor after: Mo Zhengbin Inventor before: Zeng Mingjun Inventor before: Liu Qiang Inventor before: Mo Zhengbin |
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Effective date of registration: 20160413 Address after: 401431 Sanjiang street, Qijiang District, Chongqing Applicant after: Chongqing You Yanchongye novel material company limited Address before: 401431 Sanjiang street, Qijiang, Chongqing Applicant before: Chongqing Smeltted Co., Ltd. |
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