CN105689729A - Atomization production method for high-quality tin powder - Google Patents
Atomization production method for high-quality tin powder Download PDFInfo
- Publication number
- CN105689729A CN105689729A CN201610272165.3A CN201610272165A CN105689729A CN 105689729 A CN105689729 A CN 105689729A CN 201610272165 A CN201610272165 A CN 201610272165A CN 105689729 A CN105689729 A CN 105689729A
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- Prior art keywords
- atomization
- metal
- additive
- production method
- tin powder
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0848—Melting process before atomisation
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses an atomization production method for high-quality tin powder. The atomization production method comprises the following steps: melting metal, atomizing metal, and the like, wherein the temperature of molten tin is controlled to be 295-310 DEG C in the metal melting process; a benzotriazole additive is added in the atomization process; the addition amount of the benzotriazole additive accounts for 0.005-0.008% of the weight of the molten tin; the flow rate of high-pressure air introduced in the atomization process is controlled to be about 7-8.2m<3>/minute. According to the atomization production method, an additive is selected in the process that metal tin powder is produced by using an atomization method; due to properties of the additive self, the interaction of the additive and metal and a beneficial atomization environment, the additive can be gasified on the surface of the metal tin powder to form a protecting layer for preventing oxidation or agglomeration; a tin powder product produced by using the atomization production method disclosed by the invention is packaged normally, and the oxidative deterioration rate of the metal tin powder product can be effectively controlled to be 0.8-3.5%; due to the normal package, the production cost can be effectively reduced, the production system is good in security, the rejection rate is greatly reduced, and remarkable economic benefits can be achieved.
Description
The present patent application is the divisional application for application number 201110385490.8, the patent of invention in November 28 2011 applying date。
Technical field
The present invention relates to the production method of a kind of metal dust, be specifically related to the atomization production method of a kind of glass putty。
Background technology
The production of metal current glass putty adopts gas atomization, and its basic production technology is: the first step, the fusing of metal, and fusion temperature is higher 50 DEG C than melting point metal～and 100 DEG C；Second step, in atomization plant, utilizes the pressure-air atomization metal liquid stream of 0.3MP～1.2MP, prepares the powder conforming with dimension, requirement；3rd step, cooling collection powder；4th step, cooled powder sieves；5th step, product vacuum packaging。The metallic tin powder produced due to current atomization exposes oxidizable rotten in atmosphere, therefore vacuum packaging is adopted, but the product produced under existing production technology situation, there is problems in that 1, various gas leakage situations easily occurs in vacuum packaging, causes the oxidation of powder；2, vacuum packaging due to external and internal pressure poor, tin powder and tin powder be easy to caking；3, the grain weight of oxidation and caking newly processes the substantial amounts of cost of increase, the simultaneously volatilization of powder and flying upward, and causes metal loss, and volatilizing and flying upward is also easy to cause heavy metal poisoning。
Summary of the invention
It is an object of the invention to provide the atomization production method of a kind of high-quality glass putty, the metallic tin powder antioxygenic property that the method prepares is good, be appropriate to conventional packaging, the problem simultaneously avoiding vacuum packaging caking；The method technique is simple, easily controllable, safety is good。
It is an object of the invention to be achieved through the following technical solutions:
A kind of atomization production method of high-quality glass putty, including the step such as metal molten, atomization, it is characterized in that: the temperature of metal molten process soldering tin controls at 295～310 DEG C, described atomization process adds BTA additive, its addition accounts for 0.005%～0.008% of the metal tin liquor weight after fusing, and the pressure-air throughput that atomization process passes into controls at 7～8.2m3/ min。-180 order level metallic tin powder that the method prepares, are applied to friction material field。
Above-mentioned BTA additive, its molecular formula: C6H5N3, outward appearance is Huang white, micro-or blush acicular crystal, molecular weight 119.0, boiling point: 204 DEG C (pressure 2KPa), fusing point: 100 DEG C, for commercially available prod。
| Index name | Index |
| Purity | >=99.8% |
| Colourity | ≤ No. 40 |
| Moisture | ≤ 0.04% |
| Fusing point | ≥100℃ |
| Ash | ≤ 0.03% |
| PH value | 5-6 |
Inventor adopts atomization production application in the R&D process of-180 order level metallic tin powder of friction material field, have selected multiple additives and prevent the oxidation of metal dust product, but the metal dust product prepared occurs the product of oxidation at least up to more than 45% after adopting routine packaging, it is impossible to promote, product antioxidant effect is undesirable does not reach industrial requirement；Safety issue, the bad control of whole production process occur。Inventor has done substantial amounts of experimentation, have finally chosen BTA additive and add in atomization process, the addition of BTA is also worthy of careful study very much simultaneously, control to make the safety oxidation resistance good, final metal dust product simultaneously of production process good in the amount ranges of the present invention, ultimogenitary metal dust product adopts routine packaging, and its oxidation deterioration rate is only about 2.7～3.5%。
In order to improve the oxidation resistance of prepared metallic tin powder product further, the addition temperature of above-mentioned BTA additive is 210～283 DEG C, pressure is 0.8～0.95 normal atmosphere；The metal dust product produced can be made to adopt routine packaging, and its oxidation deterioration rate is only about 2.0～2.5%。
More preferably, in order to improve security performance and the oxidation resistance of metallic tin powder product further, the addition temperature of above-mentioned BTA additive is 250～275 DEG C, the pressure passing into pressure-air in metal liquid stream atomization process is 0.5～0.7Mpa, and the temperature of metal molten process soldering tin controls at 300～310 DEG C；The metal dust product produced adopts routine packaging, and its oxidation deterioration rate is only about 1.5～2%。
Specifically, a kind of atomization production method of high-quality glass putty, including the step such as metal molten, atomization, it is characterized in that: in described atomization process, add BTA additive, its addition accounts for 0.006%～0.007% of the molten metal weight after fusing, the addition temperature of described BTA additive is 250～275 DEG C, pressure is 0.8～0.95 normal atmosphere, and passing into the pressure of pressure-air in metal liquid stream atomization process be 0.6～0.7Mpa, high pressure gas flow is 7.5～8.2m3/ min, the temperature of metal molten process soldering tin controls at 300～310 DEG C；In whole production process, security of system is good, easily controllable, and the metal dust product simultaneously produced only need to adopt conventional packaging, and its oxidation deterioration rate is only about 0.8～1.5%。
The present invention has following beneficial effect:
The present invention selects a kind of additive by producing at atomization in metallic tin powder process; utilize the character of additive self; the interaction of additive and metallic tin and the favorable environment of atomization so that additive gasification forms the protective layer of one layer of anti-oxidation and caking on glass putty surface；Pass through production practices,-180 order level metallic tin powder that application the inventive method produces are mainly used in friction material field, as: motorcycle/automobile brake sheet, the antifriction position of mechanical rotation etc., adopt routine packaging, because the return of goods that oxidation and caking occur decrease more than 98%, metallic tin powder product oxidation deterioration rate can be effectively controlled 0.8%～3.5%, routine packaging production cost is adopted to be effectively reduced, production system safety is good, return of goods rate is considerably reduced, remarkable in economical benefits, the working environment of employee improves simultaneously, physical and mental health is guaranteed。
Detailed description of the invention
By the examples below the present invention is specifically described; be necessary it is pointed out here that be that following example are served only for the present invention is further described; it is not intended that limiting the scope of the invention, the present invention can be made some nonessential improvement and adjustment according to the invention described above content by the person skilled in the art in this field。
Embodiment 1
The atomization production method of a kind of high-quality glass putty, carries out in the steps below:
A. dissolving in metal molten stove and obtain metallic tin liquid stream, the temperature of soldering tin controls at 300～310 DEG C；
B. the metallic tin liquid stream diameter added in atomization process is at 2.5～2.8mm；Be 0.6～0.7Mpa, throughput by pressure it is 7.5～8.2m3The pressure-air of/min passes in atomization plant and is atomized by metallic tin liquid stream, pass into BTA additive simultaneously, described BTA additive addition accounts for the 0.006%～0.007% of the metal liquid stream weight entering atomization plant, and the addition temperature of described BTA additive is 264～275 DEG C, pressure is 0.8～0.95 normal atmosphere；
C. room temperature collection powder it is cooled to；
D. screening, to be packaged into bag through routine standby or for sale。
In said method production process, safety is good；The metallic tin powder oxidation deterioration rate prepared is only 0.8～1.5%, there's almost no post sales the return of goods, conventional packaging, remarkable in economical benefits。
Embodiment 2～6: according to the following steps and explained hereafter metal dust, all the other are with embodiment 1。
The metallic tin powder oxidation deterioration rate that said method prepares is only 1.0～3.5%, conventional packaging, remarkable in economical benefits；In preparation process, safety is good。
Claims (1)
1. the atomization production method of a high-quality glass putty, it is characterised in that carry out in the steps below:
A. dissolving in metal molten stove and obtain metallic tin liquid stream, the temperature of soldering tin controls at 310 DEG C；
B. the metallic tin liquid stream diameter added in atomization process is at 2.7mm；Be 0.65Mpa, throughput by pressure it is 7.2m3The pressure-air of/min passes in atomization plant and is atomized by metallic tin liquid stream, pass into BTA additive simultaneously, described BTA additive addition accounts for about the 0.0075% of the metal liquid stream weight entering atomization plant, and the addition temperature of described BTA additive is about 285 DEG C, pressure is 0.8～0.95 normal atmosphere；
C. room temperature collection powder it is cooled to；
D. screening, to be packaged into bag through routine standby or for sale。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272165.3A CN105689729B (en) | 2011-11-28 | 2011-11-28 | A kind of atomization production method of high-quality glass putty |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272165.3A CN105689729B (en) | 2011-11-28 | 2011-11-28 | A kind of atomization production method of high-quality glass putty |
| CN201110385490.8A CN103128296B (en) | 2011-11-28 | 2011-11-28 | A kind of production method of metallic tin powder |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110385490.8A Division CN103128296B (en) | 2011-11-28 | 2011-11-28 | A kind of production method of metallic tin powder |
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| Publication Number | Publication Date |
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| CN105689729A true CN105689729A (en) | 2016-06-22 |
| CN105689729B CN105689729B (en) | 2018-03-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07113106A (en) * | 1993-10-12 | 1995-05-02 | Daido Kagaku Kogyo Kk | Method for preventing oxidation of nonferrous metallic powder in production of nonferrous metallic 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 |
| CN101695755A (en) * | 2009-10-26 | 2010-04-21 | 江西悦安超细金属有限公司 | Method for preparing alloy powder for metal injection moulding through atomization |
| CN101972854A (en) * | 2010-11-09 | 2011-02-16 | 铜陵铜基粉体科技有限公司 | Method for preparing copper-based powder with low oxygen content and low apparent density through atomization |
-
2011
- 2011-11-28 CN CN201610272165.3A patent/CN105689729B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07113106A (en) * | 1993-10-12 | 1995-05-02 | Daido Kagaku Kogyo Kk | Method for preventing oxidation of nonferrous metallic powder in production of nonferrous metallic 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 |
| CN101695755A (en) * | 2009-10-26 | 2010-04-21 | 江西悦安超细金属有限公司 | Method for preparing alloy powder for metal injection moulding through atomization |
| CN101972854A (en) * | 2010-11-09 | 2011-02-16 | 铜陵铜基粉体科技有限公司 | Method for preparing copper-based powder with low oxygen content and low apparent density through atomization |
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| CN105689729B (en) | 2018-03-16 |
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