CN105728736A - Method for preparing anti-oxidation tin powder - Google Patents
Method for preparing anti-oxidation tin powder Download PDFInfo
- Publication number
- CN105728736A CN105728736A CN201610272558.4A CN201610272558A CN105728736A CN 105728736 A CN105728736 A CN 105728736A CN 201610272558 A CN201610272558 A CN 201610272558A CN 105728736 A CN105728736 A CN 105728736A
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- Prior art keywords
- metal
- additives
- atomizing
- tin powder
- oxidation
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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
-
- 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 a method for preparing anti-oxidation tin powder. The method includes steps of melting metal; atomizing the metal and the like. The tin liquid fusing temperatures are 295-310 DEG C under the control in metal melting procedures, benzotriazole additives are added into the metal in atomizing procedures, the addition of the benzotriazole additives accounts for 0.005%-0.008% of the weight of molten metal tin liquid, and the air flow of filled high-pressure air is approximately 7-8.2 m<3>/min under the control in the atomizing procedures. The method has the advantages that a type of additives is selected in procedures for producing the metal tin powder by the aid of atomizing processes, and the additives can be gasified to form oxidation and caking preventive protection layers on the surface of the metal tin powder by the aid of properties of the additives, mutual effects of the additives and the metal and favorable atomizing environments; the oxidation deterioration rates of conventionally packaged metal tin powder products produced by the aid of the method can be 0.8%-3.5% under the effective control, the conventional packaging and production costs can be effectively reduced, production systems are good in safety, the return rate can be lowered to a great extent, and method has an obvious economic benefit.
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 preparation of metal dust, the preparation method being specifically related to a kind of anti-oxidation glass putty.
Background technology
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
The preparation method that it is an object of the invention to provide a kind of anti-oxidation metallic tin powder；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 preparation method of anti-oxidation 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 preparation method of anti-oxidation 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 preparation method of a kind of anti-oxidation 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 preparation method of an anti-oxidation 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 300～310 DEG C；
B. the metallic tin liquid stream diameter added in atomization process is at about 2.5～2.8mm；It is that 0.6～0.7Mpa, throughput are approximately 7.5～8.2m by pressure3The 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272558.4A CN105728736B (en) | 2011-11-28 | 2011-11-28 | A kind of preparation method of anti-oxidation glass putty |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272558.4A CN105728736B (en) | 2011-11-28 | 2011-11-28 | A kind of preparation method of anti-oxidation 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105728736A true CN105728736A (en) | 2016-07-06 |
| CN105728736B CN105728736B (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610272558.4A Active CN105728736B (en) | 2011-11-28 | 2011-11-28 | A kind of preparation method of anti-oxidation glass putty |
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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 CN201610272558.4A patent/CN105728736B/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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|---|---|
| CN105728736B (en) | 2018-04-06 |
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