CN105728737A - Preparation method for anti-oxidation lead powder - Google Patents
Preparation method for anti-oxidation lead powder Download PDFInfo
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- CN105728737A CN105728737A CN201610308034.6A CN201610308034A CN105728737A CN 105728737 A CN105728737 A CN 105728737A CN 201610308034 A CN201610308034 A CN 201610308034A CN 105728737 A CN105728737 A CN 105728737A
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- Prior art keywords
- additive
- metal
- lead powder
- atomizing
- metallic lead
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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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- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
A preparation method for anti-oxidation lead powder comprises a metal melting step, an atomizing step and the like; temperature of molten lead is controlled to be about 425 to 440 DEG C in a metal melting process; a benzotriazole additive is added in an atomizing process; addition amount of the benzotriazole additive accounts for 0.001 percent to 0.005 percent of the weight of the molten metallic lead; air flow amount of high-pressure air introduced in the atomizing process is controlled to be about 5 to 6.5 m<3>/min. According to the preparation method disclosed by the invention, by selecting the additive in a process of producing the metallic lead powder by an atomizing method and utilizing properties of the additive, interaction between the additive and metal and an enabling environment of atomizing, the additive is gasified to form a protection layer for preventing oxidation and agglomeration on the surface of the metallic lead powder; the oxidative deterioration rate of a metallic lead powder product produced by applying the method disclosed by the invention can be effectively controlled to be 0.5 percent to 3.5 percent by adopting conventional packaging; by adopting the conventional packaging, production cost is effectively reduced, safety of a production system is high, the return rate is greatly reduced, and economical benefit is remarkable.
Description
The present patent application is the divisional application for November 28 2011 applying date, the patent of invention of application number 201110385504.6.
Technical field
The preparation method that the present invention relates to Hydrocerussitum (Ceruse), particularly relates to a kind of method that Hydrocerussitum (Ceruse) is prepared in atomization.
Background technology
The metal lead powder that current atomization produces 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, Hydrocerussitum (Ceruse) end and tin powder is 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 Hydrocerussitum (Ceruse), the metal lead powder antioxygenic property that the method prepares is good, be appropriate to conventional packaging, the problem simultaneously avoiding vacuum packaging caking.
It is an object of the invention to be achieved through the following technical solutions:
A kind of preparation method of anti-oxidation Hydrocerussitum (Ceruse), including the step such as metal molten, atomization, it is characterized in that: the temperature of metal molten process molten lead liquid controls at 425～440 DEG C, described atomization process adds BTA additive, its addition accounts for 0.001%～0.005% of the metallic lead liquid weight after fusing, and the pressure-air throughput that atomization process passes into controls at 5～6.5m3/min.The method prepares the metal lead powder of 0.1～4mm level, and it is applied in the high density rubber slab of anti-nuclear radiation in nuclear engineering 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.
Inventor adopts in the R&D process of the atomization production application 0.1～4mm level metal lead powder in nuclear engineering 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 3～3.5%.
In order to improve the oxidation resistance of prepared metal lead 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 2.3～2.8%.
More preferably, in order to improve security performance and the oxidation resistance of metal lead 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 0.3～0.5Mpa, and the temperature of metal molten process molten lead liquid controls at 430～436 DEG C；The metal dust product produced adopts routine packaging, and its oxidation deterioration rate is only about 1.2～2.0%.
Specifically, a kind of preparation method of anti-oxidation Hydrocerussitum (Ceruse), including the step such as metal molten, atomization, it is characterized in that: in described atomization process, add BTA additive, its addition accounts for 0.002%～0.004% 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 0.3～0.5Mpa, high pressure gas flow is 5～6.5m3/ min, the temperature of metal molten process molten lead liquid controls at 430～436 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 0.5～1.0%.
The present invention has following beneficial effect:
The present invention selects a kind of additive by producing at atomization in metal lead powder process; utilize the character of additive self; the interaction of additive and metallic lead and the favorable environment of atomization so that additive gasification forms the protective layer of one layer of anti-oxidation and caking on Hydrocerussitum (Ceruse) surface；Pass through production practices, 0.1～4mm level metal lead powder that application the inventive method produces is mainly used in nuclear engineering field and makes the high density rubber slab of anti-nuclear radiation, adopt routine packaging, because the return of goods that oxidation and caking occur decrease more than 98%, metal lead powder product oxidation deterioration rate can be effectively controlled 0.5%～3.5%, employing routine packaging production cost is 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 Hydrocerussitum (Ceruse), carries out in the steps below:
A. dissolving in metal molten stove and obtain metallic lead liquid stream, the temperature of molten lead liquid controls at 430～436 DEG C；
B. the metallic lead liquid stream diameter added in atomization process is at 5～5.5mm；Be 0.3～0.5Mpa, throughput by pressure it is 6～6.5m3The pressure-air of/min passes in atomization plant and is atomized by metallic lead liquid stream, pass into BTA additive simultaneously, described BTA additive addition accounts for the 0.002%～0.004% 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；0.1～4mm level metal lead powder oxidation deterioration the rate prepared is only 0.5～1.0%, 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.
0.1～4mm level metal lead powder oxidation deterioration rate that said method prepares is only 1.2～3%, conventional packaging, remarkable in economical benefits；In preparation process, safety is good.
Claims (1)
1. a preparation method for anti-oxidation Hydrocerussitum (Ceruse), carries out in the steps below:
(1), in metal molten stove dissolve obtain metallic lead liquid stream, the temperature of molten lead liquid controls at 430～436 DEG C；
(2), the metallic lead liquid stream diameter added in atomization process is at about 5～5.5mm；Be 0.3～0.5Mpa, throughput by pressure it is 6～6.5m3The pressure-air of/min passes in atomization plant and is atomized by metallic lead liquid stream, pass into BTA additive simultaneously, described BTA additive addition account for enter atomization plant metal liquid stream weight 0.002%～0.004%, the addition temperature of described BTA additive be approximately 264～275 DEG C, pressure be 0.8～0.95 normal atmosphere；
(3) room temperature collection powder, it is cooled to；
(4), screening, to be packaged into bag through routine standby or for sale.
Priority Applications (1)
| 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 |
Applications Claiming Priority (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 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110385504.6A Division CN103128297B (en) | 2011-11-28 | 2011-11-28 | A kind of production method of metal lead powder |
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| CN105728737A true CN105728737A (en) | 2016-07-06 |
| CN105728737B CN105728737B (en) | 2018-06-29 |
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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 CN201610308034.6A patent/CN105728737B/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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| CN105728737B (en) | 2018-06-29 |
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