CN113263175A - High-performance manganese additive - Google Patents
High-performance manganese additive Download PDFInfo
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- CN113263175A CN113263175A CN202110595798.9A CN202110595798A CN113263175A CN 113263175 A CN113263175 A CN 113263175A CN 202110595798 A CN202110595798 A CN 202110595798A CN 113263175 A CN113263175 A CN 113263175A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
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- 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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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C22/00—Alloys based on manganese
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- 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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Abstract
The invention provides a high-performance manganese additive, and compared with the products in the prior art, the product performance of the product is integrally improved, which is mainly reflected in that the particle size distribution of manganese in the product is uniform, the impurity content is low, and the consumption of aluminum in a manganese agent is low. When in use, the manganese-containing alloy is added into aluminum liquid, the dispersion is fast, the melting speed is fast, the manganese-containing alloy can be completely melted in 15 minutes at the temperature of 720 ℃, and the actual yield of the manganese element is over 99.5 percent. The environmental pollution is greatly reduced when the device is used, and the comprehensive production cost is reduced.
Description
The application is a divisional application, the application number of the original application is 2019109461773, the application date is 2019.10.05, the name of the invention is: high-performance manganese additive and production method thereof
Technical Field
The invention relates to the field of additives for aluminum alloy production, in particular to a production technology of a manganese additive (or a manganese-aluminum alloy additive or a manganese additive).
Background
Manganese is a main aluminum alloy additive element, and the preparation and use processes of the commonly used manganese additive are as follows: firstly, preparing electrolytic manganese metal sheets into powder (accounting for 60-85 mass percent), then adding fluxing agent (accounting for 15-25 mass percent) and binder (accounting for 1-2 mass percent), uniformly stirring and pressing for molding, and finally quantitatively adding the powder into molten aluminum at 760 ℃ in a smelting furnace.
The main indicators for measuring the performance of the manganese additive are: the melting temperature, the melting speed and the manganese element yield are key factors for determining the performance of the manganese additive, and the quality of the manganese metal powder is more important along with the vigorous popularization and application of the environment-friendly fluxing agent-free manganese additive, so that the particle size distribution of the manganese metal powder is required to be narrower, and the content of impurities such as manganese oxides is required to be lower.
Therefore, the manganese powder is the key point of the manganese additive, and the existing method for preparing the metal manganese powder mainly comprises the following steps: the high-pressure roller milling or ball milling has the following defects:
(1) the particle size distribution is wide, the amount of over-fine particles is large, the particle size range of the metal manganese powder is generally between-300 um to +30um, and when the particle size of the metal manganese powder for the manganese additive is too large and the metal manganese powder is added into the aluminum liquid, the metal manganese powder is settled at the bottom of a smelting furnace before being melted; when the manganese is too fine, the boiling effect during the adding process is that fine powder carried by gas floats to scum or is pumped out along with a dust collection draught fan, the fine powder cannot be melted in aluminum liquid and is lost, and the yield of the manganese element is reduced. Practice proves that the granularity is best between-250 um and +150um, the melting is uniform and fast, the melting temperature is low, however, no matter the high-pressure roller grinding or the ball milling is adopted, because the electrolytic manganese metal sheet has high purity and hard and brittle physical properties, the superfine powder (accounting for more than 20 percent of the total powder mass) with the granularity of less than 45um can be generated in a large amount, and the production cost is high because the electrolytic manganese metal sheet is not utilized.
(2) The manganese oxide product in the metal manganese powder is more, which causes the yield of the manganese additive to be reduced. Mainly because manganese is active in chemical property, although the electrolytic manganese sheet is passivated, the electrolytic manganese sheet can be oxidized to be black and gray after being stored for a period of time, and the oxygen content can reach 0.5 percent after being crushed into manganese powder. If the later process is added: adding fluxing agent and binder, stirring and mixing, forging, packaging and storing, then newly generating manganese oxide, wherein the corresponding oxygen content can be increased to 1.0-1.5%, manganese oxide becomes scum when the aluminum alloy is smelted, the yield of manganese element is reduced, the yield of manganese element of the manganese additive on the market is over 99%, and the actual yield of manganese element is mostly only 97%. As also shown in patent application 2016102640425, a water-adding mixing process is also used, which undoubtedly accelerates the oxidation of the manganese metal.
(3) Further purification and impurity removal are not possible. The aluminum alloy is used for packaging food, medicines and the like, the control on harmful elements in the aluminum alloy is strict, the manganese additive is required to be a low-selenium (the selenium content of manganese powder is 0.02 percent) or even a selenium-free product, the selenium content of a common electrolytic metal manganese sheet is up to 0.06 percent and cannot be used, the low-selenium electrolytic manganese sheet is 1.5 times of the price of the common electrolytic manganese sheet, the cost for producing the manganese additive is high, and the product lacks competitiveness.
(4) The environmental pollution is great. High-pressure roller milling or ball milling is noisy, and screening equipment is added, so that raised dust is large, although a dust collecting device is arranged, the system is not easy to seal, the leaked dust amount is still large, the damage to operators in the existing place is large, and the pollution to the surrounding environment is also large.
The existing manganese additive without fluxing agent is environment-friendly when in use, but has the defects of large consumption of metal aluminum powder (the metal aluminum accounts for 15-20% of the mass fraction of the manganese additive), high production cost, lack of competitiveness of products in the market, small consumption of the metal aluminum powder and difficult forging and forming.
Disclosure of Invention
The invention aims at the defects of the technology, and provides a high-performance manganese additive and a production method thereof, which have the characteristics of low production cost, short and centralized production flow and good product performance.
The specific technical scheme of the invention is as follows: a high-performance manganese additive is characterized in that the mass ratio of each component in the product is as follows: 90-95% of manganese metal, 4-10% of metal aluminum, 0.8% of binder and 0.2% of release agent; the metal manganese is prepared into powder by gas atomization after the electrolytic metal manganese sheet is melted, the manganese content of the metal manganese powder is more than or equal to 99.7 percent, the oxygen content is less than or equal to 0.1 percent, the selenium content is less than or equal to 0.01 percent, and the iron content and the silicon content are less than or equal to 0.1 percent; the aluminum content of the metal aluminum is more than or equal to 99.8 percent; the metal aluminum is bonded or wrapped outside the metal manganese powder particles,
the particle size distribution is as follows: -250um to +150um account for more than 80% of the total mass, +250um accounts for less than 5% of the total mass, +300um is absent, -150 um accounts for less than 15% of the total mass, -75 um accounts for less than 3% of the total mass, -45 um is absent; the median diameter d of the metal aluminum particle size50=140um，
Further, the binder is ethylene glycol diacetate or propylene glycol stearate or a mixture of the two; the release agent is zinc stearate;
further, carrying out high-performance manganese additive finished product weight unit of 200-800 g, carrying out high-performance manganese additive finished product density 3.8-4.5 g/cm high-speed harvest, and carrying out finished product shape cake-shaped or spherical or pillow-shaped;
the production method of the high-performance manganese additive is characterized by comprising the following steps:
firstly, melting electrolytic manganese metal sheets: putting the electrolytic manganese metal sheet into an induction smelting furnace, controlling the smelting temperature to 1350-1500 ℃, and refining the molten manganese liquid to remove upper-layer scum;
secondly, atomizing to prepare powder: introducing pure carbon dioxide gas into an atomizer, sucking molten manganese liquid into the atomizer, and atomizing the manganese liquid into small droplets in an atomizing chamber; introducing carbon dioxide gas into a Venturi powder sprayer, sucking the excessively fine manganese metal powder into the Venturi powder sprayer, spraying the excessively fine manganese metal powder into an atomizing chamber, colliding and adsorbing with atomized manganese liquid drops to condense the manganese metal powder into powder, recycling the excessively fine manganese metal powder, accelerating the condensation of manganese liquid, further adjusting the temperature of the atomizing chamber by using a cooling coil and a water cooling jacket, and controlling the temperature in the atomizing chamber to be 600-750 ℃; controlling the pressure of carbon dioxide gas of the atomizer to be 0.8 MPa-4 MPa,
thirdly, coating and cooling: depositing hot metal manganese powder to the bottom of the atomizing chamber, introducing carbon dioxide gas into a Venturi powder suction device to suck aluminum powder, then introducing the metal manganese powder, blowing the metal manganese powder out of the atomizing chamber together, entering a cooler, melting the dispersed aluminum powder in the hot manganese powder, bonding the melted aluminum powder and wrapping the surface of manganese powder particles, cooling the manganese powder particles to normal temperature through the cooler, discharging the manganese powder particles to a mixing stirrer from the lower part of the cooler, introducing powder-containing gas at an outlet at the upper part of the cooler into a first-stage separator, then introducing the powder-containing gas into a second-stage separator, finally introducing the powder discharged from a discharge outlet of the first-stage separator into the mixing stirrer, introducing the superfine powder discharged from a discharge outlet of the second-stage separator and a discharge outlet of the dust separator into the atomizing chamber through a Venturi powder sprayer, cooling and pressurizing tail gas at an outlet of the dust separator, recycling the carbon dioxide gas into the atomizing chamber, wherein the mass ratio of the metal manganese to the carbon dioxide gas entering the atomizing chamber is 8-20: 1; the mass ratio of the metal manganese to the aluminum powder entering the atomizing chamber is 10-12: 1.
fourthly, mixing and stirring: determining manganese content of the aluminum-manganese mixed powder, blending the pure aluminum powder or manganese powder to a fixed value when the manganese content does not reach the required manganese content, adding a binder and a release agent, uniformly mixing,
fifthly, forming and packaging: pressing and molding the powder on a forging press or a roller press, carrying out dry-forging and high-speed dry-forging, wherein the density of the pressed powder reaches 4 g-4.5 g/cm, each finished product has the single weight of 200 g-800 g, packaging the finished products by kraft paper bags or cartons, and accurately measuring the weight of single packaging.
Further, the coatings are bonded to each other or semi-coated.
Further, the carbon dioxide gas is a mixed gas having a carbon dioxide content of 99.9% or more and an oxygen content of 0.01% or less.
Furthermore, the atomization pulverization and coating cooling processes are carried out in a sealed environment, and the oxygen content in the atmosphere is less than 0.05%.
Further, the binder is ethylene glycol diacetate or propylene glycol stearate or a mixture of the two; the release agent is zinc stearate;
the invention has the beneficial effects that:
1. the product greatly reduces the content of harmful impurity elements. The common electrolytic metal sheet manganese is used as a raw material, the temperature is over 1000 ℃ when the raw material is melted and atomized, the boiling point of elemental selenium in the raw material is only 685 ℃, most selenium is evaporated, the selenium content can be reduced from 0.06% to below 0.01%, the requirement of a low-selenium product below 0.02% is met, and the existing production method does not have a removal function.
2. The content of manganese oxide in the product is reduced, and the content of metal manganese is improved, so that the yield of manganese element is improved. When the electrolytic manganese metal sheet is melted, manganese oxide on the manganese metal sheet can be removed in a scum form, new manganese oxide is not easily generated in the subsequent production process, and the manganese melt liquid is atomized into particles, so that glass-like small crystals are formed under the protection of atmosphere and are not easily oxidized, the oxygen content of the prepared product is lower than 0.4 percent, and the oxygen content of the existing product is more than 1 percent.
3. The technical performance of the product is integrally improved, which is mainly reflected in that the granularity distribution of manganese in the product is uniform, the impurity content is low, and the metal aluminum is bonded or wrapped with the metal manganese powder to enhance the product molding during forging and pressing, so that the consumption of aluminum in the manganese agent is low. When in use, the manganese-containing alloy is added into aluminum liquid, the dispersion is fast, the melting speed is fast, the manganese-containing alloy can be completely melted in 15 minutes at the temperature of 720 ℃, and the actual yield of the manganese element is over 99.5 percent.
4. The superfine metal manganese powder is recycled and produced in manganese powder preparation, and the condition that the superfine powder is too much to be utilized is avoided.
5. High production efficiency, greatly reduced environmental pollution and low comprehensive production cost.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to fig. 1, wherein the apparatus for producing ultra-fine activated aluminum powder by nitrogen atomization is used as a manganese metal pulverizing apparatus. On the basis of the original device for preparing the superfine active aluminum powder by a nitrogen atomization method, a gas melting furnace is changed into a medium-frequency induction melting furnace, and an atomizer connected with the upper part of an atomization chamber is made of a high-temperature resistant material; in addition, a Venturi powder sprayer is additionally arranged on the upper part of the atomizing chamber, a Venturi powder sprayer is additionally arranged on the lower part of the atomizing chamber, the heat exchange area of a water-cooling heat exchanger in the atomizing chamber is increased, and in addition, only a secondary cyclone classifier is used for classification, and the number of the Venturi powder sprayers is increased: a mixer, a forging press and a metering and packaging device. After the device is transformed, the specific operation is as follows:
firstly, melting metal manganese sheets: putting the electrolytic manganese metal sheet into a medium-frequency induction smelting furnace, controlling the smelting temperature to 1400 ℃, and refining the molten manganese liquid to remove the upper manganese oxide slag.
Secondly, atomizing to prepare powder: introducing pure carbon dioxide gas into an atomizer, introducing molten manganese liquid into the atomizer, atomizing into small liquid drops in the atomizer, introducing the carbon dioxide gas into a Venturi powder sprayer, sucking the excessively fine manganese metal powder into the Venturi powder sprayer, spraying the excessively fine manganese metal powder into the atomizer, colliding and adsorbing with the atomized manganese liquid drops to condense into powder, recycling the excessively fine manganese metal powder, accelerating manganese liquid condensation, simultaneously adjusting the temperature of the atomizer by using a cooling coil and a water cooling jacket, controlling the temperature of the atomizer to be 700 ℃, and controlling the pressure of the carbon dioxide gas of the atomizer to be 1-2 MPa.
Thirdly, coating and cooling: the hot metal manganese powder is settled to the bottom of the atomizing chamber, carbon dioxide gas is introduced into a Venturi powder sprayer to absorb aluminum powder, then the aluminum powder is introduced into the metal manganese powder, the metal manganese powder is blown out of the atomizing chamber and enters a cooler, the dispersed aluminum powder is melted in the hot manganese powder and then is bonded and wrapped on the surfaces of manganese powder particles, the manganese powder is cooled to normal temperature through the cooler, the manganese powder is discharged from the lower part of the cooler to a mixing stirrer, powder-containing gas at the outlet of the upper part of the cooler enters a first-stage separator and then a second-stage separator, and finally enters a dust remover, the fine powder discharged from the discharge port of the second-stage separator and the discharge port of the dust remover enters the atomizing chamber through the Venturi powder sprayer, the tail gas at the outlet of the dust remover is cooled and pressurized and then is recycled to the atomizing chamber, the powder discharged from the first-stage separator also enters the mixing stirrer, and the mass ratio of the metal manganese to the carbon dioxide entering the atomizing chamber is 14: 1, the mass ratio of metal manganese to aluminum powder entering an atomizing chamber is 10: 1.
fourthly, mixing and stirring: and (3) measuring the manganese content of the aluminum-manganese mixed powder, blending the pure aluminum powder or manganese powder to a fixed value when the manganese content does not reach the required manganese content, adding a binder propylene glycol stearate and a release agent zinc stearate, and uniformly mixing.
Fifthly, forming and packaging: pressing and molding the powder on a forging press or a roller press, wherein the density reaches 4.4g/cm after pressing, the single weight of each finished product is 200 g-300 g, packing is carried out by kraft paper bags or cartons, and the packing weight of each single piece is accurately measured.
The atomization powder preparation and the coating cooling process are controlled to be carried out in a sealed environment, and the oxygen content in the atmosphere is below 0.05 percent.
The quality data of the high-performance manganese additive product produced by the method is compared with the prior product
| Mn | AL | O | Balance of | |
| Content of existing product (%) | 85.1 | 13.2 | 1.1 | 0.6 |
| Content of inventive product (%) | 90.5 | 8.7 | 0.2 | 0.6 |
The foregoing shows and describes the general principles and features of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A high-performance manganese additive is characterized in that the mass ratio of each component in the product is as follows: 90-95% of manganese metal, 4-10% of metal aluminum, 0.8% of binder and 0.2% of release agent; the metal manganese is prepared into powder by gas atomization after the electrolytic metal manganese sheet is melted, the manganese content of the metal manganese powder is more than or equal to 99.7 percent, the oxygen content is less than or equal to 0.1 percent, the selenium content is less than or equal to 0.01 percent, and the iron content and the silicon content are less than or equal to 0.1 percent; the aluminum content of the metal aluminum is more than or equal to 99.8 percent; the metal aluminum is bonded or wrapped outside the metal manganese powder particles.
2. The high-performance manganese additive according to claim 1, wherein the finished product has a density of 3.8g to 4.5g/cm and is obtained by carrying out thin-film dry-rolling and dry-rolling on a thin-film roll, wherein the finished product has a weight of 200g to 800g per unit weight, and is obtained by carrying out thin-film dry-rolling and dry-rolling on a thin-film roll.
3. The high performance manganese additive of claim 1, wherein said binder is ethylene glycol diacetate or propylene glycol stearate or a mixture of both; the release agent is zinc stearate.
4. The high performance manganese additive of claim 1, wherein said product is obtained by the steps of:
firstly, melting electrolytic manganese metal sheets: putting the electrolytic manganese metal sheet into an induction smelting furnace, controlling the smelting temperature to 1350-1500 ℃, and refining the molten manganese liquid to remove upper-layer scum;
secondly, atomizing to prepare powder: introducing pure carbon dioxide gas into an atomizer, sucking molten manganese liquid into the atomizer, and atomizing the manganese liquid into small droplets in an atomizing chamber; introducing carbon dioxide gas into a Venturi powder sprayer, sucking the excessively fine manganese metal powder into the Venturi powder sprayer, spraying the excessively fine manganese metal powder into an atomizing chamber, colliding and adsorbing with atomized manganese liquid drops to condense the manganese metal powder into powder, recycling the excessively fine manganese metal powder, accelerating the condensation of manganese liquid, further adjusting the temperature of the atomizing chamber by using a cooling coil and a water cooling jacket, and controlling the temperature in the atomizing chamber to be 600-750 ℃; controlling the pressure of carbon dioxide gas of the atomizer to be 0.8-4 MPa;
thirdly, wrapping and cooling: depositing hot metal manganese powder to the bottom of the atomizing chamber, introducing carbon dioxide gas into a Venturi powder sprayer to suck aluminum powder, then introducing the metal manganese powder into the metal manganese powder, blowing the metal manganese powder out of the atomizing chamber together, entering a cooler, melting the dispersed aluminum powder in the hot manganese powder, bonding the melted aluminum powder and wrapping the surface of manganese powder particles, cooling the manganese powder particles to normal temperature through the cooler, discharging the manganese powder particles to a mixing stirrer from the lower part of the cooler, introducing powder-containing gas at an outlet at the upper part of the cooler into a first-stage separator, then introducing the powder-containing gas into a second-stage separator, finally introducing the powder discharged from a discharge outlet of the first-stage separator into the mixing stirrer, introducing the ultrafine powder discharged from a discharge outlet of the second-stage separator and a discharge outlet of the dust separator into the atomizing chamber through the Venturi powder sprayer, cooling and pressurizing tail gas at an outlet of the dust separator, recycling the carbon dioxide gas into the atomizing chamber, wherein the mass ratio of the metal manganese to the carbon dioxide gas entering the atomizing chamber is 8-20: 1, the mass ratio of metal manganese to aluminum powder entering an atomizing chamber is 10-21: 1;
fourthly, mixing and stirring: determining the manganese content of the aluminum-manganese mixed powder, blending the pure aluminum powder or manganese powder to a fixed value when the manganese content does not reach the required manganese content, adding a binder and a release agent, and uniformly mixing;
fifthly, forming and packaging: pressing and molding the powder on a forging press or a roller press, wherein the density after pressing reaches 3.8-4.5 g/cm, the single weight of each finished product is 200-800 g, packing the finished products by kraft paper bags or cartons, and accurately measuring the weight of single packing.
5. The high-performance manganese additive according to claim 4, wherein said carbon dioxide gas is a mixed gas containing more than 99.9% of carbon dioxide and less than 0.01% of oxygen.
6. The high-performance manganese additive according to claim 4, wherein said atomizing and cooling steps are performed in a sealed environment, and the oxygen content in the atmosphere is less than 0.05%.
7. The high performance manganese additive of claim 4, wherein said atomized powder has a particle size distribution of: the granularity of the metal manganese is-250 um- +150umMore than 80% of the total mass, +250um less than 5% of the total mass, +300um none, -150 um less than 15% of the total mass, -75 um less than 3% of the total mass, -45 um none; the median diameter d of the metal aluminum particle size50=140um。
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|---|---|---|---|---|
| JPH0849025A (en) * | 1994-08-05 | 1996-02-20 | Mitsui Mining & Smelting Co Ltd | Aluminum-manganese master alloy additive for producing aluminum-containing magnesium-base alloy |
| SE0201826D0 (en) * | 2002-06-14 | 2002-06-14 | Hoeganaes Ab | Powder composition |
| CN105039814B (en) * | 2015-08-28 | 2017-11-14 | 重庆润际远东新材料科技有限公司 | A kind of manganese additive for aluminium alloy and preparation method thereof |
| CN105087974B (en) * | 2015-08-28 | 2017-11-21 | 重庆润际远东新材料科技有限公司 | A kind of aluminium alloy manganese additive and preparation method thereof |
| CN106978556B (en) * | 2016-11-09 | 2019-02-26 | 湘西自治州丰达合金科技有限公司 | A kind of high-performance manganese-aluminum alloy additive and its production method |
-
2019
- 2019-10-05 CN CN202110595798.9A patent/CN113263175A/en not_active Withdrawn
- 2019-10-05 CN CN201910946177.3A patent/CN110465654B/en active Active
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| Publication number | Publication date |
|---|---|
| CN110465654A (en) | 2019-11-19 |
| CN110465654B (en) | 2021-11-09 |
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