CN103333530B - Aluminum powder pigment and its dry milling manufacturing method - Google Patents
Aluminum powder pigment and its dry milling manufacturing method Download PDFInfo
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- CN103333530B CN103333530B CN201310280142.3A CN201310280142A CN103333530B CN 103333530 B CN103333530 B CN 103333530B CN 201310280142 A CN201310280142 A CN 201310280142A CN 103333530 B CN103333530 B CN 103333530B
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Abstract
The invention provides an aluminum powder pigment, which is formed by mixing of the following components by weight: 96%-99% of aluminum powder; 0.75%-3% of stearic acid; 0.2-0.7% of a coupling agent; and 0.05%-0.3% of a dispersant. The dry milling manufacturing method of the aluminum powder pigment consists of the steps of: ball milling, grading screening, first stage finished product synthesis and second stage finished product synthesis. In the invention, a macromolecular coupling agent with a coordination group is adopted as a protective agent, the stearic acid plays a milling assisting role, and the milling means is changed overall. The method employs graded constant speed impact-free milling, three-level screening, and two-stage discharge to improve the diameter-thickness ratio and particle uniformity of the product. Nitrogen cooling and automatic temperature control protection are adopted as supplementary means to reduce the phenomenon of aluminum powder oxidation rate increase caused by temperature rise during preparation, and the likely surface oxidation problem in an aluminum powder processing process can be effectively solved, so that the sheet aluminum powder pigment with strong oxidation resistance, durable color and adjustable brightness. Also, according to demands and through corresponding blending, production of products with a variety of specification standard particle sizes can be realized.
Description
Technical field
The present invention relates to the manufacturing technology field of solid metal powder pigment, especially relate to a kind of dry grinding manufacture method of aluminium powder pigment.
Background technology
The aluminium powder particle of pigment is lepidiod, due to lepidiod particle state, and aluminium powder thus there is metalluster effect and effect and function of shielding effect.And aluminium powder to have fusing point low, reach the characteristic that concentration can be exploded, therefore need to pay special attention to the safety control such as explosion-proof, dust-proof in production process, current metallic aluminium powder industrialized production is divided into dry method and wet method, modern most aluminium powder pigment all adopts wet production mode, namely wet process technique is add petroleum solvent in ball mill, Fine Aluminum Powder is mixed to be placed in ball mill with organic solvent, dispersion agent etc. by a certain percentage and grinds, after through screening, pressure consider, make aluminium paste filter cake, again filter cake is dried, be sieved into the aluminium powder of certain particle size.But owing to mostly adopting wet screening technique, the dispersion of product and classification difficulty are large, and the aluminum powder particle size wider distribution that this method is produced, regular shape degree is poor, and surface flatness is not good enough, and aluminium powder sticking power loosely, product shelf life is short, makes the problems such as planeness after coating or ink is bad.
Summary of the invention
The object of the invention is to solve the problems of the prior art, and provide a kind of there is epigranular and the stable aluminium powder pigment of good metalluster, water surface covering force and oxidation-resistance and dry grinding manufacture method thereof.
The technical solution adopted in the present invention is such: a kind of aluminium powder pigment, is mixed: aluminium powder: 96% ~ 99% by following component and weight proportion; Stearic acid: 0.75% ~ 3%; Coupling agent: 0.2% ~ 1%; Dispersion agent: 0.05% ~ 0.3%.
Preferably, a kind of aluminium powder pigment, is mixed by following component and weight proportion: aluminium powder: 96%; Stearic acid: 3%; Coupling agent: 0.7%; Dispersion agent: 0.3%.
Preferably, a kind of aluminium powder pigment, is mixed by following component and weight proportion: aluminium powder: 99%; Stearic acid: 0.75%; Coupling agent: 0.2%; Dispersion agent: 0.05%.
Preferably, described coupling agent adopts titanate coupling agent.
The dry grinding manufacture method of aluminium powder pigment, comprises the following steps:
(1) ball milling: in horizontal ball mill, be built-in with multiple ball milling, aluminium powder is put into raw material hopper, and to allocate the weight percent accounting for aluminium powder into be the coupling agent of 1.5% ~ 2%, control weight feed by feeder, and by blower fan, the aluminium powder after is quantitatively blown in horizontal ball mill, under nitrogen protection, keeping the temperature in horizontal ball mill to be 40 ~ 70 DEG C, is 20 ~ 80r/min in conjunction with Frequency Converter Control horizontal ball mill rotating speed; Carry out ball milling work, the powder outlet quantity controlling every 30 minutes is 1.5kg ~ 2.5kg, thus obtains the aluminium powder of scroll sheet;
(2) gradation sizing: by the aluminium powder after grinding in step (1), after being blown into the first grading machine screening successively by blower fan, the large aluminium powder of grain is transmitted back to ball mill and continues grinding, the aluminium powder that granularity is little is transported in the second grading machine, after the second grading machine sieves again, obtain one-level aluminium powder and secondary aluminium powder; Wherein one-level aluminium powder is transported to the first batch hopper, and secondary aluminium powder is transported to the second batch hopper through dust-precipitator; The aluminium powder particle diameter that described granularity is large is 1.5 times that are not less than finished product average particle diameter, the aluminium powder particle diameter that granularity is little is 1.5 times that are less than finished product average particle diameter, described one-level aluminium powder particle diameter is 1.2 times that are not less than finished product average particle diameter, and secondary aluminium powder particle diameter is 1.2 times that are less than finished product average particle diameter.
(3) first step finished product synthesis: should by sensor meter double infection by the one-level aluminium powder in the first batch hopper in step (2), and through the self-feeder of the first batch hopper, accurate quantitative analysis is transported in the first polished ball grinding machine, in addition first joins the mixed powder of powder bucket built with stearic acid and dispersion agent, and the mixed weight ratio wherein between stearic acid and dispersion agent is: 1:(0.06 ~ 0.08); And the feeder of powder bucket is joined by first, through the first batch hopper metering, thus the weight percent that interpolation accounts for one-level aluminium powder is the mixed powder of 1.5% ~ 3%, be transported in the first polished ball grinding machine, under nitrogen protection, keeping the temperature in the first polished ball grinding machine to be 20 ~ 50 DEG C, is 10 ~ 20r/min in conjunction with Frequency Converter Control first polished ball mill speed; Carry out polishing work, controlling powder outlet quantity hourly is 4kg ~ 12kg, thus discharging obtains into the one-level finished product aluminium powder pigment of flat shape or scroll sheet;
(4) second stage finished product synthesis: should by sensor meter double infection by the secondary aluminium powder in the second batch hopper in step (2), and through the self-feeder of the second batch hopper, accurate quantitative analysis is transported in the second polished ball grinding machine, in addition second joins the mixed powder of powder bucket built with stearic acid and dispersion agent, and the mixed weight ratio wherein between stearic acid and dispersion agent is: 1:(0.06 ~ 0.08); And the feeder of powder bucket is joined by second, through the second batch hopper metering, thus the weight percent that interpolation accounts for secondary aluminium powder is the mixed powder of 1.5% ~ 3%, be transported in the second polished ball grinding machine, under nitrogen protection, keeping the temperature in the second polished ball grinding machine to be 20 ~ 50 DEG C, is 10 ~ 20r/min in conjunction with Frequency Converter Control first polished ball mill speed; Carry out polishing work, controlling powder outlet quantity hourly is 4kg ~ 12kg, thus discharging obtains into the secondary finished product aluminium powder pigment of flat shape or scroll sheet.
Preferably, the specification of described finished product average particle diameter is 60 μm, 48 μm, 36 μm, 27 μm, 20 μm, 15 μm, 11 μm, 8 μm, 6 μm, 5 μm, 4 μm, 3 μm any one specification wherein.
Preferably, ball milling in described horizontal ball mill adopts diameter to be the granulated glass sphere of 2mm ~ 9mm or zirconium oxide bead or fluorine carbon steel pearl; Ball milling in described first polished ball grinding machine and the second polished ball grinding machine adopts diameter to be the granulated glass sphere of 1mm ~ 3mm or zirconium oxide bead or fluorine carbon steel pearl.
Preferably, described nitrogen continues safe voltage stabilizing winding-up by external nitrogen production equipment through water cooling tower and supplies or supplied by nitrogen pot, controls airshed and is 30ml/min.All simultaneously nitrogen is passed into the ball mill of correspondence, the first polished ball grinding machine, the second polished ball grinding machine after vacuumizing through the first grading machine, the second grading machine, dust-precipitator in described step (1), (3), (4).
Preferably, described ball mill, the first polished ball grinding machine and the second polished ball grinding machine are equipped with venting port, described venting port is circumscribed with filtration water bottle, keeps the stable gas pressure of ball mill, the first polished ball grinding machine and the second polishing ball grinder interior, and can filter the unnecessary tail gas of discharge and powder.
Preferably, temperature on ball mill in described step (1), (3), (4), the first polished ball grinding machine and the second polished ball grinding machine controls to adopt infrared measurement of temperature, and in conjunction with temperature alarming device, when temperature exceedes the warning temperature value of setting, after 2 ~ 3 minutes, production system will be automatically out of service.Described blower fan is circumscribed with anemoscope and air compressor machine, anemoscope auto-control compressor operation, for blower fan provides required constant wind speed.
By adopting preceding solution, the invention has the beneficial effects as follows: adopt polymer coupler with coordinating group as protective material, stearic acid plays grinding aid effectiveness, overall change grinds mode, use classification at the uniform velocity without impact grinding, three grades of screenings, two-stage discharging, improve radius-thickness ratio and the particle uniformity of product, adopt nitrogen cooling and temperature automatically controlled protection as supplementary means, reducing temperature rising in preparation process causes aluminium powder oxidation speed to increase phenomenon, a surperficial oxidizable difficult problem in effective solution aluminium powder course of processing, thus it is strong to obtain oxidation-resistance, fast in colour, bright-coloured adjustable flake-like aluminium powder pigment.
Embodiment
Describe the present invention particularly with embodiment below, scope of the present invention is not by the restriction of embodiment.
A kind of aluminium powder pigment of the present invention, can be mixed by following component and weight proportion, and its corresponding embodiment 1-3 proportioning is as follows:
| Aluminium powder | Stearic acid | Coupling agent | Dispersion agent | |
| Embodiment 1 | 96％ | 3％ | 0.7％ | 0.3％ |
| Embodiment 2 | 99％ | 0.75％ | 0.2％ | 0.05％ |
| Embodiment 3 | 97％ | 2.2％ | 0.6％ | 0.2％ |
Wherein, preferred forms, coupling agent adopts titanate coupling agent.
The dry grinding manufacture method of aluminium powder pigment, comprises the following steps:
(1) ball milling: in horizontal ball mill, diameter is adopted to be that the glass sphere of 1mm-9mm or zirconium oxide bead or fluorine carbon steel pearl are as ball milling, aluminium powder is put into raw material hopper, and to allocate the weight percent accounting for aluminium powder into be the coupling agent of 1.5% ~ 2%, weight feed is controlled by feeder, and by blower fan, the aluminium powder after is quantitatively blown in ball mill, producing equipment circulation voltage stabilizing winding-up by external nitrogen is fed in ball mill, control airshed is 30ml/min, thus under nitrogen protection, adopt infrared measurement of temperature, the temperature in ball mill is kept to be 40 ~ 70 DEG C, and in conjunction with temperature alarming device, when temperature exceedes the warning temperature value of setting, after 2 ~ 3 minutes, production system will be automatically out of service, production safety is reliable, be 20 ~ 80r/min in conjunction with Frequency Converter Control drum's speed of rotation, carry out ball milling work, blower fan is circumscribed with anemoscope and air compressor machine in addition, anemoscope auto-control compressor operation, for blower fan provides required constant wind speed, thus the powder outlet quantity effectively controlling every 30 minutes is 1.5kg ~ 2.5kg, thus obtain the aluminium powder of scroll sheet,
(2) gradation sizing: by the aluminium powder after grinding in step (1), after being blown into the first grading machine screening successively by blower fan, the aluminium powder that granularity is large is transmitted back to ball mill and continues grinding, the aluminium powder that granularity is little is transported in the second grading machine, after the second grading machine sieves again, obtain one-level aluminium powder and secondary aluminium powder; Wherein one-level aluminium powder is transported to the first batch hopper, and secondary aluminium powder is transported to the second batch hopper through dust-precipitator; The aluminium powder particle diameter that described granularity is large is 1.5 times that are not less than finished product average particle diameter, the aluminium powder particle diameter that granularity is little is 1.5 times that are less than finished product average particle diameter, described one-level aluminium powder particle diameter is 1.2 times that are not less than finished product average particle diameter, and secondary aluminium powder particle diameter is 1.2 times that are less than finished product average particle diameter.All be evacuated in described first grading machine and the second grading machine and have and carry out work under nitrogen protection effect outside.The specification of finished product average particle diameter is selected needed for the condition of production, the finished product average particle diameter of normal production is 60 μm, 48 μm, 36 μm, 27 μm, 20 μm, 15 μm, 11 μm, 8 μm, 6 μm, 5 μm, 4 μm, 3 μm, several specification above, thus facilitate manufacturer according to the corresponding outfit of own situation;
(3) first step finished product synthesis: by the one-level aluminium powder in the first batch hopper in step (2) by sensor meter weight, and be transported in the first polished ball grinding machine through the feeder of the first batch hopper, in addition first joins the mixed powder of powder bucket built with stearic acid and dispersion agent, and the mixed weight ratio wherein between stearic acid and dispersion agent is: 1:0.07; And the feeder of powder bucket is joined by first, through the first batch hopper metering, thus the weight percent that interpolation accounts for one-level aluminium powder is the mixed powder of 1% ~ 2%, be transported in the first polished ball grinding machine, under nitrogen protection, keeping the temperature in the first polished ball grinding machine to be 20 ~ 50 DEG C, is 10 ~ 20r/min in conjunction with Frequency Converter Control first polished ball mill speed; Carry out polishing work, controlling powder outlet quantity hourly is 4kg ~ 12kg, thus discharging obtains into the one-level finished product aluminium powder pigment of flat shape or scroll sheet;
(4) second stage finished product synthesis: by the secondary aluminium powder in the second batch hopper in step (2) by sensor meter weight, and be transported in the second polished ball grinding machine through the feeder of the second batch hopper, in addition second joins the mixed powder of powder bucket built with stearic acid and dispersion agent, and the mixed weight ratio wherein between stearic acid and dispersion agent is: 1:0.07; And the feeder of powder bucket is joined by second, through the second batch hopper metering, thus the weight percent that interpolation accounts for secondary aluminium powder is the mixed powder of 1% ~ 2%, be transported in the second polished ball grinding machine, under nitrogen protection, keeping the temperature in the second polished ball grinding machine to be 20 ~ 50 DEG C, is 10 ~ 20r/min in conjunction with Frequency Converter Control first polished ball mill speed; Carry out polishing work, controlling powder outlet quantity hourly is 4kg ~ 12kg, thus discharging obtains into the secondary finished product aluminium powder pigment of flat shape or scroll sheet;
Described ball mill, the first polished ball grinding machine and the second polished ball grinding machine are equipped with venting port, described venting port is circumscribed with filtration water bottle, keep the stable gas pressure of ball mill, the first polished ball grinding machine and the second polishing ball grinder interior, and the unnecessary tail gas of discharge and powder can be filtered, ensure that air ambient cleans.
Adopt aluminium powder pigment of the present invention and dry method manufacture method, use ball milling-gradation sizing-grading ball milling polishing, thus produce multistage finished product aluminium powder pigment, also two-shipper ball milling-gradation sizing-grading ball milling polishing can be carried out or after carrying out ball milling polishing-gradation sizing-two-shipper ball milling in addition, corresponding structure production sequence arrangement, and can according to customer demand, carry out rotating speed, the parameter specification adjustment of grading machine, equipment adjustment cloth sequence is convenient, practicality is high, thus realize pigment powder and reach regular shape, fine size and not oxidizable, photosensitivity is strong, the effect that opacifying power is large, integral production process Environmental Safety is reliable.
Above-described, be only preferred embodiment of the present invention, scope of the invention process can not be limited, every equalization change of doing according to the present patent application the scope of the claims and decoration, all should still belong in scope that the present invention contains.
Claims (6)
1. a dry grinding manufacture method for aluminium powder pigment, is characterized in that: comprise the following steps:
(1) ball milling: in horizontal ball mill, be built-in with multiple ball milling, aluminium powder is put into raw material hopper, and to allocate the weight percent accounting for aluminium powder into be the coupling agent of 1.5% ~ 2%, control weight feed by feeder, and by blower fan, the aluminium powder after is quantitatively blown in horizontal ball mill, under nitrogen protection, keeping the temperature in horizontal ball mill to be 40 ~ 70 DEG C, is 20 ~ 80r/min in conjunction with Frequency Converter Control horizontal ball mill rotating speed; Carry out ball milling work, the powder outlet quantity controlling every 30 minutes is 1.5kg ~ 2.5kg, thus obtains the aluminium powder of scroll sheet;
(2) gradation sizing: by the aluminium powder after grinding in step (1), after being blown into the first grading machine screening successively by blower fan, the aluminium powder that granularity is large is transmitted back to ball mill and continues grinding, the aluminium powder that granularity is little is transported in the second grading machine, after the second grading machine sieves again, obtain one-level aluminium powder and secondary aluminium powder; Wherein one-level aluminium powder is transported to the first batch hopper, and secondary aluminium powder is transported to the second batch hopper through dust-precipitator; The aluminium powder particle diameter that described granularity is large is 1.5 times that are not less than finished product average particle diameter, the aluminium powder particle diameter that granularity is little is 1.5 times that are less than finished product average particle diameter, described one-level aluminium powder particle diameter is 1.2 times that are not less than finished product average particle diameter, and secondary aluminium powder particle diameter is 1.2 times that are less than finished product average particle diameter;
(3) first step finished product synthesis: should by sensor meter double infection by the one-level aluminium powder in the first batch hopper in step (2), and through the self-feeder of the first batch hopper, accurate quantitative analysis is transported in the first polished ball grinding machine, in addition first joins the mixed powder of powder bucket built with stearic acid and dispersion agent, and the mixed weight ratio wherein between stearic acid and dispersion agent is: 1:(0.06 ~ 0.08); And the feeder of powder bucket is joined by first, through the first batch hopper metering, thus the weight percent that interpolation accounts for one-level aluminium powder is the mixed powder of 1.5% ~ 3%, be transported in the first polished ball grinding machine, under nitrogen protection, keeping the temperature in the first polished ball grinding machine to be 20 ~ 50 DEG C, is 10 ~ 20r/min in conjunction with Frequency Converter Control first polished ball mill speed; Carry out polishing work, controlling powder outlet quantity hourly is 4kg ~ 12kg, thus discharging obtains into the one-level finished product aluminium powder pigment of flat shape or scroll sheet;
(4) second stage finished product synthesis: should by sensor meter double infection by the secondary aluminium powder in the second batch hopper in step (2), and through the self-feeder of the second batch hopper, accurate quantitative analysis is transported in the second polished ball grinding machine, in addition second joins the mixed powder of powder bucket built with stearic acid and dispersion agent, and the mixed weight ratio wherein between stearic acid and dispersion agent is: 1:(0.06 ~ 0.08); And the feeder of powder bucket is joined by second, through the second batch hopper metering, thus the weight percent that interpolation accounts for secondary aluminium powder is the mixed powder of 1.5% ~ 3%, be transported in the second polished ball grinding machine, under nitrogen protection, keeping the temperature in the second polished ball grinding machine to be 20 ~ 50 DEG C, is 10 ~ 20r/min in conjunction with Frequency Converter Control second polished ball mill speed; Carry out polishing work, controlling powder outlet quantity hourly is 4kg ~ 12kg, thus discharging obtains into the secondary finished product aluminium powder pigment of flat shape or scroll sheet.
2. the dry grinding manufacture method of aluminium powder pigment according to claim 1, is characterized in that: the specification of described finished product average particle diameter is 60 μm, 48 μm, 36 μm, 27 μm, 20 μm, 15 μm, 11 μm, 8 μm, 6 μm, 5 μm, 4 μm, 3 μm any one specification wherein.
3. the dry grinding manufacture method of aluminium powder pigment according to claim 1, is characterized in that: ball milling in described horizontal ball mill adopts diameter to be the granulated glass sphere of 2mm ~ 9mm or zirconium oxide bead or fluorine carbon steel pearl; Ball milling in described first polished ball grinding machine and the second polished ball grinding machine adopts diameter to be the granulated glass sphere of 1mm ~ 3mm or zirconium oxide bead or fluorine carbon steel pearl.
4. the dry grinding manufacture method of aluminium powder pigment according to claim 1, it is characterized in that: described nitrogen continues safe voltage stabilizing by external nitrogen production equipment through water cooling tower and to jet supply or by the canned supply of nitrogen, the overall airshed that controls is 30mL/min; All nitrogen is passed into after the first grading machine, the second grading machine, dust-precipitator vacuumize to the ball mill of correspondence, the first polished ball grinding machine, the second polished ball grinding machine in described step (1), (3), (4).
5. the dry grinding manufacture method of aluminium powder pigment according to claim 1, it is characterized in that: described ball mill, the first polished ball grinding machine and the second polished ball grinding machine are equipped with venting port, described venting port is circumscribed with filtration water bottle, keep the stable gas pressure of ball mill, the first polished ball grinding machine and the second polishing ball grinder interior, and the unnecessary tail gas of discharge and powder can be filtered.
6. the dry grinding manufacture method of aluminium powder pigment according to claim 1, it is characterized in that: the temperature on the ball mill in described step (1), (3), (4), the first polished ball grinding machine and the second polished ball grinding machine controls to adopt infrared measurement of temperature, and in conjunction with temperature alarming device, when temperature exceedes the warning temperature value of setting, after 2 ~ 3 minutes, production system will be automatically out of service, described blower fan is circumscribed with anemoscope and air compressor machine, anemoscope auto-control compressor operation, for blower fan provides required constant wind speed.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103613960B (en) * | 2013-11-28 | 2015-04-29 | 嘉兴市华源铝制品有限公司 | Preparation method of leafing aluminum paste |
| CN107262727B (en) * | 2017-07-03 | 2018-05-04 | 湖南金昊新材料科技股份有限公司 | A kind of method of non-solvent method production flake aluminum effect pigment |
| CN111167569B (en) * | 2019-12-31 | 2021-08-17 | 曲靖华益兴新材料有限公司 | Method and equipment for preparing easily-dispersible aluminum powder pigment by direct ball milling |
| CN111454593A (en) * | 2020-04-17 | 2020-07-28 | 安徽赛尔新材料科技有限公司 | Preparation method of mercerizing electroplating-grade aluminum paste |
| CN114733615A (en) * | 2022-03-29 | 2022-07-12 | 内蒙古旭阳新材料有限公司 | Processing method and processing system of aluminum powder paste |
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