CN104845411A - Superfine ground calcium carbonate powder production method - Google Patents
Superfine ground calcium carbonate powder production method Download PDFInfo
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Abstract
The invention belongs to the field of nonmetallic mineral processing and specifically relates to a superfine ground calcium carbonate powder production method. The method comprises the following steps: crushing the marble raw material into coarse calcium carbonate having the diameter of less than or equal to 1cm; grinding the coarse calcium carbonate by use of a dry grinding mill to obtain a calcium carbonate powder mixture; performing grading treatment on the calcium carbonate powder mixture to obtain a first-stage powder having the granularity greater than j, a second-stage powder having the granularity within the range of j-k, and the third-stage powder having the granularity less than k, next, returning the first-stage powder to the dry grinding mill for grinding, performing wet grinding on the second-stage powder, directly feeding the third-stage powder to a product homogenization silo for homogenization or wet grinding, wherein k is smaller than j; and after the all wet-ground calcium carbonate slurry is dried and crushed, homogenizing and packaging. The superfine ground calcium carbonate powder production method is capable of effectively saving the energy under the premise of guaranteeing the product quality and the production efficiency.
Description
Technical field
The invention belongs to non-metallic minerals manufacture field, be specifically related to a kind of extra fine heavy calcium carbonate powder body production method.
Background technology
The production method of water-ground limestone mainly contains dry method and wet method two kinds of methods, and dry production efficiency is high, but the fineness of product is subject to the restriction of grinding and classification technique, is difficult to the coarse whiting product producing ultra-fine fineness.Wet production powder product fineness is lower, in grinding, can also carry out modification to powder, therefore wet method is commonly used to produce ultrafine heavy calcium product, but relates to the operation such as configuration, grinding, drying of slurry in wet production, therefore production efficiency is lower, and energy consumption is also higher.Patent CN101875793A proposes a kind of dry method abrasive dust and wet grinding combines the production method of producing superfine modified heavy calcium carbonate, the meal of dry grinding is directly made into slurry, and then carry out wet grinding production superfine powder, it is high that its product has output capacity, purity is high, the features such as even particle size distribution, but analyze through contriver, in the method, part fine powder in dry grinding meal can repeat grinding, cause whole production efficiency low, energy consumption is high, fine powder simultaneously in slurry is also easily assembled in wet grinding, affect mill efficiency and quality product.
Summary of the invention
Technical problem to be solved by this invention is: provide the extra fine heavy calcium carbonate powder body production method that a kind of good product quality, production efficiency are high, energy consumption is low.
For solving the problems of the technologies described above the technical solution adopted in the present invention be: extra fine heavy calcium carbonate powder body production method, comprises the following steps:
A, be the calcium carbonate coarse fodder of diameter≤1cm by marble raw material crushing;
B, the calcium carbonate coarse fodder of diameter≤1cm to be ground by dry mill, obtain calcium carbonate powder compound;
C, calcium carbonate powder compound is carried out stage treatment, obtain the first step powder of granularity > j, granularity is the second stage powder of j ~ k, the third stage powder of granularity < k, wherein k < j, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, third stage powder adopts one of following two kinds of modes to process after collecting, when the granularity of third stage powder meet product granularity require time, direct feeding product homogenizing storehouse carries out homogenizing process, when the granularity of third stage powder be greater than product granularity require time, collection enters the second wet-milled slurry storehouse, the second wet type pulverizing mill is adopted to carry out wet grinding,
D, by after the calcium carbonate slurry drying and crushing after whole wet grinding, enter homogenizing storehouse and carry out homogenizing process, then pack.
Further: step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 300 object first step powder, granularity is the 300 object second stage, order ~ 1000 powders, granularity < 1000 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 1000 order ~ 1500 orders, third stage powder is after collecting, direct feeding product homogenizing storehouse carries out homogenizing process.
Further: step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 600 object first step powder, granularity is the 600 object second stage, order ~ 2500 powders, granularity < 2500 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders, third stage powder is after collecting, direct feeding product homogenizing storehouse carries out homogenizing process.
Further: step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 300 object first step powder, granularity is the 300 object second stage, order ~ 1000 powders, granularity < 1000 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders, third stage powder enters the second wet-milled slurry storehouse through collecting, the second wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders.
Further: in step C, wet grinding method is, water is added in calcium carbonate powder, be configured to the slurry that solid component content is 70% ~ 80%, be sent in wet type pulverizing mill by mashing pump, in wet type pulverizing mill, add the dispersion agent of slurry weight 1% ~ 3% simultaneously, then in grinding medium, complete grinding.
Further: dispersion agent is sodium polyacrylate.
Further: grinding medium is zirconium aluminium composite bead.
Further: wet type pulverizing mill is at least 2, parallel-series grinding.
Further: in wet grinding process, while adding dispersion agent, add the activator of slurry weight 2% ~ 5% in wet type pulverizing mill, activator is stearic acid late or titanate coupling agent.
Further: in step D, the drying temperature of calcium carbonate slurry is 250 DEG C ~ 280 DEG C.
The invention has the beneficial effects as follows: stage treatment is carried out to the meal of dry grinding, remove the powder of large size and small size particle diameter, the second stage powder getting median diameter carries out wet grinding, wet grinding efficiency can be improved, reduce production unit energy consumption, simultaneously product cut size narrow distribution, product fineness evenly; In addition, also pre-separation is out for the third stage powder of small size particle diameter, third stage powder is avoided to reassemble in wet grinding, improve mill efficiency and quality product, third stage powder also can directly use as final superfine powder product or process other specification products further simultaneously, improves the product rate of output.
Embodiment
Extra fine heavy calcium carbonate powder body production method, comprises the following steps:
A, by marble raw material by hammer crushing crusher machine, the marble of sieve cut-off footpath≤20 centimetre, puts in jaw crusher by vibration feeder, obtains the calcium carbonate coarse fodder of diameter≤1 centimetre through fragmentation;
B, by the calcium carbonate coarse fodder of diameter≤1cm by bobbing machine send into dry mill grind, obtain calcium carbonate powder compound; Dry mill can select raymond mill;
C, by multi-stage classifier, calcium carbonate powder compound is carried out stage treatment, obtain the first step powder of granularity > j, granularity is the second stage powder of j ~ k, the third stage powder of granularity < k, wherein k < j, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, third stage powder adopts one of following two kinds of modes to process after collecting, when the granularity of third stage powder meet product granularity require time, direct feeding product homogenizing storehouse carries out homogenizing process, when the granularity of third stage powder be greater than product granularity require time, collection enters the second wet-milled slurry storehouse, the second wet type pulverizing mill is adopted to carry out wet grinding, the processing mode of third stage powder is determined according to the value of k,
D, by after the calcium carbonate slurry drying and crushing after whole wet grinding, enter homogenizing storehouse and carry out homogenizing process, then pack.If third stage powder has also carried out wet grinding, then comprise the calcium carbonate slurry that the calcium carbonate slurry obtained after the powder wet grinding of the second stage, the second wet type pulverizing mill will obtain after the wet grinding of third stage powder by the first wet type pulverizing mill; If third stage powder sends into product homogenizing storehouse, then only include the calcium carbonate slurry that the first wet type pulverizing mill will obtain after the powder wet grinding of the second stage.
Particularly, in step C, the value of j and k is determined according to the product granularity of extra fine heavy calcium carbonate powder body, the product granularity of extra fine heavy calcium carbonate powder body is often 1000 order ~ 1500 orders, 2500 two kinds, order ~ 3000 orders, the value of k gets the maximum value of product granularity usually, namely when product granularity is 1000 order ~ 1500 order, k is 1000 orders, namely when product granularity is 2500 order ~ 3000 order, k is 2500 orders, and j can according to determining value again after test, in the present embodiment, when product granularity is 1000 order ~ 1500 order, k is 1000 orders, j is 300 orders, when product granularity is 2500 order ~ 3000 order, k is 2500 orders, j is 600 orders.
When product granularity is 1000 order ~ 1500 order, step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 300 object first step powder, granularity is the 300 object second stage, order ~ 1000 powders, granularity < 1000 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 1000 order ~ 1500 orders, third stage powder is after collecting, direct feeding product homogenizing storehouse carries out homogenizing process.
When product granularity is 2500 order ~ 3000 order, step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 600 object first step powder, granularity is the 600 object second stage, order ~ 2500 powders, granularity < 2500 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders, third stage powder is after collecting, direct feeding product homogenizing storehouse carries out homogenizing process.
Preferably, when product granularity is 2500 order ~ 3000 order, step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 300 object first step powder, granularity is the 300 object second stage, order ~ 1000 powders, granularity < 1000 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders, third stage powder enters the second wet-milled slurry storehouse through collecting, the second wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders.Adopt which, second stage powder and third stage powder are separated wet grinding, due to for wet grinding diameter of particle distribution narrower, thus, product granularity evenly, production efficiency is higher.
Preferably, in step C, wet grinding method is, water is added in calcium carbonate powder, be configured to the slurry that solid component content is 70% ~ 80%, be sent in wet type pulverizing mill by mashing pump, in wet type pulverizing mill, add the dispersion agent of slurry weight 1% ~ 3% simultaneously, then in grinding medium, complete grinding; Wherein, dispersion agent is preferably sodium polyacrylate, and grinding medium is preferably zirconium aluminium composite bead.
Preferably, wet type pulverizing mill is at least 2, and parallel-series is ground.In step C, in wet grinding process, the product granularity after 1 wet type pulverizing mill grinding is 2500 order ~ 3000 orders, and adopts 2 milling tandem, then product granularity can reach 4000 order ~ 5000 orders.Adopt the mode of milling tandem, the product of thinner specification can be produced.
Preferably, in wet grinding process, while adding dispersion agent, add the activator of slurry weight 2% ~ 5% in wet type pulverizing mill, activator is stearic acid late or titanate coupling agent, can enhance product performance.
Preferably, in step D, the drying temperature of calcium carbonate slurry is 250 DEG C ~ 280 DEG C.
Embodiment 1
1. by marble raw material by hammer crushing crusher machine, the marble of sieve cut-off footpath≤20 centimetre, puts in jaw crusher by vibration feeder, obtains the calcium carbonate coarse fodder of diameter≤1 centimetre through fragmentation;
2. the calcium carbonate coarse fodder of diameter≤1cm is sent into raymond mill by bobbing machine to grind, obtain calcium carbonate powder compound;
3. by multi-stage classifier, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 300 object first step powder, granularity is the 300 object second stage, order ~ 1000 powders, granularity < 1000 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 1000 order ~ 1500 orders, third stage powder, after collecting, is directly sent into product homogenizing storehouse and is carried out homogenizing process; The wet grinding method of second stage powder is: in calcium carbonate powder, add water, be configured to the slurry that solid component content is 75%, be sent in wet type pulverizing mill by mashing pump, in wet type pulverizing mill, add the sodium polyacrylate of slurry weight 1.5% simultaneously, then in zirconium aluminium composite bead, complete grinding.
4., after calcium carbonate slurry drying and crushing second stage powder obtained after wet grinding, enter homogenizing storehouse and carry out homogenizing process, then pack.The drying temperature of calcium carbonate slurry is 250 DEG C ~ 280 DEG C.
The present embodiment, can energy efficient 15% under the prerequisite ensureing quality product, production efficiency.
Embodiment 2
1. by marble raw material by hammer crushing crusher machine, the marble of sieve cut-off footpath≤20 centimetre, puts in jaw crusher by vibration feeder, obtains the calcium carbonate coarse fodder of diameter≤1 centimetre through fragmentation;
2. the calcium carbonate coarse fodder of diameter≤1cm is sent into raymond mill by bobbing machine to grind, obtain calcium carbonate powder compound;
3. by multi-stage classifier, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 600 object first step powder, granularity is the 600 object second stage, order ~ 2500 powders, granularity < 2500 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders, third stage powder, after collecting, is directly sent into product homogenizing storehouse and is carried out homogenizing process; The wet grinding method of second stage powder is: in calcium carbonate powder, add water, be configured to the slurry that solid component content is 70%, be sent in wet type pulverizing mill by mashing pump, in wet type pulverizing mill, add the sodium polyacrylate of slurry weight 1% simultaneously, add the stearic acid late of slurry weight 5%, then in zirconium aluminium composite bead, complete grinding.
4., after calcium carbonate slurry drying and crushing second stage powder obtained after wet grinding, enter homogenizing storehouse and carry out homogenizing process, then pack.The drying temperature of calcium carbonate slurry is 250 DEG C ~ 280 DEG C.
The present embodiment, can energy efficient 13% under the prerequisite ensureing quality product, production efficiency.
Embodiment 3
1. by marble raw material by hammer crushing crusher machine, the marble of sieve cut-off footpath≤20 centimetre, puts in jaw crusher by vibration feeder, obtains the calcium carbonate coarse fodder of diameter≤1 centimetre through fragmentation;
2. the calcium carbonate coarse fodder of diameter≤1cm is sent into raymond mill by bobbing machine to grind, obtain calcium carbonate powder compound;
3. by multi-stage classifier, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 300 object first step powder, granularity is the 300 object second stage, order ~ 1000 powders, granularity < 1000 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders, third stage powder enters the second wet-milled slurry storehouse through collecting, the second wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders.The wet grinding method of second stage powder, third stage powder is: in calcium carbonate powder, add water, be configured to the slurry that solid component content is 80%, be sent in wet type pulverizing mill by mashing pump, in wet type pulverizing mill, add the sodium polyacrylate of slurry weight 3% simultaneously, add the titanate coupling agent of slurry weight 3%, then in zirconium aluminium composite bead, complete grinding.The wet grinding of second stage powder, third stage powder completes respectively in independently grinding system.
4., after calcium carbonate slurry drying and crushing second stage powder, third stage powder obtained after wet grinding, enter homogenizing storehouse and carry out homogenizing process, then pack.The drying temperature of calcium carbonate slurry is 250 DEG C ~ 280 DEG C.
The present embodiment, can energy efficient 20% under the prerequisite ensureing quality product, production efficiency.
Claims (10)
1. extra fine heavy calcium carbonate powder body production method, is characterized in that, comprises the following steps:
A, be the calcium carbonate coarse fodder of diameter≤1cm by marble raw material crushing;
B, the calcium carbonate coarse fodder of diameter≤1cm to be ground by dry mill, obtain calcium carbonate powder compound;
C, calcium carbonate powder compound is carried out stage treatment, obtain the first step powder of granularity > j, granularity is the second stage powder of j ~ k, the third stage powder of granularity < k, wherein k < j, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, third stage powder adopts one of following two kinds of modes to process after collecting, when the granularity of third stage powder meet product granularity require time, direct feeding product homogenizing storehouse carries out homogenizing process, when the granularity of third stage powder be greater than product granularity require time, collection enters the second wet-milled slurry storehouse, the second wet type pulverizing mill is adopted to carry out wet grinding,
D, by after the calcium carbonate slurry drying and crushing after whole wet grinding, enter homogenizing storehouse and carry out homogenizing process, then pack.
2. extra fine heavy calcium carbonate powder body production method as claimed in claim 1, it is characterized in that: step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 300 object first step powder, granularity is the 300 object second stage, order ~ 1000 powders, granularity < 1000 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 1000 order ~ 1500 orders, third stage powder is after collecting, direct feeding product homogenizing storehouse carries out homogenizing process.
3. extra fine heavy calcium carbonate powder body production method as claimed in claim 1, it is characterized in that: step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 600 object first step powder, granularity is the 600 object second stage, order ~ 2500 powders, granularity < 2500 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders, third stage powder is after collecting, direct feeding product homogenizing storehouse carries out homogenizing process.
4. extra fine heavy calcium carbonate powder body production method as claimed in claim 1, it is characterized in that: step C employing method is, calcium carbonate powder compound is carried out stage treatment, obtain granularity > 300 object first step powder, granularity is the 300 object second stage, order ~ 1000 powders, granularity < 1000 object third stage powder, and first step powder is returned dry mill grind, second stage powder is collected after entering the first wet-milled slurry storehouse, the first wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders, third stage powder enters the second wet-milled slurry storehouse through collecting, the second wet type pulverizing mill is adopted to carry out wet grinding, be ground to 2500 order ~ 3000 orders.
5. extra fine heavy calcium carbonate powder body production method as claimed in claim 1, it is characterized in that: wet grinding method described in step C is, water is added in calcium carbonate powder, be configured to the slurry that solid component content is 70% ~ 80%, be sent in wet type pulverizing mill by mashing pump, in wet type pulverizing mill, add the dispersion agent of slurry weight 1% ~ 3% simultaneously, then in grinding medium, complete grinding.
6. extra fine heavy calcium carbonate powder body production method as claimed in claim 5, is characterized in that: described dispersion agent is sodium polyacrylate.
7. extra fine heavy calcium carbonate powder body production method as claimed in claim 5, is characterized in that: described grinding medium is zirconium aluminium composite bead.
8. extra fine heavy calcium carbonate powder body production method as claimed in claim 5, is characterized in that: described wet type pulverizing mill is at least 2, and parallel-series is ground.
9. extra fine heavy calcium carbonate powder body production method as claimed in claim 5, it is characterized in that: in wet grinding process, while adding dispersion agent, add the activator of slurry weight 2% ~ 5% in wet type pulverizing mill, described activator is stearic acid late or titanate coupling agent.
10. extra fine heavy calcium carbonate powder body production method as claimed in claim 1, it is characterized in that: in step D, the drying temperature of calcium carbonate slurry is 250 DEG C ~ 280 DEG C.
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Cited By (12)
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| CN105239748A (en) * | 2015-11-13 | 2016-01-13 | 哈尔滨中大型材科技股份有限公司 | Polymer PVC decoration product and manufacturing method |
| CN105348861A (en) * | 2015-10-23 | 2016-02-24 | 谭乔 | Functional calcium carbonate powder and production method thereof |
| CN106497143A (en) * | 2016-11-02 | 2017-03-15 | 四川荥经开全实业有限公司 | A kind of method that utilization marble wastes reclaim dicalcium powder |
| CN106957538A (en) * | 2017-04-17 | 2017-07-18 | 华东理工大学 | A kind of preparation method of ultra-fine coating calcium carbonate slurry |
| CN107043556A (en) * | 2017-04-17 | 2017-08-15 | 华东理工大学 | A kind of preparation method of the narrow coarse whiting of particle diameter distribution |
| CN107187902A (en) * | 2017-06-30 | 2017-09-22 | 广西贺州市科隆粉体有限公司 | A kind of powdered whiting material homogenizer method |
| CN107345871A (en) * | 2017-06-30 | 2017-11-14 | 广西贺州市科隆粉体有限公司 | A kind of calcium carbonate material quality detection method |
| CN108948791A (en) * | 2018-05-10 | 2018-12-07 | 桂林永福恒达实业有限公司 | A kind of micro mist calcium carbonate dry type preparation method of high-purity |
| CN109535483A (en) * | 2018-12-21 | 2019-03-29 | 湖南磊鑫新材料科技有限公司 | The preparation method of film modeling master batch coarse whiting functional stuffing |
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| CN110238059A (en) * | 2019-07-06 | 2019-09-17 | 四川玉塑新材料科技有限公司 | A kind of calcium carbonate powder multiclass classification stage division |
| CN115806303A (en) * | 2021-09-13 | 2023-03-17 | 中国科学院过程工程研究所 | Method for preparing superfine ground calcium carbonate and co-producing active calcium oxide by using marble waste residues |
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| CN105348861A (en) * | 2015-10-23 | 2016-02-24 | 谭乔 | Functional calcium carbonate powder and production method thereof |
| CN105239748A (en) * | 2015-11-13 | 2016-01-13 | 哈尔滨中大型材科技股份有限公司 | Polymer PVC decoration product and manufacturing method |
| CN106497143A (en) * | 2016-11-02 | 2017-03-15 | 四川荥经开全实业有限公司 | A kind of method that utilization marble wastes reclaim dicalcium powder |
| CN106497143B (en) * | 2016-11-02 | 2018-04-06 | 四川荥经开全实业有限公司 | A kind of method that dicalcium powder is reclaimed using marble wastes |
| CN106957538A (en) * | 2017-04-17 | 2017-07-18 | 华东理工大学 | A kind of preparation method of ultra-fine coating calcium carbonate slurry |
| CN107043556A (en) * | 2017-04-17 | 2017-08-15 | 华东理工大学 | A kind of preparation method of the narrow coarse whiting of particle diameter distribution |
| CN107345871A (en) * | 2017-06-30 | 2017-11-14 | 广西贺州市科隆粉体有限公司 | A kind of calcium carbonate material quality detection method |
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| CN107345871B (en) * | 2017-06-30 | 2020-06-19 | 广西贺州市科隆粉体有限公司 | Calcium carbonate raw material quality detection method |
| CN108948791A (en) * | 2018-05-10 | 2018-12-07 | 桂林永福恒达实业有限公司 | A kind of micro mist calcium carbonate dry type preparation method of high-purity |
| CN109535483A (en) * | 2018-12-21 | 2019-03-29 | 湖南磊鑫新材料科技有限公司 | The preparation method of film modeling master batch coarse whiting functional stuffing |
| CN109627467A (en) * | 2018-12-21 | 2019-04-16 | 湖南磊鑫新材料科技有限公司 | The preparation method of non-woven fabrics master batch filler |
| CN110238059A (en) * | 2019-07-06 | 2019-09-17 | 四川玉塑新材料科技有限公司 | A kind of calcium carbonate powder multiclass classification stage division |
| CN115806303A (en) * | 2021-09-13 | 2023-03-17 | 中国科学院过程工程研究所 | Method for preparing superfine ground calcium carbonate and co-producing active calcium oxide by using marble waste residues |
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