CN101244827A - Method for producing ultra-fine calcination white bole with combination of dry and wet method - Google Patents
Method for producing ultra-fine calcination white bole with combination of dry and wet method Download PDFInfo
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- CN101244827A CN101244827A CNA2008100871971A CN200810087197A CN101244827A CN 101244827 A CN101244827 A CN 101244827A CN A2008100871971 A CNA2008100871971 A CN A2008100871971A CN 200810087197 A CN200810087197 A CN 200810087197A CN 101244827 A CN101244827 A CN 101244827A
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Abstract
The invention discloses a dry-wet combination method to prepare superfine calcined kaolin. After grinding by dry method, the kaolin raw ore grains are classified according to the grain size. The superfine with the grain greater than 1250 meshes can be made into a finished product by direct calcination. While for the meal with the grain less than 1250 meshes, dispersing agent, intercalation agent, and whitening agent can be added simultaneously under wet grinding, so as to improve the grinding efficiency, shorten the grinding time, and reduce the energy consumption during grinding process, as well as improve the mixing effect of the whitening agent and the kaolin. The meal scattered and dried after grinding, is sent into rotary kiln for calcinations. The kaolin is grinded again after calcination by wet grinding method. The dispersing agent and modifying agent are added simultaneously, to combine the superfine grinding and the modifying of product simultaneously. The modified powder is grinded to obtain the other finished product after drying and scattering. The invention allows superfine calcined kaolin with different specification during the same production line by the control of the process condition, thus reducing the working procedure, improving the added value of product, broadening the application field and product performance, so as to meet the requirements of different customers.
Description
Technical field:
The present invention relates to kaolinic production method, relate in particular to the preparation method of superfine calcined kaolin.
Background technology:
Coaseries kaolin is kaolinic a kind of, mainly is the concomitant product of coal, becomes the ore deposit separately, exists with the ore form.Coaseries kaolin is widely used in many fields such as papermaking, coating, rubber, pottery, catalyzer after calcining.The calcined kaolin chemical property is stable, is ideal filler and extension agent.Coaseries kaolin is owing to contain the part organic matter, and exists with blocky ore form, so the primary Coaseries kaolin must be through further just obtaining using after the processing.The production method of Coaseries kaolin is comparatively single at present, mainly contain " grind afterwards earlier and burn " and " burn afterwards earlier and grind " technology, " grind afterwards earlier and burn " technology and can't solve the calcining agglomeration of product, the product granularity fluctuation is big, " burn afterwards earlier and grind " technology and can't guarantee the calcining whiteness of product, the product stability of these two kinds of explained hereafter and bad adaptability, tooling cost are higher relatively.
Summary of the invention:
The objective of the invention is to solve the technical bottleneck that the calcined kaolin whiteness that exists in the present traditional technology and granularity can not be taken into account, provide a kind of operation few simultaneously, energy consumption is low, can produce the production method of different size calcined kaolin products according to different needs on a production line.
The present invention with the Coaseries kaolin dry grinding after, through gradation, the above fine powder of 1250 orders is directly broken up to handle after the calcining and is a kind of finished product.Meal below 1250 orders selects interpolation dispersion agent, intercalator, whitening agent to make slurry and carry out wet grinding as required; The grinding after drying is broken up, and advances calcined by rotary kiln; Kaolin powder after the calcining adds dispersion agent and surface-modifying agent carries out wet grinding again; After breaing up, powder drying after the grinding modification becomes another kind of finished product.Concrete processing step is:
With Coaseries kaolin:
Dry grinding is a 600--6000 purpose powder, carries out gradation;
Kaolin powder directly calcining in rotary kiln that 1250 orders are above obtains a kind of calcined kaolin products after breaing up processing;
The following kaolin powder of 1250 orders is handled by following processing step:
A. add the 0.1%-2% dispersion agent by the weight ratio with kaolin powder, being mixed with water content is the 40-60% slurry;
B. ground 10-150 minute;
C. slurry drying is broken up and is sent into 800-1000 ℃ of calcined by rotary kiln 20-80 minute;
D. the kaolin after the calcining is sent into the pulping device stirring and is made the slurry that water content is 30%--60%; Add 0.1%-2% dispersion agent and 0.1%--5% surface-modifying agent by weight ratio simultaneously with kaolin powder;
E. the slurry of steps d was ground 10-100 minute, and be another kind of calcined kaolin products after the slurry drying after levigate broken up;
Dispersion agent is sodium polyacrylate or Sodium hexametaphosphate 99 in step a and the steps d, but is not limited to this two kinds of dispersion agents;
Surface-modifying agent is organosilane, silicone oil or titanate coupling agent;
In order to shorten milling time, in step a, add the 0.1%--10% intercalator simultaneously by weight ratio with kaolin powder, intercalator be urea and Ammoniom-Acetate by 5: 1-1: 5 blended mixtures.
In order to shorten calcination time, obtain the higher product of whiteness, in step a, add the 0.1%--2% whitening agent simultaneously by weight ratio with kaolin powder, whitening agent is cleaned coal or muriate.
The present invention has adopted and has done wet combined techniques, on a production line according to the different CONTROL PROCESS conditions of product specification needs, the superfine calcined kaolin of production different varieties.The present invention combines the high production capacity production of the above fine powder dry grinding of 1250 orders and the less energy-consumption production of the following meal wet grinding of 1250 orders, has realized the less energy-consumption of adjustable, the technology of product granularity; Meal adds dispersion agent in the wet ultra-fine grinding process, intercalator, and whitening agent improves mill efficiency, shortens milling time, reduces the energy consumption in the process of lapping, improves the product whiteness of calcined kaolin; Product after the calcining adopts the wet grinding depolymerization again, solved the back firing technique calcining of traditional mill earlier reunite that the granularity that causes is returned slightly, calcined kaolin products viscosity increases, dispersed under the degradation unfavorable factor, separate while surface modification in the collecting process in wet method, improved the product surface processing efficiency, shortened production process, carry out modification in the modifying machine with traditional finished product is sent into and compare, modified effect obviously increases, and the modification cost obviously reduces.Method of the present invention has reduced production process, and product performance are improved, and added value of product gets a promotion, and Application Areas and product performance are widened.By changing processing condition can be produced different size on a production line calcined kaolin products, can adapt to different clients' demand.
Description of drawings:
Fig. 1 is the inventive method schema.
Embodiment:
The invention will be further described below by embodiment.
As shown in Figure 1, the present invention with kaolin raw ore dry grinding after, through gradation, the above fine powder of 1250 orders is directly broken up to handle after the calcining and is a kind of finished product A.The following meal of 1250 orders selects to add dispersion agent, intercalator, whitening agent as required, and to make water-content be that the slurry of 40%-60% carries out wet ultra-fine grinding; The grinding after drying is broken up, and advances calcined by rotary kiln; Kaolin after the calcining adds dispersion agent and surface-modifying agent, and to make water-content be that the slurry of 30%-60% carries out wet grinding, depolymerization again; Become another kind of finished product B after powder drying after the grinding modification is broken up, change processing condition, can obtain different products C of specification or D etc.
Embodiment one:
Selecting Wuhai area, Inner Mongol Coaseries kaolin for use is raw material.Described raw material is ground to form 600 purpose powderies, after particle is classified, become a kind of product after the above kaolin powder of 1250 orders directly advances calcined by rotary kiln, the kaolin powder below 1250 orders is subsequent treatment according to the following steps:
A. add dispersion agent, intercalator, whitening agent by weight ratio with kaolin powder:
Dispersion agent: Sodium hexametaphosphate 99, add-on are 2%;
Intercalator: urea and Ammoniom-Acetate were by weight 5: 1 mixed, and add-on is 2%;
Whitening agent: Repone K, add-on are 2%;
Be mixed with water-content and be 40% slurry;
B. ground 10 minutes;
C. slurry drying is broken up and is sent into calcining in the rotary kiln, and calcining temperature is 950-960 ℃, calcination time 60 minutes;
D. the kaolin after the calcining is sent into and is added water in the pulping device and stir that to make water-content be 30% slurry; Add dispersion agent sodium polyacrylate 1% simultaneously, surface-modifying agent titanate coupling agent 5%.
E. the slurry of steps d ground 100 minutes, and the slurry after levigate is sent into pneumatic dryer break up processing, product after the processing is another kind of calcined kaolin products, and product whiteness is 95.5%, and the product diameter of particle accounts for 97% of this product less than 2 microns granule content.
Embodiment two:
Selecting Wuhai area, Inner Mongol Coaseries kaolin for use is raw material.Described raw material is ground to form 6000 purpose powderies, after particle is classified, become a kind of product after the above kaolin powder of 1250 orders directly advances calcined by rotary kiln, the kaolin powder below 1250 orders is subsequent treatment according to the following steps:
A. add dispersion agent, intercalator, whitening agent by weight ratio with kaolin powder:
Sodium hexametaphosphate dispersant, add-on are 0.1%;
Intercalator urea and Ammoniom-Acetate were by weight 1: 5 mixed, and add-on is 0.1%;
Whitening agent: sodium-chlor, add-on are 0.1%;
Be mixed with water-content and be 60% slurry;
B. ground 150 minutes;
C. slurry drying is broken up and is sent into calcining in the rotary kiln, and calcining temperature is 950-960 ℃, calcination time 20 minutes;
D. the kaolin after the calcining is sent into and is added water in the pulping device and stir that to make water-content be 60% slurry; Add sodium hexametaphosphate dispersant 0.1% simultaneously, surface-modifying agent titanate coupling agent 0.1%;
E. the slurry of steps d ground 10 minutes, and the slurry after levigate is sent into pneumatic dryer break up processing, product after the processing is another kind of calcined kaolin products, and product whiteness is 93.5%, and the product diameter of particle accounts for 60% of this product less than 2 microns granule content.
Embodiment three:
Selecting Wuhai area, Inner Mongol Coaseries kaolin for use is raw material.Described raw material is ground to form 2000 purpose powderies, after particle is classified, become a kind of product after the above kaolin powder of 1250 orders directly advances calcined by rotary kiln, the kaolin powder below 1250 orders is subsequent treatment according to the following steps:
A. add by weight ratio with kaolin powder:
Dispersion agent sodium polyacrylate, add-on are 1%;
Be mixed with water-content and be 50% slurry;
B. ground 50 minutes;
C. slurry drying is broken up and is sent into calcining in the rotary kiln, and calcining temperature is 800 ℃, calcination time 80 minutes;
D. the kaolin after the calcining is sent into and is added water in the pulping device and stir that to make water-content be 40% slurry; Add dispersion agent sodium polyacrylate 0.8% simultaneously, surface-modifying agent silane 2%;
E. the slurry of steps d ground 40 minutes, and the slurry after levigate is sent into pneumatic dryer break up processing, product after the processing is another kind of calcined kaolin products, and product whiteness is 91.0%, and the product diameter of particle accounts for 20% of this product less than 2 microns granule content.
Embodiment four:
According to embodiment three, in step a, also add intercalator by weight ratio with kaolin powder, intercalator is that urea and Ammoniom-Acetate were with 2: 4 mixed, addition is 5%, other processing condition are constant, the product whiteness of gained e step is 91.0%, and product cut size accounts for 90% of this product less than 2 microns granule content.
Do contrast as seen with embodiment three, four, whether the interpolation of intercalator had direct influence to mill efficiency down to the particle diameter of final product when meal was carried out wet grinding.
Embodiment five:
Selecting Wuhai area, Inner Mongol Coaseries kaolin for use is raw material.Described raw material is ground to form 4000 purpose powderies, after particle is classified, become a kind of product after the above kaolin powder of 1250 orders directly advances calcined by rotary kiln, the kaolin powder below 1250 orders is subsequent treatment according to the following steps:
A, by adding dispersion agent, intercalator with the weight ratio of kaolin powder:
Sodium hexametaphosphate dispersant, add-on are 1.5%;
Intercalator urea and Ammoniom-Acetate were by weight 1: 3 mixed, and add-on is 10%;
Be mixed with water-content and be 55% slurry;
B, the slurry of step a was ground 100 minutes;
C, break up to send in the rotary kiln through the slurry drying that grinds and calcine, calcining temperature is 1000 ℃, and calcination time is 40 minutes;
D. the material after the calcining is cooled to normal temperature, sends into to add water in the pulping device and stir that to make water-content be 50% slurry; Add dispersion agent sodium polyacrylate 2% simultaneously, surface-modifying agent silicone oil 4%;
E. the slurry of steps d ground 60 minutes, and the slurry after levigate is sent into pneumatic dryer break up processing, product after the processing is another kind of calcined kaolin products, and product whiteness is 91.5%, and the product diameter of particle accounts for 80% of this product less than 2 microns granule content.
Embodiment six:
According to embodiment five, by with the weight ratio of kaolin powder, in step a, also add the whitening agent cleaned coal, addition is 1.5%, other processing condition are constant, and the product whiteness of gained e step is 95.2%, and product cut size accounts for 80% of this product less than 2 microns granule content.
Do contrast as seen with embodiment five, six, when meal is carried out wet grinding the interpolation of whitening agent whether the whiteness of product direct influence is arranged.Can add the whitening agent of different amounts according to client's needs.
Claims (8)
1, do the method that wet combined techniques prepares superfine calcined kaolin, it is characterized in that: with the Coaseries kaolin dry grinding is to carry out gradation behind the 600--6000 purpose powder;
Kaolin powder directly calcining in rotary kiln that 1250 orders are above obtains a kind of calcined kaolin products after breaing up processing;
The following kaolin powder of 1250 orders is handled by following processing step:
A. add the 0.1%-2% dispersion agent by the weight ratio with kaolin powder, being mixed with water content is the 40-60% slurry;
B. ground 10-150 minute;
C. slurry drying is broken up and is sent into 800-1000 ℃ of calcined by rotary kiln 20-80 minute;
D. the kaolin powder after the calcining is made the slurry that water content is 30%--60%; Add 0.1%-2% dispersion agent and 0.1%--5% surface-modifying agent by weight ratio simultaneously with kaolin powder;
E. the slurry of steps d was ground 10-100 minute, and be another kind of calcined kaolin products after the slurry drying after levigate broken up.
2, dried wet combined techniques according to claim 1 prepares the method for superfine calcined kaolin, and it is characterized in that: described dispersion agent is sodium polyacrylate or Sodium hexametaphosphate 99.
3, dried wet combined techniques according to claim 1 prepares the method for superfine calcined kaolin, and it is characterized in that: described surface-modifying agent is organosilane, silicone oil or titanate coupling agent.
4, dried wet combined techniques according to claim 1 prepares the method for superfine calcined kaolin, it is characterized in that: add the 0.1%--10% intercalator by the weight ratio with kaolin powder in step a.
5, according to claim 4ly do the method that wet combined techniques prepares superfine calcined kaolin, it is characterized in that: described intercalator be urea and Ammoniom-Acetate by 5: 1-1: 5 blended mixtures.
6, according to claim 1 to 5 one of described do the method that wet connection prepares superfine calcined kaolin, it is characterized in that: in step a, add the 0.1%--2% whitening agent by weight ratio with kaolin powder.
7, dried wet combined techniques according to claim 6 prepares the method for superfine calcined kaolin, and it is characterized in that: described whitening agent is cleaned coal or muriate.
8, according to claim 7ly do the method that wet combined techniques prepares superfine calcined kaolin, it is characterized in that: the whitening agent that adds 2% dispersion agent, 2% intercalator and 2% in step a is made the slurry of water content 40%; Ground 10 minutes among the step b; Slurry drying is broken up to send in the 950-960 ℃ of rotary kiln and was calcined 60 minutes among the step c; Make water-content in the steps d and be 30% slurry, add dispersion agent 1% simultaneously, surface-modifying agent 5%; Ground 100 minutes among the step e.
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| CN101792165A (en) * | 2010-03-16 | 2010-08-04 | 贵州明威环保技术有限公司 | Method for producing polymeric aluminum chloride from kaolin |
| CN101942079A (en) * | 2010-10-09 | 2011-01-12 | 中国地质大学（武汉） | Method for catalytically synthesizing polylactic acid by using calcined kaolin as catalyst |
| CN102060302A (en) * | 2010-10-29 | 2011-05-18 | 内蒙古天之娇高岭土有限责任公司 | Process for preparing superfine high-activity metakaolin by utilizing vertical high-pressure mill |
| CN102275941A (en) * | 2011-05-17 | 2011-12-14 | 陈文瑞 | Production method of kaolin clay for ceramic with high dry flexural strength |
| CN102602950A (en) * | 2012-03-14 | 2012-07-25 | 华南理工大学 | Method for preparing activated nano-kaolin |
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| CN103709794A (en) * | 2014-01-15 | 2014-04-09 | 郭凯 | Method for preparing modified calcined coal kaolin for rubber by employing solution method |
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| CN109626385A (en) * | 2018-12-25 | 2019-04-16 | 中国神华能源股份有限公司 | A method of nanoscale calcined kaolin powder is prepared using gangue |
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| CN101792165A (en) * | 2010-03-16 | 2010-08-04 | 贵州明威环保技术有限公司 | Method for producing polymeric aluminum chloride from kaolin |
| CN101792165B (en) * | 2010-03-16 | 2012-05-30 | 贵州明威环保技术有限公司 | Method for producing polymeric aluminum chloride from kaolin |
| CN101942079A (en) * | 2010-10-09 | 2011-01-12 | 中国地质大学（武汉） | Method for catalytically synthesizing polylactic acid by using calcined kaolin as catalyst |
| CN101942079B (en) * | 2010-10-09 | 2012-05-23 | 中国地质大学（武汉） | Method for catalytically synthesizing polylactic acid by using calcined kaolin as catalyst |
| CN102060302A (en) * | 2010-10-29 | 2011-05-18 | 内蒙古天之娇高岭土有限责任公司 | Process for preparing superfine high-activity metakaolin by utilizing vertical high-pressure mill |
| CN102275941A (en) * | 2011-05-17 | 2011-12-14 | 陈文瑞 | Production method of kaolin clay for ceramic with high dry flexural strength |
| CN102602950A (en) * | 2012-03-14 | 2012-07-25 | 华南理工大学 | Method for preparing activated nano-kaolin |
| CN103709794A (en) * | 2014-01-15 | 2014-04-09 | 郭凯 | Method for preparing modified calcined coal kaolin for rubber by employing solution method |
| CN103694747A (en) * | 2014-01-15 | 2014-04-02 | 郭凯 | Method for preparing modified calcined coal kaolin for rubber by ball milling process |
| CN105000570A (en) * | 2015-07-10 | 2015-10-28 | 山西金宇科林科技有限公司 | Production method for ultrafine low-conductivity calcined kaolin |
| CN105000570B (en) * | 2015-07-10 | 2017-09-05 | 山西金宇科林科技有限公司 | A kind of ultra-fine low conductivity burnt kaolin production process |
| CN109455734A (en) * | 2018-12-04 | 2019-03-12 | 湖南蒙源精细化工有限公司 | A kind of kaolin wet method processing technology |
| CN109626385A (en) * | 2018-12-25 | 2019-04-16 | 中国神华能源股份有限公司 | A method of nanoscale calcined kaolin powder is prepared using gangue |
| CN111320183A (en) * | 2020-03-26 | 2020-06-23 | 内蒙古大学 | Process for improving calcination whiteness of high-calcium kaolin |
| CN111362666A (en) * | 2020-03-26 | 2020-07-03 | 内蒙古大学 | Method for improving calcination whiteness of calcium kaolin by mechanochemical method |
| CN113736289A (en) * | 2021-10-10 | 2021-12-03 | 福建长泰万泰矿物制品有限公司 | Preparation method of modified silica powder, modified silica powder and application thereof |
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