CN101244827B - Method for preparing superfine calcined kaolin by dry-wet combination method - Google Patents
Method for preparing superfine calcined kaolin by dry-wet combination method Download PDFInfo
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- CN101244827B CN101244827B CN2008100871971A CN200810087197A CN101244827B CN 101244827 B CN101244827 B CN 101244827B CN 2008100871971 A CN2008100871971 A CN 2008100871971A CN 200810087197 A CN200810087197 A CN 200810087197A CN 101244827 B CN101244827 B CN 101244827B
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- 239000005995 Aluminium silicate Substances 0.000 title claims abstract description 77
- 235000012211 aluminium silicate Nutrition 0.000 title claims abstract description 77
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 51
- 239000000843 powder Substances 0.000 claims abstract description 38
- 238000001354 calcination Methods 0.000 claims abstract description 32
- 239000000138 intercalating agent Substances 0.000 claims abstract description 18
- 230000002087 whitening effect Effects 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims description 37
- 239000006185 dispersion Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 6
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 6
- 238000009837 dry grinding Methods 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000007822 coupling agent Substances 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 150000001282 organosilanes Chemical group 0.000 claims description 2
- 238000000227 grinding Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000002245 particle Substances 0.000 abstract description 11
- 238000001238 wet grinding Methods 0.000 abstract description 9
- 239000002270 dispersing agent Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000004048 modification Effects 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract 1
- 239000003607 modifier Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 56
- 239000002994 raw material Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 239000008187 granular material Substances 0.000 description 6
- 235000012054 meals Nutrition 0.000 description 5
- 238000004537 pulping Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a method for preparing superfine calcined kaolin by a dry-wet combined method, which comprises the steps of grinding raw kaolin ores by a dry method, grading particles, and directly calcining fine powder of more than 1250 meshes to obtain a finished product. The coarse powder with the particle size of less than 1250 meshes is added with a dispersing agent, an intercalating agent and a whitening agent during wet grinding, so that the grinding efficiency is improved, the grinding time is shortened, the energy consumption in the grinding process is reduced, and the mixing effect of the whitening agent and the kaolin is improved. Grinding, drying and breaking up, calcining in a rotary kiln, carrying out wet grinding on the calcined kaolin, simultaneously adding a dispersing agent and a surface modifier, synchronously combining superfine grinding and modification of the product, and drying and breaking up the ground and modified powder to obtain another finished product. The invention can produce the superfine calcined kaolin with different specifications on one production line by controlling the process conditions, reduces the production procedures, improves the added value of the product, widens the application field and the product performance, and can adapt to the requirements of different customers.
Description
Technical field:
The present invention relates to kaolinic working 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 just can obtain using after must passing through further processing.The working 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, and " burn afterwards earlier and grind " technology 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 on a production line, produce the working method of different size calcined kaolin products according to different needs.
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 process 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; Powder after the grinding modification becomes another kind of finished product after drying is broken up.Concrete process 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;
Kaolin powder below 1250 orders is handled by following process step:
A. add the 0.1%-2% dispersion agent by the weight ratio with kaolin powder, being mixed with water cut 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 processed the slurry that water cut 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 ZX-I 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 a 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 and reunited that the granularity that causes is returned slightly, calcined kaolin products viscosity increases, dispersed degradation unfavorable factor down, separated while surface-treated in the collecting process, improved the product surface processing efficiency in wet method; 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.Through 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:
Through embodiment the present invention is described further below.
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.Meal below 1250 orders selects to add dispersion agent, intercalator, whitening agent as required, and to process 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 process water-content be that the slurry of 30%-60% carries out wet grinding, depolymerization again; Powder after the grinding modification becomes another kind of finished product B after drying is broken up, change processing condition, can obtain specification Different products C or D etc.
Embodiment one:
Selecting Wuhai area, Inner Mongol Coaseries kaolin for use is raw material.Said 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 process water-content be 30% slurry; Add dispersion agent ZX-I 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.Said 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 process 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.Said 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 ZX-I, 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 process water-content be 40% slurry; Add dispersion agent ZX-I 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; Weight ratio by with kaolin powder also adds intercalator in step a; Intercalator be urea and Ammoniom-Acetate 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.
It is visible to do contrast with embodiment three, four, when meal is carried out wet grinding the interpolation of intercalator whether to mill efficiency so that the particle diameter of final product has direct influence.
Embodiment five:
Selecting Wuhai area, Inner Mongol Coaseries kaolin for use is raw material.Said 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;
The slurry drying that c, warp grind is broken up and is sent into calcining in the rotary kiln, and 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 process water-content be 50% slurry; Add dispersion agent ZX-I 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.
It is visible to do contrast 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;
Kaolin powder below 1250 orders is handled by following process step:
A. add the 0.1%-2% dispersion agent by the weight ratio with kaolin powder, being mixed with water cut 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 processed the slurry that water cut 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: said dispersion agent is ZX-I 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: said 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, and it is characterized in that: the weight ratio by with kaolin powder adds the 0.1%--10% intercalator in step a.
5. according to claim 4ly do the method that wet combined techniques prepares superfine calcined kaolin, it is characterized in that: said intercalator be urea and Ammoniom-Acetate by 5: 1-1: 5 blended mixtures.
According to claim 1 to 5 one of said do the method that wet connection prepares superfine calcined kaolin, it is characterized in that: the weight ratio by with kaolin powder adds the 0.1%--2% whitening agent in step a.
7. dried wet combined techniques according to claim 6 prepares the method for superfine calcined kaolin, and it is characterized in that: said whitening agent is a 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 in step a, adds 2% dispersion agent, 2% intercalator and 2% is processed the slurry of water cut 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; Process 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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| CN101244827B true CN101244827B (en) | 2012-04-04 |
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Cited By (1)
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| CN108676386A (en) * | 2018-05-04 | 2018-10-19 | 内蒙古超牌建材科技有限公司 | Low viscosity calcined kaolin, low viscosity calcined kaolin slurry and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108676386A (en) * | 2018-05-04 | 2018-10-19 | 内蒙古超牌建材科技有限公司 | Low viscosity calcined kaolin, low viscosity calcined kaolin slurry and preparation method thereof |
| CN108676386B (en) * | 2018-05-04 | 2020-11-10 | 内蒙古超牌建材科技有限公司 | Low-viscosity calcined kaolin, low-viscosity calcined kaolin slurry and preparation method thereof |
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Addressee: Patent director of Inner Mongolia Mengxi kaolin powder Co.,Ltd. Document name: Notice of approval of right to request |