CN1613818A - Production for superfine kaolin - Google Patents
Production for superfine kaolin Download PDFInfo
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- CN1613818A CN1613818A CN 200410052171 CN200410052171A CN1613818A CN 1613818 A CN1613818 A CN 1613818A CN 200410052171 CN200410052171 CN 200410052171 CN 200410052171 A CN200410052171 A CN 200410052171A CN 1613818 A CN1613818 A CN 1613818A
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- kaolin
- zirconium oxide
- accounts
- delaminating
- oxide bead
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Abstract
Production for superfine kaoline is carried out by tamping syrup, three-stage cyclone classifying, high-gradient magnetic separating, chemical bleaching, surface active treating, centrifugal dehydrating, pressing dehydrating, superfine grinding, and drying. Its advantages include stable quality, low cost and good surface performance of coating paper.
Description
Technical field
The present invention relates to a kind of kaolinic production method, particularly a kind ofly be applicable to that weathering deposition chiltern type, crystalline structure are the ultra-fine production method of flaky kaolin.
Background technology
Kaolin is one of coating paper industry requisite important source material, by coating, can produce have different performance, the various coating paper of different mass class, thereby satisfy the different demand of people.China's kaolin resource can be divided into three major types.Wherein a kind of is to be the chiltern type kaolin through the weathering sedimentary mineralization of representative with Maoming kaolin, and its crystalline structure mostly is sheet, and needle-like, tubular structure are also arranged.On working method, this mineral do not need to carry out Mechanical Crushing, as long as kaolin is separated just passable substantially from chiltern.
But aspect top grade coating papermaking, to the specification of quality of kaolin product than higher, as whiteness: more than 87%; Flaky crystalline structure; PH value: 5～7; Grade distributes :-5 μ m content 100% ,-2 μ m content 98% ,-1 μ m content is more than 90%, and median size is less than 0.5 μ m; Sticking concentration surpasses 70%; Moisture: less than 1.5%.In addition, also require to have good dispersion rheological property.
The key process technology of high-grade paint kaolin product production just is ultra-fine removal of impurities, brightens, three aspects of viscosity reduction (surface modification).In the prior art, brighten, the technology of viscosity reduction aspect is more, effect is also different in application, it is supporting still to fail fine and ultra-fine removal of impurities complete processing; Usually in the ultra-fine removal of impurities of kaolin, generally adopt hydrocyclone, spiral shell grading machine for sleeping in (natural subsidence of employing fractionated is also arranged) technology, its fineness does not reach the requirement of ultrafine kaolin.Up to standard as guaranteeing fineness, then to sub-elect the granularity part kaolin that exceeds standard, can cause a large amount of wastes of resource, uneconomical economically.Kaolinic super-fine processing method, the employing graft process that has promptly injects chemical agent between the sheet kaolinite layered crystal, it is expanded separate, thereby reach the superfine purpose.The employing high-speed grinder that also has grinds kaolin and carries out the superfine Technology, and any medium is not used in this grinding, directly by mechanical shear stress kaolinite is carried out ultra-fine processing.
Summary of the invention
The object of the present invention is to provide that a kind of technology is simple, cost is low and the production method of superfine kaolin of stable and reliable product quality, satisfy the needs of producing the high-grade paint product.
Purpose of the present invention can realize by following technical measures: it is that flaky kaolin is raw material that present method adopts crystalline structure, and procedure of processing is as follows:
(1), raw material is smash slurry, through the classification of three swirler device, mine tailing is thrown aside, the kaolin granularity that sorts out less than the content of 2mm more than 65%, the spiral shell classification of crouching again, underflow are made filler and are handled, and the kaolin granularity that sorts out is enriched to greater than 90% less than the content of 2mm;
(2), crouch ore pulp that the spiral shell classification comes out through high-gradient magnetic separation, throw aside iron-containing tailing, carry out chemical bleaching again, chemical bleaching operation control condition is: pulp density: 6～12%, sulfuric acid: 8～12 kilograms/ton, V-Brite B: 10～12 kilograms/ton, 1.2～1.5 kilograms/ton of alkaline agents, bleaching time: 10～20 minutes, through centrifuge dewatering (removing the sub-micro ion), plate-and-frame filter press dewater filter cake;
(3), filter cake is added dispersion agent and water smash with mechanical stirring that to change into solid content be 55～60% slurries, the add-on of dispersion agent is 0.3～0.6% of a filter cake weight, the pH value that adds alkaline agent adjusting slurries is 5.5～6.0, send the machine of delaminating to carry out ultra-fine mill, the machine of delaminating is grinding medium with the zirconium oxide bead, the weight proportion of zirconium oxide bead is: diameter is that 1.2～1.8mm zirconium oxide bead accounts for 50～60%, diameter is that the zirconium oxide bead of 0.7～1.2mm accounts for 40～50%, the grinding rotating speed is 700～800rpm, slurries stop milling time in the machine of delaminating be 5～10 minutes, through the kaolin granularity of ultra-fine mill less than the content of 2 μ m more than 98%, median size is 0.35～0.38 μ m.
(4), the slurries that step (3) is obtained carry out obtaining power-product after the spraying drying.
Above-mentioned dispersion agent is made up of Sodium hexametaphosphate 99, sodium polyacrylate, and its proportioning is: Sodium hexametaphosphate 99 accounts for 70～80%, and sodium polyacrylate accounts for 20～30%.
Above-mentioned alkaline agent is a sodium hydroxide.
Processing method of the present invention is reasonable in design, raw ore is earlier through smashing slurry, the classification of three swirler device, spiral shell classification for sleeping in, high-gradient magnetic separation, chemical bleaching, surface activation process, centrifuge dehydration, behind the filter-press dehydration, the grinding of delaminating again, utilize cleavage growth and the more weak characteristics of bonding force thereof between kaolin tabular crystal knot sheet and the sheet, the shearing force that rubs mutually and produce by the high-shear medium, the kaolin tabular crystal is further dissociated, broken, thereby reach the superfine purpose, also can reduce the viscosity of kaolin product simultaneously, the high-grade paint kaolin product steady quality of producing, near the fineness of nanometer materials, whiteness, quality index such as sticking concentration reach the requirement of high-grade coating papermaking, can obviously improve the surface property of coating paper, improve the quality of paper, reduce production costs.
Embodiment
Adopting the geographic chiltern type in Maoming, crystalline structure is that flaky kaolin is raw material, and the quality index of the MM01 of production our company product is as follows:
| Index | Whiteness | Sticking concentration | PH value | 325 mesh sieve surpluses | Moisture |
| Greater than 87.0% | ??71.5％ | ???6.5 | ???0.0012％ | ???1.12％ | |
| Grade distributes | ????-1μm | ??-2μm | ??-5μm | ????-8μm | Median size |
| ????90.7％ | ??98.9％ | ??100％ | ????100％ | ??0.38μm |
Embodiment one:
1, raw material adopts 1500 high weir spiral classifiers after smashing slurry, removes 2mm with the top coarse sand, and the kaolin granularity is enriched to 90～92% less than the content of 2mm; The hydrocyclone that adopts secondary 250 carbofrax materials to make is removed less than 2mm parts of fine quartz sand, obtains concentration and be 10～13%, sediment concentration is less than 5% ore pulp.Wherein swirler first step operating pressure is 1.5kg
2/ cm
2, flow 40m
3/ n/ platform; Secondary work pressure is 1.8～2.0kg/cm
2, flow 40m
3/ n/ platform.Raw material after above-mentioned art breading, add Sodium hexametaphosphate 99 and smash slurry, use three swirler device (first step φ 250, secondary φ 75, three grades of φ 25), the spiral shell grading machine that crouches to carry out classification then, can obtain concentration and be 6～12% less than 2 μ m content greater than 90% ore pulp, wherein first step swirler operating pressure is 1.8～2.0kg/cm
2, secondary is 2.5～3.0kg/cm
2, three grades is 3.5～4.0kg/cm
2Spiral shell grading machine rotating speed 2160ppm for sleeping in, separation factor 3200, flow 45m
3/ n/ platform;
2, ore pulp is carried out chemical bleaching, pulp density control 6～12%, by ore pulp weight adding sulfuric acid: 1.9 kilograms/ton, 11 kilograms/ton of V-Brite Bs, 1.2 kilograms/ton of alkaline agents, bleached 20 minutes, through whizzer, plate-and-frame filter press dewater filter cake;
3, by the weight of filter cake, add 0.4% dispersion agent, adding water then smashes filter cake and stirs into slurries, dispersion agent is made up of 75% Sodium hexametaphosphate 99 and 25% sodium polyacrylate, the solid content of slurries is 57～60%, and the pH value that hydro-oxidation sodium is regulated slurries is 5.9, send the machine of delaminating to carry out ultra-fine mill, the machine of delaminating adopts the vertical machine of delaminating of BP-500 type, and working parameter is: power: 150KW, rotating speed: 750rpm, flow: 10m
3/ h, the zirconium oxide bead weight proportion that adopts is: diameter is that 1.2～1.8mm zirconium oxide bead accounts for 60%, diameter is that the zirconium oxide bead of 0.7～1.2mm accounts for 40%, slurries stop milling time in the machine of delaminating be 6 minutes, by the spray-dried product that gets of slurry that the machine of delaminating comes out, quality product reaches standard-required.
This product is tested detected result through China National Pulp ﹠ Paper Research Institute:
| Index | The ISO whiteness | Sticking concentration | PH value | 325 mesh sieve surpluses | Moisture |
| ????87.4％ | ????71.65％ | ????6.27 | ????0.004％ | ???1.27％ | |
| Grade distributes | ????-1μm | ????-2μm | ????-5μm | ????-8μm | Median size |
| ????92.3％ | ????99.0％ | ????100％ | ????100％ | ??0.37μm |
This product is through the chemical analysis results at Guangzhou Inst. of Chemistry, Chinese Academy of Sciences test analysis center:
| Analysis project | Analytical results (%) | Analysis project | Analytical results (%) |
| ????SlO 2 | ????46.08 | ????NaO | ?????0.15 |
| ????Al 2O 3 | ????37.90 | ????CaO | ?????0.13 |
| ????Fe 2O 3 | ????0.52 | ????MgO | ?????0.50 |
| ????TiO | ????0.30 | Loss on ignition | ?????13.93 |
| ????KO | ????0.32 |
Embodiment two:
Working method is identical with embodiment one, raw ore is earlier through smashing slurry, the classification of three swirler device, spiral shell classification for sleeping in, high-gradient magnetic separation magneticstrength: 2.0 teslas, distinguishing period: 15 minutes/time, the pulp density control 8～10% of chemical bleaching, by ore pulp weight adding sulfuric acid: 11 kilograms/ton, 6.2 kilograms/ton of V-Brite Bs, 1.5 kilograms/ton of alkaline agents, bleached 30 minutes, through whizzer and plate-and-frame filter press dewater filter cake; Filter cake is added 0.6% dispersion agent and water stirs into slurries with smashing, the solid content of slurries is 55～57%, dispersion agent is made up of 80% Sodium hexametaphosphate 99 and 20% sodium polyacrylate, the pH value that hydro-oxidation sodium is regulated slurries is 5.5, send the machine of delaminating to carry out ultra-fine mill, the zirconium oxide bead weight proportion that the machine of delaminating adopts is: diameter is that 1.2～1.8mm zirconium oxide bead accounts for 50%, diameter is that the zirconium oxide bead of 0.7～1.2mm accounts for 50%, grind the spray-dried product that gets of the slurry that ejected in 8 minutes, quality product reaches standard-required.
Claims (3)
1, a kind of production method of superfine kaolin, raw material is that crystalline structure is flaky kaolin, through smashing slurry, the classification of three swirler device, spiral shell classification for sleeping in, high-gradient magnetic separation, chemical bleaching, surface activation process, centrifuge dehydration, filter-press dehydration, grinding, drying, it is characterized in that earlier:
(1), chemical bleaching operation control condition is: pulp density: 6～12%, sulfuric acid: 8～12 kilograms/ton, V-Brite B: 10～12 kilograms/ton, 1.2～1.5 kilograms/ton of alkaline agents, bleaching time: 10～20 minutes.
(2), filter cake is added dispersion agent and water and smash with mechanical stirring that to change into solid content be 55～60% slurries, the add-on of dispersion agent is 0.3～0.6% of a filter cake weight, the pH value that adds alkaline agent adjusting slurries is 5.5～6.0, send the machine of delaminating to carry out ultra-fine mill, the machine of delaminating is grinding medium with the zirconium oxide bead, the weight proportion of zirconium oxide bead is: diameter is that 1.2～1.8mm zirconium oxide bead accounts for 50～60%, diameter is that the zirconium oxide bead of 0.7～1.2mm accounts for 40～50%, the grinding rotating speed is 700～800rpm, and slurries stop milling time in the machine of delaminating be 5～10 minutes.
2, according to right 1 described production method, it is characterized in that dispersion agent is made up of Sodium hexametaphosphate 99, sodium polyacrylate, its proportioning is: Sodium hexametaphosphate 99 accounts for 70～80%, and sodium polyacrylate accounts for 20～30%.
3,, it is characterized in that alkaline agent is a sodium hydroxide according to right 1 described production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410052171 CN1613818A (en) | 2004-11-09 | 2004-11-09 | Production for superfine kaolin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410052171 CN1613818A (en) | 2004-11-09 | 2004-11-09 | Production for superfine kaolin |
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|---|---|
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2036958A3 (en) * | 2007-08-24 | 2009-12-30 | China University of Geosciences (Wu Han ) | Process for producing kaolin product for paper coating |
| CN101445249B (en) * | 2008-12-28 | 2010-09-01 | 梁明 | Method for bleaching high-concentration kaolin pulp |
| CN101863487A (en) * | 2010-05-28 | 2010-10-20 | 茂名石化矿业有限公司 | Production method of superfine kaolin |
| CN101863488A (en) * | 2010-05-28 | 2010-10-20 | 茂名石化矿业有限公司 | State division of superfine kaolin |
| CN101987480A (en) * | 2009-07-31 | 2011-03-23 | 施永义 | Preparation method of non-pickling raw kaolin ore |
| CN103145400A (en) * | 2013-02-27 | 2013-06-12 | 中国高岭土有限公司 | Preparation method of kaolin for high-performance honeycomb ceramic |
| CN103666008A (en) * | 2013-09-27 | 2014-03-26 | 郴州四方立投资有限公司 | Preparation method of superfine high-activity kaolin for paint |
| CN104528747A (en) * | 2015-01-07 | 2015-04-22 | 西双版纳万祥矿业有限责任公司 | Method for improving recycling rate and whiteness of kaolin tailings |
| CN105271278A (en) * | 2015-11-25 | 2016-01-27 | 中国高岭土有限公司 | Method for removing titanium in grittiness kaolin |
| CN106946265A (en) * | 2017-03-09 | 2017-07-14 | 兖矿北海高岭土有限公司 | A kind of kaolinic mill stripping method of Weathering-residual Type |
| CN107758677A (en) * | 2017-11-22 | 2018-03-06 | 龙岩高岭土有限公司 | A kind of FCC catalyst kleit preparation method |
| CN107774437A (en) * | 2017-11-16 | 2018-03-09 | 武汉理工大学 | A kind of removing iron by kaolin titanium ore-dressing technique |
| CN108249885A (en) * | 2018-02-01 | 2018-07-06 | 厦门欣意盛非金属材料科技有限公司 | A kind of preparation method of modified kaolin |
| CN108745623A (en) * | 2018-05-28 | 2018-11-06 | 湖南兴辉洗选药剂科技开发有限公司 | A kind of coke rich coal slime separation system and method for separating |
| CN110304898A (en) * | 2019-08-13 | 2019-10-08 | 龙岩高岭土股份有限公司 | A method of tailing, which is scanned, with kaolin prepares medium-to-high grade kaolin clay for ceramic |
| CN111744659A (en) * | 2020-06-30 | 2020-10-09 | 茂名市茂群高岭土有限公司 | Method for controlling particle size in kaolin production process |
| CN113861726A (en) * | 2021-09-29 | 2021-12-31 | 广东宝丰陶瓷科技发展股份有限公司 | Preparation method for low-grade kaolin composite efficient activation modification |
-
2004
- 2004-11-09 CN CN 200410052171 patent/CN1613818A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2036958A3 (en) * | 2007-08-24 | 2009-12-30 | China University of Geosciences (Wu Han ) | Process for producing kaolin product for paper coating |
| CN101445249B (en) * | 2008-12-28 | 2010-09-01 | 梁明 | Method for bleaching high-concentration kaolin pulp |
| CN101987480A (en) * | 2009-07-31 | 2011-03-23 | 施永义 | Preparation method of non-pickling raw kaolin ore |
| CN101863487A (en) * | 2010-05-28 | 2010-10-20 | 茂名石化矿业有限公司 | Production method of superfine kaolin |
| CN101863488A (en) * | 2010-05-28 | 2010-10-20 | 茂名石化矿业有限公司 | State division of superfine kaolin |
| CN103145400A (en) * | 2013-02-27 | 2013-06-12 | 中国高岭土有限公司 | Preparation method of kaolin for high-performance honeycomb ceramic |
| CN103666008A (en) * | 2013-09-27 | 2014-03-26 | 郴州四方立投资有限公司 | Preparation method of superfine high-activity kaolin for paint |
| CN104528747A (en) * | 2015-01-07 | 2015-04-22 | 西双版纳万祥矿业有限责任公司 | Method for improving recycling rate and whiteness of kaolin tailings |
| CN105271278A (en) * | 2015-11-25 | 2016-01-27 | 中国高岭土有限公司 | Method for removing titanium in grittiness kaolin |
| CN106946265A (en) * | 2017-03-09 | 2017-07-14 | 兖矿北海高岭土有限公司 | A kind of kaolinic mill stripping method of Weathering-residual Type |
| CN107774437A (en) * | 2017-11-16 | 2018-03-09 | 武汉理工大学 | A kind of removing iron by kaolin titanium ore-dressing technique |
| CN107774437B (en) * | 2017-11-16 | 2019-11-26 | 武汉理工大学 | A kind of removing iron by kaolin titanium ore-dressing technique |
| CN107758677A (en) * | 2017-11-22 | 2018-03-06 | 龙岩高岭土有限公司 | A kind of FCC catalyst kleit preparation method |
| CN108249885A (en) * | 2018-02-01 | 2018-07-06 | 厦门欣意盛非金属材料科技有限公司 | A kind of preparation method of modified kaolin |
| CN108745623A (en) * | 2018-05-28 | 2018-11-06 | 湖南兴辉洗选药剂科技开发有限公司 | A kind of coke rich coal slime separation system and method for separating |
| CN108745623B (en) * | 2018-05-28 | 2020-07-17 | 湖南兴辉洗选药剂科技开发有限公司 | System and method for sorting coke-fat coal slime |
| CN110304898A (en) * | 2019-08-13 | 2019-10-08 | 龙岩高岭土股份有限公司 | A method of tailing, which is scanned, with kaolin prepares medium-to-high grade kaolin clay for ceramic |
| CN111744659A (en) * | 2020-06-30 | 2020-10-09 | 茂名市茂群高岭土有限公司 | Method for controlling particle size in kaolin production process |
| CN113861726A (en) * | 2021-09-29 | 2021-12-31 | 广东宝丰陶瓷科技发展股份有限公司 | Preparation method for low-grade kaolin composite efficient activation modification |
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