CN104556078B - A kind of calcined kaolin production method with high covering power - Google Patents
A kind of calcined kaolin production method with high covering power Download PDFInfo
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- CN104556078B CN104556078B CN201510004159.5A CN201510004159A CN104556078B CN 104556078 B CN104556078 B CN 104556078B CN 201510004159 A CN201510004159 A CN 201510004159A CN 104556078 B CN104556078 B CN 104556078B
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Abstract
A kind of calcined kaolin production method with high covering power of the present invention, belongs to calcined kaolin technical field；There is provided that a kind of high whiteness, particle diameter be ultra-fine, centralized particle diameter, and there is the calcined kaolin production method that oil absorption is high, covering power is high；A kind of calcined kaolin production method with high covering power, by gangue or Raolinite after dispensing, coarse crushing, pulverizing, slurrying, sleeping spiral shell, video disc, filter pressing, spray drying, the spraying material just reunited pulverizes reduction, carrying out decarburization through calcining to brighten, take off water of crystallization and form gap structure, the reunion eventually passing depolymerization calcining material obtains finished product；Present invention is mainly applied to Kaolin aspect.
Description
Technical field
A kind of calcined kaolin production method with high covering power of the present invention, belongs to calcined kaolin technical field.
Background technology
In coatings industry, conventional Chinese white titanium dioxide price is high, in process of manufacture, environment is produced bigger chemical contamination.Generally the Chinese whites such as titanium dioxide are replaced to use with the natural minerals Kaolin of stable chemical nature, it is possible to decrease cost.In coatings industry, Kaolin application has the longest history, but due to factors such as its covering power are relatively low, limits its addition in water paint.Therefore, it is necessary to it is improved.
Summary of the invention
In order to overcome the deficiencies in the prior art, it is provided that a kind of high whiteness, particle diameter are ultra-fine, centralized particle diameter, and there is the calcined kaolin production method that oil absorption is high, covering power is high.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
A kind of calcined kaolin production method with high covering power, by gangue or Raolinite after dispensing, coarse crushing, pulverizing, slurrying, sleeping spiral shell, video disc, filter pressing, spray drying, the spraying material reunited is pulverized reduction by the reunion of its depolymerization spraying material, be then passed through calcining carry out decarburization brighten, de-water of crystallization and form gap structure, finally calcining caking powder body obtains finished product after depolymerization is broken up.
After described dispensing, the loss on ignition of raw ore is at 15.8%-17.0%, Al2O3Content 35.0%-39.0%, SiO2Content 42.0%-46.0%.
The described dispersant adding raw material weight≤0.5% in pulping stage.
Described dispersant is one or more in sodium hexameta phosphate, sodium polyacrylate, ammonium polyacrylate.
Overflow mud 325 screen residue≤0.005% of described sleeping spiral shell；Overflow mud granularity (-2 μm, %) >=93.0%.
325 mesh standard sieve residue on sieve≤0.005% after the described spraying material pulverizing reduction that will reunite, dispersibility≤55 μm.
Described calcining heat is 950-1100 DEG C, kiln rotating speed 43-47r/min, First air frequency 23-25HZ, secondary wind frequency 23-25.
325 mesh standard sieve residue on sieve≤0.005% after the reunion of described depolymerization calcining material, dispersibility≤55 μm.
The present invention is compared with prior art had the beneficial effect that
The present invention, by loss on ignition in dispensing regulation raw ore etc., is rejected the bulky grain not being fully ground in process of lapping, reduces fine grain overground phenomenon, make it preserve the six square piece formula shape structures that Raolinite is complete as far as possible by sleeping spiral shell centrifugal classification；Overground fine grained is rejected by video disc machine；By regulation and control calcining heat, kiln rotating speed and the means such as First air frequency, secondary wind frequency in calcination process, control the degree of calcination of product；By controlling residue on sieve and the dispersibility of product after calcining, finally give the calcined kaolin products of high covering power.
The present invention can use in solvent-borne type and water paint, there is the features such as good dispersion, suspension be good, the bin stability of coating can be improved, there is the advantages such as whiteness height, oil absorption height, ultra-fine, the centralized particle diameter of particle diameter, it is the extension agent that titanium dioxide is good, and can partly substitute titanium dioxide.
Detailed description of the invention
Below by embodiment, the present invention is described in further detail.
A kind of calcined kaolin production method with high covering power, follows the steps below:
By block gangue or Raolinite after the miscellaneous stone of hand picking, the loss on ignition of raw ore is controlled 16.5% ± 0.25%, Al2O3Content 35.0%-39.0%, SiO2Content 42.0%-46.0%；Through being broken for the material of particle diameter≤30mm；It is crushed to by 325 mesh rates 90% through flour mill；Adding the dispersant of raw material weight≤0.5% in pulping process, described dispersant is one or more in sodium hexameta phosphate, sodium polyacrylate, ammonium polyacrylate；Material after wet grinding, through sleeping spiral shell centrifugal classification, rejects the bulky grain not being fully ground, and improves mud granularity, overflow mud 325 screen residue≤0.005% after classification, overflow mud granularity (-2 μm, %) >=93.0%；Reject overground fine grained by video disc machine, improve overflow solid content, shorten the filter pressing cycle；Filter pressing is dehydrated, it is ensured that pulping solid content is at 49%-55%, it is ensured that after cake discharge, filter cloth is clean and intact, it is to avoid spillage；It is spray-dried, makes spraying material moisture 2%-4%, spray sheet to change in turn the minor cycle, must not unify to change after all wearing and tearing；By 325 mesh standard sieve residue on sieve≤0.005% after the spraying material reunited is pulverized reduction of reuniting of its depolymerization spraying material, dispersibility≤55 μm；Be then passed through calcining carry out decarburization brighten, de-water of crystallization and form gap structure, calcining heat 950-1100 DEG C, kiln rotating speed is 43-47r/min, First air frequency 23-25HZ, secondary wind frequency 23-25HZ, beater ginseng wind 2.5-4cm, beater pipe negative pressure 2000-3500Pa；Finally carry out the reunion of depolymerization calcining material, 325 mesh standard sieve residue on sieve≤0.005% after depolymerization, dispersibility≤55 μm；Use this technique products obtained therefrom covering power can improve 4 percentage points.
Claims (4)
1. a calcined kaolin production method with high covering power, it is characterized in that: by gangue or Raolinite after dispensing, coarse crushing, pulverizing, slurrying, sleeping spiral shell, video disc, filter pressing, spray drying, the spraying material reunited is pulverized the reduction reunion with depolymerization spraying material, be then passed through calcining carry out decarburization brighten, de-water of crystallization and form gap structure, finally calcining caking powder body obtains finished product after depolymerization is broken up, overflow mud 325 screen residue≤0.005% of described sleeping spiral shell；Overflow mud granularity (-2 μm, %) >=93.0%, 325 mesh standard sieve residue on sieve≤0.005% after the described spraying material pulverizing reduction that will reunite, dispersibility≤55 μm, described calcining heat is 950-1100 DEG C, kiln rotating speed 43-47r/min, First air frequency 23-25Hz, secondary wind frequency 23-25 Hz, 325 mesh standard sieve residue on sieve≤0.005% of the finished product that calcining caking powder body obtains after depolymerization is broken up, dispersibility≤55 μm.
A kind of calcined kaolin production method with high covering power the most according to claim 1, it is characterised in that: after described dispensing, the loss on ignition of raw ore is at 15.8%-17.0%, Al2O3Content 35.0%-39.0%, SiO2Content 42.0%-46.0%.
A kind of calcined kaolin production method with high covering power the most according to claim 1, it is characterised in that: in pulping stage, add the dispersant of raw material weight≤0.5%.
A kind of calcined kaolin production method with high covering power the most according to claim 3, it is characterised in that: described dispersant is one or more in sodium hexameta phosphate, sodium polyacrylate, ammonium polyacrylate.
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| CN104556078A CN104556078A (en) | 2015-04-29 |
| CN104556078B true CN104556078B (en) | 2016-09-28 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105540599B (en) * | 2015-12-22 | 2018-03-09 | 山西晋坤矿产品股份有限公司 | A kind of method that efficient calcining of gangue oxygenation prepares high grade kaolinite |
| CN105642433B (en) * | 2016-04-13 | 2017-12-19 | 中国矿业大学 | A kind of Coaseries kaolin decarbonization process |
| CN106395839B (en) * | 2016-08-31 | 2019-03-05 | 山西晋坤矿产品股份有限公司 | A kind of technique preparing electrophoretic paint calcined kaolin with gangue |
| CN106395840B (en) * | 2016-08-31 | 2019-03-26 | 山西晋坤矿产品股份有限公司 | It is a kind of to prepare the high technique for covering performance calcined kaolin with gangue |
| CN107021501B (en) * | 2017-05-04 | 2019-05-03 | 山西晋坤矿产品股份有限公司 | A kind of method of gangue preparation high oil absorption value calcined kaolin |
| CN107724175A (en) * | 2017-09-13 | 2018-02-23 | 山西金宇科林科技有限公司 | A kind of heat-sensitive paper burnt kaolin production process |
| CN108275688B (en) * | 2018-02-08 | 2021-05-25 | 山西恒源高岭土有限公司 | Preparation method of kaolin with high oil absorption |
| CN110577225B (en) * | 2019-09-23 | 2022-07-08 | 山西金宇科林科技有限公司 | Preparation method of high-whiteness calcined kaolin with ultrahigh oil absorption |
| CN111170327B (en) * | 2020-01-16 | 2022-04-05 | 内蒙古超牌新材料股份有限公司 | Preparation method, production equipment and application of PVC (polyvinyl chloride) insulating calcined kaolin |
| CN111204773A (en) * | 2020-03-05 | 2020-05-29 | 西安煤科动力科技有限公司 | Preparation method of kaolin |
| 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 |
| CN112516984A (en) * | 2020-12-23 | 2021-03-19 | 山西晋坤矿产品股份有限公司 | Method for preparing high-activity petroleum catalytic cracking catalyst by utilizing coal gangue |
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| CN102491355A (en) * | 2011-11-25 | 2012-06-13 | 厦门大学 | Method for preparing superthin high-whiteness calcined kaolin |
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| CN102491355A (en) * | 2011-11-25 | 2012-06-13 | 厦门大学 | Method for preparing superthin high-whiteness calcined kaolin |
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