CN102976348B - Preparation method of kaolin having high colloid index - Google Patents
Preparation method of kaolin having high colloid index Download PDFInfo
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- CN102976348B CN102976348B CN201210546755.2A CN201210546755A CN102976348B CN 102976348 B CN102976348 B CN 102976348B CN 201210546755 A CN201210546755 A CN 201210546755A CN 102976348 B CN102976348 B CN 102976348B
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- ammoniacal liquor
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Abstract
The invention relates to the technical field of kaolin preparation, and particularly relates to a preparation method of kaolin having a high colloid index. The preparation method comprises the following steps: (1) pulping, and dispersing; (2) desanding; (3) blanching; (4) modifying with ammonia water: adding ammonia water of which the concentration is 10-29% in percentage by mass into the ore pulp concentrated material, and then thoroughly stirring for 15-25 minutes, wherein 0.1-0.35 kg of ammonia water is added into per ton of ore pulp concentrated material; and (5) washing and drying: circularly washing and dewatering the ore pulp concentrated material subjected to ammonia water modification in the step (4), and drying the washed and dewatered ore pulp concentrated material to obtain the kaolin having a high colloid index. According to the invention, the ammonia water is added into the ore pulp concentrated material to perform modification treatment, so that the hydrophilicity, dispersity and expandability of kaolin can be changed, thereby ensuring that the colloid index of the finally prepared kaolin is higher than 90ml/15g. Thus, the prepared kaolin is especially suitable for being used as a catalyst for catalytic cracking reaction in the petrochemical industry.
Description
Technical field
The present invention relates to kaolin preparing technical field, particularly relate to a kind of high colloid index kleit preparation method.
Background technology
In recent years, kaolin becomes tens necessary raw mineral materialss of industry such as papermaking, pottery, rubber, chemical industry, coating, medicine and national defence gradually.Conventionally the pure kaolin of matter have that whiteness is high, matter is soft, easy dispersion suspension in water, good plasticity-, high cohesiveness and good electrical insulation capability, and there is good antiacid dissolubility, very low cation exchange capacity, the physico-chemical property such as resistivity against fire preferably.Kaolin is also widespread use in modern petroleum chemical industry, especially as the catalyzer of catalytic cracking reaction.
Kaolinic colloid index refers to after kaolin and water are mixed in proportion and adds magnesium oxide, and the volume that kaolin is condensed into gelinite is called colloid index, and its unit is (ml/15) gram soil.Colloid index shows the degree of sample particle dispersion and the degree of aquation, is dispersiveness, wetting ability and expansile general performance.At present, common kaolinic colloid index is lower than 85ml/15g soil, and require during petroleum chemical industry catalytic cracking kaolinic colloid index as catalyzer higher than 90ml/15g soil, when existing common kaolin is difficult to meet petroleum chemical industry catalytic cracking to kaolinic high colloid index requirement.
Summary of the invention
The object of the invention is to avoid weak point of the prior art and a kind of high colloid index kleit preparation method that can improve kaolin colloid index is provided.
Object of the present invention is achieved through the following technical solutions.
A high colloid index kleit preparation method, comprises the following steps,
(1) slurrying disperses: kaolin is dissolved in water to dispersion, make base-material;
(2) desanding impurity elimination: base-material is carried out to desanding and remove coarse grain impurity, make ore pulp primary material;
(3) bleaching: ore pulp primary material is carried out to bleaching, make ore pulp fine fodder;
(4) ammoniacal liquor modification: adding mass percentage concentration in ore pulp fine fodder is 10 ~ 29% ammoniacal liquor, more fully stirs 15 ~ 25min, and ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.1 ~ 0.35kg ammoniacal liquor;
(5) washing is dry: the ore pulp fine fodder through step (4) ammoniacal liquor modification is carried out to circulation cleaning dehydration, and the ore pulp fine fodder after washing dehydration is dried, make high colloid index kaolin.
Wherein, also comprise iron removal by magnetic separation step, iron removal by magnetic separation step is located between step (2) and step (3), and iron removal by magnetic separation step is for being used magnet to draw the iron mineral of removing ore pulp primary material.
Preferably, in above-mentioned steps (1), kaolin adds dispersion agent after dissolving in water and disperseing again, makes base-material, strengthen the dispersiveness of kaolin in water, improve gloss, improve tinting strength and opacifying power, improve color developing and toning property, prevent floating, prevent flocculation, settlement prevention.
Wherein, dispersion agent is a kind of or two or more in six inclined to one side sodium sulfate, trisodium phosphate and organic polypropylene.
Preferably, above-mentioned steps (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 15 ~ 28%.
Preferably, step (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 20 ~ 26%.
Preferred, step (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 25%.
Preferably, in step (4), ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.15 ~ 0.35kg ammoniacal liquor.
Preferred, in step (4), ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.25kg ammoniacal liquor.
Preferably, in step (4), churning time is 20min.
Beneficial effect of the present invention: a kind of high colloid index kleit preparation method comprises the following steps, (1) slurrying disperses: kaolin is dissolved in water to dispersion, make base-material; (2) desanding impurity elimination: base-material is carried out to desanding and remove coarse grain impurity, make ore pulp primary material; (3) bleaching: ore pulp primary material is carried out to bleaching, make ore pulp fine fodder; (4) ammoniacal liquor modification: be 15 ~ 29% ammoniacal liquor toward adding mass percentage concentration in ore pulp fine fodder, more fully stir 15 ~ 25min, ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.1 ~ 0.35kg ammoniacal liquor; (5) washing is dry: the ore pulp fine fodder through step (4) ammoniacal liquor modification is carried out to circulation cleaning dehydration, and the ore pulp fine fodder after washing dehydration is dried, make high colloid index kaolin.Compared with prior art, the present invention adds ammoniacal liquor to carry out modification after completing steps (3) in ore pulp fine fodder, change kaolinic wetting ability, dispersiveness and swelling property, make to obtain the kaolin colloid index finally making native higher than 90ml/15g, be specially adapted to the catalyzer as catalytic cracking reaction in petroleum chemical industry.
Embodiment
The invention will be further described with the following Examples.
embodiment 1.
A high colloid index kleit preparation method, comprises the following steps,
(1) slurrying disperses: kaolin is dissolved in water to dispersion, then add the abundant dispersed with stirring of dispersion agent, make base-material, strengthen the dispersiveness of kaolin in water, improve gloss, improve tinting strength and opacifying power, improve color developing and toning property, prevent floating, prevent flocculation, settlement prevention; The dispersion agent of the present embodiment is a kind of or two or more in six inclined to one side sodium sulfate, trisodium phosphate and organic polypropylene;
(2) desanding impurity elimination: base-material is successively carried out to desanding removal coarse grain impurity through settling pit and spiral classification sand removing machine, make ore pulp primary material;
(3) bleaching: ore pulp primary material is delivered in stirred pot, adds sulphuric acid soln and SODIUM HYDROSULPHITE sodium solution, regulate pH value to 2.0 ~ 3.0 of mixed solution, make ore pulp fine fodder;
(4) ammoniacal liquor modification: be 10 ~ 29% ammoniacal liquor toward adding mass percentage concentration in ore pulp fine fodder, more fully stir 15 ~ 25min, ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.1 ~ 0.35kg ammoniacal liquor;
(5) washing is dry: the ore pulp fine fodder through step (4) ammoniacal liquor modification is carried out to circulation cleaning dehydration, and the ore pulp fine fodder after washing dehydration is dried, make high colloid index kaolin.
High colloid index kleit preparation method of the present invention adds ammoniacal liquor to carry out modification after completing steps (3) in ore pulp fine fodder, the NH obtaining due to the distinctive weak base of ammoniacal liquor and hydrolysis thereof
4 +ion can effectively change kaolinic wetting ability, dispersiveness and swelling property, make the kaolin colloid index that obtains finally making higher than 90ml/15g soil, be specially adapted to the catalyzer as catalytic cracking reaction in petroleum chemical industry, meet the demand of petroleum chemical industry.
embodiment 2.
A kind of high colloid index kleit preparation method of the present embodiment, comprises the following steps,
(1) slurrying disperses: kaolin is dissolved in water to dispersion, then add the abundant dispersed with stirring of dispersion agent, make base-material; The dispersion agent of the present embodiment is a kind of or two or more in six inclined to one side sodium sulfate, trisodium phosphate and organic polypropylene;
(2) desanding impurity elimination: base-material is successively carried out to desanding removal coarse grain impurity through settling pit and spiral classification sand removing machine, make ore pulp primary material;
(3) iron removal by magnetic separation, is used magnet to draw the iron mineral of removing ore pulp primary material;
(4) bleaching: the ore pulp primary material after iron removal by magnetic separation step process is delivered in stirred pot, adds sulphuric acid soln and SODIUM HYDROSULPHITE sodium solution, regulate pH value to 2.0 ~ 3.0 of mixed solution, make ore pulp fine fodder;
(5) ammoniacal liquor modification: be 10 ~ 29% ammoniacal liquor toward adding mass percentage concentration in ore pulp fine fodder, more fully stir 15 ~ 25min, ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.1 ~ 0.35kg ammoniacal liquor;
(6) washing is dry: the ore pulp fine fodder through step (4) ammoniacal liquor modification is carried out to circulation cleaning dehydration, and the ore pulp fine fodder after washing dehydration is carried out to filter-press dehydration, obtain kaolin filter cake, by kaolin filter cake high temperature drying, then dried filter cake is pulverized to grinding, make high colloid index kaolin.
A kind of high colloid index kleit preparation method of the present embodiment has increased iron removal by magnetic separation step, removes the iron filings of sneaking in a small amount of iron mineral of containing in kaolin and production process, and the ore pulp fine fodder making is purer, and quality product is higher.
embodiment 3.
A kind of high colloid index kleit preparation method of the present embodiment and the difference of embodiment 1 are, the step of the present embodiment (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 10%, and ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.15kg ammoniacal liquor, and churning time is 15min.Other steps and the principle of the present embodiment are identical with embodiment 1, do not repeat them here.
embodiment 4.
A kind of high colloid index kleit preparation method of the present embodiment and the difference of embodiment 1 are, the step of the present embodiment (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 29%, and ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.35kg ammoniacal liquor, and churning time is 25min.Other steps and the principle of the present embodiment are identical with embodiment 1, do not repeat them here.
embodiment 5.
A kind of high colloid index kleit preparation method of the present embodiment and the difference of embodiment 1 are, the step of the present embodiment (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 15%, and ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.2kg ammoniacal liquor, and churning time is 20min.Other steps and the principle of the present embodiment are identical with embodiment 1, do not repeat them here.
embodiment 6.
A kind of high colloid index kleit preparation method of the present embodiment and the difference of embodiment 1 are, the step of the present embodiment (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 28%, and ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.3kg ammoniacal liquor, and churning time is 25min.Other steps and the principle of the present embodiment are identical with embodiment 1, do not repeat them here.
embodiment 7.
A kind of high colloid index kleit preparation method of the present embodiment and the difference of embodiment 1 are, the step of the present embodiment (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 25%, and ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.25kg ammoniacal liquor, and churning time is 20min.Other steps and the principle of the present embodiment are identical with embodiment 1, do not repeat them here.
embodiment 8.
A kind of high colloid index kleit preparation method of the present embodiment and the difference of embodiment 1 are, the step of the present embodiment (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 26%, and ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.25kg ammoniacal liquor, and churning time is 20min.Other steps and the principle of the present embodiment are identical with embodiment 1, do not repeat them here.
embodiment 9.
A kind of high colloid index kleit preparation method of the present embodiment and the difference of embodiment 1 are, the step of the present embodiment (4) ammoniacal liquor modification, the mass percentage concentration of ammoniacal liquor is 20%, and ammoniacal liquor addition is that ore pulp fine fodder per ton adds 0.25kg ammoniacal liquor, and churning time is 20min.Other steps and the principle of the present embodiment are identical with embodiment 1, do not repeat them here.
embodiment 10.
A kind of high colloid index kleit preparation method of the present embodiment and the difference of embodiment 1 be, the dispersion agent in the present embodiment step (1) and kaolinic mass ratio are 0.1:50 ~ 0.1:100.Other steps and the principle of the present embodiment are identical with embodiment 1, do not repeat them here.
Finally should be noted that; above embodiment is only for illustrating technical scheme of the present invention but not limiting the scope of the invention; although the present invention is explained in detail with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. a high colloid index kleit preparation method, is characterized in that: comprises the following steps,
(1) slurrying disperses: kaolin is dissolved in water to dispersion, make base-material;
(2) desanding impurity elimination: described base-material is carried out to desanding and remove coarse grain impurity, make ore pulp primary material;
(3) bleaching: described ore pulp primary material is carried out to bleaching, make ore pulp fine fodder;
(4) ammoniacal liquor modification: adding mass percentage concentration in described ore pulp fine fodder is 10 ~ 29% ammoniacal liquor, more fully stirs 15 ~ 25min, the addition of described ammoniacal liquor is that ore pulp fine fodder per ton adds ammoniacal liquor described in 0.1 ~ 0.35kg;
(5) washing is dry: the ore pulp fine fodder through step (4) ammoniacal liquor modification is carried out to circulation cleaning dehydration, and the ore pulp fine fodder after washing dehydration is dried, make high colloid index kaolin.
2. a kind of high colloid index kleit preparation method according to claim 1, it is characterized in that: also comprise iron removal by magnetic separation step, described iron removal by magnetic separation step is located between step (2) and step (3), and described iron removal by magnetic separation step is for being used magnet to draw the iron mineral of removing ore pulp primary material.
3. a kind of high colloid index kleit preparation method according to claim 1, is characterized in that: in above-mentioned steps (1), described kaolin adds dispersion agent after dissolving in water and disperseing again, makes base-material.
4. a kind of high colloid index kleit preparation method according to claim 3, is characterized in that: described dispersion agent is a kind of or two or more in six inclined to one side sodium sulfate, trisodium phosphate and organic polypropylene.
5. a kind of high colloid index kleit preparation method according to claim 1, is characterized in that: above-mentioned steps (4) ammoniacal liquor modification, the mass percentage concentration of described ammoniacal liquor is 15 ~ 28%.
6. a kind of high colloid index kleit preparation method according to claim 5, is characterized in that: described step (4) ammoniacal liquor modification, the mass percentage concentration of described ammoniacal liquor is 20 ~ 26%.
7. a kind of high colloid index kleit preparation method according to claim 6, is characterized in that: described step (4) ammoniacal liquor modification, the mass percentage concentration of described ammoniacal liquor is 25%.
8. a kind of high colloid index kleit preparation method according to claim 1, is characterized in that: in described step (4), described ammoniacal liquor addition is that ore pulp fine fodder per ton adds ammoniacal liquor described in 0.15 ~ 0.35kg.
9. a kind of high colloid index kleit preparation method according to claim 1, is characterized in that: in described step (4), described ammoniacal liquor addition is that ore pulp fine fodder per ton adds ammoniacal liquor described in 0.25kg.
10. a kind of high colloid index kleit preparation method according to claim 1, is characterized in that: in described step (4), churning time is 20min.
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| CN104446345B (en) * | 2014-11-05 | 2016-03-30 | 吴俊荣 | The preparation method of kaolin whipping agent |
| CN104528749B (en) * | 2015-01-20 | 2016-06-15 | 江西省源通陶瓷科技有限公司 | A kind of process of feldspar concentrate chemical whitening |
| CN106964481B (en) * | 2017-04-26 | 2018-11-23 | 揭阳恒成陶瓷科技有限公司 | The technique of mica in a kind of separation kaolin |
| 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 |
| CN111747732A (en) * | 2020-05-13 | 2020-10-09 | 九江市璀鑫新材料有限公司 | High-tightness magnesium composite material and manufacturing method thereof |
| CN111547777B (en) * | 2020-05-22 | 2022-01-28 | 昆明理工大学 | Method for removing arsenic in contaminated acid by ferroferric oxide/kaolin nanocomposite |
| CN113683093A (en) * | 2021-08-20 | 2021-11-23 | 中国高岭土有限公司 | Preparation method of kaolin for cracking catalyst |
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| US4210574A (en) * | 1976-02-04 | 1980-07-01 | Ethyl Corporation | Process for preparing filled polyvinyl chloride compositions |
| CN101392183A (en) * | 2008-03-26 | 2009-03-25 | 中国高岭土公司 | Method for preparing kaoline products for catalytic cracking catalyst |
| CN102786818A (en) * | 2012-06-29 | 2012-11-21 | 赵曰浩 | Method for whitening kaolin by using surface cladding method |
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- 2012-12-17 CN CN201210546755.2A patent/CN102976348B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4210574A (en) * | 1976-02-04 | 1980-07-01 | Ethyl Corporation | Process for preparing filled polyvinyl chloride compositions |
| CN101392183A (en) * | 2008-03-26 | 2009-03-25 | 中国高岭土公司 | Method for preparing kaoline products for catalytic cracking catalyst |
| CN102786818A (en) * | 2012-06-29 | 2012-11-21 | 赵曰浩 | Method for whitening kaolin by using surface cladding method |
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