CN101824237B - Method for modifying and whitening kaolin - Google Patents
Method for modifying and whitening kaolin Download PDFInfo
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- CN101824237B CN101824237B CN2010101661499A CN201010166149A CN101824237B CN 101824237 B CN101824237 B CN 101824237B CN 2010101661499 A CN2010101661499 A CN 2010101661499A CN 201010166149 A CN201010166149 A CN 201010166149A CN 101824237 B CN101824237 B CN 101824237B
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- kaolin
- solution
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- mud
- water
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Abstract
The invention discloses a method for modifying and whitening kaolin, which comprises the following steps of: adding finely ground kaolin powder into water of which the mass is 20 to 40 percent of that of the kaolin, and fully stirring the mixture to form kaolin slurry; dissolving Co(NO3)2 in the water to prepare 0.1 to 0.2 mol/L Co(NO3)2 solution, and preparing NaOH or KOH into 0.15 to 0.35 mol/L alkaline solution, wherein the molar mass ratio of the Co(NO3)2 solution to the alkaline solution is 1:0.5-3; adding the alkaline solution into the Co(NO3)2 solution, and fully stirring the mixture to obtain a suspension of Co(OH)2; and according to a mass ratio of cobalt hydroxide to the kaolin of between 1:1,000 and 1:2,000, adding the suspension of the Co(OH)2 into the kaolin slurry, fully stirring the mixture, drying the mixture at the temperature of between 30 and 80 DEG C, crushing the mixture, and calcinating the mixture at the temperature of between 800 and 1,000 DEG C. The method has the advantages of increasing the whiteness of the kaolin, reducing the energy consumption, saving the production cost and having simple operation.
Description
Technical field
The present invention relates to the method that a kind of kaolin brightens, particularly the high kaolin of iron level is brightened the method for modification.
Background technology
Kaolin is mainly used in ceramic industry, coating, refractory materials, papermaking, paint, rubber, senior porcelain, electric wire, industrial plastic, chemical engineering industry and printing ink, food, medicine, makeup etc.The kaolin resource that I cross mainly contains three major types; A kind of is the moral ore type kaolin that becomes the ore deposit with the elevated temperature heat crack filling that Suzhou kaolin is not represented; Mostly this kaolin is tubulose, columnar crystal structure; Minority is the tabular crystal structure, need carry out classification again after the Mechanical Crushing, is fit to be processed into the product that petrochemical catalyst is used.Be Coaseries kaolin in the time of second kind, its crystalline structure has needle-like, sheet, and column, tubulose are also arranged; Because of becoming in the process of ore deposit, it polluted by coal; Must become another mineral material after the processing through the further processing of calcining back, how in rubber, high-grade paint, to use.Some processing back technical indicators are than higher also can using in papermaking paint.The third is that Maoming kaolin is the chiltern type kaolin through the weathering sedimentary mineralization of representative; Mostly its crystalline structure is sheet; Needle-like, tubular structure are also arranged, and the kaolin of tabular crystal structure is processed into high-grade coating papermaking paint product, and product granularity, whiteness, sticking concentration index require high.
The kaolin of occurring in nature output often contains some foreign pigments and influences its natural whiteness.Kaolinic whiteness is one of important indicator of its using value of decision.Staining impurity in kaolinic mainly is iron, titanium mineral and organic matter.Iron and titanium are many to be existed with rhombohedral iron ore, pyrrhosiderite, sulfurous iron ore, pyrite, limonite, auspicious titanium ore and ilmenite ores form, and their distribution in kaolin is also very complicated, and crystalline state more than 3 is mingled with wherein with the subparticle shape; The many bags of non-crystalline state person are attached to kaolin particulate surface.Particularly iron-bearing mineral all can become red oxide of iron when high-temperature calcination, causes raw material rubescent or be brick-red.
The method of removing iron by kaolin, titanium impurity is more, wherein widely used chemical process, selectively flocculate and ultra-fine flotation process and high-gradient magnetic method.Traditional chemical removal of iron zinc sulfite commonly used or S-WAT are reduced into the solubility ferro-compound with ferric compound in the kaolin, thereby sulfurous acid iron is drained with filtrating.This is more sophisticated method, but cost is higher, and operating process and wastewater treatment are complicated, and influential to the size composition of product and flowability etc.Ultra-fine flotation process needs a large amount of mineral carrier and carrier recovery, and institute is so that flow process is complicated.High-gradient high intensity magnetic separation equipment is to utilize iron, titanium oxide to have the magnetic characteristics; A kind of novel method that in high-gradient magnetic separation apparatus, sorts, but its advantage is the operation robotization, and flow process is simple; There is not the waste water pollution problem in the chemical treatment; Do not influence kaolinic size composition, cost is lower, and what still want arrives greater than 1.6 * 10
6The magneticstrength of A/m has very big difficulty technically, obtains powerful magnetic field with usual way, need to consume a large amount of electric energy, and equipment is heavy.If when selecting the some magnet of superconducting material manufacturing for use, power consumption significantly reduces.But under the superconduction situation, the protection conductor is complicated, and this improves a lot again on cost.
Adopt conventional physical concentration method, though can remove the partial impurities mineral, superfine and complicated being difficult to of symbiosis proves effective because of the coloring matter granularity.Therefore, seeking a kind of unconventional method, to eliminate ferric iron be highly significant to the influence of kaolin whiteness.
Summary of the invention
The object of the present invention is to provide a kind of kaolin to brighten the method for modification,, cut down the consumption of energy, save production cost to reduce the influence of red stone to the kaolin whiteness.
The object of the invention can be realized through following technical measures:
(1) kaolin powder that fine grinding is good adds the water that is equivalent to kaolin quality 20%-40%, fully stirs, and makes it become kaolin mud;
(2) with Co (NO
3)
2Be dissolved in the Co (NO that is made into 0.1mol/L～0.2mol/L in the water
3)
2Solution is made into the alkaline solution of 0.15mol/L～0.35mol/L, Co (NO with NaOH or KOH
3)
2Solution and alkaline solution are 1: 0.5～3 ratio in the mole mass ratio, and alkaline solution is added Co (NO
3)
2In the solution, fully stir, obtain Co (OH)
2Suspension liquid;
(3) in cobaltous hydroxide and 1: 1000～1: 2000 ratio of kaolin mass ratio, with Co (OH)
2Suspension liquid add in the kaolin mud, fully stir, dry under 30 ℃～80 ℃ temperature, pulverize, under 800 ℃ of-1000 ℃ of temperature, calcine.
The granularity of the kaolin powder that aforesaid fine grinding is good is＜6mm.
After kaolin in step (1) after the fine grinding is placed for some time, because particle is little, agglomeration might appear, for the particle that does not influence cobalt ion and the reunion of kaolinic abundant contact need handle is pulverized again.
In step (2) alkaline solution is added Co (NO
3)
2In the solution,, to use after the adding fully fast and stir, make the Co (OH) of generation
2Broken into superfine little fragment, so that contact fully with kaolin mud.
At step (3) Co (OH)
2Add in the kaolin mud, can also add some water again and make mud have flowability, in the process that stirs, can contact fully with cobalt ion.
The present invention has following advantage:
To reduce the influence of red stone to the kaolin whiteness, the kaolin whiteness is increased, cut down the consumption of energy, save production cost, simple to operate, the workmen is not needed very high requirement at technical elements.
Embodiment
Embodiment 1
The granularity of the kaolin powder that fine grinding is good is＜6mm that adding is equivalent to the water of kaolin quality 30% in kaolin, fully stirs, and makes it become kaolin mud; With Co (NO
3)
2Be dissolved in the solution that is made into concentration 0.1mol/L in the water, NaOH is made into the solution of 0.2mol/L, Co (NO
3)
2Solution and NaOH solution are by weight being to measure at 1: 1. with NaOH to going into Co (NO
3)
2In, fully stir, obtaining concentration is 0.05mol/LCo (OH)
2Suspension liquid; With the above-mentioned suspension liquid that obtains by Co (OH)
2: the kaolin weight ratio is to pour in kaolin mud at 1: 1000, fully stirs, and is dry under 30 ℃ of temperature; Exsiccant kaolin mud is pulverized, under 900 ℃ of temperature, calcine insulation obtained in 2 hours the blue streak whiteness be 83.19 kaolin.
Embodiment 2
The granularity of the kaolin powder that fine grinding is good is＜6mm that adding is equivalent to the water of kaolin quality 60%, fully stirs, and makes it become kaolin mud; With Co (NO
3)
2Be dissolved in and be made into the solution that concentration is 0.2mol/L in the water.NaOH is made into the solution of concentration 0.3mol/L, Co (NO
3)
2Solution and NaOH solution are by weight being to measure at 1: 2. with NaOH to going into Co (NO
3)
2In, fully stir, obtaining concentration is 0.08mol/LCo (OH)
2Suspension liquid; With the above-mentioned suspension liquid that obtains by Co (OH)
2: the kaolin weight ratio is to pour in kaolin mud at 1: 1250, fully stirs, and is dry under 80 ℃ of temperature; Exsiccant kaolin mud is pulverized, and under 1000 ℃ of temperature, calcining insulation, to obtain the blue streak whiteness in 2 hours be 88.2 kaolin.
Embodiment 3
The granularity of the kaolin powder that fine grinding is good is＜6mm that adding is equivalent to the water of kaolin quality 40% in kaolin, fully stirs, and makes it become kaolin mud; With Co (NO
3)
2Being dissolved in and being made into concentration in the water is 0.15mol/L solution, and KOH is made into the solution that concentration is 0.35mol/L, Co (NO
3)
2Measure by weight the ratio that is 7: 6 with KOH. with KOH to going into Co (NO
3)
2In, fully stir, obtaining concentration is 0.08mol/LCo (OH)
2Suspension liquid; With the above-mentioned suspension liquid that obtains by Co (OH)
2: the kaolin weight ratio is to pour in kaolin mud at 1: 1500, fully stirs, and is dry under 50 ℃ of temperature; Exsiccant kaolin mud is pulverized, and under 850 ℃ of temperature, calcining insulation, to obtain the blue streak whiteness in 2 hours be 85.86 kaolin.
Claims (3)
1. the method for a modifying and whitening kaolin is characterized in that comprising the steps:
(1) kaolin powder that fine grinding is good adds the water that is equivalent to kaolin quality 20%-40%, fully stirs, and makes it become kaolin mud;
(2) with Co (NO
3)
2Be dissolved in the Co (NO that is made into 0.1mol/L～0.2mol/L in the water
3)
2Solution is made into the alkaline solution of 0.15mol/L～0.35mol/L, Co (NO with NaOH or KOH
3)
2Solution and alkaline solution add Co (NO by weight the ratio that is 1: 0.5～3 with alkaline solution
3)
2In the solution, fully stir, obtain Co (OH)
2Suspension liquid;
(3) in cobaltous hydroxide and 1: 1000～1: 2000 ratio of kaolin mass ratio, with Co (OH)
2Suspension liquid add in the kaolin mud, fully stir, dry under 30 ℃～80 ℃ temperature, pulverize, under 800 ℃ of-1000 ℃ of temperature, calcine.
2. the method for a kind of modifying and whitening kaolin as claimed in claim 1 is characterized in that the granularity of the kaolin powder that described fine grinding is good is＜6mm.
3. the method for a kind of modifying and whitening kaolin as claimed in claim 1 is characterized in that described at step (3) Co (OH)
2Add in the kaolin mud, add some water again and make mud have flowability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101661499A CN101824237B (en) | 2010-05-05 | 2010-05-05 | Method for modifying and whitening kaolin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101661499A CN101824237B (en) | 2010-05-05 | 2010-05-05 | Method for modifying and whitening kaolin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101824237A CN101824237A (en) | 2010-09-08 |
| CN101824237B true CN101824237B (en) | 2012-07-04 |
Family
ID=42688413
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101661499A Expired - Fee Related CN101824237B (en) | 2010-05-05 | 2010-05-05 | Method for modifying and whitening kaolin |
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|---|---|
| CN (1) | CN101824237B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107467179A (en) * | 2017-09-19 | 2017-12-15 | 辽宁工程技术大学 | A kind of kaolin fruit and vegetable fresh-keeping agent and its manufacture application process |
| CN112028605A (en) * | 2020-09-08 | 2020-12-04 | 福建省德化县腾艺陶瓷有限公司 | Jade white porcelain prepared from modified metakaolin and preparation process thereof |
| CN113184873B (en) * | 2021-04-23 | 2022-12-02 | 内蒙古超牌新材料股份有限公司 | Preparation method of molecular sieve, low-nitrogen-adsorption hollow glass drying agent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1071027A (en) * | 1992-07-10 | 1993-04-14 | 中国科学院物理研究所 | High-magnetic heat stability cobalt improved r-di-iron trioxide magnetic and manufacture method thereof |
| CN1323757A (en) * | 2000-05-15 | 2001-11-28 | 内蒙古蒙西高新材料股份有限公司 | Superfine burnt kaolin production process |
| CN1724595A (en) * | 2005-07-07 | 2006-01-25 | 北京天之岩健康科技有限公司 | White minera powder TiO2 composite white pigment and its preparation method |
| KR100564109B1 (en) * | 2004-07-31 | 2006-03-24 | 정성근 | Medium for blue-breen algae and method for cultivating of it |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606897B2 (en) * | 1976-12-17 | 1985-02-21 | 富士写真フイルム株式会社 | Manufacturing method of magnetic iron oxide |
-
2010
- 2010-05-05 CN CN2010101661499A patent/CN101824237B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1071027A (en) * | 1992-07-10 | 1993-04-14 | 中国科学院物理研究所 | High-magnetic heat stability cobalt improved r-di-iron trioxide magnetic and manufacture method thereof |
| CN1323757A (en) * | 2000-05-15 | 2001-11-28 | 内蒙古蒙西高新材料股份有限公司 | Superfine burnt kaolin production process |
| KR100564109B1 (en) * | 2004-07-31 | 2006-03-24 | 정성근 | Medium for blue-breen algae and method for cultivating of it |
| CN1724595A (en) * | 2005-07-07 | 2006-01-25 | 北京天之岩健康科技有限公司 | White minera powder TiO2 composite white pigment and its preparation method |
Non-Patent Citations (1)
| Title |
|---|
| JP昭53-76197A 1978.07.06 |
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