CN104743563B - Process for purifying kaolin - Google Patents
Process for purifying kaolin Download PDFInfo
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- CN104743563B CN104743563B CN201510159794.0A CN201510159794A CN104743563B CN 104743563 B CN104743563 B CN 104743563B CN 201510159794 A CN201510159794 A CN 201510159794A CN 104743563 B CN104743563 B CN 104743563B
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- pulp slurry
- kaolin
- serosity
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- concentrate
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- 239000005995 Aluminium silicate Substances 0.000 title claims abstract description 43
- 235000012211 aluminium silicate Nutrition 0.000 title claims abstract description 43
- 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 43
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000008569 process Effects 0.000 title abstract description 5
- 238000001354 calcination Methods 0.000 claims abstract description 22
- 238000004061 bleaching Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 238000007885 magnetic separation Methods 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 10
- 239000001117 sulphuric acid Substances 0.000 claims abstract description 10
- 235000011149 sulphuric acid Nutrition 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 9
- 239000007844 bleaching agent Substances 0.000 claims abstract description 8
- 239000006148 magnetic separator Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000013055 pulp slurry Substances 0.000 claims description 48
- 239000012141 concentrate Substances 0.000 claims description 20
- 239000012065 filter cake Substances 0.000 claims description 19
- 238000001556 precipitation Methods 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000012190 activator Substances 0.000 claims description 8
- 241000219112 Cucumis Species 0.000 claims description 7
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 7
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 239000000908 ammonium hydroxide Substances 0.000 claims description 5
- 229910001424 calcium ion Inorganic materials 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 150000004665 fatty acids Chemical class 0.000 claims description 5
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 5
- 239000003208 petroleum Substances 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 5
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 5
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 5
- 239000003784 tall oil Substances 0.000 claims description 5
- HSYFJDYGOJKZCL-UHFFFAOYSA-L zinc;sulfite Chemical compound [Zn+2].[O-]S([O-])=O HSYFJDYGOJKZCL-UHFFFAOYSA-L 0.000 claims description 3
- 238000000746 purification Methods 0.000 abstract description 8
- 238000005406 washing Methods 0.000 abstract description 3
- 239000002244 precipitate Substances 0.000 abstract 2
- 230000003213 activating effect Effects 0.000 abstract 1
- 235000019580 granularity Nutrition 0.000 abstract 1
- 238000004537 pulping Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 17
- 239000011707 mineral Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001458 anti-acid effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Paper (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention discloses a process for purifying kaolin. The process comprises the following steps: putting kaolin and water in a pulping machine at a mass ratio of 1:4 so as to prepare ore pulp; putting the prepared ore pulp in a hydrocyclone to settle sand and grade granularities; then, putting the ore pulp in a high-gradient magnetic separator, and carrying out high-gradient magnetic separation so as to prepare fine ore pulp; putting the prepared fine ore pulp in a washing tank, adjusting the PH value of the ore pulp to be 4.5-5 by adding sulphuric acid, transferring into a bleaching tank, and adding a reducing agent to bleach; adding a dispersing agent and a PH value adjusting agent into the bleached ore pulp so as to scrub the ore pulp; adding an activating agent and a collecting agent into the scrubbed solution, and putting in a high-shear stirrer to stir and precipitate; and filtering, washing and drying precipitates, putting in a calcination box to calcinate at 700-900 DEG C, and crushing to obtain the purified kaolin. By means of the process for purifying kaolin, the whiteness and purification purity of kaolin are effectively increased.
Description
Technical field
The present invention relates to mineral dust purification technique field, a kind of kaolinic purifying technique.
Background technology
Mineral resources are non-renewable, and the mineral resources of high-quality are the most rare.Along with the continuous expansion of inorganic mineral application, the most increasing to the demand of high-quality inorganic mineral powder, therefore inferior inorganic mineral raw material is of great significance by purifying its quality of raising just tool.At present, application and the industry of inorganic mineral powder are numerous, increase its chemical stability as added to, increase the service life in some raw materials, also can increase special nature and the effect on its surface；Inorganic mineral powder after coupling agent modified, can increase thermoplasticity, the plasticity of thermosetting resin and tensile strength, and reduce thermal expansion；Inorganic mineral can be also used for steel and iron industry, prevents crack from occurring, and controls solder flux consumption；Can be used for rubber industry, as lubricant and releasing agent.After purification high-quality inorganic mineral Kaolin have that whiteness is high, matter dispersion soft, easy suspends in water, good plasticity and high caking property, excellent electrical insulation capability, it also has good antiacid dissolubility, the lowest cation exchange capacity (CEC), the physicochemical property such as the most fire-resistant in addition.Therefore Kaolin has become raw mineral materials necessary to tens industries such as papermaking, pottery, rubber, chemical industry, coating, medicine and national defence.
In order to meet the requirement to inorganic mineral powder Kaolin purity of industry-by-industry and field, it is thus desirable to inorganic mineral Kaolin is carried out purification processes, it is the effective means improving inorganic mineral Kaolin service efficiency, is the most also to save mineral resources, raising utilization rate and reduce the effective ways of waste.
Summary of the invention
It is an object of the invention to provide a kind of kaolinic purifying technique, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme: a kind of kaolinic purifying technique, comprises the following steps:
The first step, is placed in smash by Kaolin and water example 1:4 in mass ratio and makes pulp slurry in pulp grinder；
Second step, is placed in the pulp slurry prepared in the first step in hydrocyclone and carries out dropping sand and grading；
3rd step, is placed in the pulp slurry prepared in second step in high gradient magnetic separator and carries out high-gradient magnetic separation, prepares concentrate serosity；
4th step, is placed in the concentrate serosity that the 3rd step obtains in sink, and the pH value adding sulphuric acid regulation pulp slurry is 4.5-5, is transferred to bleach in melon tank, adds reducing agent and bleaches；
5th step, in the 4th step, the pulp slurry after bleaching adds dispersant and pulp slurry is cleaned by pH value regulator；
6th step, after adding activator and collecting agent, is placed in high-shear impeller and is stirred precipitation in the solution after cleaning；
7th step, carries out the precipitation obtained in the 6th step filtering, washes, dries, and calcines in being placed in calcining case between 700-900 DEG C, Kaolin after purification i.e. after pulverizing.
Preferably, in the 4th step, the concentration of described sulphuric acid is 0.5-1mol/L, and the purity of described sulphuric acid is at least chemical pure.
Preferably, in the 4th step, described reducing agent is at least one in sodium dithionite, sodium thiosulfate and zinc sulfite three.
Preferably, in the 5th step, described dispersant is sodium silicate.
Preferably, in the 5th step, described pH regulator is at least one in ammonium hydroxide and sodium hydroxide.
Preferably, in the 6th step, described activator is at least one in calcium ion and magnesium ion.
Preferably, in the 6th step, described collecting agent is at least one in alkyl hydroximic acid, tall oil, fatty acid and petroleum sodium sulfonate.
Preferably, in the 7th step, described precipitation washing 3-4 time, the filter cake of precipitation filtration gained is placed in baking oven and dries at 80-100 DEG C.
nullCompared with prior art，The invention has the beneficial effects as follows: this kaolinic purifying technique，Not only process technique simple、Easily operated，And it is low for equipment requirements、Corrosivity is little，The processing step utilizing slurrying fall sand magnetic separation bleaching to clean precipitation calcining carries out purification and will not introduce other impurity，First carry out Kaolin pulverizing processing with water slurrying in proportion，Be conducive to fall sand below、Magnetic separation、Bleaching、Clean、Precipitation and calcination processing，By kaolin ore serosity being cleaned under conditions of existing at dispersant and pH regulator，Can effectively remove the pollution mineral on surface，Clean simultaneously and sharp Qin Kuang and bloodstone also can be made to separate from Kaolin，Effectively raise the purity that Kaolin purifies，So that Kaolin purify the most even thoroughly，The feature of environmental protection is good，And it is prone to industrialization，It is applicable to the different kaolinic purification processes of geology，After purification, Kaolin whiteness high-quality is good，Can be widely used for industry-by-industry and field，Disclosure satisfy that the requirement of some property industries，Effectively raise the kaolinic surcharge of inorganic mineral and the economic benefit of relevant enterprise.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention is not limited to this.
Embodiment 1:
It is placed in smash by 100g Kaolin and 400mL water and pulp grinder is made pulp slurry；Pulp slurry is placed in hydrocyclone and carries out dropping sand and grading；Then pulp slurry is placed in high gradient magnetic separator and carries out magnetic separation, prepare concentrate serosity；Being placed in sink by concentrate serosity, the pH value of concentrate serosity is regulated to 4.5 by the sulphuric acid adding 0.5mol/L, and the pulp slurry mixing up pH value is transferred to bleach in melon tank, adds reducing agent sodium dithionite and carries out bleaching；Pulp slurry after bleaching adds dispersant sodium silicate and pH value regulator ammonium hydroxide, pulp slurry is cleaned；Add activator calcium ion and collecting agent tall oil, fatty acid and petroleum sodium sulfonate to the pulp slurry cleaned, be subsequently placed in high-shear impeller and be stirred precipitation；Precipitation is placed in sucking filtration machine filter, the filter cake filtering gained is washed 3 times, is subsequently placed in baking oven and dries at 80 DEG C；Filter cake after drying is placed in calcining furnace at 700 DEG C calcining, then the filter cake after calcining is pulverized the Kaolin after both being purified.Kaolin whiteness after purifying after testing is 95.8, and in Kaolin, impurity content is 0.7%.
Embodiment 2:
It is placed in smash by 200g Kaolin and 800mL water and pulp grinder is made pulp slurry；Pulp slurry is placed in hydrocyclone and carries out dropping sand and grading；Then pulp slurry is placed in high gradient magnetic separator and carries out magnetic separation, prepare concentrate serosity；Being placed in sink by concentrate serosity, the pH value of concentrate serosity is regulated to 5 by the sulphuric acid adding 0.5mol/L, and the pulp slurry mixing up pH value is transferred to bleach in melon tank, adds reducing agent sodium dithionite and sodium thiosulfate carries out bleaching；Pulp slurry after bleaching adds dispersant sodium silicate and pH value regulator sodium hydroxide, pulp slurry is cleaned；Add activator magnesium ion and collecting agent alkyl hydroximic acid to the pulp slurry cleaned, be subsequently placed in high-shear impeller and be stirred precipitation；Precipitation is placed in sucking filtration machine filter, the filter cake filtering gained is washed 4 times, is subsequently placed in baking oven and dries at 90 DEG C；Filter cake after drying is placed in calcining furnace at 800 DEG C calcining, then the filter cake after calcining is pulverized the Kaolin after both being purified.Kaolin whiteness after purifying after testing is 97.2, and in Kaolin, impurity content is 0.2%.
Embodiment 3:
It is placed in smash by 200g Kaolin and 800mL water and pulp grinder is made pulp slurry；Pulp slurry is placed in hydrocyclone and carries out dropping sand and grading；Then pulp slurry is placed in high gradient magnetic separator and carries out magnetic separation, prepare concentrate serosity；Being placed in sink by concentrate serosity, the pH value of concentrate serosity is regulated to 5 by the sulphuric acid adding 1mol/L, and the pulp slurry mixing up pH value is transferred to bleach in melon tank, adds reducing agent sodium dithionite, sodium thiosulfate and zinc sulfite and carries out bleaching；Pulp slurry after bleaching adds dispersant sodium silicate and pH value regulator ammonium hydroxide and sodium hydroxide, pulp slurry is cleaned；Add activator calcium ion and magnesium ion and collecting agent alkyl hydroximic acid tall oil, fatty acid and petroleum sodium sulfonate to the pulp slurry cleaned, be subsequently placed in high-shear impeller and be stirred precipitation；Precipitation is placed in sucking filtration machine filter, the filter cake filtering gained is washed 4 times, is subsequently placed in baking oven and dries at 100 DEG C；Filter cake after drying is placed in calcining furnace at 900 DEG C calcining, then the filter cake after calcining is pulverized the Kaolin after both being purified.Kaolin whiteness after purifying after testing is 96.3, and in Kaolin, impurity content is 0.4%.
The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; according to technical scheme and inventive concept equivalent or change in addition thereof, all should contain within protection scope of the present invention.
Claims (3)
1. a kaolinic purifying technique, it is characterised in that comprise the following steps: be placed in smash by 100g Kaolin and 400mL water and make pulp slurry in pulp grinder；Pulp slurry is placed in hydrocyclone and carries out dropping sand and grading；Then pulp slurry is placed in high gradient magnetic separator and carries out magnetic separation, prepare concentrate serosity；Concentrate serosity is placed in sink, adds the sulphuric acid of 0.5mol/L by the pH of concentrate serosity
Value regulation, to 4.5, is transferred to the pulp slurry mixing up pH value to bleach in melon tank, adds reducing agent sodium dithionite and carries out bleaching；Pulp slurry after bleaching adds dispersant sodium silicate and pH
Value regulator ammonium hydroxide, cleans pulp slurry；Add activator calcium ion and collecting agent tall oil, fatty acid and petroleum sodium sulfonate to the pulp slurry cleaned, be subsequently placed in high-shear impeller and be stirred precipitation；Precipitation is placed in sucking filtration machine filter, the filter cake filtering gained is washed 3 times, is subsequently placed in baking oven and dries at 80 DEG C；Filter cake after drying is placed in calcining furnace at 700 DEG C calcining, then the filter cake after calcining is pulverized the Kaolin after both being purified；Kaolin whiteness after purifying after testing is 95.8, and in Kaolin, impurity content is 0.7%.
2. a kaolinic purifying technique, it is characterised in that comprise the following steps: be placed in smash by 200g Kaolin and 800mL water and make pulp slurry in pulp grinder；Pulp slurry is placed in hydrocyclone and carries out dropping sand and grading；Then pulp slurry is placed in high gradient magnetic separator and carries out magnetic separation, prepare concentrate serosity；Concentrate serosity is placed in sink, adds the sulphuric acid of 0.5mol/L by the pH of concentrate serosity
Value regulation, to 5, is transferred to the pulp slurry mixing up pH value to bleach in melon tank, adds reducing agent sodium dithionite and sodium thiosulfate carries out bleaching；Pulp slurry after bleaching adds dispersant sodium silicate and pH
Value regulator sodium hydroxide, cleans pulp slurry；Add activator magnesium ion and collecting agent alkyl hydroximic acid to the pulp slurry cleaned, be subsequently placed in high-shear impeller and be stirred precipitation；Precipitation is placed in sucking filtration machine filter, the filter cake filtering gained is washed 4 times, is subsequently placed in baking oven and dries at 90 DEG C；Filter cake after drying is placed in calcining furnace at 800 DEG C calcining, then the filter cake after calcining is pulverized the Kaolin after both being purified；Kaolin whiteness after purifying after testing is 97.2, and in Kaolin, impurity content is 0.2%.
3. a kaolinic purifying technique, it is characterised in that comprise the following steps: be placed in smash by 200g Kaolin and 800mL water and make pulp slurry in pulp grinder；Pulp slurry is placed in hydrocyclone and carries out dropping sand and grading；Then pulp slurry is placed in high gradient magnetic separator and carries out magnetic separation, prepare concentrate serosity；Concentrate serosity is placed in sink, adds the sulphuric acid of 1mol/L by the pH of concentrate serosity
Value regulation, to 5, is transferred to the pulp slurry mixing up pH value to bleach in melon tank, adds reducing agent sodium dithionite, sodium thiosulfate and zinc sulfite and carries out bleaching；Pulp slurry after bleaching adds dispersant sodium silicate and pH
Value regulator ammonium hydroxide and sodium hydroxide, clean pulp slurry；Add activator calcium ion and magnesium ion and collecting agent alkyl hydroximic acid tall oil, fatty acid and petroleum sodium sulfonate to the pulp slurry cleaned, be subsequently placed in high-shear impeller and be stirred precipitation；Precipitation is placed in sucking filtration machine filter, the filter cake filtering gained is washed 4 times, is subsequently placed in baking oven and dries at 100 DEG C；Filter cake after drying is placed in calcining furnace at 900 DEG C calcining, then the filter cake after calcining is pulverized the Kaolin after both being purified；Kaolin whiteness after purifying after testing is 96.3, and in Kaolin, impurity content is 0.4%.
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| CN201510159794.0A CN104743563B (en) | 2015-04-07 | 2015-04-07 | Process for purifying kaolin |
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| CN201510159794.0A CN104743563B (en) | 2015-04-07 | 2015-04-07 | Process for purifying kaolin |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105268544B (en) * | 2015-12-01 | 2018-02-23 | 中国矿业大学 | A kind of wide grade Coaseries kaolin process for upgrading based on fluidization sorting |
| CN105836754B (en) * | 2016-06-03 | 2017-10-17 | 辽宁石化职业技术学院 | A kind of kaolinic method for bleaching |
| CN107042154A (en) * | 2017-06-15 | 2017-08-15 | 长沙矿冶研究院有限责任公司 | A kind of wet method processing technology of sandy kaoline |
| 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 |
| CN109336126B (en) * | 2018-12-18 | 2020-06-16 | 广西壮族自治区地质矿产测试研究中心 | Method for purifying high-iron low-grade kaolin |
| CN110407219A (en) * | 2019-08-23 | 2019-11-05 | 福建新汉唐非金属材料有限公司 | A kind of preparation process improving kaolin whiteness |
| CN111789114A (en) * | 2020-07-19 | 2020-10-20 | 江苏云帆化工有限公司 | Butylbenzene-clomazone dry suspending agent and preparation method thereof |
| CN114798182B (en) * | 2022-04-22 | 2024-08-09 | 深圳市中金岭南有色金属股份有限公司 | Activator for improving tennantite floating rate and application method thereof |
| CN117819559A (en) * | 2023-12-29 | 2024-04-05 | 安徽金岩高岭土新材料股份有限公司 | Purification process of kaolin |
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| CN100584896C (en) * | 2007-08-24 | 2010-01-27 | 中国地质大学（武汉） | A kind of production technology of papermaking coating grade kaolin |
| CN101987480A (en) * | 2009-07-31 | 2011-03-23 | 施永义 | Preparation method of non-pickling raw kaolin ore |
| CN101723391B (en) * | 2009-12-10 | 2012-04-04 | 厦门大学 | A kind of bleaching production method of washed iron-dyed kaolin |
| CN103086390A (en) * | 2012-11-16 | 2013-05-08 | 中国地质大学（武汉） | Technique for efficiently removing iron from kaolin |
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