CN108238781B - Method for removing iron from kaolin - Google Patents
Method for removing iron from kaolin Download PDFInfo
- Publication number
- CN108238781B CN108238781B CN201810101521.4A CN201810101521A CN108238781B CN 108238781 B CN108238781 B CN 108238781B CN 201810101521 A CN201810101521 A CN 201810101521A CN 108238781 B CN108238781 B CN 108238781B
- Authority
- CN
- China
- Prior art keywords
- slurry
- kaolin
- removing iron
- acid
- filter press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000005995 Aluminium silicate Substances 0.000 title claims abstract description 35
- 235000012211 aluminium silicate Nutrition 0.000 title claims abstract description 35
- 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 35
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 45
- 238000012545 processing Methods 0.000 claims abstract description 13
- 238000012216 screening Methods 0.000 claims abstract description 12
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 15
- 239000002689 soil Substances 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 5
- 235000006408 oxalic acid Nutrition 0.000 claims description 5
- 238000005554 pickling Methods 0.000 claims description 5
- 239000006148 magnetic separator Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000012535 impurity Substances 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/10—Eliminating iron or lime
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for removing iron from kaolin, which realizes the purpose of removing iron from kaolin taking building residue as a raw material by the steps of particle size screening, preliminary magnetic removal processing, chemical purification processing and the like of slurry prepared from the building residue.
Description
Technical Field
The invention relates to the field of ceramic raw materials, in particular to a method for removing iron from kaolin.
Background
The kaolin is widely applied to the fields of ceramics and papermaking, the building residue contains more kaolin, if the building residue can be utilized to prepare high-quality kaolin, the waste utilization can be realized, the energy is saved, the sustainable development is realized, but the building residue contains more impurities, especially more iron impurities, the traditional iron removal method mainly comprises the steps of pickling the kaolin, adding acid into slurry of the kaolin, reacting and standing for 8-10h, and then injecting a large amount of clear water to rinse out divalent iron in water, but the method consumes too long time and has low production efficiency, and the scheme is generated.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method for removing iron from kaolin with high production efficiency, wherein the kaolin takes building residue as a raw material.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for removing iron from kaolin comprises the following steps: 1. adding the building residue soil into a stirring tank, adding water, and stirring to obtain slurry; 2. carrying out classified screening on the slurry to obtain slurry; 3, carrying out primary demagnetizing processing on the slurry subjected to classified screening; 4. pickling the slurry obtained after the preliminary demagnetizing processing; 5. pouring the slurry after the acid washing into a filter press, and reserving 15-25% of space in the filter press; 6. and injecting 5-8% of the deironing kaolin slurry by mass percent into the residual space of the filter press until the mud cake is pressed to be dry, thus obtaining the deironing kaolin.
Further, step 3 comprises the steps of: introducing the slurry into a permanent magnetic high-gradient magnetic separator to obtain the slurry after rough separation.
Further, sulfuric acid, sulfurous acid and oxalic acid are added into the slurry obtained after the preliminary demagnetizing process in step 4 for acid washing.
Further, the time for pickling in step 4 is 25 to 45 minutes.
Further, the screening in step 2 was performed by a spiral classifier.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) the invention realizes the purpose of removing iron from the kaolin taking the building residue soil as the raw material by the steps of screening the particle size of the slurry prepared from the building residue soil, primarily removing magnetism, chemically purifying and processing and the like, has simple process in the whole preparation process, effectively removes impurities in the building residue soil, particularly iron impurities, and overcomes the technical prejudice that the building waste soil is waste; in the slurry after acid washing, ferrous iron is mainly kept in water, the acid-washed slurry is poured into a filter press, the water solution is positioned on the upper layer of the filter press, when the iron-removed kaolin slurry is poured into the rest space in the filter press, solute in the iron-removed kaolin slurry sinks downwards, so that water in the acid-washed slurry is pressed out, namely the ferrous iron is brought out, the mass fraction of the iron-removed kaolin slurry is 5-8%, the concentration is proper, and the problems of overlong cleaning time due to too low concentration, overhigh concentration, too short cleaning time and the like are solved. The invention realizes the effective utilization of the waste building soil while preparing the acid-washed kaolin by a simple process, changes waste into valuable, has low production cost, is beneficial to large-scale production, and can be widely applied to the ceramic industry.
(2) The preliminary demagnetization processing of the invention removes impurities by the high gradient enrichment and rough concentration of permanent magnet, and has simple process and reliable operation.
(3) The acid washing of the invention adopts sulfuric acid, sulfurous acid and oxalic acid, the reaction time is short, and the production efficiency is high.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and more obvious, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A method for removing iron from kaolin comprises the following steps:
1. adding the building residue soil into a stirring tank, adding water, and stirring to obtain slurry;
2. pouring the slurry into a spiral classifier, and obtaining the slurry after classification and screening;
3. performing primary demagnetizing processing on the slurry subjected to classified screening, specifically introducing the slurry into a permanent-magnet high-gradient magnetic separator to obtain the slurry subjected to rough screening;
4. adding sulfuric acid, sulfurous acid and oxalic acid into the slurry obtained after the preliminary magnetic removal processing for acid washing, wherein the acid washing time is 30 minutes;
5. pouring the slurry after the acid washing into a filter press, and reserving 20% of space in the filter press;
6. and injecting 5-8% of the deironing kaolin slurry by mass percent into the residual space of the filter press until the mud cake is pressed to be dry, thus obtaining the deironing kaolin.
The invention realizes the purpose of removing iron from the kaolin taking the building residue soil as the raw material by the steps of screening the particle size of the slurry prepared from the building residue soil, primarily removing magnetism, chemically purifying and processing and the like, has simple process in the whole preparation process, effectively removes impurities in the building residue soil, particularly iron impurities, and overcomes the technical prejudice that the building residue soil is waste; in the slurry after acid washing, ferrous iron is mainly kept in water, the acid-washed slurry is poured into a filter press, the water solution is positioned on the upper layer of the filter press, when the iron-removed kaolin slurry is poured into the rest space in the filter press, solute in the iron-removed kaolin slurry sinks downwards, so that water in the acid-washed slurry is pressed out, namely the ferrous iron is brought out, the mass fraction of the iron-removed kaolin slurry is 5-8%, the concentration is proper, and the problems of overlong cleaning time due to too low concentration, overhigh concentration, too short cleaning time and the like are solved. The invention realizes the effective utilization of the building residue soil while preparing the acid-washed kaolin by a simple process, changes waste into valuable, has low production cost, is beneficial to large-scale production, and can be widely applied to the ceramic industry. The preliminary demagnetization processing of the invention removes impurities by the high gradient enrichment and rough concentration of permanent magnet, and has simple process and reliable operation. The acid washing of the invention adopts sulfuric acid, sulfurous acid and oxalic acid, the reaction time is short, and the production efficiency is high.
The above description describes preferred embodiments of the invention, but it should be understood that the invention is not limited to the above embodiments, and should not be viewed as excluding other embodiments. Modifications made by those skilled in the art in light of the teachings of this disclosure, which are well known or are within the skill and knowledge of the art, are also to be considered as within the scope of this invention.
Claims (5)
1. A method for removing iron from kaolin is characterized by comprising the following steps: the method comprises the following steps:
1. adding the building residue soil into a stirring tank, adding water, and stirring to obtain slurry;
2. carrying out classified screening on the slurry to obtain slurry;
3. carrying out primary demagnetizing processing on the slurry subjected to classified screening;
4. pickling the slurry obtained after the preliminary demagnetizing processing;
5. pouring the slurry after the acid washing into a filter press, and reserving 15-25% of space in the filter press;
6. and injecting 5-8% of the deironing kaolin slurry by mass percent into the residual space of the filter press until the mud cake is pressed to be dry, thus obtaining the deironing kaolin.
2. The method for removing iron from kaolin according to claim 1, wherein: the step 3 comprises the following steps: introducing the slurry into a permanent magnetic high-gradient magnetic separator to obtain the slurry after rough separation.
3. The method for removing iron from kaolin according to claim 1 or 2, wherein: and 4, adding sulfuric acid, sulfurous acid and oxalic acid into the slurry obtained after the primary demagnetizing processing for acid washing.
4. The method for removing iron from kaolin as claimed in claim 3, wherein: the pickling time in the step 4 is 25-45 minutes.
5. The method for removing iron from kaolin according to claim 1, wherein: the screening in step 2 was performed by a spiral classifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810101521.4A CN108238781B (en) | 2018-02-01 | 2018-02-01 | Method for removing iron from kaolin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810101521.4A CN108238781B (en) | 2018-02-01 | 2018-02-01 | Method for removing iron from kaolin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108238781A CN108238781A (en) | 2018-07-03 |
| CN108238781B true CN108238781B (en) | 2020-10-13 |
Family
ID=62698752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810101521.4A Active CN108238781B (en) | 2018-02-01 | 2018-02-01 | Method for removing iron from kaolin |
Country Status (1)
| Country | Link |
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| CN (1) | CN108238781B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109772578B (en) * | 2019-01-28 | 2021-05-07 | 厦门欣意盛新材料科技有限公司 | Treatment process for comprehensive utilization of kaolin tailings |
| CN111170718A (en) * | 2019-12-31 | 2020-05-19 | 深圳市华域环保科技有限公司 | Method for treating metal substances in building waste soil |
| CN111410204A (en) * | 2020-05-08 | 2020-07-14 | 鑫中科贸易(深圳)有限公司 | Method for preparing high-grade kaolin from sludge soil |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB576318A (en) * | 1943-12-10 | 1946-03-28 | Garco Products Inc | Improvements in or relating to the preparation of argillaceous material for use in the manufacture of pottery, glazes, enamels, glassware and the like |
| US3853983A (en) * | 1973-05-21 | 1974-12-10 | Huber Corp J M | Method for improving brightness of kaolinite clays including iron pyrites |
| CN1295040A (en) * | 2000-11-20 | 2001-05-16 | 李红 | Iron eliminating method for quartzite |
| CN1528979A (en) * | 2003-10-01 | 2004-09-15 | 茂名高岭科技有限公司 | Papermaking coating kaoline brightening and viscosity reducing process |
| CN104649679A (en) * | 2015-02-02 | 2015-05-27 | 陶正武 | High-whiteness ceramic tile and preparation method thereof |
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2018
- 2018-02-01 CN CN201810101521.4A patent/CN108238781B/en active Active
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| Publication number | Publication date |
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| CN108238781A (en) | 2018-07-03 |
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Address after: 361000, No. 117, building bridge on earthen village, Xifeng farm, Tongan District, Fujian, Xiamen Applicant after: Xiamen xinyisheng New Material Technology Co.,Ltd. Address before: 361000, No. 117, building bridge on earthen village, Xifeng farm, Tongan District, Fujian, Xiamen Applicant before: XIAMEN XINYISHENG NONMETAL MATERIAL SCIENCE & TECHNOLOGY Co.,Ltd. |
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Address after: 361000 factory building 1, No. 681, Xinmin Avenue, Tong'an District, Xiamen City, Fujian Province Applicant after: Xiamen xinyisheng New Material Technology Co.,Ltd. Address before: 361000, No. 117, building bridge on earthen village, Xifeng farm, Tongan District, Fujian, Xiamen Applicant before: Xiamen xinyisheng New Material Technology Co.,Ltd. |
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Denomination of invention: A method of removing iron from kaolin Effective date of registration: 20210508 Granted publication date: 20201013 Pledgee: Xiamen finance Company limited by guarantee Pledgor: Xiamen xinyisheng New Material Technology Co.,Ltd. Registration number: Y2021980003371 |
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Date of cancellation: 20220325 Granted publication date: 20201013 Pledgee: Xiamen finance Company limited by guarantee Pledgor: Xiamen xinyisheng New Material Technology Co.,Ltd. Registration number: Y2021980003371 |
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Denomination of invention: Method for removing iron from kaolin Effective date of registration: 20220328 Granted publication date: 20201013 Pledgee: Xiamen SME Financing Guarantee Co.,Ltd. Pledgor: Xiamen xinyisheng New Material Technology Co.,Ltd. Registration number: Y2022110000068 |
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Address after: 361000 workshop, 1st floor, No.1, 681 Xinmin Avenue, Tong'an District, Xiamen City, Fujian Province Patentee after: Xiamen Xinyisheng New Material Technology Co.,Ltd. Address before: 361000 workshop, 1st floor, No.1, 681 Xinmin Avenue, Tong'an District, Xiamen City, Fujian Province Patentee before: Xiamen xinyisheng New Material Technology Co.,Ltd. |
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Date of cancellation: 20230512 Granted publication date: 20201013 Pledgee: Xiamen SME Financing Guarantee Co.,Ltd. Pledgor: Xiamen xinyisheng New Material Technology Co.,Ltd. Registration number: Y2022110000068 |