CN111453972A - Method for removing heavy metal in ceramic glazing process - Google Patents
Method for removing heavy metal in ceramic glazing process Download PDFInfo
- Publication number
- CN111453972A CN111453972A CN202010056197.6A CN202010056197A CN111453972A CN 111453972 A CN111453972 A CN 111453972A CN 202010056197 A CN202010056197 A CN 202010056197A CN 111453972 A CN111453972 A CN 111453972A
- Authority
- CN
- China
- Prior art keywords
- filtrate
- removing heavy
- glaze
- ceramic glazing
- solution
- 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.)
- Pending
Links
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 28
- 239000000919 ceramic Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 7
- 238000001556 precipitation Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 22
- 239000000706 filtrate Substances 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000005868 electrolysis reaction Methods 0.000 claims description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 239000008394 flocculating agent Substances 0.000 claims description 6
- 239000012634 fragment Substances 0.000 claims description 6
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical group [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 6
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 239000004927 clay Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B1/00—Preparing the batches
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for removing heavy metal in ceramic glazing, which relates to the technical field of removing heavy metal in ceramic glazing, and is characterized by comprising the following steps of grinding, PH neutralization, precipitation, separation and drying. This method for removing heavy metal in glaze of pottery, through smashing and the filter sieve processing to the frit, can effectually avoid the frit to pile up or the particle volume of frit is great, influence the area of contact between frit and the solution, and the frit powder of filter sieve can obtain the efficient and mix, make the frit powder can obtain the efficient and handle, thereby can the effectual filtration efficiency who improves the heavy metal, and can the effectual effect that improves solution and handle the frit powder, can obtain high-purity glaze liquid, and the filter residue can obtain effectual collection, avoid the heavy metal to obtain leaking.
Description
Technical Field
The invention relates to the technical field of ceramic glazing heavy metal removal, in particular to a method for removing heavy metal from ceramic glazing.
Background
Ceramics are a generic term for ceramics and porcelain. The pottery was invented in the neolithic age about 8000 years ago. Common ceramic materials are clay, alumina, kaolin, and the like. Ceramic materials generally have a high hardness but a poor plasticity. Besides being used for tableware and decoration, ceramics play an important role in the development of science and technology. The ceramic raw material is extracted from a large amount of clay which is the original resource of the earth. The clay has toughness, can be plasticized when meeting water at normal temperature, can be slightly dried for carving, and can be completely dried for grinding; when the mixture is burnt to 700 ℃, the pottery can be made into pottery which can be filled with water; when the glaze is fired to 1230 ℃, the glaze is vitrified and can hardly absorb water and resist high temperature and corrosion, and the glazing is a mode that when the pottery and porcelain are fired, a blank is fired firstly, and the glaze is taken out after firing and then is fired. The glaze is made up by using quartz, feldspar, borax and clay as raw material through the processes of coating on the surface of porcelain and pottery, firing to obtain the invented product with glass luster, and can be divided into crystal glaze crack glaze, etc.
The raw materials of the glaze carry excessive heavy metals, the heavy metals in the glaze are relatively poor in filtration treatment, and the heavy metals cannot be effectively treated, so that the use safety of the ceramic is easily affected, and at the moment, a method for removing the heavy metals in the ceramic glazing is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for removing heavy metals in ceramic glazing, which solves the problems that the raw materials of glaze in the background art carry excessive heavy metals, the heavy metals in the glaze are relatively poor in filtration treatment, and the heavy metals cannot be effectively treated, so that the use safety of the ceramic is easily influenced.
In order to achieve the purpose, the invention is realized by the following technical scheme: the method for removing heavy metal in ceramic glazing is characterized by comprising the following steps:
s1, grinding: taking out the glaze fragments, placing the glaze fragments into a grinder, grinding the glaze to powder of 100-200 meshes to obtain glaze powder A;
s2, neutralization PH: placing the glaze powder A into a stirrer, and then adding a strong base solution with the concentration of 10-40 wt% to stir for neutralization reaction until the pH value of the mixed solution is 7 to obtain a filtrate A;
s3, precipitation: adding the precipitate into the filtrate A to obtain filtrate B and filter residue;
s4, separation: putting the filtrate B into a water tank, adding 10% of sodium hydroxide solution to adjust the pH value of the filtrate B to 8-9, introducing the filtrate B into an electrolytic cell for electrolysis, adding an oxidant into the electrolytic cell, adding a flocculating agent into the electrolyzed electrolyte, and filtering;
s5, drying: and (4) placing the filter residue obtained in the step into a dryer to obtain a solid substance.
Optionally, the strong alkali solution is a potassium hydroxide or sodium hydroxide solution.
Optionally, the reaction temperature of the precipitate is 20-30 ℃, the reaction time is 1-2h, the precipitant is FeSO4, the concentration of FeSO4 is 20-30%, and the volume ratio of the precipitant to the filtrate A is 1: 2-3.
Optionally, the electrolysis time is 5-10min, the electrolysis rate is 1200-.
Optionally, the drying temperature is 1000-.
Optionally, the flocculating agent is a polyacrylamide solution with the mass concentration of 0.1-0.2% and/or a polyaluminium chloride solution with the mass concentration of 0.6-0.8%.
The invention provides a method for removing heavy metals in ceramic glazing, which has the following beneficial effects:
through smashing and the filter sieve processing to the frit, can effectually avoid the frit to pile up or the particle volume of frit is great, influences the area of contact between frit and the solution, and the frit powder of filter sieve can obtain the efficient and mix for the frit powder can obtain the efficient and handle, thereby can effectually improve the filtration efficiency of heavy metal, and can effectually improve the effect that the solution was handled the frit powder, can obtain high-purity glaze liquid, and the filter residue can obtain effectual collection, avoids the heavy metal to obtain leaking.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The invention provides a technical scheme that: a method for removing heavy metal in ceramic glazing comprises the following steps:
s1, grinding: taking out the glaze fragments, placing the glaze fragments into a grinder, grinding the glaze to powder of 100-200 meshes to obtain glaze powder A;
s2, neutralization PH: placing the glaze powder A into a stirrer, and then adding a strong base solution with the concentration of 10-40 wt% to stir for neutralization reaction until the pH value of the mixed solution is 7 to obtain a filtrate A;
s3, precipitation: adding the precipitate into the filtrate A to obtain filtrate B and filter residue;
s4, separation: putting the filtrate B into a water tank, adding 10% of sodium hydroxide solution to adjust the pH value of the filtrate B to 8-9, introducing the filtrate B into an electrolytic cell for electrolysis, adding an oxidant into the electrolytic cell, adding a flocculating agent into the electrolyzed electrolyte, and filtering;
s5, drying: placing the filter residue obtained in the step into a dryer to obtain a solid substance;
the strong alkali solution is potassium hydroxide or sodium hydroxide solution, the reaction temperature of the precipitate is 20-30 ℃, the reaction time is 1-2h, the precipitator is FeSO4, the concentration of FeSO4 is 20-30%, the volume ratio of the precipitator to the filtrate A is 1:2-3, the electrolysis time is 5-10min, the electrolysis rate is 1200-1500us/cm, the current density is 5-6A/dm2, the anode and the cathode of the electrolysis are both iron electrodes, the distance between the anode and the cathode is 2-4cm, the flocculating agent is polyacrylamide solution with the mass concentration of 0.1-0.2% and/or polyaluminium chloride solution with the mass concentration of 0.6-0.8%, and the drying temperature is 1000-1200 ℃.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The method for removing heavy metal in ceramic glazing is characterized by comprising the following steps:
s1, grinding: taking out the glaze fragments, placing the glaze fragments into a grinder, grinding the glaze to powder of 100-200 meshes to obtain glaze powder A;
s2, neutralization PH: placing the glaze powder A into a stirrer, and then adding a strong base solution with the concentration of 10-40 wt% to stir for neutralization reaction until the pH value of the mixed solution is 7 to obtain a filtrate A;
s3, precipitation: adding the precipitate into the filtrate A to obtain filtrate B and filter residue;
s4, separation: putting the filtrate B into a water tank, adding 10% of sodium hydroxide solution to adjust the pH value of the filtrate B to 8-9, introducing the filtrate B into an electrolytic cell for electrolysis, adding an oxidant into the electrolytic cell, adding a flocculating agent into the electrolyzed electrolyte, and filtering;
s5, drying: and (4) placing the filter residue obtained in the step into a dryer to obtain a solid substance.
2. The method for removing heavy metals in ceramic glazing according to claim 1, characterized in that: the strong alkali solution is potassium hydroxide or sodium hydroxide solution.
3. The method for removing heavy metals in ceramic glazing according to claim 1, characterized in that: the reaction temperature of the precipitate is 20-30 ℃, the reaction time is 1-2h, the precipitant is FeSO4, the concentration of FeSO4 is 20-30%, and the volume ratio of the precipitant to the filtrate A is 1: 2-3.
4. The method for removing heavy metals in ceramic glazing according to claim 1, characterized in that: the electrolysis time is 5-10min, the electrolysis rate is 1200-1500us/cm, the current density is 5-6A/dm2, the anode and the cathode of the electrolysis are both iron electrodes, and the distance between the anode and the cathode is 2-4 cm.
5. The method for removing heavy metals in ceramic glazing according to claim 1, characterized in that: the flocculating agent is a polyacrylamide solution with the mass concentration of 0.1-0.2% and/or a polyaluminium chloride solution with the mass concentration of 0.6-0.8%.
6. The method for removing heavy metals in ceramic glazing according to claim 1, characterized in that: the drying temperature is 1000-1200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010056197.6A CN111453972A (en) | 2020-01-18 | 2020-01-18 | Method for removing heavy metal in ceramic glazing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010056197.6A CN111453972A (en) | 2020-01-18 | 2020-01-18 | Method for removing heavy metal in ceramic glazing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111453972A true CN111453972A (en) | 2020-07-28 |
Family
ID=71675795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010056197.6A Pending CN111453972A (en) | 2020-01-18 | 2020-01-18 | Method for removing heavy metal in ceramic glazing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111453972A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB487078A (en) * | 1936-03-02 | 1938-06-15 | Degussa | A process for the production of ceramic colouring matters |
| FR2721602A1 (en) * | 1994-06-27 | 1995-12-29 | Item Centre | Ceramic materials with low heavy metal content |
| US6053963A (en) * | 1998-05-21 | 2000-04-25 | Gnb Technologies, Inc. | Method for treating rotary slag |
| US20130092057A1 (en) * | 2010-03-31 | 2013-04-18 | Sumitomo Osaka Cement Co., Ltd. | Treatment Method and Treatment Apparatus for Converting Chlorine-Containing Waste into Raw Material for Cement |
| CN107935284A (en) * | 2017-11-21 | 2018-04-20 | 山东省科学院新材料研究所 | A kind of method of recycling treatment heavy metal wastewater thereby |
-
2020
- 2020-01-18 CN CN202010056197.6A patent/CN111453972A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB487078A (en) * | 1936-03-02 | 1938-06-15 | Degussa | A process for the production of ceramic colouring matters |
| FR2721602A1 (en) * | 1994-06-27 | 1995-12-29 | Item Centre | Ceramic materials with low heavy metal content |
| US6053963A (en) * | 1998-05-21 | 2000-04-25 | Gnb Technologies, Inc. | Method for treating rotary slag |
| US20130092057A1 (en) * | 2010-03-31 | 2013-04-18 | Sumitomo Osaka Cement Co., Ltd. | Treatment Method and Treatment Apparatus for Converting Chlorine-Containing Waste into Raw Material for Cement |
| CN107935284A (en) * | 2017-11-21 | 2018-04-20 | 山东省科学院新材料研究所 | A kind of method of recycling treatment heavy metal wastewater thereby |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200728 |
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| RJ01 | Rejection of invention patent application after publication |