CN108707878B - Method for recovering waste liquid of chemical oxidation treatment on metal surface - Google Patents
Method for recovering waste liquid of chemical oxidation treatment on metal surface Download PDFInfo
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- CN108707878B CN108707878B CN201810328955.8A CN201810328955A CN108707878B CN 108707878 B CN108707878 B CN 108707878B CN 201810328955 A CN201810328955 A CN 201810328955A CN 108707878 B CN108707878 B CN 108707878B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1617—Purification and regeneration of coating baths
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/86—Regeneration of coating baths
Abstract
The invention provides a method for recovering waste liquid from chemical oxidation treatment of a metal surface, which comprises the following steps: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture.
Description
Technical Field
The invention relates to the field of recovery of waste liquid of metal surface treatment, in particular to a method for recovering waste liquid of metal surface chemical oxidation treatment.
Background
The Chinese economy develops rapidly since the reform is open, especially after the 21 st century, but the development of the Chinese economy is based on the rapid development of the processing and manufacturing industries such as electronics, chemical engineering and the like. The surface treatment is a basic industry of modern industrial development, while the chemical plating is a basic process of the surface treatment, and the chemical plating is widely applied in the fields of aerospace, petrochemical industry, electronics, machinery, textile and the like because of the advantages of simple and convenient process, uniform plating layer, good wear resistance, high hardness, no limitation of conductivity and appearance on plated parts, no need of external power supply and the like. However, the huge chemical plating industry is promoting the rapid development of modern industry and brings serious environmental pollution problem, the chemical plating bath solution which is periodically scrapped usually has the characteristics of complex pollutant components, high concentration, toxicity, harm, high treatment difficulty and the like, and besides high-concentration heavy metals, the chemical plating bath solution also contains high-concentration refractory organic matters and inorganic salts, if the waste solution is discharged into the environment, the waste solution can cause great harm to the living environment of people, and the waste solution is listed in the name of national hazardous wastes and is a 'twelve five' key management and control object in the national environmental protection field. Therefore, research and development of a green, efficient and economic chemical plating waste liquid treatment technology can reduce pollution and harm to the living environment of people to the maximum extent, and the technology is a difficult task for environmental protection workers.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a method for recovering waste liquid of metal surface chemical oxidation treatment, thereby overcoming the defects of the prior art.
In order to achieve the above object, the present invention provides a method for recovering a waste liquid from a chemical oxidation treatment of a metal surface, comprising: the method comprises the following steps: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture.
Preferably, in the above technical solution, the method further includes: and carrying out multi-stage precipitation treatment on the supernatant.
Preferably, in the above technical scheme, the drying process is as follows: the drying temperature is 400-500 ℃, and the drying time is 30-40 min.
Preferably, in the above technical scheme, the first ball milling process is as follows: the ball milling speed is 600-800r/min, and the ball milling time is 3-4 h.
Preferably, in the above technical solution, the first heat treatment process is: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 500-600 ℃, and the heat treatment time is 1-2 h.
Preferably, in the above technical scheme, the second ball milling process comprises: the ball milling speed is 500-.
Preferably, in the above technical solution, the hot pressing process includes: the pressure is 50-70MPa, the hot pressing temperature is 1200-1300 ℃, and the hot pressing time is 40-50 min.
Compared with the prior art, the invention has the following beneficial effects: the prior art has proposed many methods for treating and detoxifying waste liquid from chemical surface treatment, such as electrophoresis, precipitation, multi-stage precipitation, etc., which are effective in reducing the content of harmful heavy metals in the waste liquid, but these methods still have some drawbacks. Firstly, the method in the prior art pays attention to the harmless treatment of the waste liquid, the recovery method of the waste liquid involves less, and the method in the prior art does not really realize the recovery and the reutilization of the waste liquid. Secondly, although the prior art proposes the prior art of manufacturing hard particles by using solid substances in waste liquid, the prior art still belongs to the laboratory research stage and cannot be directly applied to actual industrial use. If the method is used in the industrial application of several tons or tens of tons, the particle size in the waste liquid is not uniform, and the produced hard particles have low density, poor strength and non-uniform shape. In order to solve the problems in the prior art, the invention provides a novel waste liquid recycling method, and the waste residues are used for producing hard particles, so that the waste liquid is really recycled. Meanwhile, due to the unique preparation process provided by the application, the method can be really applied to industrial production.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below. Exemplary embodiments of the present disclosure, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It is first noted that after subjecting the third mixture to the hot pressing treatment, hard particles can be obtained.
Example 1
The waste liquid of the metal surface chemical oxidation treatment is recovered by the following method: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture. The method further comprises the following steps: and carrying out multi-stage precipitation treatment on the supernatant. The drying process comprises the following steps: the drying temperature is 400 ℃ and the drying time is 40 min. The first ball milling process comprises the following steps: the ball milling speed is 600r/min, and the ball milling time is 4 h. The first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 500 ℃, and the heat treatment time is 2 h. The second ball milling process comprises the following steps: the ball milling speed is 500r/min, and the ball milling time is 4 h. The hot pressing treatment process comprises the following steps: the pressure is 50MPa, the hot pressing temperature is 1300 ℃, and the hot pressing time is 50 min.
Example 2
The waste liquid of the metal surface chemical oxidation treatment is recovered by the following method: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture. The method further comprises the following steps: and carrying out multi-stage precipitation treatment on the supernatant. The drying process comprises the following steps: the drying temperature is 500 ℃, and the drying time is 30 min. The first ball milling process comprises the following steps: the ball milling speed is 800r/min, and the ball milling time is 3 h. The first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 600 ℃, and the heat treatment time is 1 h. The second ball milling process comprises the following steps: the ball milling speed is 600r/min, and the ball milling time is 3 h. The hot pressing treatment process comprises the following steps: the pressure is 70MPa, the hot pressing temperature is 1200 ℃, and the hot pressing time is 40 min.
Example 3
The waste liquid of the metal surface chemical oxidation treatment is recovered by the following method: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture. The method further comprises the following steps: and carrying out multi-stage precipitation treatment on the supernatant. The drying process comprises the following steps: the drying temperature is 450 ℃ and the drying time is 35 min. The first ball milling process comprises the following steps: the ball milling speed is 700r/min, and the ball milling time is 3.5 h. The first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 550 ℃, and the heat treatment time is 1.5 h. The second ball milling process comprises the following steps: the ball milling speed is 550r/min, and the ball milling time is 3.5 h. The hot pressing treatment process comprises the following steps: the pressure is 60MPa, the hot pressing temperature is 1250 ℃, and the hot pressing time is 45 min.
Example 4
The waste liquid of the metal surface chemical oxidation treatment is recovered by the following method: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture. The method further comprises the following steps: and carrying out multi-stage precipitation treatment on the supernatant. The drying process comprises the following steps: the drying temperature is 550 ℃ and the drying time is 20 min. The first ball milling process comprises the following steps: the ball milling speed is 700r/min, and the ball milling time is 3.5 h. The first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 550 ℃, and the heat treatment time is 1.5 h. The second ball milling process comprises the following steps: the ball milling speed is 550r/min, and the ball milling time is 3.5 h. The hot pressing treatment process comprises the following steps: the pressure is 60MPa, the hot pressing temperature is 1250 ℃, and the hot pressing time is 45 min.
Example 5
The waste liquid of the metal surface chemical oxidation treatment is recovered by the following method: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture. The method further comprises the following steps: and carrying out multi-stage precipitation treatment on the supernatant. The drying process comprises the following steps: the drying temperature is 450 ℃ and the drying time is 35 min. The first ball milling process comprises the following steps: the ball milling speed is 1000r/min, and the ball milling time is 5 h. The first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 550 ℃, and the heat treatment time is 1.5 h. The second ball milling process comprises the following steps: the ball milling speed is 550r/min, and the ball milling time is 3.5 h. The hot pressing treatment process comprises the following steps: the pressure is 60MPa, the hot pressing temperature is 1250 ℃, and the hot pressing time is 45 min.
Example 6
The waste liquid of the metal surface chemical oxidation treatment is recovered by the following method: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture. The method further comprises the following steps: and carrying out multi-stage precipitation treatment on the supernatant. The drying process comprises the following steps: the drying temperature is 450 ℃ and the drying time is 35 min. The first ball milling process comprises the following steps: the ball milling speed is 700r/min, and the ball milling time is 3.5 h. The first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 700 ℃, and the heat treatment time is 0.5 h. The second ball milling process comprises the following steps: the ball milling speed is 550r/min, and the ball milling time is 3.5 h. The hot pressing treatment process comprises the following steps: the pressure is 60MPa, the hot pressing temperature is 1250 ℃, and the hot pressing time is 45 min.
Example 7
The waste liquid of the metal surface chemical oxidation treatment is recovered by the following method: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture. The method further comprises the following steps: and carrying out multi-stage precipitation treatment on the supernatant. The drying process comprises the following steps: the drying temperature is 500 ℃, and the drying time is 30 min. The first ball milling process comprises the following steps: the ball milling speed is 800r/min, and the ball milling time is 3 h. The first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 600 ℃, and the heat treatment time is 1 h. The second ball milling process comprises the following steps: the ball milling speed is 700r/min, and the ball milling time is 5 h. The hot pressing treatment process comprises the following steps: the pressure is 60MPa, the hot pressing temperature is 1250 ℃, and the hot pressing time is 45 min.
Example 8
The waste liquid of the metal surface chemical oxidation treatment is recovered by the following method: collecting the waste liquid of surface chemical oxidation treatment; filtering the waste liquid after the chemical oxidation treatment on the surface to obtain waste residue and supernatant after the chemical oxidation treatment on the surface; providing fly ash, slag and perlite; mixing fly ash, furnace slag, perlite and surface chemical oxidation treatment waste residue to obtain a first mixture; drying the first mixture; carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles; screening the first mixture of small particles to screen out a first mixture with a particle size of greater than 100 μm; carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain an activated second mixture; performing second ball milling on the second mixture to obtain a second mixture of small particles; mixing the first mixture of small particles and the second mixture of small particles to obtain a third mixture; and carrying out hot-pressing treatment on the third mixture. The method further comprises the following steps: and carrying out multi-stage precipitation treatment on the supernatant. The drying process comprises the following steps: the drying temperature is 450 ℃ and the drying time is 35 min. The first ball milling process comprises the following steps: the ball milling speed is 700r/min, and the ball milling time is 3.5 h. The first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 550 ℃, and the heat treatment time is 1.5 h. The second ball milling process comprises the following steps: the ball milling speed is 550r/min, and the ball milling time is 3.5 h. The hot pressing treatment process comprises the following steps: the pressure is 100MPa, the hot pressing temperature is 1400 ℃, and the hot pressing time is 10 min.
The hard particles obtained in examples 1 to 8 were subjected to the tests for barrel pressure strength and void ratio.
TABLE 1
| Barrel pressure intensity (MPa) | Void ratio (%) | |
| Example 1 | 5.2 | 18 |
| Example 2 | 5.3 | 17 |
| Example 3 | 5.4 | 17 |
| Example 4 | 3.7 | 23 |
| Example 5 | 3.8 | 24 |
| Example 6 | 4.1 | 27 |
| Example 7 | 3.9 | 25 |
| Example 8 | 3.4 | 25 |
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. A method for recovering waste liquid from chemical oxidation treatment of metal surface is characterized in that: the method comprises the following steps:
collecting the waste liquid of surface chemical oxidation treatment;
filtering the waste liquid after the surface chemical oxidation treatment to obtain waste residue and supernatant after the surface chemical oxidation treatment;
providing fly ash, slag and perlite;
mixing the fly ash, the slag, the perlite and the surface chemical oxidation treatment waste residue to obtain a first mixture;
drying the first mixture;
carrying out first ball milling on the dried first mixture to obtain a first mixture of small particles;
screening the first mixture to screen out the first mixture with the particle size of more than 100 mu m;
carrying out first heat treatment on the screened first mixture with the particle size of more than 100 mu m to obtain a second mixture;
performing second ball milling on the second mixture to obtain a second mixture of small particles;
mixing the first mixture and the second mixture to obtain a third mixture;
carrying out hot-pressing treatment on the third mixture;
the first heat treatment process comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 500-600 ℃, and the heat treatment time is 1-2 h;
the first ball milling process comprises the following steps: the ball milling speed is 600-800r/min, and the ball milling time is 3-4 h;
the second ball milling process comprises the following steps: the ball milling speed is 500-.
2. The method for recycling a waste liquid of a chemical oxidation treatment for a metal surface according to claim 1, wherein: the method further comprises the following steps: and carrying out multistage sedimentation treatment on the supernatant.
3. The method for recycling a waste liquid of a chemical oxidation treatment for a metal surface according to claim 1, wherein: the drying process comprises the following steps: the drying temperature is 400-500 ℃, and the drying time is 30-40 min.
4. The method for recycling a waste liquid of a chemical oxidation treatment for a metal surface according to claim 1, wherein: the hot pressing treatment process comprises the following steps: the pressure is 50-70MPa, the hot pressing temperature is 1200-1300 ℃, and the hot pressing time is 40-50 min.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015128754A (en) * | 2014-01-08 | 2015-07-16 | 三菱重工業株式会社 | Water treatment system and method |
| CN105112671A (en) * | 2015-09-15 | 2015-12-02 | 上海第二工业大学 | Harmless treatment method of electroplating sludge |
| CN105923658A (en) * | 2016-04-29 | 2016-09-07 | 湖南省小尹无忌环境能源科技开发有限公司 | Material utilization method for electroplating sludge |
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| TR201808285T4 (en) * | 2011-09-05 | 2018-07-23 | Cytec Tech Corp | Processes for recovering organic solvent extractant from solid stabilized emulsions formed in hydrometallurgical solvent extraction circuits. |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015128754A (en) * | 2014-01-08 | 2015-07-16 | 三菱重工業株式会社 | Water treatment system and method |
| CN105112671A (en) * | 2015-09-15 | 2015-12-02 | 上海第二工业大学 | Harmless treatment method of electroplating sludge |
| CN105923658A (en) * | 2016-04-29 | 2016-09-07 | 湖南省小尹无忌环境能源科技开发有限公司 | Material utilization method for electroplating sludge |
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Effective date of registration: 20201230 Address after: 213000 No.136, Liban Road, Qinxiang village, Lijia Town, Wujin District, Changzhou City, Jiangsu Province Patentee after: Changzhou saikelin Hardware Products Co.,Ltd. Address before: Room A407, Kaiwu building, 33 Gehu Middle Road, Wujin District, Changzhou City, Jiangsu Province, 213000 Patentee before: CHANGZHOU VOCATIONAL INSTITUTE OF ENGINEERING |
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