CN104651622A - Method for separating indium from cadmium slag - Google Patents
Method for separating indium from cadmium slag Download PDFInfo
- Publication number
- CN104651622A CN104651622A CN201510083522.7A CN201510083522A CN104651622A CN 104651622 A CN104651622 A CN 104651622A CN 201510083522 A CN201510083522 A CN 201510083522A CN 104651622 A CN104651622 A CN 104651622A
- Authority
- CN
- China
- Prior art keywords
- indium
- slag
- cadmium
- impurities
- removal
- 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
- 239000002893 slag Substances 0.000 title claims abstract description 87
- 229910052738 indium Inorganic materials 0.000 title claims abstract description 51
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 47
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000012535 impurity Substances 0.000 claims abstract description 37
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 19
- 238000005406 washing Methods 0.000 claims abstract description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 48
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 238000006073 displacement reaction Methods 0.000 claims description 29
- IGUXCTSQIGAGSV-UHFFFAOYSA-K indium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[In+3] IGUXCTSQIGAGSV-UHFFFAOYSA-K 0.000 claims description 24
- NCOPCFQNAZTAIV-UHFFFAOYSA-N cadmium indium Chemical compound [Cd].[In] NCOPCFQNAZTAIV-UHFFFAOYSA-N 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000004411 aluminium Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 239000013528 metallic particle Substances 0.000 claims description 12
- 230000002000 scavenging effect Effects 0.000 claims description 12
- 238000004065 wastewater treatment Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 150000002739 metals Chemical class 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000011084 recovery Methods 0.000 abstract description 5
- 230000007062 hydrolysis Effects 0.000 abstract description 2
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention relates to the technical field of separation of indium, in particular to a method for separating indium from cadmium slag. The specific operation comprises the following steps: washing, acid dissolution, replacement and impurity removal, replacement and electrolysis. Residual indium contained in the cadmium slag is separated from cadmium by using the hydrolysis difference between indium and cadmium; the recovery rate of indium is greater than 98%; the removal rate of cadmium reaches 90%; the method has the characteristics of low production cost, simple technological process and short production cycle; the environmental pollution of the cadmium slag is reduced; the potential safety hazard is reduced; and the method is suitable for popularization and application in wide metallurgical enterprises.
Description
Technical field
The present invention relates to a kind of separation technology field of indium, be specifically related to a kind of method of separating indium from cadmium slag.
Background technology
Removing in the smelting technology of cadmium from indium, the thick indium obtained and smart indium, except after cadmium, still contain the indium of about 20% in the cadmium slag of gained.Some enterprise can take to be taked by cadmium slag to stack process, and this treatment process has great environmental safety hidden danger and takies and waste place resource; Or cadmium slag is adopted and returns extract technology and again leach, but this method has that production cost is high, technical process and the defect such as the production cycle rate of recovery that is long and indium is low.
Therefore, how the indium in cadmium slag is extracted efficiently, separated by cadmium, to improve the rate of recovery of indium and to avoid remaining cadmium slag to cause secondary pollution, minimizing potential safety hazard, reduction production cost, shortened process and production cycle become the previous difficult problem urgently needing solution badly of order simultaneously.
Summary of the invention
For the defect of prior art, the invention provides a kind of method of separating indium from cadmium slag, can reduce cadmium slag to the pollution of environment, reduce potential safety hazard, and there is the rate of recovery that can improve indium, the feature that production cost is low, technical process is simple and with short production cycle.
Technical scheme of the present invention is:
A method for separating indium from cadmium slag, comprises following washing, acid-soluble, displacement removal of impurities, displacement and electrolysis step:
1 washing:
A. will be soaked in water containing indium cadmium slag, the mass ratio containing indium cadmium slag and water is 1:2 ~ 4, soaks 24 ~ 48 hours; Putting into rotating speed is that the stirrer of 60 ~ 120 revs/min stirs, and stirs 5 ~ 10 minutes; The indium cadmium slag water that contains after stirring is cleaned 3 times, each 8 ~ 12 minutes; Sieve; Obtain metallic particles, scavenging solution and pureed cadmium slag respectively;
B. the metallic particles of above step a gained is returned removal of impurities to purify, obtain elemental metals indium grain;
C. being neutralized to PH5.5 by adding sodium hydroxide in the scavenging solution of above step a gained, filtering, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
D. the pureed cadmium slag of above step a gained is added concentration be 31% hydrochloric acid dissolve, and the mass ratio of pureed cadmium slag and hydrochloric acid is 1:2; Add sodium hydroxide again and be neutralized to PH5.5, filter, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
2 is acid-soluble: by above step 1 gained containing the slag of indium hydroxide add concentration be 31% hydrochloric acid dissolve, the mass ratio of slag and hydrochloric acid is 1:2;
3 displacement removal of impurities: the acid-soluble rear employing aluminium sheet of slag that above step 2 contains indium hydroxide is carried out displacement removal of impurities;
4 displacements: above step 3 is replaced the solution after removal of impurities and adopt aluminium sheet to replace, obtain thick indium;
5 electrolysis: thick indium is carried out electrolysis removal of impurities purification, obtain smart indium.
Beneficial effect of the present invention is:
The present invention utilizes the difference of indium and cadmium hydrolysis, from containing indium cadmium slag, remaining indium contained by it is separated with cadmium, the rate of recovery of indium is made to be greater than 98%, the clearance of cadmium reaches 90%, and have the advantages that production cost is low, technical process is simple and with short production cycle, more can reduce the pollution of cadmium slag to environment, reduce potential safety hazard, the method is adapted at promoting the use of in vast smelter.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
The invention provides a kind of method of separating indium from cadmium slag, as shown in Figure 1, comprise following washing, acid-soluble, displacement removal of impurities, displacement and electrolysis step:
1 washing:
A. will be soaked in water containing indium cadmium slag, the mass ratio containing indium cadmium slag and water is 1:2 ~ 4, soaks 24 ~ 48 hours; Putting into rotating speed is that the stirrer of 60 ~ 120 revs/min stirs, and stirs 5 ~ 10 minutes; The indium cadmium slag water that contains after stirring is cleaned 3 times, each 8 ~ 12 minutes; Sieve; Obtain metallic particles, scavenging solution and pureed cadmium slag respectively;
B. the metallic particles of above step a gained is returned removal of impurities to purify, obtain elemental metals indium grain;
C. being neutralized to PH5.5 by adding sodium hydroxide in the scavenging solution of above step a gained, filtering, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
D. the pureed cadmium slag of above step a gained is added concentration be 31% hydrochloric acid dissolve, and the mass ratio of pureed cadmium slag and hydrochloric acid is 1:2; Add sodium hydroxide again and be neutralized to PH5.5, filter, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
2 is acid-soluble: by above step 1 gained containing the slag of indium hydroxide add concentration be 31% hydrochloric acid dissolve, the mass ratio of slag and hydrochloric acid is 1:2;
3 displacement removal of impurities: the acid-soluble rear employing aluminium sheet of slag that above step 2 contains indium hydroxide is carried out displacement removal of impurities;
4 displacements: above step 3 is replaced the solution after removal of impurities and adopt aluminium sheet to replace, obtain thick indium;
5 electrolysis: thick indium is carried out electrolysis removal of impurities purification, obtain smart indium.
Embodiment 1:
The method of the present invention's separating indium from cadmium slag, comprises following washing, acid-soluble, displacement removal of impurities, displacement and electrolysis step:
1 washing:
A. will be soaked in water containing indium cadmium slag, the mass ratio containing indium cadmium slag and water is 1:2, soaks 24 hours; Putting into rotating speed is that the stirrer of 60 revs/min stirs, and stirs 10 minutes; The indium cadmium slag water that contains after stirring is cleaned 3 times, each 10 minutes; Sieve; Obtain metallic particles, scavenging solution and pureed cadmium slag respectively;
B. the metallic particles of above step a gained is returned removal of impurities to purify, obtain elemental metals indium grain;
C. being neutralized to PH5.5 by adding sodium hydroxide in the scavenging solution of above step a gained, filtering, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
D. the pureed cadmium slag of above step a gained is added concentration be 31% hydrochloric acid dissolve, and the mass ratio of pureed cadmium slag and hydrochloric acid is 1:2; Add sodium hydroxide again and be neutralized to PH5.5, filter, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
2 is acid-soluble: by above step 1 gained containing the slag of indium hydroxide add concentration be 31% hydrochloric acid dissolve, the mass ratio of slag and hydrochloric acid is 1:2;
3 displacement removal of impurities: the acid-soluble rear employing aluminium sheet of slag that above step 2 contains indium hydroxide is carried out displacement removal of impurities;
4 displacements: above step 3 is replaced the solution after removal of impurities and adopt aluminium sheet to replace, obtain thick indium;
5 electrolysis: thick indium is carried out electrolysis removal of impurities purification, obtain smart indium.
Embodiment 2:
The method of the present invention's separating indium from cadmium slag, comprises following washing, acid-soluble, displacement removal of impurities, displacement and electrolysis step:
1 washing:
A. will be soaked in water containing indium cadmium slag, the mass ratio containing indium cadmium slag and water is 1:3, soaks 36 hours; Putting into rotating speed is that the stirrer of 90 revs/min stirs, and stirs 5 minutes; The indium cadmium slag water that contains after stirring is cleaned 3 times, each 8 minutes; Sieve; Obtain metallic particles, scavenging solution and pureed cadmium slag respectively;
B. the metallic particles of above step a gained is returned removal of impurities to purify, obtain elemental metals indium grain;
C. being neutralized to PH5.5 by adding sodium hydroxide in the scavenging solution of above step a gained, filtering, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
D. the pureed cadmium slag of above step a gained is added concentration be 31% hydrochloric acid dissolve, and the mass ratio of pureed cadmium slag and hydrochloric acid is 1:2; Add sodium hydroxide again and be neutralized to PH5.5, filter, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
2 is acid-soluble: by above step 1 gained containing the slag of indium hydroxide add concentration be 31% hydrochloric acid dissolve, the mass ratio of slag and hydrochloric acid is 1:2;
3 displacement removal of impurities: the acid-soluble rear employing aluminium sheet of slag that above step 2 contains indium hydroxide is carried out displacement removal of impurities;
4 displacements: above step 3 is replaced the solution after removal of impurities and adopt aluminium sheet to replace, obtain thick indium;
5 electrolysis: thick indium is carried out electrolysis removal of impurities purification, obtain smart indium.
Embodiment 3:
The method of the present invention's separating indium from cadmium slag, comprises following washing, acid-soluble, displacement removal of impurities, displacement and electrolysis step:
1 washing:
A. will be soaked in water containing indium cadmium slag, the mass ratio containing indium cadmium slag and water is 1:4, soaks 48 hours; Putting into rotating speed is that the stirrer of 120 revs/min stirs, and stirs 8 minutes; The indium cadmium slag water that contains after stirring is cleaned 3 times, each 12 minutes; Sieve; Obtain metallic particles, scavenging solution and pureed cadmium slag respectively;
B. the metallic particles of above step a gained is returned removal of impurities to purify, obtain elemental metals indium grain;
C. being neutralized to PH5.5 by adding sodium hydroxide in the scavenging solution of above step a gained, filtering, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
D. the pureed cadmium slag of above step a gained is added concentration be 31% hydrochloric acid dissolve, and the mass ratio of pureed cadmium slag and hydrochloric acid is 1:2; Add sodium hydroxide again and be neutralized to PH5.5, filter, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
2 is acid-soluble: by above step 1 gained containing the slag of indium hydroxide add concentration be 31% hydrochloric acid dissolve, the mass ratio of slag and hydrochloric acid is 1:2;
3 displacement removal of impurities: the acid-soluble rear employing aluminium sheet of slag that above step 2 contains indium hydroxide is carried out displacement removal of impurities;
4 displacements: above step 3 is replaced the solution after removal of impurities and adopt aluminium sheet to replace, obtain thick indium;
5 electrolysis: thick indium is carried out electrolysis removal of impurities purification, obtain smart indium.
Claims (1)
1. the method for separating indium from cadmium slag, is characterized in that, comprises following washing, acid-soluble, displacement removal of impurities, displacement and electrolysis step:
1) wash:
A. will be soaked in water containing indium cadmium slag, the mass ratio containing indium cadmium slag and water is 1:2 ~ 4, soaks 24 ~ 48 hours; Putting into rotating speed is that the stirrer of 60 ~ 120 revs/min stirs, and stirs 5 ~ 10 minutes; The indium cadmium slag water that contains after stirring is cleaned 3 times, each 8 ~ 12 minutes; Sieve; Obtain metallic particles, scavenging solution and pureed cadmium slag respectively;
B. the metallic particles of above step a gained is returned removal of impurities to purify, obtain elemental metals indium grain;
C. being neutralized to PH5.5 by adding sodium hydroxide in the scavenging solution of above step a gained, filtering, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
D. the pureed cadmium slag of above step a gained is added concentration be 31% hydrochloric acid dissolve, and the mass ratio of pureed cadmium slag and hydrochloric acid is 1:2; Add sodium hydroxide again and be neutralized to PH5.5, filter, obtain the slag containing indium hydroxide, surplus solution does wastewater treatment;
2) acid-soluble: by above step 1) gained containing the slag of indium hydroxide add concentration be 31% hydrochloric acid dissolve, the mass ratio of slag and hydrochloric acid is 1:2;
3) removal of impurities is replaced: by above step 2) carry out displacement removal of impurities containing the acid-soluble rear employing aluminium sheet of slag of indium hydroxide;
4) replace: by above step 3) displacement removal of impurities after solution adopt aluminium sheet replace, obtain thick indium;
5) electrolysis: thick indium is carried out electrolysis removal of impurities purification, obtain smart indium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510083522.7A CN104651622A (en) | 2015-02-16 | 2015-02-16 | Method for separating indium from cadmium slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510083522.7A CN104651622A (en) | 2015-02-16 | 2015-02-16 | Method for separating indium from cadmium slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104651622A true CN104651622A (en) | 2015-05-27 |
Family
ID=53243258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510083522.7A Pending CN104651622A (en) | 2015-02-16 | 2015-02-16 | Method for separating indium from cadmium slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104651622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113337713A (en) * | 2021-05-11 | 2021-09-03 | 湖南博一环保科技有限公司 | Method for recovering zinc, lead, indium, cadmium and bismuth from zinc-containing wastewater |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255502A (en) * | 2008-04-02 | 2008-09-03 | 河南豫光金铅股份有限公司 | Process for comprehensive recovery of indium, cadmium, thallium and zinc from lead system smoke |
| JP2009242911A (en) * | 2008-03-31 | 2009-10-22 | Dowa Metals & Mining Co Ltd | Method for producing indium metal |
| CN101701292A (en) * | 2009-10-20 | 2010-05-05 | 南京中锗科技股份有限公司 | Method for recovering indium and tin from ITO waste targets by utilizing oxidation method |
| CN101831550A (en) * | 2010-05-21 | 2010-09-15 | 葫芦岛锌业股份有限公司 | Method for extracting indium from alkali oxidation scum rich in indium |
| CN102560123A (en) * | 2012-02-22 | 2012-07-11 | 郴州丰越环保科技有限公司 | Method for utilization and harmless treatment of multi-metal material containing arsenic and indium |
| CN103290212A (en) * | 2012-02-24 | 2013-09-11 | 于军 | Clean smelting method of indium |
-
2015
- 2015-02-16 CN CN201510083522.7A patent/CN104651622A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009242911A (en) * | 2008-03-31 | 2009-10-22 | Dowa Metals & Mining Co Ltd | Method for producing indium metal |
| CN101255502A (en) * | 2008-04-02 | 2008-09-03 | 河南豫光金铅股份有限公司 | Process for comprehensive recovery of indium, cadmium, thallium and zinc from lead system smoke |
| CN101701292A (en) * | 2009-10-20 | 2010-05-05 | 南京中锗科技股份有限公司 | Method for recovering indium and tin from ITO waste targets by utilizing oxidation method |
| CN101831550A (en) * | 2010-05-21 | 2010-09-15 | 葫芦岛锌业股份有限公司 | Method for extracting indium from alkali oxidation scum rich in indium |
| CN102560123A (en) * | 2012-02-22 | 2012-07-11 | 郴州丰越环保科技有限公司 | Method for utilization and harmless treatment of multi-metal material containing arsenic and indium |
| CN103290212A (en) * | 2012-02-24 | 2013-09-11 | 于军 | Clean smelting method of indium |
Non-Patent Citations (1)
| Title |
|---|
| 刘大春: ""从含锌铟复杂物料中提取金属铟新工艺的研究"", 《中国博士学位论文全文数据库（电子期刊）工程科技Ⅰ辑》, no. 1, 15 January 2012 (2012-01-15), pages 80 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113337713A (en) * | 2021-05-11 | 2021-09-03 | 湖南博一环保科技有限公司 | Method for recovering zinc, lead, indium, cadmium and bismuth from zinc-containing wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103397213B (en) | Method for decomposing and extracting Baotou rare earth ore through mixed alkali roasting process | |
| CN102260795A (en) | Method for directly producing electrolytic nickel by using copper nickel renewable resources | |
| CN101743332B (en) | Process for producing pure metallic indium from zinc oxide and/or solution containing the metal | |
| CN103966446A (en) | Method for separating and recovering copper, nickel and iron from electroplating sludge | |
| CN104451186A (en) | Method for extracting refined gold from palladium-silver-containing anode mud | |
| CN105112669A (en) | Comprehensive recovery method for platinum and palladium in silver anode slime | |
| CN103924085A (en) | Method for recovering copper zinc nickel from heavy metal sludge by using copper smelting waste acid | |
| CN103866125A (en) | Method for removing fluorine chlorine of zinc ash material by alkali washing extracting combined process | |
| CN105087935A (en) | Method for recycling copper, indium and gallium from waste copper-indium-gallium target | |
| CN103572064B (en) | Method for enriching lead and recovering rare earth from rare earth lead slag | |
| CN102321815A (en) | Method for extracting indium from indium-containing zinc oxide | |
| CN105907986B (en) | The extracting method of lead in a kind of silver separating residues | |
| CN102978411B (en) | Comprehensive recycling method for crude indium casting slag | |
| CN104032131B (en) | Method for processing high-tin anode slurry | |
| CN103074497A (en) | Method for recovering silver from waste film | |
| CN103526023B (en) | Method for regenerating scrapped palladium extraction agent and recycling platinum group metal | |
| CN106282588A (en) | Alkali regeneration method in reviver refine alkaline residue | |
| CN102399986A (en) | Method for recovering zinc from liquid obtained after extraction and copper extraction of zinc-containing copper gold concentrate by roasting and acid leaching | |
| CN104651622A (en) | Method for separating indium from cadmium slag | |
| CN107674976B (en) | Method for separating and recovering cobalt and manganese in low-cobalt high-manganese waste by using ammonia-ammonium bicarbonate | |
| CN103966628A (en) | Treatment technology of copper leached solution | |
| CN102586622A (en) | Method for producing electrolytic zinc by comprehensively recycling high-chlorine high-fluorine lead and antimony smelting waste residue | |
| CN105112693A (en) | Method for pressure leaching of rhenium in rhenium-rich slag | |
| CN104975184A (en) | Method for recovering gold and silver from picking waste liquid | |
| CN108330301A (en) | Bastnaesite smelts the processing method of three-phase emulsion in separation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
|
| WD01 | Invention patent application deemed withdrawn after publication |