CN101792868A - Method for recycling gallium from gallium-bearing fly ash in Yili of Xinjiang - Google Patents
Method for recycling gallium from gallium-bearing fly ash in Yili of Xinjiang Download PDFInfo
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- CN101792868A CN101792868A CN200910117641A CN200910117641A CN101792868A CN 101792868 A CN101792868 A CN 101792868A CN 200910117641 A CN200910117641 A CN 200910117641A CN 200910117641 A CN200910117641 A CN 200910117641A CN 101792868 A CN101792868 A CN 101792868A
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- gallium
- fly ash
- flyash
- xinjiang
- electrolysis
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- 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
Abstract
The invention relates to a method for recycling gallium from gallium-bearing fly ash in Yili of Xinjiang, which is characterized by grinding the gallium-bearing fly ash into fine powder, adding water into the fine powder for precipitation separation, adding excessive acid into the separated precipitates, fully stirring the excessive acid and the separated precipitates to react and then separating the reactants, using the obtained saturated solution as the electrolyte for electrolysis, separating the cathode products obtained by electrolysis step by step and collecting gallium. In the method, the gallium-bearing fly ash is ground and washed to remove the light substances, then the excessive acid is added into the precipitates to react to obtain the saturated electrolyte and finally the gallium is obtained through electrolytic separation. The method is simple in process, low in cost and high in yield. By the method, the gallium with high added value is extracted from the gallium-bearing fly ash, thus realizing recycle of the used resources, gaining good economic benefits, greatly improving the added value of the used resources and simultaneously widening the source range of the rare metal gallium.
Description
Technical field
The invention belongs to waste and old resource reutilization technical field, particularly relate to and a kind ofly contain the gallium flyash method that reclaims gallium from Xinjiang Yi Li.
Background technology
Flyash is the solid waste residue that the coal-burning power plant discharges, and in recent years, along with developing rapidly of power industry, the flyash total amount of the annual discharging in coal-burning power plant increases year by year.As one of bigger industrial residue of the current discharge capacity of China, present stage the year bed drain purge of China's flyash reached 3,000 ten thousand tons, this causes huge pressure for the development of the national economy and ecotope of China.Therefore, with flyash turn waste into wealth, turning bane into boon fully utilizes, and has become important techniques economic policy in China's economic construction, be to solve China's electrical production environmental pollution, the important means of contradiction between the resource shortage also is one of task of solution that electrical production faces.
Chemical analysis shows, in the flyash except principal element silicon, aluminium, oxygen, iron, also contain calcium, magnesium, potassium, sodium, sulphur, vanadium, titanium etc., even also contain some rare metallic element galliums, uranium etc., especially the yttrium gallium that contains in the flyash of Ili Prefecture, Xinjiang, uranium etc. are more.
At present, flyash is widely used in all departments such as building worker, building materials, water conservancy.But these utilizations only are a kind of low-level utility values, often are difficult to obtain good economic benefit.And, because the existence of radioelement will certainly damage human body, at present, have and use the carcinogenic report of these building materials.Therefore, the rare metal that will have high added value extracts from flyash, not only can avoid the injury to the people, obtains good economic benefit, improves the added value of waste and old resource greatly, also can widen the raw material sources of rare metal simultaneously.
Summary of the invention
Purpose of the present invention just is to provide a kind of waste and old resource that makes full use of, and improves the added value of waste and old resource, and that increases economic efficiency contains the method that reclaims gallium the gallium flyash from Xinjiang Yi Li.
The present invention is achieved through the following technical solutions:
A kind ofly contain the gallium flyash method that reclaims gallium from Xinjiang Yi Li, it is characterized in that to contain gallium flyash and grind to form micro mist, aqueous precipitation separates, throw out after the separation separates after adding the abundant stirring reaction of excess acid, with the gained saturated solution is the electrolytic solution electrolysis, electrolysis gained cathode product is separated step by step, collect gallium;
The above-mentioned mesh-of-grind that contains gallium flyash is below 200 orders;
Above-mentioned acid is the vitriol oil or concentrated hydrochloric acid.
Of the present inventionly contain the gallium flyash that the method that reclaims gallium is ground by containing gallium flyash, after washing removes the lightweight thing, add the excess acid reaction and become saturated electrolytic solution from Xinjiang Yi Li, obtain gallium by electrolytic separation at last, this method technology is simple, and cost is low.The composition gallium that method of the present invention will have high added value extracts from flyash, has realized the utilization again of waste and old resource, has obtained good economic benefit, has improved the added value of waste and old resource greatly, has also widened the raw material sources of rare metal gallium simultaneously.
Embodiment
The present invention contains the method specific embodiment that reclaims gallium the gallium flyash from Xinjiang Yi Li:
1. contain the pre-treatment of gallium flyash
To contain gallium flyash and grind to form fineness, and add enough water then and carry out precipitate and separate, remove the lightweight thing, the collecting precipitation thing less than 200 purpose micro mists.The processing of this process is because required gallium compound density is far longer than the density of water, but by the unnecessary material in water precipitation separation place to go, reduces the subsequent disposal difficulty.
2. the preparation of electrolytic solution
Add strong acid such as the excessive vitriol oil or concentrated hydrochloric acid in the throw out of above-mentioned gained, fully the metallic element that stirs in the metallic compound that can participate in reaction that makes in the throw out becomes dissociated ion, becomes U as uranium, gallium etc.
4+, Ga
3+Filter out the throw out of failing to react, finally obtain saturated solution.
3. electrolysis
Make negative electrode with copper coin, iron plate is made anode, and above-mentioned saturated solution is an electrolytic solution, and electrolysis is carried out in energising in electrolytic solution, and this electrolysis process is conventional electrolysis process, as the most frequently used C ucl
2Electrolysis process.Electrolysis when electrolyte ion concentration is primary 10% till, collect the material that is enriched in negative electrode.
4. separate step by step
Because the metal mobility difference of metallic cation, so they go out to the cathode junction partial crystallization gradually according to from weak to strong order, show that negative electrode is exactly a multilayered state, to peel off step by step, collection gallium layer gets final product.
Claims (3)
1. one kind contains the gallium flyash method that reclaims gallium from Xinjiang Yi Li, it is characterized in that to contain gallium flyash and grind to form micro mist, aqueous precipitation separates, throw out after the separation separates after adding the abundant stirring reaction of excess acid, with the gained saturated solution is the electrolytic solution electrolysis, electrolysis gained cathode product is separated step by step, collect gallium.
2. contain the method that reclaims gallium the gallium flyash according to claim 1 is described from Xinjiang Yi Li, it is characterized in that: the mesh-of-grind of above-mentioned flyash is below 200 orders.
3. contain the method that reclaims gallium the gallium flyash according to claim 1 is described from Xinjiang Yi Li, it is characterized in that: above-mentioned acid is the vitriol oil or concentrated hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910117641A CN101792868A (en) | 2009-12-07 | 2009-12-07 | Method for recycling gallium from gallium-bearing fly ash in Yili of Xinjiang |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910117641A CN101792868A (en) | 2009-12-07 | 2009-12-07 | Method for recycling gallium from gallium-bearing fly ash in Yili of Xinjiang |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101792868A true CN101792868A (en) | 2010-08-04 |
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ID=42585782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910117641A Pending CN101792868A (en) | 2009-12-07 | 2009-12-07 | Method for recycling gallium from gallium-bearing fly ash in Yili of Xinjiang |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101792868A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956085A (en) * | 2010-08-25 | 2011-01-26 | 中国地质科学院矿产综合利用研究所 | Method for extracting gallium chloride from carbonaceous mudstone |
| WO2012171481A1 (en) * | 2011-06-15 | 2012-12-20 | Wang Jun | Hydrometallurgical process for complete and comprehensive recovery with substantially no wastes and zero emissions |
| CN103071595A (en) * | 2012-12-31 | 2013-05-01 | 西部矿业集团有限公司 | Flotation method for gallium in fly ash |
-
2009
- 2009-12-07 CN CN200910117641A patent/CN101792868A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956085A (en) * | 2010-08-25 | 2011-01-26 | 中国地质科学院矿产综合利用研究所 | Method for extracting gallium chloride from carbonaceous mudstone |
| CN101956085B (en) * | 2010-08-25 | 2011-12-28 | 中国地质科学院矿产综合利用研究所 | Method for extracting gallium chloride from carbonaceous mudstone |
| WO2012171481A1 (en) * | 2011-06-15 | 2012-12-20 | Wang Jun | Hydrometallurgical process for complete and comprehensive recovery with substantially no wastes and zero emissions |
| CN103071595A (en) * | 2012-12-31 | 2013-05-01 | 西部矿业集团有限公司 | Flotation method for gallium in fly ash |
| CN103071595B (en) * | 2012-12-31 | 2016-08-03 | 西部矿业股份有限公司 | A kind of method of flotation gallium in flyash |
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Open date: 20100804 |