CN1031255A - The thiocarbamide iron leaching process is carried metal working industry new process of production - Google Patents
The thiocarbamide iron leaching process is carried metal working industry new process of production Download PDFInfo
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- CN1031255A CN1031255A CN88102653A CN88102653A CN1031255A CN 1031255 A CN1031255 A CN 1031255A CN 88102653 A CN88102653 A CN 88102653A CN 88102653 A CN88102653 A CN 88102653A CN 1031255 A CN1031255 A CN 1031255A
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- gold
- thiocarbamide
- iron
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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
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Abstract
Thiocarbamide iron leaching process of the present invention is carried metal working industry new process of production and is belonged to technical field of wet metallurgy, belongs to precious metal especially and extracts the field.This technology has to soak to put and need not solid-liquid separation synchronously, with iron direct characteristics of extraction gold mud in leaching process.Gold mud obtains to contain the gold containing material of gold more than 90% through pyrometallurgical smelting.This technology is applicable to the difficult gold containing ore of cupric, arsenic, antimony, carbon and high-sulfur, and particularly the exploitation to water system prosperity, densely populated regional gold ore resource has suitability and social benefit.
Description
The present invention carries metal working industry new process of production for the thiocarbamide iron leaching process and belongs to technical field of wet metallurgy, belongs to precious metal especially and extracts the field.
At present the traditional technology that adopts wet method to extract gold from contain golden sulphur concentrate is to extract with cyanide process, and this technology toxicity is bigger, and technology is numerous and diverse, and particularly the subsequent technique equipment that is used for sewage disposal costs bigger.Simultaneously, be difficult for element that cyaniding handles such as arsenic, antimony, its poor effect of bismuth for containing in the raw material, since nearly half a century, extracting gold from thiocarbamide causes the attention of countries in the world.For example: No. 4145212 patents of the U.S. have been introduced the heating extract technology, add oxygenant in leaching process, thiourea concentration 20 grams per liter solution.The U.S. No. 4342591 patents have been introduced the technology that reclaims gold and silver in the sulphide ores or bismuth, need carry out reducing roasting and oxidizing roasting, use acidleach earlier, and then leach with thiocarbamide, thiourea concentration 10～50 grams per liter solution, and in leaching process, add reductive agent sulfurous gas.No. 4561947 patents of the U.S. have been introduced the technology that reclaims precious metal with the thiocarbamide method from ore, add Oxidizing and Reducing Agents in the leaching process simultaneously, thiourea concentration 30 grams per liter solution.The common drawback that above-mentioned technology exists is: complex process (soak, put separately), need to add Oxidizing and Reducing Agents, the thiocarbamide consumption is big, so processing unit expense and processing cost are very high.
The gold extraction technology that the objective of the invention is to seek a kind of not only economy but also have greater efficiency is simplified flow process, reduces the thiocarbamide consumption, makes thiourea gold extraction technology be widely used in the gold wet method and extracts the field.
Technical characterictic of the present invention is as follows:
1. leach, replace and in same groove, carry out, do not need solid-liquid separation.
2. initial material is a gold floatation concentrate, uses hydroclone classification after being finely ground to-320 orders 85～90%, and the classification overflow enters leaching, exchange system.Leaching liquid-solid ratio is 2: 1.
3. under low thiourea concentration, dissolve precious metal, thiourea concentration 2～4 grams per liter solution.Sulfuric acid concentration 30～50 grams per liter solution, pH value is 1～1.5.
4. leach at normal temperatures and displacement 32～40 hours.Directly extract gold mud with iron from ore pulp, iron can generate oxygenant in ore pulp, and redox-potential reaches 250～300 millivolts (silver/silver chloride electrode is a reference electrode).Need not add Oxidizing and Reducing Agents separately.Scraped every 2 hours and to wash gold mud one time.
The present invention has the characteristics of putting synchronously, not needing the solid-liquid separatory, finish drilling and do at low thiourea concentration of soaking.And flow process Cheng Dan, leaching process need not add Oxidizing and Reducing Agents, has saved the thickening process after leaching, and is easy to operate.Contain at feed material under the condition of gold 31.77 gram/tons, gold leaching rate 88.42%, rate of displacement 99.00%, smelting recovery 96.14%, total yield 84.16%, gold mud is through pyrometallurgical smelting finished product gold grade 85～95%.This technology is applicable to the difficult gold containing ore of cupric, arsenic, antimony, carbon and high-sulfur, and particularly the exploitation to water system prosperity, densely populated areas gold ore resource has suitability and social benefit.
Embodiment:
To be gold containing ore contain golden sulfide concentrate through what floating and enriching obtained to initial material, contains gold 31.77 gram/tons, silver-colored 42 gram/tons, copper 0.278%, lead 0.773%, zinc 0.078%, iron 28.52%, sulphur 29.30%, carbon 1.31%, arsenic 0.12%.Initial material is used hydroclone classification after being finely ground to-320 orders 85～90%.Thick rank is returned grinding system, and the classification overflow enters leaching, exchange system, and liquid-solid ratio is 2: 1.Add sulfuric acid 30～50 grams per liters, pH value 1～1.5 adds thiocarbamide 2 grams per liters (being equivalent to 4 kg/ton ores).Add solid iron then, stir to soak and put, leached time swap 32 hours.Iron displacement 250 millivolts of reduction potentials (silver/silver chloride electrode is a reference electrode).Propose solid iron every two hours, scrape with mechanical means and get the gold mud that is deposited on the iron, obtain grade of gold mud 15～20%, 10 tons of day outputs.Soak and put the direct discharge of the ore pulp that finishes as discarded tailing, gold mud obtains gold containing material through pyrometallurgical smelting.Obtain following production and technical indication: gold leaching rate 90%, silver leaching rate 80%, gold displacement reduction ratio 99.5%, the pyrogenic process rate of recovery 98.5%, gold containing material quality 93.5%.
Claims (4)
1, the thiocarbamide iron leaching process is put forward the feature of metal working industry new process of production and is: leach and carry out synchronously with the iron displacement with thiocarbamide.
2, thiocarbamide iron leaching process as claimed in claim 1 is carried metal working industry new process of production and be it is characterized in that: the extract material granularity be-320 orders 85～90%, and the leaching liquid-solid ratio is 2: 1.
3, thiocarbamide iron leaching process as claimed in claim 1 is carried metal working industry new process of production and be it is characterized in that: sulfuric acid concentration 30～50 grams per liter solution, pH value 1～1.5, thiourea concentration 2～4 grams per liter solution.
4, thiocarbamide iron leaching process as claimed in claim 1 is carried metal working industry new process of production and be it is characterized in that: leach and carry out at normal temperatures, and extraction time 32～40 hours, iron displacement reduction potential is 250～300 millivolts (they are reference electrode with silver/silver chloride electrode).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88102653A CN1013207B (en) | 1988-05-10 | 1988-05-10 | Technology for industrial extracting gold by thiocarbamide-iron leaching process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88102653A CN1013207B (en) | 1988-05-10 | 1988-05-10 | Technology for industrial extracting gold by thiocarbamide-iron leaching process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031255A true CN1031255A (en) | 1989-02-22 |
| CN1013207B CN1013207B (en) | 1991-07-17 |
Family
ID=4832243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88102653A Expired CN1013207B (en) | 1988-05-10 | 1988-05-10 | Technology for industrial extracting gold by thiocarbamide-iron leaching process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013207B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107586953A (en) * | 2017-08-25 | 2018-01-16 | 金川集团股份有限公司 | A kind of method of concentration of precious metal |
| CN109022775A (en) * | 2018-06-27 | 2018-12-18 | 昆明理工大学 | A kind of high-speed rail Gold Concentrate under Normal Pressure acid thiourea extract technology |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334236C (en) * | 2006-03-14 | 2007-08-29 | 吉林大学 | Comprehensive recovery for bullion ore with various metals |
-
1988
- 1988-05-10 CN CN88102653A patent/CN1013207B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107586953A (en) * | 2017-08-25 | 2018-01-16 | 金川集团股份有限公司 | A kind of method of concentration of precious metal |
| CN107586953B (en) * | 2017-08-25 | 2019-04-26 | 金川集团股份有限公司 | A kind of method of concentration of precious metal |
| CN109022775A (en) * | 2018-06-27 | 2018-12-18 | 昆明理工大学 | A kind of high-speed rail Gold Concentrate under Normal Pressure acid thiourea extract technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1013207B (en) | 1991-07-17 |
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