CN103194598A - Method for improving recovery rate of gold ore difficult to treat by adopting sulfuric acid leaching reduction process - Google Patents
Method for improving recovery rate of gold ore difficult to treat by adopting sulfuric acid leaching reduction process Download PDFInfo
- Publication number
- CN103194598A CN103194598A CN2013101367051A CN201310136705A CN103194598A CN 103194598 A CN103194598 A CN 103194598A CN 2013101367051 A CN2013101367051 A CN 2013101367051A CN 201310136705 A CN201310136705 A CN 201310136705A CN 103194598 A CN103194598 A CN 103194598A
- Authority
- CN
- China
- Prior art keywords
- sulfuric acid
- gold
- acidolysis reaction
- leach
- difficult
- 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
Images
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)
Abstract
The invention discloses a method for improving the recovery rate of a gold ore difficult to treat by adopting a sulfuric acid leaching reduction process. The method is characterized by comprising the following steps of: carrying out slurry mixing on roasted sand which is formed by carrying out two-stage calcinations on an ore containing gold; putting the roasted sand subjected to slurry mixing into an acidolysis reaction tank; adding concentrated sulfuric acid of which the concentration is 98% into the acidolysis reaction tank until the concentration of the concentrated sulfuric acid is 67-70%; after the reaction is finished, adding water into the acidolysis reaction tank to carry out leaching; then adding iron sheets into the acidolysis reaction tank to reduce high-valence iron; after a reduction reaction, delivering the substances in the acidolysis reaction tank to a thickener to carry out settlement concentration; filtering and washing underflow ore slurry after the settlement concentration; putting filter cakes after washing into a neutralizing tank, and neutralizing by using alkali lye; and putting the slurry after neutralizing into a cyanide chemical section to recover gold and silver.
Description
Technical field
The present invention relates to a kind of method that improves golden roasted ore recovery of gold and silver, particularly a kind of method that improves the difficult-treating gold mine recovery of gold and silver.
Background technology
China's gold is through for many years overexploitation, it is day by day exhausted easily to handle resource, and refractory ore reserves such as arsenic bearing-carbon bearing are relatively large, and from the trend of world's gold and the variation of domestic gold reserve, handling the difficult smelting ore deposit of selecting will be that the gold industry development arrives only way to a certain degree.
The treatment process in indissoluble gold ore deposit mainly contains three kinds at present: microorganism is leached, hot-pressure oxidation leaches and roasting is leached.
It is the technological process of utilizing certain component in the oxygenizement selective dissolution ore of microorganism (bacterium) that microorganism is leached, and both can be used for extracting metal, also can be used for removing the harmful interference component in the ore.But valuable metal content such as sulphur content and copper are lower in this kind method requirement ore, otherwise can produce a large amount of vitriol and diluted acid in producing, and not only sulphur, copper, arsenic etc. can't reclaim, and also will produce a large amount of slags with a large amount of lime neutralizations.From several enterprises of having put into production, comprehensive recovery and economic benefit are unsatisfactory.
It is exactly to increase valuable metal or the solubleness of poisonous metal in leaching agent by improving temperature and logical oxygen that hot-pressure oxidation leaches, thereby accelerates to leach the process of reaction.This method makes that sulfide and arsenic compound are oxidized to sulfuric acid and arsenate in the indissoluble gold ore deposit, goldc grains is come out be convenient to cyaniding to leach.But the needed pressure and temperature of hot-pressure oxidation lixiviation process is higher, and equipment and materials, mechanical workout, self-service instrument and control, operative technique level are all had higher requirements.This method is used widely in China's metallurgy of nickel industry at present, but still is in conceptual phase in the gold smelting industry.
Roasting method is in suitable atmosphere and is lower than under the raw mineral materials melting temperature, makes component generation physics in the raw mineral materials and the technological process of chemical transformation.Generally adopt two-stage calcination for containing arsenic indissoluble gold ore deposit.
Leach through the calcining cyaniding that forms behind the two-stage calcination in the existing arsenic indissoluble gold ore deposit that contains, and with the increase of sodium cyanide consumption, gold leaching rate also increases thereupon, and when the sodium cyanide consumption reached 950g/t, gold leaching rate reached 84.61%; Still there is the low problem of gold recovery, causes low being of its rate of recovery to contain golden calcining ore deposit surface attachment Fe through discovering
2O
3The problem that makes the gold in the calcining ore deposit be difficult to be extracted, existing technology also has further improved space to the recovery of its auxiliary product simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of method that can further improve gold and silver and the auxiliary product rate of recovery in the difficult-treating gold mine is provided, can overcomes the deficiencies in the prior art.
Technical scheme of the present invention is: adopt the sulfuric acid to leach reducing process to improve the method for the difficult-treating gold mine rate of recovery, the calcining that forms behind the gold containing ore two-stage calcination is sized mixing, after sizing mixing, send into the acidolysis reaction groove, add 98% the vitriol oil until diluting concentrated sulfuric acid to 67～70% to the acidolysis reaction groove, after reaction finishes, add water in the acidolysis reaction groove and leach, adding iron sheet to the acidolysis reaction groove then reduces to high price iron, reduction reaction fully in the acidolysis reaction groove of back material deliver to thickener and carry out sedimentation and concentrate, underflow ore pulp after concentrated to sedimentation filters and washs, filter cake after the washing send neutralizing well to neutralize with alkali lye, and the slip after the neutralization is delivered to cyaniding workshop section and reclaimed gold and silver.
The clear liquor on thickener top is delivered to crystallization workshop section and is separated ferrous crystallization, generates green vitriol.
Size mixing technology is for to go surge tank to mix with the calcining ore deposit as spent acid the filtrate returning charge after crystallization and the ferrous separation.
The present invention adopts the sulfuric acid to leach reducing process that roasted ore is carried out deferrization and handles, and its main chemical reactions formula is:
Fe
2O
3+3H
2SO
4=Fe
2(SO
4)
3+3H
2O
2Fe
3++Fe=3Fe
2+
Making every effort to wrap up gold is all dissociated, be beneficial to subsequent handling to the recovery of gold and silver, improve the rate of recovery of gold and silver, after handling by the deferrization of this technology after tested, the cyaniding workshop section gold rate of recovery brings up to 95% from 85%, and Separation and Recovery auxiliary product ferrous sulfate wherein, more effectively utilizes gold ore resource, reduce the wasting of resources, create good economic benefit.
Description of drawings
Fig. 1 is process flow sheet of the present invention.
Embodiment
As shown in Figure 1, at first two sections calcinings after roasting for arsenic removal, the desulfurization are sized mixing, and size mixing technology is for to go surge tank to mix with calcining as spent acid the filtrate returning charge after crystallization and the ferrous separation; Send into the acidolysis reaction groove after sizing mixing, add 98% the vitriol oil, be diluted to about 70%, by the diluting concentrated sulfuric acid heat release slurry temperature is raise, main reaction takes place.Reaction makes and forms ferric sulfate after ferric oxide decomposes in the ore pulp.After main reaction finishes, add water in the acid hydrolysis tank and leach, add iron sheet then the high price iron in the solution is reduced into iron at a low price, when delivering to thickener after the ferric iron reduction fully in the solution, underflow ore pulp after sedimentation concentrates filters and washs with filter, filter cake after the washing enters neutralizing well, neutralizes with alkali lye, and the slip after the neutralization is delivered to follow-up cyaniding workshop section and reclaimed gold and silver.
The clear liquor on thickener top is delivered to crystallizer after filtering, by with steam being the certain vacuum of formation in the crystallizer that is pumped in of the steam injector of power and vacuum pump, make the moisture evaporation in the copperas solution in the crystallizer, the heat that moisture evaporation is taken away is minimized solution temperature, ferrous sulfate contained in the solution is separated out with the iron vitriol crystalline form gradually, after solution reaches certain temperature in the crystallizer, stop crystallization, solution after the crystallization is delivered to filter, make ferrous sulfate and the solution separating of crystallization.Deliver to ferrous sulfate after isolated ferrous sulfate washs after filtration and handle workshop section.
Claims (3)
1. adopt the sulfuric acid to leach reducing process to improve the method for the difficult-treating gold mine rate of recovery, it is characterized in that: the calcining that forms behind the gold containing ore two-stage calcination is sized mixing, slip after sizing mixing is sent into the acidolysis reaction groove, add 98% the vitriol oil until diluting concentrated sulfuric acid to 67～70% to the acidolysis reaction groove, after reaction finishes, add water in the acidolysis reaction groove and leach, adding iron sheet to the acidolysis reaction groove then reduces to high price iron, reduction reaction fully in the acidolysis reaction groove of back material deliver to thickener and carry out sedimentation and concentrate, underflow ore pulp after concentrated to sedimentation filters and washs, filter cake after the washing send neutralizing well to neutralize with alkali lye, and the slip after the neutralization is delivered to cyaniding workshop section and reclaimed gold and silver.
2. employing sulfuric acid to leach reducing process according to claim 1 improves the method for the difficult-treating gold mine rate of recovery, and it is characterized in that: the clear liquor on thickener top is delivered to crystallization workshop section and separated ferrous crystallization, generates green vitriol.
3. employing sulfuric acid to leach reducing process according to claim 1 improves the method for the difficult-treating gold mine rate of recovery, and it is characterized in that: the technology of sizing mixing is for to go surge tank to mix with calcining as spent acid the filtrate returning charge after crystallization and the ferrous separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101367051A CN103194598A (en) | 2013-04-19 | 2013-04-19 | Method for improving recovery rate of gold ore difficult to treat by adopting sulfuric acid leaching reduction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101367051A CN103194598A (en) | 2013-04-19 | 2013-04-19 | Method for improving recovery rate of gold ore difficult to treat by adopting sulfuric acid leaching reduction process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103194598A true CN103194598A (en) | 2013-07-10 |
Family
ID=48717413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101367051A Pending CN103194598A (en) | 2013-04-19 | 2013-04-19 | Method for improving recovery rate of gold ore difficult to treat by adopting sulfuric acid leaching reduction process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103194598A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789554A (en) * | 2014-03-11 | 2014-05-14 | 中南大学 | Copper-nickel slag step-by-step concentration difference leaching method |
| CN103805789A (en) * | 2014-03-11 | 2014-05-21 | 斯莱登（北京）化工科技有限公司 | Method for comprehensively recycling valuable metal from copper nickel slag |
| CN105779776A (en) * | 2014-12-24 | 2016-07-20 | 李瑶 | Method for recycling gold from roasting residues or roasting-leaching residues of gold concentrate |
| CN112143907A (en) * | 2020-09-28 | 2020-12-29 | 山东国大黄金股份有限公司 | Method for improving leaching rate of gold and silver in arsenic-containing gold concentrate |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0177290A2 (en) * | 1984-09-27 | 1986-04-09 | Sherritt Gordon Limited | Recovery of gold from refractory auriferous iron-containing sulphidic concentrates |
| WO1995004164A1 (en) * | 1993-07-28 | 1995-02-09 | Newmont Gold Co. | Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
| CN1114638A (en) * | 1994-07-08 | 1996-01-10 | 江兴全 | Process for producing ferrous sulfate by using sulfuric acid to leach pyrite cinder |
| CN1161379A (en) * | 1997-01-15 | 1997-10-08 | 核工业北京化工冶金研究院 | Method for extracting gold from refractory ore |
| WO2004059018A1 (en) * | 2002-12-31 | 2004-07-15 | Intec Ltd | Recovering metals from sulfidic materials |
| CN1597537A (en) * | 2004-08-06 | 2005-03-23 | 太原理工大学 | Production technology of ferrous sulfate vitriol from hematite |
| CN1614041A (en) * | 2004-10-11 | 2005-05-11 | 东华大学 | Enhanced acid dissolve of acidizing fired slags of concentrated gold ores containing sulfur |
| CN1986851A (en) * | 2006-12-06 | 2007-06-27 | 山东国大黄金股份有限公司 | Two-section roasting production process for recovering Au, Cu, Ag, As and s from As and C containing aurin ore |
| CN101787436A (en) * | 2010-01-26 | 2010-07-28 | 东华大学 | Wet-method preprocessing method for extracting gold through sulfating roasting slag of ore concentrate containing stibium and gold |
| CN102690942A (en) * | 2012-06-18 | 2012-09-26 | 中南大学 | Method for reduction roasting and fortified acid dissolving of sulfur-containing gold concentrate calcine |
-
2013
- 2013-04-19 CN CN2013101367051A patent/CN103194598A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0177290A2 (en) * | 1984-09-27 | 1986-04-09 | Sherritt Gordon Limited | Recovery of gold from refractory auriferous iron-containing sulphidic concentrates |
| WO1995004164A1 (en) * | 1993-07-28 | 1995-02-09 | Newmont Gold Co. | Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
| CN1114638A (en) * | 1994-07-08 | 1996-01-10 | 江兴全 | Process for producing ferrous sulfate by using sulfuric acid to leach pyrite cinder |
| CN1161379A (en) * | 1997-01-15 | 1997-10-08 | 核工业北京化工冶金研究院 | Method for extracting gold from refractory ore |
| WO2004059018A1 (en) * | 2002-12-31 | 2004-07-15 | Intec Ltd | Recovering metals from sulfidic materials |
| CN1597537A (en) * | 2004-08-06 | 2005-03-23 | 太原理工大学 | Production technology of ferrous sulfate vitriol from hematite |
| CN1614041A (en) * | 2004-10-11 | 2005-05-11 | 东华大学 | Enhanced acid dissolve of acidizing fired slags of concentrated gold ores containing sulfur |
| CN1986851A (en) * | 2006-12-06 | 2007-06-27 | 山东国大黄金股份有限公司 | Two-section roasting production process for recovering Au, Cu, Ag, As and s from As and C containing aurin ore |
| CN101787436A (en) * | 2010-01-26 | 2010-07-28 | 东华大学 | Wet-method preprocessing method for extracting gold through sulfating roasting slag of ore concentrate containing stibium and gold |
| CN102690942A (en) * | 2012-06-18 | 2012-09-26 | 中南大学 | Method for reduction roasting and fortified acid dissolving of sulfur-containing gold concentrate calcine |
Non-Patent Citations (1)
| Title |
|---|
| 何烨等: "酸浸提高金氰化浸出率的试验研究", 《黄金科学技术》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789554A (en) * | 2014-03-11 | 2014-05-14 | 中南大学 | Copper-nickel slag step-by-step concentration difference leaching method |
| CN103805789A (en) * | 2014-03-11 | 2014-05-21 | 斯莱登（北京）化工科技有限公司 | Method for comprehensively recycling valuable metal from copper nickel slag |
| CN103789554B (en) * | 2014-03-11 | 2015-09-30 | 中南大学 | A kind of substep concentration difference leaching method of copper nickel slag |
| CN105779776A (en) * | 2014-12-24 | 2016-07-20 | 李瑶 | Method for recycling gold from roasting residues or roasting-leaching residues of gold concentrate |
| CN112143907A (en) * | 2020-09-28 | 2020-12-29 | 山东国大黄金股份有限公司 | Method for improving leaching rate of gold and silver in arsenic-containing gold concentrate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104379778B (en) | From the method for complex oxide ore deposit and sulfide mine recovery indium, silver, gold and other rare metals, noble metal and base metal | |
| CN106868307B (en) | A kind of comprehensive utilization process of pyrite cinder arsenic removal enrichment gold and silver | |
| CN103540765B (en) | Zinc smelting technology | |
| CN101838736B (en) | Wet separation method for valuable metals in purified liquid cobalt slags of wet zinc smelting system | |
| CN102121068B (en) | Method for preparing vanadium pentoxide | |
| CN102443701B (en) | Clean metallurgic comprehensive utilization method of iron vitriol slags | |
| CN102766765B (en) | Zinc oxide powder recycling method | |
| CN102828025B (en) | Method for extracting V2O5 from stone coal navajoite | |
| CN103667720B (en) | Method for recovering zinc, indium, iron, and lead from high-iron zinc oxide mixture smelted with zinc | |
| CN102560087A (en) | Method for extracting indium and zinc from high-iron indium-containing zinc calcine and preparing iron oxide | |
| CN101418379B (en) | Method for extracting nickel and cobalt by enclosed leaching nickel oxide mine | |
| TWI465579B (en) | Method for recycling metal in waste catalyst comprised of aluminum | |
| TWI432584B (en) | A method for extracting metal from manganese residue | |
| CN103194602A (en) | Method for removing iron and recovering iron-enriched iron scum in wet-method zinc smelting process | |
| CN104480325A (en) | Method for extracting cobalt from cobalt-containing raw material | |
| CN105129839A (en) | Method for producing micron-grade zinc oxide with high fluorine and chlorine crude zinc oxide as raw material | |
| CN101914678A (en) | Method for producing industry molybdenum oxide from molybdenum concentrate | |
| CN101831542A (en) | Method for extracting metallic elements of ferrum, magnesium and calcium from molybdenum milltailings | |
| CN103194598A (en) | Method for improving recovery rate of gold ore difficult to treat by adopting sulfuric acid leaching reduction process | |
| CN104032131A (en) | Method for processing high-tin anode slurry | |
| CN102828034B (en) | Method for producing high-purity zinc oxide through decarbonization on low-grade zinc oxide ore by adopting ammonia process | |
| CN106995878A (en) | The recovery method of iron ore concentrate in lateritic nickel ore high pressure extract technology | |
| CN102031371A (en) | Method for enriching germanium from wet process zinc smelting system | |
| CN102399986A (en) | Method for recovering zinc from liquid obtained by calcining, acid leaching and copper extraction of gold concentrate containing zinc and copper | |
| CN105567999B (en) | A method of recycling valuable metal from zinc hydrometallurgy purified cobalt nickel slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130710 |