CN106367612B - It is a kind of by Au+It is converted to Au3+Method - Google Patents

It is a kind of by Au+It is converted to Au3+Method Download PDF

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CN106367612B
CN106367612B CN201610786449.4A CN201610786449A CN106367612B CN 106367612 B CN106367612 B CN 106367612B CN 201610786449 A CN201610786449 A CN 201610786449A CN 106367612 B CN106367612 B CN 106367612B
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aucn
gold
cyaniding
desorption
haucl
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CN106367612A (en
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胡永春
胡中
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/08—Obtaining noble metals by cyaniding
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention belongs to field of metallurgy, and in particular to one kind is in golden smelting process by Au+It is converted to Au3+Method.It comprises the following steps：Cyaniding is handled：Gold mine will be contained and carry out cyaniding processing, obtain the mixture containing AuCN；Activated carbon adsorption：The mixture containing AuCN of gained in step (1) by active carbon layer is adsorbed, obtains the gold loaded carbon containing AuCN；Desorption：Gold loaded carbon desorption containing AuCN is attached, obtain AuCN desorbed solutions；Conversion：HCl is added in into obtained AuCN stripping liquids and is passed through Cl2, controlling reaction temperature is 35 55 DEG C, and pressure is>HAuCl is obtained by the reaction in 5.4Mpa4.It can be directly obtained containing Au by the method for the present invention3+HAuCl4, technological process is short, and equipment dosage and requirement to equipment are relatively low；Energy consumption is relatively low in entire reaction process, has saved a large amount of energy compared with prior art.

Description

It is a kind of by Au+It is converted to Au3+Method
Technical field
The invention belongs to field of metallurgy, and in particular to one kind is in golden smelting process by Au+It is converted to Au3+Method.
Background technology
The cyaniding technology of extracting gold from is modern main pan means, and China is just carried using this method in early in the twentieth century Gold is taken, builds 2t/d cyanidation tests factory in Weihai in Shandong province Fan Jia ports head within 1901, after 1932 in Zhaoyuan, shandong, Yinan, Diafiltration and stirring cyanidation technology are tried out respectively in Taiwan gold melon stone within 1936.Section of Linglong gold minefield, Shandong gold mine in 1966 builds up Gold Concentrate under Normal Pressure machinery After continuously stirring cyanidation gold-extracted factory, 1970 Jinchangyu Gold Mine, Hebei, 1977 in Wulong Gold Deposit sequential use.Cyaniding charcoal Slurry carries technology for gold and is studied successfully in phase early 1980s, and respectively by Changchun Gold Research Institute in Henan Ling Hu, Jilin Province Jilin two gold mines of Chi Wei ditches build up the production-scale carbon pulp factories of 50t/d with Intellectual Property Right in China where emtallurgy research, this 20th century the mid-80 is introduced technology again from foreign countries afterwards and equipment builds up all sliming cyanidation charcoal in Tongguan Shanxi, body in Zhangjiakou Area, Hebei Province Slurry factory, the cyanidation gold-extracted technology in China have tremendous development, and technique is varied, and technology becomes better and approaching perfection day by day, and index steps up, application More extensively, the 1990s builds up Resin-in-Pulp gold extracting shop in gold mines such as Xinjiang A Xi again.Cyanidation gold-extracted technology has become The main force of China's gold industry production.Wherein refined gold ore cyaniding technique has existed since experimental study success the 1960s Many gold mine applications, it is especially more universal with Shandong, Hebei, Henan, Liaoning, Jilin and other places.
The technique is mainly characterized by：Gold ore is after floating and enriching, and concentrate Gold grade is high, into cyaniding operation ore deposit amount Few, cyanide consumption is low, and for acidization to cyanide wastewater high treating effect, environmental pollution is small, can save capital expenditure, takes up an area face Product is small, reduces production cost, and can realize pan on the spot.Refined gold ore cyaniding extraction of gold process is for the fairly simple original of mineral composition Rawore, general flotation recovery rate is higher, and usually between 93%-98%, the cyaniding rate of recovery is 95% or so, therefore, floats Choosing --- cyaniding overall recovery reaches 88%-94%, suitable with all sliming cyanidation technology.However, concentrate cyaniding is with respect to all sliming cyanidation For, capital expenditure is few, and cyanogens-containing sewage water amount is small, and production cost is low.The main reason for extensive use being obtained here it is this technique.
In existing extraction of gold process, gold mine becomes AuCN (Au completing cyaniding+) after, need the AuCN progress to gained Carbon adsorption is mesh removal of impurities and enrichment AuCN, obtains carrying golden carbon, then desorbs, obtains to carrying golden carbon under high temperature, high pressure AuCN(Au+) desorb your liquid, then by your liquid electrolytic deposition it is golden electrodeposition gold mud, then electrodeposition gold mud dissolved with chlorination processes method Obtain HAuCl4(Au3+), such technological process is long, is obtaining Au3+During be electrolysed, high energy consumption so that Golden production cost is high, and the production cycle is long.
Invention content
The present invention is to solve the deficiencies in the prior art, is provided a kind of by Au+It is converted to Au3+Method.
The present invention is achieved by the following technical solution：
It is a kind of by Au+It is converted to Au3+Method comprises the following steps：
(1) cyaniding is handled：Gold mine will be contained and carry out cyaniding processing, obtain the mixture containing AuCN；
(2) activated carbon adsorption：The mixture containing AuCN of gained in step (1) by activated carbon is adsorbed, is obtained Gold loaded carbon containing AuCN；
(3) desorption：Gold loaded carbon desorption containing AuCN is attached, obtain AuCN (Au+) stripping liquid；
(4) it converts：HCl is added in into obtained AuCN (Au+) stripping liquid and is passed through Cl2, make the expensive liquid of desorption and HCl PH value is 0-7, the Cl being passed through in mixing2Pressure is<10kPa, controlling reaction temperature are 35-55 DEG C, reaction pressure>5.4Mpa So that HCN will not become gas phase discharge, cause danger, but it is broken down into CO2, and N2, end reaction obtains HAuCl4(Au3 +)。
Compared with prior art, the present invention has the advantages that：(1) it can be directly obtained by the method for the present invention Contain Au3+HAuCl4, technological process is short, and equipment dosage and requirement to equipment are relatively low；(2) it can directly be replaced using the present invention In generation, is electrolysed AuCN stripping liquids to obtain Au3+Process, energy consumption is relatively low in entire reaction process, saves compared with prior art The about a large amount of energy；(3) method using the present invention substantially reduces the period for putting forward golden process, improves production efficiency； (4) method using the present invention is compared with using electrolysis, and the requirement to equipment is simple, has saved the expense of equipment, so as to drop The production cost of low gold.
Specific embodiment
With reference to embodiment, the present invention will be further described, but protection scope of the present invention is not limited by embodiment System.
Embodiment 1
It is a kind of by Au+It is converted to Au3+Method comprises the following steps：
(1) cyaniding is handled：Gold mine will be contained and carry out cyaniding processing, obtain the mixture containing AuCN；
(2) activated carbon adsorption：The mixture containing AuCN of gained in step (1) by active carbon layer is adsorbed, is obtained To the gold loaded carbon containing AuCN；
(3) desorption：Gold loaded carbon desorption containing AuCN is attached, obtain AuCN desorbed solutions；
(4) it converts：HCl is added in into obtained AuCN stripping liquids and is passed through Cl2, controlling reaction temperature is 35-55 DEG C, pressure Power is>HAuCl is obtained by the reaction in 5.4Mpa4。
Using the present embodiment technique and just using traditional electrolysis process handle respectively with a batch desorb 5 liters of your liquid, institute The indices situation of statistics is as shown in table 1.
1 embodiment 1 of table and electrolysis process contrast table
As can be seen from Table 1, using traditional electrolysis process, to cyaniding, treated that gold cyanide is handled, energy consumption, place The consumption of reason period and equipment is far longer than the method using the present embodiment；Using the gold recovery in two methods processing procedure It is essentially identical, more HCl are consumed due to needing using the present embodiment, therefore chemical consumption slightly above uses traditional electrolysis work Skill.
Experimental example 2
It is a kind of by Au+It is converted to Au3+Method comprises the following steps：
(1) cyaniding is handled：Gold mine will be contained and carry out cyaniding processing, obtain the mixture containing AuCN；
(2) activated carbon adsorption：The mixture containing AuCN of gained in step (1) by active carbon layer is adsorbed, is obtained To the gold loaded carbon containing AuCN；
(3) desorption：Gold loaded carbon desorption containing AuCN is attached, obtain AuCN desorbed solutions；
(4) it converts：HCl is added in into obtained AuCN stripping liquids and is passed through Cl2, controlling reaction temperature is 35-55 DEG C, pressure Power is>HAuCl is obtained by the reaction in 5.4Mpa4。
Specific raw material is as follows：3 liters of AuCN stripping liquids；2 liters of a concentration of 37%HCl solution.It is added in into AuCN stripping liquids HCl, addition are 2 liters, and Cl is passed through into AuCN and HCl mixed liquors2, the Cl that is passed through2Pressure is 7kPa, control reaction temperature It is 55 DEG C to spend, and reaction pressure 5.5Mpa, HCN are broken down into CO2, and N2.HAuCl is obtained by the reaction4 (Au3+)。
Reaction process is as follows：
CL2+H2O--->HCl+HOCl
AuCN+HCl--->AuCl+HCN
Overall reaction equation：
AuCN+HCl+CL2+H2O-->HAuCL4+CO2+N2
From aforesaid equation as can be seen that method through this embodiment can directly obtain HAuCl4(Au3+) for into One step purifies Au, and HCN is broken down into CO in the process2And N2。

Claims (1)

  1. It is 1. a kind of by Au+It is converted to Au3+Method, which is characterized in that comprise the following steps：
    (1) cyaniding is handled：Gold mine will be contained and carry out cyaniding processing, obtain the mixture containing AuCN；
    (2) activated carbon adsorption：The mixture containing AuCN of gained in step (1) by active carbon layer is adsorbed, is contained The gold loaded carbon of AuCN；
    (3) desorption：Gold loaded carbon desorption containing AuCN is attached, obtain the stripping liquid of AuCN；
    (4) it converts：HCl and Cl is added in into obtained AuCN stripping liquids2,It is 0- to make p H values in the mixing of the expensive liquid of desorption and HCl 7, the Cl being passed through 2 Pressure is<10kPa,Controlling reaction temperature is 35-55 DEG C, pressure>HAuCl is obtained by the reaction in 5.4MPa4。
CN201610786449.4A 2016-08-31 2016-08-31 It is a kind of by Au+It is converted to Au3+Method Active CN106367612B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5236676A (en) * 1992-06-11 1993-08-17 Freeport-Mcmoran, Inc. Pressure chlorination of refractory gold ores
CN101914683A (en) * 2010-08-23 2010-12-15 中国科学院过程工程研究所 Method for high-value and non-waste utilization of cyanidation slag
CN103194614A (en) * 2013-03-22 2013-07-10 紫金矿业集团股份有限公司 Low-grade copper-bearing gold ore dump leaching-carbon adsorption production method
CN105112657A (en) * 2015-05-25 2015-12-02 厦门紫金矿冶技术有限公司 Gold extracting method with activated carbons

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5236676A (en) * 1992-06-11 1993-08-17 Freeport-Mcmoran, Inc. Pressure chlorination of refractory gold ores
CN101914683A (en) * 2010-08-23 2010-12-15 中国科学院过程工程研究所 Method for high-value and non-waste utilization of cyanidation slag
CN103194614A (en) * 2013-03-22 2013-07-10 紫金矿业集团股份有限公司 Low-grade copper-bearing gold ore dump leaching-carbon adsorption production method
CN105112657A (en) * 2015-05-25 2015-12-02 厦门紫金矿冶技术有限公司 Gold extracting method with activated carbons

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