CN107058758B - The method of the high S high Fe two-step method meltings of gold mine containing Pb recycling gold and lead - Google Patents
The method of the high S high Fe two-step method meltings of gold mine containing Pb recycling gold and lead Download PDFInfo
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- CN107058758B CN107058758B CN201710285650.9A CN201710285650A CN107058758B CN 107058758 B CN107058758 B CN 107058758B CN 201710285650 A CN201710285650 A CN 201710285650A CN 107058758 B CN107058758 B CN 107058758B
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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
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
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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
- C22B11/02—Obtaining noble metals by dry processes
Abstract
The invention belongs to field of thermometallurgical technology, and in particular to a kind of method of high S high Fe gold mines containing Pb two-step method melting recycling gold and lead.The method is to be uniformly mixed high S high Fe gold mines containing Pb, fluxing agent, is put into crucible, and melting under the conditions of compressed air after melting, cools, and takes out crucible, is put into cold quenching in ice water, obtains galvanized iron mixed melting body and slag, then detach；After mixing by the galvanized iron mixed melting body obtained after separation, charcoal, melting is carried out, after melting, cools, obtains the lead bullion ferroalloy of Concentration of Gold.The present invention recycles Jin Heqian simultaneously, and the golden rate of recovery is more than 90%, and the rate of recovery of lead is more than 92%.
Description
Technical field
The invention belongs to field of thermometallurgical technology, and in particular to a kind of high S high Fe gold mines containing Pb two-step method melting recycling
The method of gold and lead.
Background technology
Golden refinement method is also different according to gold leaching rate difference in current high S high Fe complex gold ores containing Pb,
Mainly there are following methods：Ore grinding-roasting method, biological oxidation, pressure leaching method etc..
For iron coated gold mine, ore grinding refinement is to destroy package to make golden exposure and improve gold leaching rate side the most direct
Method, however as the increase of mog, ore grinding cost is substantially improved, and the gold of some difficult-treating gold mines cannot still be exposed, and
Sample ore particle is meticulous also absorption to have been enter into the gold in liquid phase during leaching gold, reduce gold leaching rate instead.
Biological oxidation utilizes the autotrophys strain such as acidophilic bacteria and medium temperature thermophilic bacteria, in advance to the pyrite and poison of package gold
The mineral such as sand are handled, and are oxidized as sulfate, sulphur and sulfuric acid, to make gold expose, then are carried out effective cyanogen
Change carries gold.This method has the advantages that at low cost, leaching rate is high, but the production cycle is long, adaptability to raw material is narrow.The gold mine of China
It is varied to produce resource, and bacterial oxidation gold metallurgy technology is only for effective in a certain particular types mine, and bacterial growth needs spy
Fixed condition, therefore this method hardly results in popularization.
Sulfuric acid pressure leaching method using hydrometallurgical method come decompose pyrite, mispickel and so that package gold is dissociated, be
Most successful one kind in method with hydrometallurgy to decompose pyrite, mispickel at present.This method major defect：Material requirement
Height, investment is big, is not easy to implement.
CN201110106567.3 discloses a kind of fluidization roasting method for gold sulfide ore, and it is primary to be related to a kind of difficult complexity
Coal is added, vertical in vulcanization gold mine by gold mine or the carbon containing microfine coated difficult-treating gold mine of low-sulfur concentrate, especially arsenic-containing sulphur-containing
It is dried in formula grinding machine and is mixed with fine grinding, carry out fluosolids roasting；The calcining of fluosolids roasting carries out cyanide gold-leaching after water quenching.
Advantage：It solves the current ore mining of difficult separation containing arsenic and puies forward the lower present situation of gold recovery with old process.Disadvantage：Suitable for low-sulfur
Concentrate roasting pretreatment, it is not applicable for high-sulfur high ferro gold mine.
CN201210007217.6 discloses a kind of pretreatment method of refractory gold ore, using dry-wet two level ball milling activation preimpregnation
Technique, first order dry grinding take vibratory milling, second level wet-milling to take stirring ball-milling, the reduction of mineral granularity and acid adding are presoaked
It is carried out at the same time.Advantage：Realize that the complete oxidation of sulphide ore decomposes and inhibit the generation of sulphur simple substance at relatively low temperatures and pressures,
Extraction temperature is low, and the time is short, and low energy consumption.Disadvantage：High energy consumption is not suitable for high ferro coated gold mine.
CN201310041102.3 discloses a kind of processing method of refractory gold ore, and this method is de- including broken homogenate, oxidation
Carbon, microorganism catalysis and cyanidation gold-extracted and etc., the present invention also provides a kind of microbial bacterial agents of processing refractory gold ore.It is excellent
Point：The sulphur arsenic carbon in gold mine can be effectively removed, while improving the leaching rate of gold element.Disadvantage：Production cycle is long,
Adaptability to raw material is narrow.
CN 201210260666.1 discloses a kind of energy saving optimizing carrying out microwave calcining and non-cyanide leaching gold to sulfur-bearing gold mineral
Technique includes the following steps：(1) water is added to stir into ore pulp Gold Concentrate under Normal Pressure or gold ore；(2) microwave radiation roasts；(3) in calcining
Middle addition Fe2(SO4)3And FeSO4, add water carry out fine grinding；(4) multistage leaching, magnetic separation after fine grinding.Advantage：It can using the present invention
Leaching rate golden in the gold ore of sulfur-bearing or Gold Concentrate under Normal Pressure is increased to 97% or more.Disadvantage：Using microwave calcining, fine grinding, segmentation
It leaches, of high cost, long flow path, high energy consumption.
The above method exists when handling high S high Fe complex gold ores containing Pb or golden recovery rate is low or complex process, energy consumption
Height or material require the problems such as harsh, it is difficult to commercial Application.In view of current technology it is difficult to break through high S high Fe containing the complicated gold of Pb
The technical bottleneck of mine extraction gold, and low-consumption high-efficiency processing high S high Fe complex gold ores containing Pb are current difficult to complexity both at home and abroad
The development trend of the efficient research on utilization of gold ore resource, traditional pyrometallurgy increasingly strict with the anxiety and environmental regulation of the energy
Technique is gradually replaced by new intensified smelting method.
Invention content
Technical problem to be solved by the invention is to provide a kind of high S high Fe gold mines containing Pb two-step method meltings to recycle Jin Heqian
Method, by direct melting and reduction melting obtain containing gold lead bullion ferroalloy, to recycle Jin Heqian.
The method of high S high Fe gold mines containing Pb two-step method melting recycling gold and lead of the present invention, includes the following steps：
(1) direct melting：
High S high Fe gold mines containing Pb, fluxing agent are uniformly mixed, are put into crucible, melting under the conditions of compressed air, melting
Afterwards, it cools, takes out crucible, be put into cold quenching in ice water, obtain lead-iron mixed melting body and slag, then detach；
(2) reduction melting：
After mixing by the lead obtained after separation-iron mixed melting body, charcoal, melting is carried out, after melting, is cooled,
Obtain the lead bullion ferroalloy of Concentration of Gold.
Wherein：
High S high Fe gold mines containing Pb described in step (1) contain S：10~25wt.%, Fe：15~30wt.%, Si：10~
25wt.%, Pb：4~20wt.%, O:10~30wt.%, Au：20~100g/t；The granularity of high S high Fe gold mines containing Pb is
0.075~0.125mm.
Fluxing agent described in step (1) is iron calcium-silicon slag, and Fe/Si molar ratios are 1.1~1.4 in iron calcium-silicon slag:1, Ca/Si
Molar ratio is 0.2~0.5:1, iron calcium-silicon slag is by Fe2O3Content is more than the iron ore of 70wt.%, SiO2Content is more than 85wt.%
Quartz sand and CaO content be prepared more than the quick lime of 90wt.%.
The mass ratio of high S high Fe gold mines containing Pb, fluxing agent described in step (1) is 1:0.1~0.3.
The pressure of compressed air described in step (1) is 0.7~0.9MPa, and flow velocity is 10~15m/s.
Smelting temperature described in step (1) is 1100~1300 DEG C, and smelting time is 20~60min, after melting, cooling drop
Temperature is to 500~600 DEG C.
Charcoal described in step (2) is coke, and C content is in 90wt.% or more.
The mass ratio of lead-iron mixed melting body and charcoal described in step (2) is 1:0.01~0.05.
Smelting temperature described in step (2) is 1100~1400 DEG C, and smelting time is 20~40min, after melting, cooling drop
It warms to room temperature.
The SO generated in step (1), step (2) fusion process2Flue gas dust collection is passed through in alkaline solution and absorbs SO2, purification
After discharge.
The lead-iron mixed melting body contains Fe：30~60wt.%, S：15~30wt.%, Pb：5~30wt.%,
Au：50~150g/t；The lead bullion ferroalloy of the Concentration of Gold contains Fe：45~81wt.%, Pb：10~45wt.%, Au：80
~200g/t.
Beneficial effects of the present invention are as follows：
Metallic element in gold mine of the present invention exists in the form of an ion in the molten state, after being passed through compressed air so that
It is be combined with each other by ionic bond between metal ion, between metal and sulphur, between metal and oxygen, is deposited to bottom under the effect of gravity
Portion forms lead-iron mixed melting body of sulfide and oxide rich in Au, Fe, Pb；Lead-iron mixed melting body is carried out to add charcoal
In fusion process, in reducing atmosphere, the metallic compound in lead-iron mixed melting body is further restored for reduction melting
At metallic, the lead bullion ferroalloy of Concentration of Gold is formed.
The difficult-treating gold mines such as high S high Fe leaded wrapped particle gold addition fluxing agent is carried out direct melting by the present invention,
Metal element A u, Fe, Pb are enriched in lead-iron mixed melting body, further plus charcoal carries out reduction melting, and lead-iron is mixed
Metallic compound in molten mass phase restores the lead bullion ferroalloy to form Concentration of Gold.The rate of recovery of gold is more than 90%, the recycling of lead
Rate is more than 92%.The high S high Fe two-step method meltings of gold mine containing Pb are applied widely, can handle a plurality of types of difficult-treating gold mines,
High to Biosorption of Metal Elements degree, energy consumption is low.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific implementation mode
The present invention is described further with reference to embodiments.
Embodiment 1
High S high Fe gold mines containing Pb contain S：15wt.%, Fe：25wt.%, Si：20wt.%, Pb：4.7%, O:
30wt.%, Au：30g/t, remaining is the customary impurities such as Al, K；The granularity of high S high Fe gold mines containing Pb is 0.075~0.09mm.
Fluxing agent is iron calcium-silicon slag, and wherein iron calcium-silicon slag is by Fe2O3Content is iron ore, the SiO of 85wt.%2Content
The quartz sand of 98wt.%, the quick lime that CaO content is 95wt.% are prepared, and Fe/Si molar ratios are 1.2:1, Ca/Si mole
Than being 0.2:1.
By above-mentioned gold mine and fluxing agent with mass ratio 1:0.2 after mixing, is put into corundum crucible, and corundum crucible is put
Enter in the fluidized bed furnace that temperature is 1250 DEG C, while being passed through the compressed air of 0.8MPa, 10~15m/s of flow velocity, melting 30min, from
600 DEG C so are cooled to, is taken out, is placed in mixture of ice and water with crucible tongs.After complete cooling, by corundum crucible along vertical plane
It is cut into two parts.Material after roasting is divided into upper layer and lower layer, and upper layer is slag, and lower layer is lead-iron mixed melting body, gold enrichment
In lead-iron mixed melting body.
Lead-iron mixed melting body contains Fe：48.5wt.%, S：20wt.%, Pb：7.7wt%, Au：65g/t, remaining is
Oxygen element.
By lead-iron mixed melting body and coke with mass ratio 1:0.04 after mixing, is put into corundum crucible, by corundum
It is melting 30min in 1250 DEG C of fluidized bed furnaces that crucible, which is again placed in temperature, and cooled to room temperature cuts corundum earthenware as stated above
Crucible obtains lead bullion ferroalloy, and gold enrichment is wherein.
The lead bullion ferroalloy of Concentration of Gold contains Fe：76wt.%, Pb：22wt.%, Au:116g/t, remaining is metal impurities.
Jin Heqian is obtained by electrolysis again.
Sulfur dioxide in flue gas is absorbed using sodium hydroxide solution, by two step meltings, gold recovery 95%, lead recycling
Rate is 96%.
Embodiment 2
High S high Fe gold mines containing Pb contain S：19wt.%, Fe：29wt.%, Si：16wt.%, Pb：5wt.%, O:
28wt.%, Au：60g/t, remaining is the customary impurities such as Al, K；The granularity of high S high Fe gold mines containing Pb is 0.09~0.125mm.
Fluxing agent is iron calcium-silicon slag, and wherein iron calcium-silicon slag is by Fe2O3Content is iron ore, the SiO of 86wt.%2Content
The quartz sand of 95wt.%, the quick lime that CaO content is 90wt.% are prepared, and Fe/Si molar ratios are 1.15:1, Ca/Si rubs
You are than being 0.3:1.
By above-mentioned gold mine and fluxing agent with mass ratio 1:0.25 after mixing, is put into corundum crucible, by corundum crucible
It is put into the fluidized bed furnace that temperature is 1200 DEG C, while being passed through the compressed air of 0.8MPa, 10~15m/s of flow velocity, melting 30min,
500 DEG C are naturally cooled to, is taken out with crucible tongs, is placed in mixture of ice and water.After complete cooling, by corundum crucible along vertical
Face is cut into two parts.Material after roasting is divided into upper layer and lower layer, and upper layer is slag, and lower layer is lead-iron mixed melting body, Jin Fu
Collect in lead-iron mixed melting body.
Lead-iron mixed melting body contains Fe：47wt.%, S：24wt.%, Pb：8.9wt%, Au：98g/t, remaining is oxygen
Element.
By lead-iron mixed melting body and coke with mass ratio 1:0.05 after mixing, is put into corundum crucible, by corundum
It is melting 20min in 1200 DEG C of fluidized bed furnaces that crucible, which is again placed in temperature, and cooled to room temperature cuts corundum earthenware as stated above
Crucible obtains lead bullion ferroalloy, and gold enrichment is wherein.
The lead bullion ferroalloy of Concentration of Gold contains Fe：80.3wt.%, Pb：15.4wt.%, Au：135g/t, remaining is metal
Impurity.Jin Heqian is obtained by electrolysis again.
Sulfur dioxide in flue gas is absorbed using sodium hydroxide solution, by two step meltings, gold recovery 93%, lead recycling
Rate is 95%.
Embodiment 3
High S high Fe gold mines containing Pb contain S：16wt.%, Fe：20wt.%, Si：18wt.%, Pb：15wt.%, O:
26wt.%, Au：70g/t, remaining is the customary impurities such as Al, K；The granularity of high S high Fe gold mines containing Pb is 0.075~0.09mm.
Fluxing agent is iron calcium-silicon slag, and wherein iron calcium-silicon slag is by Fe2O3Content is iron ore, the SiO of 82wt.%2Content
The quartz sand of 94wt.%, the quick lime that CaO content is 92wt.% are prepared, and Fe/Si molar ratios are 1.25:1, Ca/Si rubs
You are than being 0.4:1.
By above-mentioned gold mine and fluxing agent with mass ratio 1:0.1 after mixing, is put into corundum crucible, and corundum crucible is put
Enter in the fluidized bed furnace that temperature is 1200 DEG C, while being passed through the compressed air of 0.8MPa, 10~15m/s of flow velocity, melting 30min, from
600 DEG C so are cooled to, is taken out, is placed in mixture of ice and water with crucible tongs.After complete cooling, by corundum crucible along vertical plane
It is cut into two parts.Material after roasting is divided into upper layer and lower layer, and upper layer is slag, and lower layer is lead-iron mixed melting body, gold enrichment
In lead-iron mixed melting body.
Lead-iron mixed melting body contains Fe：37.6wt.%, S：19.6wt.%, Pb：22wt.%, Au：81.2g/t
Remaining is oxygen.
By lead-iron mixed melting body and coke with mass ratio 1:0.03 after mixing, is put into corundum crucible, by corundum
It is melting 30min in 1200 DEG C of fluidized bed furnaces that crucible, which is again placed in temperature, and cooled to room temperature cuts corundum earthenware as stated above
Crucible obtains lead bullion ferroalloy, and gold enrichment is wherein.
The lead bullion ferroalloy of Concentration of Gold contains Fe：59.6wt.%, Pb：37wt.%, Au：118g/t, remaining is miscellaneous for metal
Matter.Jin Heqian is obtained by electrolysis again.
Sulfur dioxide in flue gas is absorbed using sodium hydroxide solution, by two step meltings, gold recovery 90%, lead recycling
Rate is 92%.
Embodiment 4
High S high Fe gold mines containing Pb contain S：21wt.%, Fe：20wt.%, Si：18.6wt.%, Pb：20wt.%, O:
19wt.%, Au：55g/t, remaining is the customary impurities such as Al, K；The granularity of high S high Fe gold mines containing Pb is 0.075~0.09mm.
Fluxing agent is iron calcium-silicon slag, and wherein iron calcium-silicon slag is by Fe2O3Content is iron ore, the SiO of 80wt.%2Content
The quartz sand of 95wt.%, the quick lime that CaO content is 90wt.% are prepared, and Fe/Si molar ratios are 1.1:1, Ca/Si mole
Than being 0.5:1.
By above-mentioned gold mine and fluxing agent with mass ratio 1:0.3 after mixing, is put into corundum crucible, and corundum crucible is put
Enter in the fluidized bed furnace that temperature is 1200 DEG C, while being passed through the compressed air of 0.8MPa, 10~15m/s of flow velocity, melting 25min, from
600 DEG C so are cooled to, is taken out, is placed in mixture of ice and water with crucible tongs.After complete cooling, by corundum crucible along vertical plane
It is cut into two parts.Material after roasting is divided into upper layer and lower layer, and upper layer is slag, and lower layer is lead-iron mixed melting body, gold enrichment
In lead-iron mixed melting body.
Lead-iron mixed melting body contains Fe：45wt.%, S：15wt.%, Pb：28wt.%, Au：80g/t, remaining is oxygen.
By lead-iron mixed melting body and coke with mass ratio 1:0.05 after mixing, is put into corundum crucible, by corundum
It is melting 20min in 1200 DEG C of fluidized bed furnaces that crucible, which is again placed in temperature, and cooled to room temperature cuts corundum earthenware as stated above
Crucible obtains lead bullion ferroalloy, and gold enrichment is wherein.
The lead bullion ferroalloy of Concentration of Gold contains Fe：58.84wt.%, Pb：40.6wt.%, Au：140g/t, remaining is metal
Impurity.Jin Heqian is obtained by electrolysis again.
Sulfur dioxide in flue gas is absorbed using sodium hydroxide solution, by two step meltings, gold recovery 90%, lead recycling
Rate is 93%.
Comparative example 1
In addition to being added without compressed air, remaining is such as embodiment 1.
Lead-iron mixed melting body contains Fe：40.5wt.%, S：25wt.%, Pb：5.5wt%, Au：58g/t, remaining is
Oxygen element.
The lead bullion ferroalloy of Concentration of Gold contains Fe：74wt.%, Pb：18wt.%, Au:110g/t, remaining is metal impurities.
Jin Heqian is obtained by electrolysis again.
By two step meltings, gold recovery 90%, lead recovery 91%.
Comparative example 2
In addition to being added without compressed air, remaining is such as embodiment 2.
Lead-iron mixed melting body contains Fe：45wt.%, S：26wt.%, Pb：6.7wt%, Au：90g/t, remaining is oxygen
Element.
The lead bullion ferroalloy of Concentration of Gold contains Fe：79.3wt.%, Pb：12.8wt.%, Au：120g/t, remaining is metal
Impurity.Jin Heqian is obtained by electrolysis again.
By two step meltings, gold recovery 88%, lead recovery 89%.
Comparative example 3
In addition to being added without compressed air, remaining is such as embodiment 3.
Lead-iron mixed melting body contains Fe：38.9wt.%, S：21wt.%, Pb：20wt.%, Au：75.3g/t remaining
For oxygen.
The lead bullion ferroalloy of Concentration of Gold contains Fe：61wt.%, Pb：35wt.%, Au：102g/t, remaining is metal impurities.
Jin Heqian is obtained by electrolysis again.
By two step meltings, gold recovery 85%, lead recovery 90%.
Comparative example 4
In addition to being added without compressed air, remaining is such as embodiment 4.
Lead-iron mixed melting body contains Fe：44wt.%, S：17wt.%, Pb：25wt.%, Au：72g/t, remaining is oxygen.
The lead bullion ferroalloy of Concentration of Gold contains Fe：59.9wt.%, Pb：37.3%, Au：120g/t, remaining is miscellaneous for metal
Matter.Jin Heqian is obtained by electrolysis again.
By two step meltings, gold recovery 80%, lead recovery 90%.
The calculating of the rate of recovery is according to following formula in embodiment and comparative example：
Weight metal in the weight of the rate of recovery=recycling metal/high S high Fe gold mines containing Pb.
Claims (7)
1. a kind of method of high S high Fe gold mines containing Pb two-step method melting recycling gold and lead, it is characterised in that include the following steps：
（1）Direct melting：
High S high Fe gold mines containing Pb, fluxing agent are uniformly mixed, are put into crucible, melting under the conditions of compressed air, after melting,
It cools, takes out crucible, be put into cold quenching in ice water, obtain lead-iron mixed melting body and slag, then detach；
（2）Reduction melting：
After mixing by the lead obtained after separation-iron mixed melting body, charcoal, melting is carried out, after melting, cools, obtains
The lead bullion ferroalloy of Concentration of Gold；
Wherein：
The high S high Fe gold mines containing Pb contain S：10~25 wt.%, Fe：15~30 wt.%, Si：10~25 wt.%, Pb：
4~20 wt.%, O:10~30 wt.%, Au：20~100 g/t；
The fluxing agent is iron calcium-silicon slag, and Fe/Si molar ratios are 1.1~1.4 in iron calcium-silicon slag:1, Ca/Si molar ratio is 0.2
~0.5:1, iron calcium-silicon slag is by Fe2O3Content is more than the iron ore of 70 wt.%, SiO2Content more than 85 wt.% quartz sand and
Quick lime of the CaO content more than 90 wt.% is prepared；
The lead-iron mixed melting body contains Fe：30~60 wt.%, S：15~30 wt.%, Pb：5~30 wt.%, Au：50
~150 g/t；
Step（1）The smelting temperature be 1100~1300 DEG C, smelting time be 20~60min, after melting, cool to
500~600 DEG C；
Step（2）The smelting temperature be 1100~1400 DEG C, smelting time be 20~40min, after melting, cool to
Room temperature.
2. the method for high S high Fe gold mines containing Pb two-step method melting recycling gold and lead according to claim 1, feature exist
In：Step（1）The granularity of high S high Fe gold mines containing Pb is 0.075~0.125mm.
3. the method for high S high Fe gold mines containing Pb two-step method melting recycling gold and lead according to claim 1, feature exist
In：Step（1）The mass ratio of the high S high Fe gold mines containing Pb, fluxing agent is 1:0.1~0.3.
4. the method for high S high Fe gold mines containing Pb two-step method melting recycling gold and lead according to claim 1, feature exist
In：Step（1）The pressure of the compressed air is 0.7~0.9MPa, and flow velocity is 10~15m/s.
5. the method for high S high Fe gold mines containing Pb two-step method melting recycling gold and lead according to claim 1, feature exist
In：Step（2）The charcoal is coke, and C content is in 90 wt.% or more, the mass ratio of the lead-iron mixed melting body and charcoal
It is 1:0.01~0.05.
6. the method for high S high Fe gold mines containing Pb two-step method melting recycling gold and lead according to claim 1, feature exist
In：Step（1）, step（2）The SO generated in fusion process2Flue gas dust collection is passed through in alkaline solution and absorbs SO2, purify heel row
It puts.
7. the method for high S high Fe gold mines containing Pb two-step method melting recycling gold and lead according to claim 1, feature exist
In：The lead bullion ferroalloy of the Concentration of Gold contains Fe：45~81 wt.%, Pb：10~45 wt.%, Au：80~200g/t.
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|---|---|---|---|---|
| CN104388690A (en) * | 2014-11-01 | 2015-03-04 | 中南大学 | Method for carrying out bath smelting concentration on valuable metals in arsenic-containing refractory gold ore |
| CN104388980A (en) * | 2014-10-11 | 2015-03-04 | 贵州永鑫冶金科技有限公司 | Method for extracting gold from difficultly treated gold ore |
| CN106521189A (en) * | 2016-10-21 | 2017-03-22 | 河池市生富冶炼有限责任公司 | Oxygen-enriched molten pool antimony refining production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388980A (en) * | 2014-10-11 | 2015-03-04 | 贵州永鑫冶金科技有限公司 | Method for extracting gold from difficultly treated gold ore |
| CN104388690A (en) * | 2014-11-01 | 2015-03-04 | 中南大学 | Method for carrying out bath smelting concentration on valuable metals in arsenic-containing refractory gold ore |
| CN106521189A (en) * | 2016-10-21 | 2017-03-22 | 河池市生富冶炼有限责任公司 | Oxygen-enriched molten pool antimony refining production process |
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