CN1360064A - Method for extracting zinc from zinc-containing sulfide minerals - Google Patents
Method for extracting zinc from zinc-containing sulfide minerals Download PDFInfo
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- CN1360064A CN1360064A CN01140484A CN01140484A CN1360064A CN 1360064 A CN1360064 A CN 1360064A CN 01140484 A CN01140484 A CN 01140484A CN 01140484 A CN01140484 A CN 01140484A CN 1360064 A CN1360064 A CN 1360064A
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Abstract
A method for extracting zinc from zinc-containing sulfide minerals relates to a hydrometallurgical process for extracting zinc from zinc-containing sulfide minerals, lead/zinc mixed minerals and zinc concentrate. The method is characterized in that zinc-containing sulfide minerals are subjected to pressure leaching in the presence of oxygen and sulfuric acid, the technical process and conditions are that the granularity of the leached minerals is more than 90% and less than 50 mu m, the liquid-solid ratio is 1-8: 1, the initial sulfuric acid concentration of leaching is 50-200 g/l, the total leaching pressure is 200-1000 kPa, the oxygen partial pressure is 100-800 kPa, and the temperature is 100-130 ℃. The method is characterized by low leaching temperature, good selectivity and most of iron being inhibited in slag. Avoids the problem of sulfur wrapping the surface of the mineral, and harmful impurities such as arsenic are solidified in the arsenic-iron slag, thus being an environment-friendly process.
Description
(1) technical field
A kind of method of extracting zinc from Zn-containing sulfide ore, relate to from zinc ore concentrate or unmanageable Zn-containing sulfide ore, as the high zink sulphide of iron content, lead/zinc bulk concentrate, or contain the method for extracting zinc in the arsenic zinc ore concentrate, particularly from above-mentioned zinc-bearing mineral, extract the method for zinc in pressurization leaching mode.
(2) background technology
Traditional Zinc hydrometallurgy process is to adopt zinc ore concentrate roasting-sulfuric acid leaching-purification of leaching liquor-electrolysis production electricity zinc.But there is following shortcoming in it: 1) produce a large amount of flue dust and sulfur dioxide gas during the zinc ore concentrate roasting, need huge acid making system also environmental pollution problems to be arranged; 2) traditional Zinc hydrometallurgy process is unsuitable for handling the zinc ore concentrate that contains high ferro, high lead and high silicon, influences the leaching yield of zinc, and liquid-solid separation difficulty; 3) complex technical process after the zinc ore concentrate roasting becomes calcining, needs to leach and acid the leaching and complicated iron removal through neutral.At the deficiency of traditional Zinc hydrometallurgy process, Buddhist relics extra-high-speed Er Deng mining company in 1981 and Ke Mingke propose to adopt pressurization to leach zinc ore concentrate, have obtained good effect, and successfully have been used for suitability for industrialized production.The pressurization of zinc ore concentrate leach be with zinc ore concentrate in waste electrolyte or acidic solution, under the condition that oxygen exists, carry out pressure and leach, generate zinc sulfate and elementary sulfur, pyrite then is oxidized to rhombohedral iron ore and sulfate radical.Compare with traditional Zinc hydrometallurgy process, it is simple that production technique is leached in pressurization, and the efficient height, floor space is few, environmental pollution is little, and the elementary sulfur that produces is convenient to store and transportation, has solved sulphuric acid output surplus in the world, the problem of sulfuric acid transportation and sale difficulty.This technology can be connected effectively with traditional roasting-extract technology, all has very strong competitive power aspect economic benefit and the environmental protection.
At present, many research work have been carried out in the pressurization leaching of zinc ore concentrate abroad, and the industrialized example of existing realization.At United States Patent (USP) 4,505, in 744, proposed from zinc and iron, plumbous zinc ore concentrate pressurization and leached the technology that reclaims zinc.This technology is under 130 ℃-150 ℃, adds sulfuric acid, its add-on be stoichiometry with the zinc reaction after amount 50%-100%, one of output contains the slag of the leaded and sulphur of the leach liquor of zinc and iron and one.With physical method separate sulfur and reclaim lead skim from slag, the iron in the leach liquor adopts chemical precipitation method to purify.At United States Patent (USP) 4,832, in 925, proposed containing the zinc pressure treatment method of the zinc ore concentrate of iron content, lead, silver simultaneously.Zinc-bearing mineral is leached with excessive sulfuric acid oxidation pressure down at 130 ℃-170 ℃, and sulfuric acid amount is than the excessive acid 40%-100% that reacts with zinc, and one of output contains the leach liquor of zinc, iron and lead, silver-colored slag.Adopt neutralisation to regulate leach liquor pH precipitated iron, the solution after the purification send the zinc electrolysis.At United States Patent (USP) 4,330, in 379, adopt one section or two sections pressurizations and one section normal pressure to leach and reclaim zinc.Zinciferous sulfide mineral is being carried out one section or two-stage oxidizing pressure leaching recovery zinc below 119 ℃.In one section pressurization was leached, most of iron was precipitated in leaching process, and a part of zinc in the sulphide ores is not leached.One section pressurization leach liquor send the zinc electrolysis through chemical precipitation after degree of depth deironing and purification remove other impurity.Leachings of pressurizeing again of one section pressurization leached mud connects and carries out normal pressure with useless zinc electrolyte and leach, and with the zinc that recovery is not leached, leach liquor returns first section leaching dosing of pressurizeing.The normal pressure leached mud reclaims elementary sulfur.The extraction temperature of this technology is low, but the technical process complexity, and to leach the zinc recovery that just can obtain more than 90% by two sections pressurization leachings and one section normal pressure.
(3) summary of the invention
The objective of the invention is the deficiency that exists in the above-mentioned technology, provide a kind of extraction temperature low, and technology is simple, flow process short, what leaching effect was good extracts the method for zinc from Zn-containing sulfide ore.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method from Zn-containing sulfide ore extraction zinc is characterized in that its process is:
A) Zn-containing sulfide ore being milled to granularity is less than 50 μ m more than 90%;
B) mineral after will grinding leach adding under acid, the pressurized conditions, the ore pulp liquid-solid ratio that control is leached is 1-8: 1, initial sulfuric acid concentration is 50g/l-200g/l, the leaching total pressure is 200kPa-1000kPa, oxygen partial pressure is 100kPa-800kPa, temperature is 100 ℃-130 ℃, and extraction time is 1 hour-4 hours;
C) leach liquor is after deironing and substitution method purify, electrolysis production electricity zinc, and leached mud reclaims sulphur and lead respectively.
A kind of method from Zn-containing sulfide ore extraction zinc is characterized in that the vitriolic starting point concentration that leaches is 100g/l-180g/l.
A kind of method from Zn-containing sulfide ore extraction zinc, the liquid-solid ratio that it is characterized in that leach liquor is 4-6: 1.
A kind of method from Zn-containing sulfide ore extraction zinc, the temperature that it is characterized in that leach liquor is 105 ℃-115 ℃.
A kind of method from Zn-containing sulfide ore extraction zinc, it is characterized in that leaching total pressure is 300kPa-800kPa, oxygen partial pressure is 100kPa-300kPa.
A kind of method from Zn-containing sulfide ore extraction zinc, the time of leaching that it is characterized in that pressurizeing is 2 hours-3 hours.
The iron removal of method of the present invention can be with blowing air or with the deironing of Manganse Dioxide oxidation precipitation.Can be to be connected, iron is removed at neutral extracting stage with the zinc ore concentrate roasting-wet method smelting process of routine.
Pressure leaching process of the present invention and conventional zinc ore concentrate roasting-wet method smelting process combination, leach the back in neutrality and connect acid the leaching, be used to handle zinc ore concentrate, the acid leach liquor that leaches output advances pressurization and leaches dosing, and the solution that output is leached in pressurization returns neutral the leaching.
Method of the present invention, the sulphur in the pressurization leached mud reclaims with the method for flotation, and desulfurization slag further reclaims plumbous blowing air oxidation precipitation.
Reclaim plumbous method in the pressurization leached mud of method of the present invention, desulfurization slag is converted into lead carbonate with bicarbonate of ammonia with lead sulfate, and the lead skim after transition send plumbous smelting system.
The pressurization leached mud of method of the present invention reclaims plumbous method, and the pressurization leached mud adopts the suspension electrolysis art breading, and the solution of output returns pressurization and leaches.Slag is output spongy lead, elementary sulfur and finishing slag after ore dressing separates.
Method of the present invention is having realized that one section leaching can be finished Zn-containing sulfide ore under the condition of low extraction temperature and pressure, as zinc ore concentrate, or unmanageable high ferro or contain the efficient leaching of zinc in the arsenic zinc ore concentrate.The leaching process oxygen partial pressure is low, does not need to add sulphur content powder, and the sulphur in the mineral is oxidized into elementary sulfur rather than sulfuric acid.Zinc in the mineral is efficiently leached, and iron enters leached mud with the form of Indian red, and other harmful element such as arsenic, antimony, bismuth also can be solidificated in the leached mud.Being one is used for Zn-containing sulfide ore or concentrate and puies forward the simple, efficient of zinc, eco-friendly technology.
Adopt method of the present invention, the zinc leaching rate in the zinc ore concentrate is greater than 95%.Do not produce the problem of sulphur parcel, the sulphur in the concentrate all is oxidized to elementary sulfur, realizes that in leaching zinc, iron separate, and most of iron enters in the slag.Obtain a more purified leach liquor, a spot of iron is removed with oxidation-precipitation method in the leach liquor.Liquid send the zinc electrolysis after the deironing after purifying.Therefore, this technology is simple efficient, an eco-friendly flow process.Another characteristics adaptability of method of the present invention is wider, can handle unmanageable iron content height, plumbous height or arsenical zinc sulphide minerals.This method can make up with the zinc ore concentrate roasting-wet method smelting process (neutral leaching-acidity leaches) of routine, and the characteristics of this technology are the leaching yield height of zinc.The leach liquor that the acidleach iron content is high advances pressurization and leaches, and the pressurization leach liquor of output contains acid, iron content is lower, can return the further deironing of neutral extracting stage.Cancel the siderotil operation of ordinary method pickling liquor deironing simultaneously, make flowage structure more reasonable.Method of the present invention is used to handle the high or plumbiferous zinc ore concentrate of iron content, and the pressurization leach liquor iron content of output, sour low be easy to further purifying treatment, and flowage structure is brief.
(4) description of drawings
Fig. 1 method of the present invention is extracted the principle flow chart of zinc from Zn-containing sulfide ore.
Fig. 2 method of the present invention is extracted the principle flow chart of plumbous zinc from zinc ore concentrate and lead and zinc bulk concentrate.
(5) embodiment
A kind of method of extracting zinc from Zn-containing sulfide ore will be waited to leach more than the mineral wet-milling to 90% less than 50 μ m; The liquid-solid ratio that control is leached is 1-8: 1, initial sulfuric acid concentration in the leaching agent is 50g/l-200g/l, the total pressure ion is 200kPa-1000kPa in the control leaching still, oxygen partial pressure is 100kPa-800kPa, temperature is 100 ℃ of-130 ℃ of leachings of pressurizeing, and leach liquor leach liquor after purifying send the zinc electrolysis.
The present invention can handle Zn-containing sulfide ore, and zinc mineral contains zinc 5%-70%, sulphur 10%-40%, iron content 20%-35%.Also available this method of the difficult zinc ore concentrate of leaded, arsenic, antimony, bismuth is handled.
In the present invention, the acidity height helps the leaching of zinc, but too high leaching to iron also can increase, and best vitriolic concentration is 100g/l-180g/l.
In the present invention, the temperature of leach liquor is controlled at 105 ℃-115 ℃, and the leaching under the lesser temps of realization zinc ore concentrate has solved the problem of sulphur parcel in the leaching process simultaneously.
In the present invention, the leaching total pressure is 300kPa-800kPa, and oxygen partial pressure is 100kPa-500kPa.By the control oxygen partial pressure, can guarantee that the sulphur in the mineral is oxidized to elementary sulfur rather than sulfuric acid, and pyrite is not oxidized substantially.
In the present invention, the time that pressurization is leached is 1 hour-4 hours, and with the prolongation of extraction time, the leaching yield of copper increases, and the ratio that the leaching yield of iron and sulphur are converted into vitriol also can increase, and is the best with 2 hours-3 hours.
Advantage of the present invention is to finish Zn-containing sulfide ore under lesser temps and pressure, leaches as high ferro or the pressurization that contains the arsenic zinc ore concentrate.Oxygen partial pressure is low in the leaching process, does not need to add sulphur content powder, and the sulphur in the mineral is oxidized to elementary sulfur rather than sulfuric acid.Zinc in the mineral is efficiently leached, and iron enters leached mud with the form of ferric oxide, and other detrimental impurity such as arsenic, antimony, bismuth also can be cured in the leached mud.Be simple, an efficient and eco-friendly technology that is used for Zn-containing sulfide ore or concentrate.
With following indefiniteness examples of implementation technology of the present invention is further described, helping understanding the present invention and advantage thereof, and as the qualification to protection domain of the present invention, protection scope of the present invention is determined by claims.
Example 1
The zinc ore concentrate of used leaching is formed (%): Zn 39.4%, and Fe 14.27%, and S 28.57%.
The pressurization leaching condition is: the zinc ore concentrate ore grinding accounted for more than 90% to granularity-44 μ m, gets the 100g sample ore, and 110 ℃ of extraction temperatures, oxygen partial pressure 300kPa, initial sulfuric acid concentration is 170g/l, liquid-solid ratio 4/1, the reaction times is 3 hours.The result of zinc, iron leaching yield is as follows.
Example 2
| Leaching yield % | |
| ?????Zn | ?????Fe |
| ????95.32 | ????13.50 |
The zinc ore concentrate of used leaching is formed (%): Zn 39.4%, and Fe 14.27%, and S 28.57%.The pressurization leaching condition is: the zinc ore concentrate ore grinding accounted for more than 90% to granularity-44 μ m, gets the 100g sample ore, and 110 ℃ of extraction temperatures, oxygen partial pressure 250kPa, initial sulfuric acid concentration is 140g/l, liquid-solid ratio 5/1, the reaction times is 4 hours.The result of zinc, iron leaching yield is as follows.
The zinc ore concentrate of example 3 used leachings is formed (%): Zn 50.73%, and Fe 3.65%, and S 27.19%.
| Leaching yield % | |
| ?????Zn | ?????Fe |
| ????97.10 | ????14.20 |
The pressurization leaching condition is: the zinc ore concentrate ore grinding accounted for more than 90% to granularity-44 μ m, gets the 100g sample ore, and 110 ℃ of extraction temperatures, oxygen partial pressure 500kPa, initial sulfuric acid concentration is 110g/l, liquid-solid ratio 6/1, the reaction times is 3 hours.The result of zinc, iron leaching yield is as follows.
| Leaching yield % | |
| ?????Zn | ?????Fe |
| ????96.40 | ????7.54 |
Example 4
The zinc ore concentrate of used leaching is formed (%): Zn 50.73%, and Fe 3.65%, and S 27.19%.
The pressurization leaching condition is: the zinc ore concentrate ore grinding accounted for more than 90% to granularity-44 μ m, gets the 100g sample ore, and 110 ℃ of extraction temperatures, oxygen partial pressure 400kPa, initial sulfuric acid concentration is 130g/l, liquid-solid ratio 5/1, the reaction times is 3 hours.The result of zinc, iron leaching yield is as follows.
| Leaching yield % | |
| ?????Zn | ?????Fe |
| ????95.50 | ????9.01 |
Example 5
The zinc ore concentrate of used leaching is formed (%): Zn 55.25%, and Fe 3.65%, and S 28.70%.
The pressurization leaching condition is: the zinc ore concentrate ore grinding accounted for more than 90% to granularity-44 μ m, gets the 100g sample ore, and 110 ℃ of extraction temperatures, oxygen partial pressure 500kPa, initial sulfuric acid concentration is 120g/l, liquid-solid ratio 6/1, the reaction times is 3 hours.The result of zinc, iron leaching yield is as follows.
| Leaching yield % | |
| ?????Zn | ?????Fe |
| ????95.69 | ????7.97 |
Example 6
The zinc ore concentrate of used leaching is formed (%): Zn 55.25%, and Fe 3.65%, and S 28.70%.The pressurization leaching condition is: the zinc ore concentrate ore grinding accounted for more than 90% to granularity-44 μ m, gets the 100g sample ore, and 110 ℃ of extraction temperatures, oxygen partial pressure 400kPa, initial sulfuric acid concentration is 140g/l, liquid-solid ratio 5/1, the reaction times is 3 hours.The result of zinc, iron leaching yield is as follows.
| Leaching yield % | |
| ?????Zn | ????Fe |
| ????96.12 | ???8.32 |
Claims (11)
1. one kind is extracted the method for zinc from Zn-containing sulfide ore, it is characterized in that its process is:
A) Zn-containing sulfide ore being milled to granularity is less than 50 μ m more than 90%;
B) mineral after will grinding leach adding under acid, the pressurized conditions, the ore pulp liquid-solid ratio that control is leached is 1-8: 1, initial sulfuric acid concentration is 50g/l-200g/l, the leaching total pressure is 200kPa-1000kPa, oxygen partial pressure is 100kPa-800kPa, temperature is 100 ℃-130 ℃, and extraction time is 1 hour-4 hours;
C) leach liquor is after deironing and substitution method purify, electrolysis production electricity zinc, and leached mud reclaims sulphur and lead respectively.
2. a kind of method from Zn-containing sulfide ore extraction zinc according to claim 1 is characterized in that the vitriolic starting point concentration that leaches is 100g/l-180g/l.
3. a kind of method from Zn-containing sulfide ore extraction zinc according to claim 1 is characterized in that the liquid-solid ratio that leaches is 4-6: 1.
4. a kind of method from Zn-containing sulfide ore extraction zinc according to claim 1 is characterized in that extraction temperature is 105 ℃-115 ℃.
5. a kind of method according to claim 1 from Zn-containing sulfide ore extraction zinc, it is characterized in that leaching total pressure is 300kPa-800kPa, oxygen partial pressure is 100kPa-300kPa.
6. a kind of method from Zn-containing sulfide ore extraction zinc according to claim 1 is characterized in that the purification of leaching liquor deironing is with the blowing air oxidation precipitation or uses the Manganse Dioxide deironing.
7. a kind of method from Zn-containing sulfide ore extraction zinc according to claim 1 is characterized in that the purification of leaching liquor deironing is to be connected with the zinc ore concentrate roasting-wet method smelting process of routine, removes iron at neutral extracting stage.
8. a kind of method of extracting zinc from Zn-containing sulfide ore according to claim 1, it is characterized in that this pressure leaching process and the neutral leaching-acidity of conventional zinc ore concentrate roasting-wet method smelting process leach combination, be used to handle zinc ore concentrate, the acid leach liquor that leaches output advances pressurization and leaches dosing, and the solution that output is leached in pressurization returns neutral the leaching.
9. according to claim 1ly a kind ofly extract the method for zinc from Zn-containing sulfide ore, the sulphur in the leached mud that it is characterized in that pressurizeing reclaims with the method for flotation, and desulfurization slag further reclaims lead.
10. according to claim 1 and the described method of claim 9, reclaim plumbous process in the leached mud that it is characterized in that pressurizeing, desulfurization slag is with bicarbonate of ammonia lead sulfate to be converted into lead carbonate, and the lead skim after transition send plumbous smelting system.
11. according to claim 1 and the described method of claim 9, the leached mud that it is characterized in that pressurizeing reclaims in the plumbous process, the pressurization leached mud is to adopt the suspension electrolysis art breading, and the solution of output returns pressurization and leaches, and slag is output spongy lead, elementary sulfur and finishing slag after ore dressing separates.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB011404841A CN1169977C (en) | 2001-12-10 | 2001-12-10 | Method for extracting zinc from zinc-containing sulfide minerals |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011404841A CN1169977C (en) | 2001-12-10 | 2001-12-10 | Method for extracting zinc from zinc-containing sulfide minerals |
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| CN1360064A true CN1360064A (en) | 2002-07-24 |
| CN1169977C CN1169977C (en) | 2004-10-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109554539A (en) * | 2018-12-26 | 2019-04-02 | 湖南柿竹园有色金属有限责任公司 | A kind of method of bismuth and copper and iron in pressurized acid leaching separation of Bismuth concentrate |
| CN114438322A (en) * | 2022-02-11 | 2022-05-06 | 长沙有色冶金设计研究院有限公司 | Method for removing manganese from high manganese zinc concentrate oxygen pressure leaching solution |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948960B (en) * | 2010-09-08 | 2012-02-29 | 广西大学 | Method for recovering lead from iron-containing lead smelting slag |
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2001
- 2001-12-10 CN CNB011404841A patent/CN1169977C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109554539A (en) * | 2018-12-26 | 2019-04-02 | 湖南柿竹园有色金属有限责任公司 | A kind of method of bismuth and copper and iron in pressurized acid leaching separation of Bismuth concentrate |
| CN114438322A (en) * | 2022-02-11 | 2022-05-06 | 长沙有色冶金设计研究院有限公司 | Method for removing manganese from high manganese zinc concentrate oxygen pressure leaching solution |
| CN114438322B (en) * | 2022-02-11 | 2024-01-30 | 长沙有色冶金设计研究院有限公司 | Method for removing manganese from oxygen pressure leaching solution of high-manganese zinc concentrate |
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