CN110396608A - A kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method - Google Patents
A kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method Download PDFInfo
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- CN110396608A CN110396608A CN201910710246.0A CN201910710246A CN110396608A CN 110396608 A CN110396608 A CN 110396608A CN 201910710246 A CN201910710246 A CN 201910710246A CN 110396608 A CN110396608 A CN 110396608A
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- China
- Prior art keywords
- sulfide concentrate
- sulfonic acid
- bismuth
- bismuth sulfide
- methane sulfonic
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/16—Extraction of metal compounds from ores or concentrates by wet processes by leaching in organic solutions
- C22B3/1608—Leaching with acyclic or carbocyclic agents
- C22B3/1616—Leaching with acyclic or carbocyclic agents of a single type
- C22B3/165—Leaching with acyclic or carbocyclic agents of a single type with organic acids
-
- 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
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/06—Obtaining bismuth
-
- 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
Abstract
The invention discloses a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching methods, include the following steps: S1, material pretreatment: bismuth sulfide concentrate is added in vertical grinder, fine grinding processing is carried out to bismuth sulfide concentrate with vertical grinder, it is spare after then being dried the material of screening；S2, match liquid: according to chalybeate phase and iron content in material, being properly added iron powder into methanesulfonic acid solution, then agitating solution, be sufficiently mixed iron powder with methanesulfonic acid solution, obtain iron-containing methane sulfonic acid leaching agent.The present invention roasts thermal process instead of traditional redox by using oxygen leaching technology, efficiently extract bismuth, also the generation of low-concentration sulfur dioxide is avoided from the root, and the leaching rate of the method that the present invention leaches bismuth sulfide concentrate, bismuth is high, up to 93% or more, and process flow is simple, this method is easy to operate, can efficiently dissolve out bismuth, sulfur product is obtained, and does not generate SO2, have environment-friendly advantage.
Description
Technical field
The present invention relates to non-ferrous metal hydrometallurgy correlative technology field, specially a kind of methane sulfonic acid system bismuth sulfide concentrate
Oxygen leaching method.
Background technique
Bismuth smelting process is divided into two class of pyrogenic process and wet process.Pyrogenic process refines bismuth and is suitable for the higher raw material of bismuth-containing, concrete technology packet
Include liquate melting, precipitating melting, reduction melting, mixed smelting and low-temperature alkali melting.Such as Chinese patent CN103305707A
Disclose a kind of smelting process of bismuth concentrate；Sulphur-fixing agent is cooked with metal oxide, sodium carbonate does reaction dissolvent, and carbon restores
Agent obtains thick bismuth in 750-950 DEG C of meltings；This method can efficiently obtain thick bismuth, and equipment is simple, with short production cycle, but also deposits
In low concentration SO2The problems such as smoke pollution, the valuable metals such as tungsten are difficult to effectively recycle, and equipment automatization level is low.
Wet process refining bismuth technique lower, complicated component bismuth-containing material suitable for grade, it is more typical to have ferric trichloride leaching
Method, chlorine selectively leaching method, hydrochloric acid-nitrous acid leaching process, chlorinolysis, slurry electrolysis etc., these methods mostly use
FeCl3, chlorine or nitric acid etc. be used as oxidant and complexant Oxidation Leaching, make S2-It is converted into elemental sulfur, to make bismuth with ion
Form enter in leachate.Bismuth sulfide ore is put into band diaphragm anode region by Chinese patent CN1415785, with anode production
Chlorine leaching bismuth sulfide, so that bismuth is entered electrolyte with ionic state, subsequent bismuth ion is precipitated on cathode by diaphragm, obtains gold
Belong to bismuth meal.The chlorine that this method anode is easy production is easy evolution, degradation manipulation environment, and iron is enriched in the solution, it is difficult to locate
Reason.Chinese patent CN101775619A is with NaClO3For oxidant, the normal pressure leaching bismuth sulfide in hydrochloric acid system, removal of impurities of evolving
Afterwards, bismuth and regenerating oxidant are recycled by diaphragm electrolysis.This method long flow path, accompanying element are largely leached, and purification and impurity removal is difficult
Degree is big, and a large amount of alkali are consumed during diaphragm electrodeposition.
Oxygen leaching technique is used primarily for processing nickel ore concentrate and copper concentrate, later as one of strengthening through metallurgy process
It is generalized to the technique of processing zinc sulfide concentrates；Sulphide ore oxygen leaching technique is that sulfidation roasting and calcining are leached twice technique to close
And completed at one of technique, leach sulphur in raw material in the form of elemental sulfur in leaching process, and ion enters in leachate.
Chinese patent CN109554539A and CN109554540A are respectively by using H2SO4With ammonium hydroxide as medium is leached, in high temperature height
Pressure leaching bismuth is depressed, then thick bismuth is obtained by fire reduction melting or wet process HCl normal pressure leaching prepares bismuth oxychloride or oxidation
Bismuth；Process is complex, and larger using subsequent reduction melting energy consumption, HCl is strong to equipment corrosion, is not convenient to use.
It is difficult to meet the increasingly serious environmental requirement of country and existing for the refining bismuth technique of existing pyrogenic process and wet process
Certain defective workmanship, the present invention provide a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching work.
Summary of the invention
It is above-mentioned to solve the purpose of the present invention is to provide a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method
Bismuth leaching rate present in the existing bismuth smelting process mentioned in background technique is low, and operating procedure is complicated, and pollutes height, to equipment
High, the at high cost problem of corrosivity.
To achieve the above object, the invention provides the following technical scheme: a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen pressure
Leaching method includes the following steps:
S1, material pretreatment: bismuth sulfide concentrate is added in vertical grinder, fine grinding is carried out to bismuth sulfide concentrate with vertical grinder
Processing, it is spare after then being dried the material of screening；
S2, match liquid: according to chalybeate phase and iron content in material, being properly added iron powder into methanesulfonic acid solution, then stir
Solution is sufficiently mixed iron powder with methanesulfonic acid solution, obtains iron-containing methane sulfonic acid leaching agent；
S3, mixing: iron-containing methane sulfonic acid leaching agent is mixed with pretreated complicated bismuth sulfide concentrate and is sized mixing, is then added
Into autoclave, while surfactant is added, is then stirred；Wherein, mixing speed is 80~1400 revs/min；
S4, Leach reaction: in the case where autoclave is kept stirring, autoclave heat temperature raising adds the ore pulp in autoclave
Temperature arrives set temperature, then passes to oxygen, starts oxygen leaching reaction, and reaction is separated by solid-liquid separation after 1-6 hours, is soaked
It slags tap and bismuth-containing leachate.
Preferably, bismuth mass percentage is 15-35% in the bismuth sulfide concentrate, and sulphur mass percentage is 15-
35%, weight of iron percentage composition is 15-35%.
Preferably, after the bismuth sulfide concentrate wet ground, the partial size of bismuth sulfide concentrate is in 3-100um.
Preferably, 3-7g/L of iron content, 260-380g/L containing methane sulfonic acid in the iron-containing methane sulfonic acid leaching agent
Preferably, surfactant is added in leaching process, wherein the surfactant is calcium lignosulfonate, lignin
It is sodium sulfonate, lignite, any in quebracho, and the dosage of surfactant is 0.1-the 0.9% of bismuth concentrate material quality.
Preferably, the extraction temperature is 50-150 DEG C.
Preferably, the leaching partial pressure of oxygen is 0.4-1.5MPa.
Preferably, the extraction time is 1-6h.
The present invention provides a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method, have it is following the utility model has the advantages that
(1) present invention roasts thermal process instead of traditional redox using oxygen leaching technology, efficiently extracts bismuth,
Also the generation of low-concentration sulfur dioxide is avoided from the root, the leaching rate of the method that the present invention leaches bismuth sulfide concentrate, bismuth is high,
Up to 93% or more, this method is easy to operate, can efficiently dissolve out bismuth, obtains sulfur product, and do not generate SO2, it is excellent to have environmental protection
Gesture.
(2) present invention uses methane sulfonic acid for Leaching Systems, and bismuth dissolubility height, small toxicity, corrosivity are small, reduces to ring
The pressure in border, also extension service life of equipment appropriate, and then production cost greatly reduces, so that the technique is extensive
Industrial applications when, have apparent advantage.
Specific embodiment
Embodiment 1:
Technological principle of the invention is as follows:
2Bi2S3+12CH3SO3H+3O2=4Bi(CH3SO3)3+6S0+6H2O
A kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method, includes the following steps:
125g bismuth sulfide concentrate (containing Bi23%) is taken, ore grinding work is carried out, bismuth sulfide concentrate is milled to 97%, is less than granularity of concentrate
30 μm, the leaching agent of 400g/L containing methane sulfonic acid, iron 9g/L is added, makes the volume of liquid and the mass ratio 8:1 of solid, so
After surfactant is added, wherein surfactant use calcium lignosulfonate, be added in an amount of the 0.7% of material quality, will match
Autoclave is added in the ore pulp of system, while autoclave is heated to 135 DEG C, and controls temperature and stablize at 135 DEG C, then passes to oxygen
Gas, pressure 1.0MPa, carry out oxygen leaching process, carry out after reaction by 400 revs/min of mixing speed, reaction time 2h
Solid-liquor separation.
Embodiment 2:
Technological principle of the invention is as follows:
2Bi2S3+12CH3SO3H+3O2=4Bi(CH3SO3)3+6S0+6H2O
A kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method, includes the following steps:
125g bismuth sulfide concentrate (containing Bi 23%) is taken, ore grinding work is carried out, bismuth sulfide concentrate is milled to 97%, keeps granularity of concentrate small
In 50 μm, the leaching agent of 280g/L containing methane sulfonic acid, iron 9g/L is added, makes the volume of liquid and the mass ratio 8:1 of solid,
Then it is added surfactant, wherein surfactant uses sodium lignin sulfonate, and sodium lignin sulfonate is added in an amount of
The ore pulp of preparation is added in autoclave, while autoclave is heated to 135 DEG C, and it is steady to control temperature by the 0.7% of material quality
135 DEG C are scheduled on, oxygen is then passed to, pressure 1.0MPa, carries out oxygen pressure leaching by 400 revs/min of mixing speed, reaction time 2h
Process out carries out solid-liquor separation after reaction.
Embodiment 3:
Technological principle of the invention is as follows:
2Bi2S3+12CH3SO3H+3O2=4Bi(CH3SO3)3+6S0+6H2O
A kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method, includes the following steps:
100g bismuth sulfide concentrate (containing Bi23%) is taken, ore grinding work is carried out, bismuth sulfide concentrate is milled to 97%, is less than granularity of concentrate
30 μm, 300g/L containing methane sulfonic acid, iron 5g/L leaching agent is added, makes the volume of liquid and the mass ratio 10:1 of solid, so
After surfactant is added, wherein surfactant uses lignite, and be added in an amount of material quality 0.6% of lignite will prepare
Ore pulp autoclave is added, while autoclave is heated to 90 DEG C, and control temperature and stablize at 90 DEG C, then passes to oxygen, control
Pressure 0.8MPa in autoclave processed, reaction time 2h carry out oxygen leaching process, carry out solid-liquor separation after reaction.
Embodiment 4:
Technological principle of the invention is as follows:
2Bi2S3+12CH3SO3H+3O2=4Bi(CH3SO3)3+6S0+6H2O
A kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method, includes the following steps:
250g bismuth sulfide concentrate (containing Bi23%) is taken, ore grinding work is carried out, bismuth sulfide concentrate is milled to 97%, is less than granularity of concentrate
30 μm, the leaching agent of 280g/L containing methane sulfonic acid, iron 3g/L is added, makes the volume of liquid and the mass ratio 4:1 of solid, so
After surfactant is added, wherein surfactant uses quebracho, and quebracho is added in an amount of material quality
0.7%, autoclave is added in the ore pulp of preparation, while autoclave is heated to 110 DEG C, and control temperature and stablize at 110 DEG C, so
After be passed through oxygen, control autoclave in pressure 1.0MPa, 400 revs/min of mixing speed, reaction time 3h, carry out oxygen leaching
Process carries out solid-liquor separation after reaction.
It is as shown in the table that data are obtained according to embodiment 1-4:
| 1. embodiment | 2. bismuth leaching rate | 3. slag bismuth-containing |
| 4. embodiment 1 | 5. 96.8% | 6. 2.4% |
| 7. embodiment 2 | 8. 86.7% | 9. 5.7% |
| 10. embodiment 3 | 11. 91.67% | 12. 3.6% |
| 13. embodiment 4 | 14. 88.7% | 15. 5.1% |
Use oxygen leaching technology of the invention can be obtained by experimental data, the leaching rate of bismuth is high, and bismuth-containing amount is low in slag, this method
It is easy to operate, bismuth can be efficiently dissolved out, sulfur product is obtained, and do not generate SO2, has environment-friendly advantage, convenient for promoting and using.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method, which comprises the steps of:
S1, material pretreatment: bismuth sulfide concentrate is added in vertical grinder, fine grinding is carried out to bismuth sulfide concentrate with vertical grinder
Processing, it is spare after then being dried the material of screening；
S2, match liquid: according to chalybeate phase and iron content in material, being properly added iron powder into methanesulfonic acid solution, then stir
Solution is sufficiently mixed iron powder with methanesulfonic acid solution, obtains iron-containing methane sulfonic acid leaching agent；
S3, mixing: iron-containing methane sulfonic acid leaching agent is mixed with pretreated complicated bismuth sulfide concentrate and is sized mixing, is then added
Into autoclave, while surfactant is added, is then stirred；Wherein, mixing speed is 80~1400 revs/min；
S4, Leach reaction: in the case where autoclave is kept stirring, autoclave heat temperature raising adds the ore pulp in autoclave
Temperature arrives set temperature, then passes to oxygen, starts oxygen leaching reaction, and reaction is separated by solid-liquid separation after 1-6 hours, is soaked
It slags tap and bismuth-containing leachate.
2. a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method according to claim 1, which is characterized in that institute
Stating bismuth mass percentage in bismuth sulfide concentrate is 15-35%, and sulphur mass percentage is 15-35%, weight of iron percentage composition
It is 15-35%.
3. a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method according to claim 1, which is characterized in that institute
After stating bismuth sulfide concentrate wet ground, the partial size of bismuth sulfide concentrate is in 3-100um.
4. a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method according to claim 1, which is characterized in that
0-9g/L of iron content, 250-600 g/L containing methane sulfonic acid in the iron-containing methane sulfonic acid leaching agent.
5. a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method according to claim 1, which is characterized in that In
Surfactant is added in leaching process, wherein the surfactant be calcium lignosulfonate, sodium lignin sulfonate, lignite,
It is any in quebracho, and the dosage of surfactant is 0.1-the 0.9% of bismuth concentrate material quality.
6. a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method according to claim 1, which is characterized in that institute
Stating extraction temperature is 50-150 DEG C.
7. a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method according to claim 1, which is characterized in that institute
Stating and leaching partial pressure of oxygen is 0.4-1.5MPa.
8. a kind of methane sulfonic acid system bismuth sulfide concentrate oxygen leaching method according to claim 1, which is characterized in that institute
Stating extraction time is 1-6h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910710246.0A CN110396608B (en) | 2019-08-02 | 2019-08-02 | Oxygen pressure leaching method for bismuth sulfide concentrate in methanesulfonic acid system |
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| CN201910710246.0A CN110396608B (en) | 2019-08-02 | 2019-08-02 | Oxygen pressure leaching method for bismuth sulfide concentrate in methanesulfonic acid system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480862A (en) * | 2022-01-25 | 2022-05-13 | 长沙有色冶金设计研究院有限公司 | Method for recovering valuable elements from copper dross |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130252798A1 (en) * | 2012-03-21 | 2013-09-26 | National Tsing Hua University | Metallic sulfide photocatalyst for carbon dioxide reduction and the preparation for the same |
| CN105779789A (en) * | 2016-03-11 | 2016-07-20 | 中南大学 | Wet method for separating bismuth from antimony |
| CN105886797A (en) * | 2015-01-25 | 2016-08-24 | 昆明冶金高等专科学校 | Method for preparing sponge indium from polymetallic sulfide material |
| CN106834679A (en) * | 2017-02-22 | 2017-06-13 | 中南大学 | The method that lead in concentrate of lead sulfide ore is leached in two sections of adverse current pressure oxidations of sulfonic acid solutions |
| CN109913647A (en) * | 2019-04-25 | 2019-06-21 | 江西自立环保科技有限公司 | A kind of wet treatment method recycling copper, zinc in bismuth chats |
-
2019
- 2019-08-02 CN CN201910710246.0A patent/CN110396608B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130252798A1 (en) * | 2012-03-21 | 2013-09-26 | National Tsing Hua University | Metallic sulfide photocatalyst for carbon dioxide reduction and the preparation for the same |
| CN105886797A (en) * | 2015-01-25 | 2016-08-24 | 昆明冶金高等专科学校 | Method for preparing sponge indium from polymetallic sulfide material |
| CN105779789A (en) * | 2016-03-11 | 2016-07-20 | 中南大学 | Wet method for separating bismuth from antimony |
| CN106834679A (en) * | 2017-02-22 | 2017-06-13 | 中南大学 | The method that lead in concentrate of lead sulfide ore is leached in two sections of adverse current pressure oxidations of sulfonic acid solutions |
| CN109913647A (en) * | 2019-04-25 | 2019-06-21 | 江西自立环保科技有限公司 | A kind of wet treatment method recycling copper, zinc in bismuth chats |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480862A (en) * | 2022-01-25 | 2022-05-13 | 长沙有色冶金设计研究院有限公司 | Method for recovering valuable elements from copper dross |
| CN114480862B (en) * | 2022-01-25 | 2024-01-30 | 长沙有色冶金设计研究院有限公司 | Method for recovering valuable elements from copper dross |
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