CN101619389B - Method for extracting lead from lead sulfide ore concentrate by HCl-O2-NaCl system - Google Patents
Method for extracting lead from lead sulfide ore concentrate by HCl-O2-NaCl system Download PDFInfo
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- CN101619389B CN101619389B CN2009100440227A CN200910044022A CN101619389B CN 101619389 B CN101619389 B CN 101619389B CN 2009100440227 A CN2009100440227 A CN 2009100440227A CN 200910044022 A CN200910044022 A CN 200910044022A CN 101619389 B CN101619389 B CN 101619389B
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Abstract
The invention relates to a method for producing rough lead by the direct low temperature melting of solid lead chloride. The method is characterized by comprising the following steps: (1) firstly, mixing solid lead chloride, fusing agent and reducing agent; (2) adding the mixture into a turning short kiln to carry out low-temperature smelting so as to produce rough lead, slag, flue dust and flue gas; (3) carrying out water leaching on the slag and the flue dust produced by the low-temperature smelting, producing leached slag and leached fluid by solid and fluid separation, keeping the leached slag to be processed, evaporating and concentrating the leached fluid and producing the solid lead chloride. The fusing agent used by the invention is calcium carbonate, and the reducing agent used by the invention is coke powder or coal powder. The invention has the characteristics of low production cost, energy consumption and flue dust rate, high efficiency and lead direct yield, less lead volatilizing content, and the like.
Description
Technical field
The present invention relates to a kind of method of wet-leaching lead, particularly relate to a kind of employing HCl-O
2-NaCl system is processed the chlorination leaching method of concentrate of lead sulfide ore, belongs to wet method and refines plumbous technical field.
Background technology
Along with the development of refining plumbing, countries in the world are more and more stricter in the requirement aspect environmental protection to pyrometallurgical smelting of lead technique, and the bake with agglomeration-retailoring tradition pyrometallurgical smelting of lead technique that damage ratio is more serious is prohibited from using gradually.Although the modern oxygen smelting techniques such as Kivect, the QSL of exploitation, SKS have solved SO in recent years
2The flue gas acid preparing problem, but also exist following deficiency: the first, can not thoroughly eliminate SO
2The pollution to environment of flue gas and leaded flue dust; The second, be not suitable for processing low-grade and complicated concentrate of lead sulfide ore.Just because of this, people are paying close attention to always and are expecting that wet method refines the breakthrough of plumbous technology.
At present, adopting wet processing to extract plumbous research from concentrate of lead sulfide ore mainly comprises following several: Oxidation Leaching method, alkali lixiviation process, amine lixiviation process reach and contain ammoniacal ammonium sulphate lixiviation process etc.In aforesaid method, iron trichloride leach concentrate of lead sulfide ore studied at most, be also the leaching method be hopeful most in industrial application.
Leach concentrate of lead sulfide ore with iron trichloride, no matter be low temperature conversion, or high temperature leaches, and speed of response is all very fast, and leaching yield is high.But also there is following problem in the method: the one, and liquor ferri trichloridi has certain corrodibility, and equipment anticorrosion is had relatively high expectations; The 2nd, need to consume a large amount of chlorine in the iron trichloride regenerative process, the effusion of chlorine and leakage can cause Working environment to worsen; The 3rd, chlorine is expensive, and production cost is higher.
Summary of the invention
The object of the invention is to overcome pollution and the high deficiency of processing low-grade vulcanized lead Concentrate cost that current thermal process is processed the environment of concentrate of lead sulfide ore existence, and leach for iron trichloride the problem that concentrate of lead sulfide ore exists, propose a kind of brand-new concentrate of lead sulfide ore chlorination and leach novel method.
The technical solution that the present invention provides consists of following steps:
(1) at first granularity is inserted in reactive tank by solid-to-liquid ratio=1: 2.5～5 for the concentrate of lead sulfide ore that-200 orders account for 80%-90%, carry out the solid phase transformation reaction under cupric ion catalyzer, oxygen and hydrochloric acid effect, wherein catalyst levels is controlled at 1g/L～1.5g/L, temperature of reaction is 40 ℃～75 ℃, the pH value of solution is controlled at 0.5～1, oxygen flow is 200ml/min, and the reaction times is not less than 4h;
(2) after reaction finishes, solution is cooled to room temperature, then, carries out solid-liquid separation, obtain conversion fluid and solid phase transformation slag, conversion fluid is pending, and the conversion slag proceeds to next procedure and leached;
(3) the solid phase transformation slag is inserted in leaching vat and carried out Leaching of sodium chloride by solid-to-liquid ratio=1: 4～8, sodium chloride concentration 4.5-5mol/L, 90 ℃-95 ℃ of extraction temperatures, extraction time is 3～6h;
(4) after Leaching reaction finishes, carry out solid-liquid separation, obtain leach liquor and leached mud, leached mud is pending, and leach liquor is through crystallisation by cooling output solid lead chloride.
In technique scheme, the present invention uses HCl to make leaching agent, O
2Make oxygenant, under the effect of catalyzer cupric ion, the lead in concentrate of lead sulfide ore is transformed into to the solid lead chloride and enters in the solid phase transformation slag, transform slag after sodium chloride aqueous solution leaches, the solid lead chloride is transformed into to PbCl
4 2-Enter leach liquor, leach liquor is through crystallisation by cooling output solid lead chloride.
Leach the concentrate of lead sulfide ore method with iron trichloride and compare, advantage of the present invention is: corrodibility is little, less demanding to equipment anticorrosion; Operating environment is good; Leaching agent (hydrochloric acid) can be by the dchlorine metallurgy process regeneration of next procedure, oxygenant (oxygen) low price, and production cost is lower.With pyrogenic attack concentrate of lead sulfide ore technique, compare, advantage of the present invention is: whole production process is without SO
2Flue gas and leaded flue dust produce, environmentally safe; Can process the concentrate of lead sulfide ore of high, medium and low grade, stronger to the suitability of raw material.
The accompanying drawing explanation
Accompanying drawing is process flow sheet of the present invention
Specific embodiments
Now, in conjunction with Figure of description and embodiment, a kind of HCL-O2-NaCl of employing system that the present invention is provided is described further from the method for concentrate of lead sulfide ore leaching lead.
Embodiment 1
By the concentrate of lead sulfide ore of 500Kg by solid-to-liquid ratio=insert in reactive tank at 1: 4, at the cupric ion catalyzer, carry out the solid phase transformation reaction under oxygen and hydrochloric acid effect, wherein catalyst levels is 1.25g/L, temperature of reaction is 70 ℃, the pH value of solution is 0.5～1, oxygen flow is 200ml/min, reaction times 7h, reaction finishes, after being cooled to room temperature, solution carries out solid-liquid separation, the solid phase transformation slag is inserted in leaching vat and carried out Leaching of sodium chloride by solid-to-liquid ratio at 1: 4, sodium chloride concentration 6mol/L wherein, 90 ℃ of extraction temperatures, extraction time is 4h, after Leaching reaction finishes, carry out solid-liquid separation, leach liquor is through crystallisation by cooling output solid lead chloride.
Result: plumbous leaching yield 98.58%
Sulphur leaching yield 12.23%
Silver leaching rate 19%
The production rate 92.42% of solid lead chloride
Embodiment 2
By the concentrate of lead sulfide ore of 500Kg by solid-to-liquid ratio=insert in reactive tank at 1: 3, at catalyzer, carry out the solid phase transformation reaction under oxygen and hydrochloric acid effect, wherein catalyst levels is 1.45g/L, temperature of reaction is 70 ℃, the pH value of solution is 0.5～1, oxygen flow is 200ml/min, reaction times 6.5h, reaction finishes, after being cooled to room temperature, solution carries out solid-liquid separation, the solid phase transformation slag is inserted in leaching vat and carried out Leaching of sodium chloride by solid-to-liquid ratio at 1: 4, sodium chloride concentration 6mol/L wherein, 95 ℃ of extraction temperatures, extraction time is 4h, after Leaching reaction finishes, carry out solid-liquid separation, leach liquor is through crystallisation by cooling output solid lead chloride.
Result: plumbous leaching yield 98.75%
Sulphur leaching yield 12.31%
Silver leaching rate 21%
The production rate 92.54% of solid lead chloride
Embodiment 3
By the concentrate of lead sulfide ore of 500Kg by solid-to-liquid ratio=insert in reactive tank at 1: 4, at catalyzer, carry out the solid phase transformation reaction under oxygen and hydrochloric acid effect, wherein catalyst levels is 1.35g/L, temperature of reaction is 65 ℃, the pH value of solution is 0.5～1, oxygen flow is 200ml/min, reaction times 7h, reaction finishes, after being cooled to room temperature, solution carries out solid-liquid separation, the solid phase transformation slag is inserted in leaching vat and carried out Leaching of sodium chloride by solid-to-liquid ratio at 1: 4, sodium chloride concentration 6mol/L wherein, 93 ℃ of extraction temperatures, extraction time is 4h, after Leaching reaction finishes, carry out solid-liquid separation, leach liquor is through crystallisation by cooling output solid lead chloride.
Result: plumbous leaching yield 98.23%
Sulphur leaching yield 11.34%
Silver leaching rate 19.5%
The production rate 92.3% of solid lead chloride
Claims (1)
1. one kind adopts HCl-O
2-NaCl system, from the method for concentrate of lead sulfide ore leaching lead, is characterized in that the concrete technology method is:
(1) at first granularity for accounting for 80%-90% concentrate of lead sulfide ore ,-200 orders is inserted in reactive tank by solid-to-liquid ratio=1:2.5 ~ 5, carry out the solid phase transformation reaction under cupric ion catalyzer, oxygen and hydrochloric acid effect, wherein catalyst levels is controlled at 1 g/L ~ 1.5g/L, temperature of reaction is 40 ℃ ~ 75 ℃, the pH value of solution is controlled at 0.5 ~ 1, oxygen flow is 200ml/min, and the reaction times is not less than 4h;
(2) after reaction finishes, solution is cooled to room temperature, then, carries out solid-liquid separation, obtain conversion fluid and solid phase transformation slag, conversion fluid is pending, and the conversion slag proceeds to next procedure and leached;
(3) the solid phase transformation slag is inserted in leaching vat and carried out Leaching of sodium chloride by solid-to-liquid ratio=1:4 ~ 8, sodium chloride concentration 4.5-5mol/L, 90 ℃-95 ℃ of extraction temperatures, extraction time is 3 ~ 6h;
(4) after Leaching reaction finishes, carry out solid-liquid separation, obtain leach liquor and leached mud, leached mud is pending, and leach liquor is through crystallisation by cooling output solid lead chloride.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100440227A CN101619389B (en) | 2009-08-03 | 2009-08-03 | Method for extracting lead from lead sulfide ore concentrate by HCl-O2-NaCl system |
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| CN2009100440227A CN101619389B (en) | 2009-08-03 | 2009-08-03 | Method for extracting lead from lead sulfide ore concentrate by HCl-O2-NaCl system |
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| CN101619389B true CN101619389B (en) | 2013-12-04 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102560108A (en) * | 2010-12-07 | 2012-07-11 | 沈阳有色金属研究院 | Method for leaching lead sulfide concentrate by using hydrochloric acid-oxygen-magnesium chloride system |
| CN104789790B (en) * | 2015-04-08 | 2016-08-17 | 吉林吉恩镍业股份有限公司 | The unleaded smelting process of the leaded Gold Concentrate under Normal Pressure of Nelson's gravity treatment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3929597A (en) * | 1974-05-17 | 1975-12-30 | Hecla Mining Co | Production of lead and silver from their sulfides |
| CN1037739A (en) * | 1988-05-17 | 1989-12-06 | 沈阳矿冶研究所 | A kind of novel process of wet lead-smelting |
| CN1268579A (en) * | 2000-01-15 | 2000-10-04 | 昆明理工大学 | New process for treating electrolytic anode mud |
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- 2009-08-03 CN CN2009100440227A patent/CN101619389B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3929597A (en) * | 1974-05-17 | 1975-12-30 | Hecla Mining Co | Production of lead and silver from their sulfides |
| CN1037739A (en) * | 1988-05-17 | 1989-12-06 | 沈阳矿冶研究所 | A kind of novel process of wet lead-smelting |
| CN1268579A (en) * | 2000-01-15 | 2000-10-04 | 昆明理工大学 | New process for treating electrolytic anode mud |
Non-Patent Citations (2)
| Title |
|---|
| 尹文新等.湿法炼铅研究进展.《矿冶》.2005,第14卷(第3期),第49-53页. |
| 湿法炼铅研究进展;尹文新等;《矿冶》;20050930;第14卷(第3期);第49-53页 * |
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