CN102757023B - Method for recovering selenium from lead smelting soot - Google Patents
Method for recovering selenium from lead smelting soot Download PDFInfo
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- CN102757023B CN102757023B CN201210255076.XA CN201210255076A CN102757023B CN 102757023 B CN102757023 B CN 102757023B CN 201210255076 A CN201210255076 A CN 201210255076A CN 102757023 B CN102757023 B CN 102757023B
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Abstract
The invention discloses a method for recovering selenium from lead smelting soot. The method comprises the following steps of: firstly leaching lead smelting soot by adopting warm water, performing filter pressing on the lead smelting soot by adopting a plate-and-frame filter press after leaching, adding filtrate into a replacement tank after filter pressing, adding sulfuric acid, then adding gas sulphur dioxide for replacement reaction, and carrying out solid-liquid separation after replacement precipitation to produce coarse selenium. The method is used for recovering non-ferrous metal in the soot under the circumstance of less investment, and can recover selenium in the soot so as to improve the utilization ratio of resources and increase the enterprise benefits.
Description
Technical field
The present invention relates to a kind for the treatment of process of refining the plumbous smelting ash producing in plumbous industry, particularly relate to a kind of method that reclaims selenium from plumbous smelting ash.
Background technology
In the technological process of pyrometallurgical smelting of lead, produced a large amount of plumbous smelting ashs, and plumbous smelting in bottom blowing cigarette ash contained a certain amount of selenium.At present, owing to lacking effective and reasonable recovery technology, selenium in its plumbous smelting ash is not carried out to efficient recovery, thereby caused the waste of a large amount of selenium resources.
At present, along with petering out of resource, the minimizing day by day of profit margin, industrial and mining enterprises should reclaim the nonferrous metal resource of association as far as possible, improve the utilization ratio of resource, become the common problem that heavy non-ferrous metal smelting industry faces.For the common problem can fine solution facing, need the recovery technology problem of some heavy metals in heavy non-ferrous metal smelting process that development research is relevant.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method that reclaims selenium from plumbous smelting ash.The inventive method is a kind of in the situation that investment is less, reclaims the method for the non-ferrous metal in cigarette ash, can reclaim the selenium in cigarette ash, improves resource utilization, increases the performance of enterprises.
In order to address the above problem, the technical solution used in the present invention is:
The method that reclaims selenium from plumbous smelting ash of the present invention, described recovery method comprises the following steps:
A, adopt warm water to dissolve leaching plumbous smelting ash;
After b, plumbous smelting ash leach, with plate-and-frame filter press, carry out press filtration, thereby realize solid-liquid separation;
C, filtrate after filtration is added to the vitriol oil in proportion, making solution sulfuric acid concentration is 10-40%, then with sulfur dioxide gas, carries out replacement(metathesis)reaction, and the add-on of sulfurous gas is 1.2～1.3 times of the theoretical requirement of replacement(metathesis)reaction, sulfurous gas pressure is 0.02-0.05 MPa, and temperature is normal temperature.Displace the selenium in solution, last solid-liquid separation obtains thick selenium product.
Described in described step a, leaching liquid is warm water, and temperature is 35～45 ℃, and leaching liquid-solid ratio is 1:4-5, and leaching pressure is normal pressure, and extraction time is 3-4h.
Described in described step b, solid-liquid separating method is plate-and-frame filter press press filtration, and press filtration pressure is 0.6MPa.
Described in described step c, from filtrate, reclaim the method for selenium for filtrate after filtration is added to the vitriol oil in proportion, making solution sulfuric acid concentration is 10-40%, then with sulfurous gas, carries out precipitin reaction; The add-on of described sulfurous gas is 1.2 times of the theoretical requirement of replacement(metathesis)reaction, and pressure is 0.02-0.05 MPa.
positive beneficial effect of the present invention:
1, utilize the selenium in can the efficient recovery plumbous smelting ash of the inventive method.Adopt the inventive method to reclaim the selenium in plumbous smelting ash, its cost of investment is low, and safety and environmental protection.
2, adopt the inventive method to carry out effective recycling to the selenium in its plumbous smelting ash, thereby improved the utilization ratio of resource, increased the performance of enterprises.Thereby the present invention has significant economic benefit and social benefit.
Embodiment
Following examples only, in order to further illustrate the present invention, do not limit content of the present invention.
Embodiment 1
The detailed step of the method that reclaims selenium from plumbous smelting ash of the present embodiment is as follows:
A, adopt warm water to dissolve leaching plumbous smelting ash, the temperature of described warm water is 36 ℃, and leaching liquid-solid ratio is 1:4.2, and leaching pressure is normal pressure, extraction time 3.5h;
B, plumbous smelting ash leach the common plate-and-frame filter press of rear use and carry out press filtration, thereby realize solid-liquid separation.Plate-and-frame filter press press filtration pressure is 0.6MPa;
C, filtrate after filtration is added to the vitriol oil in proportion, making solution sulfuric acid concentration is 15%, then with sulfur dioxide gas, carries out replacement(metathesis)reaction, and the add-on of sulfurous gas is 11.3 times of the theoretical requirement of replacement(metathesis)reaction, sulfurous gas pressure is 0.02 MPa, and temperature is normal temperature.Displace the selenium in solution, last solid-liquid separation obtains thick selenium product.
Embodiment 2
The detailed step of the method that reclaims selenium from plumbous smelting ash of the present embodiment is as follows:
A, adopt warm water to dissolve leaching plumbous smelting ash, the temperature of described warm water is 39 ℃, and leaching liquid-solid ratio is 1:4.7, and leaching pressure is normal pressure, extraction time 3.7h;
B, plumbous smelting ash leach the common plate-and-frame filter press of rear use and carry out press filtration, thereby realize solid-liquid separation.Plate-and-frame filter press press filtration pressure is 0.6MPa;
C, filtrate after filtration is added to the vitriol oil in proportion, making solution sulfuric acid concentration is 10-40%, then with sulfur dioxide gas, carries out replacement(metathesis)reaction, and the add-on of sulfurous gas is 1.27 times of the theoretical requirement of replacement(metathesis)reaction, sulfurous gas pressure is 0.04 MPa, and temperature is normal temperature.Displace the selenium in solution, last solid-liquid separation obtains thick selenium product.
Embodiment 3
The detailed step of the method that reclaims selenium from plumbous smelting ash of the present embodiment is as follows:
A, adopt warm water to dissolve leaching plumbous smelting ash, the temperature of described warm water is 39 ℃, and leaching liquid-solid ratio is 1:4.8, and leaching pressure is normal pressure, extraction time 3.6h;
B, plumbous smelting ash leach the common plate-and-frame filter press of rear use and carry out press filtration, thereby realize solid-liquid separation.Plate-and-frame filter press press filtration pressure is 0.6MPa;
C, filtrate after filtration is added to the vitriol oil in proportion, making solution sulfuric acid concentration is 22%, then with sulfur dioxide gas, carries out replacement(metathesis)reaction, and the add-on of sulfurous gas is 1.28 times of the theoretical requirement of replacement(metathesis)reaction, sulfurous gas pressure is 0.04 MPa, and temperature is normal temperature.Displace the selenium in solution, last solid-liquid separation obtains thick selenium product.
Embodiment 4
The method of selenium that reclaims from plumbous smelting ash of the present embodiment, the detailed step of described recovery method is as follows:
A, adopt warm water to dissolve leaching plumbous smelting ash, the temperature of described warm water is 42 ℃, and leaching liquid-solid ratio is 1:4.1, and leaching pressure is normal pressure, extraction time 3-4h;
B, plumbous smelting ash leach the common plate-and-frame filter press of rear use and carry out press filtration, thereby realize solid-liquid separation.Plate-and-frame filter press press filtration pressure is 0.6MPa;
C, filtrate after filtration is added to the vitriol oil in proportion, making solution sulfuric acid concentration is 30%, then with sulfur dioxide gas, carries out replacement(metathesis)reaction, and the add-on of sulfurous gas is 1.3 times of the theoretical requirement of replacement(metathesis)reaction, sulfurous gas pressure is 0.02MPa, and temperature is normal temperature.Displace the selenium in solution, last solid-liquid separation obtains thick selenium product.
Claims (1)
1. from plumbous smelting ash, reclaim a method for selenium, it is characterized in that, described recovery method comprises the following steps:
A, adopt warm water to dissolve leaching plumbous smelting ash;
After b, plumbous smelting ash leach, with plate-and-frame filter press, carry out press filtration, thereby realize solid-liquid separation;
C, filtrate after filtration is added to the vitriol oil in proportion, making solution sulfuric acid concentration is 10-40%, then with sulfur dioxide gas, carry out replacement(metathesis)reaction, the add-on of sulfurous gas is 1.2～1.3 times of the theoretical requirement of replacement(metathesis)reaction, sulfurous gas pressure is 0.02-0.05 MPa, temperature is normal temperature, displaces the selenium in solution, and last solid-liquid separation obtains thick selenium product;
In step a, leaching liquid is warm water, and temperature is 35～45 ℃, and leaching liquid-solid ratio is 1:4-5, and leaching pressure is normal pressure, and extraction time is 3-4h;
Step b solid-liquid separating method is plate-and-frame filter press press filtration, and press filtration pressure is 0.6MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210255076.XA CN102757023B (en) | 2012-07-23 | 2012-07-23 | Method for recovering selenium from lead smelting soot |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210255076.XA CN102757023B (en) | 2012-07-23 | 2012-07-23 | Method for recovering selenium from lead smelting soot |
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| CN102757023A CN102757023A (en) | 2012-10-31 |
| CN102757023B true CN102757023B (en) | 2014-08-13 |
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| CN104495758A (en) * | 2014-12-07 | 2015-04-08 | 金川集团股份有限公司 | Method for extracting selenium and tellurium from pyrometallurgy smelting soot |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1070814A (en) * | 1965-07-13 | 1967-06-07 | Mansfeld Kombinat W Pieck Veb | Process for production of pure selenium |
| CN1923674A (en) * | 2006-09-29 | 2007-03-07 | 金川集团有限公司 | Method of recovering selenium |
| CN202161911U (en) * | 2011-06-16 | 2012-03-14 | 中国恩菲工程技术有限公司 | Flue gas treatment equipment |
| CN102491287A (en) * | 2011-12-11 | 2012-06-13 | 郴州市金贵银业股份有限公司 | Process for separating and recovering selenium from selenium-containing material |
| CN102583264A (en) * | 2012-02-03 | 2012-07-18 | 昆明冶金研究院 | Method for leaching selenium in acid mud by using sodium sulfite |
-
2012
- 2012-07-23 CN CN201210255076.XA patent/CN102757023B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1070814A (en) * | 1965-07-13 | 1967-06-07 | Mansfeld Kombinat W Pieck Veb | Process for production of pure selenium |
| CN1923674A (en) * | 2006-09-29 | 2007-03-07 | 金川集团有限公司 | Method of recovering selenium |
| CN202161911U (en) * | 2011-06-16 | 2012-03-14 | 中国恩菲工程技术有限公司 | Flue gas treatment equipment |
| CN102491287A (en) * | 2011-12-11 | 2012-06-13 | 郴州市金贵银业股份有限公司 | Process for separating and recovering selenium from selenium-containing material |
| CN102583264A (en) * | 2012-02-03 | 2012-07-18 | 昆明冶金研究院 | Method for leaching selenium in acid mud by using sodium sulfite |
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