CN101942570B - Slag returning method for reducing gold content of smelting slag - Google Patents
Slag returning method for reducing gold content of smelting slag Download PDFInfo
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- CN101942570B CN101942570B CN2010102648985A CN201010264898A CN101942570B CN 101942570 B CN101942570 B CN 101942570B CN 2010102648985 A CN2010102648985 A CN 2010102648985A CN 201010264898 A CN201010264898 A CN 201010264898A CN 101942570 B CN101942570 B CN 101942570B
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention belongs to the technical field of smelting slag returning in the smelting industry, and particularly discloses a slag returning method for reducing the gold content of smelting slag, which comprises the following steps of: before the smelting slag is returned and discharged out of a furnace, completely clearing kish slag floating above the smelting slag, simultaneously coating acetylene ash onto the inner wall of a heading die, scooping the returned smelting slag into the heading die, vibrating the heading die, cooling the smelting slag, discharging the smelting slag, and knocking returned alloys at the bottom part of the smelting slag off for recovery. The slag returning method of the invention has the advantages of simplicity, effectiveness and capability of reducing the gold content of the smelting slag to be less than or equal to 80g/t only by once returning; and the returned smelting slag has low gold content and stable index.
Description
Technical field
The invention belongs to the smelting slag return slag technical field in the smelting industry, be specifically related to a kind of return slag method that reduces smelting slag Gold Content.
Background technology
At present, domestic refining process through the golden smelting slag that contains that pyrometallurgical smelting produced, contains gold generally at 300～800g/t.In order further to reduce smelting slag Gold Content, improve recovery of gold and silver, all to pass through the smelting slag return slag and handle, come further to improve recovery of gold and silver.But containing gold still than higher through the smelting slag that returned, is not very desirable, and generally all greater than 150g/t, recovery of gold and silver is undesirable.
Summary of the invention
The object of the present invention is to provide a kind of return slag method that reduces smelting slag Gold Content.
For realizing above-mentioned purpose, the technical scheme that the present invention takes is following:
A kind of return slag method that reduces smelting slag Gold Content: before the smelting slag return slag takes the dish out of the pot, cast aside and float the kish slag above smelting slag only, coat the acetylene ash at pier mould inwall simultaneously; Then; The smelting slag that will return again is scooped in the pier mould, and rapping pier mould is after the cooling; Smelting slag is knocked out, and the alloy that returns that divides smelting slag slag bottom knocks out recovery.
For ease of the cooling and demolding of smelting slag, the pier mould of the preferred back taper type of pier mould, rapping pier mould after the cooling, knocks out smelting slag, knocks out recovery to the alloy that returns of slag nose part and gets final product.
When pier mould inwall was coated the acetylene ash, the thickness of control acetylene ash was at 0.1～0.2mm.
The purpose of rapping pier mould is: promote that fine gold and silver is deposited to pier mould bottom in the melting slag, reduce the Gold Content on clinker top, so the actual measurement Gold Content of rapping pier mould to smelting slag top clinker is less than or equal to 80g/t and gets final product.
During rapping pier mould, can adopt the mechanical vibrator mode, be uniformly distributed with such as the hand hammer manual work that in two minutes, is not less than 250g and beat pier mould outer wall 10～15 times with tup weight.
Preferably, the tup weight of hand hammer is preferably 250～1000g.
Refinery's silver metallurgy powder, the used crucible of return slag are the big crucible of pure graphite, and in melting silver powder, return slag process, the graphite on the crucible can constantly come off and get in the smelting slag.Kish slag can adsorb a certain amount of gold and silver, and it is high to cause slag to contain gold, reduces recovery of gold and silver.Therefore the present invention casts aside and floats the kish slag above smelting slag only before the smelting slag return slag takes the dish out of the pot, and helps reducing the Gold Content of smelting slag, improves recovery of gold and silver.Simultaneously, acetylene ash on the pier mould increases the rapping of pier mould, helps that fine gold and silver is deposited to pier mould bottom in the melting slag, reduces clinker top Gold Content.
Return slag method of the present invention is simply effective, and the smelting slag Gold Content that is returned is low, and index is stable, only need return can smelting slag Gold Content be reduced to for one time to be less than or equal to 80g/t.
Embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is done into a ground and introduce in detail, but protection scope of the present invention is not limited thereto:
Embodiment 1
A kind of return slag method that reduces smelting slag Gold Content; The smelting slag treatment capacity is 508kg: before the smelting slag return slag takes the dish out of the pot, float the kish slag above smelting slag only with dragging for the left-falling stroke of slag spoon, evenly be coated with the acetylene ash that last layer thickness is 0.18mm at back taper type pier mould inwall simultaneously; Then; The smelting slag that will return again is scooped in the back taper type pier mould, and rapping pier mould (in two minutes be uniformly distributed with beat pier mould outer wall 13 times with the hand hammer manual work of tup weight 1000g) is after the cooling; Smelting slag is knocked out, knock out recovery to the alloy that returns of smelting slag slag nose part.
Embodiment 2
A kind of return slag method that reduces smelting slag Gold Content; The smelting slag treatment capacity is 510kg: before the smelting slag return slag takes the dish out of the pot, float the kish slag above smelting slag only with dragging for the left-falling stroke of slag spoon, evenly be coated with the acetylene ash that last layer thickness is 0.13mm at back taper type pier mould inwall simultaneously; Then; The smelting slag that will return again is scooped in the back taper type pier mould, and rapping pier mould (in two minutes be uniformly distributed with beat pier mould outer wall 12 times with the hand hammer manual work of tup weight 750g) is after the cooling; Smelting slag is knocked out, knock out recovery to the alloy that returns of smelting slag slag nose part.
Embodiment 3
A kind of return slag method that reduces smelting slag Gold Content; The smelting slag treatment capacity is 506kg: before the smelting slag return slag takes the dish out of the pot, float the kish slag above smelting slag only with dragging for the left-falling stroke of slag spoon, evenly be coated with the acetylene ash that last layer thickness is 0.15mm at back taper type pier mould inwall simultaneously; Then; The smelting slag that will return again is scooped in the back taper type pier mould, and rapping pier mould (in two minutes be uniformly distributed with beat pier mould outer wall 10 times with the hand hammer manual work of tup weight 500g) is after the cooling; Smelting slag is knocked out, knock out recovery to the alloy that returns of smelting slag slag nose part.
Embodiment 4
A kind of return slag method that reduces smelting slag Gold Content; The smelting slag treatment capacity is 503kg: before the smelting slag return slag takes the dish out of the pot, float the kish slag above smelting slag only with dragging for the left-falling stroke of slag spoon, evenly be coated with the acetylene ash that last layer thickness is 0.15mm at back taper type pier mould inwall simultaneously; Then; The smelting slag that will return again is scooped in the back taper type pier mould, and rapping pier mould (in two minutes be uniformly distributed with beat pier mould outer wall 13 times with the hand hammer manual work of tup weight 750g) is after the cooling; Smelting slag is knocked out, knock out recovery to the alloy that returns of smelting slag slag nose part.
Embodiment 5
A kind of return slag method that reduces smelting slag Gold Content; The smelting slag treatment capacity is 512kg: before the smelting slag return slag takes the dish out of the pot, float the kish slag above smelting slag only with dragging for the left-falling stroke of slag spoon, evenly be coated with the acetylene ash that last layer thickness is 0.1mm at back taper type pier mould inwall simultaneously; Then; The smelting slag that will return again is scooped in the back taper type pier mould, and rapping pier mould (in two minutes be uniformly distributed with beat pier mould outer wall 10 times with the hand hammer manual work of tup weight 250g) is after the cooling; Smelting slag is knocked out, knock out recovery to the alloy that returns of smelting slag slag nose part.
Embodiment 6
A kind of return slag method that reduces smelting slag Gold Content; The smelting slag treatment capacity is 505kg: before the smelting slag return slag takes the dish out of the pot, float the kish slag above smelting slag only with dragging for the left-falling stroke of slag spoon, evenly be coated with the acetylene ash that last layer thickness is 0.2mm at back taper type pier mould inwall simultaneously; Then; The smelting slag that will return again is scooped in the back taper type pier mould, and rapping pier mould (in two minutes be uniformly distributed with beat pier mould outer wall 15 times with the hand hammer manual work of tup weight 1000g) is after the cooling; Smelting slag is knocked out, knock out recovery to the alloy that returns of smelting slag slag nose part.
Embodiment 7
A kind of return slag method that reduces smelting slag Gold Content; The smelting slag treatment capacity is 504kg: before the smelting slag return slag takes the dish out of the pot, float the kish slag above smelting slag only with dragging for the left-falling stroke of slag spoon, evenly be coated with the acetylene ash that last layer thickness is 0.12mm at back taper type pier mould inwall simultaneously; Then; The smelting slag that will return again is scooped in the back taper type pier mould, and rapping pier mould (in two minutes be uniformly distributed with beat pier mould outer wall 10 times with the hand hammer manual work of tup weight 750g) is after the cooling; Smelting slag is knocked out, knock out recovery to the alloy that returns of smelting slag slag nose part.
The result of laboratory test such as the following table of 1～7 return slag of the foregoing description:
Through test, this technological invention, institute's return slag Gold Content is low, and index is stable, only need return one time and can slag Gold Content be reduced to≤80g/t, far below slag Gold Content before the experiment.
Claims (5)
1. a return slag method that reduces smelting slag Gold Content is characterized in that: before the smelting slag return slag takes the dish out of the pot, cast aside and float the kish slag above smelting slag only; Coat the acetylene ash of thickness at 0.1～0.2mm at pier mould inwall simultaneously, then, the smelting slag that will return again is scooped in the pier mould; Rapping pier mould; After the cooling, smelting slag is knocked out, the alloy that returns that divides smelting slag slag bottom knocks out recovery.
2. the return slag method of reduction smelting slag Gold Content as claimed in claim 1 is characterized in that: the pier mould is the back taper type.
3. according to claim 1 or claim 2 the return slag method of reduction smelting slag Gold Content is characterized in that: the actual measurement Gold Content≤80g/t of rapping pier mould to smelting slag top clinker.
4. the return slag method of reduction smelting slag Gold Content as claimed in claim 3 is characterized in that: during rapping pier mould, the hand hammer manual work that is not less than 250g with tup weight in two minutes is uniformly distributed with beats pier mould outer wall 10～15 times.
5. the return slag method of reduction smelting slag Gold Content as claimed in claim 4 is characterized in that: the tup weight of hand hammer is 250～1000g.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102648985A CN101942570B (en) | 2010-08-27 | 2010-08-27 | Slag returning method for reducing gold content of smelting slag |
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| CN2010102648985A CN101942570B (en) | 2010-08-27 | 2010-08-27 | Slag returning method for reducing gold content of smelting slag |
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| CN101942570A CN101942570A (en) | 2011-01-12 |
| CN101942570B true CN101942570B (en) | 2012-07-04 |
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| CN116793101B (en) * | 2023-08-21 | 2023-10-27 | 四川华洁嘉业环保科技有限责任公司 | Be applied to rotary kiln's scale removal mechanism and automatic control scale removal's rotary kiln |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062927A (en) * | 1990-12-31 | 1992-07-22 | 沈阳冶炼厂 | A kind of method that improves lead bullion Gold Content |
| CN1268580A (en) * | 2000-01-11 | 2000-10-04 | 韩英东 | Noble metal smelting slag wet metallurgical process |
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2010
- 2010-08-27 CN CN2010102648985A patent/CN101942570B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062927A (en) * | 1990-12-31 | 1992-07-22 | 沈阳冶炼厂 | A kind of method that improves lead bullion Gold Content |
| CN1268580A (en) * | 2000-01-11 | 2000-10-04 | 韩英东 | Noble metal smelting slag wet metallurgical process |
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