CN104232906A - Method for recycling silver from silver-containing material via lead chloride slag - Google Patents
Method for recycling silver from silver-containing material via lead chloride slag Download PDFInfo
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- CN104232906A CN104232906A CN201410549311.3A CN201410549311A CN104232906A CN 104232906 A CN104232906 A CN 104232906A CN 201410549311 A CN201410549311 A CN 201410549311A CN 104232906 A CN104232906 A CN 104232906A
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- silver
- slag
- argentiferous
- lead skim
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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
- 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
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Abstract
The invention discloses a method for recycling silver from silver-containing material via lead chloride slag, the method can effectively recycle the silver from silver-containing material, which is difficultly processed by one-step melting process, and the method comprises the steps as follows: evenly mixing the silver-containing material with the lead chloride slag, slagging constituent and reducing agent and adding the mixture into the furnace, wherein the melting temperature is 700-850 degrees centigrade, the reaction time is 7-8h, the setting time is 1.5-2h, discharging the dross on the surface, cooling to 550-650 degrees centigrade and discharging the lead. The method is simple and convenience in operation, short in recycling period, low in production cost, friendly in environment and high in silver recycling rate.
Description
Technical field
The present invention relates to a kind of method of precious metal pyrometallurgical smelting, especially relate to a kind of method utilizing chlorination lead skim to reclaim silver in argentiferous material.
Background technology
Chlorination lead skim is the lead-containing material of bismuth refining process output, mainly contains the valuable metals such as plumbous, silver-colored.Chlorination lead skim is the block slag of a kind of green scentless crystal, leaded 60 ~ 70%, when chlorination lead skim is heated to more than 950 DEG C, distil as gaseous state volatilization, chlorination lead skim water soluble.Argentiferous material is the product in silver-colored smelting process, and general silver content is 0.5% ~ 15%, has very high recycling and is worth.
The object of the present invention is achieved like this: a kind of method utilizing chlorination lead skim to reclaim silver in argentiferous material, by chlorination lead skim and slag former, reductive agent melting output simple substance lead, simultaneously slag former has good solidification effect output calcium chloride slag to the chlorine in chlorination lead skim and avoids the volatilization of chlorine to cause environmental pollution, simple substance lead is the good trapping agent of the metals such as silver, bismuth, and the valuable metals such as silver-colored bismuth are formed precious metals containing lead by lead trapping and reclaim; In fusion process, lead chloride slag melting point is low, and simultaneously to have fusing point low for the calcium chloride slag of output, the feature of good fluidity, accelerate material melting, output flue gas is after surface cool tower cooler is gathered dust by pulse bag type dust collector, and it is emptying through chimney to enter absorption tower degree of depth dechlorination, melting in flue dust Returning process; Main generation is reacted as follows:
PbCl
2+CaO+C＝Pb+CaCl
2+CO
PbCl
2+CaO+CO＝Pb+CaCl
2+CO
2
Pb+Ag+Au＝Pb(Ag+Au)
Summary of the invention
Technical problem to be solved by this invention is the deficiency overcoming the existence of existing technique, a kind of method utilizing chlorination lead skim to reclaim silver in argentiferous material is proposed, the method is intended to be utilized by direct smelting the valuable metals such as silver in the lead trapping argentiferous material in chlorination lead skim and bismuth, thus the valuable metals such as recover silver, have that production cost is low, return period is short, rate of recovery advantages of higher.
Technical scheme of the present invention is: by chlorination lead skim and slag former, reductive agent melting output simple substance lead, simultaneously slag former has good solidification effect output calcium chloride slag to the chlorine in chlorination lead skim and avoids the volatilization of chlorine to cause environmental pollution, simple substance lead is the good trapping agent of the metals such as silver, bismuth, and the metals such as silver-colored bismuth are formed precious metals containing lead by lead trapping and reclaim.
Its concrete technology carries out according to following steps:
A kind of method utilizing chlorination lead skim to reclaim silver in argentiferous material, the present invention is characterised in that: by chlorination lead skim, argentiferous material, slag former, reductive agent by dropping in stove after 1:0.4 ~ 1:0.01 ~ 0.1:0.01 ~ 0.1 ratio uniform mixing, controlling smelting temperature is 500 ~ 950 DEG C, reaction times is 6 ~ 10h, carry out retailoring, react complete after through precipitating 1 ~ 3h, release surface scum, when in-furnace temperature is cooled to 550 ~ 650 DEG C, release precious metals containing lead; The precious metals containing lead of output is through precious metal smelting system recoveries wherein valuable metal; Flue gas gathers dust through surface cool tower cooler pulse bag type dust collector, up to standard emptying through the emptying tail gas of chimney after the degree of depth dechlorination of absorption tower, the melting of flue dust Returning process.
Argentiferous material of the present invention is the valuable metal slag materials such as the argentiferous of output in silver, bismuth, plumbous smelting process, comprise the materials such as silver-zine slag, desilver slag, decopper(ing) slag, point silver-colored flue dust, wherein argentiferous is 0.5% ~ 15%, is the mixture of one or more in argentiferous material during batching.
Slag former of the present invention can be the mixture of one or more in calcium carbonate, unslaked lime, calcium hydroxide; Reductive agent can be the mixture of one or more in nut coke powder, hard coal, carbon dust.
Ratio preferred 1:0.5 ~ 0.75:0.02 ~ 0.05:0.02 ~ 0.05 of chlorination lead skim of the present invention, argentiferous material, slag former, reductive agent.
Smelting temperature of the present invention is preferably 700 ~ 850 DEG C; Reaction times is preferably 7 ~ 8h; Sedimentation time is preferably 1.5 ~ 2h.
Therefore compared with prior art, the present invention has following positively effect:
1, the present invention is by direct smelting, and utilizing the lead in chlorination lead skim to trap silver-colored bismuth etc. has valuable metal, and by reluctant argentiferous material melting output precious metals containing lead, easy and simple to handle, Production Flow Chart is short, and treatment capacity is large, and production cost is low, and silver raising recovery rate is up to more than 99%.
2, in fusion process, utilize the characteristic of the low and good fluidity of the calcium chloride slag melting point of chlorination lead skim, output to accelerate material melting, in production process, smelting temperature is low thus reach the object of energy-conserving and environment-protective.
3, in this programme implementation process, the solid chlorine because generating calcium chloride slag, avoid the environmental pollution caused because of removing of chlorine, output flue gas is after surface cool tower cooler is gathered dust by pulse bag type dust collector simultaneously, emptying through chimney after entering absorption tower degree of depth dechlorination, flue dust returns Production Flow Chart melting, therefore, without toxic and harmful, waste water, waste sludge discharge in whole production process, can not to environment.
Below by embodiment, technical scheme of the present invention is described, it should be noted that, the condition do not enumerated in following method and equipment, be condition as known in the art and equipment, and embodiment described below does not limit the present invention in any way.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Now in conjunction with Figure of description and embodiment, present invention process is described further:
Embodiment 1:
3t chlorination lead skim, 1.6t silver-zine slag, 138kg slag former, 95kg reductive agent are mixed in rear input stove, controlling smelting temperature is 700 ~ 750 DEG C, reaction 7.5h, after precipitation 1.5h, release surface scum, when in-furnace temperature is cooled to about 600 DEG C, release precious metals containing lead; Reducing slag returns lead system and reclaims plumbous, and flue gas gathers dust through surface cool tower cooler afterpulse sack cleaner, and by emptying through chimney after the degree of depth dechlorination of absorption tower, tail gas is up to standard emptying, and flue dust returns Production Flow Chart melting; The rate of recovery of silver is 99.4%.
Embodiment 2:
3t chlorination lead skim, 1.8t decopper(ing) slag, 168Kg slag former, 144Kg reductive agent are mixed in rear input stove, controlling smelting temperature is 750 ~ 800 DEG C, reaction 8h, after precipitation 2h, release surface scum, when in-furnace temperature is cooled to about 620 DEG C, release precious metals containing lead; Reducing slag returns lead system and reclaims plumbous, and flue gas gathers dust through surface cool tower cooler afterpulse sack cleaner, and by emptying through chimney after the degree of depth dechlorination of absorption tower, tail gas is up to standard emptying, and flue dust returns Production Flow Chart melting; The rate of recovery of silver is 99.2%.
Embodiment 3:
3t chlorination lead skim, 1.5t desilver slag, 225Kg slag former, 180Kg reductive agent are mixed in rear input stove, controlling smelting temperature is 720 ~ 780 DEG C, reaction 8h, after precipitation 2h, release surface scum, when in-furnace temperature is cooled to about 650 DEG C, release precious metals containing lead; Reducing slag returns lead system and reclaims plumbous, and flue gas gathers dust through surface cool tower cooler afterpulse sack cleaner, and by emptying through chimney after the degree of depth dechlorination of absorption tower, tail gas is up to standard emptying, and flue dust returns Production Flow Chart melting; The rate of recovery of silver is 99.05%.
Claims (5)
1. the method utilizing chlorination lead skim to reclaim silver in argentiferous material, it is characterized in that: by chlorination lead skim, argentiferous material, slag former, reductive agent by dropping in stove after 1:0.4 ~ 1:0.01 ~ 0.1:0.01 ~ 0.1 ratio uniform mixing, controlling smelting temperature is 500 ~ 950 DEG C, reaction times is 6 ~ 10h, carry out retailoring, react complete after through precipitating 1 ~ 3h, release surface scum, when in-furnace temperature is cooled to 550 ~ 650 DEG C, release precious metals containing lead; The precious metals containing lead of output is through precious metal smelting system recoveries wherein valuable metal; Flue gas gathers dust through surface cool tower cooler pulse bag type dust collector, up to standard emptying through the emptying tail gas of chimney after the degree of depth dechlorination of absorption tower, the melting of flue dust Returning process.
2. a kind of method utilizing chlorination lead skim to reclaim silver in argentiferous material according to claims 1, it is characterized in that: argentiferous material is the valuable metal slag materials such as the argentiferous of output in silver, bismuth, plumbous smelting process, comprise the materials such as silver-zine slag, desilver slag, decopper(ing) slag, point silver-colored flue dust, wherein argentiferous is 0.5% ~ 15%, is the mixture of one or more in argentiferous material during batching.
3. a kind of method utilizing chlorination lead skim to reclaim silver in argentiferous material according to claims 1, is characterized in that: slag former is the mixture of one or more in calcium carbonate, unslaked lime, calcium hydroxide; Reductive agent is the mixture of one or more in nut coke powder, hard coal, carbon dust.
4. a kind of method utilizing chlorination lead skim to reclaim silver in argentiferous material according to claims 1, is characterized in that: ratio preferred 1:0.5 ~ 0.75:0.02 ~ 0.05:0.02 ~ 0.05 of chlorination lead skim, argentiferous material, slag former, reductive agent.
5. a kind of method utilizing chlorination lead skim to reclaim silver in argentiferous material according to claims 1, is characterized in that: smelting temperature is preferably 700 ~ 850 DEG C; Reaction times is preferably 7 ~ 8h; Sedimentation time is preferably 1.5 ~ 2h.
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| CN201410549311.3A CN104232906B (en) | 2014-10-16 | 2014-10-16 | Method for recycling silver from silver-containing material via lead chloride slag |
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| CN201410549311.3A CN104232906B (en) | 2014-10-16 | 2014-10-16 | Method for recycling silver from silver-containing material via lead chloride slag |
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| CN104232906B CN104232906B (en) | 2017-01-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419109A (en) * | 2017-08-05 | 2017-12-01 | 重庆科技学院 | A kind of method that metallic lead is reclaimed from lead chloride |
| CN107794374A (en) * | 2017-12-14 | 2018-03-13 | 山东金创金银冶炼有限公司 | A kind of method that wet method carries silver in mud from silver cyanide |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497944A (en) * | 2009-03-13 | 2009-08-05 | 四川宏达股份有限公司 | Process for recycling lead and silver by lead silver slag pyrogenic process |
| CN101613806A (en) * | 2009-08-03 | 2009-12-30 | 沈阳有色金属研究院 | The method that lead bullion is produced in the direct low smelting heat of a kind of solid lead chloride |
| CN101818259A (en) * | 2010-05-14 | 2010-09-01 | 唐松云 | Technology for refining lead from lead chloride slag by means of pyrometallurgy |
| CN102080158A (en) * | 2010-12-30 | 2011-06-01 | 郴州市金贵银业股份有限公司 | Pyrogenic attack comprehensive recovery process for lead and silver slag leached from bismuth oxide slag |
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2014
- 2014-10-16 CN CN201410549311.3A patent/CN104232906B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497944A (en) * | 2009-03-13 | 2009-08-05 | 四川宏达股份有限公司 | Process for recycling lead and silver by lead silver slag pyrogenic process |
| CN101613806A (en) * | 2009-08-03 | 2009-12-30 | 沈阳有色金属研究院 | The method that lead bullion is produced in the direct low smelting heat of a kind of solid lead chloride |
| CN101818259A (en) * | 2010-05-14 | 2010-09-01 | 唐松云 | Technology for refining lead from lead chloride slag by means of pyrometallurgy |
| CN102080158A (en) * | 2010-12-30 | 2011-06-01 | 郴州市金贵银业股份有限公司 | Pyrogenic attack comprehensive recovery process for lead and silver slag leached from bismuth oxide slag |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419109A (en) * | 2017-08-05 | 2017-12-01 | 重庆科技学院 | A kind of method that metallic lead is reclaimed from lead chloride |
| CN107794374A (en) * | 2017-12-14 | 2018-03-13 | 山东金创金银冶炼有限公司 | A kind of method that wet method carries silver in mud from silver cyanide |
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| CN104232906B (en) | 2017-01-18 |
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