CN102492854B - Method for raising leaching rate of silver cyanide - Google Patents
Method for raising leaching rate of silver cyanide Download PDFInfo
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- CN102492854B CN102492854B CN2011104463136A CN201110446313A CN102492854B CN 102492854 B CN102492854 B CN 102492854B CN 2011104463136 A CN2011104463136 A CN 2011104463136A CN 201110446313 A CN201110446313 A CN 201110446313A CN 102492854 B CN102492854 B CN 102492854B
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- leaching
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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
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Abstract
The invention relates to a method for raising leaching rate of silver cyanide and belongs to the technical field of roasting-cyaniding silver extraction production processing technology in the gold smelting and chemical industry. The method provided by the invention contains the following steps of: 1, adding complex silver ore, sal glauberi and sodium carbonate according to the mass ratio of 1: (0.02-0.03): (0.02-0.03) into a surge tank, adjusting the pulp concentration to 65-70% by the addition of water, and continuously stirring at normal temperature and normal pressure for 3-5 hours; 2) carrying out fluidized sulfating roasting on the pulp obtained from the step 1); 3) carrying out acid leaching treatment; and 4) carrying out cyanide leaching. By the adoption of the method, recovery rate of silver can be effectively raised, and utilization rate of resources and enterprise economic benefits are raised.
Description
Technical field
The present invention relates to a kind of method for improving the silver cyanide leaching yield, belong to production department's science and engineering technology field of baking cyaniding desilver in gold smelting and chemical industry.
Background technology
At present, in the silver ore smelting process, when cupric, arsenic, the difficult Complicated silver mine of carbon adopt baking cyaniding method extraction silver, copper, the general silver-colored cyaniding rate of recovery is lower than 65%, present treatment process is: cyanidation tailings is as producing iron oxide red, making cement additire etc., silver wherein is not recycled, and has wasted valuable resource.
Summary of the invention
The object of the invention is to solve the weak point that above-mentioned prior art exists, provide a kind of and can effectively improve silver raising recovery rate, improve the method that is used for improving the silver cyanide leaching yield of resource utilization and Business Economic Benefit.
The present invention is achieved through the following technical solutions:
A kind of method for improving the silver cyanide leaching yield, its special character is to comprise the following steps:
1, Complicated silver mine, sodium sulfate, sodium carbonate are 1:(0.02-0.03 in mass ratio): (0.02-0.03) add in surge tank, adding water adjustment pulp density is 65%-70%, normal temperature and pressure, continuously stirring 3-5 hour;
The main valuable element of described Complicated silver mine is silver, gold, copper, lead, sulphur, arsenic, carbon, and content is silver-colored 0.096-0.12g/t, golden 0.0011-0.0022%, copper 0.18-0.22%, plumbous 0.40-0.60%, sulphur 18-22%, arsenic 4-6%, carbon 1.8-2.2%;
The concentration of described sodium sulfate is 2%-3%;
The concentration of described sodium carbonate is 2%-3%;
2, the ore slurry pump of step 1 gained is delivered to slurry storage tank, enter fluidizing furnace by spray gun and carry out fluidized bed roasting, add pressurized air by roots blower in process, control 550-600 ℃ of temperature and carry out roasting, roasting time is controlled at 10-30 second;
3, the dilute sulphuric acid that is 3%-10% with the employing of the calcining after step 2 roasting concentration carries out acidleach, and it is the 25-30% that solid content accounts for total amount that the adjustment pulp density reaches 25-30%(), carry out 3-5 hour acidic leaching and process;
4, the acid leaching ore pulp after step 3 acidleach processing is delivered to the thickener concentration and settlement through hose pump, underflow pumps into the adhesive tape filter washing and filtering, filter cake adds water and sizes mixing, transferring to concentration is that 25-30%(is the 25-30% that solid content accounts for total amount), pH value with soda ash adjustment ore pulp is 10-11 again, then add the sodium cyanide solution that concentration is 25-35%, the add-on of sodium cyanide solution is the 0.15%-0.20% of ore pulp amount, carries out 60 hours Cyanide Leachings.
A kind of method for improving the silver chloride leaching yield of the present invention owing to adding sodium sulfate, sodium carbonate in roasting process, therefore can make the rate of recovery of silver reach 89.06-90.49%, has improved the utilization ratio of resource and the economic benefit of enterprise.
Embodiment
Below provide the specific embodiment of the present invention, be used for that the present invention is described further.
Embodiment 1
A kind of method for improving the silver chloride leaching yield of the present embodiment comprises the following steps:
1, be that 11 g/t, silver content are that Complicated silver mine, the concentration of 960 g/t is that 2% sodium sulfate, concentration are that 2% sodium carbonate adds in surge tank for 1:0.02:0.02 in mass ratio with Gold Content, Complicated silver mine is powdery, add water and adjust pulp density 65%, normal temperature and pressure, continuously stirring 3 hours;
2, carry out fluidized bed roasting, be specially: the ore slurry pump of step 1 gained is delivered to slurry storage tank, enter fluidizing furnace by spray gun and carry out fluidized bed roasting, add pressurized air by roots blower in process, control 550-600 ℃ of temperature and carry out roasting, roasting time is controlled at 10-30 second;
3, the calcining after roasting is delivered to pickling tank by scraper plate and carries out acidleach and process, and adopting concentration is that the dilute sulphuric acid of 3%-10% carries out acidleach, and adjusting pulp density, to reach 25-30%(be the 25-30% that solid content accounts for total amount), carry out 3-5 hour acidic leaching and process.
4, acid leaching ore pulp is delivered to the thickener concentration and settlement through hose pump, underflow pumps into the adhesive tape filter washing and filtering, filter cake adds water and sizes mixing, transferring to concentration is that 25-30%(is the 25-30% that solid content accounts for total amount), pH value with soda ash adjustment ore pulp is 10-11 again, then add the sodium cyanide solution that concentration is 25-35%, the add-on of sodium cyanide solution is the 0.15%-0.20% of ore pulp amount, carries out 60 hours Cyanide Leachings.
The result of laboratory test of the present embodiment and related data, as shown in table 1
The result of laboratory test of table 1: embodiment 1 and related data
Embodiment 2
The difference of the present embodiment and embodiment 1 is step 1, is specially:
Be that 12 g/t, silver content are that Complicated silver mine, the concentration of 1100 g/t is that 2.5% sodium sulfate, concentration are that 2.5% sodium carbonate adds in surge tank for 1:0.02:0.03 in mass ratio with Gold Content, Complicated silver mine is powdery, add water and adjust pulp density 68%, normal temperature and pressure, continuously stirring 4 hours;
The result of laboratory test of the present embodiment and related data, as shown in table 2
The result of laboratory test of table 2: embodiment 2 and related data
Embodiment 3
The difference of the present embodiment and embodiment 1 is step 1, is specially:
Be that 13.5g/t, silver content are that Complicated silver mine, the concentration of 1326 g/t is that 2% sodium sulfate, concentration are that 2% sodium carbonate adds in surge tank for 1:0.03:0.02 in mass ratio with Gold Content, Complicated silver mine is powdery, add water and adjust pulp density 70%, normal temperature and pressure, continuously stirring 5 hours;
The result of laboratory test of the present embodiment and related data, as shown in table 2
The result of laboratory test of table 3: embodiment 3 and related data
A kind of method for improving the silver chloride leaching yield of the present invention owing to adding sodium sulfate, sodium carbonate in roasting process, therefore can make the rate of recovery of silver reach 89.06-90.49%, has improved the utilization ratio of resource and the economic benefit of enterprise.
Claims (2)
1. method that be used for to improve the silver cyanide leaching yield is characterized in that comprising the following steps:
1), Complicated silver mine, sodium sulfate, sodium carbonate are 1:(0.02-0.03 in mass ratio): (0.02-0.03) add in surge tank, adding water adjustment pulp density is 65%-70%, normal temperature and pressure, continuously stirring 3-5 hour;
2), the ore pulp of step 1) gained is seethed with excitement sulfurization roasting;
3), acidleach is processed;
4), Cyanide Leaching;
The concentration of described sodium sulfate is 2%-3%;
The concentration of described sodium carbonate is 2%-3%;
Described step 2) concrete steps of fluidized bed roasting are:
The ore slurry pump of step 1) gained is delivered to slurry storage tank, enter fluidizing furnace by spray gun and carry out fluidized bed roasting, add pressurized air by roots blower in process, control 550-600 ℃ of temperature and carry out roasting, roasting time is controlled at 10-30 second;
The concrete steps that described step 3) acidleach is processed are:
Through step 2) to adopt concentration be that the dilute sulphuric acid of 3%-10% carries out acidleach for calcining after roasting, adjusts pulp density and reach 25-30%, carry out 3-5 hour acidic leaching and process;
The concrete steps of described step 4) Cyanide Leaching are:
Acid leaching ore pulp after the step 3) acidleach is processed is delivered to the thickener concentration and settlement through hose pump, underflow pumps into the adhesive tape filter washing and filtering, filter cake adds water and sizes mixing, transferring to concentration is 25-30%, pH value with soda ash adjustment ore pulp is 10-11 again, then add the sodium cyanide solution that concentration is 25-35%, the add-on of sodium cyanide solution is the 0.15%-0.20% of ore pulp amount, carries out 60 hours Cyanide Leachings.
2. according to a kind of method for improving the silver cyanide leaching yield claimed in claim 1, it is characterized in that the main valuable element of described Complicated silver mine is silver, gold, copper, lead, sulphur, arsenic, carbon, content is silver-colored 960g/t or 1100g/t or 1326 g/t, gold 0.0011-0.0022%, copper 0.18-0.22%, plumbous 0.40-0.60%, sulphur 18-22%, arsenic 4-6%, carbon 1.8-2.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104463136A CN102492854B (en) | 2011-12-28 | 2011-12-28 | Method for raising leaching rate of silver cyanide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104463136A CN102492854B (en) | 2011-12-28 | 2011-12-28 | Method for raising leaching rate of silver cyanide |
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| Publication Number | Publication Date |
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| CN102492854A CN102492854A (en) | 2012-06-13 |
| CN102492854B true CN102492854B (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104463136A Expired - Fee Related CN102492854B (en) | 2011-12-28 | 2011-12-28 | Method for raising leaching rate of silver cyanide |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4721526A (en) * | 1986-08-13 | 1988-01-26 | Kamyr, Inc. | Heap leaching with oxygen |
| CN1169976C (en) * | 2001-08-02 | 2004-10-06 | 山东师范大学 | Method for raising recovery rate of silver from ore containing sulfur, copper, lead, gold and silver |
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