CN102560137B - Refining process of alloyed gold - Google Patents
Refining process of alloyed gold Download PDFInfo
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- CN102560137B CN102560137B CN2011104471880A CN201110447188A CN102560137B CN 102560137 B CN102560137 B CN 102560137B CN 2011104471880 A CN2011104471880 A CN 2011104471880A CN 201110447188 A CN201110447188 A CN 201110447188A CN 102560137 B CN102560137 B CN 102560137B
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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 hydrometallurgy, and particularly relates to a refining process of alloyed gold. The refining process comprises the steps of: pulverizing alloyed gold, uniformly mixing with sodium chlorate, adding hydrochloric acid solution to the mixture for leaching to obtain leachate and leached residue, and reducing the leachate to obtain finished product gold powder. By adopting the alloyed gold refining method provided by the invention, high-purity finished product gold can be produced quickly and efficiently; and the refining method is simple in process, safe, pollution-free, short in refining period and high in efficiency.
Description
Technical field
The invention belongs to technical field of wet metallurgy, particularly a kind of refinery practice of gold containing material.
Background technology
Present domestic gold and silver refinery practice mainly contains electrorefining, extracting refining and the external Boliden refinery practice of introducing.Electrorefining contains gold more than 90% to ingredient requirement, and the production cycle is long, and electrolytic solution and the overstocked a large amount of gold of anode anode scrap, and the direct yield of gold is low, lets funds lie idle.Extracting refining, refining cycle are long partially, and the technology floor space is bigger than normal, can cause organic contamination to environment.The at present domestic large-scale gold and silver refining enterprise Boliden refinery practices of using external introduction more, this technical process is short, advanced technology, adaptability is strong, but shortcoming is to need a large amount of chlorine as the leaching agent of gold, chlorine danger is bigger, needs the emphasis safety precaution.The extraction time of this refinery practice gold is that every 300kg powdered gold needs 12-14 hour simultaneously, and the cycle is longer, and leaching yield is about 90%.
Summary of the invention
The object of the present invention is to provide a kind of refinery practice of gold containing material, can overcome present technology or long flow path or have and pollute or the low defective of security.
The technical solution used in the present invention is as follows:
A kind of refinery practice of gold containing material mixes with the gold containing material efflorescence and with sodium chlorate, and mixture adds hydrochloric acid soln and leaches, and obtains leach liquor and leached mud, obtains the finished product bronze after the leach liquor reduction.
The granularity of gold containing material efflorescence is the 150-250 order.
The gold containing material powder that the gold containing material efflorescence obtains and the mass mixing ratio example of sodium chlorate are 2-3.5:1.
The concentration of hydrochloric acid soln is 180-230g/L, and the temperature of hydrochloric acid soln is 65-80 ℃.
Mixture joins in the hydrochloric acid soln by certain speed, and adding speed is that every 1000L hydrochloric acid soln adds by 3-5kg/min.
Sodium Metabisulfite is adopted in reduction, and leach liquor once gold reduction take-off potential be that the terminal point current potential be+650mv that the golden terminal point current potential that reduces of secondary is+350mv between+760 to+780mv.
Leached mud founding behind iron replacement becomes positive plate to carry out silver-colored electrolysis, obtains purity and reaches 99.99% electrolytic silver.
Gold containing material of the present invention be grade the thick gold between the 30-99.9%, grade at the industrial gold between the 30-99.9% or grade the jewellery gold between 30-99.9%.
At present more the sodium chlorate technology for gold extraction is used for goldmud from cyanide processing, contains taste gold-bearing material (containing gold generally below 30%) on the low side such as gold anode mud, and having more obstacle in the higher thick gold of taste, industry gold, the golden application of jewellery: the proportion as gold is bigger, the gold containing material that purity is high lumps when leaching with sodium chlorate easily, the whirlpool material, the leaching yield of gold is lower, generally below 70%.
The present invention is at first with the gold containing material efflorescence, powdered gold adopts the mode that the back constant speed quantitative adds of evenly mixing in proportion earlier with the feed way of sodium chlorate then, the proportioning ratio of granularity, powdered gold and sodium chlorate by the control powdered gold and concentration of hydrochloric acid, temperature of reaction finally realize the application of sodium chlorate technology for gold extraction in the higher-grade gold containing material, obtained simultaneously to be higher than 95% gold leaching rate, extraction time is 1.5-2 hour, with respect to shortening greatly in 12-14 hour of existing Boliden refinery practice.
Wherein powdered gold adopts the mode that the back constant speed quantitative adds of evenly mixing in proportion earlier with sodium chlorate, has guaranteed that the powdered gold sodium chlorate adds synchronously, effectively prevents the powdered gold caking, improves the leaching yield of gold and the utilization ratio of sodium chlorate.Will inevitably cause powdered gold caking, whirlpool to expect and the reduction leaching yield if add sodium chlorate again after employing powdered gold and sodium chlorate are separated adding or added powdered gold earlier.Powdered gold and sodium chlorate should be as requested the ratio mixing, if sodium chlorate is on the low side, gold can not leach fully, if sodium chlorate is too much, leaching cost increases, and has a small amount of chlorine reactor of emerging in the process.If powdered gold mixes the adding excessive velocities of inhomogeneous or mixture with sodium chlorate, have not only in the leaching process that chlorine is emerged but also the leaching yield of gold can reduce.The granularity of powdered gold is crossed the leaching yield reduction that conference makes gold, has bronze dirt in the meticulous batch mixing process of powdered gold granularity, and reaction is violent, and temperature rises too fast.The concentration of hydrochloric acid cross low or hydrochloric acid content on the low side, sodium chlorate can not complete reaction, the leaching yield of influence gold.Concentration of hydrochloric acid is too high or hydrochloric acid content is too much, and leaching cost increases, and take-off potential influences the reduction of chlorine immersion liquid with on the low side before the reduction of chlorine immersion liquid.If the starting temperature of reaction is low excessively, the speed of response that sodium chlorate is soaked gold is very slow, and solution temperature will reduce fast; If temperature of reaction is too high, can cause the consumption of hydrochloric acid and sodium chlorate to increase, reduce the leaching yield of gold.
The invention discloses a kind of with a kind of method of refining of sodium chlorate as a gold of leaching agent output GB of gold containing material.A bronze purity that obtains reaches 99.99%, and leached mud becomes positive plate to carry out silver-colored electrolysis through founding behind the iron replacement, and output purity reaches 99.99% electrolytic silver.The present invention has used for reference the advantage of domestic multiple refinery practice and Boliden refinery practice.Adopt present method, not only to the adaptability strong (containing the directly refining of gold containing material of golden 30-99.9%) of raw material, and process safety is reliable, flow process is short, and kumquat is pressed few, and cost is low, with short production cycle, can finish the refining of gold containing material within a short period of time, the qualified ingot of output; Be a kind of safe, gold containing material method of refining efficiently, be easy to apply.
The present invention has following advantage with respect to prior art:
Adopt gold containing material method of refining of the present invention, the highly purified finished product gold of output quickly and efficiently, technology is simple, safe, pollution-free, and refining cycle is short, the efficient height.
Description of drawings
Fig. 1 is the schema of gold containing material refinery practice of the present invention.
Embodiment
Below with specific embodiment technical scheme of the present invention is described, but protection scope of the present invention is not limited thereto:
Embodiment 1
The refining of gold containing material (containing gold 95.6%), concrete steps are as follows:
It is 200 purpose powdered golds that gold containing material 300kg efflorescence is become granularity, adding the 100kg sodium chlorate in the powdered gold evenly mixes, adding hydrochloric acid and water amount to 1000L in the reactor, make content of hydrochloric acid reach 200g/L, open to stir and be warmed up to more than 65 ℃, with the mixture of feeding device with powdered gold and sodium chlorate, speed by 4kg/min evenly joins in the reactor, the reaction process heat release keeps temperature of reaction at 65-80 ℃, behind reinforced the finishing, drive unnecessary chlorine out of more than the rising temperature to 85 ℃, continue to stir 10 minutes, gold leaches and finishes, and blowing filters.Filtrate pumps in the finished product gold reduction kettle with Sodium Metabisulfite and restores bronze 261.5kg and secondary gold 10.9kg, and a qualified bronze melting is cast into standard ingot (purity〉99.99%).Become silver powder with iron replacement in the leaching filter residue adding silver powder displacement still, the silver powder founding becomes the silver anode plate through the qualified electrolytic silver of silver-colored electrolysis output, and secondary gold and silver electrolysis anode slime return sodium chlorate and soak the metal working order, reclaim gold.
Following table 1 has provided embodiment 2,3 and the partial parameters of Comparative Examples 1-3, does not relate to part with embodiment 1.
Table 1
Above-described embodiment is the preferred embodiment of the present invention, but embodiments of the present invention are not restricted to the described embodiments, and the change that other any the present invention of not deviating from does all should be the substitute mode of equivalence, is included within protection scope of the present invention.
Claims (5)
1. the refinery practice of a gold containing material is characterized in that, mixes with the gold containing material efflorescence and with sodium chlorate, and mixture adds hydrochloric acid soln and leaches, and obtains leach liquor and leached mud, obtains the finished product bronze after the leach liquor reduction; The granularity of gold containing material efflorescence is the 150-250 order, the gold containing material powder that the gold containing material efflorescence obtains and the mass mixing ratio example of sodium chlorate are 2-3.5:1, mixture joins in the hydrochloric acid soln by certain speed, the adding speed of mixture is to add by 3-5kg/min in every 1000L hydrochloric acid soln, the concentration of hydrochloric acid soln is 180-230g/L, and the temperature of hydrochloric acid soln is 65-80 ℃.
2. the refinery practice of gold containing material as claimed in claim 1 is characterized in that, Sodium Metabisulfite is adopted in reduction, leach liquor once gold reduction take-off potential be+760 arrive+780mv between, the terminal point current potential is+650mv.
3. the refinery practice of gold containing material as claimed in claim 2 is characterized in that, secondary gold reduction terminal point current potential is+350mv.
4. as the refinery practice of the arbitrary described gold containing material of claim 1-3, it is characterized in that leached mud founding behind iron replacement becomes positive plate to carry out silver-colored electrolysis, obtain electrolytic silver.
5. as the refinery practice of the arbitrary described gold containing material of claim 1-3, it is characterized in that, described gold containing material be grade the thick gold between the 30-99.9%, grade at the industrial gold between the 30-99.9% or grade the jewellery gold between 30-99.9%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104471880A CN102560137B (en) | 2011-12-28 | 2011-12-28 | Refining process of alloyed gold |
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| CN2011104471880A CN102560137B (en) | 2011-12-28 | 2011-12-28 | Refining process of alloyed gold |
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| CN102560137A CN102560137A (en) | 2012-07-11 |
| CN102560137B true CN102560137B (en) | 2013-08-28 |
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| CN109926595A (en) * | 2019-03-08 | 2019-06-25 | 三门峡恒河电气科技有限公司 | Production line, gold containing material dusting device and the spray tube of gold containing material Refining |
| MX2023002015A (en) | 2020-08-18 | 2023-04-11 | Enviro Metals Llc | Metal refinement. |
| CN114410981A (en) * | 2022-01-24 | 2022-04-29 | 深圳市点金贵金属精炼有限公司 | Method for refining gold and silver |
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| JPS60208435A (en) * | 1984-04-03 | 1985-10-21 | Nippon Mining Co Ltd | Recovering method of gold |
| JPS6137932A (en) * | 1984-07-30 | 1986-02-22 | Nippon Mining Co Ltd | Method for recovering gold |
| US4895626A (en) * | 1989-04-14 | 1990-01-23 | Shor Peter S | Process for refining and purifying gold |
| CN101451190A (en) * | 2007-11-30 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Novel method for separating gold and silver from gold mud |
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