CN108866347A - A kind of heavy copper method of cupric cyanide-leached solution - Google Patents
A kind of heavy copper method of cupric cyanide-leached solution Download PDFInfo
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- CN108866347A CN108866347A CN201810738422.7A CN201810738422A CN108866347A CN 108866347 A CN108866347 A CN 108866347A CN 201810738422 A CN201810738422 A CN 201810738422A CN 108866347 A CN108866347 A CN 108866347A
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- cyanide
- heavy copper
- cupric
- leached solution
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
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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 present invention relates to a kind of heavy copper method of cupric cyanide-leached solution, mainly solves the problems, such as the eutectoid content of copper ion in cyanide-leached solution on the activated carbon with gold.The cyanide-leached solution of cupric is sprayed using the mine heap quarrel of dump leaching middle and later periods as heavy copper carrier and is carried out the heavy copper of mine heap into the mine heap by this method, and heavy copper rate reaches 75% or more, reaches as high as 98%；Foreign ion declines 50%-80% in cyanide-leached solution after heavy copper, gold does not lose, remaining lean solution supplement cyanogen root may return to gold mine and carry out dump leaching again after activated carbon adsorption, can make to soak leaching rate raising 3%~5% golden in heap by handling above, while realizing recycling for lean solution.Whole process is not necessarily to add any other medicament or increases new equipment, has many advantages, such as that heavy copper effect is good, high-efficient, treating capacity is big, simple process is easy to operate, low in cost.
Description
Technical field
The present invention relates to metallurgical technology fields, and in particular to a kind of heavy copper method of cupric cyanide-leached solution.
Background technique
Currently, cyanidation gold-extracted method is the main method to extract gold from.However Cyanide Leaching is used for copper-bearing gold ore
There are cyanide consumption amounts greatly, competitive Adsorption etc. occurs on the activated carbon and asks for copper ion contained in cyanide-leached solution and gold ion
Topic, seriously reduces the ability of activated carbon adsorption of gold, and the smelting of the desorption and gold to subsequent gold loaded carbon has an adverse effect.
In recent years, the method for the processing high-copper cyanide-leached solution that research and development was got up mainly has hydrogen peroxide to sink copper method, sulphur
Change and be acidified the processing methods such as heavy copper method, the relevant technologies are referring to documents such as Chinese patent CN104294057A, CN102978393A.So
And all there is the disadvantages of processing cost is high, inconvenient for operation, cost of investment is big, treating capacity is small in these methods, particularly with a large amount of
High-copper contain golden pregnant solution of heap leaching (cyanide-leached solution) and be difficult to realize industrial treatment.
The present invention carries out spraying heavy copper with mine heap of the cupric cyanide-leached solution to the dump leaching middle and later periods, and gained immersion liquid is through active carbon
Absorption, parsing and etc. isolate proof gold, return to mine heap after remaining lean solution supplement Cymag after absorption and soak gold, heavy copper again,
Whole process does not need to add any other medicament and does not need investment new equipment yet, has simple process, is easily manipulated, is at low cost
The advantages such as honest and clean.
Summary of the invention
It is an object of the invention to solve, heap leaching solution cupric present in existing gold mine cyaniding dump leaching process is high, carries golden carbon hair
The problems such as raw gold copper eutectoid content, subsequent desorption difficulty, it is a kind of heavy by the cupric cyanide-leached solution of carrier of leached mud mine heap to provide
Copper method, this method are specific as follows：
(a) copper-bearing gold ore is leached using Cyanide Leaching agent, obtains cupric cyanide-leached solution；
(b) cupric cyanide-leached solution spray is subjected to heavy copper on the mine heap of dump leaching middle and later periods, cyaniding is soaked after obtaining heavy copper
Golden liquid.
Further, the heavy copper method is further comprising the steps of：Cyanide-leached solution after heavy copper is carried out using active carbon
Absorption obtains lean solution and carries golden carbon, and the golden carbon of the load obtains proof gold through subsequent processings such as desorption, electrodeposition, adds in the lean solution
Regenerated Cyanide Leaching agent is obtained after cyanide, regenerated Cyanide Leaching agent is re-used for the leaching of copper-bearing gold ore, thus
Realize circulating leaching, heavy copper.
Further, regenerated Cyanide Leaching agent pH is 9-11, and the concentration of cyanogen root is no more than a ten thousandth.
Further, the Leaching way of copper-bearing gold ore includes dump leaching, drill traverse etc. in step (a).
Further, the Leaching way in step (a) is specially dump leaching, is included the following steps：First by copper gold
Stone is crushed, washup, classification, and ore particle hybrid reactor of different sizes is then built up mine heap, then sprays Cyanide Leaching agent
Onto mine heap, spraying intensity is (10-15) L/ (m2·h)。
Further, the pH of Cyanide Leaching agent described in step (a) is 9-11, the mass concentration of cyanogen root is no more than ten thousand/
One.
Further, the mine heap of step (b) the dump leaching middle and later periods is selected from existing dump leaching mine heap, or utilizes dump leaching slag
Again heap builds the mine heap for the high 5-20m to be formed, and ore grain size is 1mm-800mm in mine heap.
Further, the pH of cupric cyanide-leached solution is 9-11 in step (b), the mass concentration of cyanogen root is no more than ten thousand/
One, spraying intensity is (10-15) L/ (m2·h)。
Further, the copper-bearing gold ore is selected from the gold sulphide ores such as single gold ore, associated gold ore.
Further, gold content is (0.20-0.80) g/t in the copper-bearing gold ore, and copper content is (0.020-
0.085) %.
Compared with the method for other additional heavy copper reagent, the application utilizes cupric using the mine heap of dump leaching middle and later periods as carrier
Gold leachate obtained by gold ore cyanide heap leaching carries out copper-coating to it, and cyanide-leached solution is through Activated Carbon Adsorption Separation after the heavy copper of gained
Out after gold, cyanide is added and renewable at Cyanide Leaching agent, for the cyanide heap leaching of other copper-bearing gold ores, not additional
The purpose that heavy copper and waste liquid circulation utilize is realized in the case where adding other medicaments.Compared with prior art, the present invention has
Beneficial effect include：
(a) heavy copper effect is good, high-efficient, and treating capacity is big, and gold does not lose.After mine heap sinks copper, cupric cyanide-leached solution
Heavy copper rate can reach 75% or more, reach as high as 98% using the heavy copper rate of interruption spray, impurity in cyanide-leached solution after heavy copper
Ion declines 50%-80%, and auri does not originally lose.
(b) simple process, easily operated control is low in cost, without adding any other medicament or increasing new equipment.Through
Measuring and calculating handles 1/5th of expense less than existing other methods of every cube of cupric cyanide-leached solution.
(c) to the adaptable of ore, heavy copper can be carried out to the cupric cyanide-leached solution that the modes such as drill traverse or dump leaching generate
Processing.PH value variation is smaller to heavy copper influential effect, and dump leaching ore pH value has good heavy copper effect in 9-11, for containing cyanogen
The heavy copper effect of the lower cupric sodium of root is more obvious.
(d) your liquid component obtained by copper of sinking is simple, is conducive to the progress of subsequent technique.Your high liquid of cupric is by heavy copper carrier
After mine heap, a large amount of foreign ion is deposited to simultaneously inside mine heap, your liquid after the sedimentation of mine heap, gold contained therein is easy to
It adsorbs on the activated carbon, while being also beneficial to the recycling of the lean solution after activated carbon adsorption.
(e) leaching rate of gold can be improved.Lean solution obtained by activated carbon adsorption is back to heap leaching of gold ores after regeneration and goes out, and can make
It soaks leaching rate golden in heap and improves 3%-5%.
Detailed description of the invention
Fig. 1 is one of process flow chart of the invention.
Specific embodiment
To make those of ordinary skill in the art fully understand technical solution of the present invention and beneficial effect, below in conjunction with attached drawing
The invention will be further described with specific embodiment, but protection scope of the present invention is not limited to the content.
Embodiment 1
The 0.36g/t containing gold in certain gold mine, cupric 0.025% (mass percent, similarly hereinafter).
(1) by ore reduction, maximum particle size is controlled within 500mm, and heap is built in washup, and adjusting mine heap basicity is 10, is used
Mass concentration is the sodium cyanide solution of a ten thousandth with 12L/ (m2H) speed sprays mine heap.
(2) when gold mine heap shower-bubble type is to mid-term, part slag is taken to build heap, a height of 10 meters of heap.
(3) by cupric cyanide-leached solution obtained in step (1) with 10L/ (m2H) speed is sprayed to step (2)
Heavy copper is carried out in mine heap.Wherein the cyanogen root mass concentration of gained cupric cyanide-leached solution is 0.008% in step (1), pH value
9.5, cupric 150mg/L, the 0.21mg/L containing gold.
(4) cyanide-leached solution after mine heap sinks copper, copper concentration drop to 25mg/L, and copper rate of sinking is 83.33%, gold content
For 0.23mg/L, golden free of losses.
Embodiment 2
The 0.79g/t containing gold in certain gold mine, cupric 0.083%.
(1) by ore reduction, maximum particle size is controlled within 500mm, and heap is built in washup, and adjusting mine heap basicity is 11, is used
Concentration is the sodium cyanide solution of a ten thousandth with 15L/ (m2H) speed sprays mine heap.
(2) when gold mine heap shower-bubble type is to mid-term, part slag is taken to build heap, a height of 20 meters of heap.
(3) by cupric cyanide-leached solution obtained in step (1) with 13L/ (m2H) speed is sprayed to step (2)
Heavy copper is carried out in mine heap.Wherein the cyanogen root mass concentration of gained cupric cyanide-leached solution is 0.009% in step (1), pH value
9.0, cupric 178mg/L, the 0.28mg/L containing gold.
(4) cyanide-leached solution after mine heap sinks copper, copper concentration drop to 15mg/L, and copper rate of sinking is 91.57%, gold content
For 0.27mg/L, golden free of losses.
(5) cyanide-leached solution after heavy copper obtains carrying golden carbon and lean solution after activated carbon adsorption, carries golden carbon through desorption, electrodeposition
Etc. subsequent processings obtain proof gold, lean solution, which is added, to be back to new mine heap after Cymag etc. to initial pH value, cyanogen root concentration and carries out
It leaches, the leaching rate for measuring gold improves 5%.
Embodiment 3
The 0.33g/t containing gold in certain gold mine, cupric 0.027%.
(1) by ore reduction, maximum particle size is controlled within 500mm, and heap is built in washup, and adjusting mine heap basicity is 10, is used
Mass concentration is the sodium cyanide solution of a ten thousandth with 10L/ (m2H) speed sprays mine heap.
(2) when gold mine heap shower-bubble type is to mid-term, part slag is taken to build heap, a height of 15 meters of heap.
(3) by cupric cyanide-leached solution obtained in step (1) with 15L/ (m2H) speed is sprayed to step (2)
Heavy copper is carried out in mine heap.Wherein the cyanogen root mass concentration of gained cupric cyanide-leached solution is 0.008% in step (1), pH value
9.0, cupric 159mg/L, the 0.23mg/L containing gold.
(4) cyanide-leached solution after mine heap sinks copper, copper concentration drop to 35mg/L, and copper rate of sinking is 77.99%, gold content
For 0.25mg/L, golden free of losses.
Embodiment 4
The 0.28g/t containing gold in certain gold mine, cupric 0.065%.
(1) by ore reduction, maximum particle size is controlled within 500mm, and heap is built in washup, and adjusting mine heap basicity is 10, is used
Mass concentration is the sodium cyanide solution of a ten thousandth with 10L/ (m2H) speed sprays mine heap.
(2) when gold mine heap shower-bubble type is to mid-term, part slag is taken to build heap, a height of 10 meters of heap.
(3) by cupric cyanide-leached solution obtained in step (1) with 10L/ (m2H) speed is sprayed to step (2)
Heavy copper is carried out in mine heap.Wherein the cyanogen root mass concentration of gained cyanide-leached solution is 0.01% in step (1), pH value 9.5, cupric
190mg/L, the 0.11mg/L containing gold.
(4) cyanide-leached solution after mine heap sinks copper, copper concentration drop to 13mg/L, and copper rate of sinking is 93.16%, gold content
For 0.13mg/L, golden free of losses.
(5) cyanide-leached solution after heavy copper obtains carrying golden carbon and lean solution after activated carbon adsorption, carries golden carbon through desorption, electrodeposition
Etc. subsequent processings obtain proof gold, lean solution is back to new mine heap after adding Cymag etc. to initial pH value, cyanogen root concentration, measures
The leaching rate of gold improves 3%.
Claims (10)
1. a kind of heavy copper method of cupric cyanide-leached solution, which is characterized in that include the following steps：
(a) copper-bearing gold ore is leached using Cyanide Leaching agent, obtains cupric cyanide-leached solution；
(b) cupric cyanide-leached solution spray is subjected on the mine heap of dump leaching middle and later periods heavy copper, obtains cyanide-leached solution after heavy copper.
2. a kind of heavy copper method of cupric cyanide-leached solution as described in claim 1, which is characterized in that the heavy copper method is also
Include the following steps：Cyanide-leached solution after heavy copper is adsorbed using active carbon, obtain lean solution and carries golden carbon, the golden carbon of the load
Proof gold is obtained through subsequent processings such as desorption, electrodeposition, obtains regenerated Cyanide Leaching agent after cyanide is added in the lean solution, it will again
Raw Cyanide Leaching agent is re-used for the leaching of copper-bearing gold ore, is achieved in circulating leaching, heavy copper.
3. a kind of heavy copper method of cupric cyanide-leached solution as claimed in claim 2, it is characterised in that：Regenerated Cyanide Leaching
Agent pH is 9-11, and the mass concentration of cyanogen root is no more than a ten thousandth.
4. a kind of heavy copper method of cupric cyanide-leached solution as described in claim 1, it is characterised in that：Cupric in step (a)
The Leaching way of gold ore includes dump leaching, drill traverse.
5. a kind of heavy copper method of cupric cyanide-leached solution as claimed in claim 4, which is characterized in that the leaching in step (a)
Mode is dump leaching out, and concrete operations are：Copper-bearing gold ore is crushed first, washup, classification, then by mine of different sizes
Grain hybrid reactor builds up mine heap, then sprays Cyanide Leaching agent onto mine heap, and spraying intensity is (10-15) L/ (m2·h)。
6. a kind of heavy copper method of cupric cyanide-leached solution as described in claim 1, it is characterised in that：Described in step (a)
The pH of Cyanide Leaching agent is 9-11, and the mass concentration of cyanogen root is no more than a ten thousandth.
7. a kind of heavy copper method of cupric cyanide-leached solution as described in claim 1, it is characterised in that：Step (b) heap
The mine heap for soaking the middle and later periods is existing dump leaching mine heap, or the mine heap for the high 5-20m to be formed, mine heap are built using dump leaching slag again heap
Middle ore grain size is 1mm-800mm.
8. a kind of heavy copper method of cupric cyanide-leached solution as described in claim 1, it is characterised in that：Cupric in step (b)
The pH of cyanide-leached solution is 9-11, and the mass concentration of cyanogen root is no more than a ten thousandth, and spraying intensity is (10-15) L/ (m2·h)。
9. a kind of heavy copper method of cupric cyanide-leached solution as described in claim 1, it is characterised in that：The copper-bearing gold ore
Selected from one of single gold ore, associated gold ore and other gold sulphide ores.
10. a kind of heavy copper method of cupric cyanide-leached solution as claimed in claim 9, it is characterised in that：The copper gold
Gold content in stone is (0.20-0.80) g/t, and the mass content of copper is (0.020-0.085) %.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021181275A1 (en) * | 2020-03-09 | 2021-09-16 | Beylefeld Barend Jacobus | A noble and base metal recovery process |
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