CN115094236B - Copper ore enhanced leaching method - Google Patents
Copper ore enhanced leaching method Download PDFInfo
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- CN115094236B CN115094236B CN202210857908.9A CN202210857908A CN115094236B CN 115094236 B CN115094236 B CN 115094236B CN 202210857908 A CN202210857908 A CN 202210857908A CN 115094236 B CN115094236 B CN 115094236B
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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
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
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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
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
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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
Abstract
The invention relates to a copper ore enhanced leaching method, and belongs to the field of hydrometallurgy. The lower stack solution of each unit stack in the storage yard is divided into a plurality of groups, and the copper and acid concentrations of the lower stack solutions in each group are different. The unit pile group with short pile-up time adopts the lower pile solution group with high copper concentration and low acid concentration to drop and spray, the unit pile group with long pile-up time adopts the lower pile solution group with low copper concentration and high acid concentration to drop and spray, the whole process operation is simple, and the copper leaching rate is improved.
Description
Technical Field
The invention belongs to the field of hydrometallurgy, and particularly relates to a copper ore reinforced leaching method.
Background
In the current heap leaching process practice of copper mines, the lower heap solution of each unit heap is not finely distinguished according to copper concentration and acid concentration, but is mixed into one solution to serve as the upper heap solution to be used for dripping leaching of the unit heap with different leaching time, so that the copper leaching rate is not high, and the final leaching rate cannot be ensured especially for limited storage area.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problems that: the copper ore intensified leaching method is used for solving the problem of low copper leaching rate in the heap leaching process of copper mines.
(II) technical scheme
In order to solve the technical problems, the invention provides a copper ore enhanced leaching method, which comprises the following steps:
step 1: dividing a copper mine stack field into a plurality of unit stacks according to the length of copper mine heap leaching time from long to short, respectively marking the unit stacks as a 1 unit stack, a 2 unit stack and a Y unit stack, wherein the 1 unit stack leaching time is longest, the copper content is lowest, the Y unit stack leaching time is shortest, the copper content is highest, dividing the Y unit stacks into 4 unit stack groups, namely L groups, M groups, N groups and O groups;
step 2: a solution pool is arranged in cooperation with the unit stack group and is respectively marked as a A, B, C, D, E solution pool, and the copper concentration and the acid concentration in each lower stack solution pool are different;
step 3: the solution pool A is connected to the upper part of the L group unit pile through a pipeline A, the solution pool B is connected to the upper part of the M group unit pile through a pipeline B, the solution pool C is connected to the upper part of the N group unit pile through a pipeline C, the solution pool D is connected to the upper part of the O group unit pile through a pipeline D, the lower part of the L group unit pile is connected to the upper part of the B solution pool through an alpha pipeline, the lower part of the M group unit pile is connected to the upper part of the C solution pool through a beta pipeline, the lower part of the N group unit pile is connected to the D solution pool through a gamma pipeline, and the lower part of the O group unit pile is connected to the E solution pool through a delta pipeline;
step 4: the solution pool A is enabled to be piled on the pile of the L groups through the pipeline a, the solution after being piled on the pile flows to the solution pool B through the pipeline alpha, the solution pool B is piled on the pile of the M groups, the solution after being piled on the pile flows to the solution pool C, the solution pool C is piled on the pile of the N groups, the solution after being piled on the pile flows to the solution pool D, the solution pool D is piled on the pile of the O groups, and the solution after being piled on the pile flows to the solution pool E.
In the step 2, the solution in the solution tank B is a solution tank with low copper concentration and high acid concentration, the solution tank C is a solution tank with medium copper concentration and medium acid concentration, the solution tank D is a solution tank with high copper concentration and low acid concentration, the solution tank E is a solution tank with extremely high copper concentration and extremely low acid concentration, and the solution in the solution tank E is extracted in a workshop to form a solution with extremely low copper concentration and extremely high acid concentration and enters the solution tank A.
The copper mine storage yard in the step 1 is respectively 13 unit stacks from long to short according to the copper mine heap leaching time, wherein the L group leaching time is long and comprises 1 unit stack and 2 unit stacks, the M group leaching time is short and comprises 3 unit stacks, 4 unit stacks and 5 unit stacks, the N group leaching time is short and comprises 6 unit stacks, 7 unit stacks, 8 unit stacks and 9 unit stacks, and the O group leaching time is extremely short and comprises 10 unit stacks, 11 unit stacks, 12 unit stacks and 13 unit stacks.
Wherein, the lower pile of each unit pile enters a B, C, D, E solution pond for dripping and is fed back to a A, B, C, D solution pond for dripping and dripping.
(III) beneficial effects
Compared with the prior art, the invention has the following beneficial effects: the unit pile group with short pile-up time adopts the lower pile solution group with high copper concentration and low acid concentration to drop and spray, the unit pile group with long pile-up time adopts the lower pile solution group with low copper concentration and high acid concentration to drop and spray, the whole process operation is simple, and the copper leaching rate is improved.
Drawings
FIG. 1 is a schematic diagram of the method of the present invention;
FIG. 2 is a flow chart of the method of the present invention.
Detailed Description
For the purposes of clarity, content, and advantages of the present invention, a detailed description of the embodiments of the present invention will be described in detail below with reference to the drawings and examples.
In order to solve the above technical problems, this embodiment provides a copper ore enhanced leaching method, as shown in fig. 1-2, the heap leaching method includes the following steps:
step 1: dividing a copper mine stack field into a plurality of unit stacks according to the length of copper mine heap leaching time from long to short, respectively marking the unit stacks as a 1 unit stack, a 2 unit stack and a Y unit stack, wherein the 1 unit stack leaching time is longest, the copper content is lowest, the Y unit stack leaching time is shortest, the copper content is highest, dividing the Y unit stacks into 4 unit stack groups, namely L groups, M groups, N groups and O groups;
step 2: a solution pool is arranged in cooperation with the unit stack group and is respectively marked as a A, B, C, D, E solution pool, and the copper concentration and the acid concentration in each lower stack solution pool are different;
step 3: the solution pool A is connected to the upper part of the L group unit pile through a pipeline A, the solution pool B is connected to the upper part of the M group unit pile through a pipeline B, the solution pool C is connected to the upper part of the N group unit pile through a pipeline C, the solution pool D is connected to the upper part of the O group unit pile through a pipeline D, the lower part of the L group unit pile is connected to the upper part of the B solution pool through an alpha pipeline, the lower part of the M group unit pile is connected to the upper part of the C solution pool through a beta pipeline, the lower part of the N group unit pile is connected to the D solution pool through a gamma pipeline, and the lower part of the O group unit pile is connected to the E solution pool through a delta pipeline;
step 4: the solution pool A is enabled to be piled on the pile of the L groups through the pipeline a, the solution after being piled on the pile flows to the solution pool B through the pipeline alpha, the solution pool B is piled on the pile of the M groups, the solution after being piled on the pile flows to the solution pool C, the solution pool C is piled on the pile of the N groups, the solution after being piled on the pile flows to the solution pool D, the solution pool D is piled on the pile of the O groups, and the solution after being piled on the pile flows to the solution pool E.
In the step 2, the solution in the solution tank B is a solution tank with low copper concentration and high acid concentration, the solution tank C is a solution tank with medium copper concentration and medium acid concentration, the solution tank D is a solution tank with high copper concentration and low acid concentration, the solution tank E is a solution tank with extremely high copper concentration and extremely low acid concentration, and the solution in the solution tank E is extracted in a workshop to form a solution with extremely low copper concentration and extremely high acid concentration and enters the solution tank A.
The copper mine storage yard in the step 1 is respectively 13 unit stacks from long to short according to the copper mine heap leaching time, wherein the L group leaching time is long and comprises 1 unit stack and 2 unit stacks, the M group leaching time is short and comprises 3 unit stacks, 4 unit stacks and 5 unit stacks, the N group leaching time is short and comprises 6 unit stacks, 7 unit stacks, 8 unit stacks and 9 unit stacks, and the O group leaching time is extremely short and comprises 10 unit stacks, 11 unit stacks, 12 unit stacks and 13 unit stacks.
Wherein, the lower pile of each unit pile enters a B, C, D, E solution pond for dripping and is fed back to a A, B, C, D solution pond for dripping and dripping.
Example 1
As shown in fig. 2, for a certain biological heap leaching copper mine, a classified heap leaching process based on heap leaching time is adopted. The storage yard is divided into 4 groups according to the heap leaching time, 1 and 2 unit piles are L groups, and the leaching time is 300-350 days; the leaching time of the 3-5 unit stacks is 200-300 days for M groups; the leaching time of the 6-9 unit stacks for N groups is 100-200 days; the leaching time of the group O is 0-100 days for 10-13 units; dividing the lower stack solution of each unit stack into 4 groups according to copper concentration and acid concentration, wherein 1-3 unit stacks are B groups, the copper concentration of each lower stack of each unit stack is 1.5-2.5g/L, and the acid concentration of each lower stack of each unit stack is 15-16g/L, and all the lower stack solution enters a solution pool B; the solution of the under-unit pile of 4-7 units is C group, copper concentration of each under-unit pile is 2.5-3.5g/L, acid concentration is 12-15g/L, and the solution of the under-unit pile is all fed into the solution pool C. The solution of the under-unit pile of 8-11 units is a group D, the copper concentration of each under-unit pile is 3.5-4.5g/L, the acid concentration is 10-12g/L, and the solution of the under-unit pile is all fed into the solution pool D. The solution of the under-unit pile of 12-13 units is E group, copper concentration of each under-unit pile is 4.5-5.5g/L, acid concentration is 9-10g/L, and the solution of the under-unit pile is all fed into solution pool E. The solution in the solution tank E passes through an extraction workshop to form raffinate, and the raffinate enters the solution tank A to be used as group A, wherein the copper concentration is 0.5-0.8g/L, and the acid concentration is 16.5-17.5 g/L.
And finally determining a classified heap leaching process: the solution of the group A is sprayed on the pile of the group L, the solution of the group B is sprayed on the pile of the group M, the solution of the group C is sprayed on the pile of the group N, and the solution of the group D is sprayed on the pile of the group O. That is, the number of groups of unit piles in terms of leaching time is 4 (L, M, N, O respectively), the number of groups of solution in the lower pile of unit piles is 4 (B, C, D, E respectively), and the number of groups of solution in the upper pile of unit piles is 4 (A, B, C, D respectively). The heap leaching technology can ensure the final leaching rate of 1 and 2 unit heap with long leaching time, and the copper concentration and acid concentration of heap solution under 12 and 13 units.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (2)
1. A copper ore enhanced leaching method, characterized in that the method comprises the following steps:
step 1: dividing a copper mine stack field into a plurality of unit stacks according to the length of copper mine heap leaching time from long to short, respectively marking the unit stacks as a 1 unit stack, a 2 unit stack and a Y unit stack, wherein the 1 unit stack leaching time is longest, the copper content is lowest, the Y unit stack leaching time is shortest, the copper content is highest, dividing the Y unit stacks into 4 unit stack groups, namely L groups, M groups, N groups and O groups;
step 2: a solution pool is arranged in cooperation with the unit stack group and is respectively marked as a A, B, C, D, E solution pool, and the copper concentration and the acid concentration in each lower stack solution pool are different;
step 3: the solution pool A is connected to the upper part of the L group unit pile through a pipeline A, the solution pool B is connected to the upper part of the M group unit pile through a pipeline B, the solution pool C is connected to the upper part of the N group unit pile through a pipeline C, the solution pool D is connected to the upper part of the O group unit pile through a pipeline D, the lower part of the L group unit pile is connected to the upper part of the B solution pool through an alpha pipeline, the lower part of the M group unit pile is connected to the upper part of the C solution pool through a beta pipeline, the lower part of the N group unit pile is connected to the D solution pool through a gamma pipeline, and the lower part of the O group unit pile is connected to the E solution pool through a delta pipeline;
step 4: enabling the solution pool A to be piled on the pile of the group L through the pipeline a, enabling the solution after being piled on the pile to flow to the solution pool B through the pipeline alpha, enabling the solution pool B to be piled on the pile of the group M, enabling the solution after being piled on the pile to flow to the solution pool C, enabling the solution pool C to be piled on the pile of the group N, enabling the solution after being piled on the pile to flow to the solution pool D, enabling the solution pool D to be piled on the pile of the group O, and enabling the solution after being piled on the pile to flow to the solution pool E;
wherein in the step 2, B is a solution tank with low copper concentration and high acid concentration, C is a solution tank with medium copper concentration and medium acid concentration, D is a solution tank with high copper concentration and low acid concentration, E is a solution tank with extremely high copper concentration and extremely low acid concentration, and E is prepared by extracting solution in the solution tank through a workshop to form a solution with extremely low copper concentration and extremely high acid concentration, and the solution enters the solution tank A;
the copper mine storage yard in the step 1 is respectively 13 unit stacks from long to short according to the copper mine heap leaching time, wherein the L group leaching time is long and comprises 1 unit stack and 2 unit stacks, the M group leaching time is short and comprises 3 unit stacks, 4 unit stacks and 5 unit stacks, the N group leaching time is short and comprises 6 unit stacks, 7 unit stacks, 8 unit stacks and 9 unit stacks, and the O group leaching time is extremely short and comprises 10 unit stacks, 11 unit stacks, 12 unit stacks and 13 unit stacks.
2. The method for intensified leaching of copper ores according to claim 1, wherein each unit pile is fed back to A, B, C, D number solution tank for dripping after entering B, C, D, E number solution tank for dripping.
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