CN117463500A - JXC beneficiation process for copper smelting flash smelting slag - Google Patents
JXC beneficiation process for copper smelting flash smelting slag Download PDFInfo
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- CN117463500A CN117463500A CN202311657967.2A CN202311657967A CN117463500A CN 117463500 A CN117463500 A CN 117463500A CN 202311657967 A CN202311657967 A CN 202311657967A CN 117463500 A CN117463500 A CN 117463500A
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- tailings
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- 239000002893 slag Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 60
- 239000010949 copper Substances 0.000 title claims abstract description 52
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 51
- 238000003723 Smelting Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 40
- 238000000227 grinding Methods 0.000 claims abstract description 76
- 239000012141 concentrate Substances 0.000 claims abstract description 68
- 230000002000 scavenging effect Effects 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 19
- 239000002562 thickening agent Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 8
- DSCFFEYYQKSRSV-UHFFFAOYSA-N 1L-O1-methyl-muco-inositol Natural products COC1C(O)C(O)C(O)C(O)C1O DSCFFEYYQKSRSV-UHFFFAOYSA-N 0.000 claims description 27
- VJXUJFAZXQOXMJ-UHFFFAOYSA-N D-1-O-Methyl-muco-inositol Natural products CC12C(OC)(C)OC(C)(C)C2CC(=O)C(C23OC2C(=O)O2)(C)C1CCC3(C)C2C=1C=COC=1 VJXUJFAZXQOXMJ-UHFFFAOYSA-N 0.000 claims description 27
- DSCFFEYYQKSRSV-KLJZZCKASA-N D-pinitol Chemical compound CO[C@@H]1[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)[C@H]1O DSCFFEYYQKSRSV-KLJZZCKASA-N 0.000 claims description 27
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 27
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 27
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 27
- 238000005188 flotation Methods 0.000 claims description 24
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical group [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 239000008396 flotation agent Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 8
- 239000000047 product Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 229910001779 copper mineral Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052840 fayalite Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- -1 mixed matte Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 102220013078 rs140245123 Human genes 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229910052642 spodumene Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a JXC beneficiation process of copper smelting flash smelting slag, which comprises the following steps: rough grinding procedure: slag in the powder ore bin is fed into a first rubber belt conveyor through a heavy plate feeder and is sent to a semi-autogenous mill for ore grinding, and the discharged materials of the semi-autogenous mill are screened through a linear vibrating screen; a first stage grinding, classifying and sorting procedure; a second-stage grinding classifying and sorting procedure; regrinding and classifying middling; and (3) a step of dehydrating the tailings: the coarse concentrate and the fine concentrate are conveyed into a concentrate thickener through a concentrate conveying slurry pump for concentration, the concentrated concentrate is conveyed into a filter press for filtration to obtain the final concentrate, and the tailings after scavenging are conveyed into the tailings thickener for concentration through a tailings conveying pump. The middling is pumped to a middling cyclone for grading, overflow of middling grading returns to a coarse second stirring barrel, sand setting enters a vertical mill to form closed-circuit grinding, middling grading regrinding is carried out on primary tailings and tertiary scavenging concentrate, so that copper content of slag tailings is reduced, and recovery rate of copper is improved.
Description
Technical Field
The invention relates to the technical field of metallurgical beneficiation, in particular to a beneficiation process of copper smelting flash smelting slag.
Background
With the rapid development of social economy, the consumption of copper metal in China is rapidly increased, the demand for copper resources is also increased, the quantity of copper slag is increased year by year, the average annual copper slag production is about 2000 tens of thousands of tons, the metal copper in slag is about 30 tens of thousands of tons, the metal iron is 1000 tens of thousands of tons and other valuable elements, the resource value and the economic value are higher, but at the same time, the copper ore resources are increasingly poor, and the comprehensive recovery of copper smelting slag is necessary in order to respond to the call of the national development of circular economy.
Chinese patent CN111185296B discloses a copper smelting slag beneficiation method, which comprises the following steps: (1) Copper smelting slag sequentially undergoes coarse crushing, semi-autogenous grinding, primary grading and secondary grading; (2) entering a stirring tank, and adding a flotation reagent to carry out size mixing; (3) Sequentially carrying out coarse first, coarse second, primary scavenging, secondary scavenging and coarse selection; (4) sequentially carrying out magnetic separation, ore grinding and classification; (3) three-stage flotation.
However, this solution has the following drawbacks:
1. when the ore dressing process of copper smelting slag grinding and flotation is carried out in a first coarse step, coarse-grain copper sulfide which is easy to recycle cannot be recycled in advance, so that the copper sulfide is easy to overgrind and influence the recycling effect in the subsequent ore grinding operation;
2. the beneficiation process in the scheme cannot be used for classifying and regrinding middlings generated by first concentration and three times of scavenging from the viewpoint of finer embedding granularity of slag, so that the finally generated slag tailings have higher copper content, and the recovery rate of copper is lower.
The foregoing is provided merely to facilitate an understanding of the principles of the invention and is not intended to constitute an admission that the foregoing is of the closest prior art.
Disclosure of Invention
The invention aims to provide a JXC beneficiation process of copper smelting flash smelting slag, which aims to solve the problems that the prior beneficiation process in the background art can not recover coarse-grain copper sulfide which is easy to recover in advance, so that the recovery effect is influenced by overgrinding of copper sulfide in the subsequent grinding process, and middling grading regrinding is carried out on middling which is produced by primary concentration and three scavenging cannot be realized, so that the recovery rate of copper is lower.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a JXC beneficiation process of copper smelting flash smelting slag comprises the following steps:
rough grinding procedure: slag in the powder ore bin is fed into a first rubber belt conveyor through a heavy plate feeder and is conveyed to a semi-automatic mill for ore grinding, discharge materials of the semi-automatic mill are screened through a linear vibrating screen, and materials on the screen are conveyed to the first belt through a second belt and a third belt and returned to the semi-automatic mill to form closed-circuit ore grinding;
a step of grinding, classifying and sorting: the materials screened by the linear vibrating screen are conveyed to a raw ore sampler through a semi-self-grinding discharge conveying slurry pump, raw ore class samples are taken and discharged into a stage-grading feeding pump pool to be combined with ball-milling discharge, the combined materials are conveyed to a stage-grading cyclone through a stage-grading feeding pump to carry out stage-grading operation, the stage-grading sand setting automatically flows into a ball mill to carry out ore grinding operation, the stage-grading overflow enters a coarse-flotation operation, and the obtained foam is final concentrate 1;
two-stage grinding classifying and sorting process: conveying the tailings subjected to rough first flotation into a second-stage classification cyclone by a second-stage classification feed pump to perform second-stage classification operation, enabling the second-stage classification sand to flow into a ball mill automatically to form closed-circuit grinding, enabling second-stage classification overflow and middling classification overflow to flow into a rough second stirring barrel automatically to be combined, performing rough second and third scavenging operation, and performing third concentration on concentrate subjected to rough second flotation to obtain final concentrate 2, wherein the tailings subjected to third scavenging are final tailings;
middling regrinding and classifying procedure: the tailings of the first refining, the concentrate subjected to three scavenging and the middling vertical mill discharge are combined in a middling pump pool, middling classification operation is carried out by feeding middling classification cyclone through middling classification feed pump, middling classification sand setting enters a vertical mill for regrinding, middling classification overflow returns to a coarse second stirring barrel and is combined with second-stage classification overflow to enter coarse second classification operation;
and (3) a step of dehydrating the tailings: the coarse first and fine third concentrates 1,2 are conveyed into a concentrate thickener for concentration through a concentrate conveying slurry pump, the concentrated concentrates are conveyed into a filter press for filtering and dewatering operation to obtain final concentrates, the three-swept tailings are conveyed into a tailings thickener for concentration through a tailings conveying pump, and the concentrated tailings are conveyed into a ceramic filter for filtering and dewatering operation to obtain slag tailings.
Further, after ore discharge of the semi-automatic mill in the rough grinding process is screened by the linear vibrating screen, the oversize materials which do not pass through the screen plate of the vibrating screen are sent into the semi-automatic mill by the second rubber belt conveyor and the third rubber belt conveyor to form closed-circuit ore grinding.
Further, the main component of the concentrate obtained after the coarse operation in the primary grinding, classifying and sorting procedure is copper sulfide.
Further, tailings after the second stage grading overflow flow coarse second flotation and the third scavenging in the second stage grinding grading separation procedure are final tailings, the tailings are conveyed to a tailings thickener by a tailings conveying slurry pump to be concentrated, the concentrated tailings are conveyed to a filter to be filtered and dehydrated to produce slag tailings, and the slag tailings can be sold as production raw materials of cement.
Further, the settled sand of the first-stage grinding classification and the second-stage grinding classification automatically flows into the ball mill, is further ground by the ball mill and then is discharged to be combined with the materials discharged by the raw ore sampler, and is then pumped into a first-stage classification cyclone by a first-stage classification feeding pump to carry out classification operation.
Further, the grinding concentration of the ball mill is 80%, the primary stage grading overflow concentration is 45% -55%, the fineness is-200 meshes and is more than 70%, the secondary stage grading overflow concentration is 30% -40%, the fineness is-400 meshes and is more than 80%, the middling stage grading overflow concentration is 18% -25%, and the fineness is-600 meshes and is more than 90%.
Further, the middlings are a mixture of the primary tailings and tertiary scavenger concentrates.
Furthermore, the middling classifying cyclone in the middling regrinding classifying procedure carries out classifying operation on middlings, the continuously-living target minerals with larger granularity in the middlings automatically flow into the middling vertical mill in a sand setting mode to carry out regrinding, the well-ground middlings are discharged into a middling pump pool to be combined with the concentrate and the refined tailings which are subjected to tertiary scavenging, and the middling concentrate classifying cyclone is fed into the middling classifying cyclone again through the middling classifying feed pump to carry out classifying operation, so that closed circuit grinding classification is formed.
Further, the size of the discharge grid plate of the semi-autogenous mill in the rough grinding process is 45mm, the mesh size of the linear vibrating screen is 8mm 29mm, and the semi-autogenous grinding concentration is 75%.
Further, sodium sulfide, butyl xanthate and pinitol oil are added into a coarse first stirring barrel corresponding to coarse first flotation, the dosage of the sodium sulfide, the butyl xanthate and the pinitol oil is 20-30g/t, 30-40g/t and 40-50g/t respectively, sodium sulfide, butyl xanthate and pinitol oil are added into a coarse second stirring barrel, the dosage of the sodium sulfide, butyl xanthate and pinitol oil is 30-40g/t, 35-45g/t and 10-15g/t respectively, the dosage of the sodium sulfide, butyl xanthate and pinitol oil is 10-20g/t, 10-20g/t and 5-10g/t respectively, the sodium sulfide, butyl xanthate and pinitol oil are added into a coarse second stirring barrel, the dosage of the sodium sulfide, butyl xanthate and pinitol oil is 5-15g/t, 5-15g/t respectively, and the dosage of the sodium sulfide, butyl xanthate and the pinitol oil is 5-10g/t, 5-10g/t respectively.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, before the secondary grinding and classifying process, the coarse-grain copper sulfide which is easy to recycle is recycled in advance by the roughing flotation machine, so that overgrinding of copper minerals which are dissociated by a monomer is effectively prevented, and the copper recovery rate is improved.
2. According to the invention, the concentrate from the primary tailings and the tertiary scavenging concentrate are combined and serve as middlings to enter a middling grading feed pump pool, the middling grading feed pump pool is used for conveying the middling concentrate to a middling cyclone for grading, overflow of middling grading returns to a coarse second stirring barrel, sand setting enters a vertical mill to form closed-circuit grinding, and middling grading regrinding is carried out on the primary tailings and the tertiary scavenging concentrate, so that copper content of the slag tailings is reduced, and the recovery rate of copper is improved.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic view of the working state of the present invention;
FIG. 3 is an enlarged view of the present invention at A in FIG. 2;
FIG. 4 is an enlarged view of the present invention at B in FIG. 2;
FIG. 5 is an enlarged view of the present invention at C in FIG. 2;
fig. 6 is an enlarged view of the present invention at D in fig. 2.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-6, the present invention provides a technical solution:
a JXC beneficiation process of copper smelting flash smelting slag comprises the following steps:
rough grinding procedure: slag in the powder ore bin is fed into a first rubber belt conveyor through a heavy plate feeder and is conveyed to a semi-automatic mill for ore grinding, discharge materials of the semi-automatic mill are screened through a linear vibrating screen, and materials on the screen are conveyed to the first belt through a second belt and a third belt and returned to the semi-automatic mill to form closed-circuit ore grinding;
a step of grinding, classifying and sorting: the materials screened by the linear vibrating screen are conveyed to a raw ore sampler through a semi-self-grinding discharge conveying slurry pump, raw ore class samples are taken and discharged into a stage-grading feeding pump pool to be combined with ball-milling discharge, the combined materials are conveyed to a stage-grading cyclone through a stage-grading feeding pump to carry out stage-grading operation, the stage-grading sand setting automatically flows into a ball mill to carry out ore grinding operation, the stage-grading overflow enters a coarse-flotation operation, and the obtained foam is final concentrate 1;
two-stage grinding classifying and sorting process: conveying the tailings subjected to rough first flotation into a second-stage classification cyclone by a second-stage classification feed pump to perform second-stage classification operation, enabling the second-stage classification sand to flow into a ball mill automatically to form closed-circuit grinding, enabling second-stage classification overflow and middling classification overflow to flow into a rough second stirring barrel automatically to be combined, performing rough second and third scavenging operation, and performing third concentration on concentrate subjected to rough second flotation to obtain final concentrate 2, wherein the tailings subjected to third scavenging are final tailings;
middling regrinding and classifying procedure: the tailings of the first refining, the concentrate subjected to three scavenging and the middling vertical mill discharge are combined in a middling pump pool, middling classification operation is carried out by feeding middling classification cyclone through middling classification feed pump, middling classification sand setting enters a vertical mill for regrinding, middling classification overflow returns to a coarse second stirring barrel and is combined with second-stage classification overflow to enter coarse second classification operation;
and (3) a step of dehydrating the tailings: the coarse first and fine third concentrates 1,2 are conveyed into a concentrate thickener for concentration through a concentrate conveying slurry pump, the concentrated concentrates are conveyed into a filter press for filtering and dewatering operation to obtain final concentrates, the three-swept tailings are conveyed into a tailings thickener for concentration through a tailings conveying pump, and the concentrated tailings are conveyed into a ceramic filter for filtering and dewatering operation to obtain slag tailings.
It should be noted that: according to the invention, before the secondary grinding and classifying and separating process, a part of easily recovered copper sulfide is recovered in advance by the roughing flotation machine for pre-recovery, so that overgrinding of copper minerals which are dissociated by a monomer is effectively prevented, and the copper recovery rate is improved.
The slag in the present invention is flash smelting slag.
As improvement, after ore discharge of the semi-automatic mill in the rough grinding process is screened by a linear vibrating screen, oversize materials which do not pass through a screen plate of the vibrating screen are sent into the semi-automatic mill by a second rubber belt conveyor and a third rubber belt conveyor to form closed-circuit ore grinding.
As an improvement, the main component of the concentrate obtained after the coarse-stage operation in the primary grinding classification process is copper sulfide.
As an improvement, tailings after the second stage grading overflow flow coarse second flotation and the third scavenging in the second stage grinding grading separation procedure are final tailings, the tailings are conveyed to a tailings thickener by a tailings conveying slurry pump to be concentrated, the concentrated tailings are conveyed to a filter to be filtered and dehydrated to produce slag tailings, and the slag tailings can be sold as production raw materials of cement.
As an improvement, the settled sand of the primary grinding classification and the secondary grinding classification automatically flows into the ball mill, is further ground by the ball mill and then is discharged to be combined with the materials discharged by the raw ore sampler, and is then pumped into a primary classification cyclone by a primary classification feeding pump to carry out classification operation.
Further, the grinding concentration of the ball mill is 80%, the primary stage grading overflow concentration is 45% -55%, the fineness is-200 meshes and is more than 70%, the secondary stage grading overflow concentration is 30% -40%, the fineness is-400 meshes and is more than 80%, the middling stage grading overflow concentration is 18% -25%, and the fineness is-600 meshes and is more than 90%.
As an improvement, the middlings are a mixture of concentrate-tailings and tertiary scavenger concentrate.
As improvement, the middling classifying cyclone in the middling regrinding classifying procedure carries out classifying operation on middlings, the continuously-living target minerals with larger granularity in the middlings automatically flow into the middling vertical mill in a sand setting mode to carry out regrinding, the well-ground middlings are discharged into a middling pump pool to be combined with the concentrate and the refined tailings which are subjected to tertiary scavenging, and the middling concentrate classifying cyclone is fed into the middling classifying cyclone again through a middling classifying feed pump to carry out classifying operation, so that closed circuit grinding classification is formed.
As an improvement, the size of a discharge grid plate of the semi-autogenous mill in the rough grinding process is 45mm, the size of a screen hole of a linear vibrating screen is 8mm 29mm, and the concentration of semi-autogenous grinding ore is 75%.
As improvement, sodium sulfide, butyl xanthate and pinitol oil are added into a coarse first stirring barrel corresponding to coarse first flotation, the dosage of the sodium sulfide, the butyl xanthate and the pinitol oil is respectively 20-30g/t, 30-40g/t and 40-50g/t, sodium sulfide, butyl xanthate and pinitol oil are added into a coarse second stirring barrel, the dosage of the sodium sulfide, butyl xanthate and pinitol oil is respectively 30-40g/t, 35-45g/t and 10-15g/t, the dosage of the sodium sulfide, butyl xanthate and pinitol oil is respectively 10-20g/t, 10-20g/t and 5-10g/t, the dosage of the sodium sulfide, butyl xanthate and pinitol oil is respectively 5-15g/t, 5-15g/t and 5g/t in a coarse second and third stirring barrel, and the dosage of the sodium sulfide, butyl xanthate and pinitol oil is respectively 5-10g/t, 5-10g/t and 5g/t in a third stirring barrel.
The powder ore bin in the invention needs to be pretreated by the following steps before being loaded: step one: naturally slow cooling a hot slag ladle filled with smelting slag for 18 hours and 49 hours, spraying water, measuring the temperature, transferring the hot slag ladle with the temperature less than 60 ℃ in summer (the temperature less than 50 ℃ in winter) to a slag pouring port by a slag ladle truck, and pouring; step two: slag in the slag ladle is automatically crushed in a natural falling process, large slag is crushed to below 500mm by a movable breaking hammer, and the crushed slag is conveyed into a coarse crushing bin by combined operation of a loader and a dumper, wherein a 500mm grid is arranged at the upper part of the coarse crushing bin.
It should be noted that: the materials in the coarse crushing bin are fed into a jaw crusher through a heavy plate feeder to be crushed from 500mm to below 200mm, the crushed materials are conveyed to a powder bin through a rubber belt conveyor, the crushed materials are fed into a first rubber belt conveyor through the heavy plate feeder and are conveyed to a semi-autogenous mill for ore grinding, the ore grinding concentration is 75%, the materials on the screen are returned to the semi-autogenous mill through a second rubber belt conveyor and a third rubber belt conveyor after the discharged materials of the semi-autogenous mill are screened through a linear vibrating screen, closed-circuit ore grinding is formed, and the materials entering a first-stage ore grinding grading process are ensured to be primarily ground;
the material under the screen of the vibrating screen is pumped to a raw ore sampler by a semi-self-grinding discharge conveying slurry pump and then discharged into a first stage classification feed pump pool to be combined with ball milling discharge, the material in the first stage classification pump pool is pumped to a first stage classification cyclone by a first stage classification feed pump to carry out first stage classification, the first stage classification overflow self-flows into a coarse first stirring barrel to be stirred and then carries out coarse first operation to obtain final concentrate 1, the tailings of the coarse first stage self-flows into a second stage classification feed pump pool, the tailings of the coarse first stage self-flows into a second stage cyclone to carry out second stage classification by a second stage classification feed pump, the second stage classification overflow self-flows into a coarse second stirring barrel to be stirred and mixed with middling classification overflow uniformly, and then the coarse second and third scavenging is carried out, the coarse secondary concentrate is subjected to three-time concentration to obtain final concentrate 2, tailings after three-time scavenging are final tailings, primary and secondary classified sand setting are fed into a ball mill simultaneously, closed circuit grinding is formed, the concentration of the ball mill grinding is 80%, primary tailings and tertiary scavenging concentrate are combined and serve as middlings to enter a middling classification feed pump pool, middling classification pumping is carried out to a middling cyclone for classification, middling classified overflow returns to a coarse secondary stirring barrel, sand setting enters a vertical mill to form closed circuit grinding, middling classification regrinding is carried out on the primary tailings and the tertiary scavenging concentrate, so that copper content of the slag tailings is reduced, and copper recovery rate is improved.
Combining the rough primary concentrate 1 and the fine tertiary concentrate 2 as a final product, pumping the final product to a copper concentrate thickener through a copper concentrate conveying slag slurry pump, and concentrating and filtering to obtain a final concentrate;
and discharging the three-scavenging tailings as final tailings into a tailings pump pool, conveying the tailings to a tailings thickener through a slurry pump, and concentrating and filtering to produce slag tailings.
Example two
As shown in fig. 1, wherein the same or corresponding parts as those in embodiment one are designated by the corresponding reference numerals as those in embodiment one, only the points of distinction from embodiment one will be described below for the sake of brevity. The second embodiment is different from the first embodiment in that:
the process is applied to copper smelting slag beneficiation, and the properties of the slag are as follows: the slag is produced by smelting and dissolving copper concentrate in a flash furnace. The nature of the slag is related to the composition of the copper concentrate being charged into the furnace and the smelting operating conditions. The main components include copper sulfide, metallic copper, mixed matte, fayalite, spodumene, quartz, vitreous, etc. Slag components: 1.3% of Cu, 0.5% of S, 40% of Fe, 30% of SiO2 and 4.1% of CaO+MgO4.
Smelting slag of slag separation plant is in coarseCrushing to P80= -150mm, conveying the crushed slag to a powder ore bin for storage by a belt conveyor, conveying the slag in the powder ore bin to a semi-autogenous mill by a heavy plate feeder, grinding the slag by a first belt conveyor, sieving the slag by a linear vibrating screen until the fineness (-200 mesh content) of the semi-autogenous mill is about 40%, returning the oversize material to the semi-autogenous mill by a belt after sieving the slag by the linear vibrating screen, merging the undersize product and the material discharged by the ball mill, grading the undersize product by a first-stage grading cyclone, wherein the fineness (-200 mesh content) of the first-stage grading overflow is about 70%, and the concentration is 50%, wherein the first-stage overflow enters a coarse one (3 grooves 40 m) 3 Flotation machine), directly producing final copper slag concentrate product 1, carrying out two-stage classification on coarse-stage tailings, wherein the two-stage classification overflow fineness (-400 mesh content) is about 80%, the concentration is 35%, and the two-stage classification overflow passes through a coarse second (4 grooves 40 m) 3 Flotation machine) three times of scavenging (one scavenging 3 tank, two scavenging 2 tank, three scavenging 2 tank, all 40m 3 Flotation machine), the swept tailings are the final tailings, and the coarse and secondary concentrates are subjected to three times of concentration (a primary tank 3, a secondary tank 2 and a tertiary tank 2, which are 16m respectively) 3 A flotation machine) to produce a final copper slag concentrate product 2, combining the fine-tailings and the tertiary scavenging concentrate into middlings, returning the middlings to a middling classification cyclone and a vertical mill for closed circuit regrinding, wherein the middling classification overflow fineness (-600 mesh content) is more than 90%, the concentration is 22%, the coarse secondary concentration is about 33%, and the final concentrate products 1 and 2 are pumped into a concentrate thickener after being combined.
The flotation agents added into the coarse stirring barrel are sodium sulfide, butyl xanthate and pinitol oil, and the dosage of the flotation agents is 20-30g/t, 30-40g/t and 40-50g/t respectively.
The flotation agents added into the coarse stirring barrel II are sodium sulfide, butyl xanthate and pinitol oil, and the dosage of the flotation agents is 30-40g/t, 35-45g/t and 10-15g/t respectively.
The flotation agents added into the feeding groove are sodium sulfide, butyl xanthate and pinitol oil, and the dosage of the flotation agents is 10-20g/t, 10-20g/t and 5-10g/t respectively.
The flotation agents added into the second sweeping feed tank are sodium sulfide, butyl xanthate and pinitol oil, and the dosage of the flotation agents is 5-15g/t, 5-15g/t and 5g/t respectively.
The flotation agents added into the three-sweeping feed tank are sodium sulfide, butyl xanthate and pinitol oil, and the dosage of the flotation agents is 5-10g/t, 5-10g/t and 5g/t respectively.
Analysis table compared with traditional slag mineral processing technology index and power consumption
The copper grade of the raw ore of the selected slag is 1.3%, the copper grade of the final slag concentrate produced is 20%, the copper grade of the tailings is 0.23%, and the copper recovery rate is 83.27%. The process reduces the power consumption of slag beneficiation, reduces the tailing grade and improves the copper recovery rate in production.
Benefit analysis: estimated by annual treatment of 120 ten thousand tons of smelting slag
The recovery rate can be improved to bring benefit 1039 ten thousand yuan (120 x 1.3 x 1.48 x 4.5 x 1039 ten thousand yuan)
108 ten thousand yuan of electric power cost saving (120 x 1.5 x 0.6=108 ten thousand yuan)
The economic benefit is improved by about 1147 ten thousand yuan/year for the smelting plant.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The JXC beneficiation process for the copper smelting flash smelting slag is characterized by comprising the following steps of:
rough grinding procedure: slag in the powder ore bin is fed into a first rubber belt conveyor through a heavy plate feeder and is conveyed to a semi-automatic mill for ore grinding, discharge materials of the semi-automatic mill are screened through a linear vibrating screen, and materials on the screen are conveyed to the first belt through a second belt and a third belt and returned to the semi-automatic mill to form closed-circuit ore grinding;
a step of grinding, classifying and sorting: the materials screened by the linear vibrating screen are conveyed to a raw ore sampler through a semi-self-grinding discharge conveying slurry pump, raw ore class samples are taken and discharged into a stage-grading feeding pump pool to be combined with ball-milling discharge, the combined materials are conveyed to a stage-grading cyclone through a stage-grading feeding pump to carry out stage-grading operation, the stage-grading sand setting automatically flows into a ball mill to carry out ore grinding operation, the stage-grading overflow enters a coarse-flotation operation, and the obtained foam is final concentrate 1;
two-stage grinding classifying and sorting process: conveying the tailings subjected to rough first flotation into a second-stage classification cyclone by a second-stage classification feed pump to perform second-stage classification operation, enabling the second-stage classification sand to flow into a ball mill automatically to form closed-circuit grinding, enabling second-stage classification overflow and middling classification overflow to flow into a rough second stirring barrel automatically to be combined, performing rough second and third scavenging operation, and performing third concentration on concentrate subjected to rough second flotation to obtain final concentrate 2, wherein the tailings subjected to third scavenging are final tailings;
middling regrinding and classifying procedure: the tailings of the first refining, the concentrate subjected to three scavenging and the middling vertical mill discharge are combined in a middling pump pool, middling classification operation is carried out by feeding middling classification cyclone through middling classification feed pump, middling classification sand setting enters a vertical mill for regrinding, middling classification overflow returns to a coarse second stirring barrel and is combined with second-stage classification overflow to enter coarse second classification operation;
and (3) a step of dehydrating the tailings: the coarse first and fine third concentrates 1,2 are conveyed into a concentrate thickener for concentration through a concentrate conveying slurry pump, the concentrated concentrates are conveyed into a filter press for filtering and dewatering operation to obtain final concentrates, the three-swept tailings are conveyed into a tailings thickener for concentration through a tailings conveying pump, and the concentrated tailings are conveyed into a ceramic filter for filtering and dewatering operation to obtain slag tailings.
2. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 1, wherein:
after ore discharge of the semi-automatic mill in the rough grinding process is screened by a linear vibrating screen, oversize materials which do not pass through a screen plate of the vibrating screen are sent into the semi-automatic mill by a second rubber belt conveyor and a third rubber belt conveyor, so that closed-circuit ore grinding is formed.
3. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 1, wherein:
the main component of the concentrate obtained after the coarse operation in the primary grinding, classifying and sorting procedure is copper sulfide.
4. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 1, wherein:
the tailings after the second stage grading overflow flow through coarse second flotation and third scavenging in the second stage grinding grading separation procedure are final tailings, the tailings are conveyed to a tailings thickener by a tailings conveying slurry pump for concentration, the concentrated tailings are conveyed to a filter for filtering and dewatering operation to produce slag tailings, and the slag tailings can be sold as production raw materials of cement.
5. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 1, wherein:
the sand setting of the first-stage grinding classification and the second-stage grinding classification automatically flows into a ball mill, is further ground by the ball mill and then discharged to be combined with the materials discharged by a raw ore sampler, and is then pumped into a first-stage classification cyclone by a first-stage classification feeding pump to carry out classification operation.
6. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 5, wherein:
the grinding concentration of the ball mill is 80%, the first-stage graded overflow concentration is 45% -55%, the fineness is-200 meshes, the content is more than 70%, the second-stage graded overflow concentration is 30% -40%, the fineness is-400 meshes, the content is more than 80%, the middling graded overflow concentration is 18% -25%, and the fineness is-600 meshes, and the content is more than 90%.
7. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 1, wherein:
the middlings are a mixture of the primary tailings and the tertiary scavenging concentrate.
8. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 1, wherein:
the middling classifying cyclone in the middling regrinding classifying procedure carries out classifying operation on middlings, the continuously living target minerals with larger granularity in the middlings automatically flow into the middling vertical mill in a sand setting mode to carry out regrinding, the well-ground middlings are discharged into a middling pump pool to be combined with the concentrate and refined tailings which are subjected to tertiary scavenging, and the middling classified minerals are sent into the middling classifying cyclone again through a middling classifying feed pump to carry out classifying operation, so that closed circuit grinding classification is formed.
9. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 1, wherein:
the size of the discharge grid plate of the semi-autogenous mill in the rough grinding process is 45mm, the mesh size of the linear vibrating screen is 8mm 29mm, and the concentration of semi-autogenous grinding is 75%.
10. The JXC beneficiation process of copper smelting flash smelting slag in accordance with claim 1, wherein:
sodium sulfide, butyl xanthate and pinitol oil are added into a coarse first stirring barrel corresponding to coarse first flotation, the dosages of the sodium sulfide, the butyl xanthate and the pinitol oil are respectively 20-30g/t, 30-40g/t and 40-50g/t, sodium sulfide, butyl xanthate and pinitol oil are respectively 30-40g/t, 35-45g/t and 10-15g/t, sodium sulfide, butyl xanthate and pinitol oil are respectively added into a first feeding groove, 10-20g/t and 5-10g/t, sodium sulfide, butyl xanthate and pinitol oil are respectively added into a second feeding groove, 5-15g/t and 5g/t, and sodium sulfide, butyl xanthate and pinitol oil are respectively added into a third feeding groove, and the dosages of the sodium sulfide, the butyl xanthate and the pinitol oil are respectively 5-10g/t, 5-10g/t and 5g/t.
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