CN113492055A - Mineral processing technology for treating copper-containing pyrite - Google Patents
Mineral processing technology for treating copper-containing pyrite Download PDFInfo
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- CN113492055A CN113492055A CN202010254710.2A CN202010254710A CN113492055A CN 113492055 A CN113492055 A CN 113492055A CN 202010254710 A CN202010254710 A CN 202010254710A CN 113492055 A CN113492055 A CN 113492055A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 100
- 239000010949 copper Substances 0.000 title claims abstract description 100
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 229910052683 pyrite Inorganic materials 0.000 title claims abstract description 73
- 239000011028 pyrite Substances 0.000 title claims abstract description 73
- 229910052500 inorganic mineral Inorganic materials 0.000 title abstract description 20
- 239000011707 mineral Substances 0.000 title abstract description 20
- 238000012545 processing Methods 0.000 title abstract description 6
- 238000005516 engineering process Methods 0.000 title abstract description 4
- 239000012141 concentrate Substances 0.000 claims abstract description 196
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 151
- 239000011593 sulfur Substances 0.000 claims abstract description 151
- 230000002000 scavenging effect Effects 0.000 claims abstract description 149
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 143
- 238000005188 flotation Methods 0.000 claims abstract description 106
- 238000000926 separation method Methods 0.000 claims abstract description 75
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 239000004576 sand Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 51
- 230000008569 process Effects 0.000 claims description 48
- 238000000227 grinding Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 7
- 230000008719 thickening Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 239000002516 radical scavenger Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 23
- 229910052951 chalcopyrite Inorganic materials 0.000 description 19
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 19
- 238000011084 recovery Methods 0.000 description 13
- 239000003112 inhibitor Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 10
- 230000008901 benefit Effects 0.000 description 9
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- 230000009467 reduction Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 description 2
- HQABUPZFAYXKJW-UHFFFAOYSA-O butylazanium Chemical compound CCCC[NH3+] HQABUPZFAYXKJW-UHFFFAOYSA-O 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910001779 copper mineral Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 238000003912 environmental pollution Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 239000003002 pH adjusting agent Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- -1 sulfur metals Chemical class 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- INLYYXLPQFTQLY-UHFFFAOYSA-N 2-[3-[(4-amino-2-ethylpyrimidin-5-yl)methyl]-4-methyl-1,3-thiazol-3-ium-5-yl]ethanol Chemical compound NC1=NC(CC)=NC=C1C[N+]1=CSC(CCO)=C1C INLYYXLPQFTQLY-UHFFFAOYSA-N 0.000 description 1
- JZRWCGZRTZMZEH-UHFFFAOYSA-N Thiamine Natural products CC1=C(CCO)SC=[N+]1CC1=CN=C(C)N=C1N JZRWCGZRTZMZEH-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
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- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- BWFPGXWASODCHM-UHFFFAOYSA-N copper monosulfide Chemical compound [Cu]=S BWFPGXWASODCHM-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
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- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- 210000003574 melanophore Anatomy 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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Images
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
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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Abstract
The invention discloses a mineral processing technology for treating copper-containing pyrite, which comprises the following steps: roughly selecting one overflow ore pulp after classification; performing secondary roughing on the tailing pulp of the primary roughing; grading the second rough concentration ore pulp; regrinding the settled sand, combining ore discharge and rough concentration ore pulp and grading; separating and roughing the second concentrate graded overflow pulp; combining the concentrate pulp of the first roughing step and the concentrate pulp of the second separating roughing step, and performing first flotation column concentration and second flotation column concentration; carrying out first separation scavenging and second separation scavenging on the separated rougher tailing pulp; returning the separation scavenging first concentrate pulp and the flotation column fine concentration first tailing pulp to the grading position of the rough concentration second concentrate pulp; returning the ore pulp of the second separated scavenging tailings to the second roughing position of the ore pulp of the first roughing tailings; performing first scavenging and second scavenging on the tailing pulp of the second roughing; and (3) desliming the tailing slurry of the second scavenging, and performing sulfur roughing, sulfur scavenging, first sulfur concentration and second sulfur concentration on the settled sand.
Description
Technical Field
The invention relates to the technical field of mineral processing, in particular to a mineral separation process for treating copper-containing pyrite.
Background
In the related technology, the copper-containing pyrite beneficiation process mostly adopts a copper-sulfur mixed flotation-copper-sulfur separation process, namely, a process flow of separating the chalcopyrite and the pyrite together and then separating the chalcopyrite and the pyrite. The process flow generally has the problems of low grade of copper concentrate and sulfur concentrate, low recovery rate, relatively serious mutual content of the two concentrates and the like; in addition, in the actual production process of ore dressing, in order to simultaneously consider the grades and the recovery rates of copper and sulfur concentrates, the field process control difficulty is higher, so that the tailings contain high copper and sulfur, the loss of copper and sulfur metals is more serious, precious mineral resources are wasted, and the economic benefit of enterprises is lower; in addition, the high sulfur content in the tailing pulp can cause the water quality in a tailing pond to be acidic and influence the environment.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the beneficiation process for treating the copper-containing pyrite, and the beneficiation process for treating the copper-containing pyrite has the advantages of stable and reliable flow, easiness in operation, environmental friendliness, high economic benefit and the like.
The beneficiation process for treating the copper-containing pyrite according to the embodiment of the invention comprises the following steps:
carrying out coarse crushing, intermediate ore stacking, ore grinding and grading operations on the copper-containing pyrite;
performing a first roughing operation on the classified raw ore pulp to obtain a first roughing concentrate pulp and a first roughing tailing pulp;
performing a second roughing operation on the first roughing tailing pulp to obtain a second roughing concentrate pulp and a second roughing tailing pulp;
grading the second rougher concentrate pulp to obtain second rougher concentrate graded overflow pulp and second rougher concentrate graded settled sand;
regrinding the classified settled sand of the second roughing concentrate, combining ore discharge and the ore pulp of the second roughing concentrate for classification to form a regrinding closed circuit;
separating and roughing the second roughed concentrate graded overflow pulp to obtain separated roughed concentrate pulp and separated roughed tailing pulp;
combining the rougher flotation first concentrate pulp and the separated rougher flotation concentrate pulp, and performing flotation column first concentration and flotation column second concentration to obtain copper concentrate pulp and flotation column first concentration tailing pulp;
carrying out thickening and filter pressing treatment on the copper concentrate ore pulp to obtain copper concentrate;
carrying out first separation scavenging and second separation scavenging on the separated roughing tailing pulp to obtain first separation scavenging concentrate pulp and second separation scavenging tailing pulp;
returning the separation scavenger first concentrate slurry and the flotation column concentration first tailings slurry to a classification stage of the rougher second concentrate slurry to participate in the regrinding closed circuit;
returning the separation scavenging second tailing pulp to a second roughing operation part of the first roughing tailing pulp to form a roughing closed circuit;
performing scavenging one and scavenging two operations on the roughing second tailing pulp to obtain scavenging second tailing pulp;
desliming the second scavenged tailing pulp, forming deslimed overflow pulp into final tailings, and stirring deslimed settled sand, and then performing first sulfur roughing, sulfur scavenging, first sulfur concentration and second sulfur concentration to obtain second sulfur concentration flotation concentrate pulp and final tailings;
and carrying out thickening and filtering treatment on the sulfur concentration secondary flotation concentrate pulp to obtain sulfur concentrate.
According to the beneficiation process for treating the copper-containing pyrite, the copper is preferentially selected for flotation, the copper-selected tailings are subjected to graded desliming and then sulfur separation, the process flow structure is clear, the operation control in actual production is easy, and the beneficiation process has the advantages of stable and reliable flow, short construction period, few production links, reduction of environmental pollution, easiness in production management and automation, reduction of labor intensity of workers and the like; the method can recover the resources of the chalcopyrite and the pyrite as much as possible, is beneficial to improving the economic benefit of enterprises, and simultaneously reduces the influence of sulfur in tailings on the environment; the method has reference and reference significance for the design and the transformation of the mineral processing process flow of the mine similar to the copper-containing pyrite.
In addition, the beneficiation process for treating the copper-containing pyrite according to the embodiment of the present invention has the following additional technical features:
according to some embodiments of the invention, combining the rougher concentrate slurry with the separated rougher concentrate slurry for a first flotation column cleaner and a second flotation column cleaner includes:
combining the rougher concentrate pulp with the separated rougher concentrate pulp for flotation column concentration to obtain a flotation column concentrate pulp and a flotation column concentrate tailing pulp;
and performing two operations of flotation column concentration on the first concentrate pulp of the flotation column to obtain second concentrate pulp of the flotation column concentration and second tailing pulp of the flotation column concentration, wherein the second concentrate pulp of the flotation column concentration is the copper concentrate pulp.
In some embodiments of the invention, the beneficiation process to treat copper-containing pyrite further comprises:
and returning the second tailing pulp of the flotation column concentration to the first rougher concentrate pulp and the flotation column concentration position for separating the rougher concentrate pulp to form a flotation column concentration closed circuit.
According to some embodiments of the invention, the first separation and scavenging operation and the second separation and scavenging operation are performed on the separated rougher tailing pulp, and the first separation and scavenging operation and the second separation and scavenging operation comprise:
performing a separation scavenging operation on the separation rougher tailings slurry to obtain the separation scavenging concentrate slurry and the separation scavenging tailings slurry;
and carrying out separation and scavenging operation on the separation and scavenging ore pulp to obtain separation and scavenging ore pulp and separation and scavenging ore pulp.
In some embodiments of the invention, the beneficiation process to treat copper-containing pyrite further comprises:
and returning the separation scavenging second concentrate pulp to the separation scavenging first operation part of the separation roughing tailing pulp to form a separation scavenging closed circuit.
According to some embodiments of the invention, the first scavenging and the second scavenging are performed on the second rougher tailing pulp, and the first scavenging and the second scavenging comprise:
performing scavenging one operation on the second roughing tailing pulp to obtain a scavenging one concentrate pulp and a scavenging one tailing pulp;
and carrying out scavenging two operation on the scavenging one-tailing pulp to obtain scavenging two concentrate pulp and the scavenging two-tailing pulp.
In some embodiments of the invention, the beneficiation process to treat copper-containing pyrite further comprises:
and returning the scavenging first concentrate pulp to a roughing second operation part of the roughing first tailing pulp to form a scavenging first closed circuit.
In some embodiments of the invention, the beneficiation process to treat copper-containing pyrite further comprises:
and returning the second scavenging concentrate ore pulp to the first scavenging operation of the second roughing tailing ore pulp to form a second scavenging closed circuit.
According to some embodiments of the invention, the deslimed sand is stirred and then subjected to sulfur roughing, sulfur scavenging, first sulfur concentration, and second sulfur concentration operations comprising:
performing sulfur roughing operation on the stirred deslimed settled sand to obtain sulfur roughing concentrate ore pulp and sulfur roughing tailing ore pulp;
carrying out sulfur concentration operation on the sulfur roughing concentrate ore pulp to obtain sulfur concentration-concentrate ore pulp and sulfur concentration-tailing ore pulp;
performing a second sulfur concentration operation on the first sulfur concentration concentrate pulp to obtain a second sulfur concentration concentrate pulp and a second sulfur concentration tailing pulp, wherein the second sulfur concentration concentrate pulp is the second sulfur concentration flotation concentrate pulp;
and carrying out sulfur scavenging operation on the sulfur roughing tailing pulp to obtain sulfur scavenging concentrate pulp and sulfur scavenging tailing pulp, wherein the sulfur scavenging tailing pulp is the final tailing.
In some embodiments of the invention, the beneficiation process to treat copper-containing pyrite further comprises:
returning the sulfur concentration-tailings slurry and the sulfur scavenger concentrate slurry to a sulfur roughing operation of the deslimed grit to form a sulfur roughing closed loop.
In some embodiments of the invention, the beneficiation process to treat copper-containing pyrite further comprises:
and returning the sulfur concentration secondary tailing pulp to a sulfur concentration one-operation of the sulfur roughing concentrate pulp to form a sulfur concentration closed loop.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic diagram of a beneficiation process to treat copper-containing pyrite, according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A beneficiation process to treat copper-containing pyrite according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, a beneficiation process for treating copper-containing pyrite according to an embodiment of the present invention, includes:
carrying out coarse crushing, intermediate ore stacking, ore grinding and grading operation on the copper-containing pyrite:
carrying out coarse crushing operation on copper-containing pyrite raw ore (the copper-containing grade is 0.62 percent, and the sulfur-containing grade is 13.40 percent) with the granularity of less than 500mm to obtain ore with the granularity of less than 250 mm;
feeding ores with the granularity of less than 250mm into an intermediate ore pile buffer memory to ensure continuous feeding of subsequent ore grinding;
feeding the ore of the intermediate ore pile and a pH regulator into a semi-automatic mill for semi-automatic grinding, adjusting the pH value of ore pulp to about 12, feeding the material on an ore discharge screen of the semi-automatic mill into a hard rock crusher for crushing, returning the crushed material to the semi-automatic mill, classifying the material under the ore discharge screen of the semi-automatic mill, wherein the classified overflow is raw ore pulp with the granularity of less than 0.074mm accounting for 70%, feeding the classified sand into a ball mill for grinding, combining the ore discharge and the ore discharge screen ore pulp of the semi-automatic mill for classification, and forming an ore grinding closed circuit.
Adding a collecting agent and a foaming agent into raw ore pulp with the granularity of less than 0.074mm accounting for 70%, and stirring and then carrying out primary roughing operation to obtain primary roughing concentrate ore pulp and primary roughing tailing ore pulp. Here, the amount of the collector added was 28g and the amount of the frother added was 22g based on 1 ton of the copper-containing pyrite.
And adding a collecting agent and a foaming agent into the first rougher tailing pulp, and performing second rougher flotation to obtain second rougher concentrate pulp and second rougher tailing pulp. Here, the amount of the collector added was 7g and the amount of the frother added was 4g based on 1 ton of the copper-containing pyrite.
And classifying the second rougher concentrate ore pulp to obtain second rougher concentrate classifying overflow ore pulp (the granularity is less than 0.045mm and accounts for 85 percent) and second rougher concentrate classifying settled sand.
And regrinding the classified settled sand of the second rougher concentrate by using a vertical mill, combining ore discharge and the pulp of the second rougher concentrate for classification, and forming a regrinding closed circuit.
Adding an inhibitor and a collecting agent into the secondary rougher concentrate graded overflow pulp for stirring, and separating and rougher dressing the stirred secondary rougher concentrate graded pulp to obtain separated rougher concentrate pulp and separated rougher tailing pulp. Here, the addition amount of the inhibitor was 1000g and the addition amount of the collector was 4g based on 1 ton of the copper-containing pyrite.
The roughing-concentrate ore pulp and the separated roughing-concentrate ore pulp are combined, and a first flotation column concentration operation and a second flotation column concentration operation are carried out to obtain copper concentrate ore pulp (copper-containing grade is 20 percent, recovery rate is 80 percent) and first tailing ore pulp of the flotation column concentration. For example, the concentration operation employs a flotation column as the flotation device.
The copper concentrate pulp is subjected to thickening and filter pressing treatment to obtain copper concentrate (with the water content of 10%). For example, copper concentrate pulp is pressure filtered using a horizontal filter press.
And carrying out first separation scavenging and second separation scavenging on the separated roughing tailing pulp to obtain first separation scavenging concentrate pulp and second separation scavenging tailing pulp.
And returning the separation scavenging first concentrate ore pulp and the flotation column fine concentration first tailing ore pulp to the classification stage of the rough concentration second concentrate ore pulp to participate in a regrinding closed circuit, and recovering chalcopyrite in the ore pulp as much as possible.
And returning the ore pulp of the second separated scavenging tailings to the second roughing operation of the ore pulp of the first roughing tailings to form a closed roughing circuit, and recovering chalcopyrite in the ore pulp as much as possible.
And adding a collecting agent and a foaming agent into the second roughing tailing pulp, and performing first scavenging and second scavenging to obtain the second scavenging tailing pulp. Here, the amount of the collector added was 11g and the amount of the frother added was 4g based on 1 ton of the copper-containing pyrite.
And (3) carrying out classification and desliming on the ore pulp of the second scavenged tailings by adopting a hydrocyclone group, wherein the desliming overflow ore pulp forms final tailings so as to reduce the use amount of a subsequent pH regulator. Adding a pH regulator, a collecting agent and a foaming agent into the deslimed settled sand, stirring, and then performing sulfur roughing, sulfur scavenging, sulfur concentration I and sulfur concentration II to obtain sulfur concentration II flotation concentrate ore pulp (containing 46% of sulfur and having a recovery rate of 75%) and final tailings. Here, the added amount of the pH adjusting agent added to the deslimed settled sand was 2000g, the pH of the slurry was adjusted to 7-8, the added amount of the collecting agent was 140g, and the added amount of the foaming agent was 28g, based on 1 ton of the copper-containing pyrite.
And (4) thickening and filtering the ore pulp of the second concentrate of the sulfur concentration to obtain sulfur concentrate (with the water content of 10%). For example, a ceramic filter is used to filter the sulfur concentration flotation slurry.
According to the beneficiation process for treating the copper-containing pyrite, the flotation adopts the preferential copper flotation, the copper-flotation tailings are subjected to classification and desliming and then sulfur separation, namely, the copper-containing pyrite is processed by coarse crushing → semi-autogenous grinding → ball milling → obstinate stone crushing → copper selection with priority twice rough concentration and twice scavenging → two concentrate ore pulp regrinding of rough concentration → separation and rough scavenging → two copper selection → copper tailings classification and desliming → sulfur selection and rough scavenging → two sulfur selection → concentrate thickening → filtration, the process flow has clear structure, is easy to operate and control in actual production, and has the advantages of stable and reliable flow, short construction period, less production links, environmental pollution reduction, easy production management and automation, labor intensity reduction of workers and the like, for example, by adopting the process to treat the copper-containing pyrite, copper concentrate with 20% of copper and 80% of recovery rate and high-sulfur concentrate with 46% of sulfur and 75% of recovery rate can be obtained, and the problem of difficult separation of the copper-containing pyrite is solved. In addition, the process can recover the resources of the chalcopyrite and the pyrite as much as possible, is beneficial to improving the economic benefit of enterprises, and simultaneously reduces the influence of sulfur in tailings on the environment; the method has reference and reference significance for the design and the transformation of the mineral processing process flow of the mine similar to the copper-containing pyrite.
According to some embodiments of the present invention, as shown in figure 1, the first concentrate slurry from the rougher flotation is combined with the separated rougher concentrate slurry to perform a first column concentration operation and a second column concentration operation, including:
combining the rougher flotation concentrate pulp with the separated rougher flotation concentrate pulp, and performing flotation column cleaning operation to obtain column cleaning concentrate pulp and flotation column cleaning tailing pulp;
and performing two operations of flotation column concentration on the first concentrate pulp of the flotation column to obtain second concentrate pulp of the flotation column concentration and second tailing pulp of the flotation column concentration, wherein the second concentrate pulp of the flotation column concentration is copper concentrate pulp.
In some embodiments of the present invention, as shown in fig. 1, the beneficiation process of treating copper-bearing pyrite further comprises:
returning the second tailing pulp of the flotation column concentration to the first rough concentration ore pulp and the first rough concentration ore pulp separation flotation column concentration position to form a flotation column concentration closed circuit.
According to some embodiments of the invention, as shown in fig. 1, the first separation and scavenging and the second separation and scavenging operations are performed on the separated rougher tailing pulp, and the first separation and scavenging and the second separation and scavenging operations comprise:
carrying out separation scavenging one operation on the separated rougher tailing pulp to obtain separated scavenging one concentrate pulp and separated scavenging one tailing pulp;
and carrying out separation and scavenging operation on the separation and scavenging ore pulp to obtain separation and scavenging ore pulp and separation and scavenging ore pulp.
In some embodiments of the present invention, as shown in fig. 1, the beneficiation process of treating copper-bearing pyrite further comprises:
and returning the ore pulp of the second separation scavenging concentrate to the first separation scavenging operation for separating the ore pulp of the roughing tailings to form a closed separation scavenging circuit.
According to some embodiments of the present invention, as shown in fig. 1, the first scavenging and the second scavenging are performed on the second rougher tailing pulp, including:
performing scavenging one operation on the roughing second tailing pulp to obtain scavenging one concentrate pulp and scavenging one tailing pulp;
and carrying out scavenging two operation on the scavenging one-tailing pulp to obtain scavenging two concentrate pulp and scavenging two-tailing pulp.
In some embodiments of the present invention, as shown in fig. 1, the beneficiation process of treating copper-bearing pyrite further comprises:
returning the scavenging first concentrate ore pulp to a roughing second operation part of the roughing first tailing ore pulp to form a scavenging first closed circuit;
and returning the scavenging second concentrate ore pulp to the scavenging first operation position of the roughing second tailing ore pulp to form a scavenging second closed circuit. The scavenger concentrates are returned sequentially to recover as much chalcopyrite in the pulp as possible.
According to some embodiments of the invention, as shown in FIG. 1, the deslimed sand is stirred and then subjected to sulfur roughing, sulfur scavenging, first sulfur concentration, and second sulfur concentration operations, comprising:
carrying out sulfur roughing operation on the stirred deslimed settled sand to obtain sulfur roughing concentrate ore pulp and sulfur roughing tailing ore pulp;
carrying out sulfur concentration operation on the sulfur roughing concentrate ore pulp to obtain sulfur concentration-concentrate ore pulp and sulfur concentration-tailing ore pulp;
carrying out sulfur concentration two-operation on the sulfur concentration one-ore concentrate pulp to obtain sulfur concentration two-ore concentrate pulp and sulfur concentration two-tailing pulp, wherein the sulfur concentration two-ore concentrate pulp is the sulfur concentration two-flotation ore concentrate pulp;
and carrying out sulfur scavenging operation on the sulfur roughing tailing pulp to obtain sulfur scavenging concentrate pulp and sulfur scavenging tailing pulp, wherein the sulfur scavenging tailing pulp is the final tailing.
In some embodiments of the present invention, as shown in fig. 1, the beneficiation process of treating copper-bearing pyrite further comprises:
and returning the sulfur concentration-tailing slurry and the sulfur scavenging concentrate slurry to a sulfur roughing operation of deslimed settled sand to form a sulfur roughing closed circuit, and recovering pyrite in the slurry as much as possible.
In some embodiments of the present invention, as shown in fig. 1, the beneficiation process of treating copper-containing pyrite further comprises:
and returning the second tailing pulp of the sulfur concentration to the first sulfur concentration operation of the concentrate pulp of the sulfur roughing to form a closed sulfur concentration loop.
Specifically, the crushing process flow of the invention comprises coarse crushing, semi-autogenous grinding, ball milling and hard stone crushing. In the step, the copper-containing pyrite raw ore is subjected to coarse crushing, semi-autogenous grinding, ball milling and hard stone crushing so as to obtain raw ore pulp with the granularity of less than 0.074mm accounting for 70%, and the requirement of subsequent flotation on the size fraction of the ore pulp can be met. The inventor researches and discovers that when the particle size of ore pulp is less than 0.074mm and accounts for 70%, the monomer dissociation degree of copper minerals is 65.23%, and the monomer dissociation degree of pyrite is 88.73%; when the particle size of the ore pulp is less than 0.074mm and accounts for 80 percent, the dissociation degree of copper minerals such as chalcopyrite and the like is improved, but the improvement range is not large, and is 72.23 percent, and the dissociation degree of the chalcopyrite reaches 93.07 percent. Therefore, monomer dissociation can be easily realized for most of pyrites in the raw ore during ore grinding, and the effect of further reducing the particle size and increasing the proportion on improving the concentrate grade is lower on the basis of the particle size and the proportion. Therefore, the power consumption required by the grinding flotation is the lowest by adopting the particle size and the proportion.
In the process flow of the preferential copper separation, the copper-containing pyrite raw ore pulp with the granularity of less than 0.074mm accounting for 70 percent is subjected to two times of roughing and two times of scavenging so as to obtain the roughing first concentrate ore pulp, the roughing second concentrate ore pulp and the scavenging second tailing ore pulp. Specifically, the raw ore pulp is added with a collecting agent and a foaming agent and then stirred for 5 minutes, and under the action of the collecting agent and the foaming agent, the chalcopyrite subjected to monomer dissociation in the raw ore pulp can be floated to obtain rough concentration ore pulp and rough concentration tailing ore pulp. The inventor finds that the collecting agent can be effectively adsorbed on the surface of the chalcopyrite ore and floats upwards along with bubbles through air flotation.
According to one embodiment of the present invention, the collector may be at least one selected from the group consisting of propylethanethiamine (Z-200), ethylthiamine, and butylammonium black. The collecting agent, particularly the propyl ethyl thiamine (Z-200), is low in price, easy to obtain and low in using amount, can be effectively adsorbed on the surface of chalcopyrite ore, and floats with bubbles through air flotation.
When the addition amount of the collecting agent is too much, the gangue minerals are mixed together and float upwards due to too much floating objects, so that the grade of the rough concentration ore pulp is influenced; when the addition amount of the collecting agent is too small, the floating amount of the chalcopyrite mineral is small, and the recovery rate of the copper concentrate is also influenced. To this end, according to yet another embodiment of the present invention, the amount of collector added for the rougher-flotation process was 28g based on 1 ton of pyrite containing copper.
According to another embodiment of the invention, after the collecting agent and the foaming agent are added into the rougher first tailing pulp, the intergrowth of the chalcopyrite in the rougher first tailing pulp can be floated under the action of the collecting agent and the foaming agent, so as to obtain rougher second concentrate pulp and rougher second tailing pulp. The collector can be effectively adsorbed on the surface of the intergrowth mineral of the chalcopyrite, and the chalcopyrite floats upwards along with bubbles through air flotation.
Similarly, when the addition amount of the collecting agent is too much, the floating objects are too much, so that gangue minerals are mixed together and float upwards, and the grade of the second rough concentration ore pulp is influenced; when the addition amount of the collecting agent is too small, the floating amount of the chalcopyrite mineral is small, and the recovery rate of the copper concentrate is also influenced. To this end, according to yet another embodiment of the present invention, the collector was added in an amount of 7g for the second flotation operation based on 1 ton of copper-containing pyrite.
According to another embodiment of the invention, the regrinding and classifying overflow of the rougher flotation two-concentrate ore pulp is ore pulp with the granularity of less than 0.045mm accounting for 85%, and the requirement of subsequent flotation on the size fraction of the ore pulp can be met. The inventor finds through a great deal of practice that on the basis of the particle size and the proportion, the effect of further reducing the particle size and increasing the proportion on improving the grade of the copper concentrate is lower, and the power consumption required by grinding and flotation by adopting the particle size and the proportion is the lowest.
According to another embodiment of the invention, the rougher concentrate pulp with the granularity less than 0.045mm accounting for 85% is subjected to one-time separation rougher flotation and two-time scavenging operation, so as to obtain separated rougher concentrate pulp and scavenged two-tailing pulp. Specifically, the inhibitor and the collecting agent are added into the rougher flotation second concentrate ore pulp and then stirred for 5 minutes, and under the action of the inhibitor and the collecting agent, the chalcopyrite subjected to monomer dissociation in the rougher flotation second concentrate ore pulp can be floated, so that separated rougher flotation concentrate ore pulp and separated rougher flotation tailing ore pulp are obtained.
Wherein, the inhibitor can generate a hydrophilic ferric hydroxide film on the surface of the pyrite mineral, and increases the wettability of the pyrite mineral surface to play a role in preparation. The inhibitor is selected from lime, NaOH solution, Na2SO3At least one of the solutions. The inhibitors used in this application, particularly lime, are inexpensive and readily available, primarily due to OH-and Ca produced by the hydrolysis of lime2+OH-and Fe on the surface of pyrite for inhibiting effect2+By action forming sparingly soluble and hydrophilic ferrous hydroxide [ Fe (OH) ]2]And iron hydroxide [ Fe (OH) ]3]Film, the pyrite is restrained. Inhibiting effects of Ca in addition to OH-)2+Also of influence, with hydrophilic Ca (OH)2Colloidal particles exist, prevent the collector from contacting with the surface of the pyrite, and have hydrophilicity.
The inventor finds that when the addition amount of the inhibitor is too large, the floating object is too small, so that the chalcopyrite intergrowth dissociated by the monomer floats less, and the recovery rate of separating the rougher concentrate ore pulp is influenced; when the addition amount of the inhibitor is too small, the floating amount of the pyrite mineral is large, and the grade of the ore pulp of the separated rough concentration is also influenced. To this end, according to a further embodiment of the invention, the inhibitor is added in an amount of 1000g for the rougher flotation operation based on 1 ton of copper-bearing pyrite.
According to another embodiment of the invention, the copper concentration operation adopts the flotation column as the flotation equipment, so that the concentration times can be reduced compared with a flotation machine, the flotation time can be increased, the concentrate recovery rate can be improved while the concentrate grade is ensured, and therefore, the flotation column equipment is adopted in the copper concentration flotation operation.
For the sulfur selecting process flow, in the step, a hydrocyclone group is adopted to carry out classification and desliming on the copper selecting scavenging secondary tailing slurry so as to obtain the classification sand settling slurry for sulfur selecting coarse scavenging flotation operation. Specifically, the graded grit pulp is added with a pH regulator and then stirred for 5 minutes, then a collecting agent is added and then stirred for 5 minutes, and pyrite in the raw ore pulp can be floated under the action of the collecting agent to obtain sulfur roughing concentrate and sulfur roughing tailings.
According to an embodiment of the present invention, the pH adjuster may be at least one selected from the group consisting of 98% concentrated sulfuric acid, hydrochloric acid, and dilute sulfuric acid. The pH regulator, especially 98% concentrated sulfuric acid, can effectively increase the pH value of ore pulp to 7-8, form conditions favorable for the action of other flotation reagents, improve the surface condition of minerals and the ion composition of the ore pulp, and has the advantages of low price, direct addition, easy acquisition and small using amount.
According to yet another embodiment of the present invention, the collector may be at least one selected from the group consisting of ethylxanthate, butylxanthate, butylammonium melanophore. The collecting agent, especially butyl xanthate, that this application adopted, its easy acquisition and quantity is few, and it can adsorb on the pyrite mineral surface effectively, makes it along with the bubble come-up through the flotation of aerifing.
When the addition amount of the collecting agent is too much, the amount of floating objects is too much, so that gangue minerals are mixed together and float upwards, and the grade of sulfur concentrate is influenced; when the addition amount of the collecting agent is too small, the floating amount of pyrite minerals is small, and the recovery rate of sulfur concentrate is influenced. To this end, according to a further embodiment of the present invention, the amount of collector added for the sulfur rougher flotation is 140g based on 1 ton of copper-containing pyrite.
In the concentrate dewatering process, the concentrate pulp is thickened and filtered so as to obtain thickened water and concentrate. Specifically, a horizontal filter press is adopted for copper concentrate, a ceramic filter is adopted for sulfur concentrate, and the water content of the obtained concentrate is 10%.
A beneficiation process to treat copper-containing pyrite according to an embodiment of the present invention is described in detail below.
Coarsely crushing copper-containing pyrite raw ore with copper content of 0.62%, sulfur content of 13.40% and particle size of less than 500mm to granularity of less than 250mm, conveying the raw ore to an intermediate ore pile, feeding the raw ore into a semi-autogenous mill together with a pH regulator through a belt at the bottom of the intermediate ore pile, adjusting the pH value of ore pulp to 12, feeding ore discharge of the semi-autogenous mill into a linear vibrating screen, feeding stubborn stones on the screen through the belt for crushing, returning the crushed materials to an ore feeding belt of the semi-autogenous mill after crushing, and feeding the crushed materials into an ore feeding end of the semi-autogenous mill; the materials under the screen of the linear vibrating screen enter a pump pool, settled sand enters an overflow type ball mill after being classified by a hydraulic cyclone group, ore discharge of the ball mill and the materials under the screen are combined and enter the same pump pool, and the hydraulic cyclone group and the ball mill form an ore grinding closed circuit.
The overflow of the hydrocyclone group is ore pulp with the granularity of less than 0.074mm accounting for 70 percent, copper selecting two rough and two-sweep flotation operation is carried out after adding chemicals and stirring, wherein the ore pulp of the first rough concentrate enters a flotation column for fine selection, the ore pulp of the second rough concentrate enters a regrinding pump pond and is pumped to a regrinding hydrocyclone group for classification, and settled sand enters a vertical mill. And the overflow is ore pulp with the granularity of less than 0.045mm accounting for 85%, the ore pulp enters separation rough scavenging operation after being added with chemicals and stirred, the separation rough concentrate ore pulp is combined with the ore pulp of the first rough concentrate, and copper concentrate with 20% of copper and 80% of recovery rate is obtained through twice flotation column concentration operation. The flotation column combines the first tailing pulp of fine concentration and the first concentrate pulp of separation scavenging and returns to the regrinding pump pool, and the second tailing pulp of separation scavenging returns to the second feeding of rough concentration.
And feeding the ore pulp of the second tailing of copper dressing scavenging into a classification desliming pump pool, pumping the ore pulp to a desliming hydraulic cyclone group for classification, overflowing the ore pulp to serve as final tailings, adjusting the pH value of the ore pulp to 7-8, adding medicines, stirring, performing sulfur dressing rough scavenging operation, and performing sulfur dressing first flotation operation and sulfur dressing second flotation operation on the ore pulp of the sulfur rough dressing concentrate to obtain high-sulfur concentrate and low-sulfur tailings with the sulfur content of 46% and the recovery rate of 75%. And (3) concentrating the copper concentrate and the high-sulfur concentrate, filtering, dehydrating the copper concentrate and the high-sulfur concentrate respectively to obtain copper concentrate and high-sulfur concentrate products with water contents of 10%, feeding the tailings into a tailing thickener, and pumping the thickened tailings to a tailing pond.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. The first feature being "on," "over" and "above" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "a specific embodiment," "an example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A beneficiation process for treating copper-containing pyrite, characterized by comprising:
carrying out coarse crushing, intermediate ore stacking, ore grinding and grading operations on the copper-containing pyrite;
performing a first roughing operation on the classified raw ore pulp to obtain a first roughing concentrate pulp and a first roughing tailing pulp;
performing a second roughing operation on the first roughing tailing pulp to obtain a second roughing concentrate pulp and a second roughing tailing pulp;
grading the second rougher concentrate pulp to obtain second rougher concentrate graded overflow pulp and second rougher concentrate graded settled sand;
regrinding the classified settled sand of the second roughing concentrate, combining ore discharge and the ore pulp of the second roughing concentrate for classification to form a regrinding closed circuit;
separating and roughing the second roughed concentrate graded overflow pulp to obtain separated roughed concentrate pulp and separated roughed tailing pulp;
combining the rougher flotation first concentrate pulp and the separated rougher flotation concentrate pulp, and performing flotation column first concentration and flotation column second concentration to obtain copper concentrate pulp and flotation column first concentration tailing pulp;
carrying out thickening and filter pressing treatment on the copper concentrate ore pulp to obtain copper concentrate;
carrying out first separation scavenging and second separation scavenging on the separated roughing tailing pulp to obtain first separation scavenging concentrate pulp and second separation scavenging tailing pulp;
returning the separation scavenger first concentrate slurry and the flotation column concentration first tailings slurry to a classification stage of the rougher second concentrate slurry to participate in the regrinding closed circuit;
returning the separation scavenging second tailing pulp to a second roughing operation part of the first roughing tailing pulp to form a roughing closed circuit;
performing scavenging one and scavenging two operations on the roughing second tailing pulp to obtain scavenging second tailing pulp;
desliming the second scavenged tailing pulp, forming deslimed overflow pulp into final tailings, and stirring deslimed settled sand, and then performing first sulfur roughing, sulfur scavenging, first sulfur concentration and second sulfur concentration to obtain second sulfur concentration flotation concentrate pulp and final tailings;
and carrying out thickening and filtering treatment on the sulfur concentration secondary flotation concentrate pulp to obtain sulfur concentrate.
2. The beneficiation process of treating copper-bearing pyrite according to claim 1, wherein the first rougher concentrate slurry is combined with the separate rougher concentrate slurry for first flotation column beneficiation and second flotation column beneficiation operations, comprising:
combining the rougher concentrate pulp with the separated rougher concentrate pulp for flotation column concentration to obtain a flotation column concentrate pulp and a flotation column concentrate tailing pulp;
and performing two operations of flotation column concentration on the first concentrate pulp of the flotation column to obtain second concentrate pulp of the flotation column concentration and second tailing pulp of the flotation column concentration, wherein the second concentrate pulp of the flotation column concentration is the copper concentrate pulp.
3. The beneficiation process to treat copper-containing pyrite according to claim 2, further comprising:
and returning the second tailing pulp of the flotation column concentration to the first rougher concentrate pulp and the flotation column concentration position for separating the rougher concentrate pulp to form a flotation column concentration closed circuit.
4. The beneficiation process for treating copper-containing pyrite according to claim 1, wherein the first separation scavenging and the second separation scavenging are performed on the separated rougher tailing pulp, and the process comprises the following steps:
performing a separation scavenging operation on the separation rougher tailings slurry to obtain the separation scavenging concentrate slurry and the separation scavenging tailings slurry;
and carrying out separation and scavenging operation on the separation and scavenging ore pulp to obtain separation and scavenging ore pulp and separation and scavenging ore pulp.
5. The beneficiation process to treat copper-containing pyrite according to claim 4, further comprising:
and returning the separation scavenging second concentrate pulp to the separation scavenging first operation part of the separation roughing tailing pulp to form a separation scavenging closed circuit.
6. The beneficiation process for treating copper-containing pyrite according to claim 1, wherein the first scavenging and the second scavenging are performed on the second rougher tailing pulp, comprising:
performing scavenging one operation on the second roughing tailing pulp to obtain a scavenging one concentrate pulp and a scavenging one tailing pulp;
and carrying out scavenging two operation on the scavenging one-tailing pulp to obtain scavenging two concentrate pulp and the scavenging two-tailing pulp.
7. The beneficiation process to treat copper-containing pyrite according to claim 6, further comprising:
and returning the scavenging first concentrate pulp to a roughing second operation part of the roughing first tailing pulp to form a scavenging first closed circuit.
8. The beneficiation process to treat copper-containing pyrite according to claim 6, further comprising:
and returning the second scavenging concentrate ore pulp to the first scavenging operation of the second roughing tailing ore pulp to form a second scavenging closed circuit.
9. A beneficiation process for treating copper-containing pyrite according to claim 1, wherein the deslimed sand sediment is stirred and then subjected to sulfur roughing, sulfur scavenging, first sulfur concentration and second sulfur concentration, comprising:
performing sulfur roughing operation on the stirred deslimed settled sand to obtain sulfur roughing concentrate ore pulp and sulfur roughing tailing ore pulp;
carrying out sulfur concentration operation on the sulfur roughing concentrate ore pulp to obtain sulfur concentration-concentrate ore pulp and sulfur concentration-tailing ore pulp;
performing a second sulfur concentration operation on the first sulfur concentration concentrate pulp to obtain a second sulfur concentration concentrate pulp and a second sulfur concentration tailing pulp, wherein the second sulfur concentration concentrate pulp is the second sulfur concentration flotation concentrate pulp;
and carrying out sulfur scavenging operation on the sulfur roughing tailing pulp to obtain sulfur scavenging concentrate pulp and sulfur scavenging tailing pulp, wherein the sulfur scavenging tailing pulp is the final tailing.
10. The beneficiation process of treating copper-containing pyrite according to claim 9, further comprising:
returning the sulfur concentration-tailings slurry and the sulfur scavenger concentrate slurry to a sulfur roughing operation of the deslimed grit to form a sulfur roughing closed loop.
11. The beneficiation process of treating copper-containing pyrite according to claim 9, further comprising:
and returning the sulfur concentration secondary tailing pulp to a sulfur concentration one-operation of the sulfur roughing concentrate pulp to form a sulfur concentration closed loop.
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Application publication date: 20211012 |
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