CN117085843A - Quality and efficiency improving method for iron ore concentrate of slag beneficiation system - Google Patents
Quality and efficiency improving method for iron ore concentrate of slag beneficiation system Download PDFInfo
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- CN117085843A CN117085843A CN202311231949.8A CN202311231949A CN117085843A CN 117085843 A CN117085843 A CN 117085843A CN 202311231949 A CN202311231949 A CN 202311231949A CN 117085843 A CN117085843 A CN 117085843A
- Authority
- CN
- China
- Prior art keywords
- slag
- concentrate
- middling
- tailings
- iron ore
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 239000002893 slag Substances 0.000 title claims abstract description 68
- 239000012141 concentrate Substances 0.000 title claims abstract description 62
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005188 flotation Methods 0.000 claims abstract description 40
- 239000006148 magnetic separator Substances 0.000 claims abstract description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052802 copper Inorganic materials 0.000 claims abstract description 36
- 239000010949 copper Substances 0.000 claims abstract description 36
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000007885 magnetic separation Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 3
- 239000011707 mineral Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 4
- 239000013049 sediment Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000002699 waste material Substances 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
Abstract
The invention discloses a quality improvement and efficiency enhancement method for iron ore concentrate of a slag beneficiation system, and relates to the field of slag beneficiation. The method comprises the following steps that firstly, slag is screened to obtain slag powder and slag particles, and the slag particles are crushed to obtain slag with uniform particle size; step two, the flotation tailings in the slag beneficiation process are separated by a first-stage magnetic separator, and middling and copper tailings are obtained; according to the invention, the magnetic minerals in the flotation tailings are fully recovered through three-stage magnetic separation, so that the quality of iron concentrate is improved, and the grade of the iron concentrate is improved from 52% to 55%; according to the invention, middlings are fed into the vertical mill for regrinding and then fed into the middling flotation column for recleaning, wherein the middling granularity-325 accounts for more than 90%, the flotation effect of the middling flotation column is enhanced, the copper content of iron concentrate is effectively reduced, the copper content of the iron concentrate is reduced from 0.28% to 0.20%, and the copper metal is recovered for about 120t in year.
Description
Technical Field
The invention relates to the field of slag beneficiation, in particular to a quality improvement and efficiency enhancement method for iron concentrate of a slag beneficiation system.
Background
The flotation tailings in the original slag beneficiation process are separated by a magnetic separator, the obtained iron concentrate is concentrated by a thickener, and then is directly taken as a final product for sale after being dehydrated by a ceramic filter, the quality of the produced iron concentrate is poor, the grade and yield of the iron concentrate are both in a lower level compared with the same industry, and meanwhile, the copper content in the iron concentrate is higher, so that a great amount of copper metal is lost, and therefore, in the slag beneficiation process, the copper content of the iron concentrate is reduced as much as possible, the yield and the iron grade of the iron concentrate are improved, and the method has very important significance for resource recovery and improvement of enterprise benefit.
Disclosure of Invention
Based on the method, the invention aims to provide a quality improvement and efficiency enhancement method for iron concentrate of a slag beneficiation system, so as to solve the technical problems that the quality of the iron concentrate is poor, the grade and yield of the iron concentrate are lower compared with those of the same industry, copper content in the iron concentrate is higher, and a large amount of copper metal is lost in the original slag beneficiation process.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for improving quality and efficiency of iron ore concentrate of a slag beneficiation system comprises the following steps,
step one, screening slag to obtain slag powder and slag particles, and crushing the slag particles to obtain slag with uniform particle size;
step two, the flotation tailings in the slag beneficiation process are separated by a first-stage magnetic separator, and middling and copper tailings are obtained;
step three, placing the middling product in the step one into a middling cyclone for classification, overflowing into a middling flotation column, and after the settled sand is ground again in a vertical mill, performing classification, overflowing into the middling flotation column and then selecting to form a closed circuit;
step four, concentrate in the middling flotation column enters a main process, copper recovery is carried out by the primary flotation column, and tailing discharge enters a two-stage magnetic separator;
step five, the concentrate after the second-stage magnetic separation enters a three-stage magnetic separator, and the produced concentrate is iron concentrate;
step six, mixing the tailings of the first, second and third sections of magnetic separators into copper tailings, concentrating and filtering to obtain final iron concentrate and copper tailings for sale.
By adopting the technical scheme, the crushing amount of the crusher is reduced by a method of screening and crushing the slag, the slag with qualified granularity is prevented from being crushed and sieved again, and the efficiency and quality of the crusher are improved.
Further, the magnetic field intensity of the drum surface of the first-stage magnetic separator in the second step is 2500Gs, and the drum rotating speed is controlled to be 15-25 r/min.
Further, the magnetic field intensity of the drum surface of the two-stage magnetic separator in the fourth step is 4000Gs.
Further, the magnetic field intensity of the drum surface of the three-stage magnetic separator in the fifth step is 3000Gs.
Further, the vertical mill in the step three is a vertical spiral mill mixer, and the diameter of the vertical mill mixer is 1m-3m.
Further, the cyclone in the third step is a hydrocyclone, and the conveying capacity is 200m 3 /h～600m 3 /h。
Further, the fineness of the cyclone in the third step is 200-500 meshes.
In summary, the invention has the following advantages:
1. according to the invention, the magnetic minerals in the flotation tailings are fully recovered through three-stage magnetic separation, so that the quality of iron concentrate is improved, and the grade of the iron concentrate is improved from 52% to 55%;
2. according to the invention, middlings are fed into the vertical mill for regrinding and then fed into the middling flotation column for recleaning, wherein the middling granularity-325 accounts for 90%, the flotation effect of the middling flotation column is enhanced, the copper content of iron concentrate is effectively reduced, the copper content of the iron concentrate is reduced from 0.28% to 0.20%, and the copper metal is recovered for about 120t;
3. according to the invention, the slag is classified, the large-particle slag is crushed, so that the particle load requirement of the slag is met, the waste of iron and copper in the large-particle slag is avoided, the qualified slag can be directly subjected to flotation, the slag with larger particle size is crushed, the crushing amount of the crusher is reduced, the slag with qualified particle size is prevented from being crushed and screened again, and the efficiency and quality of the crusher are improved.
Drawings
FIG. 1 is a schematic diagram of the beneficiation process of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Hereinafter, an embodiment of the present invention will be described in accordance with its entire structure.
Embodiment one:
a method for improving quality and efficiency of iron ore concentrate of a slag beneficiation system comprises the following steps,
step one, screening slag to obtain slag powder and slag particles, and crushing the slag particles to obtain slag with uniform particle size;
step two, the flotation tailings in the slag beneficiation process are separated by a first-stage magnetic separator, the magnetic field intensity of the drum surface of the first-stage magnetic separator is 2500Gs, the drum rotating speed is controlled to be 15r/min, and middling and copper tailings are obtained;
step three, the middling product in the step one is put into a middling cyclone for classification, the cyclone is a hydrocyclone, and the conveying capacity is 200m 3 And (h) overflowing into a middling flotation column with fineness of 200 meshes, grinding the sediment in a vertical mill, then grading, overflowing into the middling flotation column to form a closed circuit, wherein the vertical mill is a vertical spiral ore grinding mixer with diameter of 1m;
step four, concentrate in a middling flotation column enters a main process, copper recovery is carried out by a primary flotation column, the tailings enter a secondary magnetic separator, and the magnetic field intensity of the cylinder surface of the secondary magnetic separator is 4000Gs;
step five, the concentrate after the second-stage magnetic separation enters a three-stage magnetic separator, the magnetic field intensity of the drum surface of the three-stage magnetic separator is 3000Gs, and the produced concentrate is iron concentrate;
step six, mixing the tailings of the first, second and third sections of magnetic separators into copper tailings, concentrating and filtering to obtain final iron concentrate and copper tailings for sale.
By the method for screening and crushing the slag, the crushing amount of the crusher is reduced, the slag with qualified granularity is prevented from being crushed and screened again, and the efficiency and quality of the crusher are improved.
Embodiment two:
a method for improving quality and efficiency of iron ore concentrate of a slag beneficiation system comprises the following steps,
step one, screening slag to obtain slag powder and slag particles, and crushing the slag particles to obtain slag with uniform particle size;
step two, the flotation tailings in the slag beneficiation process are separated by a first-stage magnetic separator, the magnetic field intensity of the drum surface of the first-stage magnetic separator is 2500Gs, and the drum rotating speed is controlled to be 20r/min, so that middling and copper tailings are obtained;
step three, the middling product in the step one is put into a middling cyclone for classification, the cyclone is a hydrocyclone, and the conveying capacity is 400m 3 And (h) overflowing into a middling flotation column with fineness of 350 meshes, grinding the sediment in a vertical mill, then grading, overflowing into the middling flotation column, and selecting again to form a closed circuit, wherein the vertical mill is a vertical spiral ore grinding mixer with diameter of 2m;
step four, concentrate in a middling flotation column enters a main process, copper recovery is carried out by a primary flotation column, the tailings enter a secondary magnetic separator, and the magnetic field intensity of the cylinder surface of the secondary magnetic separator is 4000Gs;
step five, the concentrate after the second-stage magnetic separation enters a three-stage magnetic separator, the magnetic field intensity of the drum surface of the three-stage magnetic separator is 3000Gs, and the produced concentrate is iron concentrate;
step six, mixing the tailings of the first, second and third sections of magnetic separators into copper tailings, concentrating and filtering to obtain final iron concentrate and copper tailings for sale.
According to the invention, the magnetic minerals in the flotation tailings are fully recovered through three-stage magnetic separation, so that the quality of the iron concentrate is improved, and the grade of the iron concentrate is improved from 52% to 55%.
Embodiment III:
a method for improving quality and efficiency of iron ore concentrate of a slag beneficiation system comprises the following steps,
step one, screening slag to obtain slag powder and slag particles, and crushing the slag particles to obtain slag with uniform particle size;
step two, the flotation tailings in the slag beneficiation process are separated by a first-stage magnetic separator, the magnetic field intensity of the drum surface of the first-stage magnetic separator is 2500Gs, and the drum rotating speed is controlled to be 25r/min, so that middling and copper tailings are obtained;
step three, the middling product in the step one is put into a middling cyclone for classification, the cyclone is a hydrocyclone, and the conveying capacity is 600m 3 And (h) overflowing into a middling flotation column with the fineness of 500 meshes, grinding the sediment in a vertical mill, then grading, overflowing into the middling flotation column, and selecting again to form a closed circuit, wherein the vertical mill is a vertical spiral ore grinding mixer, and the diameter of the vertical mill is 3m;
step four, concentrate in a middling flotation column enters a main process, copper recovery is carried out by a primary flotation column, the tailings enter a secondary magnetic separator, and the magnetic field intensity of the cylinder surface of the secondary magnetic separator is 4000Gs;
step five, the concentrate after the second-stage magnetic separation enters a three-stage magnetic separator, the magnetic field intensity of the drum surface of the three-stage magnetic separator is 3000Gs, and the produced concentrate is iron concentrate;
step six, mixing the tailings of the first, second and third sections of magnetic separators into copper tailings, concentrating and filtering to obtain final iron concentrate and copper tailings for sale.
According to the invention, middlings are fed into the vertical mill for regrinding and then fed into the middling flotation column for recleaning, wherein the middling granularity-325 accounts for more than 90%, the flotation effect of the middling flotation column is enhanced, the copper content of iron concentrate is effectively reduced, the copper content of the iron concentrate is reduced from 0.28% to 0.20%, and the copper metal is recovered for about 120t in year.
Although embodiments of the invention have been shown and described, the detailed description is to be construed as exemplary only and is not limiting of the invention as the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and modifications, substitutions, variations, etc. may be made in the embodiments as desired by those skilled in the art without departing from the principles and spirit of the invention, provided that such modifications are within the scope of the appended claims.
Claims (7)
1. A slag beneficiation system iron ore concentrate quality improvement and efficiency enhancement method is characterized in that: comprises the following steps of the method,
step one, screening slag to obtain slag powder and slag particles, and crushing the slag particles to obtain slag with uniform particle size;
step two, the flotation tailings in the slag beneficiation process are separated by a first-stage magnetic separator, and middling and copper tailings are obtained;
step three, placing the middling product in the step one into a middling cyclone for classification, overflowing into a middling flotation column, and after the settled sand is ground again in a vertical mill, performing classification, overflowing into the middling flotation column and then selecting to form a closed circuit;
step four, concentrate in the middling flotation column enters a main process, copper recovery is carried out by the primary flotation column, and tailing discharge enters a two-stage magnetic separator;
step five, the concentrate after the second-stage magnetic separation enters a three-stage magnetic separator, and the produced concentrate is iron concentrate;
step six, mixing the tailings of the first, second and third sections of magnetic separators into copper tailings, concentrating and filtering to obtain final iron concentrate and copper tailings for sale.
2. The method for improving quality and efficiency of the iron ore concentrate of the slag beneficiation system according to claim 1, which is characterized by comprising the following steps: and step two, controlling the magnetic field intensity of the drum surface of the first-stage magnetic separator to 2500Gs and the drum rotating speed to 15-25 r/min.
3. The method for improving quality and efficiency of the iron ore concentrate of the slag beneficiation system according to claim 1, which is characterized by comprising the following steps: and step four, the magnetic field intensity of the cylinder surface of the two-stage magnetic separator is 4000Gs.
4. The method for improving quality and efficiency of the iron ore concentrate of the slag beneficiation system according to claim 1, which is characterized by comprising the following steps: and step five, the magnetic field intensity of the drum surface of the three-stage magnetic separator is 3000Gs.
5. The method for improving quality and efficiency of the iron ore concentrate of the slag beneficiation system according to claim 1, which is characterized by comprising the following steps: the vertical mill in the third step is a vertical spiral ore grinding mixer, and the diameter of the vertical mill is 1m-3m.
6. The method for improving quality and efficiency of the iron ore concentrate of the slag beneficiation system according to claim 1, which is characterized by comprising the following steps: the cyclone in the third step is a hydrocyclone, and the conveying capacity is 200m 3/h-600 m 3 /h。
7. The method for improving quality and efficiency of the iron ore concentrate of the slag beneficiation system according to claim 1, which is characterized by comprising the following steps: the fineness of the cyclone in the third step is 200-500 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311231949.8A CN117085843A (en) | 2023-09-22 | 2023-09-22 | Quality and efficiency improving method for iron ore concentrate of slag beneficiation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311231949.8A CN117085843A (en) | 2023-09-22 | 2023-09-22 | Quality and efficiency improving method for iron ore concentrate of slag beneficiation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117085843A true CN117085843A (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311231949.8A Pending CN117085843A (en) | 2023-09-22 | 2023-09-22 | Quality and efficiency improving method for iron ore concentrate of slag beneficiation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117085843A (en) |
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2023
- 2023-09-22 CN CN202311231949.8A patent/CN117085843A/en active Pending
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