CN102430468B - Magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentrate - Google Patents
Magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentrate Download PDFInfo
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Abstract
The invention relates to a magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentration. The technology is characterized by comprising the following steps of: feeding the magnetic hematite mixed type rough concentration into a closed-circuit grinding system; feeding first-section weak magnetism through primary classification overflow; feeding the concentrate of the first-section weak magnetism into a dehydration tank; feeding the concentrate of the dehydration tank into a fine sieve; returning the coarse-grain product on the sieve to the grinding system; feeding the fine-grain product below the sieve to second-section weak magnetism; mixing the tailings of the second-section weak magnetism with the tailings of the first-section weak magnetism and the tailings of the dehydration tank to obtain weak-magnetic separation tailings; concentrating the weak-magnetic separation tailings by a concentrator, and feeding into a first-section centrifugal machine for roughing; feeding the concentrate of the first-section centrifugal machine into a second-section centrifugal machine for selection; discarding the tailings of the first-section centrifugal machine; mixing the concentrate of the second-section centrifugal machine with the second-section weak-magnetism concentrate to obtain the final concentrate; and returning the tailings of the second-section centrifugal machine to the concentrator. The technology provided by the invention is simple and efficient, has low separation cost, a good effect and high concentrate grade and metal recovery rate, and realizes efficient utilization of resources.
Description
Technical field
The present invention relates to the mine ore dressing technical field, particularly a kind of magnetic, red mixed type rough concentrate magnetic-heavily unite sorting process.
Background technology
The problem that exists in the processing and utilization process of poor iron ore is, adopting common beneficiation method to obtain the medium grade ore of (such as 52-58%) (rough concentrate) easily realizes, often technical difficulty is larger but continue to sort the concentrate product that obtains than high-grade (as more than 62%), maybe will spend the more cost that sorts.This also is the common problem that exists in the poor iron ore ore dressing process, how to adopt the dressing method of simple economy to reach the purpose of upgrading, is the basic principle of rationally utilizing ore resource and ore-dressing technique to determine.
Magnetic, red mixed type iron ore refer to the ore of MFe/TFe between 15-85% in the ore, according to China's mine knowhow, when MFe/TFe＞65%, can adopt single weak magnetic separation process to sort, MFe/TFe general associating sorting process that adopts 15-65% time sorts, and goes up said magnetic, red mixed type iron ore and refers to that generally MFe/TFe is at 15-65% ore so produce.Both at home and abroad about the process for upgrading of magnetic, red mixed type iron ore, typically have following several at present:
1, stage grinding, coarse and fine separation, chats regrind, coarse particle gravity, particulate magnetic separation-dusting cover technique, this process using stage grinding, coarse and fine separation, coarse grain is with two sections spiral sluice gravity treatments, heavy-tailedly scans the throwing tail with middle magnetic, and the gravity treatment chats is regrinded, tail is thrown in the particulate magnetic separation, coarse particle gravity concentrate and particulate magnetic concentrate reach respectively the purpose of upgrading by dusting cover, shortcoming is not high to the microfine hematite-limonite rate of recovery, easily causes than Heavy metals;
2, stage grinding, strong magnetic-gravity separation technology of stage, this process using ore grinding, one section high intensity magnetic separation, secondary grinding, two sections high intensity magnetic separations carry out the spiral chute gravity treatment to two sections high intensity magnetic separation concentrate and must weigh essence, chats and mine tailing, and chats and mine tailing are carried out table concentration, heavy essence and shake essence and be combined and be concentrate, shortcoming is that the high intensity magnetic separation treating capacity is larger, and equipment investment is higher, in addition, the direct high intensity magnetic separation of mixed type rough concentrate easily causes the obstruction of equipment medium, affects the technique direct motion;
3, Continuous Grinding, weak magnetic, strong magnetic-anion reverse floatation technique, this technique by two sections Continuous Grindings, makes grinding particle size reach monomer dissociation first, power consume is higher, can cause the overground of iron mineral, tailings grade higher, process metal runs off heavier, and metal recovery rate is not high;
4, stage grinding, weak magnetic, strong magnetic-centrifuge gravity separation technology, this technique is passed through ore grinding, low intensity magnetic separation, strong magnetic is scanned, mixed magnetic concentrate regrinding ore deposit, two sections low intensity magnetic separations, two sections strong magnetic are scanned, two sections mixed magnetic concentrate carry out the centrifuge gravity treatment and obtain final concentrate, this technique is compared with technique 2, and structure is relatively reasonable, but strong magnetic is thrown tail in these two techniques, especially the strong magnetic of a section under the corase grind condition is thrown the tail DeGrain, thereby the amount of regrinding is larger, and sorting operation ore deposit amount is larger, and power consume is higher, cost is higher.
Summary of the invention
The purpose of this invention is to provide a kind of technique simple efficient, sort the magnetic that cost is low, metal recovery rate is high, red mixed type rough concentrate magnetic-heavily unite sorting process.
The objective of the invention is to realize by following technical proposals:
Magnetic of the present invention, red mixed type rough concentrate magnetic-heavily unite sorting process, it is characterized in that adopting the mode that sorts step by step, namely at first adopting ore grinding, weak magnetic---dusting cover technique sorts out the Armco magnetic iron mineral in magnetic, the red mixed type rough concentrate come, by the centrifuge gravity separation technology weak magnetic mineral in magnetic, the red mixed type rough concentrate is sorted out again, concrete steps are as follows:
1) with granularity be-200 order content 65-80%, the magnetic of grade 52-58%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 90-95%, magnetic a little less than the grind grading overflow of weight concentration 30-40% feeds one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the concentrate of drench pit feeds dusting cover,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 47 ~ 50%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 20-25% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and the mine tailing of one section centrifuge is that true tailings is abandoned,
8) concentrate of two sections centrifuges and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 63-65%, two sections centrifuges turns back to thickener.
The magnet separator magnetic field intensity of magnetic is 2000-2200Oe a little less than in the of described one section.
The magnet separator magnetic field intensity of magnetic is 1800-2000Oe a little less than in the of described two sections.
The magnetic field intensity of described drench pit is 800-1000Oe.
Described dusting cover is high frequency vibrating screen, and screen size is (0.08-0.10) * (0.08-0.10) mm.
Perhaps:
1) with granularity be-200 order content 65.2%, the magnetic of grade 51.2%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 94.24%, magnetic a little less than the grind grading overflow of weight concentration 35.0% feeds one section, the magnetic field intensity of one section weak magnetic separator is 2150 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 49.35% a little less than in the of 59.87%, one section a little less than one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of drench pit is 950 Oe, and the concentrate grade of drench pit is 62.18%, and the tailings grade of drench pit is 48.02%, and the concentrate of drench pit feeds high frequency vibrating screen, and screen size is 0.09 * 0.09mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections weak magnetic separators is 1900 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 60.29% a little less than in the of 65.40%, two section a little less than two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 49.43%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 22.5% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and grade is that one section centrifuge mine tailing of 28.65% is that true tailings is abandoned,
8) grade is that two sections centrifuge concentrate of 63.96% and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 63.45%, two section centrifuge turns back to thickener.
Perhaps:
1) with granularity be-200 order content 67.51%, the magnetic of grade 54.49%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 93.74%, magnetic a little less than the grind grading overflow of weight concentration 33.5% feeds one section, the magnetic field intensity of one section weak magnetic separator is 2100 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 49.57% a little less than in the of 60.60%, one section a little less than one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of drench pit is 900 Oe, and the concentrate grade of drench pit is 62.66%, and the tailings grade of drench pit is 47.78%, and the concentrate of drench pit feeds high frequency vibrating screen, and screen size is 0.09 * 0.09mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections weak magnetic separators is 1900 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 41.23% a little less than in the of 64.33%, two section a little less than two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 49.20%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 23.5% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and grade is that one section centrifuge mine tailing of 30.51% is that true tailings is abandoned,
8) grade is that two sections centrifuge concentrate of 63.24% and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 63.77%, two section centrifuge turns back to thickener.
Perhaps:
1) with granularity be-200 order content 72.0%, the magnetic of grade 57.30%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 93.50%, magnetic a little less than the grind grading overflow of weight concentration 35.5% feeds one section, the magnetic field intensity of one section weak magnetic separator is 2000 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 49.64% a little less than in the of 60.88%, one section a little less than one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of drench pit is 850 Oe, and the concentrate grade of drench pit is 63.02%, and the tailings grade of drench pit is 48.25%, and the concentrate of drench pit feeds high frequency vibrating screen, and screen size is 0.08 * 0.08mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections weak magnetic separators is 1900 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 44.25% a little less than in the of 65.40%, two section a little less than two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 48.96%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 24.10% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and grade is that one section centrifuge mine tailing of 30.95% is that true tailings is abandoned,
8) grade is that two sections centrifuge concentrate of 62.84% and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 64.38%, two section centrifuge turns back to thickener.
The advantage of magnetic of the present invention, red mixed type rough concentrate magnetic-heavily unite sorting process is:
The magnetic different according to iron mineral adopt the mode that sorts step by step, namely at first adopt simple efficiently " ore grinding, weak magnetic-dusting cover technique " to sort the Armco magnetic iron mineral that easily select in magnetic, the red mixed type rough concentrate, obtain magnetite concentrate; Sorting the weak magnetic mineral of enrichment in magnetic, the red mixed type rough concentrate by " centrifuge gravity separation technology ", mainly is that particulate is red, the limonite thing again.Embodied the Advanced Idea of " can receive early and receive, can throw early and throw ", " low-cost ore dressing ", realized the degree of depth of mixed type rough concentrate is sorted.
This technique is applicable to the degree of depth that extreme poverty or poor iron ore sort the rough concentrate product that obtains in the process and sorts, and realizes the purpose of upgrading removal of impurities.Iron in ore content is 50-58%, sorts rear concentrate grade and brings up to 63-65%, and metal recovery rate reaches 80-89%.
Technique of the present invention is simply efficient; sort cost low; effective; concentrate grade and metal recovery rate are high; be easy to realize stable operation in the production; avoided the problem that concentrate viscosity is large, filtration is difficult because adopting floatation process that with medicament is brought, and has reduced the pollution level of water, so that the process that sorts of whole technique is efficient, energy-saving and environmental protection.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
As shown in Figure 1, magnetic of the present invention, red mixed type rough concentrate magnetic-heavily unite sorting process, it is characterized in that adopting the mode that sorts step by step, namely at first adopting ore grinding, weak magnetic---dusting cover technique sorts out the Armco magnetic iron mineral in magnetic, the red mixed type rough concentrate come, by the centrifuge gravity separation technology weak magnetic mineral in magnetic, the red mixed type rough concentrate is sorted out again, concrete steps are as follows:
1) with granularity be-200 order content 65-80%, the magnetic of grade 52-58%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 90-95%, magnetic a little less than the grind grading overflow of weight concentration 30-40% feeds one section, the magnet separator magnetic field intensity of magnetic is 2000-2200Oe a little less than this section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of this drench pit is 800-1000Oe, and the concentrate of drench pit feeds dusting cover, and this dusting cover is high frequency vibrating screen, and screen size is (0.08-0.10) * (0.08-0.10) mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnet separator magnetic field intensity of magnetic is 1800-2000Oe a little less than these two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 47 ~ 50%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 20-25% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and the mine tailing of one section centrifuge is that true tailings is abandoned,
8) concentrate of two sections centrifuges and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 63-65%, two sections centrifuges turns back to thickener.
Embodiment 1
1) with granularity be-200 order content 65.2%, the magnetic of grade 51.2%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 94.24%, magnetic a little less than the grind grading overflow of weight concentration 35.0% feeds one section, the magnetic field intensity of one section weak magnetic separator is 2150 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 49.35% a little less than in the of 59.87%, one section a little less than one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of drench pit is 950 Oe, and the concentrate grade of drench pit is 62.18%, and the tailings grade of drench pit is 48.02%, and the concentrate of drench pit feeds high frequency vibrating screen, and screen size is 0.09 * 0.09mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections weak magnetic separators is 1900 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 60.29% a little less than in the of 65.40%, two section a little less than two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 49.43%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 22.5% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and grade is that one section centrifuge mine tailing of 28.65% is that true tailings is abandoned,
8) grade is that two sections centrifuge concentrate of 63.96% and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 63.45%, two section centrifuge turns back to thickener.
In the present embodiment, the final concentrate grade brings up to 63.45%, and the true tailings grade is 28.65%.Metal recovery rate reaches 80.30%.
Embodiment 2
1) with granularity be-200 order content 67.51%, the magnetic of grade 54.49%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 93.74%, magnetic a little less than the grind grading overflow of weight concentration 33.5% feeds one section, the magnetic field intensity of one section weak magnetic separator is 2100 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 49.57% a little less than in the of 60.60%, one section a little less than one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of drench pit is 900 Oe, and the concentrate grade of drench pit is 62.66%, and the tailings grade of drench pit is 47.78%, and the concentrate of drench pit feeds high frequency vibrating screen, and screen size is 0.09 * 0.09mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections weak magnetic separators is 1900 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 41.23% a little less than in the of 64.33%, two section a little less than two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 49.20%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 23.5% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and grade is that one section centrifuge mine tailing of 30.51% is that true tailings is abandoned,
8) grade is that two sections centrifuge concentrate of 63.24% and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 63.77%, two section centrifuge turns back to thickener.
In the present embodiment, the final concentrate grade brings up to 63.77%, and the true tailings grade is 30.51%, and metal recovery rate reaches 84.39%.
Embodiment 3
1) with granularity be-200 order content 72.0%, the magnetic of grade 57.30%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 93.50%, magnetic a little less than the grind grading overflow of weight concentration 35.5% feeds one section, the magnetic field intensity of one section weak magnetic separator is 2000 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 49.64% a little less than in the of 60.88%, one section a little less than one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of drench pit is 850 Oe, and the concentrate grade of drench pit is 63.02%, and the tailings grade of drench pit is 48.25%, and the concentrate of drench pit feeds high frequency vibrating screen, and screen size is 0.08 * 0.08mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections weak magnetic separators is 1900 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 44.25% a little less than in the of 65.40%, two section a little less than two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 48.96%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 24.10% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and grade is that one section centrifuge mine tailing of 30.95% is that true tailings is abandoned,
8) grade is that two sections centrifuge concentrate of 62.84% and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 64.38%, two section centrifuge turns back to thickener.
In the present embodiment, the final concentrate grade brings up to 64.38%, and the true tailings grade is 30.95%, and metal recovery rate reaches 88.57%.
Claims (7)
1. a magnetic, red mixed type rough concentrate magnetic-heavily unite sorting process, it is characterized in that adopting the mode that sorts step by step, namely at first adopting ore grinding, weak magnetic---dusting cover technique sorts out the Armco magnetic iron mineral in magnetic, the red mixed type rough concentrate come, by the centrifuge gravity separation technology weak magnetic mineral in magnetic, the red mixed type rough concentrate is sorted out again, concrete steps are as follows:
1) with granularity be-200 order content 65-80%, the magnetic of grade 52-58%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 90-95%, magnetic a little less than the grind grading overflow of weight concentration 30-40% feeds one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the concentrate of drench pit feeds dusting cover,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 47 ~ 50%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 20-25% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and the mine tailing of one section centrifuge is that true tailings is abandoned,
8) concentrate of two sections centrifuges and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 63-65%, two sections centrifuges turns back to thickener.
2. magnetic according to claim 1, red mixed type rough concentrate magnetic-heavily unite sorting process, the magnet separator magnetic field intensity that it is characterized in that magnetic a little less than in the of described one section is 2000-2200Oe.
3. magnetic according to claim 1, red mixed type rough concentrate magnetic-heavily unite sorting process, the magnet separator magnetic field intensity that it is characterized in that magnetic a little less than in the of described two sections is 1800-2000Oe.
4. magnetic according to claim 1, red mixed type rough concentrate magnetic-heavily unite sorting process, the magnetic field intensity that it is characterized in that described drench pit is 800-1000Oe.
5. magnetic according to claim 1, red mixed type rough concentrate magnetic-heavily unite sorting process is characterized in that described dusting cover is high frequency vibrating screen, and screen size is (0.08-0.10) * (0.08-0.10) mm.
6. the according to claim 1 described magnetic of arbitrary claim, red mixed type rough concentrate magnetic-heavily unite sorting process in 5 is characterized in that:
1) with granularity be-200 order content 67.51%, the magnetic of grade 54.49%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 93.74%, magnetic a little less than the grind grading overflow of weight concentration 33.5% feeds one section, the magnetic field intensity of one section weak magnetic separator is 2100 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 49.57% a little less than in the of 60.60%, one section a little less than one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of drench pit is 900 Oe, and the concentrate grade of drench pit is 62.66%, and the tailings grade of drench pit is 47.78%, and the concentrate of drench pit feeds high frequency vibrating screen, and screen size is 0.09 * 0.09mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections weak magnetic separators is 1900 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 41.23% a little less than in the of 64.33%, two section a little less than two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 49.20%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 23.5% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and grade is that one section centrifuge mine tailing of 30.51% is that true tailings is abandoned,
8) grade is that two sections centrifuge concentrate of 63.24% and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 63.77%, two section centrifuge turns back to thickener.
7. the according to claim 1 described magnetic of arbitrary claim, red mixed type rough concentrate magnetic-heavily unite sorting process in 5 is characterized in that:
1) with granularity be-200 order content 72.0%, the magnetic of grade 57.30%, red mixed type rough concentrate feed the closed circuit grinding system that is comprised of ore grinding and classification,
2) granularity-200 order content 93.50%, magnetic a little less than the grind grading overflow of weight concentration 35.5% feeds one section, the magnetic field intensity of one section weak magnetic separator is 2000 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 49.64% a little less than in the of 60.88%, one section a little less than one section,
3) concentrate of magnetic feeds drench pit a little less than one section, and the magnetic field intensity of drench pit is 850 Oe, and the concentrate grade of drench pit is 63.02%, and the tailings grade of drench pit is 48.25%, and the concentrate of drench pit feeds high frequency vibrating screen, and screen size is 0.08 * 0.08mm,
4) the coarse grain product on the sieve turns back to ore grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections weak magnetic separators is 1900 Oe, the concentrate grade of magnetic is that the tailings grade of magnetic is 44.25% a little less than in the of 65.40%, two section a little less than two sections,
5) a little less than two sections a little less than the mine tailing of magnetic and one section mine tailing, the drench pit mine tailing of magnetic mix and be the low intensity magnetic separation mine tailing, its grade is 48.96%, it is concentrated that this magnetic tailing feeds thickener,
6) concentration is that 24.10% thickener underflow feeds one section centrifuge and roughly selects, and the overflow of thickener is abandoned,
7) concentrate of one section centrifuge feeds two sections centrifuges and carries out selectedly, and grade is that one section centrifuge mine tailing of 30.95% is that true tailings is abandoned,
8) grade is that two sections centrifuge concentrate of 62.84% and two sections inferior fine magnetite concentrates are combined and are that final concentrate, its grade are that the mine tailing of 64.38%, two section centrifuge turns back to thickener.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110277701 CN102430468B (en) | 2011-09-19 | 2011-09-19 | Magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentrate |
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| CN 201110277701 CN102430468B (en) | 2011-09-19 | 2011-09-19 | Magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentrate |
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| CN102430468A CN102430468A (en) | 2012-05-02 |
| CN102430468B true CN102430468B (en) | 2013-04-17 |
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