CN102441481B - Mineral separation process for magnetic hematite rough concentrates - Google Patents
Mineral separation process for magnetic hematite rough concentrates Download PDFInfo
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Abstract
The invention relates to a mineral separation process for magnetic hematite rough concentrates, which comprises the following steps of: feeding the magnetic hematite rough concentrates into a closed circuit grinding system; once grading, overflowing and feeding into weak magnetism at first section; feeding the concentrates in the weak magnetism at the first section into a dewatering tank; feeding the concentrates in the dewatering tank into a fine sieve; returning rough particle products on the sieve into the first section for grinding; feeding fine particle products under the sieve into weak magnetism at second section; mixing tailings in the weak magnetism at the second section, tailings in the weak magnetism at the first section and tailings in the dewatering tank to obtain low intensity magnetic separation tailings; concentrating the low intensity magnetic separation tailings by a concentrating machine; feeding into a closed circuit regrinding system; grading, overflowing and feeding again into strong magnetism; concentrating strong magnetic concentrates by the concentrating machine; feeding into a negative ion reverse flotation process including one-time rough separation, one-time fine separation and three-time scavenging; combining the strong magnetic tailings with the floatation tailings to obtain final tailings; and combining the concentrates in the weak magnetism at the second section with the flotation concentrates to obtain final concentrates. The mineral separation process provided by the invention is simple, high-efficiency, particularly low-cost, good in effect and high in concentrate quality and metal recovery rate, and realizes high-efficiency utilization of resources.
Description
Technical field
The present invention relates to the mine ore dressing technical field, particularly a kind of mixed type rough concentrate ore-dressing technique.
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 (as 52-57%) (rough concentrate) realizes easily, often technical difficulty is bigger 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 carrying Fe and reducing Si, 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, so said mixed type iron ore refers to that generally MFe/TFe is at 15-65% ore on producing.At present both at home and abroad relevant magnetic, red mixed type iron ore put forward Fe and reducing Si technology, typically have following several:
1, stage grinding, coarse and fine separation, chats regrind, coarse grain gravity treatment, particulate magnetic separation-dusting cover technology, 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 grain gravity concentrate and particulate magnetic concentrate are carried Fe and reducing Si with the dressing method of dusting cover upgrading respectively, and shortcoming is not high to the microfine hematite-limonite rate of recovery, easily causes than heavy metal and runs off.
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 smart and shake essence and lump together and be concentrate, shortcoming is that the high intensity magnetic separation treating capacity is bigger, and equipment investment is higher, in addition, the direct high intensity magnetic separation of mixed type iron ore easily causes the obstruction of equipment medium, influences the technology direct motion.
3, continuous ore grinding, weak magnetic, strong magnetic-anion reverse floatation technology, this technology by two sections continuous ore grindings, makes grinding particle size reach monomer dissociation earlier, 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 technology is passed through ore grinding, low intensity magnetic separation, strong magnetic is scanned, mix 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 technology is compared with technology 2, and structure is relatively reasonable, but strong magnetic is thrown tail in these two technologies, especially the strong magnetic of a section under the corase grind condition is thrown the tail DeGrain, thereby the amount of regrinding is bigger, and sorting operation ore deposit amount is bigger, and power consume is higher, cost is higher.
Summary of the invention
Order of the present invention have provide a kind of technology simple efficient, sort the magnetic that cost is low, metal recovery rate is high, red mixed type rough concentrate ore-dressing technique.
The objective of the invention is to realize by following technical proposals:
Magnetic of the present invention, red mixed type rough concentrate ore-dressing technique, it is characterized in that adopting the mode that sorts step by step, namely at first adopting ore grinding, weak magnetic---dusting cover technology sorts out the Armco magnetic iron mineral in magnetic, the red mixed type rough concentrate come, again by regrind, strong magnetic-anion reverse floatation technology sorts out with the weak magnetic mineral in magnetic, the red mixed type rough concentrate, concrete steps are as follows:
1) with granularity be-200 order content 65-80%, grade 50-58%, dioxide-containing silica is that 21-12% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 90-95%, magnetic a little less than the scalping 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 primary 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 40-45%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 85-90%, the overflow of classification again of weight concentration 30-35% feeds strong magnetic,
7) grade be 50-55% strong magnetic concentrate after thickener concentrates, concentration reaches 40-45%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64-65% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be that true tailings, its grade are 24-26%.
The magnetic separator magnetic field intensity of magnetic is 2000-2200Oe a little less than in the of described one section.
The magnetic 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.
The strong magnetic machine magnetic induction intensity of described strong magnetic is 0.4-0.6T.
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%, grade 51.2%, dioxide-containing silica is that 20.6% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 94.24%, magnetic a little less than the scalping overflow of weight concentration 35.0% feeds one section, the magnetic field intensity of one section low intensity magnetic separation machine 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections low intensity magnetic separation machines 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 41.5%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 89.4%, the overflow of classification again of weight concentration 31.25% feeds strong magnetic machine, and the magnetic induction intensity of strong magnetic machine is 0.52T,
7) grade be 52.83% strong magnetic concentrate after thickener concentrates, concentration reaches 44.30%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64.2% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be that true tailings, its grade are 24.32%.
Perhaps:
1) with granularity be-200 order content 67.51%, grade 54.49%, dioxide-containing silica is that 16.10% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 93.74%, magnetic a little less than the scalping overflow of weight concentration 33.5% feeds one section, the magnetic field intensity of one section low intensity magnetic separation machine 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections low intensity magnetic separation machines 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 43.5%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 88.5%, the overflow of classification again of weight concentration 33.5% feeds strong magnetic machine, and the magnetic induction intensity of strong magnetic machine is 0.5T,
7) grade be 53.30% strong magnetic concentrate after thickener concentrates, concentration reaches 43.8%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64.26% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be that true tailings, its grade are 24.75%.
Perhaps:
1) with granularity be-200 order content 72.0%, grade 57.30%, dioxide-containing silica is that 12.24% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 93.50%, magnetic a little less than the scalping overflow of weight concentration 35.5% feeds one section, the magnetic field intensity of one section low intensity magnetic separation machine 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections low intensity magnetic separation machines 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 65.20%, 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 43.5%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 87.4%, the overflow of classification again of weight concentration 36.5% feeds strong magnetic machine, and the magnetic induction intensity of strong magnetic machine is 0.5T,
7) grade be 52.43% strong magnetic concentrate after thickener concentrates, concentration reaches 44.6%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64.70% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be that true tailings, its grade are 24.07%.
The advantage of magnetic of the present invention, red mixed type rough concentrate ore-dressing technique is:
Mode according to the different magnetic of iron mineral adopts substep to sort namely at first adopts advantages of simplicity and high efficiency " ore grinding, weak magnetic-dusting cover technology " to sort the Armco magnetic iron mineral that easily select in magnetic, the red mixed type rough concentrate, obtains magnetite concentrate; Sorting the weak magnetic mineral of enrichment in magnetic, the red mixed type rough concentrate again by " regrind, strong magnetic-anion reverse floatation technology " of the dark choosing of fine grinding, mainly is that particulate is red, the limonite thing.Embody the advanced theory of " can receive early and receive, can throw early and throw ", " low-cost ore dressing ", reached the purpose of carrying Fe and reducing Si.
This technology is applicable to that extreme poverty or poor iron ore sort the Fe and reducing Si of carrying of the rough concentrate product that obtains in the process, also is applicable to the Fe and reducing Si of carrying of rough concentrate product that spoil reclaming obtains.Iron in ore content is 50-58%, and dioxide-containing silica 21-12% sorts the back concentrate grade and brings up to 64-65%, and dioxide-containing silica drops to 6.5-5.0% in the concentrate, and metal recovery rate reaches 84-93%.
Technology of the present invention is simply efficient, and it is low, effective to sort cost, and concentrate grade and metal recovery rate height are easy to realize stable operation in the production, has solved technical barrier thick in extreme poverty or the poor iron ore beneficiation, the concentrate upgrading, has realized the efficient utilization of resource.
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 ore-dressing technique, it is characterized in that adopting the mode that sorts step by step, namely at first adopting ore grinding, weak magnetic---dusting cover technology sorts out the Armco magnetic iron mineral in magnetic, the red mixed type rough concentrate come, again by regrind, strong magnetic-anion reverse floatation technology sorts out with the weak magnetic mineral in magnetic, the red mixed type rough concentrate, concrete steps are as follows:
1) with granularity be-200 order content 65-80%, grade 50-58%, dioxide-containing silica is that 12-21% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 90-95%, magnetic a little less than the scalping overflow of weight concentration 30-40% feeds one section, the magnetic 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 40-45%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 85-90%, the overflow of classification again of weight concentration 30-35% feeds strong magnetic, and the strong magnetic machine magnetic induction intensity of this strong magnetic is 0.4-0.6T,
7) grade be 50-55% strong magnetic concentrate after thickener concentrates, concentration reaches 40-45%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64-65% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be that true tailings, its grade are 24-26%.
Embodiment 1
1) with granularity be-200 order content 65.2%, grade 51.2%, dioxide-containing silica is that 20.6% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 94.24%, magnetic a little less than the scalping overflow of weight concentration 35.0% feeds one section, the magnetic field intensity of one section low intensity magnetic separation machine 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections low intensity magnetic separation machines 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 41.5%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 89.4%, the overflow of classification again of weight concentration 31.25% feeds strong magnetic machine, and the magnetic induction intensity of strong magnetic machine is 0.52T,
7) grade be 52.83% strong magnetic concentrate after thickener concentrates, concentration reaches 44.30%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64.2% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be true tailings.
In the present embodiment, the final concentrate grade brings up to 64.2%, and the true tailings grade is 24.32%.Dioxide-containing silica is down to 6.16%, and metal recovery rate reaches 84.53%.
Embodiment 2
1) with granularity be-200 order content 67.51%, grade 54.49%, dioxide-containing silica is that 16.10% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 93.74%, magnetic a little less than the scalping overflow of weight concentration 33.5% feeds one section, the magnetic field intensity of one section low intensity magnetic separation machine 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections low intensity magnetic separation machines 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 43.5%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 88.5%, the overflow of classification again of weight concentration 33.5% feeds strong magnetic machine, and the magnetic induction intensity of strong magnetic machine is 0.5T,
7) grade be 53.30% strong magnetic concentrate after thickener concentrates, concentration reaches 43.8%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64.26% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be true tailings.
In the present embodiment, the final concentrate grade brings up to 64.26%, and the true tailings grade is 24.75%, and dioxide-containing silica is down to 6.14%, and metal recovery rate reaches 88.71%.
Embodiment 3
1) with granularity be-200 order content 72.0%, grade 57.30%, dioxide-containing silica is that 12.24% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 93.50%, magnetic a little less than the scalping overflow of weight concentration 35.5% feeds one section, the magnetic field intensity of one section low intensity magnetic separation machine 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections low intensity magnetic separation machines 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 65.20%, 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 43.5%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 87.4%, the overflow of classification again of weight concentration 36.5% feeds strong magnetic machine, and the magnetic induction intensity of strong magnetic machine is 0.5T,
7) grade be 52.43% strong magnetic concentrate after thickener concentrates, concentration reaches 44.6%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64.70% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be true tailings.
In the present embodiment, the final concentrate grade brings up to 64.70%, and the true tailings grade is 24.07%, and dioxide-containing silica is down to 5.51%, and metal recovery rate reaches 92.36%.
Claims (8)
1. a magnetic, red mixed type rough concentrate ore-dressing technique, it is characterized in that adopting the mode that sorts step by step, namely at first adopting ore grinding, weak magnetic---dusting cover technology sorts out the Armco magnetic iron mineral in magnetic, the red mixed type rough concentrate come, again by regrind, strong magnetic-anion reverse floatation technology sorts out with the weak magnetic mineral in magnetic, the red mixed type rough concentrate, concrete steps are as follows:
1) with granularity be-200 order content 65-80%, grade 50-58%, dioxide-containing silica is that 21-12% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 90-95%, magnetic a little less than the scalping 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 primary 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 40-45%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 85-90%, the overflow of classification again of weight concentration 30-35% feeds strong magnetic,
7) grade be 50-55% strong magnetic concentrate after thickener concentrates, concentration reaches 40-45%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64-65% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be that true tailings, its grade are 24-26%.
2. magnetic according to claim 1, red mixed type rough concentrate ore-dressing technique, the magnetic 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 ore-dressing technique, the magnetic 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 ore-dressing technique, 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 ore-dressing technique is characterized in that the strong magnetic machine magnetic induction intensity of described strong magnetic is 0.4-0.6T.
6. magnetic according to claim 1, red mixed type rough concentrate ore-dressing technique 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.
7. according to the described magnetic of arbitrary claim, red mixed type rough concentrate ore-dressing technique in the claim 1 to 6, it is characterized in that:
1) with granularity be-200 order content 65.2%, grade 51.2%, dioxide-containing silica is that 20.6% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 94.24%, magnetic a little less than the scalping overflow of weight concentration 35.0% feeds one section, the magnetic field intensity of one section low intensity magnetic separation machine 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections low intensity magnetic separation machines 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 41.5%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 89.4%, the overflow of classification again of weight concentration 31.25% feeds strong magnetic machine, and the magnetic induction intensity of strong magnetic machine is 0.52T,
7) grade be 52.83% strong magnetic concentrate after thickener concentrates, concentration reaches 44.30%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64.2% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be that true tailings, its grade are 24.32%.
8. according to the described magnetic of arbitrary claim, red mixed type rough concentrate ore-dressing technique in the claim 1 to 6, it is characterized in that:
1) with granularity be-200 order content 67.51%, grade 54.49%, dioxide-containing silica is that 16.10% magnetic, red mixed type rough concentrate feed by primary grinding and one section closed circuit grinding system that classification is formed,
2) granularity-200 order content 93.74%, magnetic a little less than the scalping overflow of weight concentration 33.5% feeds one section, the magnetic field intensity of one section low intensity magnetic separation machine 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 primary grinding, magnetic a little less than the particulate product under the sieve feeds two sections, and the magnetic field intensity of two sections low intensity magnetic separation machines 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%, and this magnetic tailing is after thickener concentrates, and concentration reaches 43.5%, feed the closed circuit grinding system of being formed by regrind cyclone and the ball mill of regrinding again
6) granularity-320 order content 88.5%, the overflow of classification again of weight concentration 33.5% feeds strong magnetic machine, and the magnetic induction intensity of strong magnetic machine is 0.5T,
7) grade be 53.30% strong magnetic concentrate after thickener concentrates, concentration reaches 43.8%, feeds rough floatation,
8) concentrate of rough floatation feeds cleaner flotation, and the mine tailing of rough floatation feeds one section and scans,
9) concentrate of magnetic lumps together and is that final concentrate, its grade are 64.26% a little less than the concentrate of cleaner flotation and two sections, and the mine tailing of cleaner flotation turns back to rough floatation,
10) one section concentrate of scanning turns back to rough floatation, and one section mine tailing of scanning feeds two sections and scans,
11) two sections concentrate of scanning turn back to one section and scan, and two sections mine tailings of scanning feed three sections and scan,
12) three sections concentrate of scanning turn back to two sections and scan, and three sections mine tailings of scanning are flotation tailing, and strong magnetic tail ore deposit and flotation tailing lump together and be that true tailings, its grade are 24.75%.
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| CN102728453B (en) * | 2012-06-17 | 2013-08-07 | 鞍钢集团矿业设计研究院 | New technology for sorting lean hematite and magnetite orecontaining iron carbonate |
| CN103464273B (en) * | 2013-09-04 | 2015-03-11 | 鞍钢集团矿业公司 | Process for sorting iron-carbonate-containing low-grade iron ore concentrate |
| CN103586146B (en) * | 2013-11-13 | 2015-05-13 | 鞍钢集团矿业公司 | Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company |