CN216125814U - High-efficiency preselection production system for high-sulfur composite iron ore - Google Patents

Abstract

The utility model discloses an efficient preselection production system of high-sulfur composite iron ore, and relates to the technical field of iron ore beneficiation. The high-efficiency pre-selection production system of the high-sulfur composite iron ore comprises a raw ore bin, a plate feeder, a jaw crusher, a middle-crushing buffer ore bin, a middle-crushing cone crusher, a screening buffer ore bin and a vibrating screen which are sequentially arranged; products under the vibrating screen enter a main workshop to carry out subsequent ore grinding and dressing; feeding products on a sieve into a weak magnetic dry separator, uniformly feeding tailings of the weak magnetic dry separator into an XRT intelligent dry separator by a vibrating feeder, and performing intelligent dry separation on the tailings subjected to the weak magnetic dry separation to discard gangue minerals in advance; the sulfur-containing iron ore and the like sorted by the XRT intelligent dry separator are combined with the weak magnetic concentrate of the weak magnetic dry separator and then enter a fine crushing cone crusher, fine crushing and medium crushing products are mixed and enter a screening operation, and a closed circuit is formed by screening, weak magnetic dry separation, intelligent dry separation and fine crushing, so that all the crushed products are effectively preselected.

Description

High-efficiency preselection production system for high-sulfur composite iron ore

Technical Field

The utility model relates to the technical field of iron ore beneficiation, in particular to a high-efficiency pre-selection production system for high-sulfur composite iron ore.

Background

Energy conservation is the most important and economic means for realizing carbon neutralization, and mining industry is the industry with high energy consumption in China, so that mine enterprises are required to find out key points for energy conservation and consumption reduction from slight points according to different conditions and ore characteristics of the mine enterprises, and on the premise of ensuring the technical indexes of mineral separation, the mine enterprises comprehensively research and adopt corresponding new energy-saving technologies and new equipment to realize energy conservation and consumption reduction.

Iron ore resources of iron ores in China are characterized by more lean ores, less rich ores, more associated ores, more complex ore components and most finer ore disseminated granularity, which causes certain difficulty in ore dressing. Therefore, new technology and new equipment application are urgently needed, mineral resources are comprehensively recycled, and efficient development and utilization of lean iron ore resources are realized. And the tail is pre-selected and thrown before ore grinding in the ore dressing plant, so that the 'early throwing can be thrown', the raw ore quantity of a grinding and dressing system is reduced, and the method is one of the main means for realizing energy conservation and consumption reduction.

Dry magnetic pulleys and a large magnetic separator are mostly adopted for preselection of a single magnet mine to realize weak magnetic dry magnetic separation tailing discarding before grinding, and currently, dozens of magnetic separation plants in China adopt preselection, wherein the preselection includes ore dressing plants such as Dashihe, waterworks, askew mountain, Luzhong, Jinling, Chengshan, Zhangzhuang, Emei and the like; however, for high-sulfur complex iron ore containing hematite and pyrite, the main iron mineral in the ore is magnetite (Fe)₃O₄) And hematite (Fe)₂O₃) In addition, the iron ore is associated with high-grade pyrite and other metal minerals, and occupies a large proportion in iron ore deposits in China, such as Anhui Ma-Steel Roehe iron ore, Wuhan-Dayue iron ore, Shanghai-Bao-Steel Meishan iron ore and Anhui Lujiang Longqiao iron ore.

For high-sulfur magnetite ore raw ore containing pyrite, the TFe (total iron) grade of the raw ore is more than 25%, the magnetic iron occupancy is more than 60%, the S content is between 4 and 10%, and the useful elements to be recovered of the raw ore of the high-sulfur composite iron ore which is associated with pyrite are iron and sulfur. Pyrite is an important raw material for the manufacture of sulphuric acid, which is recovered by flotation in subsequent grinding operations.

Through search, if the Chinese patent application number is: 201910212853.4, application date is: 3, 20 and 2020, 5, 19, respectively in 2019, and discloses a method for sorting high-sulfate iron ore, which adopts 'grinding, flotation and sulfide ore selection and low-intensity magnetic separation magnetite' to effectively remove sulfate sulfur in the iron ore and realize high-efficiency separation of magnet minerals and sulfate minerals, but no tailing discarding is performed before grinding, and the ore-sorting cost is high.

Also, for example, the Chinese patent application number is: 201710795438.7, application date is: 19 days in 2018, 1 month and authorized announcement days are as follows: in 2019, 10 months and 25 days, a beneficiation method for improving beneficiation indexes of high-sulfur magnetic-hematite mixed iron ore is disclosed, and the beneficiation method adopts a process of stage grinding, sulfur flotation, magnetite low-intensity magnetic separation and hematite high-intensity magnetic separation. However, if the high-sulfur composite iron ore is subjected to weak magnetic dry separation and tailing discarding, the pyrite and the hematite can enter the tailings together with the gangue, and the tailings contain the hematite and the pyrite, so that the recovery rate of iron elements and sulfur elements is reduced, and the content of the sulfur elements in waste tailings is high, which affects the sale price of building material products.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Aiming at the defects in the preselection of high-sulfur composite iron ore in the prior art, the utility model provides an efficient preselection production system of high-sulfur composite iron ore, according to the difference of physical and chemical properties of different iron ores in the iron ore, weak magnetic dry separation and XRT intelligent sorting are combined for preselection, tailings of a weak magnetic dry separator are conveyed to a vibrating feeder after passing through an XRT intelligent dry separator buffer bin, then are uniformly fed into the XRT intelligent dry separator by the vibrating feeder, the tailings subjected to weak magnetic dry separation are intelligently sorted by the XRT intelligent sorting, hematite, pyrite and a small amount of magnetite in the tailings are recovered, and gangue minerals are discarded.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

an efficient pre-selection production system for high-sulfur composite iron ore comprises a raw ore bin, a plate feeder, a jaw crusher, a middle-crushing buffer ore bin, a middle-crushing cone crusher, a screening buffer ore bin and a vibrating screen; the plate feeder is butted with a discharge port of a raw ore bin, the discharge end of the plate feeder is butted with a feed port of a jaw crusher, a product of the jaw crusher is fed into a middle-crushing buffering ore bin by an adhesive tape machine, ore in the middle-crushing buffering ore bin is fed into a middle-crushing conical crusher by the belt feeder, a crushed product of the middle-crushing conical crusher is fed into a fine crushing buffering ore bin, ore in the fine crushing buffering ore bin is fed into a vibrating screen by the adhesive tape machine, and an undersize product of the vibrating screen is a final crushed ore product and enters a main workshop for subsequent ore grinding and dressing operation; the oversize product of shale shaker is given into weak magnetism dry separation machine, the tailing of weak magnetism dry separation machine conveys to the vibrating feeder behind XRT intelligence dry separation machine buffering ore bin, evenly give into XRT intelligence dry separation machine by the vibrating feeder again, the intelligent sorting of XRT is carried out the tailing of weak magnetism dry separation to retrieve hematite, pyrite and a small amount of magnetite among them, abandon the gangue mineral, realized "can throw early throw", improve the raw ore grade of income mill, reduce the raw ore volume of income mill, practice thrift the power consumption and the material consumption of mill selection, played the effect of energy saving cost reduction.

The further technical scheme includes that the fine crushing buffer ore bin is further included, the sulfur-containing iron ore sorted by the XRT intelligent dry separator and the weak magnetic concentrate of the weak magnetic dry separator are combined to enter the fine crushing buffer ore bin, the ore in the fine crushing buffer ore bin is fed into the fine crushing cone crusher by the rubber belt feeder, the product of the fine crushing cone crusher and the product of the middle crushing cone crusher are converged and fed into the screening buffer ore bin, so that the granularity of the crushed product is-12 mm, all the crushed-70 +12mm products are effectively preselected, gangue minerals are removed in advance and can be sold as building materials, the utilization rate of solid waste resources is improved, and the sales income is increased.

In the further technical scheme, the weak magnetic dry separator is a permanent magnet, cylindrical belt type and upper ore feeding dry magnetic separator, the speed of a conveyor belt is 2.0m/s, the magnetic induction intensity of the surface of a cylinder in a separation area is 0.30T, and the particle size range of separation is-70 +12 mm; the magnetite is a strong magnetic mineral, under the action of a magnetic field of the weak magnetic dry separator, the magnetite and the intergrowth mineral thereof return to a fine crushing system as a concentrate, and the pyrite, the hematite and the gangue mineral are subjected to weak magnetic dry separation due to weak magnetic separation, so that XRT intelligent dry separation operation is performed on the tailings subjected to the weak magnetic dry separation.

According to a further technical scheme, the XRT intelligent dry separator comprises a material conveying system, the material conveying system comprises a vibration distributor and a conveying rubber belt, the conveying rubber belt runs at a constant speed, and the running speed is 3-4 m/s.

According to a further technical scheme, the XRT intelligent dry separator further comprises a detection system, an execution sorting system and a control system. The detection system comprises an X-ray source and a detector; the execution sorting system comprises an air storage tank and an air exhaust gun; the control system comprises an electric control part. After weakly magnetic dry separation tailings (-70+12mm) are uniformly fed into a conveying rubber belt by a vibrating feeder, the tailings pass through a detection area on the conveying rubber belt at a constant speed, a detection system irradiates and identifies ores one by one through an X-ray identification mechanism, a detector sends identification information to a control system, the control system completes conversion and analysis of various signals by means of a computer AI technology and then sends an action instruction to a high-speed air discharging gun of an execution system, accurate striking is carried out, and waste rocks are separated from the ores.

According to the further technical scheme, the XRT intelligent dry separator adopts an XNDT-104 intelligent separator, the width of a main conveyor belt is 1.6m, and the running speed of the conveyor belt is 3-4 m/s.

According to the further technical scheme, the XRT intelligent dry separation machine adopts high-low dual-energy X rays, the detection range of the low-energy X rays is 40-90 keV, the detection range of the high-energy X rays is 150-250 keV, each ore is detected and selected by adopting the high-low dual-energy X rays, the mFe content in waste rocks after tailing discarding can be ensured to be lower than 1%, minerals containing magnetite, hematite and pyrite are recovered, the minerals return to a main workshop in the main flow to comprehensively recover iron and sulfur, and the utilization rate of mineral resources is comprehensively improved.

According to the further technical scheme, the vibrating screen is a double-layer vibrating screen, the size of an upper-layer screen hole is 35mm, and the size of a lower-layer screen hole is 12 mm. Wherein, the undersize product of the lower screen as the final product of ore crushing enters the grinding and selecting operation of the main workshop, and the oversize product enters the weak magnetic dry separation operation.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) according to the high-efficiency preselection production system of the high-sulfur composite iron ore, according to the difference of physical and chemical properties of different iron ores in the iron ore, combined preselection is carried out by adopting weak magnetic dry separation and XRT intelligent sorting, tailings of a weak magnetic dry separator are conveyed to a vibrating feeder after passing through an XRT intelligent dry separator buffer ore bin, and are uniformly fed into the XRT intelligent dry separator by the vibrating feeder, the tailings subjected to weak magnetic dry separation are intelligently sorted by the XRT intelligent sorting, so that hematite, pyrite and a small amount of magnetite in the tailings are recovered, gangue minerals are discarded, early throwing is realized, the grade of raw ore entering grinding is improved, the raw ore entering amount is reduced, the power consumption and the material consumption of grinding are saved, and the effects of saving energy and reducing cost are achieved;

(2) according to the efficient preselection production system for the high-sulfur composite iron ore, the sulfur-containing iron ore subjected to dry separation by the XRT intelligent dry separator and the weak magnetic concentrate of the weak magnetic dry separator are combined and enter the fine crushing buffer ore bin, the ore in the fine crushing buffer ore bin is fed into the fine crushing cone crusher by the rubber belt feeder, the product of the fine crushing cone crusher and the product of the middle crushing cone crusher are converged and fed into the screening buffer ore bin, so that the granularity of the crushed product is ensured to be-12 mm, and all the crushed-70 +12mm products are effectively preselected, so that gangue minerals are removed in advance and can be sold as building materials, the utilization rate of solid waste resources is improved, and the sales income is increased;

(3) according to the high-efficiency preselection production system of the high-sulfur composite iron ore, after weak magnetic dry separation tailings are uniformly fed into a conveying rubber belt by a vibrating feeder and pass through a detection area at a constant speed, the detection system irradiates and identifies ores one by one through an X-ray identification mechanism, a detector sends identification information to a control system, the control system completes conversion and analysis of various signals by means of a computer AI technology and then sends an action instruction to a high-speed gas discharge gun of an execution system, and waste stones are separated from the ores by accurate striking;

(4) according to the efficient pre-selection production system for the high-sulfur composite iron ore, the XRT intelligent dry separation machine adopts high-low dual-energy X-rays to detect and select each ore, so that mFe content in waste rocks after being thrown is lower than 1%, minerals containing magnetite, hematite and pyrite are recycled and returned to a main process to enter a main workshop to comprehensively recover iron and sulfur, and the utilization rate of mineral resources is comprehensively improved;

(5) according to the efficient pre-selection production system for the high-sulfur composite iron ore, the vibrating screen is a double-layer vibrating screen made of rubber to ensure a high screening effect, undersize products of a lower-layer screen mesh are used as final products of ore crushing to enter a main workshop grinding operation, and oversize products enter a weak magnetic dry separation operation.

Drawings

FIG. 1 is a schematic view showing the operation state of the high-efficiency preliminary separation production system of high-sulfur composite iron ore according to the present invention.

In the figure: 1-raw ore bin; 2-a plate feeder; 3-a jaw crusher; 4-middle crushing buffer ore bin; 5-a medium crushing cone crusher; 6-screening the buffer ore bin; 7-vibrating screen; 8-weak magnetic dry separation machine; buffering ore bins of a 9-XRT intelligent dry separator; 10-a vibrating feeder; 11-XRT intelligent dry separator; 12-fine crushing buffer ore bin; 13-fine crushing cone crusher.

Detailed Description

For a further understanding of the utility model, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

Example 1

The high-efficiency preselection production system of the high-sulfur composite iron ore of the embodiment, as shown in fig. 1, comprises a raw ore bin 1, a plate feeder 2, a jaw crusher 3, a middle crushing buffer ore bin 4, a middle crushing cone crusher 5, a screening buffer ore bin 6 and a vibrating screen 7; the plate feeder 2 is butted with a discharge port of the raw ore bin 1, the discharge end of the plate feeder 2 is butted with a feed port of the jaw crusher 3, a product of the jaw crusher 3 is fed into the middle crushing buffer ore bin 4 by an adhesive tape machine, ore in the middle crushing buffer ore bin 4 is fed into the middle crushing cone crusher 5 by a belt feeder, the maximum feeding granularity of raw ore is less than 1000mm, and the minimum ore discharge port of the tight edge of the jaw crusher 3 is adjusted to control the ore discharge granularity of the jaw crusher 3 to be not more than 300 mm; the tight-edge ore discharge port of the medium crushing cone crusher 5 is adjusted to control the ore discharge granularity to be not more than 70 mm; feeding the crushed product of the medium crushing cone crusher 5 into a fine crushing buffering ore bin 12, feeding the ore of the fine crushing buffering ore bin 12 into a vibrating screen 7 by an adhesive tape machine, and feeding the undersize product of the vibrating screen 7 which is the final crushed ore product into a main workshop for subsequent ore grinding and ore dressing operation; the oversize product of the vibrating screen 7 is fed into the weak magnetic dry separator 8, the tailings of the weak magnetic dry separator 8 are conveyed to the vibrating feeder 10 after passing through the XRT intelligent dry separator buffer ore bin 9, and then are uniformly fed into the XRT intelligent dry separator 11 by the vibrating feeder 10, the intelligent dry separation is carried out on the tailings subjected to the weak magnetic dry separation by adopting the XRT intelligent dry separation, so that hematite, pyrite and a small amount of magnetite in the tailings are recovered, gangue minerals are discarded, the ' throwing early throwing ' is realized ', the raw ore grade of grinding is improved, the raw ore quantity of grinding is reduced, the power consumption and the material consumption of grinding separation are saved, and the effects of saving energy and reducing cost are achieved.

In the embodiment, the weak magnetic dry separation and high-low dual-energy XRT intelligent dry separation are combined, so that the advantages of large equipment handling capacity (the maximum handling capacity can reach 1000 t/h.) of the weak magnetic dry separation single machine and high magnetite separation efficiency are fully utilized; and the volume of magnetite that weak magnetism dry separation was retrieved accounts for the ratio high, and the volume of throwing the tail accounts for the ratio low, can adopt less XRT intelligent dry separation equipment to handle (XRT intelligent dry separation equipment unit handling capacity is little, 50 ~ 80t/h. Compared with the single XRT intelligent dry separation system (note: the high-low dual-energy XRT intelligent dry separation system can separate magnetite, hematite and pyrite from gangue minerals, but has larger equipment investment for large-scale metallurgical mines), the investment of the whole preselection system is lower. The pre-selection production system is suitable for the ore dressing of high-sulfur compound iron ore with the TFe grade of the raw ore of more than 25 percent, the magnetic iron occupancy of more than 65 percent, the iron mineral mainly comprising magnetite, hematite and pyrite and the S content of 4 to 10 percent.

Further, the vibrating screen 7 is a double-layer vibrating screen 7, the size of the upper-layer screen hole is 35mm, and the size of the lower-layer screen hole is 12 mm. Wherein, the undersize product of the lower screen as the final product of ore crushing enters the grinding and selecting operation of the main workshop, and the oversize product enters the weak magnetic dry separation operation.

Example 2

The basic structure of the high-efficiency pre-selection production system of the high-sulfur composite iron ore of the embodiment is the same as that of the embodiment 1, and the differences and the improvements are that: as shown in fig. 1, the mineral processing system further comprises a fine crushing buffer ore bin 12, the sulfur-containing iron ore sorted by the XRT intelligent dry separator 11 and the weak magnetic concentrate of the weak magnetic dry separator 8 are combined and enter the fine crushing buffer ore bin 12, the ore in the fine crushing buffer ore bin 12 is fed into the fine crushing cone crusher 13 by a tape feeder, the product of the fine crushing cone crusher 13 and the product of the middle crushing cone crusher 5 are merged and fed into the screening buffer ore bin 6, wherein the tight edge ore discharge port of the fine crushing cone crusher 13 is preferably adjusted to be not more than 19mm, the entry granularity of the weak magnetic dry separation and the XRT intelligent dry separation is-70 +12mm, so as to ensure that the granularity of the crushed product is-12 mm, all the crushed-70 +12mm products are effectively preselected, and therefore, gangue minerals are removed in advance and can be sold as building materials, the utilization rate of solid waste resources is improved, and the sales income is increased.

In the embodiment, the weak magnetic dry separator 8 is a permanent magnet, cylindrical belt type and upper ore feeding dry magnetic separator, the speed of a conveyor belt is 2.0m/s, the magnetic induction intensity of the surface of a cylinder in a separation area is 0.30T, and the particle size range of separation is-70 +12 mm; the magnetite is a strong magnetic mineral, under the action of a magnetic field of the weak magnetic dry separator, the magnetite and the intergrowth mineral thereof return to a fine crushing system as a concentrate, and the pyrite, the hematite and the gangue mineral are subjected to weak magnetic dry separation due to weak magnetic separation, so that XRT intelligent dry separation operation is performed on the tailings subjected to the weak magnetic dry separation.

The XRT intelligent dry separator 11 comprises a material conveying system, wherein the material conveying system comprises a vibration distributor and a conveying rubber belt, the conveying rubber belt runs at a constant speed, and the running speed is 3-4 m/s. The XRT intelligent dry separator 11 further comprises a detection system, an execution sorting system and a control system. The detection system comprises an X-ray source and a detector; the execution sorting system comprises an air storage tank and an air exhaust gun; the control system comprises an electric control part. After weakly magnetic dry separation tailings (-70+12mm) are uniformly fed into a conveying rubber belt by a vibrating feeder, the tailings pass through a detection area on the conveying rubber belt at a constant speed, a detection system irradiates and identifies ores one by one through an X-ray identification mechanism, a detector sends identification information to a control system, the control system completes conversion and analysis of various signals by means of a computer AI technology and then sends an action instruction to a high-speed air discharging gun of an execution system, accurate striking is carried out, and waste rocks are separated from the ores.

Furthermore, the XRT intelligent dry separator 11 adopts an XNDT-104 intelligent separator, the width of a main conveyor belt is 1.6m, and the running speed of the conveyor belt is 3-4 m/s. XRT intelligence dry separation machine 11 adopts high low dual energy X ray, and its low energy X ray detection range is 40 ~ 90keV, and high energy X ray detection range is 150 ~ 250keV, adopts high low dual energy X ray to detect every ore and select, can ensure that mFe content is less than 1% in the barren rock of throwing the tail, has retrieved the mineral that contains magnetite, hematite and pyrite and has returned and get into the main building in the mainstream and synthesize recovery iron, sulphur, has synthesized the utilization ratio that has improved the mineral resources.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims (8)

1. The high-efficiency preselection production system of the high-sulfur composite iron ore is characterized in that: comprises a raw ore bin (1), a plate feeder (2), a jaw crusher (3), a middle crushing buffer ore bin (4), a middle crushing cone crusher (5), a screening buffer ore bin (6) and a vibrating screen (7); the plate feeder (2) is in butt joint with a discharge port of the raw ore bin (1), a discharge end of the plate feeder (2) is in butt joint with a feed port of the jaw crusher (3), a product of the jaw crusher (3) is fed into the middle-crushing buffering ore bin (4) through a belt conveyor, an ore of the middle-crushing buffering ore bin (4) is fed into the middle-crushing cone crusher (5) through the belt feeder, a crushed product of the middle-crushing cone crusher (5) is fed into the fine crushing buffering ore bin (12), an ore of the fine crushing buffering ore bin (12) is fed into the vibrating screen (7) through the belt conveyor, and an undersize product of the vibrating screen (7) is a final crushed ore product and enters a main workshop for subsequent ore grinding and mineral separation operation; products on a screen of the vibrating screen (7) are fed into the weak magnetic dry separator (8), tailings of the weak magnetic dry separator (8) are conveyed to the vibrating feeder (10) after passing through the XRT intelligent dry separator buffering ore bin (9), and then are uniformly fed into the XRT intelligent dry separator (11) through the vibrating feeder (10).

2. The high-efficiency pre-selection production system of the high-sulfur composite iron ore according to claim 1, characterized in that: the iron ore screening device is characterized by further comprising a fine crushing buffer ore bin (12), the sulfur-containing iron ore sorted by the XRT intelligent dry separator (11) and the weak magnetic concentrate of the weak magnetic dry separator (8) are combined to enter the fine crushing buffer ore bin (12), the ore of the fine crushing buffer ore bin (12) is fed into a fine crushing cone crusher (13) through a rubber belt feeder, and the product of the fine crushing cone crusher (13) and the product of the middle crushing cone crusher (5) are converged and fed into the screening buffer ore bin (6).

3. The high-efficiency pre-selection production system of the high-sulfur composite iron ore according to claim 2, characterized in that: the weak magnetic dry separator (8) is a permanent magnetic, cylindrical belt type, upper ore feeding dry magnetic separator, the speed of a conveyor belt is 2.0m/s, the magnetic induction intensity of the surface of a cylinder in a separation area is 0.30T, and the particle size range of separation is-70 +12 mm.

4. The high-efficiency pre-selection production system of the high-sulfur composite iron ore according to claim 2, characterized in that: the XRT intelligent dry separator (11) comprises a material conveying system, wherein the material conveying system comprises a vibrating distributor and a conveying rubber belt, and the conveying rubber belt runs at a constant speed.

5. The high-efficiency pre-selection production system of the high-sulfur composite iron ore according to claim 4, characterized in that: the XRT intelligent dry separator (11) further comprises a detection system, an execution sorting system and a control system.

6. The high-efficiency pre-selection production system of the high-sulfur composite iron ore according to claim 5, characterized in that: the XRT intelligent dry separator (11) adopts an XNDT-104 intelligent separator, the width of a main conveyor belt is 1.6m, and the running speed of the conveyor belt is 3-4 m/s.

7. The high-efficiency pre-selection production system of the high-sulfur composite iron ore according to claim 6, characterized in that: the XRT intelligent dry separator (11) adopts high-low dual-energy X-rays, the detection range of the low-energy X-rays is 40-90 keV, and the detection range of the high-energy X-rays is 150-250 keV.

8. The high-efficiency pre-selection production system of the high-sulfur composite iron ore according to claim 1, characterized in that: the vibrating screen (7) is a double-layer vibrating screen (7), the size of the upper-layer sieve hole is 35mm, and the size of the lower-layer sieve hole is 12 mm.

Images