Iron-containing material magnetic separation device and roasting integrated unit and system

Abstract

An iron-containing material magnetic separation device comprises a shell, a primary magnetic separation channel and a secondary magnetic separation area. The primary magnetic separation channel is vertically arranged in the shell, and a material inlet is formed in the bottom of the primary magnetic separation channel. A first concentrate outlet is formed in one side of the upper portion of the primary magnetic separation channel, and a first tailing outlet is formed in the other side or the top of the primary magnetic separation channel. And a first magnetic pole opposite to the first concentrate outlet is arranged outside the primary magnetic separation channel. And the secondary magnetic separation area is arranged on one side of the primary magnetic separation channel and is communicated with the primary magnetic separation channel. A second magnetic pole is arranged at the upper part of the secondary magnetic separation area. A vertical baffle is arranged on the lower portion of the secondary magnetic separation area and divides the lower portion of the secondary magnetic separation area into a secondary tailing collecting area and a secondary concentrate collecting area. Through two times of magnetic separation, the situation that a small part of non-magnetic materials enter the first concentrate outlet due to only one time of magnetic separation, and the purity of the magnetic materials is reduced is avoided, the purity of the obtained magnetic materials is high, and efficient utilization of iron-containing material resources is achieved.

Description

Technical Field

[0001] The utility model relates to a magnetic separation device for iron-containing materials, in particular to a magnetic separation device for iron-containing materials, a roasting integrated unit and a system, belonging to the technical field of iron and steel smelting. Background Technique

[0002] Pyrrhotite Fe 1-x S(0 < x < 0.223) is a sulfide mineral of iron, which is abundant in nature and mostly exists in an associated form. Its surface is dark bronze-yellow, and its magnetic strength varies. The strength of its magnetic force depends on the number of vacancies of iron atoms inside the structure. Generally, it can be recovered by magnetic separation. The composition of pyrrhotite is relatively complex and is usually intermingled with magnetic materials (such as iron, copper, and nickel). There is almost no pyrrhotite mineral with a single crystal system in nature, and more than 70% are mixed crystal systems. Therefore, it is very difficult to separate it by a single separation method. Since part of the Fe 2+ is replaced by Fe 3+ in order to maintain the electrovalence balance, vacancies appear at the Fe 2+ position to form an empty solid solution. Due to the different arrangements of lattice vacancies, pyrrhotite forms many structures, and hexagonal hpo and monoclinic mpo are two common types. Due to the defects in the crystal structure of pyrrhotite, in the presence of oxidants such as oxygen or ferric ions, it is more easily oxidized than other sulfide minerals, which is not conducive to flotation. Currently, wet magnetic separation is mainly used to enrich pyrrhotite. The obtained pyrrhotite concentrate enters the fluidized bed roasting system for preparing sulfuric acid products after filtration and drying, and the by-product is sulfuric acid residue.

[0003] Fluidization refers to the state in which solid particles present a fluid state under the action of a fluid medium. The fluidization process endows the material with characteristics similar to those of a liquid. As early as the 1950s and 1960s of the 20th century, domestic and foreign scientific research workers highly regarded fluidized bed roasting technology, and research has been carried out in countries such as the United States, the United Kingdom, Canada, Italy, and Russia. However, in recent years, foreign countries have basically stopped developing complex and refractory iron ores, and there are few research reports on fluidized bed roasting.

[0004] Many domestic scientific research institutions have carried out a large number of studies on fluidized roasting equipment and technologies. Changsha Institute of Mining and Metallurgy has carried out fluidized magnetization roasting studies on dozens of iron ores. For the limonite mixed ore with an original ore grade of 32.52%, by using the flash magnetization roasting complete set of technologies and equipment, advanced technical indicators of an iron concentrate grade of 57.52% and an iron recovery rate of 90.24% can be obtained in industrial production, opening up a new way for the development and utilization of complex refractory iron ores in China. The Institute of Process Engineering, Chinese Academy of Sciences uses a fluidized bed reactor as the magnetization roasting device. The results show that for the ore powder without pretreatment, by using magnetization roasting - magnetic separation, the iron grade in the concentrate can be increased to about 55%, and the iron recovery rate is <70%; for the pretreated ore powder, the iron grade in the concentrate can be increased to 60.18%, and the iron recovery rate reaches 85.91%. The pretreated ore powder forms a porous and loose structure, making it easy for the reducing gas to enter the interior of the iron ore particles, which is beneficial to the formation of Fe3O4 and improves the magnetic separation index.

[0005] The chemical formula of pyrrhotite is Fe 1-x S(0 < x < 0.223), which has conductivity and magnetism. At present, the method of wet magnetic separation + high-temperature oxidation roasting is mainly used to prepare sulfuric acid products, and the by-product is sulfuric acid slag. However, the water consumption of wet magnetic separation is large, and the obtained magnetic separation concentrate needs to be filtered and dried before it can become a qualified raw material for the high-temperature roasting process. The process is long, the energy consumption is high, and the investment is large, seriously affecting the efficient utilization of pyrrhotite resources. In addition, the existing magnetization roasting process is two independent steps, the process flow is relatively complex, and there is a transfer process. Summary of the Invention

[0006] Aiming at the problems existing in the prior art that magnetic iron-containing materials such as pyrrhotite cannot be efficiently utilized, the water consumption of current wet magnetic separation is large, regular maintenance is required, coarse-grained gangue cannot be discharged, and the overall process flow of pyrrhotite magnetic separation, filtration, drying, and roasting is complex, etc., the present invention proposes an integrated device and system for separating and roasting iron-containing materials.

[0007] According to the first embodiment of the present invention, a magnetic separation device for iron-containing materials is provided.

[0008] A magnetic separation device for iron-containing materials, the device includes a housing, a primary magnetic separation channel, and a secondary magnetic separation area.

[0009] The primary magnetic separation channel is vertically arranged inside the housing, and a material inlet is provided at the bottom of the primary magnetic separation channel. A first concentrate outlet is provided on one side of the upper part of the primary magnetic separation channel, and a first tailing outlet is provided on the other side or the top of the upper part of the primary magnetic separation channel. A first magnetic pole is arranged outside the primary magnetic separation channel, and the first magnetic pole is oppositely arranged with the first concentrate outlet.

[0010] The secondary magnetic separation area is arranged in parallel on one side of the primary magnetic separation channel and is connected to the inside of the primary magnetic separation channel through a first concentrate outlet. A second magnetic pole is arranged at the upper part of the inner cavity of the secondary magnetic separation area. A vertical baffle is arranged at the lower part of the secondary magnetic separation area. The lower part of the secondary magnetic separation area is separated into a secondary tailing collection area close to the primary magnetic separation channel and a secondary concentrate collection area far from the primary magnetic separation channel by the vertical baffle. A second tailing outlet is arranged at the lower part of the secondary tailing collection area. A second concentrate outlet is arranged at the lower part of the secondary concentrate collection area.

[0011] Preferably, the device includes a plurality of the second magnetic poles, and the plurality of second magnetic poles are uniformly distributed in the upper part of the secondary magnetic separation area along the direction from the secondary tailing collection area to the secondary concentrate collection area.

[0012] Preferably, the plurality of the second magnetic poles are horizontally arranged in the upper part of the secondary magnetic separation area.

[0013] Preferably, along the direction from the secondary tailing collection area to the secondary concentrate collection area, the plurality of the second magnetic poles are obliquely arranged with gradually decreasing height.

[0014] Preferably, among the plurality of the second magnetic poles, the magnetism of the second magnetic pole gradually weakens in the direction away from the first concentrate outlet.

[0015] Preferably, the first magnetic pole and / or the second magnetic pole is an electromagnet.

[0016] Preferably, the device further includes a partition plate and a guide plate. The partition plate is vertically arranged between the outer side wall of the primary magnetic separation channel and the second magnetic pole. One end of the guide plate is connected to the outer side wall of the primary magnetic separation channel, and the other end extends horizontally or downward in the direction away from the primary magnetic separation channel. The partition plate, the guide plate and the outer side wall of the primary magnetic separation channel together form a secondary magnetic separation channel. Preferably, the shape of the partition plate is the same as the arrangement shape of the plurality of the second magnetic poles.

[0017] Preferably, the included angle between the vertical baffle and the vertical direction is 0 to 45°, preferably 0 to 30°.

[0018] Preferably, the vertical baffle can move horizontally. As a preference, the vertical baffle is connected to the inner side wall of the housing through a slide rail.

[0019] Preferably, the device further includes a first sieve plate. The first sieve plate is arranged above the secondary tailing collection area and / or the secondary concentrate collection area. One end of the first sieve plate is connected to the outer side wall of the primary magnetic separation channel, and the other end is connected to the inner side wall of the housing. The aperture of the sieve holes of the first sieve plate is 1 to 5 mm, preferably 1 to 3 mm. Preferably, the first sieve plate is obliquely arranged, and the end connected to the housing is lower. Preferably, a discharge port is arranged at the connection between the housing and the first sieve plate.

[0020] Preferably, the device further comprises a second sieve plate. The second sieve plate is arranged at the first concentrate outlet and / or the first tailings outlet. Preferably, the sieve hole diameter of the second sieve plate is 1 to 5 mm, more preferably 1 to 3 mm.

[0021] Preferably, the device further comprises a first tailing channel, which is arranged outside the first tailing outlet, one end of the first tailing channel is connected to the first tailing outlet, and the other end is connected to the external negative pressure exhaust unit.

[0022] According to a second embodiment of the present invention, an integrated unit for magnetic separation and roasting of iron-containing materials is provided.

[0023] An integrated unit for magnetic separation and roasting of ferrous materials includes a ferrous material magnetic separation device, a transmission channel, and a roasting device. One end of the transmission channel is connected to the second concentrate outlet of the ferrous material separation device, and the other end is connected to the feed inlet of the roasting device.

[0024] According to a third embodiment of the present invention, a system for separating and roasting iron-containing materials is provided.

[0025] A system for separating and roasting iron-containing materials includes an integrated magnetic separation and roasting unit for iron-containing materials, a grinding device, a screening device, an inert gas source, and an oxidizing gas source. The grinding device's discharge port is connected to the screening device's feed port via a pipeline. The screening device's discharge port is connected to a material inlet 201 via a pipeline. The inert gas source is connected to the material inlet 201 via a pipeline. The oxidizing gas source is connected to the oxidizing gas inlet via a pipeline.

[0026] Preferably, the sieve hole diameter of the screening device is 0.01 to 1 mm, preferably 0.1 to 0.5 mm.

[0027] Preferably, the system further comprises a tailings collecting device, wherein the tailings collecting device is in communication with the first tailings outlet 203 and the second tailings outlet 304 .

[0028] In the present utility model, a primary magnetic separation channel and a secondary magnetic separation area are arranged inside the housing. After the material enters the primary magnetic separation channel from the material inlet at the bottom of the primary magnetic separation channel, it moves upward under the pushing action of the inert gas flow. Under the action of the first magnetic pole, the magnetic material is discharged from the primary magnetic separation channel through the first concentrate outlet, and most of the non-magnetic material is discharged from the first tailing outlet. Since part of the gas will be discharged from the first concentrate outlet, a small part of the non-magnetic material will be carried out, resulting in a decrease in the purity of the magnetic material and affecting the quality of the final product. Therefore, the present utility model provides a secondary magnetic separation area, and a second magnetic pole is arranged at the upper part of the secondary magnetic separation area, and a vertical baffle is arranged at the lower part. After the magnetic material and a small part of the non-magnetic material enter the secondary magnetic separation area from the first concentrate outlet, the non-magnetic material is affected by gravity and falls into the secondary tailing collection area near the primary magnetic separation channel, while the magnetic material is affected by magnetic force and gravity and continues to move forward and falls into the secondary concentrate collection area far from the primary magnetic separation channel. Finally, the purpose of basically separating the non-magnetic material is achieved, high-purity magnetic material is obtained, and the quality of the final product is improved.

[0029] In the present utility model, a plurality of second magnetic poles (which can be 2 to 100) are arranged at the upper part of the secondary magnetic separation area to further enhance the separation effect between the magnetic material and the non-magnetic material. Preferably, the second magnetic poles can be horizontally arranged at the upper part of the secondary magnetic separation area (as Figure 1 shown), or along the direction from the secondary tailing collection area to the secondary concentrate collection area, the height of the second magnetic poles gradually decreases (as Figure 2 , 3 shown). Both of the above two methods can enable the magnetic material to continuously receive an upward adsorption force during the movement in the direction away from the first concentrate outlet, thereby strengthening the separation effect of magnetic separation. Further preferably, in the direction away from the first concentrate outlet, the magnetism of the plurality of second magnets gradually weakens, so that after the magnetic material and the non-magnetic material are fully separated, the falling speed of the magnetic material is accelerated, and the magnetic separation efficiency is improved.

[0030] In the present utility model, a partition plate and a diversion plate are arranged in the secondary magnetic separation area. Since the magnetic material entering the secondary magnetic separation area may carry more fine dust, the present utility model uses the partition plate to separate the magnetic material entering the secondary magnetic separation area from the second magnetic pole, avoiding dust adsorption on the second magnetic pole. At the same time, the partition plate can also form a secondary magnetic separation channel with the diversion plate and the outer side wall of the primary magnetic separation channel, so that the magnetic material and the non-magnetic material entering the secondary magnetic separation area have an initial velocity in the horizontal direction, which is convenient for the magnetic separation of the second magnetic pole.

[0031] In the present utility model, the vertical baffle can move horizontally to adapt to various working conditions such as the particle size of the magnetic material, the change of the horizontal initial velocity of the material, and the change of the magnetism of the magnetic pole.

[0032] In the present utility model, a first sieve plate and / or a second sieve plate are provided to prevent the influence of the excessive particle sizes of magnetic materials and non-magnetic materials on the secondary magnetic separation and subsequent processes.

[0033] In the present utility model, a first tailing channel is provided at the first tailing outlet, and a negative pressure air extraction unit connected to the first tailing channel is provided to introduce most of the gas in the primary magnetic separation channel into the first tailing channel, thereby reducing the quantity of non-magnetic materials discharged from the first concentrate outlet and reducing the burden of the secondary magnetic separation.

[0034] In the present utility model, an integrated unit for magnetic separation and roasting of iron-containing materials is further provided. The magnetic materials separated by magnetic separation are directly introduced into the roasting device. Since the magnetic materials obtained after magnetic separation by this device do not need to be screened and dried again, the intermediate processes are reduced, the overall utilization efficiency of the iron-containing materials is improved, and the efficient utilization of the iron-containing material resources is realized.

[0035] Compared with the prior art, the present utility model has the following beneficial effects:

[0036] 1. The magnetic separation device for iron-containing materials provided by the present utility model is provided with a primary magnetic separation channel and a secondary magnetic separation area. Through two magnetic separations, the situation that a small part of non-magnetic materials enter the first concentrate outlet due to only one magnetic separation, resulting in a decrease in the purity of the magnetic materials, is avoided. The obtained magnetic materials have high purity, and the efficient utilization of the iron-containing material resources is realized.

[0037] 2. The integrated unit and system for magnetic separation and roasting of iron-containing materials provided by the present utility model can realize the integration of magnetic separation and roasting of magnetic materials, avoid the intermediate screening and drying processes, improve the overall utilization efficiency of the iron-containing materials, streamline the process flow, and realize cost reduction and efficiency increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 FIG. 1 is a first schematic structural diagram of a magnetic separation device for iron-containing materials provided by the present utility model.

[0039] Figure 2 FIG. 2 is a second schematic structural diagram of a magnetic separation device for iron-containing materials provided by the present utility model.

[0040] Figure 3 FIG. 3 is a third schematic structural diagram of a magnetic separation device for iron-containing materials provided by the present utility model.

[0041] Reference Numerals: 1: housing; 2: primary magnetic separation channel; 201: material inlet; 202: first concentrate outlet; 203: first tailing outlet; 204: first magnetic pole; 3: secondary magnetic separation area; 301: vertical baffle; 302: secondary tailing collection area; 303: secondary concentrate collection area; 304: second tailing outlet; 305: second concentrate outlet; 306: second magnetic pole; 307: partition; 308: deflector; 309: secondary magnetic separation channel; 4: first sieve plate; 5: discharge port; 6: second sieve plate; 7: first tailing channel. Detailed Embodiment

[0042] The technical solutions of the present invention will be illustrated by way of example below. The scope of protection claimed by the present invention includes but is not limited to the following embodiments.

[0043] According to the first embodiment of the present invention, a magnetic separation device for iron-containing materials is provided.

[0044] A magnetic separation device for iron-containing materials, the device comprising a housing 1, a primary magnetic separation channel 2 and a secondary magnetic separation area 3.

[0045] The primary magnetic separation channel 2 is vertically arranged inside the housing 1 and a material inlet 201 is provided at the bottom of the primary magnetic separation channel 2. A first concentrate outlet 202 is provided on one side of the upper part of the primary magnetic separation channel 2, and a first tailing outlet 203 is provided on the other side or the top of the upper part of the primary magnetic separation channel 2. A first magnetic pole 204 is arranged outside the primary magnetic separation channel 2, and the first magnetic pole 204 is arranged opposite to the first concentrate outlet 202.

[0046] The secondary magnetic separation area 3 is arranged side by side with the primary magnetic separation channel 2 and is connected to the inside of the primary magnetic separation channel 2 through the first concentrate outlet 202. A second magnetic pole 306 is arranged in the upper part of the inner cavity of the secondary magnetic separation area 3. A vertical baffle 301 is arranged in the lower part of the secondary magnetic separation area 3, and the lower part of the secondary magnetic separation area 3 is separated into a secondary tailing collection area 302 close to the primary magnetic separation channel 2 and a secondary concentrate collection area 303 far from the primary magnetic separation channel 2 by the vertical baffle 301. A second tailing outlet 304 is provided in the lower part of the secondary tailing collection area 302. A second concentrate outlet 305 is provided in the lower part of the secondary concentrate collection area 303.

[0047] Preferably, the device includes a plurality of the second magnetic poles 306, and the plurality of second magnetic poles 306 are evenly distributed in the upper part of the secondary magnetic separation area 3 along the direction from the secondary tailing collection area 302 to the secondary concentrate collection area 303.

[0048] Preferably, the plurality of second magnetic poles 306 are horizontally arranged in the upper part of the secondary magnetic separation area 3.

[0049] Preferably, in the direction from the secondary tailing collection area 302 to the secondary concentrate collection area 303, the plurality of second magnetic poles 306 are obliquely arranged with gradually decreasing height.

[0050] Preferably, among the plurality of second magnetic poles 306, the magnetism of the second magnetic pole 306 gradually weakens in the direction away from the first concentrate outlet 202.

[0051] Preferably, the first magnetic pole 204 and / or the second magnetic pole 306 is an electromagnet.

[0052] Preferably, the device further includes a partition plate 307 and a diversion plate 308. The partition plate 307 is vertically arranged between the outer side wall of the primary magnetic separation channel 2 and the second magnetic pole 306. One end of the diversion plate 308 is connected to the outer side wall of the primary magnetic separation channel 2, and the other end extends horizontally or downward in a direction away from the primary magnetic separation channel 2. The partition plate 307, the diversion plate 308 and the outer side wall of the primary magnetic separation channel 2 together form a secondary magnetic separation channel 309. Preferably, the shape of the partition plate 307 is the same as the arrangement shape of the plurality of second magnetic poles.

[0053] Preferably, the angle between the vertical baffle 301 and the vertical direction is 0 to 45°, preferably 0 to 30°.

[0054] Preferably, the vertical baffle 301 can move horizontally. As a preference, the vertical baffle 301 is connected to the inner side wall of the housing 1 through a slide rail.

[0055] Preferably, the device further includes a first sieve plate 4. The first sieve plate 4 is arranged above the secondary tailing collection area 302 and / or the secondary concentrate collection area 303. One end of the first sieve plate 4 is connected to the outer side wall of the primary magnetic separation channel 2, and the other end is connected to the inner side wall of the housing 1. The aperture of the sieve holes of the first sieve plate 4 is 1 to 5 mm, preferably 1 to 3 mm. Preferably, the first sieve plate 4 is obliquely arranged, and the end connected to the housing 1 is lower. Preferably, a discharge port 5 is provided at the connection between the housing 1 and the first sieve plate 4.

[0056] Preferably, the device further includes a second sieve plate 6. The second sieve plate 6 is arranged at the first concentrate outlet 202 and / or the first tailing outlet 203. Preferably, the aperture of the sieve holes of the second sieve plate 6 is 1 to 5 mm, preferably 1 to 3 mm.

[0057] Preferably, the device further includes a first tailing channel 7. The first tailing channel 7 is arranged outside the first tailing outlet 203. One end of the first tailing channel 7 is connected to the first tailing outlet 203, and the other end is communicated with an external negative pressure air extraction unit.

[0058] According to the second embodiment of the present invention, a magnetically separated roasting integrated unit for iron-containing materials is provided.

[0059] An integrated magnetic separation and roasting unit for iron-containing materials. The device includes an iron-containing material magnetic separation device, a transfer channel, and a roasting device. One end of the transfer channel is connected to the second concentrate outlet 305 of the iron-containing material separation device, and the other end is connected to the feed inlet of the roasting device.

[0060] According to the third embodiment of the present utility model, an iron-containing material separation and roasting system is provided.

[0061] An iron-containing material separation and roasting system. The system includes an integrated magnetic separation and roasting unit for iron-containing materials, a grinding device, a screening device, an inert gas source, and an oxidizing gas source. The discharge port of the grinding device is connected to the feed inlet of the screening device through a pipeline. The discharge port of the screening device is connected to the material inlet 201 through a pipeline. The inert gas source is connected to the material inlet 201 through a pipeline. The oxidizing gas source is connected to the oxidizing gas inlet through a pipeline.

[0062] Preferably, the screen hole diameter of the screening device is 0.01 - 1 mm, preferably 0.1 - 0.5 mm.

[0063] Preferably, the system further includes a tailing collection device, and the tailing collection device is connected to the first tailing outlet 203 and the second tailing outlet 304.

[0064] Example 1

[0065] An iron-containing material magnetic separation device. The device includes a housing 1, a primary magnetic separation channel 2, and a secondary magnetic separation area 3.

[0066] The primary magnetic separation channel 2 is vertically arranged inside the housing 1, and a material inlet 201 is provided at the bottom of the primary magnetic separation channel 2. A first concentrate outlet 202 is provided on one side of the upper part of the primary magnetic separation channel 2, and a first tailing outlet 203 is provided on the other side of the upper part of the primary magnetic separation channel 2. A first magnetic pole 204 is arranged outside the primary magnetic separation channel 2, and the first magnetic pole 204 is arranged opposite to the first concentrate outlet 202.

[0067] The secondary magnetic separation area 3 is arranged in parallel on one side of the primary magnetic separation channel 2 and is connected to the inside of the primary magnetic separation channel 2 through the first concentrate outlet 202. A second magnetic pole 306 is arranged in the upper part of the inner cavity of the secondary magnetic separation area 3. A vertical baffle 301 is arranged in the lower part of the secondary magnetic separation area 3. The lower part of the secondary magnetic separation area 3 is divided into a secondary tailing collection area 302 close to the primary magnetic separation channel 2 and a secondary concentrate collection area 303 far from the primary magnetic separation channel 2 by the vertical baffle 301. A second tailing outlet 304 is provided in the lower part of the secondary tailing collection area 302. A second concentrate outlet 305 is provided in the lower part of the secondary concentrate collection area 303.

[0068] Example 2

[0069] Repeat Example 1, except that the device includes 5 of the second magnetic poles 306, and the 5 second magnetic poles 306 are evenly distributed along the direction from the secondary tailing collection area 302 to the secondary concentrate collection area 3 in the upper part of the secondary magnetic separation area 3.

[0070] Example 3

[0071] Repeat Example 2, except that the 5 second magnetic poles 306 are horizontally arranged in the upper part of the secondary magnetic separation area 3.

[0072] Example 4

[0073] Repeat Example 2, except that along the direction from the secondary tailing collection area 302 to the secondary concentrate collection area 3, the 5 second magnetic poles 306 are obliquely arranged with gradually decreasing height.

[0074] Example 5

[0075] Repeat Example 4, except that among the 5 second magnetic poles 306, the magnetism of the second magnetic poles 306 gradually weakens in the direction away from the first concentrate outlet 202.

[0076] The first magnetic pole 204 and the second magnetic pole 306 are electromagnets.

[0077] Example 6

[0078] Repeat Example 5, except that the device further includes a partition plate 307 and a diversion plate 308. The partition plate 307 is vertically arranged between the outer sidewall of the primary magnetic separation channel 2 and the second magnetic pole 306. One end of the diversion plate 308 is connected to the outer sidewall of the primary magnetic separation channel 2, and the other end extends horizontally in the direction away from the primary magnetic separation channel 2. The partition plate 307, the diversion plate 308 and the outer sidewall of the primary magnetic separation channel 2 together form a secondary magnetic separation channel 309. The shape of the partition plate 307 is the same as the arrangement shape of the 5 second magnetic poles.

[0079] Example 7

[0080] Repeat Example 5, except that the device further includes a partition plate 307 and a diversion plate 308. The partition plate 307 is vertically arranged between the outer sidewall of the primary magnetic separation channel 2 and the second magnetic pole 306. One end of the diversion plate 308 is connected to the outer sidewall of the primary magnetic separation channel 2, and the other end extends downward in the direction away from the primary magnetic separation channel 2. The partition plate 307, the diversion plate 308 and the outer sidewall of the primary magnetic separation channel 2 together form a secondary magnetic separation channel 309. The shape of the partition plate 307 is the same as the arrangement shape of the 5 second magnetic poles.

[0081] Example 8

[0082] Repeat Example 6, except that the angle between the vertical baffle 301 and the vertical direction is 15°.

[0083] Example 9

[0084] Repeat Example 8, except that the vertical baffle 301 can move horizontally. The vertical baffle 301 is connected to the inner side wall of the housing 1 through a slide rail.

[0085] Example 10

[0086] Repeat Example 9, except that the device further includes a first sieve plate 4. The first sieve plate 4 is disposed above the secondary tailing collection area 302 and the secondary concentrate collection area 303. One end of the first sieve plate 4 is connected to the outer side wall of the primary magnetic separation channel 2, and the other end is connected to the inner side wall of the housing 1. The aperture of the sieve holes of the first sieve plate 4 is 3. The first sieve plate 4 is inclined, and the end connected to the housing 1 is lower. A discharge port 5 is provided at the connection between the housing 1 and the first sieve plate 4.

[0087] Example 11

[0088] Repeat Example 10, except that the device further includes a second sieve plate 6. The second sieve plate 6 is disposed at the first concentrate outlet 202 and the first tailing outlet 203. The aperture of the sieve holes of the second sieve plate 6 is 3 mm.

[0089] Example 12

[0090] Repeat Example 11, except that the device further includes a first tailing channel 7. The first tailing channel 7 is disposed outside the first tailing outlet 203. One end of the first tailing channel 7 is connected to the first tailing outlet 203, and the other end is communicated with an external negative pressure air extraction unit.

[0091] Example 13

[0092] An integrated magnetic separation and roasting unit for iron-containing materials. The device includes the iron-containing material magnetic separation device, a transmission channel, and a roasting device described in Example 12. One end of the transmission channel is connected to the second concentrate outlet 305 of the iron-containing material separation device, and the other end is connected to the feed inlet of the roasting device.

[0093] Example 14

[0094] An iron-containing material separation roasting system, which includes the integrated magnetic separation and roasting unit for iron-containing materials described in Embodiment 13, a grinding device, a screening device, an inert gas source, and an oxidizing gas source. The discharge port of the grinding device is connected to the feed port of the screening device through a pipeline. The discharge port of the screening device is connected to the material inlet 201 through a pipeline. The inert gas source is connected to the material inlet 201 through a pipeline. The oxidizing gas source is connected to the oxidizing gas inlet through a pipeline.

[0095] The screen hole diameter of the screening device is 0.5 mm.

[0096] The system further includes a tailing collection device, which is connected to the first tailing outlet 203 and the second tailing outlet 304.

Claims

1. A magnetic separation device for iron-containing materials, characterized in that: The device comprises a housing (1), a primary magnetic separation channel (2) and a secondary magnetic separation zone (3); The primary magnetic separation channel (2) is vertically arranged inside the shell (1) and a material inlet (201) is provided at the bottom of the primary magnetic separation channel (2); a first concentrate outlet (202) is provided on one side of the upper portion of the primary magnetic separation channel (2), and a first tailings outlet (203) is provided on the other side or top of the upper portion of the primary magnetic separation channel (2); a first magnetic pole (204) is provided outside the primary magnetic separation channel (2), and the first magnetic pole (204) is arranged opposite to the first concentrate outlet (202); The secondary magnetic separation zone (3) is arranged in parallel on one side of the primary magnetic separation channel (2) and is connected to the interior of the primary magnetic separation channel (2) through the first concentrate outlet (202); a second magnetic pole (306) is arranged at the upper part of the inner cavity of the secondary magnetic separation zone (3); a vertical baffle (301) is arranged at the lower part of the secondary magnetic separation zone (3), and the lower part of the secondary magnetic separation zone (3) is divided into a secondary tailings collection zone (302) close to the primary magnetic separation channel (2) and a secondary concentrate collection zone (303) away from the primary magnetic separation channel (2) by the vertical baffle (301); a second tailings outlet (304) is arranged at the lower part of the secondary tailings collection zone (302); and a second concentrate outlet (305) is arranged at the lower part of the secondary concentrate collection zone (303).

2. The device according to claim 1, characterized in that: The device comprises a plurality of second magnetic poles (306), which are evenly distributed in the upper part of the secondary magnetic separation zone (3) along the direction from the secondary tailings collection zone (302) to the secondary concentrate collection zone (303).

3. The device according to claim 2, characterized in that: A plurality of the second magnetic poles (306) are laterally arranged at the upper portion of the secondary magnetic separation zone (3); or Along the direction from the secondary tailings collection area (302) to the secondary concentrate collection area (303), the plurality of second magnetic poles (306) are arranged obliquely with their heights gradually decreasing.

4. The device according to claim 2 or 3, characterized in that: Among the plurality of second magnetic poles (306), the magnetism of the second magnetic poles (306) gradually becomes weaker in a direction away from the first concentrate outlet (202).

5. The device according to claim 2 or 3, characterized in that: The first magnetic pole (204) and / or the second magnetic pole (306) are electromagnets.

6. The device according to claim 2 or 3, characterized in that: The device further comprises a partition (307) and a guide plate (308); the partition (307) is vertically arranged between the outer wall of the primary magnetic separation channel (2) and the second magnetic pole (306); one end of the guide plate (308) is connected to the outer wall of the primary magnetic separation channel (2), and the other end extends laterally or downward in a direction away from the primary magnetic separation channel (2); the partition (307), the guide plate (308) and the outer wall of the primary magnetic separation channel (2) together constitute a secondary magnetic separation channel (309).

7. The device according to claim 6, characterized in that: The shape of the partition (307) is the same as the arrangement shape of the plurality of second magnetic poles.

8. The device according to any one of claims 1-3 and 7, characterized in that: The included angle between the vertical baffle (301) and the vertical direction is 0-45°.

9. The device according to claim 4, characterized in that: The included angle between the vertical baffle (301) and the vertical direction is 0-45°.

10. The device according to claim 5, characterized in that: The included angle between the vertical baffle (301) and the vertical direction is 0-45°.

11. The device according to claim 6, characterized in that: The included angle between the vertical baffle (301) and the vertical direction is 0 to 45°.

12. The device according to claim 8, characterized in that: The included angle between the vertical baffle (301) and the vertical direction is 0 to 30°.

13. The device according to any one of claims 9-11, characterized in that: The included angle between the vertical baffle (301) and the vertical direction is 0 to 30°.

14. The device according to any one of claims 1-3, 7, 9-12, characterized in that: The vertical baffle (301) can move horizontally.

15. The device according to claim 4, characterized in that: The vertical baffle (301) can move horizontally.

16. The device according to claim 5, characterized in that: The vertical baffle (301) can move horizontally.

17. The device according to claim 6, characterized in that: The vertical baffle (301) can move horizontally.

18. The device according to any one of claims 1-3, 7, 9-12, characterized in that: The vertical baffle (301) is connected to the inner side wall of the housing (1) through a slide rail.

19. The device according to claim 4, characterized in that: The vertical baffle (301) is connected to the inner side wall of the housing (1) through a slide rail.

20. The device according to claim 5, characterized in that: The vertical baffle (301) is connected to the inner side wall of the housing (1) through a slide rail.

21. The device according to claim 6, wherein: The vertical baffle (301) is connected to the inner side wall of the housing (1) through a slide rail.

22. The device according to any one of claims 1-3, 7, 9-12, 15-17, 19-21, characterized in that: The device further includes a first sieve plate (4); the first sieve plate (4) is arranged above the secondary tailing collection area (302) and / or the secondary concentrate collection area (303), one end of the first sieve plate (4) is connected to the outer side wall of the primary magnetic separation channel (2), and the other end is connected to the inner side wall of the housing (1); the aperture of the sieve holes of the first sieve plate (4) is 1 to 5 mm; and / or The device further includes a second sieve plate (6); the second sieve plate (6) is arranged at the first concentrate outlet (202) and / or the first tailing outlet (203).

23. The device according to claim 4, characterized in that: The device further includes a first sieve plate (4); the first sieve plate (4) is arranged above the secondary tailing collection area (302) and / or the secondary concentrate collection area (303), one end of the first sieve plate (4) is connected to the outer side wall of the primary magnetic separation channel (2), and the other end is connected to the inner side wall of the housing (1); the aperture of the sieve holes of the first sieve plate (4) is 1 to 5 mm; and / or The device further includes a second sieve plate (6); the second sieve plate (6) is arranged at the first concentrate outlet (202) and / or the first tailing outlet (203).

24. The device according to claim 5, characterized in that: The device further includes a first sieve plate (4); the first sieve plate (4) is arranged above the secondary tailing collection area (302) and / or the secondary concentrate collection area (303), one end of the first sieve plate (4) is connected to the outer side wall of the primary magnetic separation channel (2), and the other end is connected to the inner side wall of the housing (1); the aperture of the sieve holes of the first sieve plate (4) is 1 to 5 mm; and / or The device further includes a second sieve plate (6); the second sieve plate (6) is arranged at the first concentrate outlet (202) and / or the first tailing outlet (203).

25. The device according to claim 6, characterized in that: The device further includes a first sieve plate (4); the first sieve plate (4) is arranged above the secondary tailing collection area (302) and / or the secondary concentrate collection area (303), one end of the first sieve plate (4) is connected to the outer side wall of the primary magnetic separation channel (2), and the other end is connected to the inner side wall of the housing (1); the aperture of the sieve holes of the first sieve plate (4) is 1 to 5 mm; and / or The device further includes a second sieve plate (6); the second sieve plate (6) is arranged at the first concentrate outlet (202) and / or the first tailing outlet (203).

26. The device according to claim 22, wherein: The aperture of the sieve holes of the first sieve plate (4) is 1 to 3 mm; and / or The aperture of the sieve holes of the second sieve plate (6) is 1 - 5 mm.

27. The device according to any one of claims 23 to 25, characterized in that: The aperture of the sieve holes of the first sieve plate (4) is 1 - 3 mm; and / or The aperture of the sieve holes of the second sieve plate (6) is 1 - 5 mm.

28. The device according to claim 22, wherein: The first sieve plate (4) is inclined, and the end connected to the housing (1) is lower.

29. The device according to any one of claims 23-25, characterized in that: The first sieve plate (4) is inclined, and the end connected to the housing (1) is lower.

30. The device according to claim 28, characterized in that: A discharge port (5) is provided at the connection between the housing (1) and the first sieve plate (4).

31. The device according to claim 29, characterized in that: A discharge port (5) is provided at the connection between the housing (1) and the first sieve plate (4).

32. The device according to any one of claims 1-3, 7, 9-12, 15-17, 19-21, 23-26, 28, 30-31, characterized in that: The device further includes a first tailing channel (7); the first tailing channel (7) is arranged outside the first tailing outlet (203), one end of the first tailing channel (7) is connected to the first tailing outlet (203), and the other end is communicated with an external negative pressure air extraction unit.

33. An integrated unit for magnetic separation roasting of iron-containing materials, characterized in that: The device includes the iron-containing material magnetic separation device, a transfer channel, and a roasting device according to any one of claims 1 - 32; one end of the transfer channel is connected to the second concentrate outlet (305) of the iron-containing material separation device, and the other end is connected to the feed inlet of the roasting device.

34. An iron-containing material separation roasting system, characterized in that: The system includes the integrated magnetic separation and roasting unit for iron-containing materials, a grinding device, a screening device, an inert gas source, and an oxidizing gas source according to claim 33; the discharge port of the grinding device is communicated with the feed inlet of the screening device through a pipeline; the discharge port of the screening device is communicated with the material inlet (201) through a pipeline; the inert gas source is communicated with the material inlet (201) through a pipeline; the oxidizing gas source is communicated with the oxidizing gas inlet through a pipeline.

35. The iron-containing material separation roasting system according to claim 34, characterized in that: The aperture diameter of the sieve holes of the screening device is 0.01 - 1 mm.

36. The iron-containing material separation roasting system according to claim 34, wherein: The aperture diameter of the sieve holes of the screening device is 0.1 - 0.5 mm.

37. The iron-containing material separation roasting system according to any one of claims 34-36, characterized in that: The system further includes a tailing collection device, and the tailing collection device is communicated with the first tailing outlet (203) and the second tailing outlet (304).

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