A device and method for gradient removal of iron particles by a multi-stage cyclone separator

Abstract

The present invention discloses a device and method for removing iron particles by gradient using a multi-stage cyclone separator, comprising a feeding mechanism, two groups of cyclone separators and an air induction mechanism, wherein the two cyclone separators are respectively an A series cyclone separator and a B series cyclone separator of the same structure and symmetrically arranged; the A series cyclone separator and the B series cyclone separator both include a plurality of cyclone separators connected in series in sequence, and a plurality of groups of magnetic components are installed on the outer side of the straight section and cone of each cyclone separator, and the plurality of cyclone separators connected in series in sequence are recorded as the first cyclone separator, the second cyclone separator, ..., the i-th cyclone separator, ..., the i-th cyclone separator from top to bottom in sequence; the magnetic strength of the plurality of groups of magnetic components increases gradually from top to bottom. The present invention is reasonably designed, and the iron particles are enriched and separated from the non-magnetic powder through a multi-stage gradient, so as to meet the requirements of removing or collecting the iron particle components in the subsequent process.

Description

Technical Field

[0001] The invention belongs to a multi-stage iron removal cyclone separator device, and in particular relates to a device and method for gradiently removing iron particles by a multi-stage cyclone separator. Background Art

[0002] At present, in some industries, raw materials need to be ground into fine powder of a certain fineness to meet the needs of subsequent processes. If a grinding device containing metallic iron as a grinding medium is used, during the grinding process, the metallic iron will be worn and part of it will become iron particles more or less and exist in the finished fine powder. For some chemical industries that are sensitive to iron materials, it will seriously affect product quality or bring many problems to the subsequent production process. Therefore, the iron particles (i.e. pure iron particles and iron-containing particles) in the powdered material must be removed.

[0003] Secondly, the dominant production process in steel smelting determines the generation of a large amount of solid waste. For example, both blast furnace water-quenched slag and steel slag contain iron, and the steel tailings after the steel slag is treated still contain 16% to 21% iron, which cannot be effectively enriched and separated. Therefore, it is necessary to make blast furnace water-quenched slag and steel tailings into powder materials, and then effectively enrich and separate the iron-containing particles in the powder materials, so as to further reduce the iron particles in blast furnace water-quenched slag and steel tailings.

[0004] Therefore, there is a lack of a well-designed multi-stage cyclone separator gradient iron particle removal device that can enrich the iron particles through multi-stage gradients and separate them from non-magnetic powders to facilitate the removal or collection of iron particle components in subsequent processes. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a device and method for gradient removal of iron particles by a multi-stage cyclone separator in view of the deficiencies in the above-mentioned prior art. The device and method have reasonable design and are easy to operate. The iron particles are enriched through multi-stage gradient and separated from non-magnetic powder, which is convenient for removing or collecting iron particle components in subsequent processes, thereby improving the iron removal effect.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for gradient removal of iron particles by a multi-stage cyclone separator, characterized in that: it comprises a feeding mechanism, an air induction mechanism and two groups of cyclone separators, the two groups of cyclone separators are respectively an A series cyclone separator and a B series cyclone separator of the same structure and symmetrically arranged;

[0007] The A series cyclone separators and the B series cyclone separators each include a plurality of cyclone separators connected in series, and a plurality of groups of magnetic components are installed on the outside of the straight section and the cone of each cyclone separator;

[0008] The plurality of cyclone separators connected in series are recorded as the first cyclone separator, the second cyclone separator, ..., the i-th cyclone separator, ..., the I-th cyclone separator from top to bottom, where i and I are both positive integers; the magnetic strength of the plurality of groups of magnetic components gradually increases from top to bottom;

[0009] The inlet of the first cyclone separator is connected to the air inlet pipe through the air inlet flexible pipe, the non-magnetic powder outlet end of the first-first cyclone separator is connected to the air inlet pipe, the outlet pipe of the second cyclone separator is connected to the inlet of the first cyclone separator and the outlet of the feeding mechanism, and the outlet pipe of the first cyclone separator is connected to the air induction mechanism;

[0010] When 1<i≤I, the outlet pipe of the i-th cyclone separator is connected to the inlet of the i-1-th cyclone separator through an intermediate pipe fitting; when 3<i≤I, the intermediate pipe fitting connected to the i-th cyclone separator is connected to the non-magnetic powder outlet end of the i-2-th cyclone separator.

[0011] The above-mentioned device for gradient removal of iron particles using a multi-stage cyclone separator is characterized in that: the feeding mechanism includes a raw material bin, a metering feeder, a three-way reversing valve for unloading and a feed pipe which are connected in sequence, the inlet of the unloading three-way reversing valve is connected to the outlet of the metering feeder, the two outlets of the unloading three-way reversing valve are connected to two feed pipes, and the two feed pipes are respectively connected to the outlet pipes of the second cyclone separator in the A series cyclone separator and the B series cyclone separator.

[0012] The above-mentioned device for gradient removal of iron particles from a multi-stage cyclone separator is characterized in that: the structure of each group of magnetic components is the same, and the magnetic components include a plurality of magnetic components arranged along the straight section and the circumferential direction of the outer side of the cone of the cyclone separator, and each of the magnetic components includes a telescopic part, a mounting plate connected to the telescopic rod of the telescopic part, and a plurality of magnetic parts arranged on the mounting plate.

[0013] The above-mentioned device for gradient removal of iron particles with a multi-stage cyclone separator is characterized in that: the magnetic part is an electromagnet or a permanent magnet adapted to the straight sections and outer side surfaces of the cones of the two cyclone separators, and a rubber buffer layer is arranged between the straight sections and outer side surfaces of the cones of the two cyclone separators and the magnetic part.

[0014] The above-mentioned device for gradient removal of iron particles using a multi-stage cyclone separator is characterized in that: the bottom of the cones of the first cyclone separator to the first cyclone separator in the A series cyclone separator and the B series cyclone separator are provided with a material three-way reversing valve and are connected to the inlet of the material three-way reversing valve, and the two outlets of the material three-way reversing valve are respectively connected to the first conveying pipeline and the second conveying pipeline, the outlet end of the first conveying pipeline is the iron particle outlet end, and the outlet end of the second conveying pipeline is the non-magnetic powder outlet end;

[0015] The first conveying pipeline includes a first conveying pipe, a first conveying flexible pipe and a first flap valve which are sequentially connected to the first outlet of the material three-way reversing valve;

[0016] The second conveying pipeline includes a second conveying pipe, a second conveying flexible pipe and a second flap valve which are sequentially connected to the second outlet of the material three-way reversing valve;

[0017] The iron particle outlet ends of the first cyclone separator to the first cyclone separator are all connected to the iron particle collection bin through the first discharge pipe, and the non-magnetic powder outlet end of the first cyclone separator is connected to the non-magnetic powder collection bin through the second discharge pipe;

[0018] When 3<i≤I, the non-magnetic powder outlet end of the (i-2)th cyclone separator is connected to the intermediate pipe connected to the (i)th cyclone separator through the second discharge pipe.

[0019] The above-mentioned device for gradient removal of iron particles using a multi-stage cyclone separator is characterized in that: multiple cyclone separators in the A series cyclone separators and the B series cyclone separators are installed on a supporting platform, an extension ear is provided on the outer wall of the straight section of the cyclone separator, a vibration damper is provided between the top of the supporting platform and the bottom of the extension ear, and a bin wall vibrator is provided on the outer side of the cone of the cyclone separator.

[0020] The above-mentioned device for removing iron particles by gradient using a multi-stage cyclone separator is characterized in that: the induced draft mechanism comprises a three-way reversing valve, a bag dust collector, an induced draft fan and a chimney connected in sequence;

[0021] The outlet pipes of the A series cyclone separators and the first cyclone separator in the B series cyclone separators are respectively connected to the two inlets of the air outlet three-way reversing valve, and the outlet of the air outlet three-way reversing valve is connected to the bag dust collector;

[0022] The A series cyclone separators and the B series cyclone separators work alternately to complete continuous operation.

[0023] At the same time, the present invention also discloses a method for removing iron particles by gradient using a multi-stage cyclone separator with simple steps and reasonable design, characterized in that the method comprises the following steps:

[0024] Step 1: Determine the number of cyclone separators in the A series cyclone separator and the B series cyclone separator and install them:

[0025] Step 101, determining the number of cyclone separators in the A series cyclone separators and the B series cyclone separators as 1 according to the particle size and type of the powdery material to be processed;

[0026] Step 102, connecting the outlet of the second cyclone separator in the A series cyclone separators to an outlet of the unloading three-way reversing valve through a feed pipe;

[0027] At the same time, connect the outlet of the second cyclone separator in the B series cyclone separator to the other outlet of the unloading three-way reversing valve through another feed pipe;

[0028] Step 103, multiple groups of magnetic components are installed on the straight section and the outer side of the cone of one cyclone separator in the A series cyclone separator and the B series cyclone separator;

[0029] Step 2: Add powdered material into the feeding mechanism;

[0030] Step 201, adding the powdered material to be processed into the raw material bin in the feeding mechanism;

[0031] Step 202: Install and connect iron particle collection bins and non-magnetic powder collection bins in the A series cyclone separators and the B series cyclone separators;

[0032] Step 3: A series cyclone separators and B series cyclone separators are used to remove iron particles from powdered materials alternately:

[0033] Step 301, operate the unloading three-way reversing valve to make the outlet of the second cyclone separator in the A series cyclone separators communicate with the inlet of the unloading three-way reversing valve through a feed pipe, and the B series cyclone separators are not connected with the inlet of the unloading three-way reversing valve;

[0034] Operate multiple groups of magnetic components outside the A series cyclone separator to work, and at the same time, control the bottom of the A series cyclone separator, the second outlet of the material three-way reversing valve to be connected with the second conveying pipeline;

[0035] The outlet pipe of the first cyclone separator in the A series cyclone separator is connected to the outlet of the air outlet three-way reversing valve, and the outlet pipe of the first cyclone separator in the B series cyclone separator is not connected to the outlet of the air outlet three-way reversing valve;

[0036] Step 302, operate the induced draft fan connected to the A series cyclone separator to suck air from the air inlet pipe, pass through the multi-stage gradient of the A series cyclone separator to remove iron particles, and the iron particle powder is adsorbed on the inner wall of the cyclone separator, and the non-magnetic powder that is not adsorbed on the inner wall of the cyclone separator enters the non-magnetic powder collection bin;

[0037] Step 303, operate the unloading three-way reversing valve to make the outlet of the second cyclone separator in the A series cyclone separator disconnected from the inlet of the unloading three-way reversing valve through a feed pipe, and the B series cyclone separator is connected to the inlet of the unloading three-way reversing valve;

[0038] Operate the multiple groups of magnetic components outside the A series cyclone separator to stop working, and at the same time, control the bottom of the A series cyclone separator, the first outlet of the material three-way reversing valve and the first conveying pipeline to be connected;

[0039] The outlet pipe of the first cyclone separator in the A series cyclone separators is not connected to the outlet of the air outlet three-way reversing valve, and the outlet pipe of the first cyclone separator in the B series cyclone separators is connected to the outlet of the air outlet three-way reversing valve;

[0040] Step 304: When the bottom of the cyclone separator in the A series cyclone separator is connected to the first outlet of the material three-way reversing valve, the iron particle powder adsorbed on the inner wall of the A series cyclone separator passes through the bottom of the cyclone separator, the first outlet of the material three-way reversing valve, the first conveying pipe, the first conveying flexible pipe and the first flap valve into the iron particle collecting bin for collection; wherein the bin wall vibrator arranged on the cone of the cyclone separator works, and the cyclone separator is vibrated by the vibration damper to accelerate the falling of the iron particle powder;

[0041] At the same time, according to the method of step 302, the powdered material to be processed enters the B series cyclone separator for multi-stage gradient iron removal;

[0042] Step 305: operate the multiple groups of magnetic components outside the B series cyclone separator to not work, and operate the bottom of the cyclone separator in the B series cyclone separator to communicate with the first outlet of the material three-way reversing valve, so that the iron particle powder adsorbed on the inner wall of the cyclone separator passes through the bottom end of the cyclone separator, the first outlet of the material three-way reversing valve, the first conveying pipe, the first conveying flexible pipe and the first flap valve into the iron particle collection bin for collection;

[0043] At the same time, according to the method of step 302, the powdered material to be processed enters the A series cyclone separator for multi-stage gradient iron removal;

[0044] Step 306, repeating steps 302 to 305 for multiple times, so that the A series cyclone separators and the B series cyclone separators can be used to remove iron particles in the powdery material in multiple stages alternately.

[0045] The above method is characterized in that: step 302, the specific process is as follows:

[0046] Step 3021, operate the induced draft fan connected to the A series cyclone separator to suck air from the air inlet pipe, and at the same time, operate the powdered material to be processed in the raw material bin to enter through the metering feeder, the unloading three-way reversing valve and a feeding pipe in sequence, and the air and the powdered material to be processed are mixed and enter the first cyclone separator through the inlet of the first cyclone separator;

[0047] Step 3022, the powdered material to be processed falls along the first cyclone separator, and the air is discharged from the chimney after being connected to the air outlet three-way reversing valve, the bag dust collector, and the induced draft fan in sequence;

[0048] At the same time, when the powdered material to be processed falls along the first cyclone separator, multiple groups of magnetic components work to produce magnetically adsorbed iron particle powder on the inner wall of the first cyclone separator, and the non-magnetic powder not adsorbed on the inner wall of the first cyclone separator passes through the bottom end of the first cyclone separator, the second outlet of the material three-way reversing valve, and the non-magnetic powder port of the second conveying pipeline into the intermediate pipe, and continues to enter the second cyclone separator with the air entering the intermediate pipe;

[0049] Step 3023, the non-magnetic powder entering the bottom end of the first cyclone separator enters the second cyclone separator for secondary iron particle removal, and multiple groups of magnetic components work to produce magnetically adsorbed iron particle powder on the inner wall of the second cyclone separator, and the non-magnetic powder not adsorbed on the inner wall of the second cyclone separator passes through the bottom end of the second cyclone separator, the second outlet of the material three-way reversing valve, and the non-magnetic powder port of the second conveying pipeline into the intermediate pipe, and continues to enter the third cyclone separator with the air entering the intermediate pipe;

[0050] Step 3024, repeat step 3023 multiple times, after the first stage iron removal of the first cyclone separator, the non-magnetic powder not adsorbed on the inner wall of the first cyclone separator passes through the bottom end of the first cyclone separator, the second outlet of the material three-way reversing valve, and the non-magnetic powder port of the second conveying pipeline into the non-magnetic powder collecting bin; wherein, the iron particle powder is adsorbed on the inner wall of the cyclone separator.

[0051] The above method is characterized in that: in step 101, the number of cyclone separators in the A series cyclone separators and the B series cyclone separators is determined to be I according to the particle size of the powdery material to be processed, and the specific process is as follows:

[0052] Step A, when the particle size of the powdered material is set to F1, the number of cyclone separators in the A series cyclone separators and the B series cyclone separators is obtained as I1;

[0053] Step B, repeating step A multiple times, and obtaining a powder material with a particle size of Fc, wherein the number of cyclone separators in the A series cyclone separators and the B series cyclone separators is Ic;

[0054] Step C, repeating step B for multiple times, obtaining the number of cyclone separators in the A series cyclone separators and the B series cyclone separators as IC when the particle size of the powder material is FC;

[0055] Step D, using a computer to record the number of cyclone separators I1, ..., corresponding to the particle size F1, the number of cyclone separators Ic, ..., corresponding to the particle size Fc, and the number of cyclone separators IC corresponding to the particle size FC as training data;

[0056] Step E, using a computer to establish an ELM network model, and inputting the training data in step D to obtain a trained ELM network model; wherein the number of nodes in the input layer of the ELM network model is 2, and the particle size and type of the powdered material are used as the input of the ELM network model; the number of nodes in the output layer of the ELM network model is 1, and the number of cyclone separators is used as the output of the ELM network model;

[0057] Step F: input the particle size and type of the powdery material to be processed into the trained ELM network model to obtain the number I of cyclone separators, that is, the number of cyclone separators in the A series cyclone separators and the B series cyclone separators is I.

[0058] Compared with the prior art, the present invention has the following advantages:

[0059] 1. The present invention has reasonable design, simple installation and layout, high working efficiency, and is suitable for separating iron particles (pure iron particles and iron-containing particles) in subsequent powder material processes, so as to meet the needs of removing iron particle components or enriching iron particle components in subsequent processes.

[0060] 2. The two series of cyclone separators used are A series cyclone separator and B series cyclone separator, which work alternately. That is, when the A series cyclone separator is fed with powdery materials, multiple groups of magnetic components work to adsorb iron particles in the powdery materials on the straight section and cone of the cyclone separator, and the non-magnetic powder that is not adsorbed enters the non-magnetic powder collection bin for collection. At the same time, the B series cyclone separator stops feeding powdery materials, multiple groups of magnetic components do not work, and the iron particles adsorbed on the straight section and cone of the cyclone separator enter the iron particle collection bin for collection. This process is repeated alternately, thereby continuously and uninterruptedly removing iron particles from the powdery materials.

[0061] 3. The A series cyclone separators and B series cyclone separators used both include multiple cyclone separators connected in series from top to bottom, and the magnetic strength of multiple groups of magnetic components of multiple cyclone separators gradually increases from top to bottom, thereby realizing the series multi-stage gradient iron removal of powdered materials.

[0062] 4. The inlet and air inlet pipe of the first cyclone separator and the non-magnetic powder outlet of the first-1 cyclone separator are connected to the air inlet pipe, and the intermediate pipe connected to the first cyclone separator is connected to the non-magnetic powder outlet of the first-2 cyclone separator, so as to realize the serial multi-stage gradient iron removal of the non-magnetic powder;

[0063] The outlet pipe of the second cyclone separator is connected to the inlet of the first cyclone separator and the outlet of the feeding mechanism. This is so that after the air is inhaled in the air inlet pipe, the original powdered material transmitted by the feeding mechanism is fully dispersed, and then enters the first cyclone separator for iron particles, so that the iron particles in the powdered material are removed serially in the subsequent sequence.

[0064] 5. The A series cyclone separators and B series cyclone separators used are alternately connected to the feeding mechanism, so as to achieve alternating feeding of the A series cyclone separators and the B series cyclone separators, and then achieve subsequent alternating iron removal.

[0065] 6. The multiple groups of magnetic components are installed and arranged along the straight sections and the outer sides of the cones of the two cyclone separators, thereby achieving multiple iron removals during the falling process of the powdered materials, thereby improving the iron removal efficiency and effect.

[0066] In summary, the design is reasonable and the operation is convenient. The iron particles are enriched through multi-level gradients and separated from non-magnetic powder, which is convenient for removing or collecting iron particle components in subsequent processes, thereby meeting the requirements of reuse and green environmental protection of steel slag in the metallurgical industry and other processes for removing iron particles from powdered materials.

[0067] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 It is a structural schematic diagram of the feeding mechanism of the present invention.

[0069] Figure 2 It is a structural schematic diagram of the air induction mechanism of the present invention.

[0070] Figure 3 It is a schematic diagram of the structure of the A series cyclone separator (B series cyclone separator) of the present invention.

[0071] Figure 4 It is a schematic structural diagram of the magnetic component of the present invention.

[0072] Description of reference numerals:

[0073] 1—the first cyclone separator; 1-1—the first intermediate flexible pipe; 1-2—the first intermediate pipe;

[0074] 2—the second cyclone separator; 2-1—the second intermediate flexible pipe; 2-2—the second intermediate pipe;

[0075] 2-3—second connecting flexible pipe; 3—third cyclone separator;

[0076] 3-1—third intermediate flexible pipe; 3-2—third intermediate pipe;

[0077] 3-3—the third connecting flexible pipe; 4—raw material bin; 5—metering feeder;

[0078] 6—three-way reversing valve for feeding; 7—feeding pipe; 8—chimney;

[0079] 9—induced draft fan; 10—bag dust collector; 11—air outlet three-way reversing valve;

[0080] 12—air inlet pipe; 12-1—air inlet flexible pipe; 13-1—first delivery pipe;

[0081] 13-2—first flexible conveying pipe; 13-3—second flexible conveying pipe; 13-4—second flexible conveying pipe;

[0082] 14—magnetic components; 14-1—telescopic parts; 14-2—mounting plate;

[0083] 14-3—magnetic part; 15—rubber buffer layer;

[0084] 16—support platform; 17—extension ear; 18—shock absorber;

[0085] 19—silo wall vibrator; 20—material three-way reversing valve; 21—second flap valve;

[0086] 21-1—second discharge pipe; 22—iron particle collection bin; 23—non-magnetic powder collection bin;

[0087] 24—A series cyclone separator; 25—B series cyclone separator;

[0088] 27—the first flap valve; 27-1—the first discharge pipe. DETAILED DESCRIPTION

[0089] like Figures 1 to 4 A device for removing iron particles by gradient using a multi-stage cyclone separator is shown, comprising a feeding mechanism, an air induction mechanism and two groups of cyclone separators, wherein the two groups of cyclone separators are an A series cyclone separator 24 and a B series cyclone separator 25 which are identical in structure and symmetrically arranged;

[0090] The A series cyclone separator 24 and the B series cyclone separator 25 each include a plurality of cyclone separators connected in series, and a plurality of groups of magnetic components 14 are installed on the outer side of the straight section and cone of each cyclone separator;

[0091] The plurality of cyclone separators connected in series are sequentially recorded as the first cyclone separator, the second cyclone separator, ..., the i-th cyclone separator, ..., the I-th cyclone separator from top to bottom, where i and I are both positive integers; the magnetic strength of the plurality of groups of magnetic components 14 gradually increases from top to bottom;

[0092] The inlet of the first cyclone separator is connected to the air inlet pipe 12 through the air inlet flexible pipe 12-1, the non-magnetic powder outlet end of the first cyclone separator is connected to the air inlet pipe 12, the outlet pipe of the second cyclone separator is connected to the inlet of the first cyclone separator and the outlet of the feeding mechanism, and the outlet pipe of the first cyclone separator is connected to the air induction mechanism;

[0093] When 1<i≤I, the outlet pipe of the i-th cyclone separator is connected to the inlet of the i-1-th cyclone separator through an intermediate pipe fitting; when 3<i≤I, the intermediate pipe fitting connected to the i-th cyclone separator is connected to the non-magnetic powder outlet end of the i-2-th cyclone separator.

[0094] In this embodiment, the feeding mechanism includes a raw material bin 4, a metering feeder 5, a three-way reversing valve 6 and a feed pipe 7 which are connected in sequence. The inlet of the three-way reversing valve 6 is connected to the outlet of the metering feeder 5, and the two outlets of the three-way reversing valve 6 are connected to two feed pipes 7. The two feed pipes 7 are respectively connected to the outlet pipes of the second cyclone separator in the A series cyclone separator 24 and the B series cyclone separator 25.

[0095] In this embodiment, the structure of each group of the magnetic components 14 is the same. The magnetic components 14 include a plurality of magnetic components arranged along the straight section and the circumferential direction of the outer side of the cone of the cyclone separator. Each of the magnetic components includes a telescopic member 14-1, a mounting plate 14-2 connected to the telescopic rod of the telescopic member 14-1, and a plurality of magnetic members 14-3 arranged on the mounting plate 14-2.

[0096] In this embodiment, the magnetic member 14-3 is an electromagnet or a permanent magnet adapted to the straight sections and the outer side surfaces of the cones of the two cyclone separators, and a rubber buffer layer 15 is provided between the straight sections and the outer side surfaces of the cones of the two cyclone separators and the magnetic member 14-3.

[0097] In this embodiment, the bottom of the cones of the first cyclone separator to the first cyclone separator in the A series cyclone separator 24 and the B series cyclone separator 25 are provided with a material three-way reversing valve 20 and are connected to the inlet of the material three-way reversing valve 20. The two outlets of the material three-way reversing valve 20 are respectively connected to the first conveying pipeline and the second conveying pipeline. The outlet end of the first conveying pipeline is the iron particle outlet end, and the outlet end of the second conveying pipeline is the non-magnetic powder outlet end.

[0098] The first conveying pipeline includes a first conveying pipe 13-1, a first conveying flexible pipe 13-2 and a first flap valve 27 which are sequentially connected to the first outlet of the material three-way reversing valve 20;

[0099] The second conveying pipeline includes a second conveying pipe 13-3, a second conveying flexible pipe 13-4 and a second flap valve 21 which are sequentially connected to the second outlet of the material three-way reversing valve 20;

[0100] The iron particle outlet ends of the first cyclone separator to the first cyclone separator are connected to the iron particle collection bin 22 through the first discharge pipe 27-1, and the non-magnetic powder outlet end of the first cyclone separator is connected to the non-magnetic powder collection bin 23 through the second discharge pipe 21-1;

[0101] When 3<i≤I, the non-magnetic powder outlet end of the i-2 th cyclone separator is connected to the intermediate pipe connected to the i th cyclone separator through the second discharge pipe 21 - 1.

[0102] In this embodiment, multiple cyclone separators in the A series cyclone separators 24 and the B series cyclone separators 25 are installed on a supporting platform 16, an extension ear 17 is provided on the outer wall of the straight section of the cyclone separator, a vibration damper 18 is provided between the top of the supporting platform 16 and the bottom of the extension ear 17, and a bin wall vibrator 19 is provided on the outer side of the cone of the cyclone separator.

[0103] In this embodiment, the induced draft mechanism includes a three-way reversing valve 11, a bag dust collector 10, an induced draft fan 9 and a chimney 8 connected in sequence;

[0104] The outlet pipes of the first cyclone separator in the A series cyclone separator 24 and the B series cyclone separator 25 are respectively connected to the two inlets of the air outlet three-way reversing valve 11, and the outlet of the air outlet three-way reversing valve 11 is connected to the bag dust collector 10;

[0105] The A series cyclone separators 24 and the B series cyclone separators 25 work alternately to complete continuous operation.

[0106] In this embodiment, the value range of I is 3 to 10, or it is adjusted according to subsequent predictions or adaptive adjustments. Figure 3 , I takes the value of 3, then from top to bottom they are recorded as the first cyclone separator 1, the second cyclone separator 2, and the third cyclone separator 3.

[0107] In this embodiment, the intermediate pipe comprises an intermediate flexible pipe and an intermediate pipe connected to the intermediate flexible pipe, each intermediate flexible pipe is respectively a third intermediate flexible pipe 3-1, a second intermediate flexible pipe 2-1 and a first intermediate flexible pipe 1-1; each intermediate pipe is respectively a third intermediate pipe 3-2, a second intermediate pipe 2-2 and a first intermediate pipe 1-2, the third intermediate pipe 3-2 is connected to the inlet of the second cyclone separator through a third connecting flexible pipe 3-3, the second intermediate pipe 2-2 is connected to the inlet of the first cyclone separator 1 through a second connecting flexible pipe 2-3, and the first intermediate pipe 1-2 in the A series cyclone separator 24 and the B series cyclone separator 25 is respectively connected to the two inlets of the air outlet three-way reversing valve 11;

[0108] The third intermediate flexible tube 3 - 1 , the second intermediate flexible tube 2 - 1 and the first intermediate flexible tube 1 - 1 are connected to the outlet pipe of the third cyclone separator 3 , the outlet pipe of the second cyclone separator 2 and the outlet pipe of the first cyclone separator 1 respectively.

[0109] In this embodiment, the inlet of the third cyclone separator 3 is connected to the air inlet pipe 12 through the air inlet flexible pipe 12-1, the non-magnetic powder outlet end of the second cyclone separator 2 is connected to the air inlet pipe 12, the outlet pipe of the second cyclone separator 2 is connected to the inlet of the first cyclone separator 1 and the outlet of the feed pipe 7, and the outlet pipe of the first cyclone separator 1 is connected to the inlet of the air outlet three-way reversing valve 11;

[0110] The outlet pipe of the third cyclone separator 3 is connected to the inlet of the second cyclone separator 2 through an intermediate pipe, and the intermediate pipe connected to the third cyclone separator 3 is connected to the non-magnetic powder outlet end of the first cyclone separator 1.

[0111] In this embodiment, the outlet of the second flap valve 21 is connected to the second discharge pipe 21 - 1 .

[0112] In this embodiment, it should be noted that the first flap valve 27 in the first conveying pipeline and the second flap valve 21 in the second conveying pipeline can both function to allow powder to pass through, but cannot allow gas to pass into the first conveying pipeline or the second conveying pipeline. In this way, when the intermediate pipe connected to the third cyclone separator is connected to the non-magnetic powder outlet of the first cyclone separator, the non-magnetic powder at the non-magnetic powder outlet of the first cyclone separator falls to the third intermediate pipe 3-2 through the second discharge pipe 21-1 by gravity, and then enters the second cyclone separator through the inlet of the second cyclone separator along with the air discharged from the third intermediate pipe 3-2 for iron removal and separation again.

[0113] The non-magnetic powder at the non-magnetic powder outlet of the second cyclone separator falls into the air inlet pipe 12 through the second discharge pipe 21-1 by gravity, and then enters the third cyclone separator for further iron removal and separation.

[0114] In this embodiment, the housing of the cyclone separators in the A series cyclone separators 24 and the B series cyclone separators 25 consists of three sections: an upper volute, a straight section in the middle, and a cone at the bottom. An inlet is provided on one side of the upper volute. An outlet pipe is vertically inserted at the upper end of the upper volute, and a discharge port is provided at the bottom end of the cone at the bottom. The material three-way reversing valve 20 is provided at the discharge port.

[0115] In this embodiment, the shells of the A series cyclone separators 24 and the B series cyclone separators 25 are made of non-magnetized steel or other materials such as fiberglass, and the diameter of the straight section in the middle of the cyclone separator 1 is Φ200 to 10000 mm, and more preferably Φ2000 mm.

[0116] In this embodiment, the permanent magnet may refer to a neodymium iron boron permanent magnet, which has the characteristics of high magnetic properties, good stability, high corrosion resistance, etc.

[0117] In this embodiment, the telescopic member 14-1 can refer to any structure that can realize telescopic adjustment, such as an electric telescopic rod, a mechanical telescopic rod, a hydraulic rod, a cylinder, a straight motor, etc. The telescopic member 14-1 is provided to facilitate the installation of the magnetic member 14-3 when it is telescopic, and facilitate the arrangement of the magnetic member 14-3 close to the outer wall of the cyclone separator when it is extended; on the other hand, it can not only realize the installation of the electromagnet, but also when the permanent magnet is installed, when it is arranged close to the outer wall of the cyclone separator, the permanent magnet acts, and when it is far away from the outer wall of the cyclone separator when it is telescopic, the permanent magnet does not act, which is convenient for adjustment according to actual needs.

[0118] In this embodiment, in actual use, there are multiple magnetic components to adapt to the circumferential direction of the straight section of the cyclone separator and the circumferential direction of the outer surface of the cone of the cyclone separator. In actual use, the number and shape of the electromagnet or permanent magnet can be adjusted as needed as long as the needs are met.

[0119] In this embodiment, the A series cyclone separator 24 and the B series cyclone separator 25 are installed on the support platform 16, and a transition foundation for the telescopic member 14-1 to connect is provided on the support platform 16. In actual use, the fixed end of the telescopic member 14-1 can be installed by setting up a plate.

[0120] In this embodiment, when the magnetic part 14-3 is an electromagnet, the electromagnet generates magnetic force when power is turned on and the magnetic force disappears completely when power is turned off; the magnetic part 14-3 is a permanent magnet, which works when it is in the contact working position and stops working when it is not far from the working position.

[0121] In this embodiment, after the original powdery material passes through the cyclone separator, the iron-containing particles are enriched and effectively separated from the non-magnetic powder. Its working principle is to arrange integral or several magnetic components that can generate magnetic field around the outer side of the cyclone separator shell, and the magnetic lines penetrate the shell to make the shell plate have a certain magnetic force; when the A series cyclone separator is working and online, the B series cyclone separator is in a non-working and offline state; the original powdered material fully dispersed in the airflow enters the A cyclone separator for movement, and under the action of centrifugal force, the original powdered material clings to the inner wall and moves in a circle and downward along the inner wall surface. After a part of the iron particles in the original powdered material are adsorbed on the inner wall by the magnetic force, they no longer follow the airflow movement, and the remaining powdered material is collected in the non-magnetic powder collecting bin through the separator; after the A series cyclone separator is completed, it is transferred to the B series cyclone separator for work; at this time, the magnetic components outside the A series cyclone separator stop working, the electromagnet is powered off, or the permanent magnet is in a non-working position, and the iron particles fall freely into the iron particle bin after the magnetic force disappears; the A series cyclone separator and the B series cyclone separator work alternately, so that the entire iron removal device is in a continuous working state.

[0122] In this embodiment, it should be noted that the original powdered material is fully dispersed in the airflow in the cyclone separator, close to the movement of a single particle in the air. Attracted by magnetic force, the iron particles are tightly adsorbed on the inner wall of the shell without sticking to other non-magnetic powders, and the iron absorption efficiency is high.

[0123] In this embodiment, the A series cyclone separators and the B series cyclone separators are respectively mounted on the supporting platform 16 through the vibration damper 18, and are softly connected with other pipelines through the soft connecting pipe of rubber or bellows structure. When the silo wall vibrator 19 fixed on the cone of the cyclone separator is working, the cyclone separator can be vibrated independently, and the falling and complete discharge of iron particles can be accelerated.

[0124] In this embodiment, a rubber buffer layer 15 is provided to isolate the magnetic component 14 - 3 to prevent damage to the magnetic component 14 - 3 , but does not affect the magnetic force.

[0125] A method for removing iron particles by gradient using a multi-stage cyclone separator comprises the following steps:

[0126] Step 1: Determine the number of cyclone separators in the A series cyclone separator and the B series cyclone separator and install them:

[0127] Step 101, determining the number of cyclone separators in the A series cyclone separators and the B series cyclone separators as 1 according to the particle size and type of the powdery material to be processed;

[0128] Step 102, connecting the outlet of the second cyclone separator in the A series cyclone separator 24 to an outlet of the unloading three-way reversing valve 6 through a feed pipe 7;

[0129] At the same time, the outlet of the second cyclone separator in the B series cyclone separator 25 is connected to the other outlet of the unloading three-way reversing valve 6 through another feed pipe 7;

[0130] Step 103, multiple groups of magnetic components 14 are installed on the straight section and the outer side of the cone of one cyclone separator in the A series cyclone separator 24 and the B series cyclone separator 25;

[0131] Step 2: Add powdered material into the feeding mechanism;

[0132] Step 201, adding the powdered material to be processed into the raw material bin 4 in the feeding mechanism;

[0133] Step 202, the iron particle collection bin 22 and the non-magnetic powder collection bin 23 are installed and connected in the A series cyclone separator 24 and the B series cyclone separator 25;

[0134] Step 3: A series cyclone separators and B series cyclone separators are used to remove iron particles from powdered materials alternately:

[0135] Step 301, operate the three-way reversing valve 6 to make the outlet of the second cyclone separator in the A series cyclone separator 24 communicate with the inlet of the three-way reversing valve 6 through a feed pipe 7, and the B series cyclone separator 25 is not connected with the inlet of the three-way reversing valve 6;

[0136] Operate the multiple groups of magnetic components 14 outside the A series cyclone separator 24 to work, and at the same time, control the bottom of the A series cyclone separator 24, the second outlet of the material three-way reversing valve 20 to be connected to the second conveying pipeline;

[0137] The outlet pipe of the first cyclone separator in the A series cyclone separator 24 is connected to the outlet of the air outlet three-way reversing valve 11, and the outlet pipe of the first cyclone separator in the B series cyclone separator 25 is not connected to the outlet of the air outlet three-way reversing valve 11;

[0138] Step 302, operate the induced draft fan 9 connected to the A series cyclone separator 24 to suck air from the air inlet pipe 12, pass through the multi-stage gradient of the A series cyclone separator 24 to remove iron particles, and the iron particle powder is adsorbed on the inner wall of the cyclone separator, and the non-magnetic powder that is not adsorbed on the inner wall of the cyclone separator enters the non-magnetic powder collection bin 23;

[0139] Step 303, operate the unloading three-way reversing valve 6 so that the outlet of the second cyclone separator in the A series cyclone separator 24 is disconnected from the inlet of the unloading three-way reversing valve 6 through a feed pipe 7, and the B series cyclone separator 25 is connected to the inlet of the unloading three-way reversing valve 6;

[0140] The plurality of magnetic components 14 outside the A series cyclone separator 24 are operated to not work, and at the same time, the bottom of the A series cyclone separator 24, the first outlet of the material three-way reversing valve 20 and the first conveying pipeline are controlled to be connected;

[0141] The outlet pipe of the first cyclone separator in the A series cyclone separator 24 is not connected to the outlet of the air outlet three-way reversing valve 11, and the outlet pipe of the first cyclone separator in the B series cyclone separator 25 is connected to the outlet of the air outlet three-way reversing valve 11;

[0142] Step 304, when the bottom of the cyclone separator in the A series cyclone separator 24 is connected to the first outlet of the material three-way reversing valve 20, the iron particle powder adsorbed on the inner wall of the A series cyclone separator 24 passes through the bottom of the cyclone separator, the first outlet of the material three-way reversing valve 20, the first conveying pipe 13-1, the first conveying flexible pipe 13-2 and the first flap valve 27 to enter the iron particle collecting bin 22 for collection; wherein the bin wall vibrator 17 arranged on the cone of the cyclone separator works, and the cyclone separator is vibrated through the vibration damper 18 to accelerate the falling of the iron particle powder;

[0143] At the same time, according to the method of step 302, the powdered material to be processed enters the B series cyclone separator 25 for multi-stage gradient iron removal;

[0144] Step 305: operate the multiple groups of magnetic components 14 outside the B series cyclone separator 25 to not work, and operate the bottom of the cyclone separator in the B series cyclone separator 25 to communicate with the first outlet of the material three-way reversing valve 20, and the iron particle powder adsorbed on the inner wall of the cyclone separator passes through the bottom end of the cyclone separator, the first outlet of the material three-way reversing valve 20, the first conveying pipe 13-1, the first conveying flexible pipe 13-2 and the first flap valve 27 to enter the iron particle collection bin 22 for collection;

[0145] At the same time, according to the method of step 302, the powdered material to be processed enters the A series cyclone separator 24 for multi-stage gradient iron removal;

[0146] Step 306, repeating steps 302 to 305 for multiple times, so that the A series cyclone separators 24 and the B series cyclone separators 25 can be used to remove iron particles in the powdery material in multiple stages alternately.

[0147] In this embodiment, step 302, the specific process is as follows:

[0148] Step 3021, operate the induced draft fan 9 connected to the A series cyclone separator 24 to suck air from the air inlet pipe 12, and at the same time, operate the powdered material to be processed in the raw material bin 4 to enter through the metering feeder 5, the unloading three-way reversing valve 6 and a feed pipe 7 in sequence, and the air and the powdered material to be processed are mixed and enter the first cyclone separator through the inlet of the first cyclone separator;

[0149] Step 3022, the powdery material to be processed falls along the first cyclone separator, and the air is sequentially connected to the air outlet three-way reversing valve 11, the bag dust collector 10, and the induced draft fan 9, and then discharged from the chimney 8;

[0150] At the same time, when the powdered material to be processed falls along the first cyclone separator, the multiple groups of magnetic components 14 work to produce magnetically adsorbed iron particle powder on the inner wall of the first cyclone separator, and the non-magnetic powder not adsorbed on the inner wall of the first cyclone separator passes through the bottom end of the first cyclone separator, the second outlet of the material three-way reversing valve 20, and the non-magnetic powder port of the second conveying pipeline into the intermediate pipe, and continues to enter the second cyclone separator with the air entering the intermediate pipe;

[0151] Step 3023, the non-magnetic powder entering the bottom end of the first cyclone separator enters the second cyclone separator for secondary iron particle removal, and the multiple groups of magnetic components 14 work to produce magnetically adsorbed iron particle powder on the inner wall of the second cyclone separator, and the non-magnetic powder not adsorbed on the inner wall of the second cyclone separator passes through the bottom end of the second cyclone separator, the second outlet of the material three-way reversing valve 20, and the non-magnetic powder port of the second conveying pipeline into the intermediate pipe, and continues to enter the third cyclone separator with the air entering the intermediate pipe;

[0152] Step 3024, repeat step 3023 multiple times, after the first stage iron removal of the first cyclone separator, the non-magnetic powder not adsorbed on the inner wall of the first cyclone separator passes through the bottom end of the first cyclone separator, the second outlet of the material three-way reversing valve 20, and the non-magnetic powder port of the second conveying pipeline into the non-magnetic powder collecting bin 23; wherein, the iron particle powder is adsorbed on the inner wall of the cyclone separator.

[0153] In this embodiment, in step 101, the number of cyclone separators in the A series cyclone separators and the B series cyclone separators is determined to be 1 according to the particle size of the powdery material to be processed. The specific process is as follows:

[0154] Step A, when the particle size of the powdered material is set to F1, the number of cyclone separators in the A series cyclone separators and the B series cyclone separators is obtained as I1;

[0155] Step B, repeating step A multiple times, and obtaining a powder material with a particle size of Fc, wherein the number of cyclone separators in the A series cyclone separators and the B series cyclone separators is Ic;

[0156] Step C, repeating step B for multiple times, obtaining the number of cyclone separators in the A series cyclone separators and the B series cyclone separators as IC when the particle size of the powder material is FC;

[0157] Step D, using a computer to record the number of cyclone separators I1, ..., corresponding to the particle size F1, the number of cyclone separators Ic, ..., corresponding to the particle size Fc, and the number of cyclone separators IC corresponding to the particle size FC as training data;

[0158] Step E, using a computer to establish an ELM network model, and inputting the training data in step D to obtain a trained ELM network model; wherein the number of nodes in the input layer of the ELM network model is 2, and the particle size and type of the powdered material are used as the input of the ELM network model; the number of nodes in the output layer of the ELM network model is 1, and the number of cyclone separators is used as the output of the ELM network model;

[0159] Step F: input the particle size and type of the powdery material to be processed into the trained ELM network model to obtain the number I of cyclone separators, that is, the number of cyclone separators in the A series cyclone separators and the B series cyclone separators is I.

[0160] In this embodiment, the particle size of the powdery material to be processed is 1 μm to 1000 μm.

[0161] In summary, the design is reasonable and the operation is convenient. The iron particles are enriched through multi-level gradients and separated from non-magnetic powder, which is convenient for removing or collecting iron particle components in subsequent processes. This meets the requirements of repeated reuse of steel slag and green environmental protection in the metallurgical industry.

[0162] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A device for removing iron particles by gradient using a multi-stage cyclone separator, characterized in that: It comprises a feeding mechanism, an air inducing mechanism and two groups of cyclone separators, wherein the two groups of cyclone separators are respectively an A series cyclone separator (24) and a B series cyclone separator (25) of the same structure and symmetrically arranged; The A series cyclone separator (24) and the B series cyclone separator (25) each comprise a plurality of cyclone separators connected in series, and a plurality of groups of magnetic components (14) are installed on the outer side of the straight section and cone of each cyclone separator; The plurality of cyclone separators connected in series are denoted from top to bottom as the first cyclone separator, the second cyclone separator, ..., the i-th cyclone separator, ..., the I-th cyclone separator, where i and I are both positive integers; the magnetic strength of the plurality of groups of magnetic components (14) gradually increases from top to bottom; The inlet of the first cyclone separator is connected to the air inlet pipe (12) through the air inlet flexible pipe (12-1), the non-magnetic powder outlet end of the first-first cyclone separator is connected to the air inlet pipe (12), the air outlet pipe of the second cyclone separator is connected to the inlet of the first cyclone separator and the outlet of the feeding mechanism, and the air outlet pipe of the first cyclone separator is connected to the air induction mechanism; When 1<i≤I, the air outlet pipe of the i-th cyclone separator is connected to the inlet of the i-1-th cyclone separator through the intermediate pipe; wherein, when i=2, the air outlet pipe of the second cyclone separator is connected to the outlet of the feeding mechanism; when 3<i≤I, the intermediate pipe connected to the i-th cyclone separator is connected to the non-magnetic powder outlet of the i-2-th cyclone separator; the non-magnetic powder at the non-magnetic powder outlet of the first cyclone separator enters through the inlet of the second cyclone separator; The bottom of the cones of the first cyclone separator to the first cyclone separator in the A series cyclone separator (24) and the B series cyclone separator (25) are provided with a material three-way reversing valve (20) and are connected to the inlet of the material three-way reversing valve (20); the two outlets of the material three-way reversing valve (20) are respectively connected to the first conveying pipeline and the second conveying pipeline; the outlet end of the first conveying pipeline is the iron particle outlet end, and the outlet end of the second conveying pipeline is the non-magnetic powder outlet end.

2. A device for removing iron particles by gradient using a multi-stage cyclone separator according to claim 1, characterized in that: The feeding mechanism comprises a raw material bin (4), a metering feeder (5), a three-way reversing valve (6) and a feed pipe (7) which are connected in sequence, wherein the inlet of the three-way reversing valve (6) is connected to the outlet of the metering feeder (5), the two outlets of the three-way reversing valve (6) are connected to two feed pipes (7), and the two feed pipes (7) are respectively connected to the air outlet pipe of the A series cyclone separator (24) and the second cyclone separator in the B series cyclone separator (25).

3. The device for removing iron particles by gradient using a multi-stage cyclone separator according to claim 1, characterized in that: Each group of magnetic components (14) has the same structure, and comprises a plurality of magnetic components arranged along the straight section and the outer circumferential direction of the cone of the cyclone separator, and each of the magnetic components comprises a telescopic component (14-1), a mounting plate (14-2) connected to the telescopic rod of the telescopic component (14-1), and a plurality of magnetic components (14-3) arranged on the mounting plate (14-2).

4. A device for removing iron particles by gradient using a multi-stage cyclone separator according to claim 3, characterized in that: The magnetic component (14-3) is an electromagnet or a permanent magnet adapted to the straight section and the outer side surface of the cone of each cyclone separator, and a rubber buffer layer (15) is provided between the straight section and the outer side surface of the cone of the cyclone separator and the magnetic component (14-3).

5. The device for removing iron particles by gradient using a multi-stage cyclone separator according to claim 2, characterized in that: The first conveying pipeline comprises a first conveying pipe (13-1), a first conveying flexible pipe (13-2) and a first flap valve (27) which are sequentially connected to the first outlet of the material three-way reversing valve (20); The second conveying pipeline comprises a second conveying pipe (13-3), a second conveying flexible pipe (13-4) and a second flap valve (21) which are sequentially connected to the second outlet of the material three-way reversing valve (20); The iron particle outlet ends of the first cyclone separator to the first cyclone separator are all connected to the iron particle collection bin (22) through a first discharge pipe (27-1), and the non-magnetic powder outlet end of the first cyclone separator is connected to the non-magnetic powder collection bin (23) through a second discharge pipe (21-1); When 3<i≤I, the non-magnetic powder outlet end of the (i-2)th cyclone separator is connected to the intermediate pipe member connected to the i-th cyclone separator through the second discharge pipe (21-1).

6. The device for removing iron particles by gradient using a multi-stage cyclone separator according to claim 1, characterized in that: A plurality of cyclone separators in the A series cyclone separators (24) and the B series cyclone separators (25) are mounted on a support platform (16), an extension ear (17) is provided on the outer wall of the straight section of the cyclone separator, a vibration damper (18) is provided between the top of the support platform (16) and the bottom of the extension ear (17), and a bin wall vibrator (19) is provided on the outer side of the cone of the cyclone separator.

7. The device for removing iron particles by gradient using a multi-stage cyclone separator according to claim 5, characterized in that: The induced draft mechanism comprises an air outlet three-way reversing valve (11), a bag dust collector (10), an induced draft fan (9) and a chimney (8) which are connected in sequence; The air outlet pipe of the first cyclone separator in the A series cyclone separator (24) and the B series cyclone separator (25) is respectively connected to the two inlets of the air outlet three-way reversing valve (11), and the outlet of the air outlet three-way reversing valve (11) is connected to the bag dust collector (10); The A series cyclone separators (24) and the B series cyclone separators (25) work alternately to complete continuous operation.

8. A method for removing iron particles using the device for removing iron particles by gradient using a multi-stage cyclone separator as claimed in claim 7, characterized in that: The method comprises the following steps: Step 1: Determine the number of cyclone separators in the A series cyclone separator and the B series cyclone separator and install them: Step 101, determining the number of cyclone separators in the A series cyclone separators and the B series cyclone separators as 1 according to the particle size and type of the powdery material to be processed; Step 102, connecting the air outlet of the second cyclone separator in the A series cyclone separator (24) to an outlet of the unloading three-way reversing valve (6) through a feed pipe (7); At the same time, the air outlet of the second cyclone separator in the B series cyclone separator (25) is connected to the other outlet of the unloading three-way reversing valve (6) through another feed pipe (7); Step 103, installing a plurality of groups of magnetic components (14) on the straight section and the outer side of the cone of one cyclone separator in the A series cyclone separator (24) and the B series cyclone separator (25); Step 2: Add powdered material into the feeding mechanism; Step 201, adding the powdered material to be processed into the raw material bin (4) in the feeding mechanism; Step 202: installing an iron particle collection bin (22) and a non-magnetic powder collection bin (23) in the A series cyclone separator (24) and the B series cyclone separator (25) and connecting them; Step 3: A series cyclone separators and B series cyclone separators are used to remove iron particles from powdered materials alternately: Step 301, operating the unloading three-way reversing valve (6) so that the air outlet of the second cyclone separator in the A series cyclone separator (24) is connected to the inlet of the unloading three-way reversing valve (6) through a feed pipe (7), and the B series cyclone separator (25) is not connected to the inlet of the unloading three-way reversing valve (6); The plurality of groups of magnetic components (14) outside the A series cyclone separator (24) are operated to work, and at the same time, the bottom of the A series cyclone separator (24), the second outlet of the material three-way reversing valve (20) and the second conveying pipeline are controlled to be connected; The air outlet pipe of the first cyclone separator in the A series cyclone separator (24) is connected to the outlet of the air outlet three-way reversing valve (11), and the air outlet pipe of the first cyclone separator in the B series cyclone separator (25) is not connected to the outlet of the air outlet three-way reversing valve (11); Step 302, operate the induced draft fan (9) connected to the A series cyclone separator (24) to allow air to be sucked in from the air inlet pipe (12), and pass through the multi-stage gradient of the A series cyclone separator (24) to remove iron particles, and the iron particle powder is adsorbed on the inner wall of the cyclone separator, and the non-magnetic powder that is not adsorbed on the inner wall of the cyclone separator enters the non-magnetic powder collection bin (23); Step 303, operating the unloading three-way reversing valve (6) so that the air outlet of the second cyclone separator in the A series cyclone separator (24) is disconnected from the inlet of the unloading three-way reversing valve (6) through a feed pipe (7), and the B series cyclone separator (25) is connected to the inlet of the unloading three-way reversing valve (6); The plurality of groups of magnetic components (14) outside the A series cyclone separator (24) are operated to stop working, and at the same time, the bottom of the A series cyclone separator (24), the first outlet of the material three-way reversing valve (20) and the first conveying pipeline are controlled to be connected; The air outlet pipe of the first cyclone separator in the A series cyclone separator (24) is not connected to the outlet of the air outlet three-way reversing valve (11), and the air outlet pipe of the first cyclone separator in the B series cyclone separator (25) is connected to the outlet of the air outlet three-way reversing valve (11); Step 304: When the bottom of the cyclone separator in the A series cyclone separator (24) is connected to the first outlet of the material three-way reversing valve (20), the iron particle powder adsorbed on the inner wall of the A series cyclone separator (24) passes through the bottom of the cyclone separator, the first outlet of the material three-way reversing valve (20), the first conveying pipe (13-1), the first conveying flexible pipe (13-2) and the first flap valve (27) to enter the iron particle collection bin (22) for collection; wherein the bin wall vibrator (19) arranged on the cone of the cyclone separator is operated to realize the vibration of the cyclone separator through the vibration damper (18) to accelerate the falling of the iron particle powder; At the same time, according to the method of step 302, the powdered material to be processed enters the B series cyclone separator (25) for multi-stage gradient iron removal; Step 305, the plurality of groups of magnetic components (14) outside the B series cyclone separator (25) are operated to not work, and the bottom of the cyclone separator in the B series cyclone separator (25) is operated to communicate with the first outlet of the material three-way reversing valve (20), so that the iron particle powder adsorbed on the inner wall of the cyclone separator passes through the bottom end of the cyclone separator, the first outlet of the material three-way reversing valve (20), the first conveying pipe (13-1), the first conveying flexible pipe (13-2) and the first flap valve (27) to enter the iron particle collection bin (22) for collection; At the same time, according to the method of step 302, the powdered material to be processed enters the A series cyclone separator (24) for multi-stage gradient iron removal; Step 306: Repeat steps 302 to 305 multiple times, so that the A series cyclone separators (24) and the B series cyclone separators (25) are used to remove iron particles in the powdery material in multiple stages in an alternating manner.

9. The method according to claim 8, characterized in that: Step 302, the specific process is as follows: Step 3021, operate the induced draft fan (9) connected to the A series cyclone separator (24) to allow air to be sucked in from the air inlet pipe (12), and at the same time, operate the powdered material to be processed in the raw material bin (4) to enter in sequence through the metering feeder (5), the unloading three-way reversing valve (6) and a feed pipe (7), and the air and the powdered material to be processed are mixed and enter the first cyclone separator through the inlet of the first cyclone separator; Step 3022, the powdery material to be processed falls along the first cyclone separator, and the air passes through the outlet three-way reversing valve (11), the bag dust collector (10), and the induced draft fan (9) connected in sequence, and is discharged from the chimney (8); At the same time, when the powdered material to be processed falls along the first cyclone separator, the plurality of groups of magnetic components (14) work to generate magnetically adsorbed iron particle powder on the inner wall of the first cyclone separator, and the non-magnetic powder not adsorbed on the inner wall of the first cyclone separator passes through the bottom end of the first cyclone separator, the second outlet of the material three-way reversing valve (20), and the non-magnetic powder port of the second conveying pipeline into the intermediate pipe, and continues to enter the second cyclone separator along with the air entering the intermediate pipe; Step 3023, the non-magnetic powder at the bottom of the first cyclone separator enters the second cyclone separator for secondary iron particle removal, the multiple groups of magnetic components (14) work to produce magnetically adsorbed iron particle powder on the inner wall of the second cyclone separator, and the non-magnetic powder not adsorbed on the inner wall of the second cyclone separator passes through the bottom of the second cyclone separator, the second outlet of the material three-way reversing valve (20), and the non-magnetic powder port of the second conveying pipeline into the intermediate pipe, and continues to enter the third cyclone separator along with the air entering the intermediate pipe; Step 3024, repeating step 3023 multiple times, after the first stage of the first cyclone separator, the iron particles are removed, and the non-magnetic powder that is not adsorbed on the inner wall of the first cyclone separator passes through the bottom end of the first cyclone separator, the second outlet of the material three-way reversing valve (20), and the non-magnetic powder port of the second conveying pipeline into the non-magnetic powder collection bin (23); wherein the iron particles are adsorbed on the inner wall of the cyclone separator.

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