A vertical mill powder selection and iron removal device

Abstract

The present invention relates to the field of iron removal technology of vertical mills, and in particular to a vertical mill powder selection and iron removal device to alleviate the problem that the existing iron removal devices have poor effects and affect the flow of the wind field in the vertical mill, resulting in reduced operating efficiency. The device includes a drive component, an adsorption component and a chip removal component; a plurality of drive components and adsorption components are respectively arranged in a circular array on the side wall of the shell of the powder selection machine; the magnetic head of the adsorption component is plugged into the shell and extends into the powder selection machine; the drive component is fixedly connected to the adsorption component and can control the up and down movement of the magnetic head; the chip removal component can transfer the iron chips in the adsorption component. The drive component controls the up and down movement of the magnetic head, regularly brings the adsorbed iron chips out of the shell, and centrally processes them through the chip removal component, so that the magnetic head is small in size and close to the inner wall of the shell, does not interfere with the wind speed and flow field, and avoids the negative impact of traditional iron removal devices on the wind field of the vertical mill, thereby improving the grinding efficiency and reducing equipment wear.

Description

Technical Field

[0001] The invention relates to the technical field of vertical mill iron removal, in particular to a vertical mill powder selection and iron removal device. Background Art

[0002] The slag and steel slag produced by steel mills during the iron and steel making process often contain incompletely separated metallic iron.

[0003] Although this metallic iron has been crushed, sorted and recycled many times, its content is still between 0.5% and 8%.

[0004] For slag and steel slag used as cement materials, these metallic irons are often ground into fine powder, but their actual value is not fully reflected.

[0005] Due to the presence of iron-containing particles, the fine powder entering the powder selection area is difficult to meet the quality standards of the vertical mill finished product and is often blocked by the rotor and falls into the ash hopper. Multiple grinding not only reduces the overall grinding efficiency of the vertical mill, but also increases the wear of the roller sleeve and liner.

[0006] Therefore, improving the metal iron recovery efficiency of the vertical mill has important economic value and practical significance.

[0007] Vertical mill is a kind of grinding equipment which integrates crushing, grinding, drying and powder selection functions. It is widely used in the production of fine powders such as slag and steel slag.

[0008] Vertical mill has the advantages of low power consumption, good sealing, small footprint and simple process.

[0009] However, the prior art slag vertical mill iron removal device is usually arranged above the grinding disc and between two grinding rollers. This arrangement has several disadvantages.

[0010] Firstly, the position of the iron removal device will affect the material on the grinding disc to be thrown toward the wind ring, thereby interfering with the wind ring's air outlet area and wind speed, affecting the smoothness of the internal flow field of the vertical mill and reducing the stability of the vertical mill.

[0011] Secondly, the material on the grinding disc tends to form a layer of a certain thickness, in which the iron-containing particles may be wrapped in other substances, or mixed with other particles, or buried at the bottom of the material layer. These situations may hinder the effective adsorption of iron-containing particles by the iron removal device and reduce the iron removal effect. Summary of the invention

[0012] The invention provides a vertical mill powder selection and iron removal device to alleviate the problem that the existing iron removal device has poor effect and affects the flow of wind field in the vertical mill, resulting in reduced operation efficiency.

[0013] In order to alleviate the above technical problems, the technical solution provided by the present invention is:

[0014] A vertical mill powder selection and iron removal device, comprising a driving component, an adsorption component and a chip removal component;

[0015] A plurality of driving components and adsorption components are respectively arranged in a circular array on the side wall of the shell of the powder classifier;

[0016] The magnetic head of the adsorption assembly is plugged into the housing and extends into the powder selector;

[0017] The driving component is fixedly connected to the adsorption component and can control the up and down movement of the magnetic head;

[0018] The chip removal component can transfer the iron chips in the adsorption component.

[0019] Furthermore,

[0020] The adsorption assembly includes a magnetic rod, a sheath and a guide sleeve;

[0021] The sheath is arranged on the side wall of the shell and is communicated with the shell;

[0022] The guide sleeve is arranged on the upper part of the sheath;

[0023] The upper part of the magnetic rod is slidably connected with the guide sleeve;

[0024] The lower part of the magnetic rod is plugged into the sheath.

[0025] Furthermore,

[0026] The chip removal assembly includes a scraper and an inner cylinder;

[0027] The scraper is arranged between the guide sleeve and the sheath, and is sleeved with the magnetic rod;

[0028] The inner cylinder is respectively connected with the scraper and the sheath, and the bottom is fixedly connected with the shell;

[0029] There is a gap between the scraper and the sheath;

[0030] The inner cylinder has an opening corresponding to the interval on one side away from the axis of the shell.

[0031] Furthermore,

[0032] The lower part of the scraper is in a trumpet shape that gradually expands outwards from top to bottom.

[0033] Furthermore,

[0034] The upper part of the sheath has an inclined surface which gradually slopes downward from a side close to the axis of the shell to a side away from the axis of the shell;

[0035] The side of the inclined surface away from the axis of the shell body abuts against the lower part of the opening.

[0036] Furthermore,

[0037] The chip removal assembly also includes an outer cylinder and a transfer tube;

[0038] The outer cylinder is sleeved with the inner cylinder and fixedly connected with the shell;

[0039] There is a cavity between the outer cylinder and the inner cylinder;

[0040] The transfer pipe is communicated with a side of the outer cylinder away from the axis of the shell.

[0041] Furthermore,

[0042] It also includes tube chain machines;

[0043] The pipe chain machine is connected with each transfer pipe in turn.

[0044] Furthermore,

[0045] The driving assembly includes a driving motor, an electric push rod and a connecting rod;

[0046] The output end of the driving motor is connected to the electric push rod gear;

[0047] The connecting rod is arranged on the upper part of the adsorption assembly and surrounds the shell;

[0048] The connecting rod is hinged to each electric push rod in turn;

[0049] The driving motor can control the electric push rod to drive the connecting rod to move up and down in the vertical direction.

[0050] Furthermore,

[0051] The top of each magnetic bar is detachably connected to the connecting rod.

[0052] Furthermore,

[0053] Also includes storage box;

[0054] The storage box is communicated with the tube chain machine.

[0055] The beneficial effects of the neutral grinding powder separation and iron removal device of the present invention are analyzed as follows:

[0056] The device includes a driving component, an adsorption component and a chip removal component. The driving component and the adsorption component are arranged in a circular array on the side wall of the shell, and the magnetic head of the adsorption component can be vertically inserted into the vertical mill to continuously adsorb iron chips in the suspended material.

[0057] The drive assembly controls the up and down movement of the magnetic head, regularly brings the adsorbed iron chips out of the shell, and centrally processes them through the chip removal assembly, so that the magnetic head is small in size and close to the inner wall of the shell, without interfering with the wind speed and flow field, avoiding the negative impact of traditional iron removal devices on the wind field of the vertical mill, thereby improving the grinding efficiency and reducing equipment wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0059] Figure 1 A schematic diagram of the main structure of a vertical mill powder selection and iron removal device provided in an embodiment of the present invention;

[0060] Figure 2 A schematic diagram of a top view of a vertical mill powder selection and iron removal device provided in an embodiment of the present invention;

[0061] Figure 3 It is a cross-sectional schematic diagram of an adsorption component and a chip removal component;

[0062] Figure 4 It is a partial enlarged schematic diagram of the chip removal component;

[0063] Figure 5 This is a schematic diagram of the iron filings discharge path.

[0064] icon:

[0065] 100-driving assembly; 110-driving motor; 120-electric push rod; 130-connecting rod;

[0066] 200-adsorption component; 210-magnetic rod; 220-sheath; 221-inclined surface; 230-guide sleeve;

[0067] 300-chip removal assembly; 310-chip scraper; 320-inner cylinder; 321-opening; 330-interval; 340-outer cylinder; 350-transfer tube; 360-cavity;

[0068] 400-housing;

[0069] 500-tube chain machine;

[0070] 600 - Storage box. DETAILED DESCRIPTION

[0071] The existing iron removal device is usually located above the grinding disc and between the grinding rollers, which will interfere with the material being thrown toward the wind ring, thereby affecting the wind ring's air outlet area and wind speed, and reducing the flow field stability of the vertical mill.

[0072] In addition, the material layer on the grinding disc may encapsulate or mix with iron-containing particles, making it difficult for the iron removal device to effectively absorb these particles.

[0073] As a result, the grinding efficiency of the vertical mill is reduced, the wear of the roller sleeve and liner is aggravated, and the actual value of the micro powder is not fully reflected.

[0074] In view of this, if Figures 1 to 5 As shown, this solution provides a vertical mill powder selection and iron removal device to alleviate the above problems.

[0075] The device includes a driving assembly 100, an adsorption assembly 200 and a chip removal assembly 300;

[0076] A plurality of driving components 100 and adsorption components 200 are respectively arranged in a circular array on the side wall of the housing 400 of the powder classifier;

[0077] The magnetic head of the adsorption assembly 200 is plugged into the housing 400 and extends into the powder selection machine;

[0078] The driving assembly 100 is fixedly connected to the adsorption assembly 200 and can control the up and down movement of the magnetic head;

[0079] The chip removal assembly 300 can transfer the iron chips in the adsorption assembly 200 .

[0080] After the vertical mill has been working normally for a period of time, the interior of the shell 400 will be filled with suspended materials containing iron powder. At this time, the driving component 100 will control the magnetic head of the adsorption component 200 to be vertically inserted into the powder classifier along the side wall of the shell 400. During the continuous operation of the vertical mill, the magnetic head will continuously absorb the iron filings in the shell 400. The driving component 100 will control the magnetic head to rise according to the predetermined time, and then take the iron filings out of the shell 400, and then transfer the iron filings through the chip removal component 300 for centralized processing.

[0081] In this solution, the adsorption component 200 has a compact structure, with only the magnetic head part inserted into the vertical mill. The magnetic head is small in size and close to the inner wall of the shell 400, which will not affect the wind speed, wind direction and flow field inside the vertical mill, thereby improving the operating efficiency of the vertical mill.

[0082] Regarding the shape and structure of the adsorption component 200, Figure 1 , Figure 3 and Figure 4 As shown:

[0083] The adsorption assembly 200 includes a magnetic rod 210, a sheath 220 and a guide sleeve 230;

[0084] The sheath 220 is disposed on the side wall of the housing 400 and communicates with the housing 400;

[0085] The guide sleeve 230 is disposed on the upper portion of the sheath 220;

[0086] The upper portion of the magnetic bar 210 is slidably connected to the guide sleeve 230;

[0087] The lower portion of the magnetic rod 210 is plugged into the sheath 220 .

[0088] Specifically, the upper part of the shell 400 has an annular slope, and a plurality of adsorption components 200 are arranged on the annular slope in the form of an annular array. The upper and lower ends of the guide sleeve 230 are provided with sealing rings to avoid problems such as overflow of iron filings or materials in the powder selector due to pressure changes during operation, causing environmental pollution, and affecting production and personnel safety. When the magnetic rod 210 rises to the highest point, the bottom of the magnetic rod 210 is still connected to the guide sleeve 230, which makes the descending action of the magnetic rod 210 smoother on the one hand, and also has a sealing effect on the other hand. The sealing effect is improved to avoid leakage and affect the normal operation of the powder classifier; the sealing ring can be installed in a detachable manner such as snap-on, sleeve-on, etc., so as to facilitate quick replacement during maintenance; the sheath 220 is made of wear-resistant non-magnetic material. Since the outer diameter of the magnetic rod 210 will increase after absorbing iron filings, there is a certain distance between the sheath 220 and the magnetic rod 210, so that the sheath 220 does not affect the magnetic rod 210 from absorbing iron filings, and can also protect the magnetic rod 210 from hitting the shell 400 under abnormal working conditions, thereby avoiding damage to the powder classifier.

[0089] Regarding the shape and structure of the chip removal assembly 300, as shown in FIG. Figure 1 , Figure 4 and Figure 5 As shown:

[0090] The chip removal assembly 300 includes a scraper 310 and an inner cylinder 320;

[0091] The scraper 310 is disposed between the guide sleeve 230 and the sheath 220 and is sleeved with the magnetic rod 210;

[0092] The inner cylinder 320 is respectively sleeved with the scraper 310 and the sheath 220, and the bottom is fixedly connected with the housing 400;

[0093] There is a gap 330 between the scraper 310 and the sheath 220;

[0094] The inner cylinder 320 has an opening 321 corresponding to the space 330 on a side away from the axis of the housing 400 .

[0095] Specifically, the scraper 310 is made of wear-resistant non-magnetic material. The scraper 310 is arranged on the upper part of the sleeve 220. An appropriate gap is set between the scraper 310 and the magnetic rod 210. When the magnetic rod 210 that absorbs iron filings rises, the iron filings are blocked by the gap and fall down, visually forming the effect of being scraped off by the scraper 310. When a certain amount of iron filings accumulate, they are discharged outward from the opening 321.

[0096] In this embodiment, the lower part of the scraper 310 is in the shape of a trumpet that gradually expands outward from top to bottom, so that the scraper 310 and the magnetic rod 210 have a balanced transition contact, avoiding transitional wear caused by the offset of the magnetic rod 210 (such as one side absorbing more iron filings, causing the magnetic rod 210 to tilt to one side).

[0097] In this embodiment, the upper portion of the sheath 220 has an inclined surface 221 which gradually slopes downward from a side close to the axis of the housing 400 to a side away from the axis of the housing 400;

[0098] A side of the inclined surface 221 away from the axis of the housing 400 abuts against a lower portion of the opening 321 .

[0099] Specifically, the inclined surface 221 is smoothly connected to the opening 321, and there is no gap at the connection between the inclined surface 221 and the opening 321. When the scraper 310 scrapes off the iron filings on the magnetic rod 210, most of the iron filings will form small lumps and fall on the inclined surface 221, and slide or roll along the inclined surface to the opening 321.

[0100] In this solution, the chip removal assembly 300 further includes an outer cylinder 340 and a transfer tube 350;

[0101] The outer cylinder 340 is sleeved with the inner cylinder 320 and fixedly connected with the housing 400;

[0102] A cavity 360 is provided between the outer cylinder 340 and the inner cylinder 320;

[0103] The transfer pipe 350 is communicated with a side of the outer cylinder 340 away from the axis of the housing 400 .

[0104] Specifically, the iron filings discharged from the opening 321 will fall into the cavity 360 and be discharged outward along the transfer pipe 350 communicated with the cavity 360 .

[0105] In this solution, a tube chain machine 500 is also included;

[0106] The pipe chain machine 500 is in communication with each transfer pipe 350 in sequence.

[0107] Specifically, the tube chain machine 500 and the transfer pipe 350 can be connected by flanges, and a sealing gasket is installed between the flanges to prevent internal substances from overflowing. The tube chain machine 500 is arranged around the shell 400 and relies on the motor drive inside the tube chain machine 500 to collect iron filings in a centralized manner.

[0108] Regarding the shape and structure of the drive assembly 100, Figure 1 , Figure 2 and Figure 5 As shown:

[0109] The driving assembly 100 includes a driving motor 110 , an electric push rod 120 and a connecting rod 130 ;

[0110] The output end of the driving motor 110 is gear-connected to the electric push rod 120;

[0111] The connecting rod 130 is disposed on the upper portion of the adsorption assembly 200 and surrounds the housing 400;

[0112] The connecting rod 130 is hinged to each electric push rod 120 in turn;

[0113] The driving motor 110 can control the electric push rod 120 to drive the connecting rod 130 to move up and down in the vertical direction.

[0114] Specifically, the support of the electric push rod 120 is fixed to the shell 400 by welding, and the electric push rod 120 and the support are connected by a hinge, so that the electric push rod 120 can swing around the support within a certain range; the electric push rod 120 is hinged to the connecting rod 130 through the telescopic rod at the upper end, and the driving motor 110 of each driving assembly 100 simultaneously controls the rise and fall of the electric push rod 120 according to the set operating interval and speed.

[0115] In this solution, the top of each magnetic bar 210 is detachably connected to the connecting rod 130, so as to facilitate disassembly and inspection during maintenance and timely replacement.

[0116] In this solution, a storage box 600 is also included;

[0117] The storage box 600 is in communication with the tube chain machine 500 . The storage box 600 is disposed at the output end of the tube chain machine 500 and can centrally collect the iron chips discharged by each chip removal assembly 300 .

[0118] This solution has at least the following beneficial effects:

[0119] This solution provides a vertical mill powder selection and iron removal device, which is intended to solve various problems existing in the existing iron removal devices in the vertical mill operation.

[0120] Traditional iron removal devices are usually installed above the grinding disc or between the grinding rollers, which will interfere with the flow of materials and further affect the air outlet area and wind speed of the wind ring, thereby reducing the flow field stability of the vertical mill.

[0121] In addition, these devices can easily cause iron-containing particles to be wrapped or mixed with the material layer on the grinding disc, resulting in poor iron removal effect, ultimately affecting the grinding efficiency of the vertical mill, accelerating the wear of the roller sleeve and liner, and reducing the actual value of the micro powder.

[0122] The device mainly includes a driving component 100 , an adsorption component 200 and a chip removal component 300 .

[0123] A plurality of driving components 100 and adsorption components 200 are arranged in a circular array on the side wall of the shell 400 of the powder classifier. The magnetic head of the adsorption component 200 is inserted into the powder classifier and can be vertically inserted along the side wall of the shell 400 when the vertical mill is working to continuously adsorb iron filings.

[0124] The driving assembly 100 controls the up and down movement of the magnetic head and brings the iron chips out of the housing according to the set time, and is processed centrally by the chip removal assembly.

[0125] Compared with the traditional device, the adsorption assembly 200 of the present solution has a compact structure, and only the magnetic head part is inserted into the vertical mill, which will not interfere with the wind speed and wind direction, thereby improving the operating efficiency of the vertical mill.

[0126] When the magnetic rod 210 rises to the highest point, the bottom thereof keeps in contact with the guide sleeve 230, thereby ensuring smooth movement and sealing effect and avoiding leakage problems.

[0127] The chip removal assembly 300 scrapes off the iron chips through the scraper 310, and transfers them to the storage box 600 through the transfer pipe 350 and the pipe chain machine 500 for further processing and collection.

[0128] The tube chain machine 500 is arranged around the shell and is driven by a motor to centrally collect iron chips, ensuring the continuity and safety of production.

[0129] In addition, the electric push rod 120 and the connecting rod 130 system in the driving assembly 100 make the movement of the adsorption assembly 200 more precise and efficient.

[0130] The top of each magnetic bar 210 is detachably connected to facilitate maintenance and replacement.

[0131] Ultimately, this device not only improved the iron removal effect, but also optimized the operating efficiency and equipment life of the vertical mill, effectively reducing interference and losses in the production process.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vertical mill powder selection and iron removal device, characterized in that: It comprises a driving component (100), an adsorption component (200) and a chip removal component (300); The plurality of driving components (100) and the adsorption components (200) are respectively arranged in a circular array on the side wall of a housing (400) of the powder classifier, the upper portion of the housing (400) has an annular inclined surface, and the plurality of adsorption components (200) are arranged in a circular array on the annular inclined surface; The magnetic head of the adsorption component (200) is plugged into the housing (400) and extends into the powder classifier; The driving component (100) is fixedly connected to the adsorption component (200) and is capable of controlling the magnetic head to move up and down; The chip removal component (300) is capable of transferring iron chips in the adsorption component (200); The adsorption assembly (200) comprises a magnetic rod (210), a sheath (220) and a guide sleeve (230); The protective sleeve (220) is arranged on a side wall of the housing (400) and is in communication with the housing (400); The guide sleeve (230) is arranged on the upper part of the protective sleeve (220); The upper portion of the magnetic rod (210) is slidably connected to the guide sleeve (230); The lower portion of the magnetic rod (210) is plugged into the sheath (220); The chip removal assembly (300) comprises a chip scraper (310) and an inner cylinder (320); The scraper (310) is arranged between the guide sleeve (230) and the protective sleeve (220), and is sleeved with the magnetic rod (210); The inner cylinder (320) is respectively sleeved with the scraper (310) and the protective sleeve (220), and the bottom is fixedly connected with the housing (400); A gap (330) is provided between the scraper (310) and the sheath (220); The inner cylinder (320) has an opening (321) corresponding to the space (330) on a side away from the axis of the shell (400); The lower part of the scraper (310) is in a trumpet shape that gradually expands outwards from top to bottom; The upper portion of the sheath (220) has an inclined surface (221) which gradually slopes downward from a side close to the axis of the shell (400) to a side away from the axis of the shell (400); The side of the inclined surface (221) away from the axis of the shell (400) abuts against the lower part of the opening (321); The chip removal assembly (300) further comprises an outer cylinder (340) and a transfer tube (350); The outer cylinder (340) is sleeved with the inner cylinder (320) and fixedly connected to the housing (400); A cavity (360) is provided between the outer cylinder (340) and the inner cylinder (320); The transfer pipe (350) is in communication with a side of the outer cylinder (340) away from the axis of the shell (400).

2. The vertical mill powder selection and iron removal device according to claim 1 is characterized in that: Also included are tube chain machines (500); The pipe chain machine (500) is connected to each of the transfer pipes (350) in sequence.

3. The vertical mill powder selection and iron removal device according to claim 2 is characterized in that: The driving assembly (100) comprises a driving motor (110), an electric push rod (120) and a connecting rod (130); The output end of the driving motor (110) is gear-connected to the electric push rod (120); The connecting rod (130) is arranged on the upper part of the adsorption assembly (200) and surrounds the shell (400); The connecting rod (130) is hingedly connected to each of the electric push rods (120) in sequence; The driving motor (110) can control the electric push rod (120) to drive the connecting rod (130) to move up and down in a vertical direction.

4. The vertical mill powder selection and iron removal device according to claim 3 is characterized in that: The top of each magnetic bar (210) is detachably connected to the connecting rod (130).

5. The vertical mill powder selection and iron removal device according to claim 4 is characterized in that: Also included is a storage box (600); The storage box (600) is in communication with the tube chain machine (500).

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