Scrap steel grading crushing system

Abstract

The invention belongs to the technical field of waste steel crushing equipment, and particularly relates to a waste steel grading crushing system which comprises a grabbing module, a feeding conveyor, a feeding rolling machine, a first crusher, a first discharging conveyor, a first magnetic separation system, a second crusher, a second discharging conveyor, a second magnetic separation system and a finished product bin which are sequentially arranged. The horsepower of the first crusher is larger than that of the second crusher, the upper portions of the first crusher, the second crusher, the first magnetic separation system and the second magnetic separation system are all communicated with dust removal systems, and weighing sensors are arranged in the first discharging conveyor and the second discharging conveyor. By integrating and matching the waste steel crushing treatment lines with different horsepowers, the waste steel treatment efficiency and the waste steel treatment uniformity can be effectively improved, and remarkable substantive features are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of scrap steel crushing equipment, and in particular to a scrap steel classification crushing system. Background Art

[0002] Scrap steel refers to steel fragments, debris and steel products scrapped from equipment renewal discarded by the metallurgical industry and metal processing industry. It also includes steel packaging containers and scrapped vehicles recovered from urban garbage. Scrap steel is also a resource. Countries around the world have special units engaged in the recycling and utilization of scrap steel. The recycled scrap steel is mainly used for smelting and converted into recycled steel. Some of it is used to produce machinery and equipment or parts, tools and civilian appliances, realizing the circular use of resources. The recycling of scrap steel benefits the country and the people. It can not only save energy and protect the environment, but also avoid excessive consumption burden on the earth.

[0003] At present, there are two main types of scrap steel processing equipment: one is the baling and briquetting equipment. It is mainly used to process thin plates, wire rods and chips generated during mechanical processing to facilitate transportation and increase bulk density; the other is the hammer crushing equipment. It can be used to process heavy scrap steel and large components, breaking them into small pieces for easy entry into the furnace.

[0004] Hammer crusher mainly relies on impact energy to complete the material crushing operation. When the hammer crusher is working, the motor drives the rotor to rotate at high speed, and the material enters the crusher cavity evenly. The high-speed rotating hammer head impacts, shears, and tears the material to break the material. At the same time, the gravity of the material itself causes the material to rush from the high-speed rotating hammer head to the baffle and screen bar in the frame. The material larger than the screen hole size is retained on the screen plate and continues to be hit and ground by the hammer until it is crushed to the required discharge particle size and finally discharged from the machine through the screen plate.

[0005] For example, in the patent document with patent number CN201910515278.5 and titled "A Scrap Steel Crusher", the disclosed scheme includes a crushing chamber located in a casing, a toothed plate crushing part provided at the lower part of the crushing chamber, and a main shaft rotatably connected to the casing, a plurality of turntables are coaxially and fixedly installed on the main shaft at intervals, a plum blossom spacer installed on the main shaft is provided between the two turntables, a plurality of hammer heads are rotatably connected uniformly along the circumferential direction between the two turntables, a plurality of arc grooves are provided on the plum blossom spacer to form a plum blossom structure, when the hammer head rotates to the position closest to the plum blossom spacer, the hammer head extends into the arc groove and does not contact the plum blossom spacer, the hammer head can achieve 360° rotation between the two turntables, one end of the main shaft extends out of the casing and is connected to a driving device via a coupling, when encountering materials with higher hardness, the hammer head can automatically rotate 360° to protect the hammer head; the coupling is easy to reset, has stable performance, and is not easy to be damaged.

[0006] Although the above scrap steel crusher design reduces the wear probability of the hammer head and extends the service life of the hammer head, the processing speed is slow. Since the crushing effect of scrap steel is highly random, a longer crushing time is often required to increase the degree of crushing of the scrap steel, and it is impossible to ensure that the size of each fragment is uniform. It often requires other equipment for further crushing before it can be output to the next process. Summary of the invention

[0007] In order to solve the problem that the scrap steel crushing equipment currently on the market has a strong randomness in the crushing effect of scrap steel materials, a slow processing speed, and cannot ensure that the size of each fragment is uniform, and often requires other equipment for further crushing and processing, a scrap steel grading crushing system is provided.

[0008] The scrap steel grading and crushing system comprises a grabbing module, a loading conveyor, a feeding roller, a first crusher, a first discharging conveyor, a first magnetic separation system, a second crusher, a second discharging conveyor, a second magnetic separation system and a finished product silo which are arranged in sequence. The horsepower of the first crusher is greater than that of the second crusher. The first crusher, the second crusher, the first magnetic separation system and the second magnetic separation system are all connected to a dust removal system above them. The first discharging conveyor and the second discharging conveyor are both provided with weighing sensors.

[0009] Furthermore, the first discharging conveyor and the second discharging conveyor each include a front vibrating conveyor, a lifting conveyor belt and a rear vibrating conveyor which are connected in sequence.

[0010] Furthermore, the first magnetic separation system and the second magnetic separation system both include a magnetic drum and a drop hopper, the magnetic drum is connected to a magnetic material output machine, and the drop hopper is connected to a non-magnetic material output machine.

[0011] Furthermore, a suspended magnetic separator is arranged above the non-magnetic material output machine, and the output end of the suspended magnetic separator is connected to the magnetic material output machine.

[0012] Furthermore, a bidirectional conveyor belt is connected to the downstream of the first magnetic separation system, one end of the bidirectional conveyor belt is connected to the second crusher, and the other end is connected to the discharge processing conveyor line.

[0013] Furthermore, the discharge processing conveyor line is connected to the second magnetic separation system via a discharge vibrating conveyor.

[0014] Furthermore, the dust removal system includes an air suction port, a spark arrester, a cyclone dust collector, a bag dust collector, a fan and an exhaust pipe which are connected in sequence.

[0015] Furthermore, a stacking conveyor is arranged between the second magnetic separation system and the finished product silo, and the stacking conveyor includes a lifting stacking conveyor belt and an automatic rotating shaft. The automatic rotating shaft is connected to the front bottom of the lifting stacking conveyor belt, and a supporting driving wheel is connected to the middle lower side of the lifting stacking conveyor belt.

[0016] Furthermore, the first crusher and the second crusher are both provided with a main shaft, a plurality of pins are evenly installed on the outer side of the main shaft, more than one hammer is installed on the pin, and the hammers on adjacent pins are arranged on different vertical planes.

[0017] Furthermore, the outer sides of the feed roller, the first crusher and the second crusher are all surrounded by sound insulation baffles, and the input end of the second crusher is connected to a crushing and feeding mechanism.

[0018] The advantages of the present invention are: 1. Use high horsepower crusher to process thick and hard materials first; then use low horsepower crusher to process thin and brittle materials, shorten the crushing time and improve the crushing uniformity.

[0019] 2. Both the first crusher and the second crusher can operate independently, making it convenient to select the operating mode of the crushing system according to the source of the scrap steel raw materials.

[0020] 3. It has a high degree of automation, occupies a small area, and has low operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only 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.

[0022] Figure 1 This is a top view of the structure of the scrap steel classification and crushing system; Figure 2 This is the processing flow chart of the scrap steel classification and crushing system; Figure 3 This is the connection schematic diagram of the dust removal system; Figure 4 This is a simplified structural diagram of the dust removal system; Figure 5 This is a structural detail drawing of the stacking conveyor.

[0023] Figure 6 The cross-sectional structure diagram of the main axis; Figure 7 This is the first arrangement structure diagram of the hammer head on the pin; Figure 8 This is the second arrangement structure diagram of the hammer head on the pin shaft.

[0024] Figure ID: 101, material grabbing module; 102, feeding conveyor; 103, crushing and feeding mechanism; 2, feeding roller; 301, first crusher; 302, second crusher; 311, main shaft; 312, pin shaft; 313, hammer head; 401, first discharging conveyor; 402, first discharging conveyor; 411, front vibrating conveyor; 412, lifting conveyor belt; 413, rear vibrating conveyor; 501, first magnetic separation system; 502, second magnetic separation system; 511, Magnetic material output machine; 512, non-magnetic material output machine; 6, dust removal system; 601, air inlet; 602, spark arrester; 603, cyclone dust collector; 604, bag dust collector; 605, fan; 606, exhaust pipe; 7, stacking conveyor; 701, lifting stacking conveyor belt; 702, automatic rotating shaft; 703, supporting driving wheel; 8, finished product silo; 9, two-way conveyor belt; 10, discharge processing conveyor line; 11, discharge vibration conveyor; 12, sound insulation baffle. DETAILED DESCRIPTION

[0025] In order to solve the problem that the scrap steel crushing equipment currently on the market has a strong randomness in the crushing effect of scrap steel materials, a slow processing speed, and cannot ensure that the size of each fragment is uniform, and often requires other equipment for further crushing and processing, a scrap steel grading crushing system is provided.

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms such as "within", "in" and "one" etc. cited in this specification are only for the convenience of description and are not used to limit the scope of the present invention. Changes or adjustments in their relative relationships, without substantially changing the technical content, should also be regarded as the scope of the present invention, and it is necessary to make it clear in advance.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] like Figures 1 to 8 As shown, this embodiment provides a scrap steel grading and crushing system, including a grabbing module 101, a loading conveyor 102, a feeding roller 2, a first crusher 301, a first discharging conveyor 401, a first magnetic separation system 501, a second crusher 302, a second discharging conveyor 402, a second magnetic separation system 502 and a finished product bin 8 which are arranged in sequence. The horsepower of the first crusher 301 is 6000ph, and the horsepower of the second crusher 302 is 3000ph. The first crusher 301, the second crusher 302, the first magnetic separation system 501 and the second magnetic separation system 502 are all connected to the top of a dust removal system 6, and the first discharging conveyor 401 and the second discharging conveyor 402 are both provided with weighing sensors (not marked in the figure).

[0030] When the system is running, the grabbing module 101 grabs the scrap steel raw material from the raw material pile, and then inputs it into the crushing system through the feeding conveyor 102. The feeding roller 2 can adopt a double-drum feeding roller on the market to compress the scrap steel before crushing it to prevent the scrap steel from blocking the feed port of the crusher.

[0031] The first crusher 301 and the second crusher 302 of different horsepower have different processing effects on scrap steel. Specifically, the high-horsepower crusher can process thicker and harder materials, but the crushing speed is slower and the equipment wear is greater; while the low-horsepower crusher is suitable for processing thinner and brittle materials, which is more energy-efficient, but not suitable for processing thick and hard materials. Therefore, using a high-horsepower crusher to crush the thick and hard materials first and then using a low-horsepower crusher to process them again can reduce the operating time of the first crusher 301, help reduce the operating power consumption and equipment wear of the first crusher 301, and improve the crushing efficiency.

[0032] The crushed material is sent to the magnetic separation system to separate the non-magnetic material (usually non-steel) from the magnetic material. The two-stage magnetic separation ensures that the non-magnetic material is fully removed.

[0033] Since the scrap steel raw materials are generally old, a large amount of dust and other particulate pollutants will be released when they are crushed. Therefore, a dust removal system 6 needs to be set up to collect the particulate pollutants to avoid polluting the environment around the equipment.

[0034] The weighing sensor can be a belt scale on the market, so that the staff can monitor the output of the crushed scrap steel per unit time to confirm and adjust the operating status of the first crusher 301 and the second crusher 302, and discover equipment failure in time.

[0035] The first discharging conveyor 401 and the second discharging conveyor 402 each include a front vibrating conveyor 411, a lifting conveyor belt 412 and a rear vibrating conveyor 413 connected in sequence. The debris on the crushed scrap steel raw material can be loosened and separated during the vibration and lifting process, which is convenient for the magnetic separation system to screen out non-magnetic materials and promotes the dust removal system 6 to collect fine particles remaining on the scrap steel raw material fragments.

[0036] The first magnetic separation system 501 and the second magnetic separation system 502 both include a magnetic drum and a drop hopper, wherein the magnetic drum is connected to a magnetic material output machine 511, and the drop hopper is connected to a non-magnetic material output machine 512. A hanging magnetic separator is arranged above the non-magnetic material output machine 512, and the output end of the hanging magnetic separator is connected to the magnetic material output machine 511.

[0037] The first magnetic separation system 501 and the second magnetic separation system 502 can both adopt drum magnetic separator products on the market. The crushed materials are sent to the magnetic drum through the discharge conveyor. The ferrous metals are adsorbed on the magnetic drum under the action of magnetic force and then conveyed to the magnetic material output machine 511. The non-magnetic materials directly pass through the magnetic drum and fall into the non-magnetic material output machine 512 for output.

[0038] The suspended magnetic separator can use the self-unloading iron remover and other equipment on the market, and can be equipped with a conveyor belt to automatically transport the magnetic materials back to the magnetic material output machine 511.

[0039] A bidirectional conveyor belt 9 is also connected downstream of the first magnetic separation system 501, one end of which is connected to the second crusher 302, and the other end is connected to the discharging processing conveyor line 10. By setting the running direction of the bidirectional conveyor belt 9, the staff can quickly adjust the equipment to perform secondary crushing, or only perform one-time crushing by the first crusher 301 and then output from the discharging processing conveyor line 10.

[0040] The discharge processing conveyor line 10 is connected to the second magnetic separation system 502 via the discharge vibrating conveyor 11. The scrap steel raw materials crushed only by the first crusher 301 can be conveyed to the second magnetic separation system 502 for secondary magnetic separation as needed, making full use of the equipment on the system and improving the system integration, without the need to set up additional processing equipment when only the first crusher 301 is running.

[0041] The dust removal system 6 includes an air suction port 601, a spark arrester 602, a cyclone dust collector 603, a bag dust collector 604, a fan 605 and an exhaust pipe 606 which are connected in sequence.

[0042] The spark arrester 602 can capture and extinguish the high temperature and sparks generated when the crusher is running; the cyclone dust collector 603 uses the centrifugal force brought by the rotation to blast the dust onto the inner wall, causing the dust to fall along the inner wall and be discharged from the discharge port at the bottom of the cyclone dust collector 603; the bag dust collector 604 is a secondary dust collector that filters and purifies the particulate dust, and the purified airflow will be discharged into the atmosphere along with the fan 605.

[0043] A stacking conveyor 7 is provided between the second magnetic separation system 502 and the finished product bin 8, and the stacking conveyor 7 comprises a lifting stacking conveyor belt 701 and an automatic rotating shaft 702, wherein the automatic rotating shaft 702 is connected to the front end bottom of the lifting stacking conveyor belt 701, and a supporting moving wheel 703 is connected to the lower middle side of the lifting stacking conveyor belt 701. The automatic rotating shaft 702 cooperates with the supporting moving wheel 703 to enable the output end of the stacking conveyor 7 to move in a fan shape, thereby realizing large-scale stacking of crushed steel in the finished product bin 8, reducing the frequency of scrap steel transportation, and alleviating the workload.

[0044] The first crusher 301 and the second crusher 302 are both provided with a main shaft 311, and six pins 312 are evenly installed outside the main shaft 311. The pins 312 are each provided with more than one hammer 313, and the hammers 313 on adjacent pins 312 are arranged on different vertical planes. The staggered and relatively well-distributed hammers 313 help to improve the crushing efficiency.

[0045] like Figure 7The hammer head 313 is installed at the C2 and H2 positions of the pin A1; the E2 position of the pin B1; the B2, F2 and I2 positions of the pin C1; the D2 and G2 positions of the pin D1; the F2 position of the pin E1; and the A2, E2 and J2 positions of the pin F1.

[0046] like Figure 8 The hammer head 313 is installed at the A2, F2 and J2 positions of the pin A1; the D2 and G2 positions of the pin B1; the C2, F2 and H2 positions of the pin C1; the B2, E2 and I2 positions of the pin D1; the D2 and G2 positions of the pin E1; and the C2, E2 and H2 positions of the pin F1.

[0047] The outsides of the feed roller 2, the first crusher 301 and the second crusher 302 are all surrounded by sound insulation baffles 12. Since the scrap steel will make a lot of noise when rolling and colliding, it is necessary to set the sound insulation baffles 12 to absorb the noise and reduce the impact of the noise generated during the operation of the equipment on the surrounding staff and the environment.

[0048] The input end of the second crusher 302 is connected to a crushing and feeding mechanism 103. The second crusher 302 with low horsepower can also crush scrap steel independently, so that users can select three operation modes of the crushing system according to the source of scrap steel raw materials.

[0049] The three modes are: 1. The first crusher 301 and the second crusher 302 perform graded crushing; 2. The first crusher 301 performs crushing alone; 3. The second crusher 302 performs crushing alone.

[0050] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation modes. It cannot be considered that the specific implementation of the present invention is limited to these descriptions. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. Scrap steel grading and crushing system, characterized by: It includes a grabbing module, a loading conveyor, a feeding roller, a first crusher, a first discharging conveyor, a first magnetic separation system, a second crusher, a second discharging conveyor, a second magnetic separation system and a finished product silo which are arranged in sequence. The horsepower of the first crusher is greater than that of the second crusher. The first crusher, the second crusher, the first magnetic separation system and the second magnetic separation system are all connected to a dust removal system above them. The first discharging conveyor and the second discharging conveyor are both provided with weighing sensors.

2. The scrap steel classification and crushing system according to claim 1, characterized in that: The first discharging conveyor and the second discharging conveyor each include a front vibrating conveyor, a lifting conveyor belt and a rear vibrating conveyor which are connected in sequence.

3. The scrap steel classification and crushing system according to claim 1, characterized in that: The first magnetic separation system and the second magnetic separation system both include a magnetic drum and a drop hopper. The magnetic drum is connected to a magnetic material output machine, and the drop hopper is connected to a non-magnetic material output machine.

4. The scrap steel classification and crushing system according to claim 3, characterized in that: A suspended magnetic separator is arranged above the non-magnetic material output machine, and the output end of the suspended magnetic separator is connected to the magnetic material output machine.

5. The scrap steel classification and crushing system according to claim 1, characterized in that: A bidirectional conveyor belt is also connected to the downstream of the first magnetic separation system, one end of the bidirectional conveyor belt is connected to the second crusher, and the other end is connected to the discharge processing conveyor line.

6. The scrap steel classification and crushing system according to claim 5, characterized in that: The discharging processing conveying line is connected to the second magnetic separation system through a discharging vibrating conveyor.

7. The scrap steel classification and crushing system according to claim 1, characterized in that: The dust removal system comprises an air suction port, a spark arrester, a cyclone dust collector, a bag dust collector, a fan and an exhaust pipe which are connected in sequence.

8. The scrap steel classification and crushing system according to claim 1, characterized in that: A stacking conveyor is arranged between the second magnetic separation system and the finished product silo, and the stacking conveyor includes a lifting stacking conveyor belt and an automatic rotating shaft. The automatic rotating shaft is connected to the front bottom of the lifting stacking conveyor belt, and a supporting driving wheel is connected to the middle lower side of the lifting stacking conveyor belt.

9. The scrap steel classification and crushing system according to claim 1, characterized in that: The first crusher and the second crusher are both provided with a main shaft, a plurality of pins are evenly installed on the outer side of the main shaft, more than one hammer is installed on the pin, and the hammers on adjacent pins are arranged on different vertical planes.

10. The scrap steel classification and crushing system according to claim 1, characterized in that: The outer sides of the feed roller, the first crusher and the second crusher are all surrounded by sound insulation baffles, and the input end of the second crusher is connected to a crushing and feeding mechanism.

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