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Counter crusher selection example
The impact crusher produced in China can be roughly divided into two types according to the general use (PF type) and coal type (PFD or PFM type), and each has about 10 specifications. Ordinary impact crusher can be used for ore processing , chemical, cement, construction, refractory materials, ceramics, glass and other industrial sectors to break medium hardness of ore, rock and slag, etc., of which single rotor is generally used for medium and fine crush, double rotor Used as coarse crushing and single-stage crushing. The impact crusher for coal is mainly used in coal-fired power plants and coal mines, and generally only has a single rotor.
China's impact crusher manufacturing plants mainly include heavy, medium and heavy, heavy, Shangjian, Dahua Heavy Machinery, Chaozhong, Shen Mine, Shan Mine, Shenji, Wanquan Mine, South Mine, Zhejiang Mine, Yankuang, etc. . Among them, the largest manufacturer and the largest output is the PF1007 impact crusher, which has reasonable structure and good performance and can be widely used for crushing various medium hardness materials.
Model specification meaning 2PF1010: 2 - double rotor (single rotor not injected), P - crusher, F - counterattack, 10 - rotor diameter (dm). 10 - rotor length (dm). Coal is indicated as PFD or PFM, and limestone is indicated as PFS. In addition, there are some customary representations, such as the PF1007 type PF1000×700.
The following describes the impact crushers produced by each factory.
1. The factory is the earliest manufacturer of impact crusher in China. It is still the main factory for manufacturing such crushing equipment in China. Its products include PF single-rotor impact crusher and 2PF double-rotor impact crusher. , PFD type coal single rotor impact crusher and PFJ type single rotor impact crusher, their technical performance are listed in Tables 1-4. These crushers are available in left and right installations, that is, the machine-to-machine feed port is prevailing. The motor is “left-loaded†on the left side and “right-loaded†on the left side, which can be selected by the user as needed. The PFJ crusher is mainly used for crushing coke in coking plants, and can also crush low-hard brittle materials such as coal.
2. Zhongzhong The factory is the main manufacturer of PF type and 2PF type impact crusher in China. The technical performance of the impact crusher is listed in Table 5. The shape and installation dimensions of the PF0504 and PF1007 impact crushers are respectively The shape and installation dimensions of the 2PF1010 and 2PF1212 impact crushers shown in Figures 1 and 2 are shown in Figures 3 to 5, respectively.
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3. Heavy The plant is also the main manufacturer of impact crushers. There are 5 kinds of products. The technical performance is listed in Table 6. The equipment shape and installation dimensions are shown in Figure 6 and Table 7, respectively.
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4. Shan Mine The factory produces 4 specifications of PF single-rotor impact crusher, which can be used for crushing various materials. The main technical performances are listed in Table 8. The equipment shape and installation base dimensions are shown in Figures 7 and 8, respectively. . In recent years, the plant has also produced 2PF double-rotor impact crusher, and its technical parameters are also shown in Table 8. [next]
5. After the heavy-duty crusher produced by the factory, it has undergone some improvements and some have been comprehensively improved. For example, PF1000×700 type impact crusher, its hammer material changed from ZGMn13 to ZGMn12CrNiMo, the service life of the plate hammer is doubled; the material of the door guard is changed from the original HT200 to ZGMn13, and the service life of the door guard is increased several times. . Another example is the PF1250×1000 impact crusher. After comprehensive improvement, the discharge size is reduced from the original -50mm to -20mm, which greatly improves the service life by improving the material of the main wear parts. The 2PF double-rotor impact crusher of the plant uses a hydraulic system that allows the rear upper body to be opened, stopped and closed safely and smoothly, which makes it easier to replace consumable parts and overhaul.
The single-rotor and double-rotor impact crushers of the plant and their technical performance are listed in Tables 9, 10, and the dimensions of the equipment are shown in Figures 9-12. [next]
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6. Zhejiang Mine The impact crusher and technical performance produced by the plant are listed in Table 11. The shape and installation dimensions of the PE0504 impact crusher are shown in Figure 13. The installation dimensions of the PF1007 impact crusher are shown in Figure 14.
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7. The technical performance of the impact crusher produced by sinking machine and sinking mine is listed in Tables 12 and 13, respectively.
8. The company built a variety of impact crushers, the common feature is that it can break hard rock, using keyless connection and high chrome plate hammer, hydraulic or manual opening method, and has a unique counter-attack liner. The PF-I type impact crusher can process materials with a side length of 100~500mm, and its compressive strength can be as high as 350MPa. It has the advantages of large crushing ratio and cubic particles after crushing.
The PF-II type impact crusher is suitable for crushing medium and hard materials, such as limestone crushing in cement plants, with the advantages of large production capacity and small discharge size.
The PF-III type impact crusher is suitable for concrete crushing and has the advantages of high feed specifications and high processing capacity. PF-V type impact crusher is suitable for hard materials, such as basalt rock crushing with compressive strength up to 350MPa, and its discharge granularity is relatively small, especially suitable for the preparation of pavement stone.
The PF type impact crusher is suitable for single-stage crushing in cement plants. It has large feed, large crushing ratio and wide distribution of discharge size. It is especially suitable for crushing before vertical mill. [next]
PLF series vertical shaft counter-grinding crusher is a new type of high-efficiency and fine crushing equipment developed by the company's hammer, counter-attack and vertical shaft crusher. Due to the use of a special type of upwardly inclined circular counter-attack plate, and the use of a plate hammer made of symmetrical high-abrasion material and a crushing cavity constituting the secondary crushing, the crushing and counterattack of various crushers are The principles of centrifugal shock, shearing, grinding, etc. are organically combined to make full use of energy and crushing space. The machine has the characteristics of reasonable structure, convenient disassembly, high breaking rate, fine and uniform discharge, less vulnerable parts, convenient maintenance, low energy consumption and relatively large production capacity. PLF series vertical shaft counter crushing crusher is suitable for crushing materials with compressive strength ≤160MPa. It is especially suitable for brittle materials such as broken limestone in cement industry. Its surface moisture is ≤5%. People can also be used for crushing operations building materials, chemicals, mining and metallurgical industry in the former mill for crushing, grinding mill can significantly reduce the material size, play a role in order to break instead of grinding.
The technical parameters of each of the impact crushers listed above are listed in Tables 14 and 15, respectively.
Shangjian cooperated with Kobelco to produce vertical shaft impact crusher.
Vertical shaft impact crusher can be divided into RX series granulator and SX series sand making machine according to the application. It is the most advanced sand making equipment in the world. The granulator is used to round the corners of the aggregate to improve the shape of the stone particles. The sand making machine actively breaks up the basalt, pebbles, andesite , granite and other aggregates, and produces artificial sand by dry method. Here we mainly introduce the SX series vertical shaft impact crusher (sand making machine).
The SX series vertical shaft impact crusher consists of a mechanical body, a feed tube, a counterattack plate, a vertical shaft with a rotor, and a motor (Fig. 15).
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In the interior of the machine body by a mounting plate counter made of special high chromium cast iron, wear resistance, without bolt, easy to replace. On both sides of the material input port, an air circulation device is installed to circulate the wind generated by the rotation of the rotor in the circulation device to reduce the amount of dust discharged to the outside. The rotor is equipped with a wear-resistant ferrule to increase the life and reduce the number of worn parts of the mechanical body and reduce operating costs. The rotor that rotates at high speed achieves low noise and low vibration due to the balance adjustment.
The material to be crushed is input from the material input port at the top of the vertical shaft impact crusher and falls to the center of the rotor rotating at high speed. The dropped material is thrown at a high speed under the strong centrifugal force of the rotor, and the counterattack plate that hits the inside of the main body is broken. When the counter-attack plate is installed, the thrown material is struck at right angles to the counter-attack plate to achieve better crushing performance. The crushed incoming sand is discharged from the lower part of the sand making machine. The technical parameters are shown in Table 16.
9. Dahua Heavy Machinery The company produces a variety of impact crushers, which are described below.
(1) PF type impact crusher. The machine is suitable for industrial sectors such as cement, building materials, chemical industry, electric power, metallurgy, etc., and crushes medium-hardness materials such as limestone, granite, slag, sandstone and other materials. The technical parameters are shown in Table 17.
(2) IBP type strong counterattack coarse crusher. This machine is a series of high-efficiency and powerful counter-attack coarse crusher developed by Dahua Heavy Machinery Co., Ltd. based on the introduction of foreign advanced technology and combined with China's actual national conditions. It can be used for primary, secondary coarse and medium crushing operations. When processing materials with compressive strength less than 150MPa, the maximum feedable material is 1300mm, and the discharge material is 300mm. It can replace the coarse crushing equipment such as squat type and spiral back as the primary crushing equipment. When processing materials with compressive strength greater than 150 MPa, the maximum feed can reach 400 mm for secondary crushing operations. The machine can be widely used in the artificial sand and gravel system of hydropower, highway, urban construction and other industries, coarse and medium crushing of soft materials or medium crushing of hard materials.
Features: Reinforced large crushing cavity, large size, impact resistant, adjustable counter-toothed plate structure, able to withstand the impact of large materials, ultra-heavy rotor body with extremely high moment of inertia and counter-hammer impact crushing force. The rotor and the main shaft are connected by a taper sleeve and a key, and the insert type high-efficiency wear-resistant hammer is used, and the rotor body adopts a wedge-shaped block self-locking assembly form, and the installation and adjustment are convenient. The cavity is composed of 3 parts, with hydraulic or screw lifting mechanism, which is convenient for maintenance and adjustment. The shape of the product is cubic, which is less affected by the moisture content of the material, and the discharge is not easy to block. The main technical parameters are shown in Table 18. [next]
(3) PFQ type powerful counter crusher. PFQ type vortex powerful counter-crusher is a series of new high-efficiency impact crusher developed by Dahua Heavy Machine based on the introduction of advanced similar models from Germany and Austria. It is suitable for the maximum feed size not exceeding 500mm. , coarse, medium and fine crushing of various materials with compressive strength not exceeding 250 MPa. The utility model has the advantages of unique structure, simple operation mode, high efficiency and energy saving, the shape of the product is cube, the size of the discharge material is adjustable, the crushing can be selected, the crushing process is simplified, and the investment is reduced. Can be widely used in hydropower, highway artificial sand and gravel crushing and other industries. The technical parameters are shown in Table 19.
The machine is designed with unique vortex breaking chamber and three-stage crushing zone of P, S and T. The rotor body is connected by keyless taper sleeve, high-efficiency wear-resistant hammer, inserted and installed form, inclined bearing seat, unique tooth shape. Countering the lining, the frame opens in multiple directions, and the screw and hydraulic opening device make it easier to replace the wearing parts and overhaul.
(4) ISP type strong counterattack crusher. This machine is a new type of high-efficiency counter-attack crusher developed by Dahua Heavy Machinery Co., Ltd. based on the introduction of foreign advanced technology. It can be used in the second and third stage medium and fine crushing operation. When processing the material with compressive strength less than 150MPa, the maximum feeding is 400mm. When processing the material with compressive strength greater than 150MPa, the maximum feeding is 140mm. It can be widely used in artificial sand making and bean stone operations in hydropower, highway, urban construction and other industries.
1) Working principle. The motor is driven by the V-belt to drive the rotor to rotate counterclockwise at a high speed. The material enters the crusher cavity from the feed port, and is struck by the high-speed rotating plate hammer, and rebounds to the tooth-shaped counterattack plate on the first counter-attack plate at the top of the crushing cavity. After continuously colliding with the material that is impacted upward, it enters the second crushing chamber. Under the action of the wear-resistant tooth plate and the plate hammer, tremendous pressure, bending force and friction force are generated. The material is sufficiently finely ground in the crushing chamber, the shape of the particles is sufficiently shaped, almost no needle-like material exists, and finally the body is discharged.
2) Structural features. It has two-stage counter-crushing chamber and can be adjusted. The body is divided into two parts, which are easy to install and transport. The rotor adopts a taper sleeve and a key joint, and the high-efficiency wear-resistant hammer and the counter-attack plate can be inserted and installed, and a unique symmetric large opening door is arranged on both sides of the rack, and the hammer and the counterattack can be opened for replacement. It has the characteristics of convenient operation and maintenance, high efficiency and energy saving, and the shape of the product is cubic. It is used for sand making at a rate of more than 30%, the discharge size is adjustable, and it can be selectively broken. The technical parameters are shown in Table 20. [next]
5. Vertical counterattack grinder. The vertical counter-piercing crusher produced by Dahua Heavy Machinery adopts bearing transmission upper type, no sieve at the bottom, finished product lmm accounts for more than 65%, less power consumption, less wear, low feed opening, simple foundation, sealed and dustproof The effect is good. It is especially suitable for the fine crushing operation of cement raw materials and clinker. It can also be used for fine crushing and rough grinding of medium hardness and other materials such as coal, coke and limestone. The technical parameters are shown in Table 21.
(6) PL type vertical impact crusher. This machine is a new material/material self-impacting crusher jointly developed by Luoyang Mining Machinery Research Institute and Dahua Heavy Machinery. It passed the industrial test of Shougang and passed the new product appraisal in Beijing in 1991, filling a domestic crusher industry. Blank, reached the advanced level of the world's similar products. The machine has two types: "stone-rock (PL)" and "stone-strength (PLST)". The “stone-rock†type is used for hard material processing, and the sand production rate is about 30%. The “stone-iron†type is used for medium-hard material processing, and the sand production rate is 40%~60%.
1) Features. The utility model has the advantages of simple structure, low cost, stable operation, high efficiency and energy saving, and the material self-lining in the impeller and the vortex crushing chamber greatly reduces the wear parts cost and the maintenance workload, and effectively solves the problem of iron pollution in the pulverization process of raw materials such as glass and The problem of "calendar steel" in the process of steel slag crushing, the ingenious internal airflow self-circulation eliminates the dispersion of dust. The technical parameters are shown in Table 22. 2) Use. This product is widely used in metal and non-metal ore, cement, refractory materials, abrasives, glass raw materials, building aggregates, artificial sand and various metallurgical slag fine and coarse grinding operations, especially for medium hardness, special hard and abrasive materials such as silicon carbide, silicon carbide, sintered bauxite, sand, magnesium and the like, more advantages than other types of crushers. Used in conjunction with a hydraulically protected jaw crusher to handle a variety of metallurgical slags.
(7) PFL vertical composite crusher. The PFL vertical composite crusher produced by Dahua Heavy Machinery Co., Ltd. is a new type of fine crushing and coarse grinding equipment which is optimized by designing the main technical parameters of the same type of crusher technology at home and abroad. It is mainly used for crushing cement in small and medium-sized cement plants. Raw materials and clinker provide a new fine crushing equipment for technical transformation of cement plants or new cement production lines. It is also suitable for the crushing of medium-hard iron ore, sandstone, gypsum , blast furnace slag, coal research stone, lump coal and other medium hard ore. It has the characteristics of large crushing ratio, low energy consumption, stable operation, simple structure and convenient operation and maintenance. The technical parameters are shown in Table 23. [next]
10. The technical parameters of PFC type (coarse crushed) and PFX type (fine crushed) impact crusher produced by Nanfang South Mine are shown in Table 24, 25. The technical parameters of the PLS vertical shaft crusher produced by Nanfang Mine are listed in Table 26.
11. Sandvik The company's Sandvik impact crusher is today's most advanced counter crusher. Its high crush ratio and high quality cubic products are key advantages of its P and S series. At the same time, the crusher has the advantages of wide applicability, low maintenance cost, safe operation, simple operation and maintenance, and the like. [next]
The crusher adopts a welded casing, and the upper casing is provided with two heavy counterattack plates, each of which is adjustable and suspended on the hinge shaft. The counterattack plate is a gravity suspension, and the opening is set by the adjustment lever. This design feature avoids the use of spring mechanisms with more faults. The third counterattack is used as an option for the secondary counter crusher and some large primary counter crushers and is positioned by mechanical means. The structure of the impact crusher is shown in Fig. 16.
Both the primary impact crusher and the secondary impact crusher use the same rotor. The rotor has three specifications: diameters of 1150mm, 1300mm and 1710mm, which can be adapted to all sizes of crushers. All counter hammers have the same cross-sectional shape and size and are available in two different lengths to meet the requirements of all different rotor types. All rotors are welded and the back plate is strong and heavy to ensure that the counter hammer is securely mounted and positioned to ensure maximum rotor moment of inertia.
The counter hammer is locked by a wedge block. The self-locking device consists of a boring block, a bolt and a spring washer (the first locking point). It is simple and reliable, ensuring that the counter hammer is axially fixed in the radial direction.
The unique "banana" shaped hammerhead design keeps the shape of the fracture surface constant throughout the life cycle, ensuring product gradation stability. At the same time, the entire hammer head is firm and firm to prevent damage to the rotor. The P and S series differ from other products in their unique large diameter rotor. The developed rotor provides extremely high moment of inertia and counter hammer impact.
(1) Optimize the modular design. Three diameter rotors, matching crusher width, for all 16 types of primary and secondary crushers; single counter hammer section, only two lengths, matching all types of rotors; single housing The liner covers 80% of all primary and secondary impact crushers; a single gauge counter-locker is used for all P and S series crushers.
(2) Easy maintenance and safe operation. The maintenance space of the crushing chamber is maximized, thanks to the low position of the hinge point of the upper casing of the crusher, so that there is a large movable space between the fixed shell and the movable shell. There are random special tools for detaching and installing and locking the counter hammer, which avoids the safety problems that may be caused by manual work.
In order to prevent accidental tipping after the upper casing of the crusher is opened, an anti-tip self-locking ram is provided, and a locking mortise lock is provided to prevent the rotor from rotating during maintenance. These devices are permanently placed on the crusher casing for immediate use. The electromechanical interlocking safety lock system ensures that the upper housing is opened and the rotor is stopped and the circuit is completely disconnected when the inspection door is opened. The weight of the counterattack or the casing liner is designed to be 22-35kg, which facilitates the replacement of the liner.
The technical parameters of the P series and S series impact crushers are listed in Tables 27 and 28. The external dimensions are shown in Figures 17 and 18.
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MERLIN-VSI RP series vertical shaft impact crusher. The MERLIN-VSI series vertical shaft impact crusher produced by Sandvik is a new type of crusher developed on the basis of more than 20 years of design and production and application of the gravel vertical shaft crusher. It is a suitable equipment for superfine crushing and artificial sand making. Compared with the traditional stone-rock vertical shaft crusher, it has the following characteristics:
1) Improve the reliability of operation. Use the drilled material guide to make the material more stable. Improve the drive system, greatly reduce the vibration level of the operation and improve the stability of the operation.
2) Maximum crushing efficiency. The bypass feed Bi-FLOW system allows the bypass stream to be evenly distributed along the crushing chamber and the flow is more stable. Improve the theoretical throughput of the rotor.
3) Reduce tons of consumption. Improve the design of the wear parts, reduce the weight of the wear parts, make the rotor dynamic balance easier, and run more smoothly. Reduce the number of wear parts.
4) Simplified maintenance. The size of the inspection is increased to facilitate replacement of the rotor wear parts. A large number of card fasteners are used to facilitate the disassembly and assembly of wear parts. Hydraulic belt drive tension adjustment. Semi-automatic grease lubrication system.
The technical parameters of the vertical shaft impact crusher are shown in Table 29, and the external shape is shown in Fig. 19. The external dimensions of the RP109 type are shown in Fig. 20.