Grate plate is mainly applied in hammer crusher, grinding machine, which are the type of the impact crusher. Therefore, the grate plate is easy to broken in the process of impacting with the materials. DSMAC manufactured the grate plate with the high manganese steel and advanced techniques to enhance its toughness and wear resistance.
DSMAC owns a research development team, including 3national experts and a large number of senior engineers and masters. In addition, the company also established strategic partnerships with famous universities, such as Xi'an Jiaotong university, Materials engineering college of Zhengzhou university, Harbin materials research institute, and many of universities and R&D institution, will keep long-term and close cooperation to promote wear-resisting casting industry development in China.
The China impact crusher is new type highly-efficient crushing equipment with the features of small size, simple structure, high crushing ratio (as much as 40), low energy consumption, strong production ability, even particle size, etc. As a very promising machine, it has been applied in some ore dressing factories owing to the appearance of highly-abrasive materials.
This series of impact crushers is the new generation type which has combined the advanced techniques at home and abroad with the actual mining conditions. They adopt the latest manufacturing technology and unique structure design and produce products with cubical shape without tension and crack.
There are two parallel rotors in the Mobile Impact Crusher with some altitude differences. The position of the first rotor is relatively high, with an angle of 12from the node of the first and the second rotor. The first rotor is a heavy type used for coarse crushing; the second rotor rotates fast, which can meet the needs of the final product. The rotors are both fixed with bolts. The 12 blow bars distributed to 6 rows are made of high manganese steel. The rotors are fixed on the main shaft and separately connected with the coupling by two engines.
The materials fall to the high-speed rotating turn plate. With the effect of strong centrifugal force, these materials in the plate hammer function area will impact with hammers on the rotor. Then the materials will be thrown into the counter attack device for second crushing. After that, they are rebounded to the former area from the impact lining board for further crushing. This process will be repeated until desired purpose is achieved. The finished products will be discharged from the discharge port. To control the granularity and the shape of the materials, you can adjust the space between the impact rack and the rotor.
Model Specification mm Feed opening mm TheMaximum FeedingSize mm Capacity t/h Power kw Overall dimension LWH mm Total weight t PF-1007 1000700 400730 300 30-70 4P 37-45 233016602300 12 PF-1010 10001050 4001080 350 50-90 4P 45-55 237017002390 15 PF-1210 12501050 4001080 350 70-130 6P 110 268021602800 17.7 PF-1214 12501400 4001430 350 80-180 6P 132 265024602800 22.4 PF-1315 13201500 8601520 500 100-280 6P 200 318027203120 27 PF-1320 13002000 9932000 500 140-380 6P 250 322031003120 34 PF-1520 15002000 8302040 700 200-550 4P 315-400 395935643330 50.6 PF-1820 18002000 12602040 800 400-800 4P 630-710 440038664009 83.21
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The FLSmidth Strike-Bar Crusher is a high-speed impact crusher designed specifically for the cement production process. Based on our proven technology, it is built to reduce the effect of wear in a harsh operating environment. With it, we aim to help your production operations achieve their true potential.
The Strike-Bar Crusher is just one impact crushing solution within our complete family of crushing equipment. It is the perfect choice for crushing large rocks in a single rotor operation. It combines the latest crushing technologies with our extensive experience in crushing and cement production operations.
Our strike-bar crusher is available in a wide range of sizes. With a throughput capacity of up to 2,600 tonnes per hour, the crusher handles lump sizes larger than 2 metres and 4 tonnes (1:40 size reduction).
Raw material enters the crusher through the integrated apron feeder. In the first part of the process, the material is crushed by impacting. Then, it is sheared by compression between the strike bars, breaker plate and grinding plate. The durable springs and adjustment systems eliminate many common stoppages and minimise equipment damage.
In the rock crushing process, reliability and durability of equipment are key operational factors. Impact crushing equipment bears the brunt of constant impact and wear as it is constantly subjected to strong forces from large, heavy quarry materials. There are clear economic advantages of increasing wear parts lifetime and making maintenance easier.
In many impact crushers, wear items, such as strike bars, liners and breaker plates, usually need to be replaced frequently. It can be difficult to slow the wear rate of these consumables, which pushes up costs and the overall maintenance burden.
We see this as a significant source for savings. This is why we have designed a flexible, well-designed strike-bar crushing system using highly durable material. This maximises utilisation of wear parts before they need replacing.
Ensuring correct alignment of the gap between the rotors and breaker plates is crucial to achieving the desired size of crushed material. Standard impact crushers can take up to several hours to align, but our entire system can be easily aligned in just a few minutes thanks to the adjustable hydraulic cylinders, significantly reducing stoppage time.
The combination of our heavy-duty, reliable technology and unique design for easy maintenance means that the FLSmidth Strike-Bar Crusher achieves a low total cost of ownership over a long lifetime. the as well as simplifying maintenance throughout the crushers lifetime. And, we have enabled quick and easy replacement of wear parts to cut potential downtime.
We have lengthened the wear life of several critical aspects of the impact crusher. The interchangeable and segmented strike bars are useful for up to 50 percent of their original weight. And, the breaker plate and grinding plate are made of highly durable, robust material made to withstand the constant impact and movement.
Several important features make our Strike-Bar Crusher easy to maintain, which reduces lifetime costs. The wedge fastening system and easy-to-open main housing allow you to quickly adjust and rotate the strike bars, for example. All exposed surfaces are lined with bolted-on wear resistance plates for extra durability. Access hatches ensure easy inspection and access to interior wear parts.
Key to our Strike-Bar Crushers performance is the robust rotor and drive system. As the heart of the crushing system, the strike bars are mounted on the rotor system. It is designed with three principles in mind:
The drive station is based on a proven gear solution designed for a small footprint and easy maintenance. It includes safe-set coupling and a multi-joint shaft for easy alignment. The rotor design delivers maximum inertia for the crushing process and can be easily replaced with minimum downtime.
Our Strike-Bar Crusher is the first crusher that greatly minimises overload and eliminates stoppages. We have achieved this with a unique combination of hydraulic positioning adjustment and spring dampening system, an innovative development that reduces maintenance time. The system consists of several hydraulic cylinders, each fitted with a hollow piston containing a spring system. The springs are carefully pre-tensioned to withstand impact during crushing operations.
All breaker and grinding plates can be adjusted to compensate for wear and to fine-tune the output product by means of hydraulic cylinders. Together with the durable spring system, which helps prevent overload, this eliminates common stoppages andminimises equipment damage.
The breaker and grinding plates are easy to pull out for inspection and maintenance. As a safety measure, a slide rail system supports the plates inside the crusher even when the breaker and grinding plates are disengaged.
FLSmidth provides sustainable productivity to the global mining and cement industries. We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FLSmidth generated revenue of DKK 16.4 billion. MissionZero is our sustainability ambition towards zero emissions in mining and cement by 2030.
Impact crusher and hammer crusher both use impact principle to crush materials, and the finished material has excellent particle shape. From the appearance, impact crusher and hammer crusher are similar, but they are different in many aspects, so which is better?
Hammer crusher is divided into single rotor and double rotor. The main body is composed of box, rotor, hammer head, impact lining plate, sieve plate, etc. it can directly crush the material with the maximum particle size of 600-1800 mm to 25mm or below.
In contrast, the crushing chamber of hammer crusher is smaller, the impact effect cannot be fully exerted, and the impact crusher is of multi chamber crushing structure, so the crushing is more sufficient.
The plate hammer and rotor of the impact crusher are rigidly connected. The inertia of the whole rotor is used to impact the material (free crushing, impact crushing, milling crushing), so that materials can not only be crushed but also obtain a larger speed and kinetic energy. The plate hammer is used to smash the input material from the bottom to up and throw it onto the upper impact plate.
The hammer head of the hammer crusher is used to crush the material (free crushing, impact crushing), and the speed and kinetic energy obtained by the material are limited. The hammer head striking materials along the material falling direction, with small crushing effect.
The wear of impact crusher plate hammer often occurs on the side that facing the materials, and its metal utilization rate can be as high as 45% 48%. When crushing limestone, the plate hammer of impact crusher is not seriously worn, but when crushing granite (with high hardness, it can be broken by cone crusher), the plate hammer needs to be replaced constantly.
The hammer head of hammer crusher is in a suspended state, and the wear occurs at the top, front, back and side. Compared with plate hammer, the hammer head is more seriously worn, the metal utilization rate of hammer head is about 35%, and the rotor may also be worn.
The feeding chute and the counterattack plate of the impact crusher can be equipped with heating device to prevent the material from binding, so the material with large water content can be crushed and the blocking is not easy to occur.
The impact crusher is not easy to block the material. First, it can be equipped with heating device to prevent the material from blocking due to sticking. Second, there is no grate bar at the bottom. The product size is determined by the gap between the impact plate and the plate hammer. Therefore, when handling the material with too much water content, it can avoid blocking the grate bar when crushing the wet material.
Both of them are suitable for crushing medium and hard materials, but the impact crusher is mostly used as the secondary crushing equipment. While the hammer crusher is mostly used in the cement production line, as the limestone raw material crushing equipment, or as the primary crushing equipment in the sand aggregate plant.
The compressive strength of materials suitable for hammer crusher is within 200MPa, such as coal gangue and limestone, while the compressive strength of materials suitable for impact crusher is within 350Mpa, such as gypsum, coal gangue, limestone, river pebble, sandstone, quartzite, etc. the application scope of impact crusher is wider.
In the market, the frame part of the advanced impact crusher is a three-part structure, which only needs to open the shell at the back of the crusher to replace the plate hammer, impact plate, lining plate and other maintenance operations. Moreover, there are few varieties of vulnerable parts, which is convenient for the purchase and management of spare parts.