Germany HAZAMAC company's counter-crushing machine is broken into rough, broken, breaking three small purposes, is divided into hard materials for hard materials and the two different occasions, for the combination of several models 10 . To meet the needs of all aspects of the market. By contrast, China's counterattack Breakers Although the Hard Rock has broken breakthrough, but the lack of specification less. From the market demands, should strengthen the development of the following types of products.

A: rough broken equipment:

When the cement industry used as a raw material tube mill grinding, single-paragraphhammer crusher is a better choice, and in 2000 t / d above the cement production line, more and more use of vertical mill to replace the tube mill A better choice is supporting programmes should be large crude break counterattack crusher, as legislation can be easily adjusted to the needs of grinding material particle size, vertical mill to the establishment of bed pressure to improve processing capability, therefore, bear rough break counterattack Breakers, there will be quite a big market, listed in Table 1, its main properties:

Specifications mm processing capabilities t / h maximum feed-out side mm size m
Φ1600 × 1500 300 1000 100300 40
Φ1600 × 2250 500 1000 100500 60
Φ1800 × 2250 700 1200 100600 70


B: a chronology of equipment:

When the highway anti-skid surface of the graded asphalt concrete aggregate demand less, and the basalt, andesite, and other hard material handling capacity requirements of 100 t / h above, the current counter-hard rock crusher in a material size and ability to deal with the two aspects of some difficulty. Shanghai construction firms in 1999 the United States to introduce the latest technology (Figure 6) as a new model in the cavity shape and design of the rotor business-as-usual model of the structure of a significant change. Properly address these two issues. PF1315 of its new products, since the second half of 2000, market supply, which has been in short supply. This mechanical products by the former State Administration of identification, reached international advanced level to meet the Hard Rock, a chronology, the larger of the two break capacity requirements.

C: Sand system equipment:

When the Yangtze River, such as the prohibition of natural sand mining, sand become hot commodities market, the reversible counter crusher in Europe as a system for the use of a wide range of equipment Sand (7). Using two-way envelope of the counter plate with linear velocity of 40 m / s and above the high-speed rotor plate hammer, a good control nesting size. In-house system, the system of its nesting sand up to more than 50 per cent, higher than the stone at the stone shaft impact crusher machine-sand ratio. This product will sand in the market mechanism with a demonstration of the above three aspects will be market-driven counter-breakers the direction of development.


4. Crusher has been the development of a new type of abrasion-resistant material for the pillars of the application.
1882 first proposed the high manganese steel, tough as water treatment, high-impact and high compressive stress load because of deformation twinning with organizations such as a change in the surface work hardening, microhardness up HV750, and the Department still Core maintain a good impact toughness. Jaw use in the tooth plate, Cone Park dynamic cone, the cone, the hammer hammer, as the first generation of abrasion-resistant material. It cant't low impact load or low stress use.

1930 Nickel about the hard cast iron, hardness up HRC55-60, as a second-generation wearable materials, too brittle, it can only produce small parts, such as sand and gravel washing machine helical blade plate, and your nickel in China , it rarely applied. Nickel cast iron than the hard years later the high-Ming was known as the third generation of cast iron wear-resistant materials, in its robust martensite matrix, the bulk of hard carbide and a certain amount diffuse small secondary carbonation - when the chromium content of over 10%, was the carbide (Fe, Cr) 7C3 type. Microhardness up its HV1300-1800. Currently mainly used in counter-plate and shaft-hammer blow plate. High-chrome cast iron on chromium content is divided into Cr15, Cr20, Cr26 are low chromium content of the low prices in the high toughness relatively good counter-plate hammer, the majority of domestic manufacturers use Cr20 manufacturing, and more widespread use of foreign Cr26.

High-chrome cast iron is the inadequacy of the hard and brittle and high prices. Currently, the new wear-resistant materials in the research under way. It is understood: high toughness martensitic steel casting, multiple air-cooled low-alloy martensite - bainite cast steel, high strength and toughness austenitic - bainitic steel, is expected to become the next generation of abrasion-resistant material, these new Once mature and materials application will promote the Breakers in particular on the strong dependence of wear-resistant materials counterattack Breakers development.

5, as the reform and opening up policy brought about by economic development, and market demand driven counterattack Breakers development. However, such development is modelled and the introduction of foreign technologies in a statement. Although also meet market demand, but a lack of creative autonomy, and the market economy "instant success," the negative effects of fragmentation on the theoretical study of the crusher and the experiment is the lack of both in recent years, not theoretical and experimental guidance product development, can only continue to imitate foreign design, I do not know why they are so often know these. If the domestic universities, research institutes and enterprises, can achieve good "of production," three-in-one, in the theoretical research and experimental work more to make some effort, our country will certainly be able to counterattack breakers to a new level.