Tin ore, tungsten ore and tantalum ore are important metals in modern industry. They are widely used in the fields of chemical industry, national defence, high and new technology and so on. For mining purposes, these ores which with higher hardness require specialized crushing equipment.

Vertical shaft counterattack crusher, also called compound crusher, is a new type of mining equipment developed on the basis of vertical hammer crusher and counterattack crusher. Mainly used in building materials, metallurgy, mining, coal, chemical and power industries, such as crushing cement clinker, gypsum, limestone, sandstone, blast furnace slag, iron ore, gold ore, molybdenum ore, aluminum ore, stone coal, lump coal, asbestos ore, phosphate rock and other medium hard materials, but the requirement for material moisture content is very high, not suitable for crushing wet materials.

The crusher machine using the concept of grading crushing. The first level of crushing reflects the characteristics of counterattack crusher, through high-speed impact and crush, the large pieces of material becomes small piece of material. The second level of crushing reflects the characteristics of the extruder. Through the impact, squeezed and broken, the crushed small pieces of material becomes powder and small particles.

The crusher is combined with hammer and roll, crushing and milling. The output particle size can be adjusted according to need. The material size is fine, uniform and stable. Using a new wear-resistant composite hammer, and the utilization ratio of the hammerhead is high. The clearance adjustment function prolongs the life of the wearing parts, there is no grate bars at crusher discharge port, so it is not easy to plug. The utility model has the advantages of stable operation, reliability and strong adaptability.