Mining and metallurgy research institute of Beijing developed type PWZS256 sieving crusher, the crusher will be crushing and screening to a body, the smallest size up to 3 mm.Especially in recent years, the breaker is a new product developed rapidly in the world.Britain MMD mining machinery group co., LTD. Has developed, 500, 605, 750,, 1000, 1300 and 1500, a total of six series of graded teeth roll crusher (http://www.crushing-mill.com/roll-crusher/), each series have short box type, standard and long box type 3 different working length, to meet different processing requirements.In 1990, by the FFE mining infrastructure equipment companies in the United States and Australia in leah ABOH engineering company joint venture development ABOH series classification crusher crushing process can be divided into three sections, and visual into different partical limit and choose a different tooth roller spacing. When the filling cap is l000mm, toothed roller spacing is about 1000 mm, the coarse crushing l000mm into broken to 350 mm, 2 from 350 mm to 100 mm, broken three broken to 50 by 100 mm, 45, the granularity of the 35 mm or user requirements. Similar and Australia love bond type mechanical engineering company's teeth roll crusher, American MCLANHAN DDC - Sizer type crusher, etc.
To sum up, the technology and equipment and theory of teeth roll crusher's research mainly focuses on: (1) the research of energy saving and efficient in the broken theory, and tries to find out new theories to breakthrough has been known as the three big crushing theory;(2) research new high energy or