Zhengyuan Powder Engineering Equipment Co.,Ltd, the largest manufacturer of grinding and classifying equipments in China, is composed of two companies, one is in Shanghai and the other is in Weifang, both of them hold trial center and labouratory of advanced international standards, we can offer one-to-one free industrial test for you at any time. The products such as Ball Mill & Classifier, Classifier, Impact Mill and Jet Mill featured by low consumption, high capacity and high effectiveness of classification have been used widely for fine grinding of numerous non-metallic minerals and the others and exported to Pakistan, America, Britain, Germany, France, Spain, Russia, South Korea and so on.