Contact Details. Inquiry Basket Company Favorites Business Card. Address: 15th Fl, Bldg No. 13, National University Science Park (East), No. 279, West 3# Ring Rd, Zhengzhou, Henan, China 450001. Book a Factory Tour 360° Virtual Tour.Henan Dajia Mining Machinery Co., Ltd. - Mining …waste sorting & packing Henan Dajia Mining Machinery Co., Ltd. Specialized in design, produce, and export mining machinery and waste handling plant in China. Our factory, which covers 66,000 square meters, specializes in the manufacture of large and medium sized mineral processing equipment, metallurgy equipment, and construction machinery.