... used in building materials, metallurgy, chemical industry, cement plant for drying of limestone slag, coal powder, slag, clay stone. This ... specialized in manufaturing Rotary Dryer and other big and medium drying equipment, sand making equipment. Hongji Group can also produce ... free to contact us. Tel: 0371-67668558 Fax:0371-67662768 High Quality/ISO9001:2008 Rotary Drying Oven for Drying Sand/Stone