Dongguan yongsheng, casting material co., LTD. Was established in July 2000, more than 40 years experience in the industry of manufacturing refractory Huang Yousong Sir, under the leading of improved design of the second generation dedicated solely for mullite powder sand production equipment and process. The second generation of modified to output by a factor of 3, a more accurate size, we will have effective dust quantity and iron content to a minimum. Continuation of the successful experience of the second generation of equipment improvement at the moment we have entered the third generation, in order to all the staff and to environmental protection, energy conservation and carbon reduction as a psychic. We believe that the enterprises should keep pace with The Times, strives for perfection! To improve quality, sustainable operation.