In day yu mining co., LTD has more than 20 years of fused magnesia production history, provides the company electrothermal material production quality stability and raw material supply, formed the advantage of industry chain, in line with the "user first, quality first" corporate philosophy, to provide users with high quality of electrical grade magnesium oxide product, the company products are popular in domestic market, and part of the marketing in Europe and Asia market. Welcome to the teleph