Tangshan Ming Tai Grinding Material Co., Ltd. is a new and developing grinding material enterprise in the tide of economic reform. It has five manufacturing shops with annual production capacity of more than 50 000 tons, one research group and one sales department. It's an appointed and professional manufacturer in the similar enterprises in Hebei Province. Our factory owns the advanced equipments, abundant technical force, completed measuring and test instruments, and has won the trust of extensive customers at home and abroad for several years by reliable and high quality and warm and thoughtful services. Our factory has the fixed assets of 60 million RMB and more than 200 workers, including about 50 technicians. We have formed three series: The Complex Alloy Cast Grinding Ball, the Low-chromium Alloy Cast Grinding Ball, the High-chromium Alloy Cast Grinding Ball. The Complex Alloy Cast Grinding Ball is the initiation at home and its each economic technical index has reached the world level. It has won three national patent, numbers: Invention: 89102932. X craft 89102884.6, model 89206600.8. It won the second prize at Tangshan Science & Technology Progress Meeting in 1987, the excellent products prize in the National Grinding Ball Selection Material and Comprehensive Test in 1988 and the invention wisdom prize in the 3rd and 4th Session of Hebei Invention Exposition in 1990 and 1991. It was regarded as the medium-sized and small cement enterprise energy-saving reform products at the Meeting of the National Building Materials Bureau Nanjing Medium-sized and Small Cement Enterprise Choosing the Excellence in May, 1990. It won the silver medal at the 5th Session of National Invention Exposition in October 1990 and was awarded the reputation cup of " the high quality and trustable products for customers" by the National Cement Information General Bureau in 1990. In 1994 it won the title of " 94' National Cement Industry, Ten Best Enterprise". After sample inspection, all the technical index inspected have reached the standard, the content include geometric dimensioning, appearance quality, chemical elements, surface hardness, inherent quality. Our product was judged as the quality cast grinding ball by the National Building Materials Quality Inspection Center according to the JC/T533-94"Building Material Industrialized Cast Ball Standard" on March 24, 1997. Our factory has been classified as the appointed High-chromium Cast Grinding ball manufacturer by the National Building Materials Bureau on December 28, 1998. Nowadays, our products market has expanded to every province, city, and autonomous region except Tibet area in mainland, some of the products have been largely distributed to Russia, Mongolia, India, Malaysia, Japan and other countries and regions.