Henan Sannai Industrial Co., Ltd. is located in Sanmenxia City. It was founded in 1985 and developed from Sanmenxia Electro-melting Corundum Co., Ltd. It is a supporting enterprise in Shanghai Baosteel invested by the former Ministry of Metallurgy and a professional enterprise in the Ministry of Metallurgy for the production of dense corundum. , is the developer of the Ministry of Metallurgy Corundum Product Standard.

After more than 30 years of precipitation and development, the company has successively become a standard enterprise in the refractory materials industry of the Ministry of Industry and Information Technology; the president unit of Henan Refractory Materials Industry Association, the president unit of Henan Corundum Industry Green Development Association, the national high-tech enterprise, and the Henan enterprise Standardized first-level enterprises. In 2020, it was designated as a B-level environmental protection leading enterprise by the Henan Provincial Environmental Protection Department; in the same year, in order to encourage the development of the refractory materials industry, the municipal government allocated more than 20 million tons of high-quality bauxite resources to the company.