Founded in November 2003, Shizuishan Pengsheng Chemical Co., Ltd. is located in the national Shizuishan economic and Technological Development Zone of Ningxia. It covers an area of nearly 140000 square meters, has a registered capital of 100 million yuan, a total asset of more than 300 million yuan, and more than 500 employees. It has four branches (raw material branch), carbide branch, lime nitrogen branch and cyanamide branch). In 2013, it was selected as the third batch of pilot enterprises of circular economy in the autonomous region. In 2017, the company realized sales revenue of 431 million yuan, profits of 14870000 yuan and taxes of 8.2 million yuan. In 2018, the company achieved sales revenue of 500 million yuan, profits and taxes of 45 million yuan, and exports of 14.32 million US dollars. Its leading products were exported to the United States, India, Pakistan, Europe and the United States and other countries and regions. Since its establishment for 17 years, the company has achieved stable production and operation. At present, it has developed into one of the key medium-sized private enterprises above the scale of Shizuishan city. It has formed the industrial chain of lime calcium carbide lime nitrogen dicyandiamide chemical recycling economy. Its products are exported to home and abroad, and it is a foreign exchange earning enterprise in Shizuishan city. Since 2011, the company has invested 329 million yuan to eliminate and dismantle the original 3 × 12500kVA open type mineral thermal calcium carbide furnace in response to the national policy of "putting more emphasis on the development of the large scale than on the small scale" and structural adjustment and industrial upgrading, actively develop circular economy, and change the situation of single products and primary processing in the early stage of enterprise development, Newly built 2 × 31500kVA large-scale closed calcium carbide furnace, 150000 T / a lime nitrogen, 20000 t / a dicyandiamide, 200000 t / a white ash, 120000 T / a dry orchid carbon and other series of production units have been formed, with an annual production capacity of 200000 t of white ash, 126000 t of calcium carbide, 150000 t of lime nitrogen and 20000 t of dicyandiamide, forming the circulation of "lime calcium lime nitrogen dicyandiamide and downstream products" within the enterprise The industrial chain around the economy has contributed to the development and stability of local economy. In 2018, in accordance with the requirements of accelerating the upgrading and transformation of traditional industries in the autonomous region and Shizuishan City, the company continued to implement the technological transformation and upgrading of processes and equipment, with a planned investment of 91 million yuan, and used 100000 tons of lime nitrogen production line to build a 30000 tons of lime nitrogen granular fertilizer and 20000 tons of medical grade dicyandiamide project.