Hunan Hengguang Chemical Co., Ltd. is a modern high-tech enterprise which takes basic vulcanizers as the platform and takes fine chemical and new materials as the leading research, development, manufacture and service of new chemical materials. The company is a wholly-owned subsidiary company of Hunan Hengguang Science and Technology Co., Ltd. located in Hengyang, Hunan, an important industrial city in the central and southern region. The factory is located in Hengyang Pinewood Economic Development Zone, a key national salt chemical and fine chemical industry base, with perfect supporting facilities and convenient transportation. Founded in 2008, the company is a key investment attraction project signed on "Shenqian Week" in Hengyang City. It has been listed in Hengyang Key Engineering Company with a registered capital of 150 million yuan and more than 300 employees. The company has built a single set of 300,000 tons pyrite acid production and fine chemical new materials and other advanced equipment. With annual output of 300,000 tons of sulphuric acid, 150,000 tons of iron concentrate powder, 20,000 tons of sulfamic acid, 20,000 tons of calcium-aluminium hydrotalcite production capacity, production process and technology in the leading domestic level. The main products are sulphuric acid series, iron concentrate powder, aminosulfonic acid, calcium-aluminium hydrotalcite, sodium pyrosulfite, sodium sulfite and steam. The company has always adhered to the business philosophy of "quality first, customer first". The products are sold at home and abroad and have won unanimous praise from customers. Based on industrial parks, using industrial clusters, the company adheres to the business model of "developing circular economy, realizing comprehensive utilization, relying on technological innovation and accelerating industrial upgrading", and constructs the industrial chain of circular economy. Over the years, the company has adhered to the circular economy industry model and the development concept of environmental protection and energy saving, taking 300,000 tons pyrite sulfuric acid as the platform, vulcanizing workers as the leading factor, actively developed new fine chemical materials, and now has extended the industrial chain to high-end, fine, new materials, environmental protection services and other directions, so as to realize the transformation of products from primary resource-based to high-end material-based. The company is a high-tech enterprise in Hunan Province, and has passed the certification of ISO 9001 quality management system. It has obtained the qualification of permission for hazardous waste management and the second-level qualification of national safety production standardization, etc. It has been listed as a pilot enterprise for information management of hazardous chemicals transportation.