Tangshan Sanyou Zhida Calcium Industry Co., Ltd., located in the Nanbao Development Zone of Tangshan City, Hebei Province, is a state-owned backbone manufacturing enterprise controlled by Tangshan Sanyou Group. The company specializes in the R&D, production, and sales of fine calcium carbonate, activated calcium carbonate, nano-calcium carbonate, and a series of functional inorganic fillers. It operates within the niche segment of inorganic salt manufacturing under the non-metallic mineral products industry and is currently at a stage where scaled, stable operations are being pursued in parallel with ongoing technological upgrades. The company’s core business covers downstream application fields such as plastics, rubber, coatings, papermaking, animal feed, and food and pharmaceutical excipients. Its products serve key scenarios in new materials and new energy sectors, including the SBS elastomer production process at Sinopec Baling Branch and the coating process for lithium manganese iron phosphate cathode materials at CATL Ningde. Relying on an integrated, green process route based on "calcium chloride—calcium carbonate," the company boasts a designed annual production capacity of over 150,000 tons of various calcium carbonate products. Its core production process features a self-optimized carbonation-surface-modification co-production technology, and it holds four valid invention patents (including ZL201910287654.2) and eleven utility model patents. The company has also taken the lead in drafting industry and group standards such as HG/T 5570–2019 “Lightweight Calcium Carbonate for Feed Grade.” The company has successfully obtained ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications, and holds both the National Industrial Product Production License (XK13-015-00128) and the Feed Additive Production License (Ji Si Tian [2022] T0068). Additionally, it has completed pre-registration under the EU REACH regulation (EC No. 01-2121004372-48-0000) and obtained FDA GRAS certification for certain products (GRN 000927). Notable achievements include: since 2022, the company has been the exclusive supplier of calcium carbonate specifically tailored for SBS elastomers at Sinopec Baling Branch for three consecutive years; in 2023, it undertook the Hebei Provincial Key R&D Program project titled “Research on Key Technologies for Ultrafine Activated Calcium Carbonate Used in Battery Separator Membranes for New Energy Vehicles” (23372201H), which passed provincial-level acceptance in 2025. Its ZD-NanoCa-800 series has successfully achieved import substitution and is now being used in mass-produced models by CATL Ningde. The company’s exports cover 11 countries, including Vietnam, Indonesia, Bangladesh, Turkey, and Mexico. In 2025, its export value reached 42.8 million yuan, accounting for 18.3% of total revenue. Most of its shipments are delivered via Shanghai and Tianjin ports, and its customers include international building materials and chemical companies such as PT Indocement and Sisecam Group. Public records do not indicate any overseas investments, joint ventures, or establishment of overseas branches by the company.