• • The standard (GB/T 45015-2024) is the first national standard for titanium gypsum resource utilization, filling the technical specification gap and providing clear pathways for building material use and ecological restoration, which is critical for increasing the current utilization rate of only ~10%.
• • Titanium gypsum production in China reached 3,120×10^4 t in 2023, with over 60% concentrated in Shandong, Sichuan, and Guangdong provinces; the standard's implementation is essential to manage this large waste stream.
• • The standard specifies limits for soluble impurities and pollution control indicators, addressing the high free water content (>25%) and fine particle size (<50 μm) that previously hindered utilization and caused environmental risks.
• • By standardizing utilization methods and environmental risk controls, the standard supports the industry's shift toward co-production and circular economy models, as exemplified by projects like the 60×10^4 t/a cement retarder facility using titanium gypsum.