On September 15, according to the information of the State Intellectual Property Office, Huaxin Building Materials Group Co., Ltd. applied for a patent entitled "Modified phosphogypsum activated red mud-based foam concrete and its preparation method".
Application Publication No. CN122725772A, Application No. CN 202610955563.9, Application Publication Date Sep. 11, 2026, Application Date Jun. 30, 2026, Inventors Li Yeqing, Qin Jiefa, Chen Chao, Yu Songbai, Luo Siqiao, Ren Zheng, Zhang Bowen, Ye Mingyuan, Deng Xikun, patent agency Hubei Wuhan Yongjia Patent Agency Co., Ltd., patent agent Xia Feng, classification number C04B28/14, C04B38/10, C04B111/40. The
patent abstract shows that the invention discloses a preparation method of modified phosphogypsum-activated red mud-based foam concrete, which comprises the following steps of: (1) mixing original red mud with water and performing filter pressing to obtain filter pressing water and filter pressing red mud paste, and respectively performing pretreatment to obtain pretreated red mud powder and filter pressing water clear liquid; (2) loading the phosphogypsum fine powder, the pretreated red mud powder and the clear liquid above the filter pressing water into a tank filled with CO2 gas for carbonization reaction, and adding cement for aging to obtain phosphogypsum pretreated slurry; (4) mix that pretreated red mud pow, mineral powder, fly ash, phosphogypsum pretreated slurry, a crystal regulator, cement, a modifier, wat and a water reducer to obtain a red mud modified phosphogypsum slurry material; and (5) adding foam, mixing and stirring, and pouring and curing to obtain the modified phosphogypsum-excited red mud-based foam concrete. The invention solves the problems of alkali return, slow setting surface collapse and low solid waste utilization rate of the existing product.
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