The Utilization Of Industrial By-product Gypsum Continues To Expand

Gypsum is a typical low-carbon, green and recyclable building material. With the reduction of natural gypsum, industrial by-product gypsum is widely used in engineering. Recently held in Guilin, Guangxi Province, Marine materials innovation and industrial by-product gypsum utilization seminar, a number of industry experts pointed out that under the background of "double carbon", industrial by-product gypsum products are low-carbon products, its wide application will contribute to the carbon emission reduction of building materials industry. In view of the high value utilization of industrial by-product gypsum, professor Duan Pengxuan of Guilin University of Technology said that industrial by-product gypsum is a high-quality gypsum raw material, and industrial by-product gypsum that meets the quality requirements can produce high quality gypsum products. With qualified gypsum citrate, phosphogypsum and desulphurized gypsum as raw materials, the autoclaved microcrystalline process can be used to produce high quality α-hemihydrate gypsum products with technical properties above α40. The development of α-gypsum is the only way for the technical progress of gypsum industry. Duan Pengxuan pointed out that at present, gypsum products with industrial by-product gypsum as raw materials are widely used in the field of architectural interior decoration, which has significant social, environmental and economic benefits, and can make due contribution to carbon emission reduction. In view of the current difficult use of phosphogypsum utilization problem, professor Liu Gang of Wuhan University of Technology pointed out that the warm grinding process of phosphogypsum can improve the strength and volume stability of phosphogypsum cement, the expansion of perphosphogypsum cement can reduce the dry shrinkage cracking of road water stable base, compared with ordinary Portland cement, The synthetic aggregates based on perthiophosphorsum and phosphogypsum have better gelling properties. "In recent years, the utilization of Chinese industrial by-product gypsum has been broadened, expanded in scale and improved in technical level." Yuan Hongwen, chairman of Zhongshan Jiake Environmental Protection Technology Co., LTD., believes that there are still many problems to be solved in the current development of the industry, which requires continuous efforts of the industry. As a typical enterprise of phosphogypsum comprehensive application, Yang Bulei, chief engineer of Green Environmental Protection Industry Company of Guizhou Phosphogypsum Group, discussed the industrial development path of phosphogypsum comprehensive utilization based on the company's practice. Sun Zhenping, professor of Tongji University, systematically analyzed the composition of phosphogypsum obtained from samples taken in Guizhou, Sichuan and Hubei, and designed the composition of phosphogypsum composite cementing material according to the reaction kinetics of hydraulic composite cementing material and the expectation of target hydration products. It can be said that with the development of the industry and the progress of technology, the comprehensive utilization of industrial by-product gypsum will usher in greater development opportunities.