引领磷化工绿色变革——记中国五环半水-二水湿法磷酸制备技术

Core Insights - China's Wuhuan Engineering Co., Ltd. has developed a semi-hydrate and dihydrate wet phosphoric acid preparation technology, which has been included in the first batch of advanced applicable technologies announced by the Ministry of Industry and Information Technology [1] - This technology addresses key bottlenecks in the industry, achieving a 52% reduction in overall energy consumption, a phosphorus recovery rate of 98.5%, and a total phosphorus content in phosphogypsum below 0.5%, providing a reference for the green transformation of the phosphochemical industry [1] Industry Challenges - The traditional wet phosphoric acid production technology faces significant challenges, including low efficiency in utilizing medium and low-grade phosphate ores, leading to resource waste [2] - High energy consumption and pollution during the production process, particularly the generation and handling of phosphogypsum, are major constraints on the sustainable development of the industry [2] - Approximately 5 tons of phosphogypsum are produced for every ton of phosphoric acid, which occupies large land areas and poses environmental pollution risks [2] Technological Advancements - The new technology significantly enhances the utilization efficiency of medium and low-grade phosphate ores, broadening the resource utilization scope [3] - Compared to traditional dihydrate processes, the new technology reduces overall energy consumption by 52% and increases phosphorus recovery rates to over 98%, improving economic benefits for enterprises [3] - The phosphoric acid produced meets the quality requirements for various downstream products, supporting the development and application of fine phosphates [3] Environmental Benefits - The technology offers advantages in phosphogypsum treatment, producing high-quality by-product gypsum with reduced water-soluble phosphorus content, facilitating harmless treatment and resource utilization [3] - The by-product gypsum can be processed into construction materials and roadbed materials, achieving solid waste resource utilization and meeting environmental safety standards [3] Production Capacity - A total of 12 wet phosphoric acid production units have been established domestically and internationally, with a total capacity of 2.8 million tons per year [5] - The Yidu Xingfa Chemical Co., Ltd. has the largest single-series semi-hydrate and dihydrate wet phosphoric acid unit globally, with a capacity of 380,000 tons per year, achieving full domestic equipment localization and meeting international advanced technical and economic indicators [5] Future Outlook - The technology is expected to reduce carbon dioxide emissions by 121,000 tons annually, save 50,000 tons of standard coal, and save approximately 3.5 million yuan in investment [6] - The technology has been implemented in countries along the Belt and Road Initiative, such as Tunisia and Egypt, supporting local phosphochemical industry development [6] - The company aims to further enhance the comprehensive utilization of phosphogypsum and develop more energy-efficient and environmentally friendly production processes for sustainable development in the phosphochemical industry [6]