All-wet-process comprehensive utilization method of red mud

• Main Authors: WU CHENGSHUN, ZHU JIAWEN, YAN GUIQING, TANG WENHUI
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2021
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses an all-wet-process comprehensive utilization method of red mud. Calcium, aluminum, titanium, scandium and iron in red mud are comprehensively recovered by the inventor through reasonable process interpenetration, the cost is low, and the red mud is prepared into six kinds of middle-and-high-end chemical products circulating in the market, such as calcium sulfate whisker, aluminum oxide, titanium dioxide, scandium oxide, ferrous sulfate and battery-grade iron phosphate. In addition, the method is completely a wet method, main equipment only include a reaction tank and a filter press, special equipment is not needed, and the investment is relatively low. At present, the red mud is piled up to one billion tons in China, millions of tons of red mud are produced in each aluminum oxide plant every year, wet treatment is flexible, the production scale can be infinitely expanded, pyrogenic treatment equipment is special, the treatment scale is limited, energy consumption is high, and if the me