PREPARING POLYMERIZED ALUMINUM-IRON CHLORIDE WITH RED MUD

摘要

A new method is proposed for the preparation of polyaluminiumferric chloride (PAFC) with red mud. The dependence of pH ofthe PAFC on basicity, is discussed and the difference in the productsof the process of red mud hydrolysis from products in theprocess of sodium hydroxide hydrolysis is studied. The resultsshow that basicity increases with increasing pH, the preferred pHvalue is 3.5, and basicity is up to 85.55%. Comparing the appearanceof PAFC with that of crystalline aluminium chloride, polyaluminiumchloride by SEM, can indicate that the distribution ofmaterials is not uniform on the surface of PAFC. Energy Dispersiveanalysis indicates that the content of aluminum, iron, andoxygen accounts for 60.73% in the white areas, 43.95% in theblack areas in the process of red mud hydrolysis; whereas thecontent of aluminum, iron, and elements in the white areas is49.74%, 23.45% in black areas in the product from sodium hydroxidehydrolysis.