Flocculation Settling Characteristics of Ultra-Fine Iron Tailings with Rich Gypsum

Because of the uniqueness geological mineralization, tailings obtained from Chenchao Iron Mine have low SiO2 content only 27.80%. Content Al2O3 and MgO is 13.31% CaSO4 22.09%. The fineness modulus ores large enough for convenient mineral separation, thus resulting in 16.03% −5 μm particles 27.76% −10 tailings, respectively. average particle size 69.36 μm; it belongs to category very fine tailings. natural sedimentation extremely slow due comprehensive effects their physical chemical properties. Hence, tests using four types flocculating agents are conducted accelerate Mine. Compared with sedimentation, considerably quicker. Among flocculants, sample special BASF flocculant fastest. When 1 ton add this 20 g, maximum settling concentration reaches 60.98% after 40 min its gravity 1.577 g/cm3, fulfills future requirements filling technologies. As largest iron mine mid-southern region China, must turn mining. This study can provide technological support goaf management environment-friendly treatment solid waste Yangtze River basin, which plays important roles ecological protection.