【摘要】 采用高效重介旋流器(HMC)脱硫工艺后,部分非磁性矿物(磁尾)随介质进入煤泥水系统。研究表明磁尾次生矿泥赤铁矿(红色)等金属氧化物在水中不论是晶体或无定形状态都在表面结合配位水,构成水合金属氧化物和氢氧化物,具有很强的吸附混凝性能,架桥吸附粘土胶体、细粒煤和气泡表面,微凝聚改变了煤和粘土矿物胶体粒子双电层的Ζ电位,煤的可浮性随之改变,导致粘土矿物对浮选精煤的污染加重。为此,提出了“选前脱除磁尾”等污染控制新方法。更多还原

【Abstract】 Non-magnetics (magnetic separation tailings ) will enter into circulating water system following medium solids when HMC (high efficiency dense-medium cyclone craft) is adopted. Researches manifest that metal oxide in magnetic separation tailings, such as hematite (red) on crystal or amorphous phase, splices complexometric water. These constitute water-metal oxides and hydroxide with effective adsorbing and coagulating ability absorb clay minerals, fine coal and bubble surface. Micro-coagulation changes double electronic shell Zetasize of clay mineral and coal, and in the following comes the change of floatability of coal, which leads to an aggravation pollution of clay mineral to the coal processing by floating-choice. In this paper, some controlled methods, such as doffing tailings of magnetic before processing are put forward.更多还原