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在Fe_3O_4存在下以大同烟煤为主料、胜利褐煤为配煤,采用压块活性炭工艺制备了活性炭,表征了活性炭吸附性能、磁性能和孔结构,并通过正交实验,以焦糖脱色率为活性炭净水性能指标研究优化配煤比例及主要工艺参数.结果表明:无Fe_3O_4存在时向大同煤中配入褐煤不利于压块活性炭孔的发育;温度升高可强化活化剂对孔壁烧失作用,导致孔隙扩大;Fe_3O_4的催化作用促进中、大孔发育,提高活性炭焦糖脱色率,并给活性炭赋磁.添加质量分数为6%的Fe_3O_4时获得2组优化工艺参数,即:100%大同煤、活化温度980℃、活化时间3h,或大同煤与胜利褐煤质量比为80∶20、活化温度980℃、活化时间3.5h,可制得易于磁选分离、焦糖脱色率分别为79%和76%的优质水处理用活性炭.
In the presence of Fe_3O_4 Datong bituminous coal as the main material, Shengli lignite for coal blending, activated carbon activated carbon prepared activated carbon, characterized by adsorption properties of activated carbon, magnetic properties and pore structure, and through orthogonal experiments to caramel decolorization rate of The results showed that adding lignite to Datong coal is unfavorable for the development of activated carbon pores in briquette without Fe_3O_4, and increasing the temperature can enhance the burning loss of pore wall , Which leads to the enlargement of pores.The catalytic effect of Fe 3 O 4 promotes the development of mesopores and macropores, increases the decolorization rate of activated carbon, and demagnetizes activated carbon.When adding 6% Fe 3 O 4, two optimal parameters were obtained: 100% Datong coal, activation temperature 980 ℃, activation time 3h, or Datong coal and victory lignite mass ratio of 80:20, activation temperature 980 ℃, activation time 3.5h, can be easily separated by magnetic separation, caramel decolorization rates were 79 % And 76% of quality activated carbon for water treatment.