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以六盘水矿区的煤矸石为原料,采用酸浸的方法提取其中的铝铁元素合成了水处理剂PAFS,并用酸浸滤渣合成了P型分子筛。研究结果表明:将洗矸350℃低温氧化2 h,用40%的硫酸按固液比1∶3.5在90℃酸浸4.5 h,再将滤渣于750℃焙烧2 h,用一次酸浸液进行酸浸。最终铝铁浸溶率分别为73.91%、91.97%,用二次酸浸液合成的PAFS在24 h的去浊率可达99.989%。将干燥后的滤渣与氢氧化钠按质量比1∶1.1混合研磨均匀,于750℃碱融2 h,水淬,于60℃老化2.5 h,以95℃晶化7 h可合成结晶较好的P型分子筛。
Taking coal gangue in Liupanshui mining area as raw material, the acid-leaching method was used to extract the aluminum-iron elements to synthesize the PAFS of water treatment agent and the P-type molecular sieve was synthesized by acid leaching residue. The results showed that: the waste rock was oxidized at 350 ℃ for 2 h, acid-leached with 40% sulfuric acid at a solid-to-liquid ratio of 1: 3.5 at 90 ℃ for 4.5 h, and the residue was calcined at 750 ℃ for 2 h. Acid leaching. The final leaching rates of aluminum and iron were 73.91% and 91.97% respectively. The turbidity of PAFS synthesized by secondary acid leaching solution reached 99.989% at 24 h. The dried residue was mixed with sodium hydroxide at the mass ratio of 1: 1.1 and ground uniformly. The base was thawed at 750 ° C for 2 h, quenched at 60 ° C for 2.5 h, and crystallized at 95 ° C for 7 h. P-type molecular sieve.