改进石灰卤水法制备Mg_OH_2.pdfVIP

30 6 ( ) V o l. 30 N o. 6 200 8 11 JOURNAL O F NAN J ING UN IV ERS ITY OF TECHNOLOGY ( N atural Sc ence Ed t on) N ov. 2008 M g( OH ) 2 张月琴, 叶旭初, 张林进 ( 南京工业大学 材料科学与工程学院, 江苏 南京 210009) : 采用制盐后的卤水为原料NH H O 和石灰乳作为混合沉淀剂, 以卤水为底液, 在 一定的工艺条件 制备 3 2 M g(OH ) . 考察反应温度陈化时间卤水的浓度和石灰乳溶液的滴加速率对M g ( OH ) 性能的影响, 并采用扫描电镜 2 2 ( SEM ) X 射线衍射( XRD )等分析手段对M g( OH ) 晶体结构进行表征. 试验结果表明, 在反应温度60 陈化时间15 h 2 卤水浓度08mo l/L石灰乳溶液的滴加速率7mL /m n时, 得到了过滤时间短钙镁质量比(简称钙镁比值)低和六方片状 的M g (OH ) 产品. 2 : 卤水; M g( OH ) 2 ; 混合沉淀剂; 钙镁比值* : TQ0 16 : A : 1671- 7627 ( 2008) 06- 0054 - 05 P reparation of m agnesium hydroxide by im proved b rinelim e route ZHANG Y ueq n, Y E Xuchu, ZHANG L nj n ( Co llege of M a ter a ls Sc ence and Eng neer ng, N an j ng U n vers ty of T echnology, N anj ng 2 10009, Ch na) Abs tract: M agnes um hydrox de w as prepared by sea b ttern and m x prec p tato r o f amm on a and lm e m lk to ob ta n the best techno log cal cond t ons, nc lud ng the react on tem pera ture, the ag ng t m e, the concentrat on o f sea b ttern, and the lm e m lk dropp ng rate. T he crystal conf gurat on w as character zed by scann ng electron m cro scope ( SEM ) and X ray d ffract on ( XRD) . Under the fo llow ng cond t ons of the react on temperature 60 , the ag ng tm e 15 h, the concentrat on of br ne 08 m ol/L and the dropp ng rate o f lm e m lk 7 mL /m n, the prepared m agnes um hydrox de of flake shape has a short f ltrate tm e