机械力活化对脱硫石膏制备硫酸钙晶须的影响  

Effect of Mechanical Activation Calcium Sulfate Whiskers Prepared by FGD Gypsum

作　　者：李强[1,2] 师长伟[1] 尚超 刘福立[1] 关智浩 LI Qiang;SHI Chang-wei;SHANG Chao;LIU Fu-li;GUAN Zhi-hao(College of Mining, Liaoning Technical University, Fuxin 123000, China;Research Center of Coal Resources Safe Mining and Clean Utilization, Liaoning Technical University, Fuxin 123000, China)

机构地区：[1]辽宁工程技术大学矿业学院,阜新123000 [2]辽宁工程技术大学煤炭资源安全开采与洁净利用工程研究中心,阜新123000

出　　处：《人工晶体学报》2017年第10期1918-1922,1935,共6页Journal of Synthetic Crystals

基　　金：辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金(LNTU15KF18);教育部博士点基金(20132121120004);辽宁工程技术大学校基金(23160082T)

摘　　要：对脱硫石膏原料进行机械力活化,然后采用降温重结晶法制备出硫酸钙晶须。借助扫描电镜、图像粒度分析仪和相关软件进行表征,并初步讨论了机械力活化对晶须成核和生长过程的影响。结果表明:经过机械力活化的脱硫石膏可以制备有较大长径比的硫酸钙晶须。在水浴反应温度为75℃,硫酸浓度为2.5 mol/L,机械力活化时间为3.5 h,浆料浓度为2%的条件下,制备的硫酸钙晶须平均长径比为150,平均直径为2.1μm。Preparation of calcium sulfate whisker used the raw material of FGD gypsum,which was on mechanical activation,through cooling recrystallization was studied.The effect of mechanical activation on the nucleation and growth of whiskers was discussed,which depended on SEM,image granularity analysis method and related software.The results shows that calcium sulfate whiskers with larger aspect ratio could be prepared by mechanical activation of FGD gypsum.The reaction temperature is75Tl,sulfuric acid concentration is2.5mol/L,mechanical activation time is3.5h.Moreover,in the condition of the slurry concentration of2%,the average aspect ratio of the prepared calcium sulfate whisker is150and the average diameter is2.1(jim.

关 键 词：机械力活化 脱硫石膏 硫酸钙晶须 降温重结晶法 

分 类 号：TQ343[化学工程—化纤工业]