大理石尾矿碳化法制备文石晶须及其形貌分析  

Preparation of Aragonite Whiskers by Carbonization from Marble Tailings and its Morphology Analysis

作　　者：罗东山 彭同江[1,2,3,4] 孙红娟 丁文金[1,2] 耿乾[1,2] LUO Dongshan;PENG Tongjiang;SUN Hongjuan;DING Wenjin;GENG Qian(Key Laboratory for Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China;Institute of Mineral Materials & Application, Southwest University of Science and Technology, Mianyang 621010, China;Center of Forecasting and Analysis, Southwest University of Science and Technology, Mianyang 621010, China;Sichuan Engineering Lab of Nonmetallic Mineral Powder Modification & High-quality Utilization, Southwest University of Science and Technology, Mianyang 621010, China)

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010 [2]西南科技大学矿物材料及应用研究所,四川绵阳621010 [3]西南科技大学分析测试中心,四川绵阳621010 [4]西南科技大学四川省非金属矿粉体改性与高质化利用技术工程实验室,四川绵阳621010

出　　处：《矿产保护与利用》2019年第4期60-65,共6页Conservation and Utilization of Mineral Resources

摘　　要：以四川石棉县某大理石矿山的尾矿经预处理和煅烧所得生石灰为原料,氯化镁为晶型控制剂,采用碳化法制备文石晶须。通过X射线衍射、光学显微镜等分析手段对样品物相组成、微观形貌进行分析。考察了温度、MgCl2浓度及生石灰用量对样品中文石晶体含量和晶须形貌的影响。结果表明:在温度80℃、MgCl2浓度0.2mol/L、生石灰用量为6g/L时,可制备得到长度为40~50μm、直径为2~3μm、长径比为13~18的文石晶须。Aragonite whiskers were prepared by carbonization method , lime as raw materials, which was pretreated and calcined from marble talings, and magnesium chloride as a crystal control agent. The phase composition and morphology of the samples were analyzed by X-ray diffraction and optical microscopy. The effects of temperature, MgCl 2 concentration, and lime dosage on the aragonite crystal content and the whisker morphology were studied. The results show that aragonite whiskers with a length of 40~50 μm, a diameter of 2~3 μm and a length-diameter ratio of 13~18 can be prepared when the temperature is 80 ℃, the concentration of MgCl 2 is 0.2 mol/L and the dosage of quicklime is 6 g/L.

关 键 词：大理石尾矿 生石灰 文石晶须 碳化法 晶型控制剂 

分 类 号：X751[环境科学与工程—环境工程]