由蛇纹石提镁残渣制备δ-层状结晶二硅酸钠  

Preparation of δ-crystalline layered sodium disilicate by residue after extracting magnesium from serpentine ore

作　　者：曹星辰[1] 于少明[1] 陶淼[1] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009

出　　处：《化工矿物与加工》2013年第6期4-7,共4页Industrial Minerals & Processing

基　　金：安徽省自然科学基金资助课题(98523039)

摘　　要：以蛇纹石提镁残渣、烧碱为原料制备δ-层状结晶二硅酸钠。制备过程包括蛇纹石提镁残渣碱浸、调模、干燥、煅烧等工序。重点探讨了溶液模数、干燥温度、干燥时间、煅烧温度、煅烧时间等因素对产品钙、镁离子交换能力的影响。实验确定的δ-层状结晶二硅酸钠最佳制备工艺条件为:溶液模数2.0、干燥时间和温度分别为2.5h和160℃,煅烧时间和温度分别为30min和720℃。该工艺条件下制备的产品的钙、镁离子交换能力均值为319mg/g和420mg/g。XRD分析结果表明主产物为δ-层状结晶二硅酸钠。The a-crystalline layered sodium disilicate was pre-pared by using the residue after extracting magnesium from ser-pentine ore and solid sodium hydroxide as raw materials. The processes included alkaline leaching of the residue after extracting magnesium from serpentine ore, adjusting modulus, drying and calcinating. The study focused on the influence of the modulus of solution, drying temperature and time, calcination temperature and time on the product calcium and magnesium ion-exchange ca-pacity. The optimum conditions for the preparation of δ-crystal-line layered sodium disilieate were that the modulus of solution was 2.0, drying temperature was 160 ℃, drying time was 2.5 h, calcination temperature and time were 720 ℃ and 30 min respec-tively. Under such conditions, the calcium ion-exchange capacity the magnesium ion-exchange capacity for the product reached 319 mg/g and 420 mg/g on average respectively. The result of XRD analysis suggested that the main product was δ-crystalline layered sodium disilicate.

关 键 词：蛇纹石 提镁残渣 Δ-层状结晶二硅酸钠 钙 镁离子交换能力 

分 类 号：TD985[矿业工程—选矿]