焦作煤系高岭土煅烧增白技术研究     

许光泉  梁修雨  赵宏海 《中国煤炭地质》2008,(9):11-13

焦作地区高岭石粘土矿主要赋存在石炭系中统本溪组,是非常优良的高岭土资源。本次实验以焦作地区煤系高岭土为原料,进行矿物成分和含量分析,研究其煅烧过程中添加剂的种类、用量、入料粒度、煅烧时间、煅烧温度等因素对白度的影响。研究表明：在900°C时样品加盖煅烧4小时并添加5%的还原剂和2%氯化剂做添加剂,试样的白度由45.84%增加到了88.68%,满足了橡胶填料、中等造纸涂料的需要,为本地区煤系高岭土的开发利用提供了重要的依据。  相似文献   

Property and performance amelioration of pelagic clay from the East Pacific     

Peiping ZHANG  Shufeng LIU  Xuefa SHI  Huahua LU  Juanjuan LIU  Xiaoguo CHI.College of Earth Sciences  Jilin University  Changchun  China 《东北亚地学研究》2008,11(2):110-114

To make use of the pelagic clay as polymer filling, the properties of clay sediments from the ocean investigation zone of China in the East Pacific were studied by the SSA, XRF, ICP/MAS, FTIR, XRD, SEM, DTA/TG and granularity distributing etc. , and experiments were settled to improve the whiteness and activation of the clay based on these data. Compared with land clay, pelagic clay holds many particular features, such as fine particles and incompact accumulation, worse crystallization and more defects, high activity, complex mineral and chemical components, and low whiteness etc. Processing the purified pelagic clay with acids and zinc, then baked it at different temperatures, the whiteness of clay can be increased from 23.8% to 73.1%, and the optimized conditions is： consistency of vitriol 25%, ratio of clay to water 4： 1, reaction time 4h, reaction temperature 90℃, dosage of zinc 2.0 g/L, and baking temperature 700℃. And the SSA of whited clay is increased too. Using the dry milling method to modify the pelagic clay with organic reagents, the optimized technique is KH550, concentration 1.5%, reaction time 20 min. XRD, FTIR and SEM testing indicate that the mechanism of organic activation was mainly surface absorbing and chemical combination secondly.  相似文献