某油页岩尾渣制备优质煅烧高岭土的研究

介绍了油页岩尾渣制备煅烧高岭土的工艺,采用强磁选、酸浸、氯化焙烧等提纯作业,可有效地除去油页岩尾渣中的Fe2O3、TiO2等显色杂质矿物,Fe2O3和TiO2的脱除率分别为69 8%和14 0%,最终产品的Fe2O3、TiO2分别降至0 76%、1 08%;并使产品白度达91度。采用湿磨→提纯→焙烧→超细磨矿工艺,可制备出满足造纸工业技术要求的优质煅烧高岭土。

STUDY ON PRODUCING HIGH-QUALITY CALCINED KAOLIN USING BROKEN BITS OF OIL SHALE

This paper introduces the technology of producing calcined kaolin using broken bits of oil shaleImpurities such as Fe2O3,TiO2 can be effectively removed from sediment of oil shale,adopting such purification operations as magnetic separation,acid leaching and chloridizing roastingThe removal rates of Fe2O3 and TiO2 are 698% and 140% respectivelyThe Fe2O3 and TiO2 contents of the final product are reduced to 076% and 108% respectivelyThe whiteness degree of the product may be up to 91The calcined kaolin used for paper making industry can be produced using the processing of wet grinding purification roasting ultrafine grinding