CAJ | 학술논문

高比表面积改性煤系高岭土具有优异的性能，现已被广泛地应用于多种行业。本文以内蒙煤系高岭土为原料，将其高温煅烧制得偏高岭土后，再经盐酸改性用以制备高比表面煤系高岭土材料；通过X射线衍射(XRD)、差热-热重分析(DTA-TGA)和N2吸附-脱附等手段对改性前后煤系高岭土的晶体结构及比表面积进行了表征，实验考察了煅烧温度、煅烧时间、盐酸用量、盐酸浓度及反应时间对煅烧煤系高岭土比表面积的影响，确定了酸改性煤系高岭土的最佳工艺条件；在最佳工艺条件下制备的盐酸改性煤系高岭土材料的比表面积高达465 m2/g。
고비표면적개성매계고령토구유우이적성능，현이피엄범지응용우다충행업。본문이내몽매계고령토위원료，장기고온단소제득편고령토후，재경염산개성용이제비고비표면매계고령토재료；통과X사선연사(XRD)、차열-열중분석(DTA-TGA)화N2흡부-탈부등수단대개성전후매계고령토적정체결구급비표면적진행료표정，실험고찰료단소온도、단소시간、염산용량、염산농도급반응시간대단소매계고령토비표면적적영향，학정료산개성매계고령토적최가공예조건；재최가공예조건하제비적염산개성매계고령토재료적비표면적고체465 m2/g。
Large specific surface area activated coal-bearing kaolin which has excellent characters is widely used in various industries.In this study,kaolinite material with a large specific surface area was prepared from Inner Mongolia coal-bearing kaolinite by high temperature heat treatment and hydrochloric acid treatment.The crystal structure and specific surface area were characterized by using X-ray diffraction and N2 adsorption-desorption.The thermogravimetry analysis (TGA) and differential thermal analysis (DTA) were collected also.The effects of calcination temperature,calcination time,dosage of hydrochloric acid,concentration of hydrochloric acid and acid treatment time on the specific surface area of calcined coal-bearing kaolinite were investigated to determine the optimum condition.The maximum specific surface area of the kaolinite material prepared under the optimum condition was as large as 465 m 2/g.