【摘要】 本文尝试"煅烧—酸浸"提纯新工艺,以去除石英砂中铁、钛杂质。结果表明,其最佳工艺参数为:NaC l添加量2%,煅烧温度820℃,煅烧时间2h,酸液组成18%盐酸+2%氢氟酸,酸浸温度50℃。提纯后的样品中铁含量从66.4×10-6下降到0.8×10-6,钛含量从29.3×10-6下降到5.5×10-6。该工艺除Fe、Ti杂质效果显著,简单易行,具有较好的工业应用前景。更多还原

【Abstract】 A new purification technology involving the calcining and acid-leaching processes was attempted to remove Fe and Ti impurities from quartz sand.The contents of Fe and Ti impurities were analyzed by using the atomic absorption spectrometry.The optimum technological parameters were found as follows:the dosage of NaCl is 2%,calcining temperature is 820℃,calcining duration is 2h,the mixed acid solution is composed of 18% HCl and 2% HF,and acid-leaching temperature is 50℃.The results of this investigation showed that the contents of Fe and Ti impurities in purified quartz sand were remarkably decreased,the content of Fe impurities was dropped from 66.4×10-6 to 0.8×10-6,and the content of Ti impurities from 29.3×10-6 to 5.5×10-6.Due to its advantages of high efficiency and simplicity,the purification technology is promising for industrial application.更多还原