江西临川高岭土除铁增白研究

摘要

The iron removal and bleaching experiment on Linchuan kaolin from Jiangxi was conducted, using oxalic acid as a soaking agent and complexing agent. The inlfuence of temperature, soaking time, and times of repetition on its iron removal and bleaching result was investigated, and the best iron removal and bleaching scheme was worked out. When soaked 6 hours for 3 times at 90°C, Linchuan Kaolin exhibited the best iron removal and bleaching result with its whiteness up to 86.4%from 23.5%.%以江西临川高岭土为研究对象，以草酸为酸浸剂和络合剂进行除铁增白实验，考察实验的温度、时间、酸浸次数等因素对除铁增白的影响，得出最佳的除铁增白方案。最佳增白方案为：在90℃条件下，酸浸6 h，重复3次。除铁增白后，白度由原来的23.5%提升到86.4%。