【摘要】 本文介绍了纱罩生产厂在生产过程中产生的废品纱罩（以下简称为废纱罩） 中钍的去除技术及其应用。经实验室实验、小试、中试直至工业规模处理，确定废纱罩除钍的主要工艺如下：废纱罩在５００ Ｌ陶缸中经２ ｍ ｏｌ／Ｌ硝酸两次浸泡及两次自来水清洗。实验结果表明，经上述工艺处理后废纱罩的除钍率达９９．９７％ ，残留钍含量小于１６０ Ｂｑ／ｋｇ，可作为一般废物用土埋或其他方法处理；浸泡过纱罩的硝酸溶液用ＴＢＰ萃取，稀盐酸反萃取，反萃取液补充硝酸钍后可在纱罩生产中回用。废纱罩处理过程中产生的废水可与纱罩厂生产废水一并处理本文介绍了纱罩生产厂在生产过程中产生的废品纱罩（以下简称为废纱罩） 中钍的去除技术及其应用。经实验室实验、小试、中试直至工业规模处理，确定废纱罩除钍的主要工艺如下：废纱罩在５００ Ｌ陶缸中经２ ｍ ｏｌ／Ｌ硝酸两次浸泡及两次自来水清洗。实验结果表明，经上述工艺处理后废纱罩的除钍率达９９．９７％ ，残留钍含量小于１６０ Ｂｑ／ｋｇ，可作为一般废物用土埋或其他方法处理；浸泡过纱罩的硝酸溶液用ＴＢＰ萃取，稀盐酸反萃取，反萃取液补充硝酸钍后可在纱罩生产中回用。废纱罩处理过程中产生的废水可与纱罩厂生产废水一并处理更多还原

【Abstract】 The paper describes thorium removal technology and its application in the handling of the waste gas lamp mantle that produced during the production of gas lamp process.After laboratory test ,pilot test ,trial run and engineering scale use,the thorium removal technology is mainly as follows:soak the waste gas lamp mantle into the ceramic vat with the nitric acid solution twice and wash it with the tap water twice.The volume of the ceramic vat is 500 L and the concentration of the nitric acid solution is 2 mol/L.After handling,the thorium removal rate can reach 99.97% and the residual thorium will be less than 160 Bq/kg.The waste gas lamp mantle can be buried under the ground or be handled in the other ways just as the harmless waste.The nitric solution,in which gas lamp mantle has been soaked,should be extracted with TBP,then backextracted with diluted hydrochloric acid.After supplementing the thorium nitrate into the backextracted liquid,the liquid can be reused in the gas lamp mantle production.The waste water from the handling process can be handled together with waste water from production process. (更多还原