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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
This paper introduces the removal technology and its application of thorium in the waste yarn cover (hereinafter referred to as waste yarn cover) produced by the yarn cover manufacturing plant in the process of production. After laboratory experiments, small test, pilot scale until industrial scale processing, to determine the main process of removing waste thorns yarn cover as follows: waste yarn cover in 500 L tank by 2 m ol / L nitric acid twice soaked and twice tap water cleaning. The experimental results show that after the above process, the removal rate of thorium is 99.97% and the content of residual thorium is less than 160 Bq / kg, which can be treated by soil burial or other methods as general waste. The nitric acid solution soaked in the yarn cover is extracted with TBP , Dilute hydrochloric acid back-extraction, stripping solution of thorium nitrate can be used in the production of yarn cover reuse. The waste water produced during waste scrim treatment can be treated together with the waste water from the yam factory. This paper introduces the removal technology and application of thorium from waste soot (hereinafter referred to as waste stencil) produced by the soot manufacturing plant in the process of production. After laboratory experiments, small test, pilot scale until industrial scale processing, to determine the main process of removing waste thorns yarn cover as follows: Waste yarn cover in 500 L tank by 2 m ol / L nitric acid twice soaked and twice tap water cleaning. The experimental results show that after the above process, the removal rate of thorium is 99.97% and the content of residual thorium is less than 160 Bq / kg, which can be treated by soil burial or other methods as general waste. The nitric acid solution soaked in the yarn cover is extracted with TBP , Dilute hydrochloric acid back-extraction, stripping solution of thorium nitrate can be used in the production of yarn cover reuse. The waste water generated during the disposal of the waste yarn cover can be treated together with the wastewater from the yarn cover factory