碲回收 碲回收潍坊

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Comprehensive Recovery of High Tin Slags

Abstract: Considering that high tin slags are rich in tin, tellurium and other elements, a study is made on an appropriate technology in comprehensive recovery of high tin slags. An emphasis is put through a single factor test on examination of the effects of leaching tins and telluriums by the factors such as free alkali concentration, liquid-solid ratio, reaction temperature, reaction time and H2O2 amount and an optimum technology parameter is obtained. The study shows that at the experiment of sodium stannate products made from tins which are recovered from high tin slags. the direct recovery of tins amounts to 75.80% with a recovery rate of 93.90% and the recovery of telluriums is 97.36%, from which a satisfactory effect is obtained and seperation and recovery of tins and telluriums are realized effectively.

Keywords: High Tin Slag, Tin, Tellurium, Comprehensive Utilization and Technology

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硒粉的制备或来源

硒是一种稀散元素,全球没有独立硒生产厂,一般电解铜镍时伴生硒,存在于电解阳极泥中。从铜电解阳极泥中回收提纯硒、碲的方法较多 :有苛性碱氧化加压浸出、氧化焙烧高温浸出 、低温氧化焙烧、稀硫酸浸出等,硒、碲还原大都采用二氧化硫还原、铜还原的方法。由于采取预先焙烧氧化的方法,存在设备较复杂动力设备维修费用高,二氧化硫气体对人体和环境危害较大,硒、碲回收率和纯度。而以H2O2作氧化剂,在弱酸性溶液中氧化硒和碲,固液分离后调节pH分离硒和碲,在盐酸酸化下用Na2SO3还原硒和碲,硒和碲回收率分别为99%和98%,纯度均可达99%。

硒粉在空气(湿度高)中多少度氧化

硒粉在空气(湿度高)中多少度氧化

硒是一种稀散元素,全球没有独立硒生产厂,一般电解铜镍时伴生硒,存在于电解阳极泥中。从铜电解阳极泥中回收提纯硒、碲的方法较多 :有苛性碱氧化加压浸出、氧化焙烧高温浸出 、低温氧化焙烧、稀硫酸浸出等,硒、碲还原大都采用二氧化硫还原、铜还原的方法。由于采取预先焙烧氧化的方法,存在设备较复杂动力设备维修费用高,二氧化硫气体对人体和环境危害较大,硒、碲回收率和纯度。而以H2O2作氧化剂,在弱酸性溶液中氧化硒和碲,固液分离后调节pH分离硒和碲,在盐酸酸化下用Na2SO3还原硒和碲,硒和碲回收率分别为99%和98%,纯度均可达99%。

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