Metal recovery from fly ash generated from vitrification process for MSW ash
Metal recovery from fly ash generated from vitrification process for MSW ash
复制标题
从城市生活垃圾灰烬玻璃化过程产生的飞灰中回收金属
DOI：
10.1016/s0956-053x(96)00092-x
复制
发表时间：
1996
期刊：
影响因子：
8.1
通讯作者：
Chiaki Izumikawa
中科院分区：
文献类型：
--
作者：
Chiaki Izumikawa
含有金属的废物必须小心处理，因为重金属在不受控制的条件下可能会在堆填区被淋出。因此，重金属基本上应该被回收并永远循环利用。从这个角度出发，笔者一直在尝试开发一种从有毒的玻璃化飞灰中回收重金属的技术，并将其回收到冶炼厂。经过大量的实验室试验，成功地进行了中试试验，开发的工艺已被证明是可以商业化实现的。该工艺的主要特点是回收几乎100%的重金属，同时将铅冶炼厂回收的金属与锌冶炼厂回收的金属分离，该工艺的输出只是冶炼厂可回收的冶金产品和排放到环境中的废水。从自然资源和环境保护的角度来看，该工艺被认为是处理有毒飞灰的理想工艺。
Metal-bearing wastes have to be carefully treated because heavy metals could be leached out under uncontrolled conditions when disposed of in a landfill. Consequently, heavy metals should be principally recovered and recycled forever. From this standpoint, the author has been trying to develop a technology to recover heavy metals from toxic vitrification fly ash for recycling to smelters. After a number of laboratory-scale experiments, pilot plant tests were successfully carried out and the developed process has been proven to be commercially realized. The main features of the process are that it recovers almost 100% of the heavy metals, simultaneously separating the metals which are recovered in a lead smelter from those in a zinc smelter, and that the output of the process are only metallurgical products recyclable for smelters and the effluent water which can be released into the environment. The process is considered an ideal one for the treatment of toxic fly ash from the viewpoint of not only natural resources but also environmental conservation.