微波辐照铬渣解毒的工艺研究
Technologic research on detoxification of residue with chromium through radiation of microwave
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摘要: 根据含铬废渣的污染特性，利用煤、污水处理厂脱水污泥和紫茎泽兰秸杆作还原剂，在微波辐照下进行单因素与多因素正交还原解毒实验。实验表明，紫茎泽兰秸杆和脱水污泥的解毒效果优于煤，并且得出在实验条件范围内，干法微波解毒的最佳工艺条件为：紫茎泽兰秸杆作还原剂，物料配比为6 g秸杆∶4 g铬渣，微波功率为500 W、升温900 ℃。该工艺条件不仅解毒效果好，而且费用与能耗较低，对实现以废治废，推进循环经济具有现实意义。Abstract: According to the pollution characteristics of residue containing chromium, using microwave to heat materials, and using coal, the straw of eupatorium adenophorum spreng and the dehydrated mud that comes from wastewater treatment plant as reducing agents, this paper presents the single factor and multiple factors ortho-deoxidize detoxification experiments on residue containing chromium. The experimental results show that detoxification effect of the straw of eupatorium adenophorum spreng or the dehydrated mud is better than coal’s. The good experimental conditions for dry microwave detoxification are as follows: the straw of eupatorium adenophorum spreng is used as reducing agent, the ratio of eupatorium adenophorum spreng with residue containing chromium is 6∶4, the microwave’s power is 500 W, the temperature is 900 ℃. This technological condition is not only good for detoxification, but also good for reducing energy consumption, and good for recycling economy development.
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