铬盐废渣解毒研究

Investigation of chromium salt dreg detoxification

通过试验测定了长沙铬盐厂铬盐废渣的性质。正交试验研究得出了以硫酸铵 [( NH4 ) 2 SO4 ]为解毒剂的铬渣干法解毒最佳工艺。即以粒径为 75 μm铬渣与加入量为 13.3% (质量百分比 )、粒径为 42 7μm的硫酸铵混合均匀 ,于 5 0 0℃急速加热 30 min、闭炉门冷却 ,解毒处理效率达 96.41%。

Characteristics of chromium salt dreg discharged from Changsha Chromium Salt Factory was investigated. Optimum processing parameter and route of chromium dreg detoxification were obtained with cross-test experiment. Experiment results indicated that detoxification rate of 96.41% was achieved with a starting mixture of 75 μm chromium dreg and 427 μm(NH-4)-2SO-4 (13.3% weight percent) heating at 500 ℃ for 30 min ,followed by door-sealed cooling.