不同稳定化药剂对含Ni废催化剂固化/稳定化效果研究

Experiments on Solidification / Stabilization of Nickel Polluted Waste Catalyst with Different Stabilizing Agents

分别研究了磷酸二氢钠（NaH2PO4）、人造沸石、胺三乙酸（NTA）和乙基黄原酸钾4种药剂单独稳定化处理废催化剂及其协同水泥固化/稳定化处理废催化剂的效果。研究结果表明：稳定化药剂最佳添加量为2%,NaH2PO4、人造沸石、NTA和乙基黄原酸钾对废催化剂中Ni的稳定化比率分别为85.7%,94.6%,75.0%和99.7%,并且人造沸石和乙基黄原酸钾稳定化处理后的产物可在相当宽的pH值范围内保持稳定。4种药剂协同水泥固化/稳定化处理废催化剂后的固化试块均较单独水泥固化试块的重金属Ni浸出量降低14.7%~82%,其中人工沸石的加入使得水泥固块的无侧限抗压强度明显增加,并同时对废催化剂固块中的重金属Ni起到更好的固定作用。

The waste catalyst was solidification treated by 4 stabilizing agent of sodium dihydrogen phosphate anhydrous（NaH2PO4）, Artificial zeolite, Nitrilotriacetic acid（NTA）, and Potassium ethyl xanthate, the effect of stabilizing agent dosage on heavy metal leaching of Nickel of waste catalyst and its text blocks were investigated. The results showed that when 2% scales medicament was used, the ratio of stabilization by NaH2PO4, Artificial zeolite, NTA, and Potassium ethyl xanthate was 85.7%, 94.6%, 75.0% and 99.7%, respectively. The compression strength of cement test block could be improved in a certain degree after being stabilized by artificial zeolite. The compression strength of cement test block could be improved in a certain degree after being stabilized by artificial zeolite, which presented perfect performance on heavy metal fix effect.