某金属矿区水系整治工程淤泥固化试验

Sludge Solidification Test of Water System Renovation Project in a Metal Mining Area

为推进金属矿区水系淤泥的无害化处理,针对金属矿区周边河道淤泥中重金属的固化效果开展了研究。选用水泥、石灰、固化剂对淤泥进行固化试验,并对不同养护龄期的试块进行抗压强度测试和重金属浸出毒性检测。试验结果表明:在固化剂用量0.022%、石灰用量10%、水泥用量6%的条件下,样品力学性能较优,养护7 d后的样品抗压强度为0.78 MPa,同时重金属固化效果最佳,均低于GB/T41015限值;该研究可为水系淤泥无害化处理提供有效途径,以保障金属矿区水系环境的安全。

In order to promote the harmless treatment of water system sludge in metal mining areas,the solidification effect of heavy metals in river sludge around metal mining areas is studied.In the experiment,cement,lime and curing agent are used to solidify the sludge,and the compressive strength test and heavy metal leaching toxicity test are carried out on the test blocks of different curing ages.The test results show that the mechanical properties of the samples are good under the conditions of curing agent dosage of 0.022%,lime dosage of 10%and cement dosage of 6%.The compressive strength of the samples after 7 days of curing is 0.78 MPa,and the curing effect of heavy metals is the best,which is lower than the limit value of GB/T 41015.The study can provide an effective way for the harmless treatment of water system sludge to ensure the safety of water system environment in metal mining areas.