【摘要】 采用水泥固化的方法对铬渣进行处理。在水泥与铬渣、砂、水、硅酸钠的质量比为1:0.6:0.45:0.15:0.1时固化效果较好。固化体经28 d的养护后,表面Cr6+的浸出率为10-5数量级,即使破碎至5 mm以下的粒度,其Cr6+的浸出质量浓度仍在国家标准以下。模拟酸溶试验和固化体抗压强度测试结果表明,固化体用于填埋是长期安全的。更多还原

【Abstract】 Chromium residue was treated by solidification process with cement. The effect of solidification is better when cement, chromium residue, sand, water and sodium silicate are mixed in the proportion of 1:0.6: 0.45:0.15:0.1. After 2 8 days of curing , the leaching rate of Cr6 + from the surface of solidified body is about10-5.Even if solidified body is broken up to grains of 5 mm,the concentration of Cr6+ in leaching liquor can meet the national standard. Simulated acid rain elutriation and compressive strength experiment show also that the landfill of solidified body is safe for a long time.更多还原