Abstract:The oily sludge of steel rolling contains a large amount of oil, complex organic compound, iron oxide and heavy metals, which are recognized as a hazardous solid waste. Conventional methods have limitations, such as incineration and landfill, which not only occupy a large area, but also cause the secondary pollution of the ecological environment. Based on the advantages of supercritical water oxidation (SCWO) technology for the treatment of organic waste, the test of the degradation of the oily sludge of steel rolling in Baosteel was conducted. Single factor analysis was used to determine the process parameters, the result showed that the reaction temperature was 440 ℃, the reaction pressure was 25 MPa, the time was 330 s, and the O2 excess was 300%, the removal rate of outflow COD was close to 98%, and the remaining solid volume decreased by about 98.5% after the reaction. In addition, the mass fraction of iron oxide in solids reached more than 30%, which can be used to achieve the resource utilization. In short, the reduction and harmless effects were obvious by using the SCWO technology for the treatment of the oily sludge of steel rolling, which achieved the exceptive goal and can provide a certain reference for the same type of oily sludge of steel rolling treatment in China.
彭利冲,李素芹,郭丽婷. 超临界水氧化轧钢含油污泥减量无害化处理[J]. 中国冶金, 2017, 27(5): 75-80.
PENG Li-chong,LI Su-qin ,GUO Li-ting. Reduction and harmless treatment for rolling oily sludge by supercritical water oxidation. China Metallurgy, 2017, 27(5): 75-80.