武钢焦化综合废水用于高炉渣水淬的环境影响评估

Environmental Impact Assessment of WISCO Coking Comprehensive Wastewater for Blast Furnace Slag Water Quenching

针对武钢利用长江水进行高炉渣水淬而用水量大、成本较高的情况。为了改进高炉渣的水淬效果,提升高炉渣的质量,在对焦化废水进行混凝沉淀以及氧化的基础上,研究处理后的焦化废水用于高炉渣水淬对高炉渣以及周围大气的影响。结果表明:当利用处理后的焦化综合废水进行5次循环水淬后,冷却水中的氰化物浓度稳定在0.006mg/L左右,挥发酚浓度稳定在0.002mg/L左右,硫化物浓度稳定在0.011mg/L左右。水淬后蒸发的水蒸气中的氰化物、挥发酚以及硫化物浓度在1m范围内稳定在0.001mg/L左右。利用处理后的焦化生化废水进行5次循环水淬后,冷却水中氰化物、挥发酚与硫化物浓度分别为0.103,0.021,0.197mg/L,且呈稳定的上升趋势。利用处理后的焦化综合废水进行水淬的高炉渣与用长江水水淬的高炉渣相比,性能没有明显改变。

For the case of WISCO using the Yangtze River water for blast furnace slag water quenching,the water consumption is large and the cost is high. In order to improve the water quenching effect of blast furnace slag and improve the quality of blast furnace slag,on the basis of coagulation sedimentation and oxidation of coking wastewater,the effect of treated coking wastewater on blast furnace slag water quenching on blast furnace slag and surrounding atmosphere was studied. The results show that when the treated coking wastewater is used for 5 cycles of water quenching,the cyanide concentration in the cooling water is stable at about 0.006mg/ L,the volatile phenol concentration is stable at about 0.002mg/L,and the sulfide concentration is stable. About 0.011mg / L. The concentration of cyanide,volatile phenol and sulfide in the water vapor evaporated after water quenching is stable at about 0.001mg/L in the range of 1m. After 5 cycles of water quenching using the treated coking biochemical wastewater,the concentrations of cyanide, volatile phenol and sulfide in the cooling water were 0.103,0.021,and 0.197mg/L,respectively,and showed a steady upward trend. The performance of the blast furnace slag using the treated coking integrated wastewater for water quenching was not significantly changed compared with the blast furnace slag quenched with the Yangtze River water.