| Abstrakt: |
In the present work, a novel iron-carbon micro-electrolysis filler was proposed to address the problems of short service life, blockage of electrolysis device, and clumping of traditional iron-carbon micro-electrolytic fillers. In this study, solid steel wastes were used to prepare a purifying agent to treat coking effluent. By using the solid wastes (steelmaking sludge, blast furnace gas slime, and mill scale) generated in the production process of iron and steel enterprises, with a small amount of anthracite as raw materials, carbon-containing metalized briquettes were prepared after 15 min of reduction under high-temperature conditions in a carbon tube furnace. The briquettes that contained 70%-90% iron, 10%-30% carbon, and had a porosity of 63% could be used as a purifying agent to treat coking wastewater. Under optimal conditions, the chemical oxygen demand of wastewater could be reduced by 40%, and the aerobic biodegradability B/C could be increased by 43%. Thus, adopting the idea of "using waste to treat waste" (coking sewage) is economically and environmentally. Besides, this technology efficiently uses iron and carbon-containing dust and other waste resources from steel plants. [ABSTRACT FROM AUTHOR] |
