(東北大學(xué) 材料與冶金學(xué)院，沈陽 110819)
摘 要: 研究活性炭對(duì)含鈷礦物搖瓶生物浸出的影響。結(jié)果表明：在浸出過程中，由于原電池效應(yīng)，添加活性炭加速硫銅鈷礦的氧化溶解，鈷的浸出率也隨之提高。添加1.0 g/L活性炭，在礦漿濃度為10%、浸出溫度為45 ℃、轉(zhuǎn)速為180 r/min的條件下，鈷浸出率提高22.06%，銅浸出率提高15.43%。粒狀活性炭與粉末狀活性炭具有相同的催化效果，硫銅鈷礦的生物浸出不受活性炭形狀影響，生物浸出過程中可以用活性炭顆粒代替活性炭粉末。pH值對(duì)活性炭對(duì)鈷離子的吸附有控制作用，隨著pH值降低，活性炭對(duì)鈷離子的吸附量減小，浸出條件下金屬離子的損失可忽略。
關(guān)鍵字: 活性炭；催化作用；原電池效應(yīng)；生物浸出；硫銅鈷礦；吸附
（School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China）
Abstract:The catalytic effect of activated carbon on cobalt mineral bioleaching was studied. The results show that, with the presence of activated carbon, the carrollite dissolution rate accelerates and the cobalt recovery rate increases, which attributes to the galvanic interaction between the activated carbon and carrollite. When 1.0 g/L activated carbon and 20 g cobalt ore are added in the Erlenmeyer flasks that are incubated in a rotary shaker at 180 r/min and constant temperature at 45 ℃, the leaching rate of cobalt increases by approximately 22%, and the copper leaching rate improves by 15.43%. The catalytic effect of activated carbon particles is the same with that of powder on carrollite bioleaching. Therefore, it is feasible that, using activated carbon grain can improve the cobalt recovery, instead of powder. The adsorption of Co2+ by activated carbon is affected by pulp pH. With dropping pH, the adsorption capacity of Co2+ by activated carbon reduces.
Key words: activated carbon; catalytic effect; galvanic effect; bioleaching; carrollite; adsorption
