(中南大學(xué) 冶金與環(huán)境學(xué)院，長(zhǎng)沙 410083)
摘 要: 介紹鈷冶煉工藝及P204反萃液產(chǎn)出，總結(jié)P204反萃液處理方法的研究進(jìn)展，提出有價(jià)金屬的控電位選擇性分離的技術(shù)。通過熱力學(xué)計(jì)算并繪制Me-S-H2O系φ-pH圖，從理論上證明有價(jià)金屬的控電位選擇性硫化分離技術(shù)可行；分別研究了控電位硫化除銅、控電位硫化除鈷與黃藥除鈷、控電位硫化沉鋅和中和沉錳4個(gè)過程的實(shí)施效果。結(jié)果表明：該方法可以實(shí)現(xiàn)有價(jià)金屬的分步分離且金屬回收率均可達(dá)到99%以上，沉淀物硫化銅、黃原酸鈷、硫化鋅和碳酸錳都可以作為冶煉原料再利用，處理后液為無害溶液可直接排放。實(shí)現(xiàn)了P204反萃液中有價(jià)金屬分步沉淀和無害化處理的雙重目的。
關(guān)鍵字: 鈷；反萃液；控電位分離；硫化沉淀
（School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:The production of P204 stripping solution was introduced and the common treatments of P204 stripping solution were summarized. The value metals selective separation under potential controlling from P204 stripping solution was proposed. And then, the φ-pH diagram of Me-S-H2O system was plotted based on thermodynamic calculation. Finally, both the selective separation under controlling potential of Cu, Co and Zn and Mn carbonate precipitation were studied, respectively. The precipitation rates of Cu2+, Co2+, Zn2+, and Mn2+ were as high as 99%. The precipitates, CuS, Co(C2H5OCSS)2, ZnS and MnSO4, can be reused as raw materials in metallurgy. The effluent is eco-friendly to discharge. Therefore, the goal of valuable metal selective precipitation and the less-hazardous handling of P204 stripping solution were achieved.
Key words: cobalt; P204 stripping solution; separation under potential controlling; sulfide precipitation
