氧化浸出鎳鉬礦冶煉煙塵中的硒
(1. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083；2. 金川有色金屬公司，金昌 737100)
摘 要: 對在H2SO4-HCl-H2O復(fù)合體系中氧化浸出鎳鉬礦冶煉煙塵中的硒進(jìn)行熱力學(xué)分析，確定從鎳鉬礦冶煉煙塵中浸出硒的新工藝及其最優(yōu)技術(shù)參數(shù)。采用XRD對鎳鉬礦冶煉煙塵及其浸出渣進(jìn)行表征。結(jié)果表明：在最佳技術(shù)條件下，硒浸出率達(dá)到98%，浸出渣含硒0.16%(質(zhì)量分?jǐn)?shù))；冶煉煙塵中硒以單質(zhì)形式存在，未見硒及其化合物出現(xiàn)，表明煙塵中的硒浸出較完全；浸出渣主要由SiO2、CaSO4、Al2SiO5、As2O3和KAlSi3O8組成。
關(guān)鍵字: 鎳鉬礦；硒；煙塵；氧化浸出；熱力學(xué)
mixing solution system of H2SO4-HCl-H2O
（1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Jinchuan Nonferrous Metals Corporation, Jinchang 737100, China）
Abstract:The thermodynamics of oxidized leaching selenium from Ni-Mo ore smelter dust in mixing solution system of H2SO4-HCl-H2O was analyzed, and a novel process and its optimum parameters for leaching selenium from Ni-Mo ore smelter were determined. Both Ni-Mo ore smelter dust and its leaching residue were characterized by XRD. The results show that, under the optimum conditions, the leaching rate of selenium reaches 98%, and the selenium in leaching residue is only 0.16% (mass fraction). The selenium in smelter dust exists in the form of elemental selenium, but no selenium and its compounds are detected in leaching residue. The leaching residue is mainly composed of SiO2, CaSO4, Al2SiO5, As2O3 and KAlSi3O8, which indicates that the leaching of selenium is almost , complete.
Key words: Ni-Mo ore; selenium; smelter dust; oxidized leaching; thermodynamics
