(1. 昆明理工大學(xué) 材料與冶金學(xué)院，昆明650093；2. 云南冶金集團(tuán)總公司 技術(shù)中心，昆明650031)
摘 要: 提出從含銦硫酸溶液中富集銦的試驗(yàn)方案：焙砂預(yù)中和—硫化鋅精礦還原—石灰石中和沉銦。在一定的實(shí)驗(yàn)條件下確定各個(gè)工序的最佳條件：焙砂用量為理論量的1.3倍，預(yù)中和后溶液的酸度大約降至6 g/L；硫化鋅精礦的用量為理論量的2.2～2.3倍，還原后溶液中Fe3+的濃度大約降至0.5 g/L；石灰石的用量為理論量的2.0倍，沉銦后溶液中In3+的濃度降至1 mg/L以下。在此最佳條件下，可使沉銦渣中銦的品位達(dá)到0.1%以上。
關(guān)鍵字: 銦；預(yù)中和；還原；中和沉銦
leaching solution bearing high content of indium
（1. Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
2. Technology Center of Yunnan Metallurgy Group Co., Kunming 650031, China）
Abstract:The process of calcine preneutralization-zinc concentrate reduction-limestone neutralization for indium precipitation from pressure leaching of zinc concentrate with different indium contents was investigated. Under a certain experimental condition, the optimal condition in every procedure was put forward. The dosage of calcine is 1.3 times of theoretic value, and the concentration of solution is about 6 g/L; the dosage of zinc sulfide mineral concentrate is 2.2−2.3 times of theoretic value, and Fe3+ concentration of solution after reduction is about 0.5 g/L; the dosage of limestone is double of theoretic value, and In3+ concentration of solution after reduction is 1 mg/L. Under this optimal condition, the content of indium sediment from precipitating is more than 0.1%.
Key words: indium; preneutralization; reduction; neutralization for precipitating indium
