STUDY ON TREATMENT OF AMMONIA LEACHING SLAG IN THE METALLURGICAL PROCESS OF TUNGSTEN

来源期刊：中南大学学报(英文版)1995年第2期

论文作者：Sun Peimen Li Honggui Li Yunjiao Liu Maosheng Su Pengtuan Wei Zhiquan Jian Detai

文章页码：21 - 26

Key words：ammonia leaching slag; mechanically activated decomposition; sodium carbnate; leaching efficiency

Abstract: The research of recovering WO₃ from ammonia leaching slag in the extractive process of tungsten has been performed. The results show that the mechanically activated decomposition with Na₂CO₃ for ammonia leaching slag is feasible. After the treatment of ammonia leaching slag containing WO₃ 10%, the content of insoluble WO₃ in residue is 1 % ～2%and the tungsten recovery is 81 % ～ 90% when the total amount of Na₂CO₃ and NaOH is 4 times of their theoretical value and the slag is kept for 2 hours at 190 ℃. The obtained Na₂WO₃ solution can satisfy the requirements of subsequent production process after purification.