(東北大學(xué) 材料與冶金學(xué)院， 沈陽 110006)
摘 要: 根據(jù)鎳基合金電解加工渣泥的組成和熱力學(xué)分析，用水洗—浸出 —水解沉淀工藝處理這種渣泥。 試驗結(jié)果表明：氯化鈉、硝酸鈉和部分鉻鹽等可溶性化合物可以從渣泥中洗出；繼而的硫酸浸出過程中，可將洗后渣泥中的鎳、鈷和鉻浸出，而鎢和鉬留在浸出渣中。在浸出過程中，鎳和鈷的浸出率達(dá)98%。浸出液中的鉻可通過水解沉淀法以氫氧化鉻的形態(tài)除去，鉻的脫除率達(dá)94.44%。
關(guān)鍵字: 鎳基合金； 電解加工渣泥； 浸出
electromachining sludge of nickel alloy
（School of Materials and Metallurgy，
Northeastern University， Shenyang 110006， P.R.China）
Abstract:Recovery of nickel and cobalt from electromachining sludge of a nickel alloy was investigated. According to component of the sludge and thermodynamical analysis, the sludge was treated by using a washing leaching hydrolysis precipitation process. The results show that soluble compounds such as sodium chloride, sodium nitrate and a part of chromium salts can be washed out from the sludge. In the following sulphuric acid leaching process, nickel, cobalt and chromium in the washed sludge can be leached out, but tungsten and molybdenum remain in the leaching residue. Extraction ratio of nickel and cobalt in the leaching process amounts to 98%. The chromium in the leach solution can be removed as chromium hydroxide by using a hydrolysis-precipitation process and the efficiency of chromium removal reaches 94.44%.
Key words: nickel alloy; electromachining sludge; leach
