(1. 北京科技大學(xué) 冶金與生態(tài)工程學(xué)院，北京 100083； 2. 內(nèi)蒙古科技大學(xué) 材料與冶金學(xué)院，包頭 014010)
摘 要: 采用高溫火法二次富集工藝對(duì)含鍺粉煤灰中的鍺進(jìn)行富集，以鍺含量為0.35%(質(zhì)量分?jǐn)?shù))的粉煤灰為原料，研究溫度、C含量、堿度、保溫時(shí)間等工藝參數(shù)，對(duì)高溫火法二次富集工藝鍺的富集的影響。結(jié)果表明：當(dāng)粉煤灰中碳含量為3%，堿度為1.0，在1600 ℃下保溫1 h可以取得較好的鍺富集效果。富集物中鍺含量可達(dá)到16.65%，富集物中鍺的收得率達(dá)到89.55%。對(duì)富集后的富集物和渣進(jìn)行XRD物相分析，富集后鍺以鍺酸鹽(Ca2GeO4和Ca2Ge7O16)和FeGe形式在富集物中存在，渣呈玻璃相，有利于鍺的提取。
關(guān)鍵字: 高溫；鍺；富集；粉煤灰
（1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Material and Metallurgy School, Inner Mongolia University of Science and Technology, Baotou 014010, China）
Abstract:The enrichment of germanium from the ash was adopted by new method of second enrichment technology at high temperature in this experiment. The ash with 0.35% germanium was used as raw material. Effects of the parameters, such as temperature, C content, basicity and soaking time, on second enrichment of germanium were investigated. The results show that the effect of germanium enrichment is better when the carbon content is 3% in the ash, the basicity is 1, and it is insulated for 1 h at 1600 ℃. The germanium content in the enrichment is 16.65%, and the yield rate of the germanium is 89.55%. The enrichment and slag were analyzed by X-ray diffraction (XRD), the results show that the germanium in the enrichment exists as germanates and FeGe, and the slags exists as glass phase, which is propitious to the extraction of germanium.
Key words: high temperature; germanium; enrichment; coal ash
