【摘要】：提出并研究鹽酸浸出-鐵粉置換-硫化沉淀-噴霧熱解綜合利用窯渣鐵精礦的新工藝。結(jié)果表明:當鹽酸濃度為6 mol/L,浸出溫度為60℃時,Ag、Pb、Cu、Fe和Zn的浸出率分別達到99.95%、99.34%、95.07%、89.44%和57.92%。所得鹽酸浸出液中加入理論量1.25倍的鐵粉,Cu和Ag的脫除率均可達到98%以上。當硫化亞鐵用量為理論量的3倍時,鐵粉置換后液中Pb、Zn的脫除率可達96%以上,凈化后液中雜質(zhì)總量低于500 mg/L。以硫化沉淀后的液體為原料進行噴霧熱解,在溫度高于700℃時,可制得平均粒度(D50)為12μm、純度99%的類球形Fe_2O_3粉末。利用這一工藝,不僅可高效回收窯渣鐵精礦中的有價金屬,還可將鐵資源轉(zhuǎn)化為具有較高附加值的氧化鐵產(chǎn)品,從而實現(xiàn)窯渣鐵精礦的綜合利用。
[Abstract]:A new process of comprehensive utilization of iron concentrate from kiln slag by hydrochloric acid leaching, iron powder replacement, sulphide precipitation and spray pyrolysis was proposed and studied. The results showed that when the concentration of HCl was 6 mol/L, and the temperature was 60 鈩，

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