(1. 廈門理工學(xué)院 材料科學(xué)與工程學(xué)院，廈門 361024；
2. 福州大學(xué) 紫金礦業(yè)學(xué)院，福州 350108)
摘 要: 以銅渣為研究對(duì)象，煤炭作為還原劑，石灰作為活化劑，對(duì)銅渣進(jìn)行高溫熔融還原回收鐵和渣相重構(gòu)活化，研究了不同溫度、煤炭和石灰含量、還原渣粒度對(duì)鐵的回收率和膠凝材料抗壓強(qiáng)度的影響。結(jié)果表明：在銅火法冶煉產(chǎn)生的銅渣溫度范圍內(nèi)，可以滿足銅渣還原回收鐵的要求。石灰和還原劑在還原渣的物相重構(gòu)中起到了關(guān)鍵作用。另外，在溫度為1400 ℃、石灰39 g、煤炭13 g條件下，鐵的回收率達(dá)89.6%，以產(chǎn)生的還原渣制備膠凝材料的抗壓強(qiáng)度28 d時(shí)達(dá)到9.7 MPa。并且還原渣與尾砂調(diào)配制備的新型膠凝材料，其28 d后的抗壓強(qiáng)度均滿足礦山充填的要求。
關(guān)鍵字: 銅渣；還原活化；膠凝材料；抗壓強(qiáng)度
（1.School of Materials Science and Engineering, Xiamen Institute of Technology, Xiamen 361024, China;
2. College of Zijin Mining, Fuzhou University, Fuzhou 350108, China）
Abstract:Copper slag was used as the research object, coal was used as reducing agent, lime was used as activator, and iron was recovered by high temperature smelting reduction, and slag phase reconstruction activation were carried out. The effects of different reduction temperature, reducing agent coal and activator lime on the cementitious strength of reducing slag were studied. The results show that, within the temperature range of copper slag produced by copper pyrometallurgy, it can meet the requirements of iron recovery. Lime and reducing agent play key roles in the phase reconstruction of reducing slag. In addition, under the conditions of 1400 ℃, lime 39 g and coal 13 g, the recovery rate of iron reaches 89.6%, and the compressive strength of the cementitious material produced by the reduction slag used for preparation reaches 9.7 MPa in 28 d. Moreover, the compressive strength of the new cementitious material prepared by mixing reducing slag and tailings after 28 d meets the requirements of mine filling.
Key words: copper slag; reconstruction activation; cementitious material; compressive strength
