(1. 東北大學(xué) 資源與土木工程學(xué)院，沈陽 110819；
2. 北京礦冶研究總院，北京 100044)
摘 要: 采用強(qiáng)化分散直接反浮選技術(shù)，以碳酸鈉和水玻璃為分散劑，強(qiáng)化礦漿分散，以削弱碳酸鐵對浮選的影響，同時從藥劑用量等方面系統(tǒng)研究適宜礦石的最佳浮選工藝條件，并采用SEM、XRD和EDS等手段對原礦、精礦和尾礦的形貌及礦物組成進(jìn)行表征。結(jié)果表明：給礦樣粒度較細(xì)時，容易造成細(xì)顆粒的非選擇性聚團(tuán)以及細(xì)粒顆粒在粗顆粒上罩蓋，添加碳酸鈉和水玻璃能夠強(qiáng)化礦漿分散，有利于含碳酸鹽難選赤鐵礦石磁選精礦的浮選分離；在最佳藥劑制度下，通過一粗兩精兩掃、中礦順序返回的閉路流程能夠獲得Fe品位為66.20%，回收率為71.52%的鐵精礦。
關(guān)鍵字: 含碳酸鹽赤鐵礦石；磁選精礦；分散；碳酸鈉；水玻璃；罩蓋
（1. College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China;
2. Beijing General Research Institute of Mining and Metallurgy, Beijing 100044, China）
Abstract:Based on the investigation of ore properties, a flotation separation technology of hematite magnetic separation concentrate containing iron carbonate was developed with enhanced dispersion by adding sodium carbonate and sodium silicate to eliminate the negative impact of iron carbonate on flotation. The optimum flotation conditions were studied systematically. The structure and mineral composition of raw ore, concentrate and tailings were discussed by means of SEM, XRD and EDS. The results show that in the fine-grained sample, the fine grains are prone to agglomerate each other and cover on the coarse grains. Adding sodium carbonate and sodium silicate can enhance pulp dispersion, which benefits the selective separation of magnetic separation concentrate containing iron carbonate. An iron concentrate with Fe grade of 66.20% and Fe recovery of 71.52% can be obtained on optimum reagent condition through one rougher-two cleanings-two scavenges closed-circuit flowsheet.
Key words: refractory hematite containing carbonate; magnetic separation concentrate; dispersing; sodium carbonate; sodium silicate; covering
