(1. 東北大學(xué) 資源與土木工程學(xué)院，沈陽 110819； 2. 內(nèi)蒙古科技大學(xué) 礦業(yè)與煤炭學(xué)院，包頭 014010； 3. CITIC Pacific Mining Management Pty Ltd., 45 St. Georges Terrace, Perth, WA6000, Australia)
摘 要: 在相同的球磨條件下，對4種窄粒級的綠泥石進(jìn)行實(shí)驗(yàn)室分批濕式球磨試驗(yàn)。結(jié)果表明：4種粒級綠泥石的磨礦動力學(xué)都遵循一階磨礦動力學(xué)，球磨0.25~0.5 mm的綠泥石時獲得最大的破碎速率函數(shù)Si=0.35 min-1，正常的破碎粒級范圍應(yīng)該小于0.5 mm；在較短的磨礦時間內(nèi)，0.25~0.5 mm綠泥石的細(xì)粒級產(chǎn)出具有明顯的零階產(chǎn)出特征；采用G-H算法獲得0.25~0.5 mm粒級綠泥石的累積破碎分布函數(shù)Bij，利用磨礦總體平衡動力學(xué)模型，對粒級為0.25~0.5 mm的綠泥石進(jìn)行球磨模擬仿真計算，試驗(yàn)結(jié)果與模擬仿真結(jié)果高度一致。
關(guān)鍵字: 綠泥石；濕式球磨；總體平衡動力學(xué)模型；破碎速率；累積破碎分布函數(shù)
（1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. School of Coal & Mining Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China; 3. CITIC Pacific Mining Management Pty Ltd., 45 St. Georges Terrace, Perth, WA6000, Australia）
Abstract:Under an invariant mill environment, batch wet ball grinding studies were carried out by grinding four mono-sized fractions of single mineral of chlorite. The results show that all mono-sized fractions of chlorite follow the first-order breakage mechanism. The maximum breakage rate for chlorite, obtained in the feed size fraction of 0.25-0.5 mm, is 0.35 min-1. The normal breakage behavior is obtained when the feed size is less than 0.5 mm. The fine fraction output for 0.25-0.5 mm size fractions of chlorite has a clear the zero-order output characteristics at a relatively short grinding time. The cumulative breakage distribution functions for 0.25-0.5 mm size fractions of chlorite are obtained using G-H algorithm. The simulated product size distribution data obtained，using the discrete-size, continuous-time Population Balance Model (PBM), are consistent with experimental data for 0.25-0.5 mm size fractions of chlorite.
Key words: chlorite; wet ball grinding; population balance model; breakage rate; cumulative breakage distribution function
