(1. 礦冶科技集團有限公司，北京 102628；
2. 國家金屬礦綠色開采國際聯(lián)合研究中心，北京 102628；
3. 中南大學(xué) 資源與安全工程學(xué)院，長沙 410083)
摘 要: 全尾砂絮凝沉降技術(shù)是礦山充填工藝的核心環(huán)節(jié)。為研究全尾砂靜態(tài)絮凝沉降特性規(guī)律，以進(jìn)料質(zhì)量分?jǐn)?shù)、絮凝劑單耗為影響因素，以固體通量為評價指標(biāo)，采用混合均勻試驗方案，開展全尾砂靜態(tài)絮凝沉降試驗，建立全尾砂絮凝沉降固體通量模型，獲得最優(yōu)匹配參數(shù)。在此基礎(chǔ)上，開展全尾砂動態(tài)絮凝沉降試驗，研究剪切作用和給料速率對底流質(zhì)量分?jǐn)?shù)的影響。結(jié)果表明：固體通量影響因素排序為全尾砂進(jìn)料質(zhì)量分?jǐn)?shù)＞絮凝劑單耗；預(yù)測進(jìn)料質(zhì)量分?jǐn)?shù)為10.6%，絮凝劑單耗為28.5 g/t時，固體通量達(dá)到最大值，為1.498 t/(h·m2)，與實測數(shù)據(jù)誤差僅為1.5%；動態(tài)絮凝沉降可大幅提高底流質(zhì)量分?jǐn)?shù)，最大提高幅度為16.4%，并與進(jìn)料速度呈現(xiàn)負(fù)相關(guān)關(guān)系。
關(guān)鍵字: 全尾砂；絮凝沉降；固體通量；進(jìn)料濃度；絮凝劑單耗；參數(shù)優(yōu)化；混合均勻設(shè)計
（1. BGRIMM Technology Group, Beijing 102628, China;
2. National Centre for International Research on Green Metal Mining, Beijing 102628, China;
3. School of Resources & Safety Engineering, Central South University, Changsha 410083, China）
Abstract:The unclassified tailings flocculation sedimentation technology is the core link of the mine backfilling. In order to study the characteristics of the static flocculation sedimentation of the unclassified tailings, the static flocculation sedimentation tests were conducted. And the solid flux model of the unclassified tailings flocculation sedimentation and the optimal matching parameters were obtained by adopting the mixed uniform test scheme, in which the slurry concentration and the unit consumption of the flocculant were used as the influencing factors, and the solid flux as the evaluation criteria. On this basis, the dynamic flocculation sedimentation test of the unclassified tailings was carried out to study the effect of shearing and feeding rate on the underflow concentration. The results show that the sequence of influencing factors of solid flux is feed concentration > flocculant unit consumption; When the feed concentration is 10.6% and the unit consumption of flocculant is 28.5 g/t, the solid flux reaches the maximum value of 1.498 t/(h·m2), and the measurement error of the measured data is only 1.5%; The dynamic flocculation sedimentation can increase the underflow concentration by 16.4% and has a negative correlation with the feed rate.
Key words: unclassified tailings; flocculation sedimentation; solid flux; slurry concentration; unit consumption of flocculants; parameters optimization; mixed uniform design
