摘要
针对焦家金矿全尾砂处理中絮凝剂单耗高、底流浓度不稳定等问题,通过静态絮凝沉降、动态浓密及半工业深锥浓密试验,系统研究了全尾砂絮凝浓密影响规律及优化工艺。结果表明:静态试验中,阴离子型絮凝剂K739在矿浆浓度12%、添加量15 g/t条件下沉降效果最优,底流浓度显著提升,絮凝剂过量会导致絮团蓬松化并增加沉降阻力;动态试验中,处理量为0.6 t(/m^(2)·h)时,底流浓度达67.66%,溢流水含固量低于200×10-6,延长压缩时间可进一步提高底流浓度;半工业试验验证了处理量与底流浓度的负相关关系,综合考虑溢流水含固量不高于200×10-6,推荐浓密机处理量为0.7 t(/m^(2)·h)。通过优化矿浆浓度、絮凝剂用量及处理量,并增加浓密机高度以延长压缩时间,可实现底流浓度72%以上的稳定控制,为矿山尾砂膏体充填和资源化利用提供了理论与技术支撑。
To address the issues of high unit consumption of flocculant and unstable underflow concentration in the treatment of ungraded tailings at the Jiaojia Gold Mine,a series of static flocculation-settling tests,dynamic thickening tests,and semi‑industrial deep‑cone thickening tests were conducted to systematically investigate the influencing factors and optimize the flocculation-thickening process.Results show that in static tests,the anionic flocculant K739 produced optimal settling performance at a pulp concentration of 12%and a dosage of 15 g/t,significantly improving underflow concentration.However,overdosing led to loose floc structures and increased settling resistance.In dynamic tests,when the treatment rate was 0.6 t(/m^(2)·h),the underflow concentration reached 67.66%,with the overflow solid content below 200×10^(-6).Prolonging the compression time further improved the underflow concentration.Semi‑industrial tests confirmed a negative correlation between treatment rate and underflow concentration.Considering the requirement that overflow solid content should not exceed 200×10^(-6),a recommended thickener throughput of 0.7 t/(m^(2)·h)was proposed.By optimizing slurry concentration,flocculant dosage,and treatment rate,and by increasing thickener height to extend compression time,stable underflow concentrations above 72%can be achieved.This provides both theoretical and technical support for paste backfilling and resource‑based utilization of mine tailings.
作者
何潇亮
肖崇春
蔚登峰
寇云鹏
陈秋松
邱剑辉
He Xiaoliang;Xiao Chongchun;Wei Dengfeng;Kou Yunpeng;Chen Qiusong;Qiu Jianhui(Feiyi Co.,Ltd.;Jiaojia Gold Mine,Shandong Gold Mining(Laizhou)Co.,Ltd.;Backfilling Engineering Laboratory of Shandong Gold Group Co.,Ltd.;School of Resources and Safety Engineering,University of Science and Technology Beijing;School of Resources and Safety Engineering,Central South University)
出处
《黄金》
2025年第8期55-60,共6页
Gold
基金
国家自然科学基金青年项目(52104156)。
关键词
全尾砂
深锥浓密
絮凝沉降
动态浓密
膏体充填
资源化利用
ungradedtailings
deep‑conethickening
flocculationandsettling
dynamicthickening
pastebackfilling
resource‑based utilization
