鞍钢矿山超细铁矿全尾砂浆絮凝沉降特性试验  

Experiments on the Flocculation and Settling Characteristics of the Slurry with Extra-fine Iron Total Tailings in Angang Mine

作　　者：李立涛[1,2] 杨志强[1,2,3] 王忠红 高谦[1,2] 刘瑞成[1,2] LI Litao YANG Zhiqiang WANG Zhonghong GAO Qian LIU Ruicheng(Key Laboratory High-efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology of Beijing,Beijing 100083, China School of Civil and Environmental Engineering, University of Science and Technology of Beijing, Beijing 100083,China Jinchuan Group Co., Ltd, Jinchang, Gansu 737100, China Anshan Iron ＆ Steel Group Design ＆ Surveying Institute, Anshan, Liaoning 114002,China)

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [2]北京科技大学土木与环境工程学院,北京100083 [3]金川集团股份有限公司,甘肃金昌市737100 [4]鞍钢集团矿山设计研究院,辽宁鞍山市114002

出　　处：《矿业研究与开发》2017年第3期19-23,共5页Mining Research and Development

基　　金：国家高技术研究发展计划(863)项目(SS2012AA062405)

摘　　要：全尾砂充填是大型铁矿充填采矿法的发展方向,超细全尾砂浆高效浓密技术是实现安全和经济采矿的关键技术。针对鞍钢铁矿充填采矿法,开展超细全尾砂浆沉降速率与絮凝浓密机理试验研究。通过全尾砂浆静态沉降试验和添加不同分子量絮凝剂试验,以砂浆沉降速度为评价指标,揭示不同絮凝剂掺量的全尾砂浆沉降速率。结果表明,添加分子量为1500万的阴离子絮凝剂能够吸附超细全尾砂颗粒,加快全尾砂浆沉降浓密速度。确定了鞍钢铁矿全尾砂浆絮凝剂溶液最优浓度为0.3%~0.35%,相应的絮凝剂添加量为95~115g/t,获得的底流极限压缩浓度为71.12%,达到矿山设计的质量浓度65%。研究成果为鞍钢铁矿嗣后充填法采矿全尾砂浆沉降浓密设计与工程应用提供理论基础。The total tailings filling is the development direction of filling mining method in large iron mine, and the high-efficiency dense technology of extra-fine total tailings is the key to realize safe and economic mining. Aiming at filling mining method of Angang Iron Ore, the experiments on settling velocity and flocculation mechanism of extraExtra-fine total tailings, Flocculant, Settling velocity, Slurry concentrationfine total tailings were carried out. Based on the experiments, taking the settling velocity of slurry as the evaluation index, the settling velocities of total railings slurry under different flocculant amounts were obtained. The results showed that the anionic flocculant with 15 million of molecular weight could absorb the total railings particles and promote the settling velocity. Then, the optimal concentration of flocculant solution for total tailings slurry was determined as 0.3%～0.35%, and the corresponding flocculant amount was 95～115 g/t. Under these two conditions, the limited compression concentration of underflow was 71.12%, and the quality concentration of slurry reached to the designed concentration of 65%. This study provided a theoretical basis for the flocculation and settling design of total tailings slurry and its engineering application on subsequent filling mining in Angang Iron.

关 键 词：超细全尾砂 絮凝剂 沉降速度 浆料浓度 

分 类 号：TD853.34[矿业工程—金属矿开采]