鞍钢矿山超细铁矿全尾砂浆絮凝沉降特性试验

发布时间：2018-05-04 02:18

本文选题：超细全尾砂 + 絮凝剂　；参考：《矿业研究与开发》2017年03期

【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。
[Abstract]:Full tailings filling is the development direction of large iron ore filling mining method. The high efficiency and density technology of ultrafine full tail mortar is the key technology to realize safe and economical mining. Aiming at the filling mining method of Angang iron ore, the experimental study on settlement rate and flocculation concentration mechanism of ultra-fine full-tail mortar was carried out. Through static settling test of full tail mortar and experiment of adding different molecular weight flocculant, the settling rate of full tail mortar with different amount of flocculant was revealed by taking the settling velocity of mortar as evaluation index. The results show that the addition of anionic flocculant with molecular weight of 15 million can adsorb the ultrafine whole tailings particles and accelerate the settling and thickening rate of the whole tail mortar. The optimum concentration of the whole tail mortar flocculant solution in Anshan Iron and Steel Co., Ltd. is determined to be 0.33% 0.35, the corresponding flocculant addition quantity is 95 ~ 115g / t, and the ultimate compression concentration of the bottom flow is 71.12. The mass concentration of the mine design is 65%. The research results provide a theoretical basis for the thick design and engineering application of full tail mortar settlement in subsequent filling mining of Angang Iron Mine.
【作者单位】：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;北京科技大学土木与环境工程学院;金川集团股份有限公司;鞍钢集团矿山设计研究院;
【基金】：国家高技术研究发展计划(863)项目(SS2012AA062405)
【分类号】：TD853.34;TD861.1

【参考文献】