摘要
为了提高锰铁矿石回收率,在回收过程中需要消耗大量水资源对矿石进行洗选,洗矿产生的废弃泥浆水如何处理成为企业难题。同时,选矿厂位于喀斯特地貌区,使得企业取水用水困难,在旱季严重影响选矿效率。本工作针对以上难题,以提高资源的循环利用率和节约企业生产成本为目标。根据泥浆水成分开展絮凝剂优选实验,采用对比分析法,优选出适合锰铁矿泥水分离的絮凝剂组合类型与配制浓度,再利用控制变量法优化絮凝剂用量。对絮凝剂沉降原理进行分析,发现APAM对含碱性粒子的锰铁矿泥水分离具有更好的沉降效果,优先加入阴离子絮凝剂进行电中和,破坏颗粒间的稳定状态,混凝剂(3-3)的加入利于发挥架桥作用,并通过液体扰动,增加颗粒之间碰撞概率,实现网捕和卷扫作用。实验结果表明,当进料浓度为20%、絮凝剂浓度为2‰时,阴离子聚丙烯酰胺(APAM)与高分子混凝剂(3-3)复合使用效果优于单独使用其中任何一种。在ω(APAM)∶ω(3-3)=1∶2条件下,絮凝沉降效果最佳。经过沉降和过滤后,分离出的水资源可有效利用于上游循环洗矿,而不会对矿石产生不利影响,从而显著提高选矿效率。这种方法还为企业节省了大量成本,并且无需建造尾矿库。
In order to improve the recovery rate of manganese iron ore,a large amount of water resources need to be consumed in the recovery process to wash the ore.How to deal with the waste mud water from washing minerals has become a difficult problem for enterprises.At the same time,the mine is located in the karst landform area,which makes it difficult for enterprises to take water and use water,which seriously affects the efficiency of mineral processing in the dry season.In view of the above problems,this work aims to improve the recycling rate of resources and save the production cost of enterprises.According to the composition of slurry water,the flocculant optimization experiment was carried out.The flocculant combination type and configuration concentration suitable for the separation of manganese iron ore slurry were optimized by comparative analysis,and then the flocculant dosage was optimized by control variable method.The principle of flocculant sedimentation was analyzed.It was found that APAM had better sedimentation effect on the separation of manganese iron ore slurry containing alkaline particles.Anionic flocculants were preferentially added for electrical neutralization to destroy the stable state between particles.The addition of coagulant(3-3)was beneficial to play a bridging role,and through liquid disturbance,the collision probability between particles was increased to achieve net capture and sweep effect.The experimental results show that when the feed concentration is 20%and the flocculant concentration is 2‰,the combined use of anionic polyacrylamide(APAM)and polymer coagulant(3-3)is better than any of them alone.Under the condition ofω(APAM)∶ω(3-3)=1∶2,the flocculation sedimentation effect is the best.After sedimentation and filtration,the separated water resources can be effectively used in the upstream circulating ore washing without adverse effects on the ore,thus significantly improving the efficiency of mineral processing.This method also saves a lot of costs for the enterprise,and does not need to build a tailings reservoir.
作者
徐兴卫
李国芳
徐兴爱
吕鹏
XU Xingwei;LI Guofang;XU Xing ai;LYU Peng(School of Construction Engineering,Kunming Metallurgical College,Kunming 650033,China;Yunnan Senbo Concrete Admixture Co.,Ltd.,Kunming 650033,China;Yunnan Qiaoxiao Slag Technology Co.,Ltd.,Kunming 650033,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第S01期598-603,共6页
Materials Reports
基金
云南省技术委托开发重点项目(2023530101000771)
云南省教育厅科学研究基金项目(2019j0892)
云南省教育厅科学研究基金项目(2021J0948)
昆明冶金高等专科学校重大科研项目(2023HX014)
昆明冶金高等专科学校科研项目(2023HX009)
昆明冶金高等专科学校科研基金创新团队项目(XJKJCXTD202108)。
关键词
选矿工程
资源循环利用
泥水分离
锰铁矿泥浆
絮凝剂
beneficiation engineering
resource recycling
sludge-water separation
manganese iron ore slurry
flocculant
