摘要
为了去除四川某石英砂中的Fe和Ti杂质,提出“重选—浮选—酸浸”的提纯新工艺。石英砂先经重选和浮选进行预选除杂,再经两段酸浸实现精选提纯。重选采用螺旋溜槽一次粗选一次精选去除部分含Fe和Ti重矿物,浮选采用一次粗选一次扫选去除主要含Ti矿物金红石。经选矿除杂后的石英砂在70℃下,经一段盐酸3 mol/L+醋酸1 mol/L+氢氟酸0.5 mol/L、二段盐酸3 mol/L+硫酸1.5 mol/L各酸浸2 h得到最终石英砂精矿。精矿中SiO_(2)含量提高到99.92%;Fe和Ti的含量分别降至0.005%和0.012%,Fe和Ti的综合去除率分别达到91.80%和71.43%。该工艺对四川某石英砂的除铁降钛、深度提纯具有显著效果,对类似石英砂矿石的高效利用具有参考价值。
A new process of“gravity separation-flotation-acid leaching”purification was proposed for the removal of iron and titanium from a quartz sand in Sichuan.Fe and Ti were removed preliminarily from quartz sand by gravity separation and flotation,then purified by two-stage acid leaching.The gravity separation was performed by one roughing-one cleaning two-stage spiral chute to remove Fe and Ti,and the flotation was performed by one roughing-one scavenging to remove rutile mainly containing Ti mineral.Quartz sand was leached firstly with“hydrochloric acid of 3 mol/L+acetic acid of 1 mol/L+hydrofluoric acid of 0.5 mol/L”at 70℃for 2 h,and secondly with“hydrochloric acid of 3 mol/L+sulfuric acid of 1.5 mol/L”to obtain the final concentrate.The content of SiO_(2) increased to 99.92%,Fe and Ti contents decreased to 0.005%and 0.012%respectively,and the removal rate of Fe and Ti reached 91.80%and 71.43%respectively in concentrate.The process has remarkable effect on the removal of iron and titanium in quartz sand,and has reference value for mining and utilization of similar ores.
作者
莫非
孙春宝
邹安华
徐开荣
MO Fei;SUN Chunbao;ZOU Anhua;XU Kairong(School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China;Chongqing Yurong Glass Co.,Ltd, Chongqing 401586, China)
出处
《矿产保护与利用》
2022年第2期139-143,共5页
Conservation and Utilization of Mineral Resources
关键词
石英
提纯
重选
浮选
酸浸
除铁降钛
quartz
purification
gravity separation
flotation
acid leaching
removing iron and titanium