四川某石英砂除铁降钛提纯新工艺研究 |
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引用本文: | 莫非,孙春宝,邹安华,徐开荣.四川某石英砂除铁降钛提纯新工艺研究[J].矿产保护与利用,2022,42(2):139-143. |
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作者姓名: | 莫非 孙春宝 邹安华 徐开荣 |
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作者单位: | 北京科技大学 土木与资源工程学院,北京100083;重庆渝荣玻璃有限公司,重庆401586 |
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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SiO2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。
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关 键 词: | 石英 提纯 重选 浮选 酸浸 除铁降钛 |
收稿时间: | 2022-03-21 |
Study on a New Purification Process of Quartz Sand in Sichuan Province by Removing Iron and Titanium |
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Affiliation: | 1.School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China2.Chongqing Yurong Glass Co., Ltd, Chongqing 401586, China |
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Abstract: | 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 SiO2 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. |
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