【摘 要】
：
A novel method of pellet calcification roasting-H2SO4 leaching was proposed to efficiently separate and extract vanadium (V) from vanadium-titanium (V-Ti) magne
【机 构】
：
National Engineering Laboratory of Biohydrometallurgy, GRINM Group Corp., Ltd., Beijing 101407, Chin
论文部分内容阅读
A novel method of pellet calcification roasting-H2SO4 leaching was proposed to efficiently separate and extract vanadium (V) from vanadium-titanium (V-Ti) magnetite concentrates. The leaching rate of V is as high as 88.98％, while the leaching rate of impurity iron is only 1.79％. Moreover, the leached pellets can be used as raw materials for blast furnace ironmaking after secondary roasting. X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDS) analyses showed that V3+was oxidized to V5+after roasting at 1200 °C, and V5+was then leached by H2SO4. X-ray diffraction (XRD) analyses and single factor experiment revealed a minimal amount of dis-solved Fe2O3 during H2SO4 leaching. Therefore, a high separation degree of V and iron (Fe) from V-Ti mag-netite concentrate was achieved through H2SO4 leaching. Compared with the traditional roasting-leaching process, this process can achieve a high selectivity of V and Fe, and has excellent prospects for industrial production.
其他文献
介绍了以甘油为原料,经氯化得到二氯丙醇,在Ca(OH)2的作用下皂化反应得到环氧氯丙烷,并将皂化废水蒸发制得CaCl2·2H2O的整个生产过程。通过开拓新思路、创新方法,使整个环氧氯丙烷装置能够稳定并满负荷运行。
2021 Chinaplas中国国际橡塑展上,陶氏公司推出了多款新型材料,以丰富其在亚太区的塑料产品组合。从可回收设计的包装材料、应用于卫材的高性能纤维,到使用改性塑料的道路、具有革命性的跑鞋和人造皮革,再到婴儿床垫和宠物垫,这些创新材料能够为人们生活的方方面面带来更优质的体验。
The study of flow behaviour of water-sand mixtures in fractured rocks is of great necessity to understand the producing mechanism and prevention of water inrush and sand gushing accidents.A self-developed seepage test system is used in this paper to condu
通过技术攻关,探索出影响发生器运行效率的原因和解决方法。系统优化改造后,发生器运行能力大大提升,为完成生产任务打下坚实的基础。
介绍了热氯化法生产四氯乙烯的工艺,分析了急冷塔塔顶的物料组成,提出了采用六氯丁二烯作为吸收剂来吸收分离尾气中有机物、HCl、Cl2等的方案。实际应用情况表明,该办法吸收分离效果良好,运行效率高,费用低,可以为其他相似工况提供实际的借鉴。
通过对氯碱化工企业供配电系统中全密封式电力变压器故障后的运行参数、结构特点以及预防性试验数据等方面进行综合诊断,深入分析了全密封式电力变压器瓦斯保护动作及渗漏油故障的根本原因,并提出了相应的治理措施。
介绍了在烧碱系统螯合树脂塔废水回收方面所做的技术改造,实现了废水的分阶段回收利用,达到了降本增效的目的。
综述了重量法、露点法、电量法、卡尔费休法、气相色谱法等微量水分析技术在乙烯法PVC生产工艺各环节的样品分析中的应用及方法改进。
分析了氯碱焚烧装置在运行过程中存在的主要问题,提出改进措施,确保焚烧装置稳定长周期运行。
针对聚氯乙烯生产工段仪表设备报警设定不合理的情况,进行了综合报警管理,经过治理,大幅降低了报警数量,使报警信息具有较强预测性和指导意义,同时减轻了操作员的负担。