scholarly journals Mechanism of Novel K2SO4/KCl Composite Roasting Additive for Strengthening Vanadium Extraction from Vanadium–Titanium Magnetite Concentrate

Minerals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 426
Author(s):  
Renmin Li ◽  
Tao Liu ◽  
Yimin Zhang ◽  
Jing Huang
Keyword(s):  
Sulfuric Acid Concentration ◽  
X Ray Diffraction ◽  
Volume Percentage ◽  
Solid Ratio ◽  
Vanadium Extraction ◽  
Magnetite Concentrate ◽  
Main Decomposition ◽  
Vanadium Titanium ◽  
Hematite Fe2o3 ◽  
Titanium Magnetite

In this paper, a novel K2SO4/KCl composite roasting additive was used to extract vanadium from vanadium–titanium magnetite concentrate. Further, the mechanism of K2SO4/KCl for extracting vanadium was studied. The results indicate that the vanadium leaching efficiency reached 82.04%, an increase of 7.43% compared to that of single K2SO4 and 10.05% compared to single KCl under the following conditions: a total dosage of K2SO4/KCl of 7 wt % with a mass ratio of 6/4, a roasting temperature of 950 °C, a roasting time of 1 h, a leaching temperature of 95 °C, a sulfuric acid concentration of 10% (v/v: volume percentage), and a leaching time of 1.5 h with a liquid-to-solid ratio of 3 mL/g. Moreover, crystal chemistry analyses indicated that the essence of the vanadium extraction with roasting was the conversion of cubic crystal systemic vanadium-bearing magnetite (FeO(Fe,V)2O3) to trigonal crystal systemic hematite (α-Fe2O3), and as most Fe(V)–O bonds were broken with the reconstructed conversion, the dissociation of V(III) occurred. Furthermore, the main decomposition products of K2SO4/KCl were K2O, SO2, and Cl2. X-ray diffraction (XRD) and related SEM-EDS analyses indicated that there were mainly three aspects in the mechanism of K2SO4/KCl for extracting vanadium. Firstly, activated K2O could combine with vanadium to generate soluble KVO3 rather insoluble Ca(VO3)2; secondly, SO2 could react with CaO to form CaSO4 to prevent the generation of acid-consuming Ca(VO3)2, which was beneficial to the dissolution of vanadium-bearing sphene (Ca(Ti,V)SiO4O); thirdly, Cl2 could destroy the structure of hematite (Fe2O3) to reduce its wrapping extent to KVO3.

scholarly journals Efficient Extraction of Vanadium from Vanadium–Titanium Magnetite Concentrate by Potassium Salt Roasting Additives

Minerals ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 25 ◽  
Author(s):  
Renmin Li ◽  
Tao Liu ◽  
Yimin Zhang ◽  
Jing Huang ◽  
Chengbao Xu
Keyword(s):  
Potassium Salt ◽  
Magnetite Concentrate ◽  
Efficient Extraction ◽  
Vanadium Titanium ◽  
Titanium Magnetite

scholarly journals A New Process of Extracting Titanium from Vanadium–Titanium Magnetite

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 327
Author(s):  
Yandong Li ◽  
Shuangyin Chen ◽  
Huamei Duan
Keyword(s):  
Recovery Rate ◽  
Acid Leaching ◽  
Leaching Rate ◽  
Optimum Conditions ◽  
Solid Ratio ◽  
New Process ◽  
Leaching Experiments ◽  
Panxi Area ◽  
Vanadium Titanium ◽  
Titanium Magnetite

A new process of extracting titanium from vanadium–titanium magnetite (VTM) in the Panxi area in Sichuan, China is introduced in this work. Various experiments, including reduction–magnetic separation, leaching and hydrolyzing experiments, are carried out. The results show that the optimum conditions for leaching experiments are an acid/slag ratio of 4:1, a leaching temperature of 60 °C, a leaching time of 80 min, and a liquid/solid ratio of 3.2:1. The leaching rate of titanium in Ti-bearing slag is 92.41%. The optimum conditions for hydrolyzing experiments are an H+ concentration of 0.75 g·L−1, hydrolyzing temperature of 100 °C, and hydrolyzing time of 180 min, and the hydrolyzing rate of titanium in acid leaching liquor is 96.80%. After the leaching and hydrolyzing experiments, the recovery rate of titanium from the Ti-bearing slag is 89.45%.

Investigation on Efficient Vanadium Extraction from Vanadium-Bearing Molten Iron

2013 ◽  
Vol 785-786 ◽  
pp. 58-62 ◽  
Author(s):  
Xiang Hai Liu ◽  
Deng Fu Chen ◽  
Yuan Kun Li ◽  
Mu Jun Long ◽  
He Lin Fan ◽  
...  
Keyword(s):  
Molten Iron ◽  
Smelting Process ◽  
Oxygen Lance ◽  
Point Temperature ◽  
Vanadium Extraction ◽  
Significant Process ◽  
Vanadium Titanium ◽  
End Point Temperature ◽  
Additional Value ◽  
Titanium Magnetite

Vanadium extration is a significant process to improve the additional value of vanadium-bearing molten iron. This article carried out the experiments of blowing oxygen and smelting on V extration from vanadium-bearing molten iron, which is made from vanadium titanium magnetite by the process of non-blast furnace. The different controlling parameters including the reaction time, temperature and inserting depths of oxygen lance, are studied aiming to increase the rate of V extraction. The thermodynamics calculation is performed during the process. The results show that, the appropriate blowing time is 9 mins, and the end-point temperature of molten pool should be ranged of 1360-1395 °C. Moreover, the larger inserting depth is beneficial to the V extraction. The oxidation patterns of the smelting process are discussed.

Studies of Mineralogical Characteristics on Vanadium Titanium Magnetite in Hongge Area, Panzhihua, Sichuan, China

2013 ◽  
Vol 813 ◽  
pp. 292-297 ◽  
Author(s):  
Jin Hua Luo ◽  
Ke Hui Qiu ◽  
Yu Chong Qiu ◽  
Pei Cong Zhang
Keyword(s):  
Mining Area ◽  
Optical Microscope ◽  
Major Elements ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mineralogical Characteristics ◽  
Study Results ◽  
Vanadium Titanium ◽  
Micro Analysis ◽  
Titanium Magnetite

The composition, the texture and structure, the mineralogical characteristics of major minerals, the main occurrences of major elements and the distribution rules of vanadium titanium magnetite of Hongge area, Panzhihua, Sichuan Province of China, were studied in details by the methods of chemical multi-elements analysis, optical microscope, scanning electron microscope (SEM), electron probe micro-analysis (EPMA), X-ray diffraction (XRD) and X-ray fluorescence (XRF). The study results provide references to the vanadium titanium magnetite beneficiation process of this mining area.

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