scholarly journals New Insights into the Penetration Depth of Sulfuric Acid and Leaching Effect in the Sulfuric Acid Curing-Leaching Process of Vanadium-Bearing Stone Coal

ACS Omega ◽  
2021 ◽  
Author(s):  
Hui Li ◽  
Yuexin Han ◽  
Jianping Jin ◽  
Zhenya Zhou
Keyword(s):  
Sulfuric Acid ◽  
Penetration Depth ◽  
Stone Coal ◽  
Leaching Process

Direct Acid Leaching of Vanadium from Stone Coal

2017 ◽  
Vol 36 (9) ◽  
pp. 877-883 ◽  
Author(s):  
Bo Zhang ◽  
Zhaoguo Gao ◽  
Hongzhao Liu ◽  
Wei Wang ◽  
Yaohua Cao
Keyword(s):  
Sulfuric Acid ◽  
Acid Leaching ◽  
Influential Factors ◽  
Process Conditions ◽  
Stone Coal ◽  
Leaching Process ◽  
Maximum Value ◽  
Orthogonal Experiments ◽  
Counter Current ◽  
Leaching Efficiency

AbstractThis paper focused on optimizing the process conditions of direct acid leaching process to enhance the leaching efficiency of leaching vanadium from the stone coal. Orthogonal experiments and single factor experiments were conducted to investigate the effect of the influential factors of direct acid leaching on vanadium leaching ratio. The results showed that the vanadium leaching ratio reached the maximum value of 89.22 % under the optimal process conditions of CaF2 dosage 5 mass%, H2SO4 dosage 40 mass%, leaching temperature 95 °C and leaching time 10 h. Furthermore, the reaction mechanisms of the main influencing factors were analyzed. Finally, the two-stage counter-current leaching process was adopted to decrease the consumption of sulfuric acid and neutralizer, and the results indicated that the consumption of sulfuric acid decreased 12.50 % as well as neutralizer decreased 35.80 %.

scholarly journals Study on Ultrasonically-Enhanced Sulfuric Acid Leaching of Nickel from Nickel-Containing Residue

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 810
Author(s):  
Zhanyong Guo ◽  
Ping Guo ◽  
Guang Su ◽  
Fachuang Li
Keyword(s):  
Sulfuric Acid ◽  
Acid Leaching ◽  
Ultrasonic Waves ◽  
Sulfuric Acid Leaching ◽  
Solid Product ◽  
Leaching Process ◽  
Diffusion Controlled ◽  
Extraction Degree ◽  
Ultrasonic Conditions ◽  
Complex Nickel

In this paper, nickel-containing residue, a typical solid waste produced in the battery production process, was used to study the cavitation characteristics of ultrasonic waves in a liquid–solid reaction. The ultrasonically-enhanced leaching technology for multicomponent and complex nickel-containing residue was studied through systematic ultrasonic-conventional comparative experiments. An ultrasonic leaching kinetics model was established which provided reliable technological guidance and basic theory for the comprehensive utilization of nickel-containing residue. In the study, it was found that ultrasonically-enhanced leaching for 40 min obtained the same result as conventional leaching for 80 min, and the Ni extraction degree reached more than 95%. According to the kinetic fitting of the leaching process, it was found that the sulfuric acid leaching process belonged to the diffusion-controlled model of solid product layers under conventional and ultrasonic conditions, and the activation energy of the reaction was Ea1 = 17.74 kJ/mol and Ea2 = 5.04 kJ/mol, respectively.

Microwave-Assisted Leaching Vanadium from Stone Coal

2011 ◽  
Vol 189-193 ◽  
pp. 3916-3919 ◽  
Author(s):  
Hong Zhou Ma ◽  
Xin Zhe Lan ◽  
Yao Ning Wang ◽  
Yu Hong Tian
Keyword(s):  
Sulfuric Acid ◽  
Microwave Power ◽  
Orthogonal Design ◽  
Chemical Constituents ◽  
Influence Factors ◽  
Sulfate Solution ◽  
Leaching Rate ◽  
Stone Coal ◽  
Microwave Assisted ◽  
Design Experiments

Technological process of microwave-assisted leaching of vanadium with sulfate solution has been defined on the base of phase and chemical constituents of stone coal. The influence factors such as content of sulfuric acid, microwave power, and leaching time were studied on leaching rate of vanadium from the stone coal. One element experiments and orthogonal design experiments are carried out to achieve optimized parameters. The experimental results showed that the leaching rate of vanadium was improved by the change of influence factors at some range. The single leaching rate of vanadium reached 80.9% under the optimal conditions of sulfuric acid content of 12%, microwave power 539w,leaching time of 2h.

Leaching vanadium by high concentration sulfuric acid from stone coal

2010 ◽  
Vol 20 ◽  
pp. s123-s126 ◽  
Author(s):  
Xiang-yang CHEN ◽  
Xin-zhe LAN ◽  
Qiu-li ZHANG ◽  
Hong-zhou MA ◽  
Jun ZHOU
Keyword(s):  
Sulfuric Acid ◽  
High Concentration ◽  
Stone Coal

Behavior of lead and selenium during leaching of slurry by solution of trylon B at sulfuric acid workshop of Balkhsh copper production plant

2021 ◽  
Vol 22 (1) ◽  
pp. 21-29
Author(s):  
K. A. Linnik ◽  
◽  
A. S. Sharipova ◽  
A. N. Zagorodnyaya ◽  
S. T. Akchulakova
Keyword(s):  
Sulfuric Acid ◽  
Ethylenediaminetetraacetic Acid ◽  
Copper Production ◽  
Production Plant ◽  
Leaching Process

The results of experiments for the study of behavior of lead and selenium during the leaching process of slurry by a solution of trylon B depending on parameters typical for hydrometallurgical processes and their ranges are presented. It has been found out that trylon B practically completely extracts lead into the solution, selenium is concentrated in cake. However, the process is accompanied by precipitation of ethylenediaminetetraacetic acid (C10H16N2O8). Selenium-containing substances were determined in slurry and cakes.

scholarly journals An Alternative Process for Leaching Chalcopyrite Concentrate in Nitrate-Acid-Seawater Media with Oxidant Recovery

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 518 ◽  
Author(s):  
César I. Castellón ◽  
Pía C. Hernández ◽  
Lilian Velásquez-Yévenes ◽  
María E. Taboada
Keyword(s):  
Particle Size ◽  
Sulfuric Acid ◽  
Alkaline Solution ◽  
Sodium Nitrite ◽  
Sodium Nitrate ◽  
Room Temperature ◽  
Leaching Test ◽  
Copper Concentrate ◽  
Leaching Process ◽  
Chalcopyrite Concentrate

An alternative copper concentrate leaching process using sodium nitrate and sulfuric acid diluted in seawater followed by gas scrubbing to recover the sodium nitrate has been evaluated. The work involved leaching test carried out under various condition by varying temperature, leaching time, particle size, and concentrations of NaNO3 and H2SO4. The amount of copper extracted from the chalcopyrite concentrate leached with seawater, 0.5 M of H2SO4 and 0.5 M of NaNO3 increased from 78% at room temperature to 91% at 45 °C in 96 h and 46 h of leaching, respectively. Gas scrubbing with the alkaline solution of NaOH was explored to recover part of the sodium nitrate. The dissolved salts were recovered by evaporation as sodium nitrate and sodium nitrite crystals.

Experimental Study on Sulfuric Acid Leaching Behavior of Chromite with Different Temperature

2011 ◽  
Vol 361-363 ◽  
pp. 628-631 ◽  
Author(s):  
Cheng Jun Liu ◽  
Jie Qi ◽  
Mao Fa Jiang
Keyword(s):  
Sulfuric Acid ◽  
Acid Leaching ◽  
Raw Material ◽  
Leaching Rate ◽  
Sulfuric Acid Leaching ◽  
Leaching Process ◽  
Pollution Problem ◽  
Environmental Pollution Problem ◽  
Leaching Solution ◽  
Leaching Residue

Utilizing Pakistan chromite as raw material, the rapid leaching of chromium and iron could be realized by the sulfuric acid leaching process on the condition of atmospheric pressure and the addition of oxidant A. And the leaching rate of chromium and iron would be 98.5% and 71.9%, respectively. The sulfuric acid leaching processes with different temperature were systematically studied by chemical analysis and phase analysis. The results showed that, with the increase of reaction temperature, the leaching rate of chromium would increase gradually, but the leaching rate of iron increased at first and then decreases and reached its maximum at 140°C. When the temperature > 160°C, the phases of the leaching residue were magnesium iron silicate and a few of silica, no chromohercynite, chrompicotite and magnesioferrite existed in the chromite. The leaching solution of sulfuric acid leaching process could be used for preparing the basic chrome sulfate, and there is no Cr6+ in the leaching residue and solution. The results would provide theoretical guidance for solving environmental pollution problem of Cr6+ in traditional chromate production process.

Efficiency and sustainable leaching process of manganese from pyrolusite-pyrite mixture in sulfuric acid systems enhanced by microwave heating

2020 ◽  
Vol 198 ◽  
pp. 105519
Author(s):  
Shunda Lin ◽  
Lei Gao ◽  
Yong Yang ◽  
Jin Chen ◽  
Shenghui Guo ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Microwave Heating ◽  
Leaching Process

Kinetics Leaching Process of Uranium Ions from El-Erediya Rock by Sulfuric Acid Solution

2016 ◽  
Vol 6 (0) ◽  
pp. 35 ◽  
Author(s):  
Yasser Khawassek ◽  
Ahmed Eliwa ◽  
Elsayed Haggag ◽  
Saad Mohamed ◽  
Sayed Omar
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Leaching Process ◽  
Uranium Ions

Experimental Study on Extraction of Vanadium from Contained Vanadium Solution

2010 ◽  
Vol 160-162 ◽  
pp. 815-820
Author(s):  
Xiang Yang Chen ◽  
Xin Zhe Lan ◽  
Yong Hui Song ◽  
Shuang Ping Yang
Keyword(s):  
Sulfuric Acid ◽  
Organic Phase ◽  
Extraction Ratio ◽  
Extraction Time ◽  
Phase Ratio ◽  
Shaanxi Province ◽  
Extraction Capacity ◽  
Stone Coal ◽  
Technical Parameters ◽  
Development Direction

Vanadium is an important alloying elements and structural materials, a large part of vanadium was extracted from stone coal. The resources of stone coal are very rich in China. It's an important development direction to extract vanadium in stone coal. The stone coal in Shaanxi Province Shanyang County has been studied. Vanadium was extracted by HDEHP in this experiment, which is in the sulfuric acid solution leaching system. The paper researched the influence of concentration of di(2-ethylhexyl) phosphate (HDEHP), pH, the extraction time, the extraction stages, the phase ratio for the extraction ratio of vanadium, the extraction capacity of organic phase and the extraction isotherm. The best technical parameters: 20% di(2-ethylhexyl) phosphate (HDEHP), TBP 5%, sulfonated kerosene 75%(volume concentration), pH=2.5, phase ratio Vo:Va=1:5 and the extraction time is 5 min, extraction of 5 stages level. The extraction ratio of vanadium is 98.57% from the solution of 2.9658 mg/ml vanadium in that technical parameter. The best stripping of vanadium process parameters: the stripping agent for 1 mol/l of sulfuric acid, phase ratio Vo: Va = 5:1, the stripping time is 5 min, the stripping of three stages. Under this condition we may strip loaded organic phase which contain the vanadium 9.0266 mg/ml, the stripping rate is 99.73%.

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