Optimization of tungsten leaching from low manganese wolframite concentrate using Response Surface Methodology (RSM)

Bohlouli, A.; Afshar, M. Reza; Aboutalebi, M.R.; Seyedein, S.H.

doi:10.1016/j.ijrmhm.2016.07.012

Cited by 29 publications

(10 citation statements)

References 14 publications

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“…Response surface methodology (RSM) was used for the process optimization with a minimum number of experiments as well as analyzing the interaction between the factors [26][27][28]. Based on the previous work we have made, four major factors: CaF 2 dosage (wt %), H 2 SO 4 concentration (vol %), leaching time (min) and microwave power (W) were chosen as the independent variables because of the apparent affection on the V leaching.…”

Section: Experimental Designmentioning

confidence: 99%

Evaluation of Microwave Intensified Vanadium Bearing-High Carbonaceous Shale Acid Extraction Process

et al. 2018

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Abstract:The microwave assisted leaching of the vanadium bearing-high carbonaceous shale process was investigated using surface response methodology (RSM) based on Box-Behnken design (BBD). The effect of important factors such as CaF 2 usage, H 2 SO 4 concentration, leaching time and microwave power, as well as the interactive coefficients, the signification of the model and factors were analyzed. With the condition of 9.8 wt % CaF 2 , 23.0 vol % H 2 SO 4 , 170.6 min and 350 W, the actual values of vanadium (V) leaching efficiency in microwave heating (MH) and conventional heating (CH) were 85.43% and 79.64%, which agreed well with the predicted values. Meanwhile, the influence order of the factors in MH and CH was CaF 2 dosage > H 2 SO 4 concentration > leaching time. Microwave was an efficacious impetus for V extraction, but the microwave power itself was not a significant factor when the temperature of leaching system was high enough. The further characterization of mineral components before and after leaching confirmed that the prior dissolving of muscovite and pyrite in MH was intensified, while both minerals were in fine grains and filled with black carbon. The selective heating of carbon and pyrite sequenced the large temperature gradient between solids and liquids, which accelerated the dissolving reaction of muscovite with CaF 2 present in MH condition.

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Section: Experimental Designmentioning

confidence: 99%

Evaluation of Microwave Intensified Vanadium Bearing-High Carbonaceous Shale Acid Extraction Process

et al. 2018

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“…This method is a widely used multifarious process for optimizations because of few experimental runs. [19][20][21] RSM includes first-, second-, and third-order models and two-factor interaction models. The RSM model proposes that the response (Y) is expressed as Equation 2 when all interactions are covered.…”

Section: Rsmmentioning

confidence: 99%

Optimization of purification treatment of spent cathode carbon from aluminum electrolysis using response surface methodology (RSM)

Yuan

Xiao

Tian

et al. 2017

Asia-Pacific J Chem Eng

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Purification treatment and carbon recovery of the spent cathode carbon (SCC) from aluminum electrolysis were optimized using response surface methodology (RSM) in caustic leaching process and purified further by acid leaching. The purity of treated SCC was 96.43%. A Box-Behnken design based on a single-factor experiment was utilized to model 3 independent variables, namely, temperature (55-85°C), time (70-110 min), and initial alkali-material ratio (0.15-0.35), to investigate their responses to the carbon content of caustic leaching residue. A multivariate quadratic regression equation model was established according to RSM principles. Results revealed that the carbon content of caustic leaching residue was significantly influenced by the initial alkali-material ratio, temperature, and time, sorted from big to small. Interactions of any 2 of the 3 factors significantly affected the response. RSM is thus successfully applied in the optimization of the SCC impurities removal process.

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“…The effects of leaching temperature, NaOH solution concentration, mineral particle size, liquid/solid ratio, and stirring speed are significant to both the digestion of scheelite by NaOH and the leaching rate [5,10,24]. These effects have been investigated in various studies using different statistical and graphical techniques [23,25], and in this study, this approach was also taken.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical Treatment of Historical Tungsten Tailings: Leaching While Grinding for Tungsten Extraction Using NaOH

2021

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Innovative tungsten (W) extraction techniques are continually being sought because of challenges of low leaching efficiencies, despite using advanced processing units such as autoclaves operating high temperatures and pressures. Compared to conventional leaching, mechanochemical treatment improves the efficiency of leaching. Therefore, in this study, an innovative mechanochemical treatment method, referred to as leaching while grinding (LWG), was employed as a reprocessing option to optimize W recovery from historical tungsten tailings. Experiments were run using the regular two-level factorial design to screen through the four factors of stirrer speed, liquid/solid ratio, temperature, and digestion time to assess their criticality and effects in the LWG process. The stirrer speed and the liquid/solid ratio were the most critical factors in the optimization of W recovery. The maximum W recovery (91.2%) was attained at the highest stirrer speed (410 rpm), low liquid/solid ratio (0.8), long digestion time (6 h), and low leaching temperature (60 °C). The attained low leaching temperature (60 °C) was due to the mechanical activation of scheelite resulting from the simultaneous grinding and leaching. For such low- grade W material, liquid/solid ratio optimizing is critical for maintaining the digestion mixture fluidity, and for environmental and economic sustainability regarding the sodium hydroxide (NaOH) consumption, which was low.

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Optimization of tungsten leaching from low manganese wolframite concentrate using Response Surface Methodology (RSM)

Cited by 29 publications

References 14 publications

Evaluation of Microwave Intensified Vanadium Bearing-High Carbonaceous Shale Acid Extraction Process

Evaluation of Microwave Intensified Vanadium Bearing-High Carbonaceous Shale Acid Extraction Process

Optimization of purification treatment of spent cathode carbon from aluminum electrolysis using response surface methodology (RSM)

Mechanochemical Treatment of Historical Tungsten Tailings: Leaching While Grinding for Tungsten Extraction Using NaOH

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