Carbonization leaching of scandium from red mud with preliminary pulp gassing by carbonic acid

Медведев, А. С.; Kirov, S. S.; Khayrullina, R. T.; Suss, A. G.

doi:10.17580/tsm.2016.06.09

Cited by 4 publications

(6 citation statements)

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“…( ) Inequation (26) from the known parameters of the mining complex and pulp preparation system enables to assess the critical pipeline diameter. The actual pipeline diameter is selected from the pipes assortment like the closest diameter smaller than the critical value.…”

Section: Figure 7 Approximation Of the Dependence Of Value B On Kmentioning

confidence: 99%

“…The bunker technologies of pulp preparation are considered the most acceptable for these conditions, since they involve the process of mixing the liquid and solid phases of the pulp in a certain tank, which ensures the associated suspension thickening and the introduction of reagents into it [23]- [26]. For low and mean-concentrated hydraulic mixtures, the finished pulp density control in this type of devices is ensured by selecting the volumetric flowrate of phases, and the uniformity of mixing is provided by ways of their supply.…”

Section: Introductionmentioning

confidence: 99%

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Parameters determination of hydromechanization technologies for the dumps development as technogenic deposits

Blyuss¹,

Semenenko²,

Medvedieva³

et al. 2020

Min. miner. depos.

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Purpose. Determination and substantiation of the hydromechanization technologies parameters and the hydraulic transport operation modes for mining the technogenic deposits formed as a result of the enrichment waste storing in tailing dumps of mining and processing enterprises. Methods. A comprehensive multi-stage analytical approach has been used in a paper when performing research. Initially, in order to substantiate the hydromechanization technologies parameters, the parameters of the pulp-preparation unit have been analytically determined in this paper, which are limited by the value of the upper dam edge, taking into account the types of hydraulic mixture. At the second stage, dependences have been set for calculating the critical velocity of hydraulic transporting the pulps with different concentration (low, mean, and high). The next research stage was to determine the head and rate specification (HRS) of the hydrotransport pipeline and the required capacity of the hydraulic mixture, which will enable substantiating the parameters for the corresponding mining complex in the technogenic deposits development. Findings. A critical pipeline diameter has been set with the prescribed parameters of the mining complex and the adopted pulp preparation system. Dependences have been found for calculating the critical velocity of hydraulic transportation of mean-and highly-concentrated pulps. The head and rate specifications have been determined of the tailing hydrotransport pipeline. Originality. For the first time it has been revealed that the critical diameter value is determined by the product of two termsthe first one takes into account the effect of the mining complex productivity, and the secondthe dependence on the pulp preparation system parameters. This makes possible to control the parameters and modes of hydromechanization technologies when mining technogenic deposits formed as a result of storing the enrichment waste in tailing ponds. Practical implications. The "Recommendations for substantiating the parameters of the processes of accumulating capacity restoring of a pond with the use of hydromechanization devices" and "Methods for calculating the parameters for hydraulic transportation of highly-concentrated hydraulic mixtures", have been developed, which may be useful for design organizations and mining-metallurgical enterprises to provide additional volumes of raw material output and increase the tailing ponds lifetime.

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Section: Figure 7 Approximation Of the Dependence Of Value B On Kmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parameters determination of hydromechanization technologies for the dumps development as technogenic deposits

Blyuss¹,

Semenenko²,

Medvedieva³

et al. 2020

Min. miner. depos.

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“…Alternative approaches and lixiviants for extraction of Sc and other REEs from RM are also known. These options may include the use of ionic liquids, bioleaching processes, , and also carbonation (sometimes called “carbonization”) leaching processes with using gaseous carbon dioxide (CO 2 (g)) and carbonate reagents (NaHCO 3 and/or Na 2 CO 3 ). − Such approaches may solve some of the problems associated with the use of concentrated mineral acid solutions, for example, the high corrosive activity of mineral acids, and the formation of multicomponent salt solutions, which are difficult to recycle and utilize.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, mineralogical compositions of differently sourced RM suspensions may differ, and this can significantly affect the efficiency of the processing method or make it not applicable for specific types of RM. Both individual stages and an integrated approach to RM processing in carbonate media are being considered and researched currently in Russia. − …”

Section: Introductionmentioning

confidence: 99%

Evaluation of Main Factors for Improvement of the Scandium Leaching Process from Russian Bauxite Residue (Red Mud) in Carbonate Media

et al. 2021

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The carbonate leaching of scandium from the landfilled bauxite residue (red mud) of the Bogoslovsky Aluminum Plant (Russia) and samples of red mud (RM) after alkaline pretreatment has been investigated. The results of kinetic studies allowing to compare and evaluate the effectiveness of different conditions and intensification factors in the process of scandium leaching from RM in carbonate/bicarbonate media are presented. It was determined that for 2.0 mol L –1 Na 2 CO 3 leaching solution ultrasonic treatment under gas (CO 2 ) carbonation conditions in the pH range of 9.5–10.0 allows reducing the scandium leaching time by two times and reaching 40–45% scandium extraction. Leaching of RM in carbonate/bicarbonate media is accompanied by secondary processes (adsorption, hydrolysis, and coprecipitation) leading to a decrease in scandium extraction. The obtained results allow improving understanding of scandium chemical behavior in complex aqueous carbonate/bicarbonate systems and can be used for the optimization of the alternative carbonate process for scandium extraction from RM.

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“…There are various technologies for processing red mud, in particular, those discussed in scientific study [25]. Currently, there is a technology of processing red mud using carbon dioxide, which allows the extraction of scandium [26,27]. The technology of scandium extraction from red mud using carbon dioxide of exhaust gases was developed [3].…”

Section: Introductionmentioning

confidence: 99%

The Kinetic Aspects of the Dissolution of Slightly Soluble Lanthanoid Carbonates

Литвинова

Kashurin

Zhadovskiy

et al. 2021

Metals

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The problem of the complex use of mineral raw materials is significant in the context of many industries. In the rare earth industry, in the context of limited traditional domestic reserves and dependence on imports of lanthanides, an unambiguous and comprehensive solution has not yet been developed. Promising areas include the involvement of technogenic raw materials in the industrial turnover. The present study examines the kinetics of the dissolution process of poorly soluble lanthanide compounds when changing the parameters of the system. The results obtained reflect the dependence of the degree of extraction of lanthanide on the following variable parameters of the system: temperature, concentration of the complexing agent, and intensity of mixing. On the basis of the experiment, the values of the activation energy and the reaction orders were calculated. The activation energy of the carbonate dissolution process, in kJ/mol, was as follows: 61.6 for cerium, 39.9 for neodymium, 45.4 for ytterbium. The apparent reaction orders of the carbonates are equal to one. The prospect of using the research results lies in the potential to create a mathematical model of the process of extracting a rare earth metal by the carbonate alkaline method.

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Carbonization leaching of scandium from red mud with preliminary pulp gassing by carbonic acid

Cited by 4 publications

References 0 publications

Parameters determination of hydromechanization technologies for the dumps development as technogenic deposits

Parameters determination of hydromechanization technologies for the dumps development as technogenic deposits

Evaluation of Main Factors for Improvement of the Scandium Leaching Process from Russian Bauxite Residue (Red Mud) in Carbonate Media

The Kinetic Aspects of the Dissolution of Slightly Soluble Lanthanoid Carbonates

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