Manganese Biomining from Manganese-Bearing Industrial Wastes of Georgia

Sakhvadze, David; Raphava, Aza

doi:10.1007/s40033-020-00235-0

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…Figures 1 and 2 give details of the types of manganese ore beneficiation wastes in the Chiatura mining enterprise, their qualitative and quantitative characteristics, and the annual amounts of oxidic waste generated from ferrosilicomanganese smelting at the Zestafoni ferroalloy plant. Each year an additional 500 000 t of slime (10-11% Mn), 250 000 t of so-called agglomeration grade (14-16% Mn), and 350 000 t of intermediate product (15-16% Mn) are generated (Jandieri, Sakhvadze, and Raphava, 2020;Sasmaz, Sasmaz, and Hein, 2021).…”

Section: Analysis and Discussion Of Resultsmentioning

confidence: 99%

Increasing the efficiency of secondary resources in the mining and metallurgical industry

Jandieri

2023

J. S. Afr. Inst. Min. Metall.

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An improved methodology is presented for assessing the economic feasibility and effectiveness of recycling industrial waste. The methodology is based on the break-even control mechanism, but at the same time provides for the introduction of new evaluation criteria such as the threshold of conditionality and the degree of ore substitution. Based on an improved analysis, it becomes possible to more precisely predict recycling efficiency. A more refined determination of the lower limit of concentration of recoverable metals, at which technogenic waste can be assigned the status of secondary raw materials and processed profitably, leads to a significant expansion of the secondary raw material base suitable for recycling. The potential for recycling manganese-containing dust from the production of ferrosilicomanganese, dehydrated sludge from the hydro separation of slags, and cake from the production of electrolytic manganese dioxide at the Chiatura mining enterprise is used as an example. It is shown that with a threshold of -24% Mn content, the highest recycling efficiency can be achieved by the production of low-phosphorus manganese slag and conversion to ferrosilicomanganese using the above waste to replace 40-60% grade III and IV manganese concentrates in the feed.

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Section: Analysis and Discussion Of Resultsmentioning

confidence: 99%

Increasing the efficiency of secondary resources in the mining and metallurgical industry

Jandieri

2023

J. S. Afr. Inst. Min. Metall.

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“…Underground biotechnological extraction of minerals can achieve an extension of the life cycle of the existing mines of high-quality oxide and oxidizes manganese ores suitable for conventional metallurgical processing. Th e eff ectiveness of microbiological extraction of manganese from poor off -balance ores and benefi ciation wastes of noted ores of diff erent mineral compositions has already been shown by us in preliminary studies [15].…”

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confidence: 77%

Underground Development of Mineral Subsoil Using Microorganisms: A Mini-Review

Jandieri,

Sakhvadze,

Schukin

2023

Mikrobiol. Z.

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This mini-review is devoted to the analysis of the current state of the relatively rarely used underground bio-mining of natural minerals. On the basis of this analysis, it is substantiated that bacterial leaching technology has no alternative for environmentally safe and economically break-even mining of ore-bearing rocks and off -balance metal-bearing formations that are difficult to access, or unprofitable for traditional methods. It is emphasized that the efficiency of biotechnology depends on the accuracy of modeling and operational control of the working parameters of the process of biological extraction of metals, for which it is necessary to develop a new combined hydro-technical system with the possibility of the reverse technological influence on the regimes of leaching. Such controlled modes of the process are the intensity of forced aeration, pH level of the bacterial solution, amount of nutrient medium, and duration of leaching. To improve the accuracy of prediction and control of underground microbiological development, the use of a control method based on an adaptive-network-based fuzzy inference system (ANFIS) is recommended.

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A new technological approach to the granulation of slag melts of ferrous metallurgy: obtaining glassy fine-grained granules of improved quality

Sakhvadze

Jangveladze²,

Sakhvadze³

2021

J. Eng. Appl. Sci.

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The technological factors required to improve the operational properties of granulated metallurgical slags demanded in the building industry have been analyzed. In order to satisfy these factors, a new technology for hydro-vacuum granulation of slag melts (HVG) has been developed. It is shown that the main advantage of the proposed HVG process is the provision of forced high-speed vortex convection of water, with the effect of vertical suction, crushing, and degassing of the three-phase (water–slag granules–water vapor) heterogeneous medium formed during the overcooling and solidification of slag. It is proved that the high-speed volumetric disintegration and overcooling with the degassing effect sharply reduces a degree of aggressive gas/vapor impact on the being cooled particles of slag, which, in turn, leads to the reduction of the perforation degree of the granules. The obtained granules are distinguished by stable fractionation and improved, well-defined dense amorphous glassy structure, the water-holding capacity of which has reduced from 45–50% to 25–13%, the actual moisture content from 24–20% to 6–4%, while the hydraulic activity in terms of CaO-uptake increased from the conventional 320–360 mg/g to 610–650 mg/g. Pilot scale research demonstrated that the designed equipment for the HVG technology allows sustainable control of the quality of granules, and it has the potential for further development and implementation.

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Manganese Biomining from Manganese-Bearing Industrial Wastes of Georgia

Cited by 3 publications

References 28 publications

Increasing the efficiency of secondary resources in the mining and metallurgical industry

Increasing the efficiency of secondary resources in the mining and metallurgical industry

Underground Development of Mineral Subsoil Using Microorganisms: A Mini-Review

A new technological approach to the granulation of slag melts of ferrous metallurgy: obtaining glassy fine-grained granules of improved quality

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