Improvement of the technology for the production of pellets and new iron ore raw materials for modern blast-furnace smelting. Volume 2.

Zhuravlev, F. M.; Lyalyuk, Vitalii; Stupnik, Nikolay; Morkun, Vladimir; Chuprinov, E. V.; Kassim, D. A.

doi:10.46489/l0122019op2020

Cited by 2 publications

(7 citation statements)

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“…The amount of bentonite clay in the charge is (by dry weight) 0,5-1,0 %, lime -2-5 %. The amount of organic binder additives in the charge is 0,05-0,1 %, that is, an order of magnitude lower than bentonitic clay [2].…”

Section: Introductionmentioning

confidence: 89%

“…alkaline, where more than half of the components of the exchange complex are sodium and potassium cations (Na + + K + , mEq/100 g clay); alkaline-earth (calcium, magnesium, calcium-magnesium and magnesium-calcium), where more than half of the exchange cations belong to calcium and magnesium (Ca ++ + Mg ++ , mEq/100 g clay) [2]. Moreover, for the production of pellets by rheological characteristics, bentonite clays with an alkaline exchange complex are most suitable (in an aqueous medium of a certain hardness).…”

Section: Analysis Of Problem Statementmentioning

confidence: 99%

“…Studies have shown that increasing water hardness significantly reduces the swelling and water absorption of bentonites with an alkaline exchange complex (table 1) and practically does not affect these indicators in bentonites with an alkaline-earth exchange complex [2]. Moreover, an increase in the hardness of process water, for example, Severny GOK (SevGOK) from 8,8 mEq/dm 3 in 1979 to 127,6 mEq/dm 3 in 2017 led to a decrease in the swelling of bentonite from 10,2 to 4,3 times, and water absorption -from 344 to 178 %.…”

Section: Analysis Of Problem Statementmentioning

confidence: 99%

“…For example, only recently more in-depth studies of the Tikhmenevskoye field (Sakhalin) has begun, more attention are paid now to the deposits of the Central region [4], Voronezh anteclise [5], Cherkasy and others. Scattered works, devoted to these deposits showed that, for a number of qualitative characteristics, these clays do not fully meet the requirements contained in the technical specifications for bentonite clays for pelletizing factories [2], because these bentonites (table . 2) are alkaline earth, while specifications require Na-montmorillonite to be contained in the bentonite. The last leads to a high swelling of clay and the ratio of the amount of sodium with potassium to the sum of calcium with magnesium and the ratio of sodium oxide to potassium oxide naturally exceeding unity.…”

Section: Analysis Of Problem Statementmentioning

confidence: 99%

“…Thus, the geographical location, favorable mountain and environmental conditions for the extraction of these clays in large quantities and the prospects for the use of pellets in the production process provide reliable grounds for choosing these clays as the most worthy object of research. The most effective method for improving the rheological characteristics of alkaline-earth bentonites is their modification, that is, changing their metabolic complex in alkaline with the least cost [2].…”

Section: Analysis Of Problem Statementmentioning

confidence: 99%

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Possibilities of Using Alkaline Earth Bentonite Clays of Cherkasy Deposit in Pellet Production Processes

Zhuravlev¹,

Chuprinov²,

Tarakanov³

et al. 2022

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Objective: to analyze and determine the potential of alkaline earth bentonite clays of Ukraine for use as a binder in the production of iron ore pellets. Methods: performing rheological studies of bentonite clay samples and their chemical analysis, electron microscopic studies of samples. Results: the analysis of the chemical composition and requirements for the rheological characteristics of bentonite clays used in the production of iron ore pellets at metallurgical enterprises of Russia and Ukraine is carried out. The swelling indicators and water absorption of monoionic forms of bentonites of some deposits in water of different hardness are given. The quality of pellets with bentonites, that have a different exchange complex, during an industrial water of various hardness usage is examined. The analysis of the mineralogical and chemical composition, as well as the size and composition of the exchange complex of alkaline-earth bentonite clays of the Cherkasy deposit (Ukraine), which has the largest reserves of such clays in the CIS is carried out. It is shown that clays suitable for the production of pellets are located near the surface of the earth. A comparative analysis of the strength characteristics of pellets using bentonites with an alkaline and alkaline-earth exchange complex is presented. 484 Comparative tests of pelletizing of charges with different humidity and with the addition of 0.5% alkaline bentonite and a mixture of clays of the IV and II layers of the Cherkasy deposit have been carried out. It is shown that with increasing humidity in granules with both types of binders, the dynamic strength, porosity and temperature of the “impact” of granules increase with a minimum difference in the absolute values of indicators with different binders

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Section: Introductionmentioning

confidence: 89%

Section: Analysis Of Problem Statementmentioning

confidence: 99%

Section: Analysis Of Problem Statementmentioning

confidence: 99%

Section: Analysis Of Problem Statementmentioning

confidence: 99%

Section: Analysis Of Problem Statementmentioning

confidence: 99%

See 3 more Smart Citations

Possibilities of Using Alkaline Earth Bentonite Clays of Cherkasy Deposit in Pellet Production Processes

Zhuravlev¹,

Chuprinov²,

Tarakanov³

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Study of the influence of different types of bentonite clays on the quality indicators of pellets

Chuprinov¹,

Lyalyuk²,

Zhuravlev³

et al. 2020

Theory and Practice of Metallurgy

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Objective: to analyze and determine the influence of bentonite clays of different deposits and exchange ionic complexes on the metallurgical properties of iron ore pellets. Methods: performing rheological studies of bentonite clay samples and their chemical analysis, electron microscopic studies of samples. To assess the metallurgical characteristics of the pellets obtained, the moisture of the pellets, the compressive strength of the wet and dry pellets, the number of dumpings without destroying the wet pellets, and the temperature of the «shock» have been determined. Results: laboratory tests were conducted to determine the suitability of bentonite clays of different mineralogical composition and exchange ion complex for the production of pellets. Tests have shown that the impact resistance and compression resistance of raw pellets at a slightly increased specific consumption of bentonite Cherkasy alkaline-earth bentonite does not concede to the same properties of pellets with the use as a binder alkaline Saryugyhsky bentonite. It is demonstrated that to ensure good quality of raw pellets, an auspicious variety of clays of the Cherkasy deposit are clays of the IV layer, which are a natural mixture of alkaline-earth bentonite of the II layer and palygorskite (III layer). Tests of composite mixtures of clays IV with II and II with III layers showed that the quality of raw pellets with Cherkassky bentonite is slightly worse than with Sarygyuhsky, however, the absolute values of their indicators satisfy the industry requirements. Comparative tests of pelletizing of charges with different humidity and with the addition of 0.5% alkaline bentonite and a mixture of clays of the IV and II layers of the Cherkassky deposit have been carried out. It is shown that with increasing humidity in granules with both types of binders, the dynamic strength, porosity and temperature of the “impact” of granules increase with a minimum difference in the absolute values of indicators with different binders. To objectively confirm the possibility of using alkaline-earth bentonite of the Cherkassky deposit (II-III-IV layers) in the production of pellets, it is necessary to conduct comparative industrial tests at a pelletizing plant (for example, SevGOK), using a concentrate with the in-creased hardness of industrial water. Scientific novelty: the influence of alkaline bentonite replacement in charge for pellet production with alkaline earth, paligorskite clays and mixtures of their forms has been studied. The comparative influence of moisture content of raw pellets on their porosity and strength characteristics with alkaline and alkaline earth bentonites in the charge was studied. Practical significance: using the properties of raw, dry and calcined pellets as an example, the possibility of using less scarce and expensive local bentonite clays instead of expensive exported alkaline clays without impairing the production technology and characteristics of the pellets is shown.

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Improvement of the technology for the production of pellets and new iron ore raw materials for modern blast-furnace smelting. Volume 2.

Cited by 2 publications

References 0 publications

Possibilities of Using Alkaline Earth Bentonite Clays of Cherkasy Deposit in Pellet Production Processes

Possibilities of Using Alkaline Earth Bentonite Clays of Cherkasy Deposit in Pellet Production Processes

Study of the influence of different types of bentonite clays on the quality indicators of pellets

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