Possibility of application of aluminosilicochrome in the metallothermy of refined ferrochrome

Akuov, A.; Tolymbekov, M. Zh.; Izbembetov, D. D.; Almagambetov, M.

doi:10.1134/s0036029512120026

Cited by 4 publications

(3 citation statements)

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“…Unlike the magnetite and hematite, the wüstite -ferrous oxide represents, by definition, a synthesis oxide of iron [1,2] with a variable composition close to FeO (23.10 wt% Fe 0.85 O ÷ 25.10 wt% Fe 0.95 O) [3] and with stability for oxygen in excess.…”

Section: Introductionmentioning

confidence: 99%

“…The ferrous-ferric oxide can be obtained during solidification through a peritectic reaction (L+Fe 3 O 4 →wüstite) and after decomposes through eutectoid reaction, at 560 o C, in α-iron and Fe 3 O 4 ; the ferrous oxide can be also obtained through thermal decomposition of ferrous oxalate in the absence of air [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…The magnetite (solid solution based on a chemical compound of Fe 3 O 4 , with an oxygen concentration of 27.6 wt%) represents the mixed oxide FeO.Fe 2 O 3 , which is melting congruently at 1597 o C [2] and is stable in the whole temperature range; the synthesis of the ferrous-ferric oxide can be achieved by burning of the metallic iron or by powerful calcinations of the other oxides [3].…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamics of Iron Metallothermy

Cojocaru

Brânzei

Coman

2015

AMR

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Besides other possible applications, the thermitic compositions based on iron oxides are meant to the achieving of the permanent joints of the railroad tracks. In addition to the iron oxides, the thermitic kit include also the reducing agent – aluminum powder, a carbon source to adjust the percent of this element in the obtained steel and a flux with a view to allow the steel composition and temperature control. The metallothermic process efficiency is given by strictness in the selection of ratio of the thermitic components and mainly in that of the iron oxides types. Their correct dosage makes possible the estimation and rigorous control of the thermal effect of reactions. In this work, using thermodynamic calculations, is analyzed and quantified the development of the thermal effect of the metallothermic reduction reactions of iron oxides depending on the iron oxides proportions in the thermitic composition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamics of Iron Metallothermy

Cojocaru

Brânzei

Coman

2015

AMR

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The Use of Combustion Reactions for Processing Mineral Raw Materials: Metallothermy and Self-propagating High-temperature Synthesis (Review)

Уракаев

Akmalaev

Orynbekov

et al. 2015

Metall Mater Trans B

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Development of the smelting technology of complex aluminum-chrome-silicon-containing ASC alloy from substandard raw materials

Orlov

Isagulov

Sariev³

et al. 2018

Izv. vysš. učebn. zaved., Čern. metall.

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Scientists of the Chemical-Metallurgical Institute named after Zh. Abishev develop new types of highly effective alloys based on resource-saving technologies that allow the complex processing of natural and technogenic raw materials, such as carbonaceous waste, chrome ore fines, etc. Therefore, it has led to the creation of a onestage, slag-free and non-waste technology with the maximum use of all useful charge components. With disappearance of rich ore reserves, as well as the expansion of demand for raw materials and the development of technology, the rich ores are replaced by poorer and substandard ones that require new methods of processing. The maximum use of raw materials and industrial waste, if this is economically justified, is one of the basic requirements for the technology. This task is closely intertwined, and in many cases coincides with another task – the development of integrated methods of raw materials processing, which, in the general production cycle, allows using, if possible, all useful elements of raw materials. The main objective of the study is to find ways to improve the use of sub-standard chrome ore. As a reducing agent in the electrothermal smelting of the ACS alloy, instead of expensive coke, without which no process of carbothermic smelting is required, a cheap high-ash Borly coal was used. The coal ash, which mainly consists of silica and alumina, is an additional source of silicon and aluminum in the alloy. This technology will be simple and allows regarding substandard chromium ore as a complex metallurgical raw material, since not only chrome is used, but also the components of the waste rock – silicon and aluminum. As a result of the complete reduction of all charge oxides, this technology will make it possible to obtain a complex alloy of ACS with an approximate chemical composition: 39 – 43 % of chromium, 23 – 27 % of silicon, 7 – 10 % of aluminum. The transition of the main components of the charge to the alloy will be: 82 – 85 % of chromium, 68 – 70 % of silicon, 59 – 60 % of aluminum. In this paper, the results of experimental studies on the production of a complex alloy of ACS (aluminum-chromium-silicon) from high-ash coals of the Borly deposit and chrome ore minerals of the Donskoi GOK are presented. The course of furnace operation is described with a lack, excess, and also the calculated amount of the reducing agent. The ways of eliminating the upset in furnace operation are shown.

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Possibility of application of aluminosilicochrome in the metallothermy of refined ferrochrome

Cited by 4 publications

References 0 publications

Thermodynamics of Iron Metallothermy

Thermodynamics of Iron Metallothermy

The Use of Combustion Reactions for Processing Mineral Raw Materials: Metallothermy and Self-propagating High-temperature Synthesis (Review)

Development of the smelting technology of complex aluminum-chrome-silicon-containing ASC alloy from substandard raw materials

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