The Preparation of Ferroboron and Ferrovanadium by Aluminothermic Reduction

Yücel, Onuralp; Çınar, Fırat; Addemir, O.; Tekin, Ahmet

doi:10.1515/htmp.1996.15.1-2.103

Cited by 35 publications

(7 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whether or not a reaction provides enough exothermic heat of reaction for successful smelting can be assessed by a rule of thumb (Gupta and Krishnamurthy, 1992;Yü cel et al, 1996), where the heat of reaction is expressed as kilojoules per kilogram of all products. If this value is:…”

Section: Aluminothermic Smelting Of Vanadium Oxidesmentioning

confidence: 99%

Understanding ferrovanadium smelting through computational thermodynamics modelling

Swinbourne

Richardson²,

Cabalteja³

2016

Mineral Processing and Extractive Metallurgy

View full text Add to dashboard Cite

Ferrovanadium is essential for the production of many alloy steels. It is made by the aluminothermic reduction of vanadium oxides, together with scrap steel and burnt lime as a flux at very high temperatures. In this work, the theory of aluminothermic reduction is discussed, and then a computational thermodynamics model is described and its input parameters are discussed and justified. The model predicted very satisfactorily the composition of both the ferrovanadium and waste slag from a heat at the Windimurra smelter in Western Australia. Moreover, the modelling revealed that published data on the activity coefficient of VO 1.5 in slag were likely to be seriously in error. It was shown that increasing the recovery of vanadium to the ferroalloy was accompanied by a rapid increase in its aluminium content, which is limited by commercial specifications. The limit on the silicon content of ferrovanadium can only be met by limiting the input of SiO 2 to the furnace. The model provides a useful basis for assessing process improvements.

show abstract

Section: Aluminothermic Smelting Of Vanadium Oxidesmentioning

confidence: 99%

Understanding ferrovanadium smelting through computational thermodynamics modelling

Swinbourne

Richardson²,

Cabalteja³

2016

Mineral Processing and Extractive Metallurgy

View full text Add to dashboard Cite

show abstract

“…Although nitrogen is capable of being introduced into the melt by blowing N-bearing gases, the final composition of the melt is generally corrected by adding N-bearing alloys. Up to now, various alloys, including vanadium nitride (VN), vanadium carbonitride (V(C, N)) and ferrovanadium nitride (FeVN), have been proposed for the combined introduction of vanadium and nitrogen into the molten steel [5][6][7][8][9]. Vanadium carbonitride has been researched for many years; however, its practical use is inhibited by its low briquette density (≈3 g/cm 3…”

Section: Introductionmentioning

confidence: 99%

Reduction and Nitridation of Iron/Vanadium Oxides by Ammonia Gas: Mechanism and Preparation of FeV45N Alloy

Liu

Wang

You

et al. 2020

Metals

View full text Add to dashboard Cite

The steel micro-alloyed with ferrovanadium nitride has extremely superior properties that make it widely utilized in structural components, construction and aircraft. The conventional methods for synthesizing ferrovanadium nitride include nitridation of pure ferrovanadium alloy or carbothermal nitridation of metallic oxides, using nitrogen or ammonia gas as nitrogen sources. In this study, ferrovanadium nitride (FeV45N) was prepared by direct reduction and nitridation of the corresponding metal oxides with ammonia as the reductant and nitrogen source. This method avoids the introduction of other impurity elements, except the negligible trace elements accompanied with the raw materials. The thermodynamics of the reduction and nitridation process were initially analyzed. During the subsequent ammonia reduction process, the FeV45N powders were successfully obtained at 1273 K for 6 h. The obtained powders were pressed into cylindrical briquettes by hot pressing (HP) at 1473 K for 1 h in vacuum. In the investigation, the X-ray diffraction and morphological analysis of the products was also carried out, and the reaction mechanisms were discussed in detail. The nitrogen content of the final product can reach 11.85 wt. %, and the residual oxygen content can be reduced to 0.25 wt. %. By sintering, the density of the alloy can reach 5.92 g/cm 3 .

show abstract

“…This was done by using the software "RikiAlC", developed primarily for the aluminothermic processes and extended for some carbothermic processes. The various ores and metal-oxides can be used for producing the FeTi [3,5], FeW [6], FeB [7,8], FeMo [9]. For carbothermic reaction primarily the mixture of a mill scale, pyrite cinders and magnetite fines are used.…”

Section: Introductionmentioning

confidence: 99%

Semi-empirical software for the aluminothermic and carbothermic reactions

Gavrilovski¹,

Manojlović²,

Kamberović³

et al. 2014

Metall Mater Eng

View full text Add to dashboard Cite

Understanding the reaction thermochemistry as well as formatting the empirical data about element distribution in gas-metal-slag phases is essential for creating a good model for aluminothermic and carbothermic reaction. In this paper modeling of material and energy balance of these reactions is described with the algorithm. The software, based on this model is basically made for production of high purity ferro alloys through aluminothermic process and then extended for some carbothermic process. Model validation is demonstrated with production of FeTi, FeW, FeB and FeMo in aluminothermic and reduction of mill scale, pyrite cinders and magnetite fines in carbothermic process.

show abstract

The Preparation of Ferroboron and Ferrovanadium by Aluminothermic Reduction

Cited by 35 publications

References 1 publication

Understanding ferrovanadium smelting through computational thermodynamics modelling

Understanding ferrovanadium smelting through computational thermodynamics modelling

Reduction and Nitridation of Iron/Vanadium Oxides by Ammonia Gas: Mechanism and Preparation of FeV45N Alloy

Semi-empirical software for the aluminothermic and carbothermic reactions

Contact Info

Product

Resources

About