MoO3 Evaporation Studies from Binary Systems towards Choice of Mo Precursors in EAF

QC 20100913. Uppdaterad från in press till published (20101203).
The evaporation rate of molybdenum oxide from mixtures with CaO or MgO was studied in the temperature range 300-1573 K. The investigations were carried out using high temperature X-ray diffraction and thermogravimetry. Further, additions of these precursors to molten steel in the laboratory scale and the Mo yield achieved were determined. The X-ray studies show that the calcium molybdate is formed from the oxide mixture in the temperature interval 773-873K, which precedes the beginning of evaporation of MoO3. Results of thermogravimetric studies with mixtures CaO and MgO with MoO3 as well as the compounds CaMoO4 and MgMoO4 confirm the above results. Addition of various molybdenum precursors, viz, the mixtures of carbon with pure MoO3, CaMoO4 and MgMoO4, as well as oxide mixtures (CaO + MoO3, MgO + MoO3) show that the highest yield was observed for CaMoO4 + C and MoO3 + C mixtures, while MgO + C + MoO3 mixture showed much lower yield.

TEKNIK OCH TEKNOLOGIER Materialteknik Metallurgi och metalliska material hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Metallurgy and Metallic Materials hsv//eng
calcium and magnesium molybdates evaporation
steel alloying
Mo yields
calcium molybdate formation
Metallurgical process engineering
Metallurgisk processteknik

Teng, LidongKTH,Materialens processvetenskap(Swepub:kth)u1cd4hn6 (author)
Seetharaman, SeshadriKTH,Materialens processvetenskap(Swepub:kth)u1dt6m1e (author)
KTHMaterialens processvetenskap (creator_code:org_t)

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Metallurgy and M ...

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