Desulfurizing metal with the use of nepheline ore

Bryukhovetskii, S. S.; Karpenko, A. A.; Orobtsev, Yu. V.; Tatarinova, Z. Ya.; Podoprigora, I. D.; Teplitskii, E. B.; Terziyan, P. G.; Tol'skii, A. A.

doi:10.1007/bf00733834

Cited by 2 publications

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“…The use of nepheline syenite or nepheline as a slag modifying agent has been investigated by a number of researchers. 2,[13][14][15][16][17] The primary objective of these studies has been to focus mainly on the rheology and mineralogy of the slags. Gitterle 9 has reported an investigation of the iron content in different size fractions of the post-treated slag from desulphurisation after slag skimming.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of iron losses during desulphurisation of hot metal utilising nepheline syenite

Magnelöv

Eriksson

Drugge

et al. 2013

Ironmaking & Steelmaking

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Iron losses during calcium carbide based hot metal desulphurisation have been studied via large scale investigations of slag from the slag pit as well as slag sampling during desulphurisation at SSAB EMEA in Luleå . The desulphurisation slag, after injection of calcium carbide, is normally solid and contains large amounts of iron. An alkali containing mineral, nepheline syenite, was mixed together with the calcium carbide to form a more fluid slag as the iron losses originate from enclosed metal droplets in the slag as well as drawn off hot metal during slag skimming. The slag amount after slag skimming decreased from 28?1 to 25?1 kg t 21 hot metal with addition of 5 wt-% nepheline syenite to the calcium carbide, and the magnetic fraction of the slag from the slag pit decreased from 2?5 to 1?9%. Finally, no negative effect on the reagent efficiency was observed during the trials with addition of nepheline syenite.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of iron losses during desulphurisation of hot metal utilising nepheline syenite

Magnelöv

Eriksson

Drugge

et al. 2013

Ironmaking & Steelmaking

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show abstract

“…Based on previous studies, it was reported that an addition of nepheline syenite(NS) containing alkali oxides such as Na 2 O and K 2 O can improve some properties of the slags such as increased dissolution rate of CaO, decreased slag viscosity, lowered melting slag temperature and an increased fluidity of the slag. These are beneficial for the kinetics of sulfur refining of the hot metal.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nepheline Syenite on Iron Losses in Slags during Desulphurization of Hot Metal

Yang

Karasev

Jönsson

2015

steel research int.

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The effect of injection of nepheline syenite (NS) together with CaC2 and C on the iron losses in form of metal droplets in a slag during desulphurization of hot metal is investigated in industrial trials. The characteristics of different metal droplets (such as morphology, number, size and composition) in slags of trials without and with injection of a NS are investigated using SEM. All metal droplets in the slag are classified into three groups according to morphology: Type A‐spherical/oval; Type B‐spherical/irregular; Type C‐irregular. It is found that the addition of NS influences the compositions of hot metal, slag and metal droplets in slag. As a result, the amount (area fraction) and size of metal droplets decreased for Type A and B and increased significantly for Type C droplets present in the slag.

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Desulfurizing metal with the use of nepheline ore

Cited by 2 publications

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Investigation of iron losses during desulphurisation of hot metal utilising nepheline syenite

Investigation of iron losses during desulphurisation of hot metal utilising nepheline syenite

Effect of Nepheline Syenite on Iron Losses in Slags during Desulphurization of Hot Metal

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