Production of mineral binder from steel-smelting slag

Михеенков, М. А.; Sheshukov, O. Yu.; Nekrasov, I. V.; Egiazar’yan, D. K.; Лобанов, Д. А.

doi:10.3103/s0967091216030098

Cited by 3 publications

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“…In our previous work [5] the alumina flux addition to the LF slag composition formed the stable phases -C 2 S, -C 2 S, C 12 A 7 providing a good hydraulic activity. The mayneite C 12 A 7 mixed with gypsum and dihydrate hardens according to the following Equation…”

Section: Phase Compositionmentioning

confidence: 99%

Reduction Of Environmental Pressure By Giving Cementing Material Properties To The Ferrous Slags

Михеенков¹,

Yu.²,

Лобанов³

2017

Kms

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There are two main kinds of slag in modern steelmaking industry: the electric arc furnace slag (the EAF slag) which is produced in the manufacture of crude steel by the electric arc furnace process and the ladle furnace basic slag (the LF slag) which is produced at the final stages of steelmaking, when the steel is desulfurized in the transport ladle, during what is generally known as the secondary metallurgy process. Table 1 demonstrates the chemical composition of these slags.X-ray diffraction analysis has showed [1] that EAF slag contains wuestite FeO, magnetite Fe 3 O 4 , merwinite C 3 MS 2 (3CaO MgO 2SiO 2 ) phases and the high-temperature modification -C 2 S which is known as bilithlarnite. XRD analysis also shows that LF slag contains three main phases: mayenite C 12 A 7 (12CaO.7Al 2 O 3 ), periclase MgO and shannonite -C 2 S ( -2CaO.SiO 2 ), the latter being the low-temperature modification of belite. In accordance with semiquantitative analysis the slags have different phase compositions (mass. %): 20,4 FeO; 24,1 Fe 3 O 4 ; 15,9 C 3 MS 2 ; 38,15 -C 2 S; 1,45 of the others for the EAF slag and 37,2 C 12 A 7 ; 12,5 MgO; 41,4 -C 2 S; 8,9 of the others for the LF slag.The EAF slag consists of stable phases and so it is used for processing by simple methods of grinding and classification [2,3]. Final crushed stone produced that way is only used as aggregate in road construction.However, the ladle furnace slag is difficult to utilize a due to the significant content of shannonite ( -C2S) generated when the slag is cooled to 830 ∘ C. Shannonite is generated during the high-temperature phase transformations from one polymorph to

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Section: Phase Compositionmentioning

confidence: 99%