By Krivenko, P. V.; Roy, D. M.; Shi, Caijun
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Extra info for Alkali-activated cements and concretes
In other operations, they use CaF2 for further refining purposes. Then the ladle slag consists mainly of CaO and SiO2 . 4 Mineral composition of steel slag Since the chemical composition of steel slag varies significantly from source to source, it can be expected that the mineralogical composition of steel slag can be very different from source to source. Reported minerals in steel slag include olivine, merwinite, C3 S, -C2 S, -C2 S, C4 AF, C2 F, RO phase (CaO-FeO-MnO-MgO solid solution), free-CaO and free-MgO (Shi 2004b).
For a given concentration and modulus, the nature of the silicate anions in the solution has a great effect on viscosity of the solution. Therefore, viscosity can reflect the difference in silicate anions to a great extent, but cannot be used to determine these silicate anions (Christophlienk 1985). 11. 3 Structure of liquid sodium silicate Early studies using cryoscopic, ultra centrifuging, light scattering, ultrafiltration, conductivity, molybdate and TMS methods provided detailed information on mean molecular weights, particle size and degree of condensation of silicate anions in a silicate solution.
3 Chemical composition of steel slag Chemical composition of steel slag is highly variable and changes from batch to batch even in one plant depending on raw materials, type of steel made, furnace conditions, etc. 6 lists the chemical composition ranges for different types of steel slag. Steel slag from EAF for the production of carbon steels is very similar to that from BOF. However, the slag from EAF for the production of alloy or stainless steels is quite different. It has a lower FeO content and a very high content of Cr, which leads to classifying the slag as a hazardous waste in US and Canada.