This study investigates the pattern of influence blast furnace slag tempering on composition and structure steel slag. The chemical composition, equilibrium phase microscopic morphological characteristics elemental regions modified by high temperature reconstruction were analyzed using X-ray diffractometer (XRD), FactSage7.1 thermodynamic analysis software, mineral microscopy field emission sca...

A new twin-roll continuous slag solidification process and heat recovery process from a slag packed bed was developed for utilization of the waste heat of steelmaking slag. Plate-shaped slag with the thickness about 7 mm was successfully produced in a pilot plant, and the sensible heat of the slag was recovered by blowing air into the slag chamber. However, the gas distribution inside the slag ...

Calcium yttrium aluminate (CaYAl3O7) crystal was grown and characterized in detail for high temperature piezoelectric sensors for the first time. The thermal properties of the CaYAl3O7 (CYAM) crystal were investigated systematically. In particular, the CYAM crystal exhibits considerably high resistivity along Xand Zdirection in the order of 6.96 × 107 Ω·cm and 2.86 × 108 Ω·cm at 600 ◦C, respect...

This paper discusses the design of hybrid alkali-activated binders at ambient temperature, specifically development mixes based on ground granulated blast-furnace slag (GGBFS) with calcium aluminate cement (CAC) as an additive, aiming to obtain high early strength optimised Al incorporation, increased crosslinking and degree polymerisation. The effects 10 wt% CAC replacement GGBFS, activated so...

Ettringite is a hexacalcium aluminate trisulfate hydrate mineral that forms during Portland cement hydration. Its presence plays an important role in controlling the setting rate of the highly reactive aluminate phases in cement paste and has also been associated with severe cracking in cured hardened cement. To understand how it forms and how its properties influence those of hardened cement a...

this research was conducted for the purpose of studying the effect of caf2 content in the composition of hotmetal pretreatment flux, based on lime. it was followed in regards to the importance of fluorine amount decrease in hot metal pretreatment and steel making processes. for this purpose, lime based fluxes including 40, 30, 20 and 10 percent calcium fluoride were prepared and hot metal pretr...

Component concentration of sodium aluminate solution is an important quality index for alumina production. In this article, we propose a new on-line soft sensing strategy for measuring component concentration of sodium aluminate solution. With this method, on-line control can be realised in aluminate production plants. Several advance techniques are used, such as principal component analysis (P...