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Slags from steel manufacturing have been proven to be suitable for CO 2 sequestration due to their remarkable reactivity related to the typical alkaline nature. In previous work, the research group demonstrated that maximum values of 280400 g CO 2 /kg slag (depending on the slag type) could be attained in slurry phase (L/S = 5 l/kg) at p = 10 bar and T = 100 #176;C.
#0183;#32;Various studies have shown that the carbonation of industrial residues such as steel slag may affect the environmental properties of the slag. The environmental properties (as assessed by leaching experiments) can be either improved or deteriorated in comparison to the original uncarbonated material depending on the leached metal, but also the precursor phase that contains the potentially
considering that a kW pulverizer operated for 60 seconds to grind 1 kg of steel slag. As reference, grinding of one tonne of cement clinker consumes an energy of 23 kWh/t (Madlool et al. 2011). Carbonation activated steel slag paste Prior to making fullsize steel slag masonry block, the reactivity of steel slag with carbon dioxide
Abstract. Steel slag has been used as supplementary cementitious materials or aggregates in concrete. However, the substitution levels of steel slag for Portland cement or natural
Pilot production of steel slag masonry blocks. Integrated and innovative steel slag utilization for Official FullText Publication: Integrated and innovative steel slag utilization for iron reclamation, greenAccelerated carbonation for steel slag treatment and utilization . .. extreme hardness and grinding resistance due to its high iron.
In this study, 60% of steel slag powders containing high freeCaO content, 20% of Portland cement and up to 20% of reactive magnesia and lime were mixed to prepare the binding blends. The binding blends were then used to cast concrete, in which up to of natural aggregates (limestone and river sands) were replaced with steel slag aggregates.
This work presents the results of carbonation experiments performed on Basic Oxygen Furnace (BOF) steel slag samples employing gas mixtures containing 40 and 10% CO2 vol. simulating the gaseous effluents of gasification and combustion processes respectively, as well as CO2 for comparison purposes. Two routes were tested, the slurryphase (L/S = 5 l/kg, T = 100#176;C and Ptot = 10 bar) and
Effect of steel slag grinding and prior leaching during carbonation experiments on leaching properties, leaching of (carbonated) steel slag relative to reuse criteria, particle size distribution of fresh and carbonated steel slag samples, experimental accuracy, pH stat leaching curves of all analyzed constituents including regulatory and detection limits, modeling curves for Co, Mo, and Zn.
Zhao X, Chen KM, Wang JD (2011) Application of KHM type horizontal roller mill in steel slag grinding system. Paper presented at 2011 Annual Meeting of China cement technology and the Thirteenth National Conference on Cement Technology,pp 96101. Chinese Society of Silicate Yichang, 2629 October 2011 Google Scholar
The effects of carbonation on structure and properties of steel slag specimens are evaluated by some different testing technologys in this paper. The experimental results of strength and soundness show that the compressive strength of samples is improved 68 times due to carbonation, and carbonated specimens have qualified autoclave soundness.
Effect of steel slag grinding and prior leaching during carbonation experiments on leaching properties, leaching of (carbonated) steel slag relative to reuse criteria, particle size distribution of fresh and carbonated steel slag samples, experimental accuracy, pH stat leaching curves of all analyzed constituents including regulatory and detection limits, modeling curves for Co, Mo, and Zn.
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