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Metals 2016, 6(5), 117; doi:10.3390/met6050117

Roles of Mineralogical Phases in Aqueous Carbonation of Steelmaking Slag

1
School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
2
State Key Laboratory of Hybrid ProcessIndustry Automation System and Equipment Technology, Automation Research and Design Institute of Metallurgical Industry, China Iron and Steel Research Institute Group, Beijing 100071, China
*
Author to whom correspondence should be addressed.
Academic Editor: Corby G. Anderson
Received: 29 March 2016 / Revised: 2 May 2016 / Accepted: 5 May 2016 / Published: 18 May 2016
(This article belongs to the Special Issue Recycling of Metals)
View Full-Text   |   Download PDF [3434 KB, uploaded 18 May 2016]   |  

Abstract

Mineralogical phases of steelmaking slags have significant influences on the carbonation of the slags. In this paper, the effects of temperature and reaction time on the conversion of calcium-related phases and the carbonation degree of a slag sample were studied. The experimental conditions were a liquid-to-solid ratio of 20 mL/g, a carbon dioxide flow rate of 1 L/min and a slag particle size of 38–75 μm. The results show that the optimum carbonation temperature and reaction time are 60 °C and 90 min, respectively, and calcite phase content is about 26.78% while the conversion rates of Ca3Al2O6, CaSiO3, Ca2SiO4 and free CaO are about 40%, 42.46%, 51% and 100%, respectively, and the carbon dioxide sequestration efficiency is about 170 g/kg slag. View Full-Text
Keywords: steelmaking slag; mineralogical phase content; carbonation degree; conversion rate steelmaking slag; mineralogical phase content; carbonation degree; conversion rate
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Zhang, H.; Lu, Y.; Dong, J.; Gan, L.; Tong, Z. Roles of Mineralogical Phases in Aqueous Carbonation of Steelmaking Slag. Metals 2016, 6, 117.

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