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Updated: Jan 24, 2026

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
Published on: February 21, 2017
The Indirect Mineral Carbonation of Electric Arc Furnace Slag Under Microwave Irradiation
Zhibo Tong1,2, Guojun Ma2, Dan Zhou1
1The Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology, Yangtze Normal University, 408100, Chongqing, China.
Abstract:
The indirect mineral carbonation of industrial residues is one of the potential technologies for CO2 sequestration. In this paper, the leaching and carbonation of electric arc furnace (EAF) slag under microwave irradiation was investigated. The experimental results show that the main reactive calcium-containing phase in the EAF slag carbonation process is calcium silicate, and the final leaching ratio of larger particles is lower than that of smaller particles due to the silica layer produced on the surface of the calcium silicate. The Drozdov equation with a self-impeding coefficient can describe EAF slag leaching kinetics under microwave irradiation. The explosive homogeneous nucleation phenomenon under microwave irradiation contributes to the thinning and narrowing of crystals. Microwave irradiation can inhibit the crystaltype transformation of vaterite.
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