Abstract
Dumps for coal-fired thermal power plant ash-and-slag mixture storage occupy large areas and require considerable costs. The chemical composition of such mixtures is quite diverse and includes a large number of chemical elements, thus providing ample opportunities to be used in various ways. In this article, the oxidation–remediation processes and melt formation in the Al-C-Ca-Fe-K-Mg-Mn-Na-P-Si-Ti-B-Cr-F-N-H-O system have been studied. The techniques of a model formation and numerical experiment performance, setting the initial conditions and limitations, p,T-scenarios of the processes, and analysis of the simulation results are shown. For better demonstration, a generalized model reflecting the most typical features of the ash-and-slag mixture melting processes is provided. A physical–chemical modeling method is based on finding the global minimum of the thermodynamic potential (Gibbs energy) of the modeled system on the set of limitations established by the system of mass balance equations. The melting process has been investigated under two scenarios: amorphous and crystalline phases. The results of the equilibrium composition of the system are given as a function of the ash–slag mixture melting temperature.
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The reported study was funded by RFBR, Project No. 19-33-60077\19.
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Grushko, I.S., Bychinskii, V.A. & Chudnenko, K.V. Physicochemical Simulation of the Melting Process of Silicon-Containing Waste from the Energy Complex. JOM 73, 3000–3009 (2021). https://doi.org/10.1007/s11837-021-04820-w
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DOI: https://doi.org/10.1007/s11837-021-04820-w