Chemsheet as a simulation platform for pyrometallurgical processes

Karri Penttilä, Justin Salminen, N Tripathi, Pertti Koukkari

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    ChemSheet is a thermodynamic multi-phase multi-component simulation software, which is used as an Add-in in Microsoft Excel. In ChemSheet, the unique Constrained Gibbs free energy method can be used to include dynamic constraints and reaction rates of kinetically slow reactions, yet retaining full consistency of the multiphase thermodynamic model. With appropriate data, ChemSheet models can be used to simulate reactors and processes in all fields of thermochemistry. The presentation will cover off-line modeling of Cu-flash smelters and advanced thermochemical simulation coupled with on-line process control of Cu-Ni smelting. The presentation will describe an off-line model of Cu-smelter based on critically assessed properties of the Al-Ca-Cu-Fe-O-S-Si- system (slag, matte and liquid metal) by using the quasichemical model. A four-stage reactor model (shaft, settler, uptake and bath) is used for optimizing process parameters and feed particle distribution. As a second example, an advanced thermochemical model of a Ni-Cu sulphide smelting plant will be given. The on-line model covers the operation of treating Ni-Cu-S concentrate via roasters, electric furnace and converters, producing a high grade Bessemer matte product for further refining. The model integrates the thermochemistry of the roasters and electric furnace, and predicts important process parameters such as degree of sulphur elimination in the fluid-bed roasters, matte grade, iron metallization, slag losses and the iron to silica ratio in the electric furnace slag. Both models can be used to assist process engineers and operators in calculating the addition rates of coke, flux and air for different feed scenarios
    Original languageEnglish
    Title of host publicationCelebrating the Megascale Proceedings of the Extraction and Processing Division Symposium on Pyrometallurgy in Honor of David G.C. Robertson
    Pages377-384
    ISBN (Electronic)978-3-319-48234-7
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA4 Article in a conference publication
    EventCelebrating the Megascale: Extraction and Processing Division Symposium on Pyrometallurgy in Honor of David G.C. Robertson: TMS 2014 143rd Annual Meeting and Exhibition - San Diego, CA, United States
    Duration: 16 Feb 201420 Feb 2014

    Conference

    ConferenceCelebrating the Megascale: Extraction and Processing Division Symposium on Pyrometallurgy in Honor of David G.C. Robertson: TMS 2014 143rd Annual Meeting and Exhibition
    CountryUnited States
    CitySan Diego, CA
    Period16/02/1420/02/14

    Keywords

    • Multiphase thermodynamic calculation
    • online model
    • simulation of smelting process

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