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Tytuł: Geochemistry, petrology and evolutionary computations in the service of archaeology: restoration of the historical smelting process at the Katowice–Szopienice site
Autor: Warchulski, Rafał
Juszczuk, Przemysław
Gawęda, Aleksandra
Słowa kluczowe: Evolutionary computations; Geochemistry; Petrology; Smelting process
Data wydania: 2018
Źródło: Archaeological and Anthropological Sciences, Vol. 10, iss. 5 (2018), s. 1023-1035
Abstrakt: Activity at the smelting plant at Katowice–Szopienice dates back to the nineteenth century. Currently, the Museum of Zinc has been funded at the site. Unfortunately, as a result of unrest during both World Wars, all technological descriptions were lost. Three historically described samples were provided by Museum of Zinc and additional slag and lining samples were collected directly from the furnace. “Enriched ore” is dominated by ZnS (89.5%) as sphalerite and wurtzite accompanied by gangue minerals. “Roasted ore” is composed mainly of zincite (74%) resulting from the oxidation of ZnS. Study has proved that “roasted ore with coke” sample description is inappropriate. It is zinc depleted and enriched in Si (22.93 wt.%), Al (9.16 wt.%), C (9.66 wt.%) and its phase composition suggest that it contains recycled lining material and coke. Such characteristics place sample as additions used for smelting process. Advanced mathematical tool, the differential evolution algorithm, was used for restoration of smelting process at the site. Algorithm proved great usefulness by providing low dispersed results for calculated compositions of loss on smelting (mainly yield) with the fitting error reduced down to 1.19 wt.%. Loss on smelting composition was dominated by Zn (41.40 wt.%), Si (9.67 wt.%) and C (9.50 wt.%). Proportion of roasted ore to addition in smelting process was estimated as 1:1.27 and loss on smelting share from batch was 62%. Geochemistry and petrology have provided rich qualitative information about the samples and smelting process, but in combination with evolutionary computations, high-quality quantitative data were obtained.
Opis: Acknowledgments This study was was supported by NCN 53 grant No. 2014/13/B/ST10/02403, entitled “Zinc and lead metallurgical slags—testing ground for investigation of behaviour of potentially toxic elements in the crystal phase structures and their interaction with environment” given to AG and supported by the grant of Centre for Polar Studies, University of Silesia, Poland—The Leading National Research Centre (KNOW) in Earth Sciences 2014-2018 given to RW
DOI: 10.1007/s12520-016-0435-8
ISSN: 1866-9557
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