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Industrial Verification and Research Development of Lime–Gypsum Fertilizer Granulation Method

This work concerns non-pressure granulation of mineral materials used for the production of agricultural fertilizers for soil deacidification. In order to expand the product range of Nordkalk Poland sp. z o. o. located in Poland, the granulation conditions of the gypsum–lime mix were examined with t...

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Published in:Minerals (Basel) 2021-02, Vol.11 (2), p.119
Main Authors: Siuda, Robert, Kwiatek, Jerzy, Szufa, Szymon, Obraniak, Andrzej, Piersa, Piotr, Adrian, Łukasz, Modrzewski, Remigiusz, Ławińska, Katarzyna, Siczek, Krzysztof, Olejnik, Tomasz P.
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cited_by cdi_FETCH-LOGICAL-c270t-1e0970def2bcf4c4bb47a83c040d6f9726172196bae2e3268282f94211a376223
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container_issue 2
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container_title Minerals (Basel)
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creator Siuda, Robert
Kwiatek, Jerzy
Szufa, Szymon
Obraniak, Andrzej
Piersa, Piotr
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Ławińska, Katarzyna
Siczek, Krzysztof
Olejnik, Tomasz P.
description This work concerns non-pressure granulation of mineral materials used for the production of agricultural fertilizers for soil deacidification. In order to expand the product range of Nordkalk Poland sp. z o. o. located in Poland, the granulation conditions of the gypsum–lime mix were examined with the use of various granulation methods. The processed mixture was Jurassic lime flour mined in the Sławno mine (Poland) and waste gypsum (sulfogypsum) obtained from the largest coal-fired power plant in the EU, Bełchatów Power Plant (Poland). This paper presents the results of the optimization of the gypsum–lime fertilizer granulation process. The results of the study of granulation of gypsum–lime mixture realized in one-stage technology in a disc granulator were compared with the effects of two-stage agglomeration. During the research, a mixture (in a 1:1 ratio) of waste sulfogypsum and lime flour was used. Such a weight ratio provides maximum use of the sulfogypsum waste while maintaining good mechanical properties of the granulate. The granulated bed was moistened with a lignosulfonate solution. The process was carried out periodically. After the experiment, the grain composition of the granulate obtained was determined and tests were performed to determine the strength of the product. The test results were compared with analogous ones obtained during granulation with the use of molasses (waste from sugar production). The results obtained were verified during a trial carried out on an industrial scale.
doi_str_mv 10.3390/min11020119
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