Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101316
Title: Chemical Selection for Flocculation of the Sludges Produced During Lime Neutralization of Acidic Spent Pickling Solutions and Rinse Water from Steel Pipe Mill
Authors: Tsarev, N.
Tatyannikova, E.
Issue Date: 2020
Publisher: Knowledge E
Citation: Tsarev, N., Tatyannikova, E. (2020). Chemical Selection for Flocculation of the Sludges Produced During Lime Neutralization of Acidic Spent Pickling Solutions and Rinse Water from Steel Pipe Mill. KnE Materials Science, 6(1), 269–278. https://doi.org/10.18502/kms.v6i1.8086
Abstract: Acidic spent pickling solutions and rinse water are produced during steel pipe acid pickling. They are usually neutralised with lime in a neutralisation plant and pumped in the form of a wet sludge to a landfill. This is one of the main environmental issues of Russian steel mills. The implementation of sludge treatment units, including equipment for sludge polymer conditioning and dewatering, is an import consideration when seeking to reduce the impact of steel mills on human health and the environment. The researches results of polymer conditioning of the aggressive wastewater sludges by flocculants are reflected in the paper. Sludge samples were obtained from the neutralisation plant of an Ural’s steel pipe mill. Sludges of two types were investigated: the sludge which is formed in clarifiers during spent pickling solutions neutralization with lime and the sludge which is formed in clarifiers during rinse water neutralization with lime. During the work non-ionic, cationic, and anion flocculants Praestol® efficiency was estimated. The shortest time of water capillary suction from the flocculated sludge was accepted as efficiency criterion of flocculant processing. It was defined with use of the capillary suction timer Fann® and Whatman® 17 chromatographic paper. It is established that: non-ionic focculant Praestol® 2500 dose of 4–5 g/kg dry solids is effective for conditioning of the sludge produced during lime neutralization of acid spent pickling solutions; the anionic flocculant Praestol® 2540 dose of 1.5–2 g/kg dry solids is effective for conditioning of the sludge produced during lime neutralization of acid rinse water. The empirical response surfaces and the contour plots showing the relationship between capillary suction time and a dosage of flocculant and a charge density (% hydrolysis) of a flocculant were reveived.
Keywords: STEEL PIPE MILL
ACID PICKLING
WASTEWATER
SLUDGES
FLOCCULANTS
CAPILLARY SUCTION TIME
URI: http://hdl.handle.net/10995/101316
Access: Creative Commons Attribution License
License text: https://creativecommons.org/licenses/by/4.0/
Conference name: IV Congress “Fundamental Research and Applied Developing of Recycling and Utilization Processes of Technogenic Formations” (TECHNOGEN 2019)
Conference date: 18.06.2019-21.06.2019
RSCI ID: 44718843
ISSN: 2519-1438
DOI: 10.18502/kms.v6i1.8086
Origin: IV Congress “Fundamental Research and Applied Developing of Recycling and Utilization Processes of Technogenic Formations” (TECHNOGEN 2019). — Ekaterinburg, 2020
Appears in Collections:Междисциплинарные конференции, семинары, сборники

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