Waste Steel-Pickling Sulphuric Acid Removal Treated by Freezing Crystallization-Acid Retardation Coupling Technology

Jian Zhai; Chun Hua Jiang; Jian Wu

doi:10.4028/www.scientific.net/AMR.955-959.2915

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 955-959Waste Steel-Pickling Sulphuric Acid Removal...

Waste Steel-Pickling Sulphuric Acid Removal Treated by Freezing Crystallization-Acid Retardation Coupling Technology

Abstract:

Waste steel-pickling sulphuric acid was treated by freezing crystallization acid retardation coupling technology. Under the optimal conditions(temperature was -5 °C, rotational speed was 4000 rpm, TulsionA-32 as Acid Retardation reagent), the concentration of sulfuric acid reached 20～25 % and the concentration of FeSO4·7H2O fell to 15～20 g/L in the waste steel-pickling sulphuric acid which achieved the standard for sulfuric acid reuse. Polymeric ferric sulfate prepared by recyclable ferrous sulfate was accord with the first type of standard water clarfying agent polymer ferric sulfate(GB14591-2006)．

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Periodical:

Advanced Materials Research (Volumes 955-959)

Pages:

2915-2918

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.955-959.2915

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Online since:

June 2014

Authors:

Jian Zhai*, Chun Hua Jiang, Jian Wu

Keywords:

Acid Retardation, Freezing Crystallization, Waste Steel-Pickling Sulphuric Acid

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