Spectrophotometric Determination of the Ca Ion Content in Steel Slag by Using Chlorophosphonazo as the Spectral Chromogenic Reagent

Abstract:

Steel slag was carbonated and the Ca²⁺ in steel slag was also dissolving under different carbonation time and dissolution condition. As the spectral chromogenic reagent, chlorophosphonazo was used to analyze the leaching law of Ca²⁺ in steel slag. The results showed that, Ca²⁺ concentration in uncarbonated steel slag could rise from 240.79 μg/ml to 802.83 μg/ml in 120 min and Ca²⁺ concentration varied slowly after 120 min; The f-CaO in uncarbonated steel slag was 2.67%, but reduced from 2.67% to 0.88% after carbonating 3 min and reduced from 0.88% to 0.58% after carbonating 180 min; Ca²⁺ leaching concentration reduced from 102.31 μg/ml to 44.97 μg/ml after carbonating 180 time; Under the same leaching time(t=90min), the smaller the particle size, the more the leaching concentration of Ca²⁺ in steel slag.

• Periodical: Advanced Materials Research (Volumes 306-307)
• Pages: 989-993
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.306-307.989
• Online since: August 2011
• Authors: Hua Lei Zhao, Xin Cheng, Jun Chang
• Keywords: Ca²⁺ Leaching, Carbonation, Chlorophosphonazo III, Spectrophotometric Determination, Steel Slag

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