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2003•Acta Metallurgica SinicaRequires access

KINETICS OF LEACHING Ti-BEARING SLAG BY DILUTE SULPHURIC ACID

Sui Zhitong

Open publisher page 4 citations

Abstract

The kinetics of the leaching reaction for dilute sulphuric acid (20%-60%) and Ti-bearing slag at 363-383 K was investigated and the reaction may be descripted by the named unreacted-core shrinking model: l-(l-X)1/3 = kMBcAt/(rowB) = Kt. The apparent reaction order of the leaching reaction is 1.222, apparent activation energy is 87.01 kJ/mol, K may be described by K=5.090xl04 x (10.59 + l/r0)cA1.222e-10.465x103/T. The experiment results agree well with the model before achieving 90% TiO2 leaching rate.

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What this paper is about

The kinetics of the leaching reaction for dilute sulphuric acid (20%-60%) and Ti-bearing slag at 363-383 K was investigated and the reaction may be descripted by the named unreacted-core shrinking model: l-(l-X)1/3 = kMBcAt/(rowB) = Kt. The apparent reaction order of the leaching reaction is 1.222, apparent activation energy is 87.01 kJ/mol, K may be described by K=5.090xl04 x (10.59 + l/r0)cA1.222e-10.465x103/T. The experiment results agree well with the model before achieving 90% TiO2 leaching rate.

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Available abstract

The kinetics of the leaching reaction for dilute sulphuric acid (20%-60%) and Ti-bearing slag at 363-383 K was investigated and the reaction may be descripted by the named unreacted-core shrinking model: l-(l-X)1/3 = kMBcAt/(rowB) = Kt. The apparent reaction order of the leaching reaction is 1.222, apparent activation energy is 87.01 kJ/mol, K may be described by K=5.090xl04 x (10.59 + l/r0)cA1.222e-10.465x103/T. The experiment results agree well with the model before achieving 90% TiO2 leaching rate.

Key concepts: Leaching (pedology), Kinetics, Activation energy, Materials science, Order of reaction, Metallurgy, Chemical kinetics, Reaction rate

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