Mathematical modeling of sulfuric acid leaching of pyrite cinders after preliminary chemical activation

Ye.B. Abikak; B.K. Kenzhaliyev; Heri Retnawati; S.V. Gladyshev; A. Akcil

doi:10.31643/2023/6445.12

Authors

Ye.B. Abikak “Institute of Metallurgy and Ore Beneficiation” JSC; Satbayev University
B.K. Kenzhaliyev “Institute of Metallurgy and Ore Beneficiation” JSC; Satbayev University
Heri Retnawati Universitas Negeri Yogyakarta
S.V. Gladyshev “Institute of Metallurgy and Ore Beneficiation” JSC; Satbayev University
A. Akcil Suleyman Demirel University

DOI:

https://doi.org/10.31643/2023/6445.12

Keywords:

pyrite cinders, non-ferrous metals, model, factor, extraction

Abstract

Pyrite cinders, waste products of pyrite concentrate processing by firing to produce sulfuric acid, can serve as raw materials for the extraction of precious, ferrous, and non-ferrous metals. The paper considers the possibilities of obtaining non-ferrous metal concentrate from pyrite cinders by sulfuric acid leaching. This operation is one of the stages in the integrated technology. To increase the extraction of non-ferrous metals during leaching, the method of preliminary chemical activation was used. Chemical activation was carried out in a solution containing 40-120 g/dm³ NaНCO₃ at temperatures of 90-230 ° C and a duration of 30-300 minutes. Sulfuric acid leaching of pyrite cinder after activation was carried out in H₂SO₄solutions with a concentration of 5-20 % at a temperature of 60 ° C, duration of 30 minutes, and pulp density of 33 %. To determine the optimal conditions for the sulfuric acid leaching of pyrite cinders, a mathematical planning method was used, which allows to assess with a high degree of reliability the influence of the main factors (temperature, pulp density, the concentration of the solution NaHCO₃ and duration) and predict an increase in the efficiency of the process by analyzing the numerical values of the regression equations. As a result of sulfuric acid leaching of pyrite cinders after preliminary chemical activation under optimal conditions determined by a mathematical model, the extraction of iron and non-ferrous metals into a solution is 10-15% higher than without activation.

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Author Biographies

Ye.B. Abikak, “Institute of Metallurgy and Ore Beneficiation” JSC; Satbayev University

Junior researcher, JSC "Institute of Metallurgy and Ore Beneficiation", Satbayev University, 050010, Almaty city, the Republic of Kazakhstan, Shevchenko str., 29/133.

B.K. Kenzhaliyev, “Institute of Metallurgy and Ore Beneficiation” JSC; Satbayev University

Doctor of Technical Sciences, Professor, General Director- Chairman of the Management Board of the JSC "Institute of Metallurgy and Ore Beneficiation", Satbayev University, 050010, Almaty city, the Republic of Kazakhstan, Shevchenko str., 29/133.

Heri Retnawati, Universitas Negeri Yogyakarta

Prof. Dr., Mathematics and Science Faculty, Universitas Negeri Yogyakarta, Jl. Colombo No.1 Karangmalang Yogyakarta 55281, Indonesia.

S.V. Gladyshev, “Institute of Metallurgy and Ore Beneficiation” JSC; Satbayev University

Candidate of Technical Sciences, Leading Researcher, JSC "Institute of Metallurgy and Ore Beneficiation", Satbayev University, 050010, Almaty city, the Republic of Kazakhstan, Shevchenko str., 29/133.

A. Akcil, Suleyman Demirel University

Professor, Ph. D.-Eng., Group Leader Mineral - Metal Recovery and Recycling (MMR&R) Research Group, Engineering Faculty, Suleyman Demirel University, Çünür, Süleyman Demirel Cd., 32260 Merkez/Isparta, Turkey.

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