Kinetics study of carbon raiser on the reduction of nickel laterite from Pomalaa, Southeast Sulawesi

2nd International Conference on Chemical Engineering (ICCE) UNPAR

Petrus, H.T.B.M.^1 ; Rhamdani, A.R.^1 ; Putera, A.D.P.^1 ; Warmada, I.W.^2 ; Yuliansyad, A.T.^1 ; Perdana, I.^1

Center of Advanced Material and Mineral Processing, Department of Chemical Engineering, Universitas Gadjah Mada, Jl. Grafika 2, Bulaksumur, Yogyakarta

55281, Indonesia^1

Department of Geological Engineering, Universitas Gadjah Mada, Jl. Grafika 2, Bulaksumur, Yogyakarta

55281, Indonesia^2

关键词: Diffusion model;    Kinetics studies;    Nickel laterite;    Nickel laterite ores;    Nickel pig irons;    Oil industries;    Particle geometries;    Reduction atmospheres;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/162/1/012019/pdf
DOI  :  10.1088/1757-899X/162/1/012019

来源: IOP

【 摘 要 】

As one of the top ten on nickel laterite ore resources in the world, Indonesia must have been initiating the nickel processing in total amount of about 1.5 million tonnes. In regard to the low nickel laterite processing, one of the possible product is nickel pig iron (NPI) needed for the stainless steel industries. In this study carbon raiser that is waste from oil industries was used to replace metalurgical coke. The kinetic of nickel laterite reduction using carbon raiser was studied and compared with anthrasite coal. In this work, the author conducted the reduction of nickel laterite ores by both carbon raiser and anthrasite coal as reductant, in air and CO2atmosphere, within the temperature ranged from 800°C and 1000°C. Two models were applied, sphere particle geometry model and Ginstling-Brounhstein diffusion model, to study the kinetic parameters. The results indicated that type of reductants and reduction atmosphere greatly influence the kinetic parameters. The obtained values of activation energy were varied between 17.44-18.12 kcal/mol.