Kinetic study of nickel laterite reduction roasting by palm kernel shell charcoal

International Conference on Biomass: Technology, Application, and Sustainable Development

生物科学;能源学;经济学

Sugiarto, E.^1,2 ; Putera, A.D.P.^2 ; Petrus, H.T.B.M.^1,2

Chemical Engineering Department, Faculty of Engineering, Universitas Gadjah Mada, Jl Grafika 2, Sleman, Daerah Istimewa Yogyakarta, Indonesia^1

Center of Advanced Material and Mineral Processing, Universitas Gadjah Mada, Jl Grafika 2, Sleman, Daerah Istimewa Yogyakarta, Indonesia^2

关键词: Carbon emissions;    Conventional methods;    Kinetic modeling;    Nickel laterite;    Nickel pig irons;    Palm kernel shells;    Reduction mechanisms;    Reduction roasting;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/65/1/012027/pdf
DOI  :  10.1088/1755-1315/65/1/012027

学科分类：生物科学（综合）

来源: IOP

【 摘 要 】

Demand to process nickel-bearing laterite ore increase as continuous depletion of high-grade nickel-bearing sulfide ore takes place. Due to its common nickel association with iron, processing nickel laterite ore into nickel pig iron (NPI) has been developed by some industries. However, to achieve satisfying nickel recoveries, the process needs massive high-grade metallurgical coke consumption. Concerning on the sustainability of coke supply and positive carbon emission, reduction of nickel laterite ore using biomass-based reductor was being studied.In this study, saprolitic nickel laterite ore was being reduced by palm kernel shell charcoal at several temperatures (800-1000 °C). Variation of biomass-laterite composition was also conducted to study the reduction mechanism. X-ray diffraction and gravimetry analysis were applied to justify the phenomenon and predict kinetic model of the reduction. Results of this study provide information that palm kernel shell charcoal has similar reducing result compared with the conventional method. Reduction, however, was carried out by carbon monoxide rather than solid carbon. Regarding kinetics, Ginstling-Brouhnstein kinetic model provides satisfying results to predict the reduction phenomenon.