Abstract

HPAL (High-Pressure Acid Leaching) is one of the important technologies for extracting nickel and cobalt from nickel laterite ore. In the next few years, some plants using this technology will be operated in Indonesia. The production will be estimated to be 543,000 tons per year by 2025. On the other hand, HPAL will produce more than 26 million tonnes of residue, and it requires good management. The residue utilization for certain industrial raw materials is one of the solutions. To determine the potential utilization residue, the characteristic of the residue must be elaborated through some methods. The characterization is carried out based on mineralogical and chemical properties. The feed used in the HPAL process dominates with magnetite and goethite with 41,15 % Fe and 1,35 % Ni content. The residue of HPAL contains Fe and significant Sulphur content, silica, aluminium and calcium. The quantity of Sulphur must be decreased by the desulfurization method then followed by the reduction process. The analysis shows that HPAL residue is still required additional processing for reducing the Sulphur content. The residue utilization trial still needs to be done to determine the quality of the iron-making products produced produced.

Highlights

  • The battery in an electric vehicle is one of the solutions in global warming prevention sourced from the combustion of fossil fuels

  • Indonesian Government efforts have been realized by identification industry needs for accelerating battery-based electric motor vehicles

  • The data collected will be to support the research that will be carried out related to High-pressure acid leaching (HPAL) residue as iron raw materials

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Summary

Introduction

The battery in an electric vehicle is one of the solutions in global warming prevention sourced from the combustion of fossil fuels. In the years, Indonesia will have some nickel processing plants involving a high-pressure acid leaching method. These plants produce nickel and cobalt-based products for feeding battery plant manufacturers. If the battery is a solution to solve the problem of environmental pollution due to fossil fuels, the principle of clean technology must be applied in the electric battery process due to the waste products from the HPAL. Some plants use DSTP (Deep Sea tailing displacement) techniques as a solution to dispose of the waste. High-pressure acid leaching (HPAL) is one method for recovering nickel and cobalt at a certain temperature using Sulphuric acid. Due to two previous accidents, the use of residue generated by the HPAL process may be the best solution to be realized

Research Method
Characteristic of Limonite
Characteristic of residue
Desulfurization
Findings
Iron Reduction
Conclusion
Full Text
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