Abstract
Producing a certain amount of liquid phase is crucial for the growth and aggregation of ferronickel particles during reductive roasting of laterite ore in the Krupp–Renn process and for mineralization of the ore during its sintering to enhance the sinter output and quality. In this chapter, the effects of the flux addition, roasting temperature and atmosphere on the phase transformation and softening–melting properties of laterite ore were studied and the correlation between phase transformation and softening–melting properties was ascertained. Thereafter, the corresponding regulation technology of softening–melting performance of laterite ore based on the quaternary basicity control was proposed. The efficiencies of the regulation technology applied in the Krupp–Renn process and sintering process were also verified.
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