Influence of thermal treatment on the kinetics of manganese leaching from laterite ore
摘要
Ni extraction from laterite ore has progressively intensified via various hydrometallurgical methods. One of the by-products of the leaching process is Mn, which can increase the resilience of this metal supply on the market. By observing the effects of the laterite roasting temperature and the effects of the Mn leaching temperature and duration, we can obtain insight into the coextraction of Mn from laterite leaching. Roasting was carried out at 280 and 610 °C, whereas leaching experiments were conducted at 30–90 °C for 0–120 min. The leaching efficiency of Mn increased with increasing roasting temperature, leaching temperature, and leaching duration. The optimum leaching conditions were obtained using a 280 °C roasted sample at a leaching temperature of 90 °C for 90 min. Under these conditions, the Mn leaching efficiency reached 95.5%. Roasting also affects the Mn leaching kinetics parameters, and increasing the roasting temperature results in an increase in the Ea value of the leaching process.