关键词:

红土镍矿, 碱熔融, 白炭黑, 碳酸化分解

Abstract:

Silica white was prepared with the method of molten NaOHcarbonation decomposition from the laterite nickel ore, and the content of NiO in the residue reached 2.71%The results showed that the extraction ratio of SiO₂ increased with increasing reaction time and mass ratio of alkali to ore, and with decreasing particle size of the laterite nickel oreFurthermore, the extraction ratio of SiO₂ increased firstly and then decreased with increasing reaction temperatureXRD analysis indicated that the product was amorphousFT-IR analysis indicated that the product was hydrated silicon dioxideSEM morphology showed that the product was of uniform particle size with average particle size about 100 nmThe physical and chemical properties of the product conformed with the national standards of chemical industry.

Key words:

红土镍矿, 碱熔融, 白炭黑, 碳酸化分解