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.