摘要
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.
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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2008年第10期2687-2691,共5页
CIESC Journal
基金
国家重点基础研究发展计划项目(2007CB613603)~~
关键词
红土镍矿
碱熔融
白炭黑
碳酸化分解
laterite nickel ore
molten alkali
silica white
carbonation decomposition
