This study investigates the efficient solubility of SiO2 in rice husk ash under low concentration alkaline conditions.Firstly,single factor experiments were conducted on four factors:temperature,NaOH concentration,time,and liquid-solid ratio.Then,a combination experiment was designed using three factors:temperature,NaOH concentration,and time,with SiO2 dissolution rate as the evaluation index.The results showed that the temperature was 124℃,the mass fraction of NaOH was 8%,the time was 1.5 hours,and the liquid-solid ratio was 10:1(mL:g).Under this condition,multiple experiments have shown that the dissolution rate of SiO2 reaches 98%.This study provides technical support for the recycling and resource utilization of rice husk agricultural waste,not only turning it into treasure,but also protecting the ecological environment.
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