摘要
为实现垃圾填埋场腐殖土的资源化利用,以深圳某生活垃圾填埋场的腐殖土为原料替代石英砂,采用干法-湿法相结合的生产工艺制备高模数优质工业水玻璃.结果表明:该腐殖土是制备水玻璃的理想硅源,酸浸后硅胶中SiO2 含量可达 72.81%.在碳酸钠与腐殖土的质量比例为 1∶1、煅烧温度为 850℃、煅烧时间为 120 min、液固比为 8、NaOH浓度为 2%、水热温度为 160℃、水热时间为 4h的条件下,可以制得模数 3.03 的高模数水玻璃,达到GB/T 4209-2022 工业硅酸钠中工业液体水玻璃L280-41 所规定的优等品标准.
Abstract
In order to realise the resourceful use of landfill humus,the humus from a domestic waste landfill in Shenzhen was taken as the raw material to replace quartz sand,and a combination of dry and wet production process was adopted to prepare high modulus and high quality industrial water glass.The results showed that the humus was an ideal silica source for the preparation of water glass,the content of silica in the silica gel after acid leaching could reach 72.81%.When the mass ratio of sodiun carbonate to humus was 1∶1,the calcination temperature was 850℃,the calcination time was 120 minutes,the liquid-solid ratio was 8,the concentration of NaOH was 2%,the hydrothermal temperature was 160℃,and the hydrothermal time was 4 hours,the high-modulus water glass with a modulus of 3.03 could be prepared,which reached the standard of superior quality as stipulated in the industrial liquid waterglass L280-41 of GB/T 4209-2022 Sodium Silicate for Industrial Use.
维普
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