正交试验法研究废铅膏在柠檬酸钠水溶液中的溶解行为

The study of dissolution behavior of scrap lead paste in sodium citrate aqueous solution by orthogonal experiment

废铅膏在柠檬酸钠水溶液中可有效脱硫,但废铅膏在其中的溶解率过大会影响其脱硫效果,因此,在脱硫研究过程中考虑溶解率是十分必要的。本文主要采用正交试验以及极差分析法来研究该问题。室温下,如果柠檬酸钠水溶液中ω(柠檬酸钠)=8.3%,废铅膏在其中的溶解率为13.32%。通过极差分析判断出各因素(溶解温度、溶解时间及水溶液中柠檬酸钠所占的质量分数)对溶解率的影响程度。试验结果显示:影响溶解率最大的因素为柠檬酸钠的质量分数,其次是溶解温度,溶解时间为最小的影响因素。在20℃、ω(柠檬酸钠)=25%的柠檬酸钠水溶液中溶解60 min可以得到试验组中最低的溶解率。

The desulphurization processes of scrap lead paste can be effectively finished in sodium citrate aqueous solution, but the larger dissolution ratio of scrap lead paste will affect desulphurization result. Therefore, it is very necessary to take into account the dissolution ratio of scrap lead paste in sodium citrate aqueous solution. Dissolution processes have been studied by orthogonal experiment and range analysis in this paper. The dissolution rate is 13.2 % in 8.3 wt% sodium citrate aqueous solution at room temperature. The effect degrees of dissolution temperature, dissolution time and concentration of sodium citrate aqueous solution have been researched by range analysis method. The first influence factor is concentration of sodium citrate aqueous solution, the second is dissolution temperature and the minimum factor is dissolution time. If the scrap leads paste is dissolved 60 mix at 20 ℃, its dissolution ratio is lowest in the experimental group.