Optimization research and application of settling tank in the separation and washing process of alumina production using fly ash acid method
In the process of extracting alumina from fly ash by"One-step acid dissolution method",the effect of settling separation in settling tank directly affects the productivity of subsequent process.In this paper,starting with the concentration screening of settling tank,the structure of settling tank is opti-mized on the basis of determining the best concentration of settling tank.The verification test results confirm that the improved settling tank significantly improves settling efficiency and separation efficiency.After the application of the forced system,the content of overflow suspended solids is reduced by 18.92 mg/L,and the bottom flow solid content is increased by 50.25 g/L;The setting of flocculant addition points can also affect the settling and separa-tion effect.Choosing an appropriate flocculant addition point can force dilution,reduce the content of suspended solids by 1.42 mg/L,and increase the bottom flow solid content by 13.16 g/L,thus significantly improving the separation efficiency of the settling tank in the separation and settling step.
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维普
