| Autor: |
Palit, Christin, Suliestyah |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2021, Vol. 2363 Issue 1, p1-9, 9p |
| Abstrakt: |
This paper is one of a study that implements reverse flotation methods as an alternative beneficiation on bauxite processing. This study is aimed at decrease silica content and increase alumina content in bauxite so its qualified as feed of Bayer Process. The experiments were carried out in a 1375 mL of flotation cell tank. Dodecylamine (DDA) and AERO 3000C were used as the collector, starch as the depressant, and Dowfroth 1012 as frother. The overall experiments were conducted on solid content to solution 25% w/w. Alumina content and silica content as results of flotation were analyzed by XRF. The results of XRF of flotation products show that increasing of alumina content and decreasing of silica content. The optimum pH range of bauxite flotation using DDA and AERO 3000C as collectors can be achieved at pH 4 – 10. From the results, flotation performance using DDA is better than AERO 3000C because get higher Al2O3 content, 61.4%. The increasing of collector dosage at pH 10 gives a good result on Al2O3 content is 62% and SiO2 is 29.4% with 50.44% recovery of Al2O3 obtained at dosage of collector at 500 g/ton. The Al2O3 ontent which is higher in conditions without the addition of depressant is 66.8% while SiO2 in 23.5%. While for the size fraction variation, it shows that separation is better in the finer particle which gives an increasing of alumina and decreasing of silica as a result. The best condition in this study was achieved by 400 g/ton of DDA dosage, 400 g/ton of depressant dosage and size fraction of particle in -325 mesh at pH 10 with increasing alumina to 79.1% and decreasing silica to 8.89%. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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