Statistical Analysis and Optimization of Reverse Anionic Hematite Flotation Integrated with Nanobubbles

Abstract

The low-grade refractory hematite in Anshan, China is fine disseminated in a huge reserve and its flotation performance is often not satisfactory. In this study reverse flotation experiments statistically designed using Box-Behnken method were carried out with a mechanical flotation cell integrated with nanobubbles and the results were analyzed according to response surface methodology to evaluate the effects and interactions of three independent critical process parameters, i.e., dosages of hematite depressant starch, quartz activator lime, and collector TD-II used in the reverse hematite flotation in the presence of nanobubbles. The results show that with changing for example the starch dosages, nanobubbles improved the iron grade by up to 15% and iron recovery by 10–30%. In addition, TD-II collector and starch had the most significant impact on concentrate iron grade and recovery whereas lime had no direct independent effect over the examined dosage range. The maximum Fe recovery was determined to be 84.73% at a grade of 67.92% at the optimum conditions of 3 kg/t starch, 1.5 kg/t lime, and 0.78 kg/t TD-II collector. The verification tests at optimum conditions established from the contour plots produced approximately the same grade and recovery as statistically predicted.

Department(s)

Mining Engineering

Keywords and Phrases

Hematite; Nanobubbles; Optimization; Reverse flotation; Statistical design

International Standard Serial Number (ISSN)

0892-6875

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Elsevier, All rights reserved.

Publication Date

15 Mar 2021

Link to Full Text

Share

 
COinS