Abstract Scope |
A new type of humic acid-based binder was tested as a substitute for bentonite to prepare qualified vanadium-titanium magnetite oxide pellets. The results show that there is strong chemical adsorption between the organic functional groups in the humic acid-based binder and the vanadium-titanium magnetite particles, which improves the strength of the green pellets. The thermal decomposition process of the humic acid-based binder will adversely affect the compressive strength and microstructure of the preheated pellets, but it has better thermal stability than other organic binders. Compared with bentonite binder, the microstructure of oxidized pellets is denser, and the recrystallization of the Fe2O3 crystal grains is better. Therefore, use the same quality of humic acid-based binders as other organic binders can replace 2% of bentonite, and contain more than 1% total iron. The results show that humic acid-based binders are promising and can effectively replace bentonite and other organic binders. |