NDLI: Application of Waste Engine Oil for Improving Ilmenite Flotation Combined with Sodium Oleate Collector

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Application of Waste Engine Oil for Improving Ilmenite Flotation Combined with Sodium Oleate Collector

Content Provider	MDPI
Author	Yu, Qingyao Tian, Fuqiang Cao, Yijun Fan, Guixia Hao, Haiqing Peng, Weijun Zhou, Guoli Li, Peng
Copyright Year	2021
Description	Collectors commonly have synergetic effects in ores flotation. In this work, a waste engine oil (WEO) was introduced as a collector to an ilmenite flotation system with sodium oleate (NaOL). The results show that the floatability of ilmenite was significantly improved by using WEO and NaOL as a combined collector. The recovery of ilmenite was enhanced from 71.26% (only NaOL) to 93.89% (WEO/NaOL combined collector) at the pH of 6.72. The optimum molar ratio of NaOL to WEO was about 2.08 to 1. The WEO and NaOL also have synergetic effects for the collection of ilmenite, because to obtain the ilmenite recovery of 53.96%, the dosage of 45 mg/L NaOL is equal to 38.56 mg/L WEO/NaOL combined collector (30 mg/L NaOL + 8.56 mg/L WEO). In other words, 15 mg/L of NaOL can be replaced by 8.56 mg/L of WEO. It is an effective way to reduce the dosage of the collector and reuse WEO. Therefore, it is a highly valuable and environmentally friendly approach for WEO reuse. WEO mainly consists of oxygen functional groups, aromatics, and long-chain hydrocarbons, especially for the $RCONH_{2}$ and RCOOH, thereby forming a strong interaction on the ilmenite surface. The adsorption mechanism of waste engine oil and sodium oleate on the ilmenite surface is mainly contributed by chemical adsorption. Therefore, WEO exhibits superior synergistic power with NaOL as a combined collector. Herein, this work provided an effective collector for ilmenite flotation and a feasible approach for reducing NaOL dosage and recycling WEO.
Starting Page	1242
e-ISSN	2075163X
DOI	10.3390/min11111242
Journal	Minerals
Issue Number	11
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-11-09
Access Restriction	Open
Subject Keyword	Minerals Water Science and Technology Ilmenite Flotation Waste Engine Oil Combined Collector Adsorption Mechanism
Content Type	Text
Resource Type	Article

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