— Beneficiation by Flotation of feldspar is well established. It is a simple matter by flotation to remove the contaminating impurities and keep the alumina (Al2O3) content at 19% even on low grade feldspar ores. Dry recovery methods are economically limited to about 17% Al2O3.

 — This study demonstrates a high froth flotation separation selectivity between quartz and feldspar and that quartz can be readily floated in diluted HF solutions with several frothers. A comparative study was conducted between different chemical reagents with low consumption of modifier dosage of HF for high recovery.

A novel green cationic surfactant Poly (propylene glycol) bis (2-aminopropyl ether) (PEA) with multiple amine groups was utilized as a collector for flotation separation of quartz from feldspar-quartz associated ore (FQA) without acid (particularly, HF) and alkali.

Nowadays, the most efficient process for Kfs flotation from quartz applies amine as a collector in acidic conditions produced by HF acid [14,15]. Feldspar is floated from a feldspar–quartz binary mixture using HF acid, which acts like an activator and cationic collector (amine) at pH 2–3 [16].

 — This study demonstrates a high flotation separation selectivity between quartz and different types of feldspar, and that quartz can be readily floated from feldspar in diluted solutions of hydrofluoric acid (HF) by the aid of a frother.

 — Quartz and feldspar cannot be efficiently separated using physical methods owing to their similar physicochemical properties. In recent years, flotation has emerged as the most effective method for separating feldspar and quartz (Larsen and Kleiv, 2016, Shu et al., 2020, Xu et al., 2020).

Flotation is a physicochemical process that is used for the separation of hydrophobic particles from hydrophilic ones. This method is widely used in mineral processing for the selective separation of valuable minerals. It is also …

 — Froth flotation experiments on a Qtz–Kfs mixture showed that quartz could be selectively floated from Kfs in diluted hydrofluoric acid (HF) using a frother. Similarly, feldspar could be...

 — The selective separation mechanism of feldspar and quartz was revealed by flotation experiments, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and contact angle analysis. These experiments show that SF can effectively achieve the flotation separation of feldspar and quartz.

 — This paper reviews the application of flotation for the separation of feldspar from the other minerals with which it naturally occurs (such as quartz, clay minerals, mica, ilmenite, rutile, anatase and magnetite) as well as the separation of the individual feldspar minerals themselves.