Fluorite (CaF2), as an important strategic mineral source, is usually separated from calcite by the common froth flotation method, but this separation is still not selective enough. The development of a selective collector and/or depressant is the key to achieving high selective separation. 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP …

Calcite, as a common gangue mineral, exhibits a strong affinity for both anionic and cationic collectors, which adversely affects the recovery of the target minerals . The main separation process of zinc …

To verify the separation performance of smithsonite from calcite with PA, the flotation experiments of mixed minerals (the mass ratio of smithsonite and calcite was 1:1) were conducted based on the optimized conditions determined by the single mineral flotation experiments. Separation efficiency (SE) was used to evaluate the flotation ...

The purified mineral samples of celestite, fluorite and calcite were supplied by Tongliang of Chongqing city (China). To study the chemical characteristics and mineral compositions of celestite, fluorite and calcite, the chemical composition and X-ray diffractometry of these three minerals were shown in Fig. 1 and Table 1, …

Through the mixed minerals flotation, the concentrate with the 93.89% grade and 83.37% recovery of CaF 2 was achieved by adding 75 mg/L TE before the collector, confirming that the separation between fluorite and calcite could be well realized. The adsorption measurements revealed the adsorption amount of TE on the calcite surface …

Abstract. Owing to the similar surface properties of smithsonite and calcite, effective flotation separation of these two minerals is difficult in the mineral processing industry. In this study, we investigated the effect of soluble starch (SS) as a depressant …

Bastnaesite is an important mineral resource, usually associated with calcite and other minerals, flotation is one of the most widely used methods in the selection process. Collector is the key to achieve flotation separation of …

An interesting separation of calcite and other minerals at pH values near 4 has been demonstrated. Despite the fact calcite begins to dissolve itself at pH values below 4, the pK a of the carboxylic functions of sulphosuccinamate is approximately pH 7.6. At pH 4, the main form of the carboxylic function of sulphosuccinamate is the molecular form.

Advancing phosphate ore minerals separation with sustainable flotation reagents: An investigation into highly selective biobased depressants ... depression effect on apatite, calcite, dolomite, and quartz in different mineral systems. As illustrated in this table, calcite is the mineral that has been more studied among the four minerals and ...

Fluorite is an important strategic mineral. In general, fluorite ores will contain a certain amount of calcite gangue mineral. Thus, they need to be separated from each other. For an economic separation, a reverse flotation process is used to float calcite gangue from fluorite. However, little information on the separation is available. In this …

At present, the research on flotation separation of cassiterite and gangue minerals is mainly focused on the development of new collectors or depressants, while the research on combined depressants is rare. In this study, the flotation separation of cassiterite and the typical gangue mineral, calcite, was investigated using the metal …

Owing to the depletion of wolframite, the focus of tungsten extraction has gradually shifted to scheelite. However, separating the associated minerals (e.g., apatite, fluorite, and calcite) and scheelite is challenging because their surface physicochemical properties are similar to those of scheelite. Fortunately, researchers have made …

The combination of Fe 2+ /Fe 3+ sulfate was used as selective depressant for the flotation separation of fluorite and calcite.. Ferrous and ferric species were in-situ generated on calcite surface to hinder the adsorption of NaOL. • Fluorite concentrate with CaF 2 grade of 80.29 % and recovery of 90.79 % was obtained using 1:1 mixed minerals.

Key words: scheelite; calcite; separation enhancement; sodium oleate; metal-inorganic complex depressant. 1 Introduction . Scheelite is rich in resources and has a low grade. It generally coexists with other calcareous gangue minerals [1]. The difficulty in the scheelite flotation is the separation of scheelite from calcium- bearing gangue ...

The flotation separation (FS) of both scheelite and calcite minerals with similar physicochemical properties remains challenging, since the Ca active sites exist on their surfaces. The present work investigated the effects of different addition points of MnCl2 on the FS of scheelite and calcite by micro-flotation tests, zeta potential measurements, …

a good synergistic effect on the separation of smithsonite, calcite, and dolomite when used as combined collectors, so it is important to clarify the adsorption …

The Egyptian Mineral Resources Authority (EMRA) delivered pure apatite and calcite minerals. The samples were ground to a fineness of less than 0.100 mm in a porcelain mill. Desliming was used to remove fine fractions ( 0.075 m). The sodium N-lauryl sarcosinate (SNLS) used in this study had a purity of 95% and was supplied by Shanghai …

In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface …

Calcite occurs in nature either as high-grade (with >75% calcite) or low-grade calcite ores (with <30% calcite). Generally other carbonate, phosphate, silicate, and iron sul …

However, selective separation of fluorite and calcite minerals with an anionic collector could be realized by adopting different depressant systems. Tannic acid (TA) is a well-known organic depressant that has received considerable attention in many fields. TA is a type of high-molecular-weight polyphenol that can be found in different …

A series of our single mineral flotation tests prov ed that reverse flotation separation of fluorite. from calcite can be achieved by using a novel re agent scheme of 3 × 10 − mol/L of HEDP and ...

The separation effect was remarkable, making SS a new and efficient depressant for mineral separation. However, the application of SS and its mechanism of action in the flotation separation of smithsonite and calcite have not been reported yet. ... After crushing the ore, it was screened for high-purity smithsonite and calcite minerals, …

The flotation results of single and binary mixed minerals showed that the mixture of Pb, BHA and NaOL (molar ratio 6:6:1) exhibited excellent separation selectivity for scheelite and calcite at pH ...

The flotation separation of celestite with calcium-containing minerals, fluorite and calcite, is realized by adopting the depressant EDTA and the collector SDS. Flotation experiments, zeta potential experiments, adsorption experiments, dissolution experiments, FTIR analysis and XPS analysis are conducted to elucidate the underlying …

The flotation separation of Cu-Fe sulfide minerals at low alkalinity can be achieved using selective depressants. In the flotation system of Cu-Fe sulfide minerals, depressants usually preferentially interact with the pyrite surface to render the mineral surface hydrophilic and hinder the adsorption of the collector. This review summarizes …

ABSTRACT. Depressants are essential additives in the flotation separation of scheelite-calcite minerals. However, traditional inorganic depressants such as sodium silicate have the disadvantages of high dosage, environmental pollution, and being non-efficient, which leads to a growing interest in eco-friendly and effective organic alternatives.

In this study, in light of the poor selectivity of single copper ions (Cu 2+) and poor inhibition ability of citric acid (CA), the flotation separation effect of mixed depressant Cu 2+ /CA on scheelite and calcite was explored. The microflotation experiment showed that the mixed depressant had better separation effects on the two minerals than the …