In the flotation separation of fluorite from calcite and celestite, the Al 2 (SO 4) 3 and acidified water glass mixed depressant increased the grade and recovery of CaF 2 in the fluorite concentrate by 13.10% and 3.58%, respectively, compared with using acidified water glass alone.

The anionic oleate and cationic amine collector adsorption theories proposed by various researchers are briefly summarized in this …

The soap made from saponified waste oil can reach the flotation concentrate grade and recovery of ca. 98% and 86% ... [86] used aniline benzylphosphonic acid as the collector in flotation of the calcite-fluorite mixture, and found that by controlling slurry pH, fluorite and calcite can be separated. Aiming at fluorite-cassiterite ...

3.1 Effect of water glass on calcium mineral separation with a fatty acid as a collector. Figure 1a shows the flotation behaviour of calcium minerals with fatty acids as the collector. With collector dosage increasing, the recovery rate of calcium minerals increases to 90%, and the recovery rates of calcite and fluorite are higher than that of scheelite.

Besides large gap between mono-mineral flotation results of fluorite and calcite, even for 1:1 mixed sample, CaF 2 grade of 80.29 % and CaF 2 recovery of 90.79 % of fluorite concentrate can be achieved with FeSO 4 ·7H 2 O (300 mg/L) and Fe 2 (SO 4) 3 (150 mg/L) used as combined depressant and NaOL (40 mg/L) as collector at pH = 6. In …

A very high-grade calcite deposit located in northern Norway consists of CaCO 3 ore with minor silicate and sulphide impurities. Cationic (Tallow-1,3-diaminopropane, Duomeen T) collector has been used in the purification of calcite by flotation with an aim of achieving calcite concentrate for its use in value-added …

Flotation is the most frequent beneficiation method for separating calcite from other minerals. The low selectivity for the calcite flotation separation is mainly …

An efficiently optimized reagent regime was investigated to improve scheelite heating flotation. The scheelite grade and recovery in the plant were significantly improved by 5% and 6%, respectively, which remarkably augmented the economic profit by $260,000 per month. The interaction mechanisms of sodium sulfide and sodium oleate with …

In this work, HPS was selected as a potential depressant for calcite in the flotation of fluorite when using NaOl as a collector. The selective separation …

Scheelite (CaWO 4), calcite (CaCO 3) and fluorite (CaF 2) are the main three calcium minerals in actual tungsten ores (Fig. 1), in which the calcite content severely restricts the flotation of scheelite in tungsten ore.Our previous studies have proven that lead complexes of benzohydroxamic acid (Pb-BHA) are efficient collector for separating …

Tungsten is an essential metal for the manufacture of special alloys, which is in constant demand due to the development of the industry. The recovery of scheelite from undeveloped tungsten ore in South Korea was investigated to improve the flotation performance for high grade and recovery of concentrate. To investigate the interaction …

The closed-circuit flotation of actual ore using mixed collector obtained scheelite concentrate of 61.09% WO3 grade with WO3 recovery of 89.49%. ... the calcite flotation was completely depressed ...

The artificial mixed mineral flotation experiment results showed that a concentrate with Cu grade of 29.01% and As grade of 7.51% was obtained, with Cu recovery of 80.20% and separation efficiency of 41.75%. ... et al., 2021, Wang et al., 2021a). Dong et al. found iron ions can greatly improve the depression of tartaric acid on calcite …

Calcite, dolomite, and silicates were the main associated gangue minerals. Apatite beneficiation was conducted using tall oil as ... was found to have a positive effect whereas vitrinite have a negative effect on combustible value and recovery of coal flotation concentrate. The effect of different dosages of frother (MIBC) and collector ...

A concentrate with a bastnaesite grade of 87.08% was obtained from the flotation test of artificially mixed ore, and the recovery of bastnaesite was 90.83%. ... most of the domestic methods for recovering fine-grained bastnaesite use flotation recovery. Calcite and other gangue minerals inevitably enter into the concentrate resulting in low ...

Calcite is activated and floated into the froth concentrate while the sericite, quartz, and other silicates are depressed and rejected into the flotation tailing. The froth from the last 2 or 3 cells of the "Sub-A" calcite flotation circuit may be recycled, if desired to maintain grade and provide a final refuse low in calcite.

In addition, the flotation results of the tailings from Jiangxi containing fluorite and calcite, indicated that the grade and recovery of fluorite increased from 87.18% and 40.99% for 0 days to 93 ...

The flotation test results showed that 60 mg/L SMKL had a significant influence on depressing calcite flotation, while it had a slight effect on scheelite flotation. Furthermore, it enhanced the WO 3 grade of the concentrate in the artificial mixed ore to 62.02% with a recovery rate of 80.37%. The contact angle and zeta potential showed that ...

In the flotation separation of fluorite from calcite and celestite, the Al 2 (SO 4) 3 and acidified water glass mixed depressant increased the grade and recovery of CaF 2 in the fluorite concentrate by …

Scheelite (CaWO 4) and wolframite ((Fe, Mn)WO 4) are the only tungsten minerals mined commercially and are mainly found in five types of deposits: skarn, vein/stockwork, porphyry, disseminated and stratabound.Gravity concentration and flotation are the beneficiation techniques most commonly applied to scheelite ore, and gravity …

In this study, the effects of hydrolytic polymaleic anhydride (HPMA) on the flotation separation of fine smithsonite from fine calcite in the Na 2 S-Pb(II)-xanthate system were investigated. The micro-flotation tests showed that the floatability of fine calcite was significantly decreased after the addition of 40 mg/L of HPMA, while only a …

Calcite Flotation Sodium carbonate Interaction mechanism 1. Introduction As an important non-ferrous raw material, zinc has wide utilization in the field of corrosion resistant …

Abstract A brief literature review on flotation of calcium-bearing minerals is given. It is found that flotation activity of a collector is connected with physisorption of the collector in particle–bubble attachment. The tests prove that physisorption decrease reduces recovery and increases the useful component content /yield ratio in the concentrate. …

For that purpose, the comminuted wollastonite-calcite ore was subjected to flotation tests, and a marketable wollastonite concentrate and a high purity CaCO 3 were produced. Calcite concentrate from the flotation test was treated with HCl to produce CaCl 2. Under the optimal conditions of a 1 mol/L HCl acid concentration, a 60 °C leaching ...

In this study, the flotation behavior, contact angle and surface adsorption of calcite were investigated in aqueous solution containing excess lattice ions (Ca2+ and CO32-). Flotation results show ...

Cationic (Tallow-1,3-diaminopropane, Duomeen T) collector has been used in the purification of calcite by flotation with an aim of achieving calcite concentrate for …

The results show that the difference in the flotation rate between scheelite and calcite was significantly increased by ultrasound-treated BHA. The grade and recovery rate of tungsten concentrate were increased and the flotation time was reduced, which resulted in the rapid separation of scheelite and calcite.

Scheelite is often associated with calcium- and magnesium-bearing minerals such as fluorite and calcite [].In the flotation process of scheelite, phosphate agents are …

This effect has been used in apatite flotation, as the addition of CO 2 results in the depression of apatite and favors calcite flotation [84], even at an alkaline pH of 8 [83]. ... [96] or to improve the fluorite concentrate grade by depressing calcite [86], [95], [97]. The main issue with acidified water glass lies in its preparation: beyond ...

The flotation recovery of these three minerals increased significantly with increasing pH, and the recovery was above 90% at pH 8–10. The adsorption. Conclusions. In this study, a new method of acid leaching and reverse flotation for fluorite concentrate was developed and applied based on mechanism analysis and bench-scale tests to …