Sodium carbonate is widely used as pulp dispersant in bauxite flotation in China. Its key roles are pH adjusting, pulp dispersing and eliminating of calcium ions. The influences of Ca 2+ and Mg 2+ ions on the dispersion of individual minerals were investigated when sodium carbonate and sodium tripolyphosphate were used as …Web

Many pH regulators, such as sodium hydroxide (NaOH) and sodium carbonate (Na 2 CO 3) [3, 144], can be used for fluorite flotation. Some studies [ 145, 146 ] found that sodium carbonate was more effective than sodium hydroxide and proposed that the addition of sodium carbonate increases the content of CO 3 2−, limiting the content …Web

Hydrochloric acid (HCl) and sodium carbonate (Na 2 CO 3) were used as pH regulators. Sodium hexametaphosphate (SH), sodium silicate and starch were used as representatives of inorganic and organic depressants. Sodium oleate (NaOL) was used as the collector. All reagents are of analytical grade. Deionized water was used. Flotation …Web

Sodium carbonate aqueous solution shows weak alkalinity, pH value between 8 and 10. In separating lead–zinc sulfide ore using priority flotation, galena inhibits sphalerite and pyrite when pulp pH adjustment between 8 and 10. Using sodium carbonate instead of lime can keep the pulp's pH stable and avoid the inhibition of Ca 2+ on lead ...Web

The micro-flotation tests show that the molar ratio of the mixed collectors, the dosages of calcium chloride, sodium hydroxide and sodium carbonate, pulp temperature are crucial factors affecting the recovery of spodumene. An optimal molar ratio 9:1 of NaOL and DTAC is found. Sodium hydroxide (NaOH) has to be used as a pH regulator.Web

The reagents used in the flotation conditioning step were sodium carbonate (Na 2 CO 3), sodium hydroxide (NaOH), and calcium chloride (CaCl 2) as regulators, and sodium oleate (NaOL) as collector. All reagents used in the batch flotation were of industrial grade. Both collector and regulators were diluted in water to a concentration of …Web

Add sodium hydroxide and calcium ions to the ore for activation, and then use fatty acid soap to mix flotation spodumene-beryl, and use sodium carbonate, sodium hydroxide and acid, alkaline water …Web

Through batch flotation testwork on a skarn scheelite ore, single mineral flotation and contact angle measurements, this article aims at demonstrating that sodium carbonate is a multi-faceted ...Web

The micro-flotation tests show that the molar ratio of the mixed collectors, the dosages of calcium chloride, sodium hydroxide and sodium carbonate, pulp temperature are crucial factors affecting the recovery of spodumene. An optimal molar ratio 9:1 of NaOL and DTAC is found. Sodium hydroxide (NaOH) has to be used as a pH regulator ...Web

The addition of sodium carbonate strengthens the carrier flotation of scheelite and therefore improves the scheelite recovery. Furthermore, the addition of sodium …Web

Calcite surface hydrophobicity is significantly reduced when calcium chloride and sodium carbonate were added before the depressant addition and decreased the contact angle from 75 to 9.0°, ... For the flotation of REMs, sodium silicate, disodium sulfide, and sodium oxalate can be used for calcite depression [126, 127].Web

In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface properties of both calcium minerals to the …Web

Role of sodium carbonate in scheelite flotation—A multi-faceted reagent [J] Miner Eng, 129 (2018), pp. 120-128. View PDF View article View in Scopus Google Scholar. 2. Chen ZHAO, Chuan-yao SUN, Wan-zhong YIN, Bin-bin LUO. An investigation of the mechanism of using iron chelate as a collector during scheelite flotation [J]Web

The recovery of scheelite from calcium-bearing carbonate ores by flotation is challenging due to its low separation efficiency. This study investigated the effect of pentasodium …Web

3 rowsIn this study, sodium carbonate was used as a regulator to improve the flotation separation of ...Web

Flotation tests were conducted on high purity single minerals of carbonate (calcite and dolomite) and sulfide (pyrite and chalcopyrite), and their mixtures, using sodium oleate as a collector and thioglycollic acid and citric acid as sulfide mineral depressants.Web

Acidified water glass in the selective flotation of scheelite from calcite, part II: species in solution and related mechanism of the depressant. Sodium silicate is one of the main depressants against calcite and fluorite in the scheelite flotation industry. In the first part of this article, the authors acidified sodium silicate (AWG) with….Web

In this study, the influence mechanism of sodium carbonate on the flotation separation of smithsonite and calcite by the sulfuration-amine method was …Web

The flotation was carried out on the 1.5L, 1L, and 0.5L XFD single tank frequency conversion flotation machine. A total of 250-g sample was used in each test, and the PH of the solution was adjusted by sodium carbonate or sulfonate acid. Inhibitors and collecting agents were added in sequence.Web

Sulfuration-amine flotation is the most commonly used method to separate zinc oxide ore, but its shortcomings such as unstable separation index and poor applicability to high mud-content raw ore limit its application in industry. In this study, the influence mechanism of sodium carbonate on the flotation separation of smithsonite and calcite …Web

As suggested from the results of pure mineral and binary mixed minerals flotation tests, scheelite and calcite could be effectively separated in the case of slurry pH of 6 ∼ 12, sulfonated brown coal dosage of 7 mg/L and sodium oleate dosage of 50 mg/L. Sulfonated brown coal showed high effectiveness in selectively inhibiting calcite.Web

Even though sodium carbonate is a reagent frequently used in flotation, its role is mostly described as a buffering pH modifier and a pulp dispersant. In the case of …Web

Sodium carbonate is not only a pH modifier but also can be used as a dispersing agent. In this paper, the amount of sodium carbonate was expressed as pH value. Hence, the effect of pH on the flotation recovery of calcite and smithsonite was investigated, and results were shown in Fig. 5. The dosages of SL, CBC, and Zn(II) were …Web

ChEBI. Sodium Carbonate is the disodium salt of carbonic acid with alkalinizing property. When dissolved in water, sodium carbonate forms carbonic acid and sodium hydroxide. As a strong base, sodium hydroxide neutralizes gastric acid thereby acting as an antacid. DrugBank; NCI Thesaurus (NCIt) See also: Carbonate Ion (has active moiety); Citric ...Web

The role of sodium carbonate is therefore not limited to precipitating and limiting calcium and magnesium ions in the pulp or to buffering pH, and not just improving flotation performance but also selectivity against gangue minerals, especially calcite. A flotation involving semi-soluble salt type minerals such as scheelite, calcite, fluorite ...Web

The flotation separation of magnesite from calcium-containing minerals has always been a difficult subject in minerals processing. This work studied the inhibition effects of carboxymethyl cellulose (CMC), sodium lignosulphonate, polyaspartic acid (PASP) and sodium silicate on flotation behaviors of magnesite, dolomite and calcite, providing …Web

Acidified water glass in the selective flotation of scheelite from calcite, part II: species in solution and related mechanism of the depressant. Sodium silicate is one of …Web

A study of the interaction of phospholan PE65 with sodium oleate during flotation of the apatite ore is the purpose of this work. The results of the study will allow us to predict the use of organophosphorus reagents in conjunction with classical collectors─fatty carboxylic acids. ... Carbonate ions (1 × 10-3 mol L-1 Na2CO3) do not …Web

Flotation recovery of pyrite and arsenopyrite in the presence of copper ions and sodium carbonate as a function of the sodium humate concentration. C(NaBX) = …Web

The beneficiation plant flotation reagent scheme: sodium carbonate as pH regulator, sodium hexametaphosphate and water glass salified with aluminum sulfate as depressants and oleic acid as collector. The application of a combined depressant of sodium hexametaphosphate and modified water glass can greatly improve the …Web

Full Article. The Effects of Sodium Percarbonate and Perborate Usage on Pulping and Flotation Deinking Instead of Hydrogen Peroxide. Emrah Pesman, a Sami Imamoglu, a, * Evren Ersoy Kalyoncu, b and Hüseyin Kırcı b The main objective of this study was to evaluate the potential of sodium percarbonate and sodium perborate utilization during …Web

Among all the depressants studied, the combination of sodium carbonate and sodium silicate achieved the best flotation depression effect. Based on the above research, Wei et al. mixed Al 3+ with water glass and found that compared to water glass, the Al-water glass exhibited less adsorption on scheelite but more adsorption on calcite.Web

Sodium carbonate was frequently employed as a pH adjuster and dispersant in flotation aqueous system [13,23]. In addition, the use of sodium carbonate with sodium silicate showed synergistic effects and improved the depression of complex calcium gangue minerals [ 24, 25, 26 ].Web

The optimal closed-circuit flotation test flowsheet (Fig. 1) was designed based on the results of single-factor condition experiments.It is particularly pointed out that adding sodium carbonate (Na 2 CO 3) before ball milling is to increase the possibility of copper-bearing mineral liberation from gangue minerals [6].The balance results after five cycles …Web