The development of scheelite flotation reagents in the future is envisioned, aiming at achieving efficient flotation enrichment of scheelite, reduce production costs and reduce …
DetailsConsequently, the selective separation of scheelite from calcite is crucial for the efficient use of scheelite resources. Flotation is widely employed as a technique for separating scheelite from calcite [4], [5]. Sodium oleate is frequently utilized as a collector in scheelite flotation [6], [7], yet its selectivity is limited [8], [9].
DetailsSilicate removal from scheelite flotation wastewater by flue gas desulphurisation waste (FGD gypsum) has been investigated. Systematic laboratory-scale experiments were conducted to evaluate silicate removal and formation mechanism of calcium silicate. Precipitation test results showed that silicate removal reached 90% at …
DetailsThe 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%.
DetailsIntroduction. Tungsten is a strategically important industrial metal. Scheelite (CaWO 4) is an important tungsten-containing mineral, and calcite (CaCO 3) is a significant gangue mineral in many scheelite deposits (Feng et al., 2015, Ilhan et al., 2013).The most common flotation technique commercially used for the treatment of scheelite is …
DetailsThe evolution of the scheelite flotation process has been predicated on the advancement of flotation reagents, which has resulted in the creation of the fatty acid flotation process, chelating collector flotation process, and metal–organic complex flotation process, all of which are integral to the three primary scheelite flotation …
DetailsScheelite was selectively floated from a low-grade calcitic run-of-mine ore (containing 0.28% WO3, 96.3% CaCO3 and 2.24% SiO2) with a 70.6% WO3 grade and a 70% recovery, using oleoyl sarcosine as ...
DetailsThe scheelite flotation performance with the etidronic acid, normal water glass, and acidified water glass is demonstrated by using laboratory-scale experiments. Etidronic acid shows an improved selective depression ability. The grade is improved from 0.7% to 1.83% and the flotation efficiency reaches 13.19 when the etidronic acid dose …
DetailsThis paper proposes luteolin (LUT) as a novel depressant for the flotation-based separation of scheelite and calcite in a sodium oleate (NaOL) system. The suitability of LUT as a calcite depressant is confirmed through micro-flotation testing. At pH = 9, with LUT concentration of 50 mg·L−1 and NaOL concentration of 50 mg·L−1, scheelite …
DetailsAlthough both scheelite and fluorite showed good flotation in the pH. Conclusion. In this study, PA was shown to be an effective depressor in the separation of scheelite and fluorite. Flotation and zeta potential test results consistently showed that PA interactions with the scheelite surface had less effect on the chemisorption of NaOl.
DetailsNowadays, with the depletion of high-grade scheelite resources, the efficient exploitation of complex, low grade with complicated geological structure scheelite ore have to take into account. This work introduces a feasible mineral processing method for the beneficiation of low grade and complex scheelite using the X-ray transmission …
DetailsFig. 1 (1) shows that when DDAC was used as the collector, scheelite flotation was good, with a recovery higher than 90% above pH 3, and of almost above pH 5. In contrast, the recovery of calcite increased slowly over the pH range 6–12, and reached 80% at pH 12. As calcite becomes soluble below pH 6, the acidic limit of …
DetailsThe scheelite raw ore used in this study was obtained from the overflow of the ball mill in the flotation plant of XinTianling Mining concentration in Chenzhou, China, with a WO 3 grade of 0.20 wt%. The multi-elementary analysis results of the run-of-mine ore are shown in Table 1.The only tungsten mineral was scheelite, and was associated with …
Details@article{Foucaud2019InvestigationOT, title={Investigation of the depressants involved in the selective flotation of scheelite from apatite, fluorite, and calcium silicates: Focus on the sodium silicate/sodium carbonate system}, author={Yann Foucaud and Inna V. Filippova and Lev O. Filippov}, journal={Powder Technology}, …
DetailsBoth scheelite and calcite showed good flotation in the pH region from 8 to 12 and the optimum condition for scheelite flotation around pH 9. The high recovery of scheelite and calcite in the basic region is attributed to interaction between RCOO − and Ca ions on mineral surface ( Gao, 2014 ).
DetailsAn 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 …
DetailsThe micro-flotation tests of scheelite and cassiterite was carried out using an XFG hanging trough flotation machine (Jilin prospecting machinery factory, China) with a 40 ml volume, and the spindle speed of 1600 rpm. In each experiment, 2 g of pure minerals, either single or mixed, were weighed and the mineral surface was cleaned …
Details1. Introduction. Tungsten is a strategically important industrial metal. Scheelite (CaWO 4) is an important tungsten-containing mineral, and calcite (CaCO 3) is a significant gangue mineral in many scheelite deposits (Feng et al., 2015, Ilhan et al., 2013).The most common flotation technique commercially used for the treatment of …
DetailsStudies have shown that soluble starch can selectively inhibit cassiterite during scheelite flotation to achieve flotation separation of the two minerals, and the polar groups in starch can selectively coordinate with tin active sites on cassiterite surface and then adsorb on cassiterite surface [25]. Some studies have shown that the organic ...
DetailsThe flotation separation of scheelite, which is hindered by its interface similarity with calcium-containing minerals, remains a worldwide challenge. Achieving precise …
DetailsThe floatability of scheelite and calcite in the presence of single depressant (SHMP or H3Cit) and mixed depressant (SHMP/H3Cit) was studied by microflotation experiments and artificial mixed mineral experiments. Solution chemical calculation, zeta potential tests, thermodynamic analysis and XPS analysis were used to explain the …
DetailsScheelite associated with calcium-containing minerals such as calcite and fluorite is difficult to separate by flotation because of the Ca ions contained in the mineral lattices, which cause scheelite to have similar surface properties and floatability to gangue minerals. Traditional collectors such as oleic acid need to add a large amount of sodium …
DetailsScale inhibitors with excellent chelating ability may be utilized as selective depressants to achieve the flotation separation of calcic minerals. In this paper, we provide details on …
Details1. Introduction. Scheelite (CaWO 4) is a typical tungstate mineral and usually co-exists with other calcium-containing minerals, such as calcite (CaCO 3) and fluorite (CaF 2) in scheelite deposits.By now, flotation is the most commonly used technique to separate scheelite from calcite and fluorite (Hu et al., 2012).However, due to the same …
DetailsIn order to improve the scheelite flotation with sodium oleate (NaOL), the effect of a non-ionic polyoxyethylene ether (JFC-5) on the floatability of scheelite was investigated through flotation experiments at 10 °C, compared with 60 mg/L NaOL alone, the recovery of scheelite is improved from 22% to 85% in the presence of JFC-5 with a …
DetailsThe fine scheelite flotation using garnet and glass beads as agitation medium was investigated through slurry rheology and froth property analysis. The apparent viscosity of fine scheelite, calcite and quartz (−20 μm) slurry were measured and the corresponding scheelite flotation behaviours, froth water recovery and froth height …
DetailsPrevious studies have proved that the lead complexes of benzohydroxamic acid (Pb–BHA) are effective collectors of scheelite flotations; however, the separation of scheelite from calcite needs depressants with high selectivity. In this study, we reported a novel depressant for calcite minerals, and Pb–BHA served as the collector of scheelite. …
DetailsEffects of carboxylic acid collector, benzohydroxamic acid (BHA), sodium hexametaphosphate (SHAP), sodium silicate, and oxalic acid on scheelite flotation were studied through flotation tests, quantum chemical calculation, and flotation solution computational chemistry. In terms of the calculation results, the relationship between …
DetailsScheelite associated with calcium-containing minerals such as calcite and fluorite is difficult to separate by flotation because of the Ca ions contained in the mineral lattices, which …
DetailsFlotation is the primary technique used to enrich scheelite. However, flotation separation of scheelite from calcium-bearing gangue minerals, such as calcite and fluorite, has always been ...
DetailsDownload : Download high-res image (121KB) Download : Download full-size image The figure shows the selective inhibition of BAI on calcite in flotation separation. The differential selective adsorption of BAI on the surfaces of calcite and scheelite can be attributed to variations in the density of calcium ions per unit area, spacing of the …
Details1. Introduction. A typical reagent regime for scheelite flotation is called the "lime flotation process", which involves the addition of lime and sodium carbonate as co-pH modifiers, sodium silicate as a depressant and oleic acid (or sodium oleate) as the main collector (Vazquez et al., 1976, Yongxin and Changgen, 1983, Martins and Amarante, …
DetailsThis paper reviews the scheelite flotation reagents, including collectors and regulators, and introduces recent research progress on the mechanisms for the interactions between the …
DetailsScheelite is quite readily floatable with fatty acids in an alkaline circuit with soda ash and sodium silicate. Other non-metallic minerals such as calcite and fluorspar are often present in the ore, so a high- grade scheelite concentrate is difficult to produce by flotation. Sulphides, if present, must be floated ahead of the scheelite. Conclusion
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