carbonate and phosphate can be somewhat altered.. in the presence of one another. Carbonate and phosphate species can be expected to chemisorb - --on the calcite surface and thus can compete with oleate for the surface Casites resulting in flotation depression. Ca on the ~ - - -
Read Morecalcite have been studied through micro-flotation. The single mineral flotation tests show that LSC can depress calcite, but it has little effect on flotation. Flotation separation of a mixture of smithsonite smithsonite and calcite can be completed to obtain a zinc concentrate grade up to 33.85% Zn with a recovery of 70.06%.
Read MoreThe potential of sodium tripolyphosphate as a depressant for selective flotation separation of scheelite from calcite is investigated by the micro-flotation tests and industrial scale tests in this study. The depression mechanism of sodium tripolyphosphate is also studied by adsorption measurement, Zeta potential measurement and FTIR spectra.
Read More12%The flotation of calcite alone or from phosphate slimes using potassium oleate as a collector and in the presence of potassium dihydrogen phosphate (KH 2 PO 4) as a phosphate depressant was studied (El-Mofty and El-Midany 2015; Mitzmager et al. 1966).
Read MoreIn calcite flotation studies using carbon dioxide, in RG/CL/RCL mechanical cell circuit configuration, considering the overall performance obtained (grinding product + natural fines), the overall ...
Read MoreThe aim of this study was to evaluate the effect of Ca2+ ion concentration on the water during the calcite flotation stage of the Santa Quiteria phosphate ore, between 6 mg/L (standard test) and ...
Read MoreIn this study, the effect of sodium pyrophosphate (NaPP) on the separation of apatite from dolomite by flotation was systematically investigated. Flotation results revealed that NaPP could selectively depress the flotation of apatite, thus realizing the separation of apatite from dolomite. Further, the selective depression mechanism of NaPP was studied through zeta potential measurements ...
Read MoreFlotation of calcite and apd.U te as a functif)n of the concentration of potassium oleate under tlle s~ Iff conditions is g'iven in Figure 1. ... depression of apatite by phosphate in the acidic reg~ou. 1he depression of - 4 - - --~pati ~A by Phosphate (H2PO4IHPO4 ) could be due to the specific adso~tior. of phosphate ions on the Ca-sites of ...
Read MoreMoroccan high-grade phosphate has so far always been upgraded by reverse flotation. Within a major project to go back to the deposits considered as sterile or low grade, this preliminary study was conducted in a micro-flotation cell to find new routes for their beneficiation by direct flotation. Three collectors, alone and combined to modifiers, were evaluated for a potential direct flotation ...
Read MoreNov 01, 2011· 10%· Separation of refractory rock phosphate (P2O5 = 11.5%) from the Dalir area, Iran, containing quartz, calcite and other impurities, by calcination and flotation processes has been successfully used to upgrade the phosphate values.
Read MoreIn this study, conducted in a laboratory scale, eight different depressants, organic and inorganic, were tested in the direct flotation of a Brazilian silicate-carbonate phosphate ore. The best performance in the depression of calcite and silicates was achieved with cassava starch.
Read MoreCalcite Depression In Phosphate Flotation. 15 Mar 2003 Interactions of salt type minerals with common inorganic flotation depressants silicate and phosphate in fluorite, calcite, and apatite single mineral on fluorite and calcite was identified as a major depression mechanism.
Read MoreSelective flotation of phosphate-carbonate ores - Springer. The observed optimum flotation of calcite and dolomite by carboxylic acids as a function of the starch consumption, and the subsequent depression of flotation,...
Read MoreThe results of single mineral flotation experiments showed that GA performed a considerable selective depression on calcite at pH 7–11, and a concentrate with apatite recovery of 88.84% and P 2 O 5 grade of 26.86% was obtained in the apatite-calcite binary mixed mineral flotation experiment. Therefore, GA can be used as a separate depressant ...
Read MoreSupernatants of apatite and even that of calcite depressed the flotation of calcite markedly in the pH range of 5 to 13. Addition of Ca(NO3)2, K2CO3, and K3PO4 also produced definite effects under various pH conditions. Apatite flotation was also affected by the mineral supernatants and by carbonate and phosphate solutions.
Read MoreOverall, most of the studies reported optimum flotation conditions of calcite recovery above pH 8 with anionic collectors. A few researchers have claimed that calcite flotation is independent of pH and some other studies showed that the depression of calcite …
Read Moreof lhe greal challenges in phosphate froth flotation with high carbonate conlents is lo produce coneentratcs with smaller Ca0/P20 5 ratios, since the apalile and the calcite have similar superficial propertics. which rcsult in low sclccti vity bctwcen these species in lhe froth flotation proccss.
Read MoreThe flotation response of malachite, calcite and quartz to bis (2-ethylhexyl) phosphate (DEHPA), dibutyl phosphate (DBP) and tributyl phosphate (TBP) was evaluated by micro-flotation experiments. The results showed that DEHPA exhibited an impressive flotation selectivity for malachite against calcite/quartz in the pH range of 6.0–9.0 and achieved superior malachite flotation recovery over ...
Read MoreFlotation of the phospho-chem and phospho-clasts size fractionThe following conclusions could be reported:1. It was easy to float calcite at pH 4.5, without chemical depression of phosphate. Actually, the depression of this latter mineral at this pH was so strong, sometimes, to …
Read MoreCalcite Depression In Phosphate Flotation. flotation routes for a phosphate ore bearing silicate-carbonate gangue. concentration of a phosphate ore bearing a silicate-carbonate gangue: (i) bulk apatite and calcite flotation followed by calcite flotation in the presence of …
Read MoreThe best performance in the depression of calcite and silicates was achieved with cassava starch. Keywords: flotation depressants; anionic flotation; silicate-carbonate phosphate ore. RESUMO. A forte demanda por bens minerais verificada nas últimas décadas tem levado o setor mineral a ampliar sua capacidade produtiva.
Read MoreFlotation Developments & Best Practice | - International Mining. Nov 4, 2013 ... His lecture 'Size matters- coarse and quick flotation can reduce costs' ... found where Wemco mechanisms were replaced by these mechanisms." ..... copper gold, gold, carbonaceous gold, nickel, phosphate ores and coal. ... in ore mineralogy and poor pyrite depression even at very high dosages of NaSH.
Read MoreThe depression behavior and mechanism of guar gum on talc-type scheelite flotation were systematically investigated by flotation experiments, adsorption tests, zeta-potential measurements, and infrared spectroscopic analyses. The flotation results for monominerals, mixed minerals, and actual mineral samples indicated that guar gum exhibited much higher selective depression for talc than for ...
Read MoreHighlights The flotation response of apatite and calcite using of fatty acid collectors were investigated. Several kinds of phosphate minerals depressant were also evaluated. Phosphoric and sulfuric acids successfully depressed sedimentary phosphate minerals. A mixture of (Na,K) Tartarat and aluminum sulfate had a maximum effect on phosphate mineral depression. Collector and …
Read MoreSeparation of calcite and/or dolomite from phosphate rock by flotation is becoming the practice in several phosphate mining areas where higher carbonate contamination is encountered. In almost all cases, the phosphate rock must be ground to liberate the calcite and/or dolomite so that it can be separated from the phosphate rock.However,
Read MoreInorganic acids (sulfuric acid (H2SO4) or phosphoric acid (H3PO4)) are generally employed as depressants in the reverse flotation of collophanite to separate apatite from dolomite. In this study ...
Read MoreThe effects of sodium hexametaphosphate (SHMP), water glass (WG), carboxymethyl cellulose (CMC) and lignosulfonate calcium (LSC) as depressants on smithsonite and calcite have been studied through micro-flotation. The single mineral flotation tests show that LSC can depress calcite, but it has little effect on smithsonite flotation.
Read MoreHow calcite and silica can be depress in froth flotation of fluorite? I have already tried sodium silicate and quebracho. ... you can try hexa metha phosphate(HMP) or …
Read MoreThe flotation separation efficiency of scheelite from calcite was studied by artificial mixed mineral experiments. The depression mechanism of depressant was studied by the solution chemical analysis of the mineral soluble component and the depressant solution. Furthermore, it was proved by the zeta potential of the mineral surfaces.
Read MoreThe acidic flotation process of carbonates at pH 4.5-5.0 followed by a direct phosphate flotation uses phosphoric acid as depressor of apatite during carbonate flotation. The mechanism of apatite depression is rather hypothetical because of lack of data on the surface speciation in such a complex mineral suspension.
Read MoreAdenosine 5′-triphosphate disodium salt (Na2ATP) was used as the efficient depressant for the separation of cassiterite from calcite. The effect of Na2ATP on the flotation of cassiterite and calcite was evaluated by the micro-flotation experiments, and the results showed that an excellent separation performance was achieved at the reagents regime of 1.0 mM Na2ATP and 0.14 mM NaOL when pulp ...
Read MoreThe way to successfully upgrade a phosphate ore is based on the full understanding of its mineralogy, minerals surface properties, minerals distribution and liberation. The conception of a treatment process consists of choosing the proper operations with an adequate succession depending on the ore properties. Usually, froth flotation takes place in phosphate enrichment processes, since it is ...
Read MoreThe separation of scheelite and calcite by froth flotation is difficulty as these two minerals have similar physicochemical characteristics. To solve this problem, the role of carboxymethyl chitosan in the flotation separation of scheelite from calcite has been studied and the depression mechanism has been discussed.
Read MoreIn flotation, it is very difficult to separate scheelite from calcite. In this study, sodium fluorosilicate (SFS) was used as a depressant in the flotation separation of scheelite from calcite. The selective depression effect of the SFS on calcite was proven by corresponding experiments, such as zeta potential test, FTIR analysis and XPS analysis.
Read MoreIn the absence of the dye, both calcite and apatite float with oleate at pH 10.5. When the dye concentration increases to 5 x 10"6 mol m"3, the flotation of calcite is very little affected with a recovery of about 90%, while apatite flotation is depressed to 5-10%. Calcite flotation is only affected at higher concentrations of dye.
Read More1564 II / FLOTATION / Reagent Adsorption on Phosphates-~ 01-1~:~, ;01)22-/ L. " / '" I-// trolthe dissolution of calcite and apatite in water are given in Table 1. In the case of carbonaceous phosphate minerals, apatite, calcite and dolomite will dissolve in water, followed by pH-dependent hydrolysis and complexa-tion of the dissolved species.
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