how can i depress carbonates in flotation
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how can i depress carbonates in flotation

How Can I Depress Carbonates In Flotation

Патент US3329266 - Flotation process involving depression of sulfide minerals... and of disodium aceto dithio carbonate as a depressant reagent serving to depress the said sulfides of one or more metals other than molybdenum.Hydrophilic thio compounds as selective depressants in the flotation separation of copper and molybdenum. US4295962 *.

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Flotation separation of carbonate from sulfide minerals, I ...

01/07/2004  Reverse flotation of carbonate minerals from refractory gold-bearing sulfide ores requires the flotation of the carbonate minerals (calcite, dolomite, siderite, etc.) while depressing sulfide minerals and native gold. The flotation of carbonates can be achieved by anionic oxyhydryl collectors and this has been well established. However, depression of sulfide minerals when non-sulfhydryl

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how can i depress carbonates in flotation

carbonate depression in flotation. Selective flotation of phosphate. The observed optimum flotation of calcite and dolomite by carboxylic acids as a function of the starch consumption, and the subsequent depression of flotation, may be chiefly due to the adsorbed conformation structures of the starch molecules to the strength of the hydrogen bonds with the surfaces of hydrated minerals..

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A Review of Flotation Separation of Mg Carbonates ...

Since Mg carbonate flotation is so sensitive to pH, it is possible to selectively float dolomite from monazite ((REE)PO 4) using sodium oleate at pH 4 or by using flotinor 1682 (organic phosphoric acid) at pH 4 or 7; however, depressants and activators are necessary for a more effective separation . Various investigations indicated that Mg carbonate recovery is pH dependent, and separation is effective in

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A Review of Flotation Separation of Mg Carbonates ...

the final concentrate recovery. Fine carbonates ( 45 m) exhibit low selectivity in flotation systems [23]; floating these fines would require an immense increase in the collector concentration beyond economic viability. Furthermore, the entrainment effect of fine carbonates can significantly increase the losses

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Flotation of carbonates from phosphate ores in acidic ...

01/06/1993  The U.S. Bureau of Mines developed a process to separate carbonate (cal- cite) from phosphate minerals occurring in the unaltered phosphate ores of Phosphorla Formation (Rule et al., 1974). The process uses fluosiliclc acid to depress the phosphate while floating the

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Effect of depressants in the selective flotation of ...

SHMP and Ca ions, the mechanism of depression of Ca -bearing minerals with SHMP is possibly due to the formation of Ca(II) complexes by SHMP. However, it cannot act as a suitable depressant to depress smithsonite because of its negative impact on smithsonite and calcite flotation at the same time by adding its concentration.

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(PDF) Effect of carbonate alkalinity on flotation behavior ...

Another series of flotation tests were conducted in order to investigate the effect of collector concentra- It is clear from the figure that as alkalinity tion on the flotation recovery at 0 and 10 1 M increases from 0 to 10 1 M, quartz is depressed as carbonate alkalinity. The latter value was chosen flotation recoveries sharply decrease from over 90% because of the noted effect. The results for amine to 10% in both the

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Carbonate Phosphate Separation by Flotation

Selective fatty acid flotation of carbonate gangue from sedimentary apatites was achieved under acidic pH’s without a specific apatite depressant and without conditioning the pulp with the collector. Concentrates (35-38% P2O5, 0.8-1% MgO) with high recoveries (80-85%) were produced from Indian and Chinese dolomitic ores. The calcareous and/or dolomitic-siliceous phosphate ores of South ...

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Role of sodium carbonate in scheelite flotation – A multi ...

01/12/2018  It’s in presence of both sodium silicate and sodium carbonate that flotation seems most effective: on one hand, calcite flotation improves slightly and seems to reach an average between SS and SC alone at high sodium carbonate dosages but is yet depressed. On the other hand, any depression effect on scheelite disappears and the mineral is actually promoted. It would seem that sodium carbonate

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A Review of Flotation Separation of Mg Carbonates ...

Since Mg carbonate flotation is so sensitive to pH, it is possible to selectively float dolomite from monazite ((REE)PO 4) using sodium oleate at pH 4 or by using flotinor 1682 (organic phosphoric acid) at pH 4 or 7; however, depressants and activators are

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A Review of Flotation Separation of Mg Carbonates ...

the final concentrate recovery. Fine carbonates ( 45 m) exhibit low selectivity in flotation systems [23]; floating these fines would require an immense increase in the collector concentration beyond economic viability. Furthermore, the entrainment effect of fine carbonates can significantly increase the losses

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Flotation of carbonates from phosphate ores in acidic ...

01/06/1993  The U.S. Bureau of Mines developed a process to separate carbonate (cal- cite) from phosphate minerals occurring in the unaltered phosphate ores of Phosphorla Formation (Rule et al., 1974). The process uses fluosiliclc acid to depress the phosphate while floating the

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A Review of Flotation Separation of Mg Carbonates ...

Depressants and Modifiers As mentioned earlier, carbonates are typically gangues for their AVMs, and they are most often depressed; however, in some cases they are floated, and their associated valuable minerals are depressed (reverse flotation when AVM are the target). As has been reported, fine particles have interactive effects on each other that could depress another mineral [56]; fine ...

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(PDF) Effect of carbonate alkalinity on flotation behavior ...

Another series of flotation tests were conducted in order to investigate the effect of collector concentra- It is clear from the figure that as alkalinity tion on the flotation recovery at 0 and 10 1 M increases from 0 to 10 1 M, quartz is depressed as carbonate alkalinity. The latter value was chosen flotation recoveries sharply decrease from over 90% because of the noted effect. The results for amine to 10% in both the

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Carbonate Depressants - Froth Flotation (Sulphide

Carbonate Depressants - Froth Flotation (Sulphide Oxide) - Metallurgist Mineral Processing Engineer. Could you please suggest me best depressants for carbonate minerals in flotation of sedimentary phosphate?

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Flotation Depressants - Mineral Processing Metallurgy

21/10/2020  Its action is positive and progressive ; it is only necessary to add it to the pulp in sufficient quantity to make the pyrite unfloatable. The other minerals, are depressed at the same time, but can be floated again by the addition of sufficient xanthate, which will have no effect on the pyrite provided that enough lime has been added. If the quantity of reagents needed be prohibitive as regards cost a

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Method of floating calcium carbonate ore and flotation ...

From U.S. Pat. No. 4,995,965 it is known to separate calcium carbonate from impurities, such as silicate, by the steps of floating the silicate and concentrating the valuable mineral, i.e. the calcium carbonate in the remainder, in the presence of amine-group containing collectors. From this patent specification appears that a number of cationic compounds, such as methyl-bis(2-hydroxypropyl)-cocoalkyl

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Flotation separation of pyrite from arsenopyrite using ...

20/06/2020  Using copper sulfate is required in achieving flotation separation under weak alkaline. HA alone could depress the arsenopyrite flotation and show good selectivity towards pyrite. Interestingly, compared to the single depressant of sodium humate, higher pyrite and lower arsenopyrite recoveries were obtained when using the combination. The zeta potential, adsorption capacity and cyclic

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How calcite and silica can be depress in froth flotation ...

1- Conditioning temperature; ambient temperature has a vital effect on conditioning procedure of Fluorspar flotation; therefore I think if you use Oleic Acid and Sodium Carbonate (Na 2 Co 3) (or ...

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A Review of Flotation Separation of Mg Carbonates ...

the final concentrate recovery. Fine carbonates ( 45 m) exhibit low selectivity in flotation systems [23]; floating these fines would require an immense increase in the collector concentration beyond economic viability. Furthermore, the entrainment effect of fine carbonates can significantly increase the losses

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Recovery of Calcium Carbonate from Wastewater Treatment ...

Investigation has shown that froth flotation can be economically . and effectively used to produce a relatively high grade calcium carbonate with good recovery from the wastewater treatment sludges when using magnesium carbonate with lime for flocculation [10]. Flotation had its beginning in mineral processing and as such it has been used for a long time in solid to solid separation using ...

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A Review of Flotation Separation of Mg Carbonates ...

Depressants and Modifiers As mentioned earlier, carbonates are typically gangues for their AVMs, and they are most often depressed; however, in some cases they are floated, and their associated valuable minerals are depressed (reverse flotation when AVM are the target). As has been reported, fine particles have interactive effects on each other that could depress another mineral [56]; fine ...

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(PDF) Investigation of the Mechanism of

The 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...

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how can i depress carbonates in flotation

Starch can depress hematite effectively in a wide pH range but cannot depress . Carbonate Phosphate Separation by Flotation 2020-06-08 0183; 32;In these tests the cell products obtained from the carbonate flotation step was conditioned for three minutes with 0.5 kg/ton sodium sili e to depress siliceous gangue. Results. The effect of pH on ...

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RU2454282C2 - Collector for flotation of carbonates ...

FIELD: process engineering. SUBSTANCE: invention relates to collector for separation of carbonates by flotation and may be used for flotation of phosphates rocks. Proposed collector comprises, at least, one phosphorous acid ether according to formula , where R 1 represents H, CH 3 or C 2 H 5 , - R 2 represents the group selected from 2-ethyl butanol, 2-methyl pentanol, 2-ethyl hexanol, 2 ...

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Collector for the flotation of carbonates - Kao ...

Despite that described in the state of the art, it can be concluded that improvements in the field of non-sulfurous mineral enrichment by flotation are still required, particularly, in the phosphoric rock flotation process, in which collectors for the separation by flotation of carbonates are used, which on one hand allow obtaining a good yield and suitable foam but, on the other hand, allow ...

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Effect of Alkalinity on Flotation Behavior of Quartz

effect of carbonate alkalinity on the flotation of quartz. Alkalinity was adjusted by adding NaHCOj to the water. The carbonate alkalinity in waters equilibrated with atmosphere at or above pH 10 is in the form of (JO* and can exceed 10"' M (StuminMorgan 1981). Therefore, alkalinity of the test waters varied from zero to K)"1 M CO; alkalin­ ity. The flotation recoveries in the cationic and ...

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How calcite and silica can be depress in froth flotation ...

1- Conditioning temperature; ambient temperature has a vital effect on conditioning procedure of Fluorspar flotation; therefore I think if you use Oleic Acid and Sodium Carbonate (Na 2 Co 3) (or ...

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An Overview of Calcite Recovery by Flotation SpringerLink

23/09/2020  A few researchers have claimed that calcite flotation is independent of pH and some other studies showed that the depression of calcite is possible between pH 8 and 10 while separating it from other salt-type minerals. The IEP of calcite was at pH 8 and the microflotation studies corroborate with the zeta potential and adsorption results either with anionic or cationic collector. Generally, sodium silicate

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