##tihuan2##Samples of malachite and calcite used for the experiments described in this study were obtained from Yunnan Dahongshan Copper minerals. XRD analysis demonstrated that the two mineral samples had minimal contamination and that the high purities measured were sufficient for use in flotation experiments (XRD patterns are …
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##tihuan2##For the artificial mixed ore flotation tests involving malachite and calcite (or quartz), the methodology includes measuring out 1.0 g of each mineral and placing them into the same 30 mL flotation cell. After the pH adjustment and initial stirring, the collector is introduced, and the mixture is stirred again for another two minutes.
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##tihuan2##To prepare the malachite supernatant, the malachite samples (< 37 µm, 2.0 g) were mixed with 50 mL deionized water, the mixture was then magnetically stirred for 30 min, after the mixture was left undisturbedly for a desired time, 40 mL of the supernatant was transferred in a flotation cell. The subsequent flotation tests were then performed ...
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##tihuan2##Another application is separation of malachite and azurite ore using sulfidization flotation. Keywords. Flotation, surfactants, collectors, activators, depressants, metallurgy. 1. INTRODUCTION ... There are 40 different types of flotation cells that are being used all over the world. Most of them are represented by three main types. 2.1.1 ...
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##tihuan2##malachite and calcite on the flotation behavior of both miner-als is of great importance. In the present work, the flotation behavior of malachite ... (−74+37 µm) was placed in a flotation cell containing 40 mL of deionized water, after which the mix-ture was constantly stirred. Following the addition of Na2S
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##tihuan2##The effects of the bacterial growth phase on the malachite flotation were investigated in a well-controlled Hallimond tube system. Rhodococcus opacus, which is one of representative hydrophobic ...
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##tihuan2##The floatability of malachite by the anionic collectors like sodium oleate and Aeropromoter 845, was about 97% in pH 5~11 range, whereas that of malachite by alkyl …
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##tihuan2##Sulfidization followed by xanthate flotation is an effective technique to recover copper oxide minerals. However, the sulfidization mechanism of malachite has not been determined. In this work, the sulfidization mechanism was investigated by microflotation, field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), …
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##tihuan2##The small-scale flotation tests were conducted by using a mechanical flotation machine with a plexiglass 100 mL cell of 2000 rmp/min agitation speed. In each flotation, 3 g malachite (−75 + 38 µm) was mixed with 80 mL of water and …
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##tihuan2##With the depletion of copper sulfide minerals, malachite has attracted increasing interest. Since malachite is a relatively soft mineral, with a Moh's hardness of 3.5–4 [], fines are easily produced in the crush and grinding process.Froth flotation poorly responds to fine mineral particles, mainly because the collision efficiencies between fine …
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##tihuan2##All flotation tests were carried out using a 1.5 L Denver flotation cell operating at 1200 ... While more work is required to determine why malachite flotation is reduced when using OHA, one explanation may be that the increased malachite solubility results in a more elevated concentration of Cu 2+ ions in solution, ...
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##tihuan2##Highest recovery rates. For decades, WEMCO flotation cells have consistently delivered the highest recovery. WEMCO II's combination of efficient aeration and optimum solids suspension not only increases recovery and concentrate grade performance, but also reduces reagent consumption.
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##tihuan2##Although this method has high selectivity for the malachite flotation from quartz, it is confronted with several disadvantages, including low sulfidization ... (Jilin Exploration Machinery Factory, China) with a micro-flotation cell of 30 mL. All the flotation tests were implemented at room temperature and the agitator speed was kept at 1800 ...
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##tihuan2##Malachite is one of the most important copper-bearing oxide minerals; however, it shows poor floatability prior to sulfidization under the thiol collector system.
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##tihuan2##This test was performed using the XFG–II flotation machine at an available cell of 40 mL and the rotation speed of 1600 r/min was used in the malachite flotation test. Before the experiment, a malachite sample (2 g) was placed in a flotation tank, and 35 mL of ultrapure water was added for slurry mixing.
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##tihuan2##This work assesses the potential of biosurfactants as collectors in the flotation of ultrafine (smaller than 20 μm) particles of hematite and malachite. As …
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##tihuan2##Micro-flotation studies. Malachite sulfidization flotation was tested with an XFGII microflotation facility with a 40-mL microflotation cell. In the single-mineral flotation test, the malachite sample and deionised water were placed in the cell and stirred for 1 min. The samples were sulfidized using sodium sulfide (Na 2 S·9H 2 O).
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##tihuan2##Bacteria in different growth phases are studied for the malachite flotation. • Bacteria in the stationary phase show higher malachite floatability. • Bacteria in both …
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##tihuan2##Accordingly, the flotation behaviors and adsorption mechanisms of benzohydroxamic acid (BHA) and sodium butyl-xanthate (SBX) on the surface of malachite were systematically investigated using ...
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##tihuan2##Floc-flotation of malachite fines with an octyl hydroxamate and kerosene mixture was studied to improve the flotation recovery, using microflotation, microscopy …
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##tihuan2##2. Experimental 50 J. Min. Met. 40A (1) (2004) The study of 8-hydrohyquinoline and salicylaldoxime action at the malachite flotation The minerals used malachite, calcite and quartz had the grading between 100-250 µm. One gram of mineral and also the colector sollution, with known concentration and pH, are introduced in the Hallimond cell.
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##tihuan2##Microflotation tests were performed using an XFGII flotation machine with a microflotation cell (40 mL). The speed of the flotation machine was set to 1640 r/min. The particle size range of the malachite test minerals was 37–74 µm. ... Malachite flotation recovery as a function of xanthate concentrations in the absence and presence of Cu 2 ...
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##tihuan2##The investigation included zeta-potential measurements to understand reagent interactions with malachite and quartz; and bench scale flotation experiments …
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##tihuan2##The malachite and calcite surfaces treated with CH 6 N 2 O 2 and Na 2 S·9H 2 O featured a flotation recovery rates of 82.51% and ∼ 20%, respectively, and achieved a satisfactory selective flotation separation of malachite from calcite. CH 6 N 2 O 2 could promote the formation of Cu-S on the malachite surface. A large number of Cu-S on the …
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##tihuan2##In single mineral flotation test, 40 mL of deionized water and 2.0 g of malachite or talc samples were placed in the flotation cell. Then, NaOH or HCl solution was used to adjust the pH to an expected value, after which the desired amount of famciclovir was added and allowed to react for 3 min, and then 2# oil was added and …
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##tihuan2##Floc-flotation of malachite fines with an octyl hydroxamate and kerosene mixture was studied to improve the flotation recovery, using microflotation, microscopy image observations, contact angle …
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##tihuan2##With NaBX as the collector, malachite floatability was weak without sulfidation prior to flotation, and the flotation recoveries of malachite were 20.42% at 2 × 10 −5 mol/L concentration of ...
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##tihuan2##The flotation was carried out in a 0.5-L flotation cell (XFDIV; Jilin Mine Exploration Machinery Factory, Jilin, China). Tap water, with a pH of approximately 7.4, was used in the flotation. After the pulp was agitated for 2 min, TEA (3000 g/t) was introduced and the mixture was further agitated for an additional 5 min.
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##tihuan2##during flotation with oxyne and salicylaldoxime at the surface of malachite were studied by I.R. spectroscopy. Keywords: flotation, malachite, oxyne, salicylaldoxime, I.R. spectroscopy 1. Introduction
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