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Sulfidization xanthate flotation remains the most promising method for the beneficiation of malachite. In this study, L-arginine (LA) was first used to modify the malachite surface and improve the efficiency of sulfidization flotation. The performance of LA was evaluated by the flotation experiments. The mechanism of interaction between LA and the...
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... a natural amino acid, L-arginine (LA) is abundantly present in meat protein, which possesses the advantages of being inexpensive and environmentally friendly. The molecular model of LA is shown in Figure 1. LA with a molecular formula of C6H14N4O2 and a molecular weight of 174.2 is easily soluble in water and slightly soluble in ethanol, can be used as a non-toxic, easily biodegradable [24], and widespread activator. ...
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... finding suggests that LA promotes the sulfidization efficiency of the malachite surface, which is consistent with the SEM-EDS results. 18.09 0.39 Cu and S peak fitting were conducted to reveal the chemical state of each element on the malachite surface, and the results are shown in Figures 10 and 11. The Cu 2p spectra of malachite samples before and after treatment show that the Cu 2p spectra consisted of peaks representing Cu 2p3/2 and Cu 2p1/2 [21,31,32]. ...
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... did not react with copper on the malachite surface, which confirmed our conjecture. The S 2p spectrum was further analyzed to elucidate the effect of LA on the sulfidization products, and the results are shown in Figure 11. The S 2p spectrum of malachite treated with Na2S was divided into four pairs of spin-orbit peaks, which were attributed to the S 2p3/2 and S 2p1/2 doublet [38]. ...
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... adsorption of ions onto the malachite surface significantly affected the zeta potential. As shown in Figure 12, the zeta potential of malachite decreased with the increase of pH values. As a typical copper oxide mineral, malachite has certain hydrophilicity, and it can easily adsorb hydroxide ions in the solution, thereby forming a surface hydration film. ...
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... positive electrical properties of the mineral surface are conducive to the adsorption of S(II) species, which thereby increases the contact of S(II) species with the mineral surface, promotes the reaction of S with the mineral surface, and improves surface sulfidation efficiency. The activation mechanism of LA is shown in Figure 13. ...
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During the flotation separation process of bastnaesite, it is difficult to separate bastnaesite from fluorite effectively. In this present study, sodium silicate (SS) can effectively improve the flotation separation effect of bastnaesite and fluorite in salicylhydroxamic acid (SHA) systemasa. Through relevant analyses, such as Zeta potential measur...
Citations
... The most prevalent copper oxide, carbonate mineral is malachite (Cu 2 (OH) 2 CO 3 ), which has metallurgical appeal due to its 57.5% copper content [6,7] . Malachite is very soluble and extensively hydrated in sulfurization processes of dissolving in the enrichment of production of copper metal [8] . Although it is challenging to efficiently recover copper resources from these ores to meet demand, the copper leaching efficiency and recovery efficiency are about 40% and 13%, respectively [5] . ...
... Due to its low boiling temperatures and decompositions, sulfuric acid is typically selected alternative leaching agents for oxidized copper ore [5,6] . The gangue mineral calcite, dolomite, and Fe 2 O 3 that is commonly present in malachite ores can metabolize H 2 SO 4 during the acid leaching process [8,9] . ...
... The XRD patterns show that the mineral has a highly crystalline structure. These properties, XRD, reveal that the ore is believed to be malachite and has his XRD pattern similar to malachite from Yunnan, China (96% pure) [8] . ...
One of the most significant sources of copper metal is malachite ore. The world's demand for copper is being positively impacted by increased extraction. However, the chemical compositions of copper in the malachite ore, which vary depending on the region, determine how well copper may be extracted. This study evaluated hydrometallurgical processing of copper metal from malachite ore of Kola Tembein, Tigray, Ethiopia. Malachite ore was processed hydrometallurgical with sulfuric acid to leach copper metal, which was then recovered using a cementation process of zinc metal. The samples were examined with XRD, EDXRF, SEM, and AAS. The rock ore sample examined by XRD contained a variety of minerals, including malachite (Cu 2 CO 3 (OH) 2 ), quartz (SiO 2 ), Albite Ca-rich (Ca Al 2 Si 2 O 8 ), Albite disorder (NaAlSi 3 O 8 )m etc. and the morphology of malachite ore was supported by SEM. According to the EDXRF results, the malachite ores were dominated by metal oxides of CuO (58.21), SiO 2 (19.21), and Fe 2 O 3 (5.32) by weight%. Similar spectroscopic results were shown for Turkey, China, Chile, and Nigeria malachite. The leaching experiments were optimized by BBD using the RSM to leach malachite at 2.6130 M H 2 SO 4 , 133.919 m particle size, 60 ⁰ C, and 600 rpm agitation speed, and scored 98.159%. Using the cementation process, red-brown copper metal was obtained, and waste was scored by AAS as having very low concentrations of copper (1.74 mg/L) and high concentrations of zinc ions (68.85 mg/L). Both the leaching and cementation processes are best environmentally and economically, and further purification will be needed to recover zinc from the waste
One of the most significant sources of copper metal is malachite ore. The world's demand for copper is being positively impacted by increased extraction. However, the chemical compositions of copper in the malachite ore, which vary depending on the region, determine how well copper may be extracted. This study evaluated hydrometallurgical processing of copper metal from malachite ore of Kola Tembein, Tigray, Ethiopia. Malachite ore was processed hydrometallurgical with sulfuric acid to leach copper, which was then recovered using a cementation process of zinc metal. The samples were examined with XRD, EDXRF, SEM, and FAAS. The rock ore sample examined by XRD contained a variety of minerals, including malachite (Cu2CO3(OH)2), quartz (SiO2), albite Ca-rich (CaAl2Si2O8), albite disorder (NaAlSi3O8)m, etc., and the morphology of malachite ore was magnified by SEM. According to the EDXRF results, the malachite ores were dominated by metal oxides of CuO (58.21), SiO2 (19.21), and Fe2O3 (5.32) by weight%. Similar spectroscopic results of malachite were shown for Turkey, China, Chile, and Nigeria malachite. The leaching experiments were optimized by BBD using the RSM to leach and extract malachite at 2.6130 M H2SO4, 133.919 µm particle size, 60 °C, and 600 rpm agitation speed, with 98.159% (68,850 mg/L) copper recovered. Using the cementation process, red–brown copper metal was obtained, and waste determined by AAS having very low concentrations of copper ions (1.74 mg/L) and high concentrations of zinc ions (68,850 mg/L). Both the leaching and cementation are best in environmentally and economically, and further purification will be needed to recover zinc from the waste.
