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Flotation separation of malachite from calcite is hampered by the surface homogenization of the two mineral surfaces. Therefore, in this study, ammonium acetate (CH 3 COONH 4) was used to improve the flotation separation of malachite from calcite.The results of micro-flotation experiments revealed that, in the presence of CH 3 …
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In this study, the flotation separation performances of malachite from calcite were investigated using a new chelating collector S-carboxymethyl-O, O'-dibutyl …
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The copper sulfide grown on malachite radically changed the surface properties of malachite particles, rendering malachite amenable to xanthate flotation. …
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Sulfidization is a critical stage for the sulfidization xanthate flotation of malachite. Malachite yields optimal flotation performance around pH 9.5 with Na 2 S as sulfidizing agent [6]. Na 2 S is unstable in pulp solution and will be hydrolyzed to produce the following sulfide species that are controlled by pulp pH; ...
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The majority of reagents currently used in mineral flotation processes are fossil-based and potentially harmful to the environment. Therefore, it is necessary to find environmentally-friendly alternatives to reduce the impact of mineral processing activities. Chitin nanocrystals are a renewable resource that, due to the natural presence of amino …
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The functionalized N-alkylated chitin nanocrystals possessed a hydrophobic character, were able to dress mineral particles and featured a performance in the flotation of malachite similar to commercial collectors, which proves the high potential of chitin nanocrystals in this field of application. KW - Chitin nanocrystals. KW - Flotation
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Copper ore dressing equipment 1. Flotation machine Flotation is the most widely used method in copper mine production. The copper ore pulp is stirred and aerated, and the ore particles adhere to the s under the action of various flotation agents. The s rise to form a mineralized layer, which is scraped or overflowed by the scraper.
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Malachite doesn't float easily simply because of the lack of sulfide in the mineral structure. We looked at a project in Northern Chile years ago which was a malachite-silver project. Heap leaching with acid wasn't viable because of the high acid consumption due to the carbonates and hydroxides, and heap leaching with acid wouldn't recover the ...
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The flotation experiments demonstrated that 6 × 10⁻⁵ mol/L OCETC enabled the recovery of up to 98.24% malachite at pH 8.0. Under the same flotation conditions, OCETC exhibited comparable ...
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Various flotation reagents are added to the pulp after grinding, and the pulp is stirred to make it to fully interact with mineral particles, so as to expand the floatability difference among different mineral particles. The adjusted pulp is transported into flotation equipment, and aerated and stirred to form the bubbles (Fig. 2). The ore ...
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minerals Article Reexamining the Role of Ammonium Ions in the Sulfidization, Xanthate-Flotation of Malachite Ruizeng Liu 1, Zhicheng Liu 2, Jianmin Li 3, Shunfu Ao 2, Bin Pei 1, Dianwen Liu 1,* and Jialei Li 1,* 1 Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China; liuruizeng@126 …
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At pH 6.50, with 8 mg/L SDA, effectively recovering malachite from quartz was achieved by reverse flotation, in which 92.71% of malachite was recovered and 91.91% of quartz was removed, …
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To verify the activation effect of a small amount of copper ion on malachite flotation, we compared the malachite flotation test with and without added copper ions. According to the flotation test results in Fig. 1, the flotation test was carried out with the concentration of xanthate as the variable, and the concentrations of Cu 2+ and Na 2 S ...
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The flotation results demonstrated that DSA displayed an excellent collection performance for quartz but not for malachite. At pH 6.50, with 8 mg/L SDA, effectively recovering malachite from quartz was achieved by reverse flotation, in which 92.71 % of malachite was recovered and 91.91 % of quartz was removed, coupled with a high …
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Micro-flotation results showed that HpTT exhibited better flotation selectivity for malachite against calcite and quartz than octyl hydroxamic acid (OHA), and achieved the efficient flotation ...
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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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At pH 6.50, with 8 mg/L SDA, effectively recovering malachite from quartz was achieved by reverse flotation, in which 92.71% of malachite was recovered and 91.91% of quartz was removed, coupled ...
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The functionalizedN-alkylated chitin nanocrystals possessed a hydrophobic character, were able to dress mineral particles and featured a performance in the …
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During the sulfidization–xanthate flotation of malachite in industrial production, Fe 3+ in the pulp may affect mineral enrichment. In this study, we examined the adsorption of Fe 3+ on the malachite surface and sulfidized surface to investigate the effect of Fe 3+ on malachite sulfidization, sulfidization products, and mineral floatability. The …
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The ultrafine particle size improves the grade in the oleate flotation of hematite, as well as the grades in the DDM flotation of hematite and malachite, which …
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The flotation recovery of calcite had little relationship with the change in pH. Conclusions (1) With the high usage of collector PX, an effective flotation separation of malachite and calcite can be obtained. When 1000 mg/L PX was used as the collector, the flotation recovery of malachite reached 88.7 % while that of calcite was less than 5 %.
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In this study, malachite (CuCO 3 ·Cu(OH) 2), considered to be a valuable mineral, was obtained from Junsei Chemical Co., Ltd (Tokyo, Japan).The malachite contained a minimum of 55% of Cu and 95% of CuCO 3.Silica (SiO 2) (99.9% purity, Sibelco Korea CO., Ltd, Nonsan, Korea) was used as a gangue mineral.The silica was …
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Malachite fines are easily produced in the grinding process, leading to low malachite flotation recovery. Floc-flotation of malachite fines with an octyl hydroxamate and kerosene mixture was ...
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The flotation results demonstrate that famciclovir has a stronger collecting ability and higher selectivity to talc than malachite, thus enabling efficient removal of talc from malachite. Furthermore, the FTIR and XPS analyses confirm that famciclovir could selectively adsorb onto the talc surface rather than malachite.
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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 …
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Effective flotation separation of malachite from quartz with a selective collector: Collection ability, separation performance and adsorption mechanism - …
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The effect of seven hydroxamate collectors on malachite flotation was investigated. Separation of malachite from quartz in a synthetic ore was obtained. All seven collectors investigated selectively adsorb onto the surface of malachite. Benzo- and two C 8 alkyl hydroxamates resulted in the best flotation response.
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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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The functionalizedN-alkylated chitin nanocrystals possessed a hydrophobic character, were able to dress mineral particles and featured a performance in the flotationof malachite similar to commercial collectors, which proves the high potential of chitin nanocrystals in this fieldof application. KEYWORDS:Chitin nanocrystals, …
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Specifically, at a flotation time of 20 min, the malachite floatability values were calculated as 39.13, 53.04, and 81.93% in the presence of 0.5, 1, and 2 kg/ton CB-NPs, respectively, and at a flotation time of 60 min, malachite floatability was approximately 42.94, 57.4, and 84.38% in the presence of 0.5, 1, and 2 kg/ton CB-NPs, respectively.
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