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Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The effect of acid etching on the floatability of dolomite and its mechanism of action were investigated by flotation tests, flotation kinetic fitting, surface roughness characterization, specific surface area analysis, XPS analysis, adsorption performance analysis and wettability analysis under sodium oleate system. The research results showed that acid etching increased the surface roughness and specific surface area of dolomite, exposing more active sites, strengthened the adsorption sodium oleate, enhanced the hydrophobic of dolomite, and thus improved the performance of dolomite. Moreover, regarding flotation kinetic fitting, the classical first-order model, first-order model with rectangular distribution of floatability, and the second-order kinetic model all displayed the R² values higher than 95%. Compare with other models, the classical first-order model exhibited the best fit. At a sodium oleate mass concentration of 60 mg/L, the k value of classical first-order for dolomite reached a maximum value of 1. 88 min-1 . However, in this case, before acid etching, the k value of classical first-order model for dolomite was only 1. 15 min-1 . These results further confirmed that acid etching could improve the flotation rate of dolomite. In summary, this study can provide a new research perspective for dolomite flotation, with a certain theoretical and practical significance. [ABSTRACT FROM AUTHOR]

In order to study the influence of surface physical properties on mineral floatability， two kinds of dolomite particles with different surface roughness were obtained by ultrasonic pretreatment. In sodium oleate system， the influence of surface roughness on the recovery rate of dolomite flotation was investigated by single mineral flotation test， and atomic force microscope(AFM)， BET， SEM-EDS， XPS， ultraviolet spectrophotometer and contact angle measuring instrument were used. The mechanism of the impact of surface roughness on mineral flotation behavior was discussed. The results show that ultrasonic treatment increases the surface roughness of dolomite particles and the content of active sites (Ca2+ and Mg2+) on the surface of rough particles is higher than that on the surface of smooth particles. This contributes to the adsorption of sodium oleate on mineral surface， enhancing its hydrophobicity and floatability. [ABSTRACT FROM AUTHOR]

Copyright of Multipurpose Utilization of Mineral Resources / Kuangchan Zonghe Liyong is the property of Multipurpose Utilization of Mineral Resources Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

It is found that the addition of fine-grained talc reduces the floatability of malachite on sulfurized flotation by flotation test, and the higher the content of fine-grained talc, the greater the influence on the floatability of malachite. Zeta potential measurements, adsorption tests, SEM-EDS test and EDLVO theory calculation illustrated the reason for the influence of fine-grained talc on sulfurized flotation of malachite. The results show that the adsorption of appropriate amount of Na2S on the surface of malachite is the key to the success of sulfidization-xanthate flotation. The fine-grained talc adsorbs on the surface of malachite, and the adsorption of Na2S doesn’t occur on the surface of talc. Therefore, the fine-grained talc weakens the effect of sulfidization on the surface of malachite and reduces the floatability of malachite. [ABSTRACT FROM AUTHOR]

The Donganshan mixed magnetic concentrate was separated through the pre-classification - enhanced dispersion flotation process, and the corresponding mechanism was investigated by the sedimentation test, zeta potential test, and turbidity measurement. Under the optimum conditions, a concentrate iron grade of 66.24% and iron recovery of 79.47% can be obtained by the closed circuit of classification - dispersion flotation, in which the recovery of concentrate iron is increased by 4.47% compared with the dispersion flotation results. The sedimentation and turbidity test indicate that the dispersant citric acid and particle size distribution can influence the dispersion state of the hematite-quartz mixture suspension. The adsorption of citric acid onto the hematite surface will increase the electrostatic repulsive force between the mineral particles. The narrow fraction flotation obtained by optimizing particle size distribution can decrease the detrimental hetero-aggregation, which is beneficial to the subsequent flotation separation, which is also supported by the DLVO theory and the agglomeration dynamics. [ABSTRACT FROM AUTHOR]

Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The depression effect of starch on fine hematite is poor during the reverse flotation of hematite. Flotation tests, EDL VO calculations, particle size analysis and SEM analysis were used to investigate the depression effect of starch on fine hematite with the assistance of magnetic seeding aggregation. The results showed that the depression effect of starch on hematite decreased with the decrease of hematite particle size. The addition of magnetite enhanced the depression effect, which became more obvious with the increase of magnetite particle size. The attraction between magnetite of different sizes and fine hematite leads to the aggregation of magnetite with hematite particles, and the larger the particle size of magnetite, the stronger the attraction is. The magnetic seeding aggregation increased the apparent particle size of fine hematite, thus strengthened the depression effect of starch on hematite. [ABSTRACT FROM AUTHOR]

Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nonferrous Metals Engineering is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of the Chinese Society of Rare Earths is the property of Editorial Department of Journal of the Chinese Society of Rare Earths and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Flotation tests， Zeta potential measurements， infrared spectrum analyses， EDLVO calculations and SEM analyses were used to investigate the effect of citric acid on entrainment behavior of fine chlorite in hematite reverse flotation. Flotation results illustrated that citric acid promotes entrainment behavior of fine chlorite， and is conducive to removing chlorite in concentrate. Zeta-potential tests and infrared spectrum analyses indicated that adsorption of citric acid on the surfaces of chlorite and hematite increases their electronegativity and enhances the electrostatic repulsion between hematite and chlorite particles. EDLVO calculations demonstrated that the attraction between hematite and fine chlorite is transformed into repulsion after interacting with citric acid， and the calculation results are consistent with those of SEM. [ABSTRACT FROM AUTHOR]

The flotation performance of bornite was investigated， and the adsorption mechanism of sodium butyl xanthate(NaBX) on the bornite surface was studied by using the adsorption measurement， infrared spectroscopic analysis， adsorption kinetics and thermodynamic calculation. The pH value ranging from 5 to 9 is favorable for highter floatability， and the adsorption conforms to the multimolecular layer adsorption of Freundlich model. When the pH value is 12， the floatability is poor， and the adsorption belongs to monolayer adsorption of Lamgmuir model. The adsorption of NaBX on the bornite surface conforms to second-order kinetic equation， and it is a spontaneous chemical adsorption process. The thermodynamic calculation shows that the adsorption reaction at pH 9 is easier than that at pH 12. Infrared spectroscopic analysis shows that the adsorption species of NaBX on the surface of bornite contain Cu(BX)2，Fe(BX)3 and(BX)2 when the pH ranges from 5 to 9， while there is only Cu(BX)2 when pH is 12. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Fuzhou University is the property of Journal of Fuzhou University, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrometallurgy of China is the property of Hydrometallurgy of China Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The flotation behavior and action mechanism of sodium oleate as collector for direct flotation of malachite was studied.The adsorption mechanism of sodium oleate on the surface of malachite was investigated through the adsorption measurement, Zeta potential test, Fourier transform infrared spectroscopy analysis, and solution chemistry calculation and thermodynamic calculation of solution.The results showed that the recoveries of malachite are more than 70% at pH value from 7 to 10 with sodium oleate 160mg/L, which reached the highest value 88.67% at pH=9.5. The Zeta potential measurement and solution chemical calculation indicated that sodium oleate mainly emits the chemical adsorption on the surface of malachite, the active component are C17H33COOH·C17H33COO-, C17H33COO- and (C17H33COO)22- in sodium oleate solution. The results of Gibbs free energy calculation and FTIR spectrum analysis confirmed that oleate ions tends to react with malachite surface to form copper oleate precipitation causing malachite’s flotability [ABSTRACT FROM AUTHOR]

Copyright of Journal of Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Flotation test， adsorption test， and solution chemical calculations were used to investigate the effect of siderite and dolomite on quartz flotation in sodium oleate flotation system. The results of flotation and adsorption tests showed that the effect of siderite on quartz flotation is related to the dissolved siderite species and starch， and siderite significantly influences flotation of quartz in the presence of starch. The negative effect of dolomite on quartz flotation could be whittled by increasing the dosage of sodium oleate. The solution chemical calculations indicated that dissolved siderite species might convert the initial surface of active quartz to CaCO3 precipitates which can be easily depressed by starch， while the dolomite dissolution is restrained by calcium ions in the solution， which might explain the difference of effects on quartz flotation between dissolved siderite species and dissolved dolomite species. [ABSTRACT FROM AUTHOR]

Effects of the content of fine fractions ( <18 μm) on hematite flotation were studied by using flotation tests, extended DLVO (EDLVO) theoretical calculations and kinetics of particle aggregation. The flotation results indicate that hematite recovery is related with the size of coarse particle ( >18 μm) and particle size distribution. When the size of coarse particle is relatively large, the recovery of hematite is high. EDLVO theoretical calculations confirm that the fine particles could interface with the coarse particles and the attraction energy increases with the coarse particle size increasing. The flotation recovery increases with the particle size distribution becoming balance (the fine fractions equals the coarse fractions), and the rate of particle coagulation is relatively high in this case which is analyzed by kinetics of particle aggregation. These conclusions could explain why the recovery of hematite is influenced by particle size distribution. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)