New insights into the promotion mechanism of (NH&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt; in sulfidization flotation: a combined experimental and computational study

Chen, Daixiong; Meng-fei, Liu; Hu, Bo; Dong, Yanhong; Wei, Xue; He, Peng; Fang, Chen; Zhu, Jianyu; Zhang, Chenyang

doi:10.37190/ppmp/140340

Cited by 5 publications

(5 citation statements)

References 26 publications

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“…3D printing technology originated from the traditional technique of fabricating 3D components layer by layer directly in computer-aided design (CAD) [6]. 3D printing is a truly innovative application technology, which has become a multifunctional technology stage [7].…”

Section: Introductionmentioning

confidence: 99%

Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer

2022

Advances in Multimedia

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As the main component of the 3D printing industry, the fused deposition process covers all aspects of the industry with its advantages of low R&D investment, high practicability, and open source programs. However, due to process problems, problems have arisen in terms of printing efficiency and molding quality. To this end, we designed a large-scale multinozzle FDM printing device using the high-current fused deposition (FDM) printing principle. The defects of small size, slow printing speed, and low precision are deeply studied, and the machine structure is optimized according to the structural strength analysis. In this paper, the theoretical design and static analysis of the overall mechanical part of the large-scale FDM device are carried out, and then, the selection of the movement organization structure and movement method is theoretically analyzed. A modular flow chart is designed for the control system to coordinate and control the parallel and precise operation of multiple nozzles, and the relationship function between the main controller, power driver, and heating module is designed. By modifying the firmware parameter command, we can find out the optimal method running on the platform and discuss the function usage of the slicing software in detail. According to the current problems of FDM printing equipment, various factors affecting printing speed were analyzed from the perspective of printing accuracy, and the process parameters of 3D printer were studied through orthogonal experiments. Speed, nozzle temperature, idling speed, and fill rate were studied, and the relationship between factors affecting printing speed and printing accuracy was obtained. Use a simple model print to measure the overall performance of your product. The stability of the system is verified by short-term and long-term printing tests. The analysis results show that the forming performance and stability of the large-scale FDM are improved significantly.

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Section: Introductionmentioning

confidence: 99%

Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer

2022

Advances in Multimedia

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“…The recovery then remained nearly constant with the increase of BX. After sulfidization, the malachite surface could easily interact with xanthate, which improved the hydrophobicity of the mineral surface [27]. This result indicated that the sulfidization could promote the flotation of malachite.…”

Section: Flotation Experimentsmentioning

confidence: 92%

Evaluation of L-arginine as an Eco-Friendly Activator for Malachite Sulfidization Flotation

Liu

Chen

et al. 2022

Minerals

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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 malachite surface was investigated by adsorption experiments, zeta potential measurements, scanning electron microscopy (SEM-EDS) and X-ray photoelectron spectroscopy (XPS) analysis. Flotation experiments showed that LA had a significantly promoting effect on malachite sulfidization flotation. Adsorption experiments and SEM-EDS results indicated that LA improved the adsorption of S (II) species into the malachite surface and promoted the formation of sulfides. This finding was further confirmed by the XPS analysis. The XPS measurements results determined that S (II) species reacted with Cu (II) on the malachite surface and form polysulfides, adding LA promoted the reaction. The zeta potential measurements showed that LA increased the positive electrical properties of the mineral surface, which was conducive to S (II) species adsorption and the sulfidization reaction. This work sheds new light on the development of sulfidization activation.

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“…Furthermore, Chen et al [69] reported the promotional effect of ammonium sulphate ((NH 4 ) 2 SO 4 ) as a modifier in malachite sulfidization flotation with butyl xanthate (BX) as a collector. The DFT calculation results indicated that the adsorption energy of HS − produced by the ionization of sodium sulfide (Na 2 S, a sulfidizing reagent) in water was reduced by the addition of (NH 4 ) 2 SO 4 , which demonstrated that (NH 4 ) 2 SO 4 could improve the adsorption stability of HS − on a malachite surface.…”

Section: Copper Oxide Mineralsmentioning

confidence: 99%

Application of Quantum Chemistry in the Study of Flotation Reagents

Tang,

Chen,

Chen

et al. 2023

Minerals

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Flotation reagents are significant for modifying the interfacial characteristics of mineral grains to achieve the effective separation of minerals. Since the 1960s, when quantum chemistry was first introduced into the study of flotation reagents, many achievements have been made, although some controversial topics remain. The application of quantum chemistry in the research of flotation reagents for the separation of various minerals in the past decade is herein comprehensively and systematically reviewed. The main directions and gaps of current research are pointed out, the theoretical basis for the design and development of novel flotation reagents is summarized, and more importantly, the potential for the targeting design and development of efficient, selective, and environmentally friendly flotation reagent molecules by means of quantum chemistry is explored.

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New insights into the promotion mechanism of (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> in sulfidization flotation: a combined experimental and computational study

Cited by 5 publications

References 26 publications

Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer

Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer

Evaluation of L-arginine as an Eco-Friendly Activator for Malachite Sulfidization Flotation

Application of Quantum Chemistry in the Study of Flotation Reagents

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