scholarly journals Effects and Mechanisms of Grinding Media on the Flotation Behavior of Scheelite

ACS Omega ◽  
2020 ◽  
Vol 5 (49) ◽  
pp. 32076-32083
Author(s):  
Wei Yao ◽  
Maolin Li ◽  
Ming Zhang ◽  
Rui Cui ◽  
Jiangfeng Ning ◽  
...  
Keyword(s):  
Grinding Media ◽  
Flotation Behavior

scholarly journals Effect of grinding media on the flotation behavior of fluorite using sodium oleate as a collector

2020 ◽  
Vol 56 (3) ◽  
pp. 556-565
Author(s):  
Wei Yao ◽  
Maolin Li ◽  
Ming Zhang ◽  
Gongming Qian ◽  
Rui Cui ◽  
...  
Keyword(s):  
Sodium Oleate ◽  
Grinding Media ◽  
Flotation Behavior

scholarly journals Effect of Grinding Media on Grinding-Flotation Behavior of Chalcopyrite and Pyrite

2020 ◽  
Vol 7 ◽  
Author(s):  
Ningning Liao ◽  
Caibin Wu ◽  
Jindong Xu ◽  
Bo Feng ◽  
Ji Wu ◽  
...  
Keyword(s):  
Grinding Media ◽  
Flotation Behavior

scholarly journals Effects and Mechanism of Different Grinding Media on the Flotation Behaviors of Beryl and Spodumene

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 666 ◽  
Author(s):  
Hu ◽  
Sun
Keyword(s):  
Sodium Oleate ◽  
Photoelectron Spectroscopy ◽  
Mineral Surface ◽  
Silicate Minerals ◽  
Wet Grinding ◽  
Grinding Media ◽  
Grinding Conditions ◽  
Interaction Simulation ◽  
Cationic Collector ◽  
Flotation Behavior

The flotation behavior of beryl and spodumene (typical silicate minerals) was studied at wet-grinding conditions with different grinding mediums, with dodecylamine or sodium oleate as the collector. The mechanism of potential influence of the grinding medium to the flotation behavior was investigated through measuring zeta potential of pure minerals, micro scanning by X-ray photoelectron spectroscopy (XPS), surface interaction simulation and etc. The test data suggested that, with dodecylamine as the collector and relatively lower pH, the recoveries of beryl and spodumene are higher with zircon balls as wet-grinding media than those with iron balls, while in the higher pH, the recovery difference became smaller. With sodium oleate as a collector, within the same pH environment, the recovery of beryl and spodumene under zircon ball wet-grinding is lower than those under iron wet-grinding. We observed formation of iron-hydroxyl complexes on the mineral surface after iron ball grinding, which are significant influence on the flotation behavior of silicate minerals. Furthermore, for iron wet-grinding, the iron adsorbed on the mineral surface increased the adsorption energy between laurylamine (cationic collector) and silicate minerals, which inhibited the interaction between collectors and minerals. On the other hand, the interaction energy between sodium oleate (anion collector) and silicate minerals was decreased, which promoted the interaction between collectors and minerals.

scholarly journals A Novel Particle-Based Approach for Modeling a Wet Vertical Stirred Media Mill

Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 55
Author(s):  
Simon Larsson ◽  
Juan Manuel Rodríguez Prieto ◽  
Hannu Heiskari ◽  
Pär Jonsén
Keyword(s):  
Finite Element Method ◽  
Reynolds Number ◽  
Finite Element ◽  
Grinding Fluid ◽  
Novel Approach ◽  
Grinding Media ◽  
Interparticle Contacts ◽  
Mineral Slurry ◽  
Stirred Media Mill ◽  
Element Method

Modeling of wet stirred media mill processes is challenging since it requires the simultaneous modeling of the complex multiphysics in the interactions between grinding media, the moving internal agitator elements, and the grinding fluid. In the present study, a multiphysics model of an HIG5 pilot vertical stirred media mill with a nominal power of 7.5 kW is developed. The model is based on a particle-based coupled solver approach, where the grinding fluid is modeled with the particle finite element method (PFEM), the grinding media are modeled with the discrete element method (DEM), and the mill structure is modeled with the finite element method (FEM). The interactions between the different constituents are treated by loose (or weak) two-way couplings between the PFEM, DEM, and FEM models. Both water and a mineral slurry are used as grinding fluids, and they are modeled as Newtonian and non-Newtonian fluids, respectively. In the present work, a novel approach for transferring forces between grinding fluid and grinding media based on the Reynolds number is implemented. This force transfer is realized by specifying the drag coefficient as a function of the Reynolds number. The stirred media mill model is used to predict the mill power consumption, dynamics of both grinding fluid and grinding media, interparticle contacts of the grinding media, and the wear development on the mill structure. The numerical results obtained within the present study show good agreement with experimental measurements.

Effects of coarse chalcopyrite on flotation behavior of fine chalcopyrite

2021 ◽  
Vol 163 ◽  
pp. 106776
Author(s):  
Muhammad Bilal ◽  
Mayumi Ito ◽  
Kanami Koike ◽  
Vothy Hornn ◽  
Fawad Ul Hassan ◽  
...  
Keyword(s):  
Flotation Behavior

Effect of grinding media properties and stirrer tip speed on the grinding efficiency of a stirred mill

2021 ◽  
Vol 382 ◽  
pp. 556-565
Author(s):  
Wang Guo ◽  
Peng Gao ◽  
Zhidong Tang ◽  
Yuexin Han ◽  
Xiangzhi Meng
Keyword(s):  
Grinding Media ◽  
Grinding Efficiency

scholarly journals A Comparative Study of Energy Efficiency in Tumbling Mills with the Use of Relo Grinding Media

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 735
Author(s):  
Nikolay Kolev ◽  
Petar Bodurov ◽  
Vassil Genchev ◽  
Ben Simpson ◽  
Manuel G. Melero ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Test Procedure ◽  
Mining Industry ◽  
Slight Modification ◽  
Index Test ◽  
Grinding Media ◽  
Work Index ◽  
Mineral Sample ◽  
Tumbling Mills ◽  
Bond Tests

An evaluation of Relo grinding media (RGM, Reuleaux tetrahedron-shaped bodies) performance versus standard grinding media (balls) was made through a series of grinding tests, including a slight modification of the standard Bond test procedure. Standard Bond tests showed a reduction in the Bond ball mill work index (wi) of the mineral sample used in this study when using Relo grinding media. The modified Bond test procedure is based on using the standard Bond ball work index test but changing the circulating loads (350%, 250%, 150%, 100%). The comparative tests with RGM were carried out at the same number of revolutions as the grinding tests with balls at respective circulating load. The RGM charge yielded a 14% higher net undersize product than balls, which hints at improving energy efficiency and the potential for significant mining industry benefits.

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