Abstract Anti-mud agents could improve the efficiency of action water reducers in concrete by preferentially. The anti-mud agent was preferentially adsorbed on clay surface, which reduces ineffective adsorption reducing to paste, thereby improving reduction efficiency. However, its application high-sediment content coal gangue gypsum backfill materials had not been reported. In this paper, comp...

The challenge in using fully mechanized caving mining technology for thick coal seam is monitoring the mixing ratio of gangue during top process. In this paper, we propose a passive wireless sensing system based on second-order parity-time symmetric operated around exceptional point mixing, which has an LC resonance structure consisting spiral resonant coil and parallel-plate capacitor at end s...

Historically, the ability to effectively separate carbonate gangue from bastnaesite via flotation has frequently proven be challenging without sacrificing significant rare earth oxide (REO) grade or recovery. However, in light of fact that bearing minerals often exhibit higher specific gravities than gangue, possibility exists use gravity separation could used achieve such a selective separatio...

Coal gangue is used to replace cement clinker prepare cementitious material via activation techniques. Thus, the solid waste can be effectively disposed, and carbon emission from production processes significantly reduced. In this paper, product transformation, reaction mechanism, thermal kinetics of coal were analyzed by X-ray diffraction, analysis, infrared scanning electron microscopy. We em...

kalchoye copper-gold deposit is located about 110 kilometers east of esfahan province and within the eocene volcano sedimentary rocks. sandy tuff and andesite lava are important members of this complex.the form of mineralization in area is vein and veinlet and quartz as the main gangue phase. the main ore minerals are chalcopyrite, chalcocite, galena and weathered minerals such as goethite, iro...