Study On The Effect Of Different Transport Processes On The Morphology And Electrolytic Efficiency Of Aluminum Particles

Aluminum is a major non-ferrous metals in the field of basic materials,that play a important role in modernization of the national economy.However,it also has the resources and the production of high energy consumption and heavy environmental burden of typical characteristics.At the national vigorously promote energy conservation strategy realistic conditions,the industry is facing increasing challenges only through strong innovation and the actual production of all aspects of the ongoing technological improvements,the full energy saving,really effective to improve production efficiency,it it is possible to gain a firm foothold in the brutal competition in the market to achieve healthy and sustainable development.In this paper,According to the process of transformation of aluminum industries related to the alumina feeding method,Focusing on gas lift pump and wire belt bucket elevator vertical transport of the two methods under conditions.Explore the influence of different methods of transportation alumina particles characteristics and physico-chemical properties,Comprehensive study of different transportation methods of interaction law between structure and properties of alumina particles,And explains its inner mechanism.Through the comparative study of the mechanical transfer process,pneumatic conveying discovery process will lead to more intense friction and collision between the alumina particles,the particles increased wear,improve roundness,increased fine particles.The combined effect of these results is the angle of repose of the material is reduced,accelerate the settlement,is not conducive to the anode insulation,is not conducive to fast to fully dissolve the particles in the electrolyte,thereby reducing the electrolysis current efficiency.The study also found that using Image size analysis detection of alumina particle size distribution than the screening method and the laser method has better accuracy and adaptability.Pneumatic conveying to sample different crystal alumina particle content fluctuations are more obvious,Probably produce more dramatic effect when the fluid transport to lead classification,Mechanical delivery situation is significantly much more stable.This fluctuation of the quality of raw materials to maintain the stability of extremely unfavorable,The stability of the subsequent electrolysis reaction will bring greater volatility,and electrolytic power consumption increases.From the point of view about Wettability of alumina particles,After pneumatic conveying contact angle of the sample particles increases,so that the wettability accordingly deteriorated.Coupled with the pneumatic conveying of the sample will be a corresponding smaller than the surface area,These changes will reduce the alumina particles and heat transfer rate of dissolution in cryolite melt,leading to lowering of electrolytic current efficiency.The study also showed that after the pneumatic conveying?potential of the alumina particles will be increased,Promote their adsorption more Na~+in the electrolyte,the corresponding electrical double layer effect also makes alumina colloidal particles to form larger micelles accelerate flocculation deposition,thereby undermining the normal electrolysis reaction conditions.The study also establish a alumina particles mass transfer controlled dissolution model,exploring the factors that influence the rate of dissolution of the aluminum oxide particles in the electrolyte,It found that under certain set conditions,the model can predict the rate of dissolution of different sample particles in the electrolyte,with good adaptability.While further showed pneumatic conveying manner will increase the energy consumption of aluminum electrolysis,therefore,whether from the two aspects of theory and practice have proved that by improving mechanical transmission method can not only effectively save energy,But also for stable quality of raw materials,electrolysis reaction conditions and improve the efficiency of the electrolysis current,it is both effective and reliable technical approach.