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A two-stage process of recovery of zinc-lead-silver from zinc leaching residue was investigated. The stage of sulfated roasting-water leaching of zinc leaching residue was applied to recovery zinc by controlling sulfuric acid dosage, roasting time and temperature, leaching time, the ratio of L/S and the addition of sodium chloride. The second stage is chloride leaching of the residual solid after...
A great amount of sodium hydrate alumino-silicate generated from alumina production not only threatens the environment but also causes waste of secondary resources. High-alumina-content sodium hydrate alumino-silicate was employed to recover alumina by the process of hydrometallurgical route at low temperature and normal atmosphere. The X-ray diffraction pattern shows sodium hydrate alumino-silicate...
In order to make full use of the advantages of existing vehicle electric drive systems and avoid their shortcomings, a two-motor drive system with the function of change modes between single motor drive, two motors joint drive and independent wheel drive was designed. The torque transmission characteristics analyses and application simulation of this drive system have been done. Under the control...
In order to make full use of the advantages of every electric vehicle (EV) driveway and reduce the demand of motor properties, a changing modes propulsion system was designed. According to the requirement of EV running conditions to power performance, this system can achieve modes transfusion between single motor driving, two motors joint driving and independent wheel driving. The working mechanism...
ZnFe 2 O 4 -based inert anodes were made to conduct the aluminum electrolysis tests. The corrosion behaviors of the inert anodes were examined and discussed. Experiment results prove that: (1) ZnFe 2 O 4 -based inert anodes are good corrosion resistant to AlF 3 -NaF-Al 2 O 3 melts under the conditions of anodic polarization; (2) High anodic current...
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