Microwave heating the ore system temperature gradient and temperature distribution
    Because microwave only useful minerals in the ore has a heating effect. Right gangue minerals are not. However, two minerals close symbiosis. Thus the heat conduction between them is inevitable . That is , at any time in the heating , systems exist in both the ore to a temperature gradient and the temperature distribution field ;
    In order to simplify the problem with a single particle of useful minerals are surrounded by a large number of gangue and isotropic . As useful minerals gangue mineral particles depends tablets than smaller , so the whole system can be seen as a sphere , and is the axis of symmetry . Meanwhile, the instantaneous microwave heating and small mineral particles , can be considered useful minerals within the temperature field is uniform, heat conduction through the interface is only in contact with the gangue minerals proceed.
    Chalcopyrite - silica system , for example, the system of the ore and the temperature distribution of the temperature gradient and the solid puzzle theoretical calculation results will be discussed
    At low microwave power (180w) , the temperature rising speed is quite slow , and therefore extend the radiation corresponding time : This is the chalcopyrite absorber of microwave energy is converted into heat. Have enough time to diffuse into the quartz gangue , and the resulting curve is a very flat temperature profile . With the increase of microwave energy in a short period of time to produce a significant rise in temperature and the obtained distribution curve steeper . 680w energy , the irradiation time t 2-4m force chalcopyrite and quartz difference there is between the temperature of 400K , to further increase the microwave power to 10kw, in the afternoon, about 0.001s produced within a significant temperature, energy absorption is fast that occurred too late to significant thermal diffusion . At high energy, the quartz almost remains the original temperature , rapid heating is not of chalcopyrite , the temperature difference between the two minerals up to 1000K to diffuse due to heat quartz gangue minerals go , save unnecessary energy consumption , so that the energy saving .
    Live with the theoretical calculated values ​​have a certain gap . Measured in a more intense thermal diffusion , but the overall trend is still chalcopyrite high temperature, low temperature, quartz , instant heating the ore in a temperature gradient exists in the system .