富氧加压反应器焙烧辉钼矿过程研究

Study on Molybdenite Roasting Process in an Oxygen Enriched Pressure Reactor

在富氧加压反应器中压力-温度关系是表征辉钼矿氧化进程的重要曲线,但是由于散热和升温影响,实测温度不能真实反映反应器内的气体温度,需要进行校正。研究利用热平衡和理想气体方程建立环境温度、顶部实测温度和校正温度的关联式,通过空罐焙烧试验,确定关联式中的待定系数A和B,从而建立以环境温度和顶部实测温度的变化确定校正温度的方法。结果表明,该关联式能够较好地反映真实气体温度,对于空罐焙烧的相关系数达到0.915,根据该校正方法对辉钼矿富氧加压焙烧过程进行分析,发现在富氧加压环境中,辉钼矿氧化温度有所降低,在压力为0.262～0.276MPa,温度为456～481K时就开始发生显著反应。

In an oxygen enriched pressure reactor,it was very important to present the molybdenite oxidation process using the curve about temperature and pressure.However,the measured temperature value could not reflect the gas temperature in reactor because of the influence of radiation and temperature rising.It was thus necessary to make a calibration to get the real gas temperature in reactor.An equation relating with environmental temperature,measured temperature and calibration temperature was set up based on the thermal equilibrium and general gas law.The parameters A and B were calculated through the empty reactor roasting experiment.As a result,the method of calibration temperature decided by the change of environmental temperature and the top measurement temperature of reactor was set up.The results showed that the equation fitted well with the real gas temperature.The relationship parameter R2 was 0.915 in empty reactor roasting experiment.The molybdenite roasting process in an oxygen enriched pressure reactor was analyzed by this calibration method.The oxygen temperature was found to decrease during molybdenite oxidation in an oxygen enriched pressure environment.The reaction started obviously when the pressure was 0.262-0.276 MPa and temperature was 456-481 K.