MATLAB软件对微波场中磷石膏温度变化影响因素的研究

Study on temperature change influence factors of phosphogypsum in microwave field based on the MATLAB software

磷石膏加热时间的不确定性问题制约了磷石膏的研究与利用,本文对磷石膏的处理采用微波加热的方法,并通过MATLAB曲线拟合技术对实验数据进行拟合,得到磷石膏在微波加热期间和冷却过程中时间与磷石膏温度的关系曲线,同时得到曲线方程表达式。磷石膏时间与温度曲线出现了若干基点,本文分析了其变化的原因,解决了磷石膏温度及加热时间确定性问题。结果表明在微波加热初期,磷石膏温度与时间呈分段线性关系,这主要取决于磷石膏的介电常数;而在冷却过程中,磷石膏温度与时间呈二次线性关系,这主要取决于磷石膏的导热系数。利用所得函数可以得出磷石膏加热所需时间,同时利用所得加热时间也能推算磷石膏加热最高温度。

The uncertainty problem of phosphogypsum heating time restricts the research and utilization of phosphogypsum, the microwave heating method was used in the treatment of phosphogypsum in this paper, and the experimental data was fitted by the of MATLAB curve fitting technology. The curve of temperature and time was obtained during the process of phosphogypsum heating and cooling, the curve equation was obtained at the same time. Several points were appeared in the curve of temperature and time, on the basis of study on reasons for curve slope changes, the problem of the phosphorus gypsum temperature and heating time uncertainty was solved. Results showed that at the beginning of the microwave heating, the relationship between temperature and time of phosphogypsum was piecewise linear, which mainly depended on the dielectric constant of phosphogypsum. In the cooling process, the relationship between temperature and time of phosphogypsum was quadratic linear, which mainly depended on the coefficient of thermal conductivity of phosphogypsum. The required heating time of phosphogypsum could be obtained by the function in the paper, and the maximum heating temperature could be also calculated by using the heating time previously determined.