高碱铝硅酸盐料浆烘干过程特性研究

Study of high soda aluminosilicate slurry features in the course of drying

以烧结法生料浆为研究对象,对生料浆烘干过程中的料浆的黏度变化、不同温度条件下料浆烘干速率进行了试验研究。研究结果表明:料浆黏度与料浆钙比关系不大,随温度升高,黏度降低,且在水分38%为黏度变化拐点;烘干过程中,当料浆水分减少到20%左右时,料浆黏度突然降低,成为塑性;烘干过程基本上为恒速干燥,随温度的升高,烘干时间变短。这些结论对铝硅酸盐料浆的烘干有较大的指导意义。

The paper studies the viscosity changes of raw mix under different temperatures in the course of drying. It shows that the viscosity of slurry does not relate to the ratio of viscosity to calcium in the slurry too much. The viscosity is decreased with the rising of temperature and there is an inflexion point of viscosity in case moisture becomes 38 %. When the moisture of slurry is decreased to about 20 %, the viscosity suddenly decreases m become plastic during the drying. The drying process generally is of constant velocity. The drying time shortens when the temperature is rising. All above mere tioned issues have great references in alumina industry.