Solid-Liquid Phase Equilibria in the Aqueous System Containing Potassium,Magnesium,and Borate at 308.15 K

Experimental studies on the solubility, density, refractive index, and pH value in the aqueous system containing potassium, magnesium, and borate at 308.15 K were determined with the method of isothermal dissolution equilibrium. Based on the experimental results, the diagrams of solubility, density, refractive index, and pH value in this system were plotted. We found that there were one eutectic point and two crystallization regions corresponding to the large area of inderite (L + Mg2B6O11·15H2O) and the relatively small area of potassium borate tetrahydrate (L + K2B4O7 ·4H2O), respectively. Neither double salt nor solid solution was found in this system. The physicochemical properties (density, refractive index, and pH value) in solution at 308.15 K changed regularly with increasing potassium borate concentration. The calculated values of density and refractive index using empirical equations of the aqueous system were in good agreement with the experimental values.

升降吊装作业平台在烟囱钢结构安装中应用

介绍一种新型烟囱钢结构安装施工方法。首先设计制作桁架式作业平台,利用卷扬机作为升降吊装作业平台的提升动力,兼顾材料垂直运输和作业平台双重属性,具有操控简捷、安全平稳、施工效率高以及造价成本低等特点。