Testing items and standards for lime
The testing items and standards for lime are important criteria for evaluating whether its product quality meets industrial application requirements. These tests mainly focus on chemical composition, physical indicators, and activity to ensure that lime can meet the specific needs of different fields such as metallurgy, chemical engineering, environmental protection, and construction.
Chemical composition analysis is the core project of lime testing. The content of calcium oxide and magnesium oxide is a key indicator for determining the effective components of lime, usually measured by titration. The raw burning and over burning rates reflect the level of calcination process and need to be evaluated through reduction in ignition experiments. The content of acidic insoluble substances is also an important test, which is related to the purity of lime. Excessive impurities can affect the subsequent use effect. Different industries have their own emphasis on chemical composition standards, such as metallurgical lime having higher requirements for calcium oxide content.
Physical performance testing is equally indispensable. Particle size screening is a fundamental project, and particle size distribution directly affects reaction rate and transport performance. Activity is the core physical indicator for measuring the hydration reaction rate of quicklime, which is determined by measuring the temperature rise rate during its reaction with water. High activity lime is widely used in desulfurization and chemical engineering fields. In addition, the fineness of powdered lime must meet the corresponding standards. These testing items and standards together constitute a complete system for evaluating the quality of lime, providing reliable basis for production control and product application.
