TAPPI T617

Analysis of lime, Test Method T 617 cm-23

Applicability: TAPPI T 617 cm-23 describes the chemical analysis of burned lime (quicklime, CaO) used in kraft pulp mill recausticizing operations. It is used to determine the purity and performance-related chemical characteristics of lime.

Purpose: The purpose of TAPPI T617 is to provide a standard method for the analysis of lime, which is used in the pulp and paper industry. Specifically, the test measures the “available lime index” by determining the alkaline content of high-calcium quicklime and hydrated lime, ensuring the material meets the required quality standards for its intended use. This is done by reacting the lime with hydrochloric acid under specific conditions and expressing the result as a percentage of calcium oxide.