Method for Determination of Sulfur Content in Quicklime by Conductometric Method

Abstract

The invention discloses a method for determining sulfur content in quicklime through a conductivity process. The method comprises: weighing five low-sulfur-content limestone standard samples and five high-sulfur-content limestone standard samples, spreading each sample on a porcelain boat and spreading linear copper oxide, combusting, and then employing a conductivity analyzer to detect the conductance value of each standard sample, so as to respectively obtain the linear curve of the low-sulfur-content quicklime standard samples and the high-sulfur-content quicklime standard samples; weighing a quicklime sample and spreading in a porcelain boat, spreading linear copper oxide, combusting, and collecting the gas by an oxidant-containing aqueous solution, and employing a conductivity analyzer to detect the conductance value of the aqueous solution, and obtaining the sulfur content of the sample according to the linear curve equation of the low-sulfur-content standard samples; and when the conductance value is escaped, weighing a quicklime sample, measuring the conductance value again, and obtaining the sulfur content in the linear curve equation of the high-sulfur-content standard samples. The method is capable of accurately rapidly determining the sulfur content in quicklime without being influenced by sulfur content, and helps to effectively improve determination precision and working efficiency.

Description

technical field [0001] The invention relates to a method for measuring sulfur content in quicklime by a conductivity method. Background technique [0002] The sulfur content in quicklime is an important assessment index. At present, in the industry, the sulfur content in quicklime is usually measured by the combustion iodometric method, but the determination of sulfur content by this method is affected by various factors such as furnace temperature, co-solvent and equipment. The conversion rate of medium sulfur is only a certain recovery rate under a specific condition, so the standard solution can only be calibrated with a standard sample with equivalent components, so as to obtain the result, and the color change is judged by the naked eye during the analysis process. end. Because the sulfur in quicklime is affected by the sulfur in the limestone raw material, calcination temperature, kiln and other conditions, its content varies greatly, and there are two analysis errors...

AI Technical Summary

Problems solved by technology

[0002] The sulfur content in quicklime is an important assessment index. At present, in the industry, the sulfur content in quicklime is usually measured by the combustion iodometric method, but the determination of sulfur content by this method is affected by various factors such as furnace temperature, co-solvent and equipment. The conversion rate of medium sulfur is only a certain recovery rate under a specific condition, so the standard solution can only be calibrated with a standard sample with equivalent components, so as to obtain the result, and the color change is judged by the naked eye during the analysis process. end

Because the sulfur in quicklime is affected by the sulfur in the limestone raw material, calcination temperature, kiln and other conditions, its content varies greatly, and there are two analysis errors in the analysis by iodometric method: 1. There is no suitable standard sample calibration The concentration of potassium iodate, because the sulfur conversion rate of samples with different contents and different materials is different; 2. Due to the uncertainty of the sulfur content in the sample, the end point is determined by human eyes during analysis, and the titration speed cannot keep up

As a result, poor analysis accuracy and frequent rework measurements are caused in the measurement, resulting in low efficiency of the measurement work

Images