Working Principle and Application of Arc Infrared Carbon and Sulfur Analyzer

TheArc Infrared Carbon And Sulfur Analyzeris a specialized elemental analysis instrument designed to rapidly and accurately measure the total carbon and sulfur content in solid samples. It combines electric arc combustion technology with non-dispersive infrared absorption spectroscopy,serving as essential testing equipment widely adopted in metallurgy,material science,mining and quality inspection sectors.

The working mechanism of the analyzer follows two core stages:sample combustion and infrared detection. A weighed solid sample is placed in a crucible and ignited by an electric arc under a continuous stream of high-purity oxygen. The high temperature generated by the arc enables full oxidation of carbon and sulfur elements inside the sample. Carbon is converted into carbon dioxide while sulfur turns into sulfur dioxide. The mixed gas flows into infrared detection cells. According to the Beer-Lambert law,carbon dioxide and sulfur dioxide molecules absorb infrared light at their respective characteristic wavelengths. The instrument records the attenuation of infrared light intensity,converts the signal into gas concentration data,and finally calculates the mass percentage of carbon and sulfur in the original sample.

Compared with high-frequency induction carbon sulfur analyzers,the arc type has obvious advantages in handling samples with poor conductivity. It does not rely on the electromagnetic induction heating of conductive materials,so it can analyze non-metallic samples such as ores,refractory materials and powder samples conveniently. The equipment structure is relatively simple with low operation cost and easy maintenance. It can complete a single test within dozens of seconds and realize batch continuous sample analysis,which meets the demands of fast on-site detection in industrial production lines.

Modern arc infrared carbon and sulfur analyzers integrate gas path control modules,signal acquisition circuits and computer analysis software. Operators can set test parameters,view real-time analysis curves,store test records and print reports directly on the supporting software system. The instrument supports flexible measurement ranges and can detect trace and high-content carbon and sulfur after calibration with standard reference materials. Strict temperature and humidity control of the gas pipeline and optical chamber helps reduce interference from water vapor and dust,guaranteeing stable and repeatable test results.

This analyzer plays an irreplaceable role in industrial quality control. In iron and steel manufacturing,it monitors carbon and sulfur content to guarantee mechanical properties of steel products. In mineral processing and refractory industries,it supports raw material component evaluation. It is also applied in laboratories for material research and third-party product verification. As material testing standards keep improving,arc infrared carbon and sulfur analysis technology will continue to be optimized to deliver reliable elemental data for material research and industrial manufacturing.