Core Technical Characteristics of High Frequency Infrared

Carbon Sulfur Analyzer: Why It Become the “Main Equipment” for Industrial Testing

Compared with traditional carbon and sulfur analysis methods (such as chemical titration and tube furnace combustion), the high-frequency infrared carbon and sulfur analyzer has significant advantages, mainly reflected in the following four points:

1.High analysis efficiency: “minute-level” complete testing

No complex preparation is required for samples (only grinding to the appropriate particle size, typically 100-200 mesh), with a single test taking only 30-120 seconds (including combustion, purification, and testing processes), far exceeding the “hour-level” efficiency of chemical titration methods. This makes it suitable for rapid testing of batch samples (such as rapid analysis at steel plant furnaces).

2.High precision and sensitivity: meets the requirements for trace/ultra-trace analysis

Carbon detection range: 0.0001%-10% (mass fraction), sulfur detection range: 0.00005%–5%, the minimum detection limit (LOD) can reach 0.1 ppm for carbon and 0.05 ppm for sulfur, meeting the stringent requirements for “low sulfur and low carbon” in high-end alloys, precision castings, etc. (e.g., sulfur content in aerospace steel must be ≤0.005%).

3. Good stability: reduces human error

Fully automated operation (one-button start after sample weighing), eliminating the need for manual titration, color development, and other steps, thereby avoiding human operational errors; high-frequency induction combustion temperature stability and precise oxygen flow control ensure that the relative standard deviation (RSD) for multiple tests of the same sample is ≤0.5% (high-precision models can achieve ≤0.2%).

4. Wide range of applicable samples: covers solid samples from multiple industries

The types of samples that can be tested include:

Metal materials: steel, stainless steel, aluminum alloy, copper alloy, titanium alloy, high-temperature alloy, etc.;

Non-metallic materials: ores (iron ore, limestone), coke, coal, cement, ceramics, refractory materials, etc.;

Others: catalysts, soil, waste solids, etc. (requires matching with different accelerator agents, such as adding pure iron agent when testing ores).

Typical application scenarios: from industrial production to quality control

High-frequency infrared carbon and sulfur analyzers are used throughout the entire production, quality control, and R&D chain. The following are three core scenarios:

1. Metallurgical industry: Rapid analysis at the furnace and finished product quality control

Furnace analysis: During steel smelting, it is necessary to monitor the carbon and sulfur content in molten steel in real time (carbon determines the hardness of steel, and excessive sulfur can cause steel to become “hot brittle”). Carbon sulfur analyzer can quickly provide results, guiding operators to adjust the smelting process (such as adding deoxidizers or desulfurizers) to prevent the production of substandard products.

Finished Product Testing: Random inspections of carbon and sulfur content are conducted on steel and alloy materials before shipment to ensure compliance with national standards (e.g., China's GB/T 20123-2006 “Determination of Total Carbon and Sulfur Content in Steel—Infrared Absorption Method After Combustion in a High-Frequency Induction Furnace”).

2. Material processing and manufacturing: Ensuring high-quality product standards

The aerospace and automotive parts industries have extremely stringent requirements for material purity (e.g., high-temperature alloys used in engine turbine blades must have sulfur content controlled below 0.001%). Carbon sulfur analyzers can precisely test the carbon and sulfur content of raw materials and finished products, preventing component failure caused by elemental content exceeding specified limits.

In mechanical manufacturing, the carbon content of cast iron parts directly affects their toughness (e.g., the carbon content of ductile iron must be between 3.6% and 3.8%). The analyzer can quickly verify whether castings meet the required standards.

3. Mining and energy industry: raw material composition evaluation

In iron ore mining, testing the carbon and sulfur content of ore can evaluate its smelting value (e.g., high-sulfur iron ore must first undergo desulfurization treatment, otherwise it will increase smelting costs).

In the coal and coke industry, carbon content determines calorific value, while sulfur content affects whether sulfur dioxide pollution is produced during combustion. Analyzers can assist in determining fuel quality.

The performance of high-frequency infrared carbon and sulfur analyzers can directly affect product quality, production efficiency, and process optimization, and they play an irreplaceable role in promoting high-quality development in the manufacturing industry.