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Metal element analyzer

The analysis of carbon and sulfur in metal smelting is very important. The carbon and sulfur elements are important elements in determining the specifications and quality of steel products. Therefore, the carbon and sulfur analyzer of metal element analyzer is used in steel production, in order to improve the accuracy of analysis. Accuracy, work factors found in the work practice, there are instrument hardware problems, but also analytical methods. The following describes the interference of standard substances and water.

Reference material: Our experience is: analysis of what materials, standard materials of what materials, preferably similar components, similar content. It also uses the calibration of national first-class reference materials produced recently. This calibration helps improve accuracy and accuracy. For example, the analysis of the alloy steel standard for carbon steel is calibrated, and the result is high because of the difference in composition, which causes different decomposition characteristics. However, for the steel standards of 10 ^-6 carbon content, there is no commodity for sale at home and abroad, suitable for calibration materials, and research is still being carried out according to different ideas.

Sucrose completely decomposes within 30s, and the peak is sharp. It accounts for less than 1% of CO, which is similar to the proportion of steel sample analysis. At the same time, the use of sucrose solution can ensure the accurate addition of trace amounts of carbon when drawing the working curve. This is a compound that can be easily used in ultra-low carbon analysis. The amount of standard-added sample is equivalent to ^10-6 grades calculated by 1g. Both input weights of 1.000g.

With the same standard, although there are drawbacks, but in desperation, there are many applications in the actual work.

Water interference problem: Water not only affects the determination of carbon, but also has a greater impact on the determination of sulfur. Therefore, there is often a water removal device on the infrared analysis instrument. Water comes from wet water, crystal water, meteorological water, and water. The first two can be removed by baking in 1-3 h in an oven at 120 ° C and 300 ° C. Meteorological water is related to the humidity of the air. In the rainy season, the air humidity is above 90%. The furnace is turned on, and the humid air enters the analysis system and attaches to the system wall, which affects the determination of sulfur. To solve this problem, it is necessary to pre-burn the sample for more than 10 times, and use hot gas to drive away the wet water. This method is troublesome. Another method is to add a desiccant and pre-burn 3 times to be effective.

The generated water is related to the characteristics of the sample, such as silicone rubber, and organic substances such as petroleum products. The sample is a compound containing hydrogen. During the process of oxy-combustion, hydrogen and oxygen can form water, which affects the determination of sulfur.

For the determination of sulfur in organic products such as petroleum products, there is still a problem with the addition of anti-wetting agent. It is necessary to add another water removal device in the analysis system, and it is easy to change and replace. The water removal device is replaced once for each sample, which is troublesome. But the test results are still good.

The metal element analyzer has many factors affecting the accuracy and accuracy of the carbon-sulfur analyzer. We only pay attention to the operation method when analyzing as much as possible, and reduce the various interference factors as much as possible to get the accuracy and accuracy of the analysis. Improve to ensure the production of better quality steel products.