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High speed carbon sulfur analyzer

Writer:公司Source:公司 Number of visits: Date:2016-6-22
     High speed carbon sulfur analyzer is of an important instrument in iron and steel carbon, sulfur content, and burning method for determination of carbon and sulfur additive selection is a problem worthy of note, followed by a brief introduction under high frequency furnace commonly used additives.
   The requirement of high frequency induction furnace for high speed carbon sulfur analyzer:
   1, the use of additives as far as possible as far as conductive magnetic materials, in the combustion process is an exothermic reaction, it is formed with the sample oxide melt flow. Volatile matter does not adsorb CO2 and SO2.
   2, additives in carbon, sulfur content to low, <0.001% (C) <0.0005%, (S). The smaller the value of carbon and sulfur, the better.
   3, the additive and the sample oxidation melting, no corrosion of the crucible, so as to avoid cracking and leakage of the crucible in the combustion process.
   4, additive tungsten particle size as far as possible between 0.84-0.42mm, porosity 15% or so, the surface is compact and smooth, so that the oxygen flow can be prevented, and the rapid oxidation of combustion, can also reduce the surface adsorption.
   Tungsten particle additive:
   Tungsten particles are commonly used in high frequency furnace, and its characteristics are as follows.
   1, tungsten is difficult to melt the metal, its melting point is 3380. Thus, the commonly used tungsten lamp, it can be used as additives, because of easy oxidation of tungsten.
   2, tungsten particles in the temperature is higher than 650 degrees Celsius, oxygen, began to oxidize and send a lot of heat.
   W+3/2O2=WO3, Delta H=-840.11kJ/mol
   The reaction has the characteristics of high calorific value and fast reaction rate, and the WO3 is loose.
   3, WO3 is an acidic oxide, it is conducive to the formation of CO2 and SO2 release, the melting point of 1473 degrees Celsius, the boiling point of about 1750. WO3 has an important characteristic, that is, the temperature above 900 degrees C has a significant sublimation, there are some WO3 volatile. Due to the escape of WO3, the diffusion rate of carbon and sulfur is increased, and the carbon and sulfur in the sample are fully oxidized. Volatilization of WO3 in the 700-800 DEG C and transformation for the solid phase, covering the pipe remaining Fe2O3, preventing the conversion of SO2 conversion to SO3, to prevent the adsorption of sulfur pipeline, so as to ensure the reliability of the result of the analysis of carbon and sulfur. In addition the tungsten low blank value, can be used for the determination of low carbon and sulfur. Therefore, the tungsten particle additive has been widely used in high frequency furnace combustion.
High-speed carbon sulfur analyzer high-frequency induction furnace additive selection is very important, so additives for high  frequency induction furnace has it is necessary to understand, I hope described above to help, national toll free hotline: 400-680-6358
Nanjing Ning Bo Analytical Instrument Co., Ltd.
2016.6.21

TypeInfo: Industrial News

Keywords for the information:Carbon sulfur analyzer