Cement Analysis Method: XRF Spectrometry

Cement Analysis Application InfoThe following is the introduction section of an Application Brief that details Oxford Instruments X-Supreme8000 for the rapid, cost-effective analysis of cement and cement making material.  This features the XSP-Cement analyzer package to comply with ASTM C114.

Routine chemical analysis is an essential part in controlling the manufacturing of cement, from the full analysis of raw materials to testing each stage of the process.  In a traditional system, natural minerals like limestone and clay form the raw mix that goes into the kiln for firing by coal, oil, or natural gas to produce clinker.  Control of the basic reaction requires accurate analysis for at least calcium, silicon, aluminum, and iron in the raw meal.  Calculations using these four elements (sometimes including sulfur) provide the required production control parameters such as lime saturation factor (SLF) and silica ratio (SR).  Analysis of the clinker requires the same elements as for the raw meal, but control of the addition of gypsum during the final milling stage only requires the measurement of sulfur content.

Waste materials are increasingly being used in the cement making process, bringing about many changes.  When they contain the main cement making components, waste materials can replace some of the natural raw materials and combustible wastes can help from the kiln.  This means more testing of the incoming raw materials, both during the process and in the final product.  Thus, for a cement plant to compete in today's cost conscious market, its analytical capabilities must be extensive, cost-efficient, and flexible.

XRF for Cement Analysis OverviewIt is important that any new analytical methods required for this type of analysis fit easily into existing procedures.  X-Ray fluorescence (XRF) spectrometry is one of the simplest instrumental techniques for analysis in a cement works because the sample preparation is simple.  For many years, bench-top energy dispersive x-ray fluorescence (ED-XRF) spectrometers have been used successfully as a quality control tool in cement plants to control incoming material as well as production samples.

XSupreme8000 XRF for Cement TestingEastern Applied offers Oxford Instruments XSupreme8000 for cement analysis interests.  When compared to other analyzers, this high performing ED-XRF spectrometer successfully performs a wider range of elemental analysis required in the cement making industry.  The X-Supreme8000 is the perfect analyzer for the rapid multi-element determination of cement making materials - and now includes sodium with the flexibility for additional elements such as chlorine in raw meals, etc.  The new level of performance has been achieved using Oxford Instruments unique Focus SD Technology.

Sections included in the application brief:
          Instrument Overview
          Sample Preparation and Presentation
          Calibration
          Quality Control and Instrument Correction
          Performance and Results

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Cement Testing Results with XRF Spectrometery