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News

XENA & XRD, on-line analysers for cement industry

CSIRO : 11 February, 2000  (Technical Article)
CSIRO has developed a set of on-line analysers as part of an ambitious 3-year program by Adelaide Brighton Management Ltd to improve processing in the Australian cement industry.
CSIRO worked in collaboration with Fuel and Combustion Technology Ltd to develop two key on-line analysis systems, an on-conveyor belt bulk elemental analyser for the raw materials, and an on-line analyser for determining the composition and phases in the cement.

These analysers are designed to improve cement processing in the Australian cement industry and have potential for other industries and overseas markets. The analysers will be marketed in Australia and overseas by FCT.

To help control the raw mix composition of cement, the CSIRO X-belt analyser can be positioned directly on the conveyor belt transporting the raw material to the mill.

XENA can accurately measure the concentrations of calcium, silicon, aluminium, iron and minor elements independent of both horizontal and vertical segregation and independent of changes in belt loading. XENA is based on a newly-developed fast neutron and gamma ray technique that uses highly penetrating radiation so that measurements can be averaged over a large volume of material on a conveyor belt.

A prototype commercial analyser was installed at the ABML Birkenhead plant early in 1999.

A second analyser measures the composition and mineralogy of finished product cement in real time and on-line. It is based on X-ray diffraction techniques and Rietveld analytical methods. The analyser has been tailored to the specific needs of Adelaide Brighton, especially that of continuous sample flow. Data collections are very rapid as it detects the whole diffraction pattern simultaneously. This improves particle statistics and alleviates sample-related problems such as preferred particle orientation.

A prototype commercial analyser was installed at the ABML Birkenhead plant early in 1999. Information from the analyser will be used as part of a sophisticated control system based on strength prediction of cement product as it is being produced.
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