The MOISTSCAN
moisture analyser range has proven to be very compatible with
applications within the Nickel Industry.
Typically the MOISTSCAN
obtains an instrument precision of 0.7% for products
which have a moisture range of 25% - 40%.
Typical application use for the Moistscan® include:
De-watering
circuits such as for the input to kiln dryers
Plant
feedback by analysing the output of the kiln dryer
ROM applications for metallurgical accounting
Loading Ports and train load outs for commercial and
contractual purposes.
Measurement of nickel carbonate within the process
Clients involved with the MOISTSCAN
currently include, SLN Nickel (New Caledonia) ,
Votorantin Metatis (Brazil) and BHP Billiton. The QNI
staff use the analyser constantly for metallurgical
accounting.
Queensland Nickel Plant's use of
Moistscan's Microwave technology.
One of the most recent examples of Moistscan's accuracy was
the analysis of its performance
on site at Queensland Nickel Pty Ltd. (QNI). Located in Yabulu near Townsville, QNI is a subsidiary of BHP Billiton Ltd and refines laterite nickel ore to a range of nickel
products as well as producing cobalt.
The annual production capacity is 30,000 tonnes of nickel and 2,000
tonnes of cobalt.
It is important the ore is dried to a consistent moisture level as
variations can lead to process instability and unnecessary losses.
There is also a need for moisture measurement to obtain a mass balance
and for metallurgical accounting purposes.
The stockpiles are open to the weather and hence variation in moisture
content on receipt at the drier.
The ores are very difficult to handle, having a claylike texture
resulting in an inconsistent feeding system onto the belt which in
turn causes continual changes in the ore profile.
This results in significant surging of the material.
The nickel ore also tends to agglomerate into lumps when wet and this
tendency is heightened by increased moisture content.
RESULTS
The Moistscan performance was verified by taking two samples from
the moving conveyor and analysing each sample in different
laboratories.
This sample was then compared with the one minute rolling average of
the Moistscan analyser.
The conclusion of the sample program was that the Moistscan displayed
an equivalent accuracy to that of either laboratory.
The microwave technique has been shown to be precise and reliable in
providing moisture measurements in a number of other applications.
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DAIRY
MOISTURE METER
