Hi Gregor,

Do you intend measuring the moisture in the material going into the dryer, or coming out? The moisture at the output would appear to have very little variation and would probably not provide any significant information regarding energy control. The material would also be hot, and this may exclude near ifrared type measurement. We supply microwave online moisture analysers and would be happy to talk to you about such a system.

Regards

Jon Scarrott

www.lodestone-electronics.com

sales@lodestone-electronics.com ■

FRANZ LUDWIG GMBH

COMPANY FOR MOISTURE MEASUREMENT AND WATERDOSING COMPUTER / www.fludwig.com

Exhibitor at the: POWTECH, Hall 10 / Stand 424

BAUMA, Hall C1 / Stand 318

Dear Mr. Smitek,

fundementally it is possible to measure the moisture in Calcium carbonate with our moisture measuring systems. To serve you well please let us know more about your material which need to be measured or sent us a sample for pre-checking (quantity:

half bucketful) Also it would be very helpful to send us details (photo or sketch) of the requested installation place of the probe, if available. The material sample has to be sent to:

FRANZ LUDWIG GMBH

Budenheimer Str.1

D – 55124 Mainz, GERMANY

We hope to serve you well and are convinced to offer you the optimal technical solution.

With best regards

Andreas Ludwig

- managing director – ■

Hi Gregor,

CaCO3 is a material, which can be measured for H2O without problem. We have been involved in moisture measurement versus drying in blast furnace slag which was used as a cement addative. In this case we measured both the input and the output moisture. As you are probably aware, the energy to dry material can be split into two major groups, the first is the energy to bring the moisture up to boiling point and then the energy to create steam to drive the moisture out of the material. We used the input system to measure the moisture profile going into the dryer and calculate the nominal energy required.

We found that depending where the material was taken from in the stockpile the moisture could vary very considerably. This in itself can lead to very difficult control problems. Also resident time of material in the dryer can vary depending on moisture content and particle size distribution and can lead to confusing information which needs to be understood.

The output moisture monitor checks the final moisture content.

As I mentioned before, I am not sure that the output moisture measurement value would be suitable for control purposes. You really need "before the event" information in order to perform proper control.

We also found it very useful to log the data from the all the various transducers, including seasonal weather conditions, RH and air temperature and the like in order to be able to develop a control algorithm. Also useful is to monitor the stack temperature humidity and gas flow.

I would say that as long as the system was monitored closely, the energy consumption was reduced by an average of 20%.

You need good operaters who understand the process and can respond as and when required.

Hope this helps

Regards

Jon ■

Dear Mr Gregor SMITEK,

MINET,Mineral Energy & Technics Co.,Ltd. , is an enginering / consulting, trading and mining company involved mainly in the ceramics, glass, cement and mineral processing industries.

Please, find time to review an excellent solution to your demand as in the following; CALLIDAN MoistScan® Microwave Moisture meters have been designed to withstand the most demanding applications. They provide in line real time moisture analysis for a variety of different applications.The MoistScan® MA-500 and MA-600 have proven to be very compatible with applications within many industries such as Coal, Iron Ore, Pasta, Minerals, Sand and many more can be made more profitable using the Patented Technology in the Moist///Scan® Moisture Meter.

Being a sole agent of CALLIDAN/Australia, we will be pleased to assist you in selecting a relevant online moisture analyser.Please, check out this link to learn more detailed information about microwave moisture analysing principle:

http://www.callidan.com/docs/moistsc...tion-sheet.pdf

and application examples:

http://www.callidan.com/docs/APPLICA...version-10.pdf

Please, also download our 'SiteDataRequest' document by clicking here and then fill up according to your plant parameters in order for us to be able to offer you correct equipment : http://www.minet.com.tr/teknik/calli...ataRequest.doc

Hope to be of service to yourselves always. Awaiting your news soon.

Thanks in advance for your cooperation.

Kindest Regards,

Guven GULER

Technical & Project Manager

guvenguler@minet.com.tr

MINET Mineral Energy & Technics Products Industry and Trade Co., Ltd.

Kozyatagi Mahallesi, Kaya Sultan Sokak, No: 93, Kat:3 ,D:7

34742 Kadikoy/Istanbul/TURKIYE

Tel: +90 216 464 2820 Fax: +90 216 464 2819

http://www.minet.com.tr

GSM:+90 533 697 91 03 ■

Dear Sir,

we are going to set up power plant of 4x135 MW and input raw materials is middling coal.i am searching a vender for supply of moisture measurment with max measuring efficiency. our coal consumption will be around 700 tph,i want to be control on coal consumption by measuring the correct moisture in coal befor and after stock yard.

Kindly suggest us

rajesh verma ■

Jon,

I followed the link to the lodestone website and only found weighing systems!!!

Where is the moisture measurement equipment? ■

Gregor,

You might be interested in our unique method of sensing the moisture "inside-the-dryer." The Delta T sensor can be installed inside your dryer and with our control system, the moisture of the calcium carbonate can be controlled. This is possible as a result of a mathematical model derived from first principles that relates product moisture to the temperature drop of hot air after contact with the wet product (delta t) and the production rate or belt speed (S). The delta T term lumps the variables involved in drying the product. Therefore, you do not need entering moisture, outlet moisture, humidity of ambient. etc. The product and dryer system is instantaneously fitted to our Delta T model simply by bringing it up to or near the target moisture content, then switching from manual to auto. takes over and controls to the target moisture content in spite of changes in water load to the dryer.

John Robinson

www.moisturecontrols.com ■