PREFACE

This book is the continuation of my paper published in December 1980 by "GULA

INDONESIA", volume VI Nr. 4 (The Indonesian Sugar Magazine) under the title of:

"PEMERAHAN PADA SUATU GILINGAN"

(The extraction of a cane mill)

It is intended to expediently produce an idea of calculating mill material balance of a tandem,

whereas detailed calculations of materials passing through each of the mill in the train are

specifically described.

The idea came when the company Id worked for appointed me as a supervisor for the capacity

expansion one of the sugar factories owned. The expansion work covers the replacement of the

whole mill tandem with a bigger dimension. Therefore it was hopefully concluded that all

measurement, including the setting of the mills and all the analysis for the extracted juices and

the analysis of last mill bagasse, were purely and correctly implemented during the commis-

sioning.

With the help of a computer program, the repeatedly calculations of mass balance for a mill

tandem becomes very simple and specially eliminates the long lasting and time consuming work

when compared with the use of a calculator.

On the other hand the mill material balance can be calculated frequently within relatively short

time, especially at the beginning of a campaign when the milling operation already runs

smoothly. Which in turn itll give us opportunity to make any adjustment for the mill settings to

either achieve a better performance or steps for safety precaution against any mill breakage.

Surabaya, 30 April 2000