Saiccor - The First 50 Years 5.8 MB - Sappi

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The Mazery Period (1989–1996) PM4 drying machine 1995, ending a 37-year-old enterprise that never quite achieved the success its originators envisaged� The Mkomazi project was completed on time and within budget – the final cost of R856 million was some R100 million below budget, largely as a result of lower than anticipated prices for the main equipment (here credit is due to the commercial team of Ian Heron, Roland Mazery, Mike Turner and Roy Sukaram)� Although No 4 continua started up well, sheet breaks began occurring after two months and increased significantly over the next two months� By June 1995, the problems had been identified as resin on the wire, causing it to vibrate, and inadequate mixing of pulp and The magnesium and Mkomazi plants dominate the Saiccor skyline 157
The First Fifty Years water in the fan pump-mixing tank, leading to folding of the sheet out of the dryer� The first problem was solved in the short term by washing the wire regularly with paraffin and in the long term by changing the type of vacuum boxes and the material of their covers� Increasing the pulp velocity into the mixing tank solved the mixing problem� By July 1995 the production from No 4 continua started increasing, reaching design levels by August� No 3 bleaching experienced few start up problems� The mill averaged over 1 600 t/d for a month for the first time in November 1995� Towards the end of 1994 it was agreed to add two complimentary projects to Mkomazi� First, to replace the old open effluent channel from the factory to the pumphouse (3,5 km) with a pipeline (new pumps to be located within the factory) at a cost of R45 million, and, second, to automate the digester operations at a cost of R30 million� Stainless steel for the 900 mm diameter effluent pipe was made by Columbus, the pipeline was manufactured by Hall Longmore and the installation was carried out by Rotek (albeit very slowly)� Mike Bentley and Kevin Cox managed the project with CBI as consultants� The new effluent pumps and pipeline were in operation from 12 February 1996� For the digester automation all valves had to be automated� At the same time Andy Stretton drew up a functional specification detailing every phase of the digester operation which Don Wheeler and ABB (largely Paul Turco, son of Ennio and Sheryl) translated into ABB software for the new ABB control system� Richard Johnson of ABB transferred the old Accuray control system into the new ABB system� The first digester was automated in January 1996, the others slowly followed, and the last (No 15) was completed on 11 October 1996� Dissolving pulp prices started rising at an unprecedented rate in the second half of 1994 from a low of $490 per ton to record heights of $1 100 per ton in the last quarter of 1995� The commissioning of the Mkomazi plant was perfectly timed (‘happenstance’) to take Mike Bentley (LEFT) and Kevin Cox 158
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Saiccor The First Fifty Years Sincl
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Foreword In the typical Sinclair St
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Contents References vi Acknowledgem
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Acknowledgements During the course
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The Cantacuzene Period (1952-1965)
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The Yeomans’ Period (1966-1967) T
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The Yeomans’ Period (1966-1967) T
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The Yeomans’ Period (1966-1967) t
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The Yeomans’ Period (1966-1967) D
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The Wharton Period (1968-1970) The
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The Wharton Period (1968-1970) No 5
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The Wharton Period (1968-1970) outp
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The Wharton Period (1968-1970) The
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The Tainton Period (1971-1983) The
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The Tainton Period (1971-1983) with
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The Tainton Period (1971-1983) majo
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The Tainton Period (1971-1983) Prod
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The Tainton Period (1971-1983) In t
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The Tainton Period (1971-1983) As a
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The Tainton Period (1971-1983) Ther
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The Tainton Period (1971-1983) Any
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The Tainton Period (1971-1983) Reti
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The Tainton Period (1971-1983) nego
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The Tainton Period (1971-1983) hesi
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The Tainton Period (1971-1983) four
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The Tainton Period (1971-1983) it w
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The Dell Period (1983-1985) The Del
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The Dell Period (1983-1985) The pro
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The Dell Period (1983-1985) he was
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Saiccor - The First 50 Years 5.8 MB - Sappi

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