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Quality and energy requirements of pulp produced from pulpwood with varying levels of sawmill chip contents - Applications at Iggesund Paperboard

A mill trial was performed at the Iggesund Paperboard Workington site, comparing the quality and energy requirements of pulp produced from pulpwood with varying levels of sawmill chip contents.

The mill trial findings were that the variation in wood density and fibre length in practice was less than had been measured for the more extreme wood sorts in the lab refining study, and in the pilot trials. This result followed through to the pulp test results, which showed a smaller difference with sawmill chip content than had been seen in the lab and pilot trials.

The most likely explanation for this result is that the earlier studies were aimed at measuring the extremes of wood density and fibre length within the trees. The mill trial was performed using the available wood resources, which, as a result of the forestry practices in the UK, do not show the same levels of variation.

This result allows the Workington mill greater flexibility when selecting wood materials to be used in the pulpmill, since the quality achieved from roundwood and sawmill chips were quite similar. It is hoped that this will also allow greater efficiency in utilising the available wood sorts.

Contacto

Lorna CASSON, (Process Technologist)
Tel.: +44-1900-600311
Fax: +44-1900-604462
Correo electrónico
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