QUALITY OF GROUPED CONVENTIONAL KILN DRYING OF THREE SPECIES OF Eucalyptus sp. WOOD

• Autor(a) principal: Batista, Djeison Cesar
• Data de Publicação: 2015
• Outros Autores: Klitzke, Ricardo Jorge, Rocha, Márcio Pereira da
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/19621
• topic: kiln drying; eucalypts; drying defects.; secagem artificial; eucaliptos; defeitos de secagem

The domestic industry commonly dries different species of eucalyptus in a same load because of the difficulty of identifying the species, hybrids and clones, and by optimizing the use of the kiln, too. However, this practice is not recommended in the literature. The objective of this study was to verify the quality of grouped conventional drying of Eucalyptus saligna, Eucalyptus grandis and Eucalyptus dunnii from clonal plantations. To this end, three loads were dried with the three species together in a pilot conventional dry kiln. The parameters used to analyze the quality of dried wood were final moisture content, end checks, surface checks, cupping, collapse, moisture gradient and drying stresses. Eucalyptus grandis showed the best quality of drying, followed by Eucalyptus saligna, and both species have potential to be kiln dried together. Eucalyptus dunnii had the worst quality of drying, and should not be kiln dried together with Eucalyptus grandis and Eucalyptus saligna. The basic density and shrink age were good parameters for the expected quality of the drying of eucalyptus species, in which less dense and more dimensionally stable species had better quality of drying. The drying schedule used must be modified to further drying of these species, especially regarding to uniformity and conditioning periods, which were considered insufficient.