文献类型：期刊文献

中文题名：米老排锯材干燥中试研究

英文题名：Pilot-scale Experiment on the Drying of the Sawn Timber of Mytilaria laosensis

作者：刁海林[1] 唐继新[2] 唐贤明[1] 郑华庭[1] 白灵海[2] 罗建举[1]

第一作者：刁海林

机构：[1]广西大学林学院;[2]中国林业科学研究院热带林业实验中心

年份：2012

卷号：27

期号：6

起止页码：168-173

中文期刊名：西北林学院学报

外文期刊名：Journal of Northwest Forestry University

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2011_2012】；

基金：广西林业重大招标项目(桂林科字[2009]第7号)

语种：中文

中文关键词：米老排;锯材;干燥基准;中试

外文关键词：Mytilaria laosensis; sawn timber; drying benchmark ;pilot-scal test

分类号：S781.71

摘要：进行米老排(Mytilaria laosensis)锯材干燥中试,验证中试干燥基准的正确性,以求获得适于米老排生产应用的干燥基准。采用生产中广泛使用的强制气流循环普通干燥窑,在给定的中试干燥基准下对米老排锯材实施中级干燥试验,并按照国家标准(GB/T 6491-1999)进行锯材干燥质量评定。试验结果表明:米老排锯材干燥产品的平均终含水率7.5%;厚度含水率偏差为0.91%;应力指标4.06%;平均顺弯度为0.36%,横弯度为0.14%;扭曲度为0.29%;瓦弯度为2.54%;纵裂度为4.79%;截面收缩率为0.19%;无内裂。干燥至含水率12%时所用时间为224h(9.33d);干燥速度为0.36%·h-1。锯材总体干燥质量等级为二级,达到木制品生产对米老排锯材干燥质量的要求。
A pilot-scale test on the drying of the sawn timber of Mytilaria laosensis was carried out to exam- ine the accuracy of the Chinese drying schedule. A widely applied drying kiln with a forced air circulation system was adopted to implement intermediate level drying with a given test drying schedule. The quality of the dried sawn timber was evaluated according to national standard （GB/T 6491-1999）. The related pa- rameters of the dried M. laosensis sawn timber were as follows： average final moisture content： 7.5% thickness moisture deviation： 0.91%; stress index. 4.06%; average longitudinal bending degree.. 0.36; lateral bending degree： 0.14% distortion degree： 0.29~ tile shape bending degree： 2.54%longitudi- nal cracking degree： 4.79% ; cross section shrinkage rate： 0.19%. No internal crack was observed. The time of drying to a water content of 12% was 224 h （9.33 d） ; drying speed was 0.36%· h ^-1. The overall drying quality of sawn timber achieved grade two, indicating that the quality of M. laosensis sawn timber after drying could meet the production requirements.