树脂浸渍是提高速生木材力学性能、改善尺寸稳定性的重要技术手段。以纺织整理剂2D树脂为交联改性剂、聚乙二醇(PEG-1000)为充胀剂,通过真空加压浸渍对速生杨木实木板材进行改性处理,研究2D树脂的浸渍-干燥-固化工艺及其对改性杨木板材...树脂浸渍是提高速生木材力学性能、改善尺寸稳定性的重要技术手段。以纺织整理剂2D树脂为交联改性剂、聚乙二醇(PEG-1000)为充胀剂,通过真空加压浸渍对速生杨木实木板材进行改性处理,研究2D树脂的浸渍-干燥-固化工艺及其对改性杨木板材的力学性能、干湿尺寸稳定性、漆膜附着力等性能的影响。结果表明:随着2D树脂浸渍时间的延长,木材的质量增加率逐渐提高,弦向和径向硬度增大,木材的干缩湿胀率降低,浸渍处理2h后趋于平衡。此时,试件的弦向和径向硬度分别为3.318和3.247 k N,分别是素材试件的1.34和1.67倍;试件的静曲强度和弹性模量分别为114.64和9 930 MPa,分别是素材试件的1.26和1.8倍;试件表面耐磨性和漆膜附着力也得到明显改善。展开更多
Investigations were carried out, on a low grade siliceous iron ore sample by magnetic separation, to establish its amenability for physical beneficiation. Mineralogical studies revealed that the sample consists of mag...Investigations were carried out, on a low grade siliceous iron ore sample by magnetic separation, to establish its amenability for physical beneficiation. Mineralogical studies revealed that the sample consists of magnetite, hematite and goethite as major opaque oxide minerals where as silicates as well as carbonates form the gangue minerals in the sample. Processes involving combination of classification, dry magnetic separation and wet magnetic separation were carried out to upgrade the low grade siliceous iron ore sample to make it suitable as a marketable product. The sample was first ground and each closed size sieve fractions were subjected to dry magnetic separation and it was observed that limited upgradation is possible. The ground sample was subjected to different finer sizes and separated by wet low intensity magnetic separator. It was possible to obtain a magnetic concentrate of 67% Fe by recovering 90% of iron values at below 200 lm size.展开更多
文摘树脂浸渍是提高速生木材力学性能、改善尺寸稳定性的重要技术手段。以纺织整理剂2D树脂为交联改性剂、聚乙二醇(PEG-1000)为充胀剂,通过真空加压浸渍对速生杨木实木板材进行改性处理,研究2D树脂的浸渍-干燥-固化工艺及其对改性杨木板材的力学性能、干湿尺寸稳定性、漆膜附着力等性能的影响。结果表明:随着2D树脂浸渍时间的延长,木材的质量增加率逐渐提高,弦向和径向硬度增大,木材的干缩湿胀率降低,浸渍处理2h后趋于平衡。此时,试件的弦向和径向硬度分别为3.318和3.247 k N,分别是素材试件的1.34和1.67倍;试件的静曲强度和弹性模量分别为114.64和9 930 MPa,分别是素材试件的1.26和1.8倍;试件表面耐磨性和漆膜附着力也得到明显改善。
文摘Investigations were carried out, on a low grade siliceous iron ore sample by magnetic separation, to establish its amenability for physical beneficiation. Mineralogical studies revealed that the sample consists of magnetite, hematite and goethite as major opaque oxide minerals where as silicates as well as carbonates form the gangue minerals in the sample. Processes involving combination of classification, dry magnetic separation and wet magnetic separation were carried out to upgrade the low grade siliceous iron ore sample to make it suitable as a marketable product. The sample was first ground and each closed size sieve fractions were subjected to dry magnetic separation and it was observed that limited upgradation is possible. The ground sample was subjected to different finer sizes and separated by wet low intensity magnetic separator. It was possible to obtain a magnetic concentrate of 67% Fe by recovering 90% of iron values at below 200 lm size.
