Through washability study, a couple of parameters were investigated for a low volatile Pakistani Coal (coking). The aim was to find out the effect of the action of reducing material release characteristics for low vol...Through washability study, a couple of parameters were investigated for a low volatile Pakistani Coal (coking). The aim was to find out the effect of the action of reducing material release characteristics for low volatile Pakistani coal. The “Index of washability” (IW) and “Near gravity material Index” (NGMI) were used as parameters to express the ease of washability. Run of Mine coal is crushed to four different sizes as mentioned 80 mm, 30 mm, 18 mm and 11 mm in a pestle and mortar. Calculations of IW show that it is inversely proportional to top size of feed, indicating that washability increases with the decrease of size. From NGMI calculations it was concluded that gravity method is not recommended for separation at this specific gravity range. So study divulges that the critical specific gravity for crushing to 30 mm is 1.67 and for 11 mm is 1.56.展开更多
采用自制双环戊二烯改性聚酯树脂制备了一种低挥发VPI浸渍绝缘漆,测试了其综合性能和固化工艺特性,然后将低挥发VPI浸渍绝缘漆与玻璃布补强少胶云母带制备了模拟线棒并进行相容性测试。结果表明:该低挥发VPI浸渍绝缘漆的综合性能优良,...采用自制双环戊二烯改性聚酯树脂制备了一种低挥发VPI浸渍绝缘漆,测试了其综合性能和固化工艺特性,然后将低挥发VPI浸渍绝缘漆与玻璃布补强少胶云母带制备了模拟线棒并进行相容性测试。结果表明:该低挥发VPI浸渍绝缘漆的综合性能优良,固化挥发分低于3%,与配套的玻璃布补强少胶云母带相容性良好,介质损耗低,击穿电压达到52 k V,可适用于普通绝缘处理工艺及VPI浸渍处理工艺。展开更多
文摘Through washability study, a couple of parameters were investigated for a low volatile Pakistani Coal (coking). The aim was to find out the effect of the action of reducing material release characteristics for low volatile Pakistani coal. The “Index of washability” (IW) and “Near gravity material Index” (NGMI) were used as parameters to express the ease of washability. Run of Mine coal is crushed to four different sizes as mentioned 80 mm, 30 mm, 18 mm and 11 mm in a pestle and mortar. Calculations of IW show that it is inversely proportional to top size of feed, indicating that washability increases with the decrease of size. From NGMI calculations it was concluded that gravity method is not recommended for separation at this specific gravity range. So study divulges that the critical specific gravity for crushing to 30 mm is 1.67 and for 11 mm is 1.56.
文摘采用自制双环戊二烯改性聚酯树脂制备了一种低挥发VPI浸渍绝缘漆,测试了其综合性能和固化工艺特性,然后将低挥发VPI浸渍绝缘漆与玻璃布补强少胶云母带制备了模拟线棒并进行相容性测试。结果表明:该低挥发VPI浸渍绝缘漆的综合性能优良,固化挥发分低于3%,与配套的玻璃布补强少胶云母带相容性良好,介质损耗低,击穿电压达到52 k V,可适用于普通绝缘处理工艺及VPI浸渍处理工艺。
