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根据不同熔融性和不同的矿物质组成对14种煤进行系统归类,利用硅酸盐相图理论解释混煤结渣的原因。并根据矿物组成,寻找不同类别煤种之间配煤的熔融性规律,探讨了选择合适煤种配煤使混煤灰熔点提高的配煤方法。同时,还设计了一种判别配煤效果的方法:T-φ法(T表示混煤灰熔点的软化温度,φ表示混煤熔点与低熔点煤之间的温度差,根据这2个指标,确定混煤灰熔点在坐标轴中的位置,判断配煤效果的好坏)。文中以灰熔点作为判断煤灰结渣倾向的标准。实验结果表明:由于配煤使灰中的成分更复杂,低温共熔现象更易发生,因而配煤总体是一个降低灰熔点的过程;但是将煤种分类,不同类别之间合理掺配能改善这种状况。富含勃姆石的高熔点的煤种参与配煤,能确保使混煤灰熔点一定高于低熔点煤;其他类型的高熔点煤,参与配煤后混煤灰熔性各异,并大体呈降低的趋势;中等熔点煤和低熔点煤混煤熔点一致呈现出低于2种单煤的规律;2种低熔点煤混合不能得到高熔点混煤的结果。
Fourteen kinds of coal are systematically classified according to different fusibility and different mineral compositions, and the reason of mixed slagging is explained by the silicate phase diagram theory. Based on the mineral composition, the law of the fusing of coal blending between different types of coal is explored. The coal blending method of choosing appropriate coal blending to improve the melting point of mixed coal is discussed. At the same time, a method to determine the effect of coal blending is also designed: T-φ method (T represents the softening temperature of the mixed coal ash melting point, φ represents the temperature difference between the mixed coal melting point and low melting coal, according to these two indicators, Determine the location of coal ash melting point in the coordinate axis to determine the quality of coal blending). In this paper, ash melting point as a criterion to determine the slagging tendency. The experimental results show that the coal blending is a process of reducing the ash melting point due to the more complex composition of the ash and the low-temperature eutectic phenomenon. However, the classification of coal species and reasonable blending between different types can improve this Kind of condition High-boiling coal boehmite rich in coal blending, to ensure that the melting point of mixed coal ash must be higher than the low melting point of coal; other types of high melting point coal, after blending coal blending ash fusion, and generally The melting point of middle-grade coal and low-grade coal is the same as that of two kinds of single coal. The mixture of two low-melting-point coal can not get the result of high-melting coal.