煤中黏土矿物对煤炭运输设备冻黏强度的影响

发布时间：2019-01-09 07:53

【摘要】：为分析煤中黏土矿物对煤炭运输设备冻黏强度的影响,选取不同矿的3种煤,通过XRD检测3种煤所含的主要黏土矿物分别为蒙脱石、绿脱石和伊利石,配制3种煤的精煤和在其基础上添加各自不同含量黏土矿物的煤样,以及同一种煤的精煤和在其基础上添加3种不同种类黏土矿物的煤样,应用研制的冻黏强度测试装置测试各煤样在常见基体Q235材料上的冻黏强度,结果表明:相比3种煤的精煤煤样,添加10%黏土矿物的3种煤煤样冻黏强度分别增加25.0%、22.1%、11.0%,添加20%黏土矿物的3种煤煤样冻黏强度分别增加47.4%、36.2%、24.4%,当添加黏土含量大于20%~30%时,3种煤的冻黏强度基本都不再增加;对于同一种煤,在其冻黏强度随黏土含量增加阶段,添加等量蒙脱石、绿脱石,煤样的冻黏强度增幅程度高于添加伊利石的煤样。煤中黏土矿物可增强煤的亲水性,使煤冻黏强度在一定范围内随黏土含量增高而增加;蒙脱石、绿脱石的亲水性高于伊利石,对煤冻黏强度影响更大。
[Abstract]:In order to analyze the influence of clay minerals in coal on the frozen viscosity strength of coal transport equipment, three kinds of coal from different mines were selected, and the main clay minerals in three kinds of coal were detected by XRD: montmorillonite, green demineralization and Illite. The coal samples of the three kinds of coal concentrate and the clay minerals with different contents on the basis of which, and the coal samples of the same kind of coal and three different kinds of clay minerals added on the basis of the same coal, are prepared and added on the basis of the three kinds of clean coal and the coal samples with different contents of clay minerals on the basis of which, The frozen viscosity strength of each coal sample on the common matrix Q235 material was tested by using the developed test device. The results showed that the frozen viscosity strength of the three coal samples added 10% clay mineral increased 25.0%, respectively, compared with the three kinds of clean coal samples of three kinds of coal. 22.1During 11.0%, the frozen viscosity strength of the three coal samples with 20% clay minerals increased by 47.4% and 36.2% and 24.4% respectively. When the clay content was more than 20% ~ 30%, The frozen viscosity strength of the three kinds of coal is no longer increased; For the same kind of coal, when the frozen viscosity strength increases with the increase of clay content, the addition of the same amount of montmorillonite, green demineralization and coal samples is higher than that of the coal sample with the addition of Illite. Clay minerals in coal can enhance the hydrophilicity of coal, and the frozen viscosity strength of coal increases with the increase of clay content in a certain range, and the hydrophilicity of montmorillonite and chlorite is higher than that of Illite, which has a greater influence on the frozen viscosity strength of coal.
【作者单位】：辽宁工程技术大学机械工程学院;沈阳航空航天大学机电工程学院;
【分类号】：TD57;;TD528

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