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煤的可磨性測定

发布时间：2011-10-17 点击次数：1559次

煤的可磨性是动力用煤和高炉喷吹用煤的重要特性。它是表征燃煤制粉的难易程度。特别是在火力发电厂，煤的可磨性指数使煤粉制备工艺和设备的设计及预测磨煤机出率（t/h）和電廠內部能源消耗時必不可少的依據。因而在煤質研究和檢驗工作中，煤的可磨性是一個重要參數。

测定煤的可磨性指数目前国内外普遍采用哈德罗夫法（简称哈氏法）。由于该方法适用于大多数煤种，且仪器结构紧凑、使用方便、结果重现性好，于1981年被采用爲國際標准方法。

哈氏法的方法要点是将煤样制成规定的粒度，经哈氏可磨性测定仪研磨后，在规定条件下筛分，称量筛上煤样的质量，由研磨前煤样质量减去筛上煤样质量得到筛下煤样质量，从标准煤样绘制的校准图上查的哈氏可磨性指数。

儀器設備：

1、哈氏可磨性測定儀

2、試驗篩

3、保護篩

4、振篩機

5、天平

6、托盤天平

7、二分器

8、破碎機

注：詳細的數據及測定方法可詳看國家標准GB/T2565

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