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哈氏可磨性指數測定儀

发布时间：2009-09-29 点击次数：1809次

哈氏法適用于大多數煤種，測定結果基本符合工業磨煤機的實際情況，而且操作簡便，重現性好，所以爲世界許多國家普遍采用。這種方法的缺點是，對年輕褐煤的測定結果與實際生産不相符合。這主要是由于褐煤一般含水量較高，在哈氏儀中研磨時易粘結而影響測定。哈氏法不適用于年輕褐煤。

哈氏可磨性指數測定儀是试验用的主要设备，其主要的技术要求是：

1、总垂直力：284±2N

2、转速：20±1r/min

3、转数：60±0.25r

4、研磨件的几何形状、尺寸、材质和加工工艺都有严格要求。

總垂直國是指由重塊、齒輪、主輪和研磨環施加在鋼球上的力，要求該力均勻地施加在8個鋼球上。因此，操作中應把研磨碗上平。爲保證儀器有較高的精確度，儀器的轉速不能隨意改變。

儀器運轉60±0.25r後自動停止，每台儀器上都有固定的啓動位置，測定之前必須檢查，以保證轉數准確。

我公司生産的HM-60型哈氏可磨性指數測定儀是在H78-1的基礎上改良過的，帶有上碗裝置，大量試驗證明，它們的測定結果與國際標准儀器的測定結果無顯著性差異。

試驗篩的孔徑爲0.071mm.,0.63mm,1.25mm,1.6mm。

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