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煤樣的制備方法

发布时间：2010-03-25 点击次数：2019次

注：續www.mzfxyq.com.cn 上的《煤樣的制備方法》

3 術語和定義

GB 475規定的術語及定義和以下術語及定義適用于本標准。

3．1

制樣 samplepreparation

使煤樣達到分析或試驗狀態的過程。

注：試樣制備包括破碎、混合、縮分，有時還包括篩分和空氣幹燥。它可分成幾個階段進行

3．2

試樣縮分 sampledivision

将试样分成有代表性、分离的部分的制樣过程。

3．3

定質量縮分 fixedmassdivision

保留的試樣質量一定、並與被縮分試樣質量無關的縮分方法。

3．4

定比縮分 fixedratiodivision

以一定的縮分比、即保留的試樣量和被縮分的試樣量成一定比例的縮分方法。

3．5

切割樣 cut

初级采样器或試樣縮分器切取的子样。

3．6

切割器 cutter

切取子樣的設備。

GB 474·——2008

3．7

試樣破碎 samplereduction

用破碎或研磨的方法减小试样粒度的制樣过程。

3．8

空氣幹燥 air·drying

使試樣的水分與其破碎或縮分區域的大氣達到接近平衡的過程。

3．9

空氣幹燥状态 air·dried

煤樣在空氣中連續幹燥1 h後，煤樣的質量變化不超過o．1％时，煤样达到空氣幹燥状态。

制樣总则和制樣精密度

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