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煤炭化驗(yàn)中煤質(zhì)分析對煤樣有什么要要求

2016-01-15  來自: 鶴壁市華維科力煤質(zhì)儀器有限公司 瀏覽次數(shù):2028

根據(jù)GB/T 483-1998《煤炭分析試驗(yàn)方法一般規(guī)定》,》,分析煤樣一律按照GGB 474《煤樣的制備方制備。在制備煤樣時(shí),若在室溫下連續(xù)干燥lh后煤樣質(zhì)量變化不超過過o.1%,則為達(dá)到空氣干燥狀態(tài)。達(dá)到空氣干燥狀態(tài)的煤樣應(yīng)裝入嚴(yán)密的容器中,保持煤樣穩(wěn)定,以保證測試結(jié)果的穩(wěn)定性和可靠性。同時(shí),凡需根據(jù)水分測定結(jié)果進(jìn)行校正或換算的分析試驗(yàn),、能和水分測定同時(shí)進(jìn)行,否則也應(yīng)在盡量短的期限內(nèi)進(jìn)行(尤其是高水分煤),以保證煤樣水分不發(fā)生顯著變化,一般這一期限最多不超過7天。


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