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化驗流程詳細操作步驟

发布时间：2010-01-21 点击次数：2356次

第一步：取樣    五點取樣法
要領，按對角線取五個點，不要表層，每點一鐵鍁共取一桶。
使取的煤樣盡量具有代表性，隨機取樣。將取的的煤樣拌勻，分選，最後留下一公斤左右作爲待化驗煤樣，如果有塊煤請挑選出過破碎機。
第二步：化驗水分
采過來的煤第一步需要做水分，也就是煤的外水。
所需器皿：稱量瓶電子天平幹燥箱化驗方法和公式如下
先將幹燥箱打開，將溫度升到150度，在天平上將稱量瓶稱出，記下皮重。再稱出10--11克煤記下煤重。在幹燥箱裏烘1個小時，取出後涼涼，在天平上稱出重量記下烘過後的重量。公式如下：

第三步：烘幹制樣
用不鏽鋼盤子裝上大概200克左右的煤樣在幹燥箱裏烘幹，150度烘大概30分。幹燥後在制樣機裏研磨制成煤樣，以下所有的項目均是制過樣後的煤。
第四步：做硫，安說明書操作。
第五步：灰分
先將爐子升到850度，程控按說明書操作。在天平上稱出灰皿的重量，記下皮重。再稱出1克左右的煤樣，記下煤重。打開高溫爐爐們，將稱好的煤樣慢慢推入到爐子裏，燒不低于40分鍾的時間。
要點1，推入過程要慢，煤不能爆燃。要點2，燒的時間要足夠。公式如下：

第六步：揮發份
先將爐子升到900度，程控按說明書操作。在天平上稱出坩埚的重量，記下皮重。再稱出1克左右的煤樣，記下煤重。打開爐門，迅速將稱好的煤放入爐子裏。看表，七分鍾後取出，晾晾，稱出燒過後的重量。



第七步：發熱量   按說明書操作。

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