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浙江無煙煤濾料性能指標

發布時間:2019-06-25
  1.水份:是煤中無用成分,同時還影響煤的發熱量和可磨性。因此,無論是對煉焦用煤或對蒸汽用煤來講,它都是一個重要的指標。對于用戶來講,具有實際意義的是應用基水份,既從洗煤廠運到工廠時的煤炭所含有的水份。關于煤的水份含量的極限,還沒有統一的限制。水份的大小隨當地條件和運輸距離而定。對于外銷煤炭,裝船時允許的水份一般為6-8%。由于水份就煉焦煤來說是無效的,它還需熱量使其蒸發,同時還會降低煉焦爐裝煤容量,因此越低越好。某些新型煉焦爐在裝煤前進行預熱,雖然增高了費用,但能顯著地提高生產率。另一方面,如果煤太干時。也會產生問題;尤其是在風大的地區,裝卸時煤粉會污染環境。而適于生產無煙煤濾料要求無煙煤的水分是小于2%。

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浙江無煙煤濾料性能指標

  3.固定碳:是美國作煤炭分級的一個普通指標。由于固定碳是全部真正的碳,其含量的多少,對于焦炭是很重要的。適于煉焦的煤炭,固定碳限于69-78%。而適于生產無煙煤濾料的無煙煤要求固定碳大于80%。
  4.元素分析:隨煤階的增加,即煤化程度的加深,碳含量逐漸增加,氧含量逐漸減少。褐煤和較低品級的煙煤,氫含量穩定在大約5%左右;較高品級的煙煤和無煙煤氫含量降至3-4%。氫含量隨煤階的增加而減少,是與揮發分減少有關。煙煤的氮含量,大約是1.7%;較低煤階和較高煤階的氮含量要低一些。碳是煤中最重要的元素,完全是碳含量提高了焦炭的價值。但高氧煤則只能煉出質量較次的焦炭。

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