Chestiuni care necesită atenție la arderea cuptorului cu mufă:

(1) Proba din barca de porțelan ar trebui să fie plată, iar grosimea probei nu trebuie să fie prea mare;

(2) When ashing, the furnace door can be opened, and the porcelain boat containing the sample on the heat-resistant plate is slowly pushed into the furnace mouth of the box-shaped muffle furnace, and the sample in the porcelain boat is slowly ashed and smoked. After a few minutes, when the sample no longer smokes, slowly push the porcelain boat into the hot part of the muffle furnace, and close the furnace door to burn the sample at 815±15. If a coal sample catches fire and ignites during the ashing process, the coal sample is discarded and must be re-weighed for ashing.

(3) Cuptorul cu mufă ar trebui să aibă un coș de fum sau orificii de ventilație, astfel încât proba de cărbune să poată îndepărta produsele de ardere și să mențină circulația aerului în timpul procesului de ardere.

(4) The control system of the muffle furnace must indicate accurately. The temperature rise capacity of the muffle furnace must meet the requirements for ash determination.

(5) The ashing time should be able to ensure that the sample is completely ashed at a temperature of 815±15, but it is also disadvantageous to extend the ashing time at will.