Accident Analysis
| Slow Heat Conduction | Top Problems | |
| 1、Not followed by the preheating instruction standardly. | 1、Slag accumulated around the top area or in between of the top area and the furnace cover. | |
| 2、Slag influences heat conduction. | 2、Repeatedly top-impact when feeding. | |
| 3、The crucible has reached its lifetime. | 3、Excessive oxidaion on top. | |
| 4、Connecting with some metals with large heat exchanging coefficients. | ||
| Corrosion | Explosion | |
| 1、Adding flux when the crucible is empty or with slug,Excessive use of flux. | 1、Heating rapidly while the crucible has damped during storage or transportation. | |
| 2、Certain fluxes contain corrosive substances. | 2、The added materials are not completely dried. | |
| 3、Fuel containing corrosive substances. | 3、Overrapid heating-up during preheating procedure. | |
| 4、Abnormal high-temperature operation may result in molten glaze layer resembles corrosion. | ||
| Excessive Oxidation | Middle or Bottom Parts Problems | |
| 1、Hoisting or moving irregularly damages glaze layer. | 1、The crucible is not installed properly. It should be put in the middle of the furnace stack, smooth and stable. | |
| 2、Flame dashes against bottom directly. | 2、A suited graphite stand is unutilized. | |
| 3、No corresponding electric heating circles around the top or bottom of the crucible. | 3、Metal materials added overfilled,or metal ingots horizontally,diagonal in the crucible. | |
| 4、The top of the crucible is not protected by upturned flame and isolated from oxygen in gas furnace. | 4、Leftover slag or molten metal in the crucible. | |
| 5、Overheated working temperature. | 5、The existence of temperature difference in furnace stack. | |
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