| 摘要 |
<p>A thermite compsn. comprises a particulate oxidisable metal, particulate Fe oxide and a particulate refractory charge consisting entirely or partly of ZrO2. The thermite compsn. is used for repairing worn bottom plates of ingot moulds by inserting in the cavities, igniting and leaving to burn, melt, and solidify. The repaired section lasts longer than those repaired using conventional thermite compsns.</p> |
