问答题

[填空(1)]
利用含杂质的高铝矾土生产电熔刚玉时，通常采用含( ) 物质作( )剂而在高温下除去这些杂质:

【参考答案】

利用含杂质的高铝矾土生产电熔刚玉时，通常采用含(碳) 物质作(还原剂)剂而在高温下除去这些杂质:

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