利用DTATG、恒温TG和XRD测试方法研究了硼铁矿氧化焙烧过程中的相变和失重率。实验表明，硼铁矿在氧化焙烧的过程中，低温时(＜700 ℃)矿石中的磁铁矿发生氧化反应生成赤铁矿，蛇纹石分解生成镁橄榄石。硼镁石在700 ℃左右分解脱掉结构水形成遂安石，硼镁石的分解是造成硼铁矿大量失重的主要原因。通过XRD分析可知矿石中的镁铁矿相、硼铁矿相为最稳定相，在硼铁矿原矿焙烧过程中不发生相变。为硼铁矿烧结冶炼工艺提供了必要的理论依据。
The phase transformation and weight loss rate of ludwigite in oxidizing roasting were studied by DTATG, isothermal TG and XRD. The results show that magnetite is transformed into hematite, serpentine is decomposed into forsterite at lower temperature (T＜700 ℃). The dehydration and transformation into suanite of decomposed of szaibelyite at about 700 ℃ is the main reason of ludwigite weight loss. It was found by XRD that paigeite and magnoferrite are the most stable component without phase tromsformation during oxidizing roasting.
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