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首页> 外文会议>Powder Metallurgy World Congress amp; Exhibition(PM 2006); 20060924-28; Busan(KR) >Acid-Insoluble Substances in Reduced Iron Powder from Ores
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Acid-Insoluble Substances in Reduced Iron Powder from Ores

机译：矿石中还原铁粉中的酸不溶物

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摘要

X-ray analysis on iron ores and reduced iron powders revealed that around 60% acid-insoluble substances were hexagonal and tetragonal quartz, another 40% substances were sillimanite, alumina-silicate, an unnamed zeolite, all contained Si and Al. SEM images displayed that the particle size of them was in the range of 3～7 μm, which may be the initial source of the cracking in the sintered body. Statistics analysis showed that the Acid-Insoluble Content (AIC) for high-grade magnetite powder was (0.130±0.010) % during the latest five months. The predicting value for reduced iron powder from ore powders should be 0.179 %. However, the testing value for reduced iron powder was (0.192±0.014) %. The limited difference of 0.013% might imply rare pollution coming from the reduction and milling processes. The most important step for control AIC should be the separation process of iron ore powders.
机译：对铁矿石和还原铁粉的X射线分析表明，约60％的酸不溶性物质为六方和四方石英，另外40％的物质为硅线石，硅酸铝，一种未命名的沸石，均包含Si和Al。扫描电镜（SEM）图像显示其粒径在3〜7μm范围内，这可能是烧结体产生裂纹的最初原因。统计分析表明，最近五个月高品位磁铁矿粉的酸不溶物含量（AIC）为（0.130±0.010）％。矿石粉中还原铁粉的预测值应为0.179％。但是，还原铁粉的试验值为（0.192±0.014）％。 0.013％的有限差异可能意味着还原和研磨过程会产生稀有污染。控制AIC的最重要步骤应该是铁矿粉的分离过程。

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