噴霧焙燒氧化鐵粉之生產及粒徑特性研究

A Study on the Manufacture and Particle Characteristics of Spray-Roasted Iron Oxides

余承聖(Cheng-Sheng Yu) ； 黃欽麟(Chin-Lin Huang) ； 何燦穎(Tsan-Ying Ho)

《鑛冶：中國鑛冶工程學會會刊》 45卷4期 (2001/12) Pp. 139-148

https://doi.org/10.30069/MM.200112_45(4).0015

摘要

熱軋鋼捲酸洗液經純化處理及控制噴霧焙燒爐之焙燒條件後可產出SiO_2、Ca、P、Cr等雜質少，粒徑物性穩定之氧化鐵粉作為軟磁之原料。中鋼SB、DC、G級氧化鐵粉分別應用於MnZn、NiZn、MgZn軟磁。噴霧焙燒氧化鐵粉具有球殼顆粒（二次粒子）愈粗，內含一次粒子愈細小之形觀。因SSA及APS主要由一次粒子大小所決定，致使氧化鐵粉粒徑愈粗，SSA反而愈大、APS愈小，APS與SSA呈反比對應。但粒徑分佈影響APS分析值，致使磨細之氧化鐵粉APS與SSA呈正比對應。噴霧培燒氧化鐵粉之APS與NiZn軟磁之導磁率及收縮率則成反比對應關係。

關鍵字

噴霧焙燒氧化鐵粉 ； 平均粒徑 ； 鎳鋅鐵氧磁

並列摘要

The iron oxides with low SiO_2, Ca, P, Cr impurities and stable particle sizes were produced from the pre-purified pickling solutions and through finely tuned roasting conditions. The SB, DC,G brands iron oxides of China Steel Corp. have been found applications in manufacturing MnZn, NiZn, and MgZn ferrites. The spray-roasted iron oxides possess the morphology of coarser agglomerates (termed as secondary particles) containing finer primary particles. Since the specific surface area (SSA) and average particle size (APS, Fisher size) of spray-roasted iron ox ides are predominantly contributed from the primary particles, thus coarser spray-roasted iron oxides exhbibit larger SSA but smaller APS. APS is inversely correlated to SSA for spray-roasted iron oxides. However, the size distribution influences the measurement of APS of spray-roasted iron oxides. This effect gives the result that APS is positively correlated to SSA, while the permeability and shrinkage of NiZn ferrite are inversely correlated to the APS of spray-roasted iron oxides.

並列關鍵字

Spray-roasted iron oxide ； APS (Fisher size) ； NiZn Ferrite