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Strontium ferrite powders prepared from oily cold rolling mill sludge by solid-state reaction method

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Abstract

Oily cold rolling mill (CRM) sludge is one of the pollutants emitted by iron and steel plants. Recycling oily CRM sludge can not only reduce pollution but also bring social and environmental benefits. In this study, using oily CRM sludge as sources of iron oxide, the strontium ferrite powders were synthesized in multiple steps including vacuum distillation, magnetic separation, oxidizing roasting, and solidstate reaction. The optimal technological conditions of vacuum distillation and oxidizing roasting were studied carefully. To consider the effects of Fe2O3/SrCO3 mol ratio, calcination temperature, milling time and calcination time on magnetic properties of prepared strontium ferrite powders, the orthogonal experimental method was adopted. The maximum saturation magnetization (62.6 mA·m2·g−1) of the synthesized strontium ferrite powders was achieved at the Fe2O3/SrCO3 mol ratio of 6, 5 h milling time, 1250 °C calcination temperature, and 1 h calcination time. Strontium ferrite powders synthesis method not only provides a cheap, high quality raw material for the production of strontium ferrite powders, but also effectively prevents the environmental pollution.

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Acknowledgments

This work was financially supported by the National Key Technology R&D Program (Nos. 2012BAC02B01, 2012BAC12B05, 2011BAE13B07, and 2011BAC10B02), the National High Technology Research and Development Program of China (No. 2012AA063202), the National Natural Science Foundation of China (Nos. 51174247 and 51004011), the Science and Technology Program of Guangdong Province, China (No. 2010A030200003), and the Ph.D. Programs Foundation of the Ministry of Education of China (No. 2010000612003).

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  1. Advanced Material and Technology Institute, University of Science and Technology Beijing, Beijing, 100083, China

    Bo Liu, Shen-Gen Zang, Jian-jun Tian, De-an Pan & Hang-Xin Zhu

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  1. Bo Liu
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  2. Shen-Gen Zang
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  3. Jian-jun Tian
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  5. Hang-Xin Zhu
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Correspondence to Shen-Gen Zang.

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Liu, B., Zang, SG., Tian, Jj. et al. Strontium ferrite powders prepared from oily cold rolling mill sludge by solid-state reaction method. Rare Met. 32, 518–523 (2013). https://doi.org/10.1007/s12598-013-0155-5

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  • DOI: https://doi.org/10.1007/s12598-013-0155-5

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