以阿尔及利亚白云石为原料合成高纯氧化镁

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Journal of Mining and Metallurgy Section B-Metallurgy Pub Date : 2023-01-01 DOI:10.2298/jmmb220406005b

C. Bouchekrit, M. Kolli, M. Altiner, R. Doufnoune

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引用次数: 0

摘要

以阿尔及利亚白云石为原料，采用浸出—沉淀—煅烧工艺成功合成了高纯度的纳米Mg(OH)2和MgO颗粒。采用田口法考察了H2SO4酸浓度(C)、温度(T)、时间(T)、料液比(S/L)等浸出参数和沉淀碱类型(KOH、NaOH、NH4OH)、OH-/Mg2+比、温度等沉淀参数对所得产物性能的影响。优选出最佳浸出条件为:C=5M, T=65?C, t=15 min，液液比为1:5。OH-/Mg2+ = 10.5时，选择氢氧化钾(KOH)作为沉淀碱。沉淀物在800℃下的煅烧?在2 h的C过程中，可以生产出高纯度的MgO(~ 99.45%)，晶粒尺寸约为16.5 nm，颗粒以团聚多孔板的形式存在，具有高SSA (70.42 m2/g)，这可能对某些应用如催化剂或载体感兴趣。

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Synthesis of high purity magnesia MgO from Algerian dolomite ore

A nanometric Mg(OH)2 and MgO particles with high purity were successfully synthesized from Algerian dolomite via a leaching-precipitation-calcination process. The effect of leaching parameters such as H2SO4 acid concentration (C), temperature (T), time (t), solid/liquid ratio (S/L), and precipitation parameters: type of precipitating base (KOH, NaOH, NH4OH), OH-/Mg2+ ratio, and temperature on the obtained product properties were investigated using Taguchi approach. The optimal leaching conditions were selected as: C=5M, T=65?C, t=15 min, and S/L ratio=1:5. Whereas, the potassium hydroxide (KOH) was selected as the optimal precipitating base with OH-/Mg2+ = 10.5. The calcination of the precipitates at 800?C during 2 h made it possible to produce a high purity MgO (~99.45 %) with a crystallite size of approximately 16.5 nm and particles in the form of agglomerated porous plates with a high SSA (70.42 m2/g) which may be of interest for some applications such as catalysts or supports.

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来源期刊

Journal of Mining and Metallurgy Section B-Metallurgy 工程技术-冶金工程

CiteScore

2.00

自引率

40.00%

发文量

审稿时长

2 months

期刊介绍： University of Belgrade, Technical Faculty in Bor, has been publishing the journal called Journal of Mining and Metallurgy since 1965 and in 1997 it was divided in two independent journals dealing with mining and metallurgy separately. Since 2009 Journal of Mining and Metallurgy, Section B: Metallurgy has been accepted in Science Citation Index Expanded. Journal of Mining and Metallurgy, Section B: Metallurgy presents an international medium for the publication of contributions on original research which reflect the new progresses in theory and practice of metallurgy. The Journal covers the latest research in all aspects of metallurgy including hydrometallurgy, pyrometallurgy, electrometallurgy, transport phenomena, process control, solidification, mechanical working, solid state reactions, materials processing, surface treatment and relationships among processing, structure, and properties of materials.