MgO-ZrO2 refractory ceramics based on recycled magnesia-carbon bricks
MgO-ZrO2 refractory ceramics based on recycled magnesia-carbon bricks
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DOI：
10.1016/j.conbuildmat.2019.117084
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发表时间：
2020-01
影响因子：
7.4
通讯作者：
R. Kusiorowski
中科院分区：
文献类型：
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作者：
R. Kusiorowski
镁碳（MgO-C）耐火材料用于钢铁行业，在其生命周期结束后，它们将被新的耐火材料所取代。因此，产生大量废MgO-C并储存在垃圾填埋场中。这种废物可以作为二次氧化镁的潜在来源再利用。本研究利用煅烧后的镁碳废料制备镁锆质耐火材料。它作为原料混合物的单独成分或以熔融氧化镁-氧化锆共熟料的形式应用，由此生产新的耐火材料。在1660 °C下烧制后，测量并确定了诸如线性收缩率、开孔孔隙率、表观密度、冷压强度、抗热震性、孔径分布、微观结构以及耐腐蚀性等性能。研究结果表明，用过的镁碳质耐火材料的回收利用是可能的，因为我们已经获得了一种具有令人满意的性能的材料，这可以通过添加氧化锆来进一步改善。
Magnesia-carbon (MgO-C) refractories are used in the steel industry, where, after their life cycle, they are replaced by new ones. Consequently, a large amount of spent MgO-C is produced and stored in landfills. This waste may be re-used as a potential source of secondary magnesia. In this study, calcined MgO-C waste was used to prepare magnesia-zirconia refractories. It was applied as an individual component of raw materials mix or in the form of fused magnesia-zirconia co-clinker, from which new refractories were produced. After firing at 1660 °C, properties like linear shrinkage, open porosity, apparent density, cold crushing strength, thermal shock resistance, pore size distribution, microstructure as well as resistance to corrosion were measured and determined. The research results indicate that recycling of spent MgO-C refractories is possible as we have obtained a material with satisfactory properties, which can be additionally improved by zirconia addition.