Process of Re-Resourcing of Converter Slag
Process of Re-Resourcing of Converter Slag
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DOI：
10.1016/s1006-706x(12)60006-5
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发表时间：
2011-12
影响因子：
2.5
通讯作者：
Jintao Gao;Shi-qi Li;Yan-ting Zhang;Yan-ling Zhang;Peiyu Chen;Ping Shen
中科院分区：
文献类型：
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作者：
Jintao Gao;Shi-qi Li;Yan-ting Zhang;Yan-ling Zhang;Peiyu Chen;Ping Shen
在分析现有钢渣处理工艺的基础上，提出了“转炉渣资源化”工艺。对济钢转炉钢渣进行了研究。研磨后，矿渣含有3. 3%的铁颗粒，54。磁性部分（w TFe= 20%）的84%，和41.非磁性部分占84%，可直接用于制造水泥。在1000 ℃以下，用H2和CO可以将渣中的非磁性Fe 2 O3高效还原为磁性铁，精确还原后的渣分散度高，不烧结，为铁与杂质的分离提供了最佳条件。为了分离还原后的渣并富集铁，设计并制作了实验室规模的磁选装置。提出了将矿渣资源化的工艺流程，即磁选、精密还原、磁选、去除游离氧化钙（f-CaO），以获得富铁磁性材料和水泥掺合料。通过该工艺，每吨矿渣可获得33 kg铁粒、150 kg富铁料和700 kg水泥。此外，该工艺回收转炉渣具有能耗低、物耗低、无污染物排放等优点。
The process of “re-resourcing of converter slag” was put forward based on the analysis of the existing steel slag treatment process. The converter slag obtained from Jinan steel plant was studied. After grinding, the slag contained 3. 3% of iron particles, 54. 84% of magnetic part (w TFe= 20%), and 41. 84% of non-magnetic part, which could be used for making cement directly. At a temperature below 1000 C, the non-magnetic Fe 2 O 3 in the slag could be efficiently reduced to magnetic iron by pure H 2 and CO. The slag after precise reduction had high degree of dispersion and did not get sintered, which provided an optimum condition for the separation of iron and impurities. To separate the slag and enrich the iron after reduction, the laboratory-scale device of magnetic separation was designed and made. The process of slag re-resourcing, which included magnetic sorting, precise reduction, magnetic separation, and removal of free calcium oxide (f-CaO), was proposed to obtain iron-rich magnetic materials and cement adulterant materials. Through this process, 33 kg iron particles, 150 kg iron-rich material and 700 kg cement could be obtained in each ton slag. Besides, this process to recycle converter slag had a lower energy and material consumption and no pollutant emission.