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首页> 外文期刊>ISIJ international >Agglomeration of Return Fines of Sinter for Blast Furnace Raw Materials
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Agglomeration of Return Fines of Sinter for Blast Furnace Raw Materials

机译：高炉原料烧结烧结料的凝聚

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摘要

Return fines of sinter were agglomerated with a binder material such as cement and fine powder of blast furnace slag in order to use the agglomerates as raw materials in the blast furnace. Reduction tests of the agglomerates were carried out to investigate the high temperature properties of the agglomerates. The following findings were obtained. The agglomerates have lower RDI (RDI ＜20%) than sinter because sinter, which consists of brittle glassy silicate, was arranged discretely in the agglomerates and bonded by the soft materials of the binder, and as a result, size degradation during reduction was prevented. The agglomerates have higher RI (DI＞70%) than sinter due to the high abundance ratio of fine pores in the agglomerates. Moreover, in comparison with sinter, the agglomerates also have equal or greater strength after reduction at 700°C and 900°C because solid phase sintering was promoted by adding ultrafine iron oxide powder. Therefore, as a blast furnace raw material, the permeability and reducibility of the agglomerates of return fines of sinter are superior to those of conventional sinter. This concept is considered to be effective for utilizing sinter fines as blast furnace raw materials in a high pulverized coal rate and low coke rate operation.
机译：用粘合剂材料烧成烧结料，粘合剂材料如水泥和高炉炉渣的细粉，以便在高炉中使用附聚物作为原料。进行了凝聚物的还原试验，以研究附聚物的高温性质。获得了以下发现。聚集体具有低于烧结的RDI（RDI <20％），因为由脆性玻璃硅酸盐组成的烧结，在附聚物中离散地布置并通过粘合剂的软材料键合，结果，防止了减少期间的尺寸降解。由于聚集体中的细孔的高丰度比，聚集酯具有比烧结更高的R 1（DI> 70％）。另外，与烧结相比，在700℃和900℃下还原后，附聚物还具有相等或更大的强度，因为通过加入超细氧化铁粉末促进固相烧结。因此，作为高炉原料，烧结料回料附聚物的渗透率和再减少优于常规烧结的渗透性。该概念被认为是利用烧结料作为高炉原料以高粉煤速率和低焦速率操作的有效性。

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  • 来源
    《ISIJ international》 |2020年第7期|1389-1394|共6页
  • 作者

    Yasushi OGASAWARA; Takeshi SATO; Jun ISHII; Ryota MURAI; Shiro WATAKABE;

  • 作者单位

    Steel Research Laboratory JFE Steel Corporation 1 Kawasaki-cho Chuo-ku Chiba 260-0835 Japan;

    Ironmaking Technology Dept. JFE Steel Corporation 2-2-3 Uchisaiwaicho Chiyoda-ku Tokyo 100-0011 Japan;

    Steel Research Laboratory JFE Steel Corporation 1 Kawasaki-cho Chuo-ku Chiba 260-0835 Japan;

    Steel Research Laboratory JFE Steel Corporation 1 Kawasaki-cho Chuo-ku Chiba 260-0835 Japan;

    Technology Planning Dept. JFE Steel Corporation 2-2-3 Uchisaiwaicho Chiyoda-ku Tokyo 100-0011 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    agglomeration; return fines; RDI; RI; strength after reduction;

    机译：聚集;退回罚款;RDI;ri;减少后的力量;

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