• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Development of Chromite Sinter from Ultra-Fine Chromite Ore by Direct Sintering
【24h】

Development of Chromite Sinter from Ultra-Fine Chromite Ore by Direct Sintering

机译：直接烧结从超细铬铁矿开发铬铁矿烧结矿

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A significant quantity of chromite ore is available in form of fines and is friable in nature. Agglomeration is necessary for utilizing these fines. Briquetting gives green agglomerates with inferior high temperature properties. Pelletization requires further grinding of the naturally available ore fines and the subsequent firing of the green pellets for strength development which make it energy-intensive and complex process. In contrast, sintering can be done directly on the as-received friable chromite ore in the presence of coke breeze (as in case of iron ore sintering), which is likely to be free from the above limitations. In the current work, an optimum combination of temperature, flux (added to increase the relative quantity of molten phase required for sintering) and coke (added as fuel to attain the sintering temperature in a sinter pot) was computed using the thermochemical software, FactSage 6.1 and enthalpy balance calculation. Sintering of a mixture of chromite ore fines and flux with the optimum composition at 1600°C was carried out in; (i) resistance furnace (100-g scale), without using carbon and (ii) a pot sintering set-up (10-kg scale), using the computed quantity of carbon. A good correlation between experimental result and predicted equilibrium phases has been observed. The characterization of the sinters prepared in pot sintering set-up was done by conducting shatter, tumbler, and abrasion tests, and their phase identifications by XRD and EPMA/EDS. The developed sinter was found to possess adequate handling strength that would be well acceptable to produce ferrochrome in the SAF.
机译：大量的铬铁矿以细粉形式存在，并且易碎。集聚是利用这些细粉所必需的。压块得到的绿色附聚物具有较低的高温性能。造粒需要进一步研磨天然可用的矿石粉，然后进行生坯的烧结，以提高强度，这使其耗费能量且复杂。相反，可以在存在焦风的情况下直接在原样的易碎亚铬酸盐矿石上进行烧结（如铁矿石烧结的情况），这很可能不受上述限制。在当前工作中，使用热化学软件FactSage计算了温度，通量（添加以增加烧结所需的熔融相的相对数量）和焦炭（添加为达到烧结炉中烧结温度的燃料）的最佳组合。 6.1和焓差计算。在1600℃下烧结具有最佳组成的铬铁矿粉和助熔剂的混合物。 （i）不使用碳的电阻炉（100克刻度），以及（ii）使用计算出的碳量的罐式烧结装置（10公斤刻度）。已经观察到实验结果与预测的平衡相之间的良好相关性。在罐式烧结装置中制备的烧结矿的表征是通过进行破碎，翻转和磨损试验，并通过XRD和EPMA / EDS对其进行鉴定的。发现开发的烧结体具有足够的处理强度，这对于在SAF中生产铬铁很容易接受。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号