• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Synthesis of Calcium Ferrite from Waste Gypsum Board
【24h】

Synthesis of Calcium Ferrite from Waste Gypsum Board

机译：废石膏板合成铁酸钙

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Herein, we investigate the chemical recycling of waste gypsum board obtaining synthetic calcium ferrite for making steel. Thermodynamic estimation and results of small-scale heating tests revealed that decomposition of gypsum was promoted in the partial pressure of O_2 and lower partial pressure of SO_2 by preventing the formation of CaS. The addition of Fe_2O_3 to gypsum helped reduce the decomposition temperature of gypsum, resulting in formation of calcium ferrite in a lower temperature. Decomposition of gypsum was incomplete after heating in air at 1 180℃, whereas calcium ferrite was successfully obtained by a two-step heat treatment of gypsum: forming CaS through carbon reduction and heating the fine mixture of Fe_2O_3 and CaS at 1 180℃. Calcium ferrite can also be obtained in a single heat treatment if we use the proper gas and material conditions. After trial tests using a large-scale rotary kiln, we confirmed that heating a sample containing gypsum, coke fine, and Fe_2O_3 at a temperature less than 1 200℃ resulted in the formation of calcium ferrite accompanied with a high desulfurization degree of gypsum.
机译：在本文中，我们研究了废石膏板的化学回收利用，从而获得了用于制造钢的合成铁酸钙。热力学估计和小规模加热试验的结果表明，通过阻止CaS的形成，石膏的分解在O_2的分压和SO_2的较低分压中得到了促进。在石膏中添加Fe_2O_3有助于降低石膏的分解温度，从而在较低的温度下形成铁酸钙。在空气中于1 180℃加热后，石膏的分解不完全，而石膏的两步热处理成功地获得了铁素体钙：通过碳还原形成CaS并在1 180℃加热Fe_2O_3和CaS的精细混合物。如果我们使用适当的气体和材料条件，也可以通过一次热处理获得铁酸钙。经过使用大型回转窑的试验测试，我们证实了将包含石膏，焦炭细粉和Fe_2O_3的样品在低于1200℃的温度下加热会导致形成铁酸钙，并伴随着高的脱硫度。

著录项

  • 来源
    《ISIJ international》 |2016年第1期|168-175|共8页
  • 作者

    Kenichi HIGUCHI; Akira GUSHIMA; Tsuneo IKEDA;

  • 作者单位

    Process Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, 20-1 Shintomi, Futtsu-shi, Chiba, 293-8511 Japan;

    Formerly Nippon Steel & Sumitomo Metal Corporation. Now at Hamada Heavy Industries LTD, 1-1 Tobihatacho, Tobata-ku, Kitakyusyu-shi, Fukuoka, 804-0001 Japan;

    Formerly Nippon Steel & Sumitomo Metal Corporation. Now at TETSUGEN Corporation, 2-2 Tobihatacho, Tobata-ku, Kitakyusyu-shi, Fukuoka, 804-0001 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

    calcium sulfate; calcium oxide; calcium sulfide: rotary kiln; decomposition; desulfurization; chemical recycle;

    机译：硫酸钙;氧化钙硫化钙：回转窑;分解;脱硫化学循环;

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