东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (5): 698-701.DOI: -

• 论著 • 上一篇    下一篇

添加剂对改性含钛高炉渣氯化过程的影响

付念新;娄太平;都兴红;隋智通;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家重点基础研究发展计划项目(2007CB613503)

Effect of additives on chlorination of modified titania-containing blast furnace slag

Fu, Nian-Xin (1); Lou, Tai-Ping (1); Du, Xing-Hong (1); Sui, Zhi-Tong (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Fu, N.-X.
  • About author:-
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摘要： 针对高钙镁改性含钛高炉渣氯化过程物料易粘结问题,通过热力学分析及X射线衍射检测研究了添加剂防止粘结的作用机制,并考察了温度、配碳量、气体(N2+Cl2)流量和氯气分压对氯化行为的影响.结果表明:氯化过程中添加剂磷酸优先与CaO作用生成高熔点的Ca3(PO4)2以及后者与CaCl2反应生成Ca5(PO4)3Cl,避免了低熔点钙镁氯化物富集而造成的物料粘结.当反应条件为温度850~900℃、配碳过量15%、气体流量400 mL/min和氯气分压40 kPa,得到最佳的氯化结果,60 min内氯化率可达到90.8%~93.5%.

关键词: 含钛高炉渣, 氯化率, 物料粘结, 添加剂, 磷酸钙, 氯磷灰石

Abstract: To solve the easy sticking of the particles in the chlorination of modified titania-containing blast furnace slag, the mechanism of preventing the sticking by additives was studied by XRD and thermodynamics analysis. Meanwhile, the effects of temperature, excessive carbon content, gas flow rate (N2+Cl2) and chlorine partial pressure on the chlorination behavior were investigated. The results showed that the prior reaction of phosphoric acid as an additive with CaO occurs to form Ca3(PO4)2 with a high-melting point, and the latter reacts with CaCl2 to give Ca5(PO4)3Cl. Thereby the sticking of the particles caused by the aggregation of low-melting point calcium and magnesium chlorides is avoided. The best chlorination results are obtained at 850~900°C with the excessive carbon content of 15%, the flow rate of 400 mL/min and the chlorine partial pressure of 40 kPa, and the chlorination ratio reaches 90.8%~93.5% in 60 min.

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