碳对含钛高炉渣钠化反应热力学及钠化率的影响  

Effect of carbon on rate and thermodynamics of sodium reaction of titanium-bearing blast furnace slag

作　　者：居殿春 邱家用 徐敏人 张俊[3] 王海风[3] 齐渊洪[3] 

机构地区：[1]江苏科技大学张家港校区冶金与材料工程学院,江苏张家港215600 [2]张家港江苏科技大学产业技术研究院精细冶金研究所,江苏张家港215600 [3]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081

出　　处：《钢铁》2018年第1期88-93,共6页Iron and Steel

基　　金：国家重点实验室开放基金资助项目(SKLASPP201601);江苏科技大学博士启动基金资助项目(120140008)

摘　　要：为高效回收含钛高炉渣中钛元素,探索含钛高炉渣综合利用的新工艺。通过热力学计算分析了含钛高炉渣钠化可行性,热力学计算结果表明,在高于碳酸钠熔点1 124 K低于1 423 K的温度范围内进行含钛高炉渣的钠化反应是可行的。采用渣碱共熔法对含钛高炉渣进行钠化试验研究,结果表明,碳可以促进含钛高炉渣的钠化,随着配碳量的增加,含钛高炉渣的钠化率增加,在含钛高炉渣粒径d0为0.075 mm、反应温度为1 423 K、反应时间为2 h的条件下,当配碳量为nC∶nNa_2CO_3=2∶1时,含钛高炉渣的钠化率达到78%并维持稳定状态。In order to recycle titanium fromtitanium-bearing blast furnace slag with high efficiency,a new process for comprehensive utilization of titanium-bearing blast furnace slag is explored.Sodium modification feasibility of titanium-bearing blast furnace slag is analyzed through thermodynamic calculation.According to the result of thermodynamic calculation,the feasibility of sodium modification reaction of titanium-bearing blast furnace slag is indicated under temperature of 1 423 K when the melting point of sodium carbonate is higher than 1 124 K.The empirical study on sodium modification of titanium-bearing blast furnace slag is carried out through congruent melting of phosphorous slag.According to the results,carbon can facilitate the sodium modification of titanium-bearing blast furnace slag.Along with the increase of carbon content,the sodium rate of titanium-bearing blast furnace slag increases.When the titanium-bearing blast furnace slag particle size d0 is 0.075 mm and the carbon content reaches nC∶nNa_2CO_3=2∶1,under the conditions of 1 423 K holding 2 h,the sodium rate of titanium-bearing blast furnace slag will reach 78% and maintain a stable state.

关 键 词：含钛高炉渣 钠化 偏钛酸钠 综合利用 

分 类 号：X757[环境科学与工程—环境工程]