A two-stage oxidation—alkali leaching—acid leaching method was proposed to recovery Fe,V,and Ti in modified Ti-bearing blast furnace slag.The optimal experiment conditions of iron extraction were one-stage oxidation...A two-stage oxidation—alkali leaching—acid leaching method was proposed to recovery Fe,V,and Ti in modified Ti-bearing blast furnace slag.The optimal experiment conditions of iron extraction were one-stage oxidation time 40 s and holding time 8 min.The recovery rate of iron was 89.93%.The optimum experiment conditions of vanadium extraction were total oxidation time of 126 s,NaOH concentration of 4.0 mol/L,leaching temperature of 95℃,leaching time of 90 min,and the number of cycle was 4.The leaching rate of vanadium was 92.13%.The optimal experiment conditions of titanium extraction were HCl concentration of 4.5 mol/L,leaching temperature of 75℃,and leaching time of 90 min.The TiO_(2)content of synthetic rutile was 98.61%.展开更多
对 L F合成渣脱硫、脱氧技术理论和埋弧精炼基本方法进行了分析。介绍了宝钢 30 0 t L F脱硫合成渣、脱氧合成渣和埋弧精炼技术的开发过程及应用效果。采用所开发的上述技术 ,能够批量生产 [S]≤ 10× 10 - 6的超低硫钢和 T [O]≤ 1...对 L F合成渣脱硫、脱氧技术理论和埋弧精炼基本方法进行了分析。介绍了宝钢 30 0 t L F脱硫合成渣、脱氧合成渣和埋弧精炼技术的开发过程及应用效果。采用所开发的上述技术 ,能够批量生产 [S]≤ 10× 10 - 6的超低硫钢和 T [O]≤ 15× 10 - 6的低氧钢 ,并实现了 L F全程埋弧精炼。展开更多
介绍了感应电炉熔炼铸铁的优势,对合成铸铁生产、铁液化学成分的控制、感应电炉的节能等3个热点问题进行了分析,指出:(1)合成铸铁生产须重视废钢的选择、增碳剂的选择与使用、溶N的运用与限制、增O与增S、终点温度的控制;(2)有关铁液化...介绍了感应电炉熔炼铸铁的优势,对合成铸铁生产、铁液化学成分的控制、感应电炉的节能等3个热点问题进行了分析,指出:(1)合成铸铁生产须重视废钢的选择、增碳剂的选择与使用、溶N的运用与限制、增O与增S、终点温度的控制;(2)有关铁液化学成分的控制,建议配置多功能热分析仪和直读光谱仪,使用净料,准确配料,合理投料,适时造渣,熔炼后期谨防气体含量回升、烧损增加,及时倾炉出铁,快速熔炼,重视人的因素;(3)感应电炉熔炼的节能要注意感应电炉装备的选择、熔炼操作以及计划调度,恰当处理上述问题后,感应电炉能耗可降至580~540 k Wh/t;连续熔炼,冷料至1 500℃铁液的熔炼时间可为35~54 min/炉。展开更多
基金financial support from the National Science and Technology Support Program of China(No.2015BAB18B00)。
文摘A two-stage oxidation—alkali leaching—acid leaching method was proposed to recovery Fe,V,and Ti in modified Ti-bearing blast furnace slag.The optimal experiment conditions of iron extraction were one-stage oxidation time 40 s and holding time 8 min.The recovery rate of iron was 89.93%.The optimum experiment conditions of vanadium extraction were total oxidation time of 126 s,NaOH concentration of 4.0 mol/L,leaching temperature of 95℃,leaching time of 90 min,and the number of cycle was 4.The leaching rate of vanadium was 92.13%.The optimal experiment conditions of titanium extraction were HCl concentration of 4.5 mol/L,leaching temperature of 75℃,and leaching time of 90 min.The TiO_(2)content of synthetic rutile was 98.61%.
文摘对 L F合成渣脱硫、脱氧技术理论和埋弧精炼基本方法进行了分析。介绍了宝钢 30 0 t L F脱硫合成渣、脱氧合成渣和埋弧精炼技术的开发过程及应用效果。采用所开发的上述技术 ,能够批量生产 [S]≤ 10× 10 - 6的超低硫钢和 T [O]≤ 15× 10 - 6的低氧钢 ,并实现了 L F全程埋弧精炼。
文摘介绍了感应电炉熔炼铸铁的优势,对合成铸铁生产、铁液化学成分的控制、感应电炉的节能等3个热点问题进行了分析,指出:(1)合成铸铁生产须重视废钢的选择、增碳剂的选择与使用、溶N的运用与限制、增O与增S、终点温度的控制;(2)有关铁液化学成分的控制,建议配置多功能热分析仪和直读光谱仪,使用净料,准确配料,合理投料,适时造渣,熔炼后期谨防气体含量回升、烧损增加,及时倾炉出铁,快速熔炼,重视人的因素;(3)感应电炉熔炼的节能要注意感应电炉装备的选择、熔炼操作以及计划调度,恰当处理上述问题后,感应电炉能耗可降至580~540 k Wh/t;连续熔炼,冷料至1 500℃铁液的熔炼时间可为35~54 min/炉。
