摘要
In order to reasonably utilize the abundant resources of high-phosphorus iron ore and ilmenite in China,the technology of top-blown smelting reduction with oxygen enrichment was used to smelt the mixed ore of high-phosphorus iron and ilmenite.The effect,which is related to basicity,reduction temperature,carbon-oxygen ratio and time of ventilated oxygen to iron recovery,dephosphorization rate,content of iron,phosphorus,sulfur and titanium in pig iron,was investigated in the experiment.The results show that an ideal outcome can be gained in condition of 6:4 ration on Mengqiao concentrate and Huimin iron ore,temperature of 1 500 °C,basicity of 1.3,1.0 on molar ration of carbon to oxygen,time of 10 min on blowing-oxygen.The outcome is that there is no foamy slag in generation,a good separation of slag and iron,iron recovery with 91.41%,content of phosphorus with 0.27% and tilanium content less than 0.001%.The atmosphere of strong oxidizing in the upper of reduction container and high potential of oxygen in the composition of slag in this technique bring phosphorus,titanium and silicon into slag,which ensures less content of impurity in pig iron.
In order to reasonably utilize the abundant resources of high-phosphorus iron ore and ilmenite in China, the technology of top-blown smelting reduction with oxygen enrichment was used to smelt the mixed ore of high-phosphorus iron and ilmenite. The effect, which is related to basicity, reduction temperature, carbon-oxygen ratio and time of ventilated oxygen to iron recovery, dephosphorization rate, content of iron, phosphorus, sulfur and titanium in pig iron, was investigated in the experiment. The results show that an ideal outcome can be gained in condition of 6:4 ration on Mengqiao concentrate and Huimin iron ore, temperature of 1 500℃, basicity of 1.3, 1.0 on molar ration of carbon to oxygen, time of 10 min on blowing-oxygen. The outcome is that there is no foamy slag in generation, a good separation of slag and iron, iron recovery with 91.41%, content of phosphorus with 0.27% and tilanium content less than 0.001%, The atmosphere of strong oxidizing in the upper of reduction container and high potential of oxygen in the composition of slag in this technique bring phosphorus, titanium and silicon into slag, which ensures less content of impurity in pig iron.
基金
Project(51064015) supported by the National Natural Science Foundation of China
Project(ZD2010001) supported by the Key Project of Yunnan Province Education of China
关键词
高磷铁矿石
还原技术
钛铁矿
富氧
顶吹
冶炼
混合物
熔炼
smelting reduction
ilmenite
high phosphorus iron ore
iron recovery
dephosphorization