用于窑法还原磷矿的新型反应层球团的研究

发布时间：2018-06-12 14:03

  本文选题：焦炭 + 一氧化碳　； 参考：《非金属矿》2017年03期

【摘要】：研究了一种用于窑法磷酸工艺的新型反应层球团。通过热分析分别确定了焦炭(C)及一氧化碳(CO)还原磷矿时所需的温度,以及钙硅比(CaO与SiO_2摩尔比)对焦炭(C)还原磷矿的影响。研究了球团反应层中造孔材料掺量及炉内空气流速对磷矿还原率的影响,并对反应后残球的容重及抗压强度进行了测定。结果表明:高温下焦炭(C)和CO均能还原磷矿;随着球团反应层中造孔材料掺量及炉内空气流速的增大,磷矿还原率均呈现先增大后减小的趋势。炉内空气流速为500 m L/min时,球团造孔材料掺量与钙硅比分别为8%和1.0的球团在1300℃下煅烧反应3.5 h后,其磷矿还原率可达84.14%。
[Abstract]:A new reactive pellet used in kiln phosphoric acid process was studied. By thermal analysis, the temperature required for the reduction of phosphate rock by coke (C) and carbon monoxide (CO), as well as the effect of the ratio of calcium to silicon (Cao / Sio _ 2) on the reduction of phosphate rock by coke (C) and CO (CO) were determined respectively. The effect of pore-making material content in pellet reaction layer and air flow rate in furnace on the reduction rate of phosphate rock was studied. The bulk weight and compressive strength of the residual ball after reaction were measured. The results show that both coke (C) and CO can reduce phosphate rock at high temperature, and the reduction rate of phosphate rock increases first and then decreases with the increase of pore-forming material content in pellet reaction layer and the increase of air flow rate in furnace. When the flow rate of air in the furnace is 500ml / min, the reduction rate of phosphate rock can reach 84.14 when the ratio of pore-making material and calcium to silicon is 8% and 1.0, respectively, after calcined at 1300 鈩，

本文编号：2009925