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利用攀钢含钛高炉渣低温氯化炉冷态模型,采用电导率法对脉冲示踪粒子进行试验研究,分别考察了内部挡板、物料流量、表观气速等操作参数对低温氯化炉中颗粒停留时间分布(RTD)的影响。结果表明,挡板纵向切割流化床相对空间,消除短路,有利于颗粒与流化气的充分混合,双挡板条件下,碳化渣颗粒在流化床内RTD更为集中(方差σ2t由0.67明显降低至0.5);加料速率由1.9 g/s减小至1.1 g/s,物料平均停留时间延长一倍,碳化渣反应时间增加。表观气速增大至0.15 m/s时,虽然在一定程度上弱化了碳化渣停留时间分布的集中性,但返混强化了颗粒与气体的接触和反应,保证了流化状态,有利于提高碳化渣氯化效率。
The cold state model of low temperature chlorination furnace for titanium-containing blast furnace slag in Panzhihua Iron and Steel (Group) Co., Ltd. was adopted. The pulse tracer particles were tested by conductivity method. The effects of internal baffles, material flow rate and superficial gas velocity In the particle residence time distribution (RTD) impact. The results show that the baffle longitudinally cuts the relative space of the fluidized bed and eliminates the short circuit, which is beneficial to the thorough mixing of the particles and the fluidized gas. Under double baffle conditions, the RTD of carbonized slag particles is more concentrated in the fluidized bed (variance σ2t: 0.67 Obviously reduced to 0.5). The feed rate decreased from 1.9 g / s to 1.1 g / s. The average residence time of the material doubled and the reaction time of carbonized slag increased. When the apparent air velocity is increased to 0.15 m / s, although the concentration of dwell time distribution of carbonized slag is weakened to some extent, the back-mixing strengthens the contact and reaction between the particles and the gas to ensure the fluidized state, which is in favor of Improve the efficiency of carbonized slag chlorination.