闪速吹炼炉内颗粒在不同操作参数下的分布与演化规律  

Distribution and evolution of particles in flash converting furnace under different operational conditions

作　　者：祝振宇 周萍[1] 陈卓[1] 周俊 万兴邦 张劲松 任鹏 Zhen-yu ZHU;Ping ZHOU;Zhuo CHEN;Jun ZHOU;Xing-bang WAN;Jing-song ZHANG;Peng REN(School of Energy Science and Engineering,Central South University,Changsha 410083,China;Tongling Non-ferrous Metals Group Co.,Ltd.,Tongling 244000,China)

机构地区：[1]中南大学能源科学与工程学院,长沙410083 [2]铜陵有色金属集团控股有限公司,铜陵244000

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第9期2866-2878,共13页中国有色金属学报（英文版）

基　　金：The authors are grateful for the financial support from the National Natural Science Foundation of China(No.2106217).

摘　　要：通过开展工业试验揭示闪速吹炼炉内颗粒质量和粒径的分布与演化规律,同时研究不同配风参数对颗粒分布的影响。结果表明,颗粒在反应塔内的下落过程中,其平均粒径增长通常为2~3倍,且聚并后的大颗粒主要分布在料锥中部和外部;而导致该现象出现的原因是较高的湍流强度和颗粒分布密度、以及天然气燃烧的位置使该位置处颗粒升温熔融、并发生碰撞和聚并。另外,提高分散风与工艺风动量比能使物料颗粒在反应塔内的分布更加均匀,更有利于冰铜的氧化反应。相较于调整工艺风参数,改变分散风能更有效地提高颗粒的空间分布范围。A series of industrial experiments were conducted,not only to reveal the distribution and evolution of particle mass and size inside the flash converting furnace,but also to investigate the influence of airflows on the particle distribution.The results showed that the average size of particles grows 2−3 times when falling through the reaction shaft,and large aggregated particles were mainly distributed in the center and outer part of the material cone.This phenomenon was attributed to the collision and aggregation of molten particles caused by the high turbulent intensity of airflow,high particle mass concentration,and positions of natural gas combusting.Moreover,increasing the momentum ratio of the distribution air to the process air helped the particles to be distributed more uniformly,which could be beneficial to matte oxidation.Compared with changing process air,adjusting the distribution air could improve the particle spatial distribution more efficiently.

关 键 词：工业试验 颗粒演化 质量分布 粒径分布 动量比 闪速吹炼炉 

分 类 号：TF811[冶金工程—有色金属冶金]