铜闪速炉上升烟道结构对烟尘粘结影响的数值分析  

Numerical analysis of effect of copper flash smelting furnace flue structure on dust adhesion

作　　者：谢剑才 李兵 王放 范进军[1] 陈卓[2] 万兴邦 XIE Jiancai;LI Bing;WANG Fang;FAN Jinjun;CHEN Zhuo;WAN Xinbang(Jinlong Copper Co,Ltd.,Tongling 244021,China;School of Energy Science and Engineering,Central South University,Changsha 410083,China)

机构地区：[1]金隆铜业有限公司,安徽铜陵244021 [2]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《有色设备》2024年第6期50-57,共8页Nonferrous Metallurgical Equipment

基　　金：国家重点研发计划-循环经济关键技术与装备-铅锌矿搭配金属基固废铅锌同步冶炼成套装备与集成示范(2022YFC3901605)。

摘　　要：铜冶炼过程中上升烟道烟尘粘结常常对生产的稳定性及安全性造成显著影响,因此一直是铜冶炼企业共同关注的重要问题之一。本文以铜闪速熔炼过程为对象,基于数值仿真方法对当前闪速炉沉淀池出口与上升烟道连接部位典型结构下的烟气流动过程进行数值模拟与分析,通过比较不同结构下烟气流动过程特点发现:当采用“拱顶”加速型烟道连接结构时,上升烟道内的烟尘粘结主要发生在与沉淀池出口同侧壁面的回流区以及对侧的壁面高速区附近,这一结果与生产现场炉体检修时发现的上升烟道主要结瘤部位相一致;相比较而言,沉淀池出口与上升烟道采用“平顶”连接型结构时,烟道内局部高速区域有所减小,烟道入口处的烟气平均速度降低18.2%,烟气的流通效果更好;此外,对颗粒相分析发现,平顶结构设计下,进入烟道的烟尘颗粒含量降低了9.5%,表明用平顶结构在一定程度上有助于减轻上升烟道内的烟尘粘结与结瘤现象。The adhesion of dust in the upward flue during the copper smelting process significantly influenced the stability and safety of production,and the issue of dust adhesion had become one of the most common problems faced by copper-making enterprises.Focusing on a specific flash smelting furnace,a numerical simulation and analysis of the flue gas flow process at the connection between the current flash smelting furnace settler outlet and the flue were conducted.By comparing the characteristics of the flue gas flow process under different structures,the following results were discovered:when an arched acceleration-type flue connection structure was used in the simulation,dust adhesion in the flue primarily occurred in the recirculation zone on the same side as the settler outlet and near the highvelocity zone on the opposite wall.This result was consistent with the main locations of adhesion phenomena found during on-site furnace maintenance.In comparison,when a horizontal connection structure was used between the settler outlet and the riser shaft,the high-velocity areas in the flue were reduced.The maximum flue gas velocity decreased by 18.8%,resulting in better flue gas flow.Additionally,the analysis of the particle phase revealed that under the flat-top structure design,the amount of dust particles in the flue decreased by 9.5%,indicating that this structure can mitigate the adhesion of dust within the flue to a certain extent.

关 键 词：炼铜闪速炉 烟尘粘结 上升烟道 沉淀池 数值模拟 

分 类 号：TF811[冶金工程—有色金属冶金]