富氧焙烧技术在109 m^(2)锌精矿流态化焙烧炉上的应用实践  

Application of oxygen enriched air roasting technology in 109 m^(2) fluidized-bed roaster for zinc concentrate

作　　者：皮忠斌 张振国 王卡卡 柴伟 许良[2] PI Zhong-bin;ZHANG Zhen-guo;WANG Ka-ka;CHAI Wei;XU Liang

机构地区：[1]云南驰宏锌锗股份有限公司会泽冶炼分公司,云南会泽654211 [2]中国恩菲工程技术有限公司,北京100038

出　　处：《中国有色冶金》2021年第5期44-48,53,共6页China Nonferrous Metallurgy

摘　　要：多年来,国内富氧焙烧技术在锌精矿焙烧炉上的应用始终停留在试验阶段,驰宏会冶首次实现了锌精矿富氧焙烧规模化生产。该公司通过在原鼓风系统管道上增加富氧分布装置,配套有高浓度氧气调节阀组及流量、压力监测仪表等设施,同时,配套改进流态化冷却器、高温引风机和鼓风机等设备,实现了富氧焙烧技术在锌精矿焙烧炉上的应用。生产实践表明,在适当的工艺参数下,富氧焙烧技术可以充分释放产能,流态化焙烧炉床能率提升到8.03 t/m^(2)·d;焙烧矿质量得到有效改善,烟尘含硫下降至3.5%;生产吨锌能耗大幅降低,空压风单耗194.0 Nm^(3)/t,电单耗135.80 kW·h/t,高浓度氧气的单耗为81 Nm^(3)/t。综上,109 m^(2)焙烧炉采用富氧焙烧技术后获得了较好的经济效益,另外,还提高了焙烧系统、硫酸系统装置的利用率,降低了鼓风量,有效防止了烟尘的无组织排放,改善了现场生产环境。Application of oxygen enriched air roasting technology in zinc concentrate roaster has stayed in the experimental stage in China over the years.Chihong Zn&Ge is the first to have realized large-scale production of zinc concentrate by oxygen enriched air roasting.The company adds oxygen-enriched air distribution device on the original blast system piping,provided with fittings such as high concentration oxygen regulating valve group and instrumentations for flow and pressure monitoring,along with equipment optimization to fluidizing cooler,high-temperature ID fan and blower.Production practice shows that under proper process parameters,the production capacity of oxygen-enriched air roasting technology can be fully released,and the specific capacity of fluidized-bed roaster can be increased to 8.03 t/m^(2)·d;the quality of roasted ore can be improved effectively and the sulfur content of roasting dust can be lowered to 3.5%;the energy consumption per ton of zinc is greatly reduced the unit consumption of compressed air,electricity and high concentration oxygen are 194.0 Nm^(3)/t,135.80 kWh/t and 81 Nm^(3)/t respectively.In conclusion,the application of oxygen-enriched air roasting technology with 109 m^(2) roaster can obtain better economic benefits.It also improves the utilization rate of facilities of roasting system and sulfuric acid system,reduces the volume of blast,and effectively prevents fugitive dust,improving the production environment on site.

关 键 词：锌精矿 富氧焙烧 109 m^(2)流态化焙烧炉 床能率 焙烧矿质量 吨锌能耗 焙尘含硫 生产环境 

分 类 号：TF813[冶金工程—有色金属冶金] TF803.11