钒钛磁铁矿焙烧竖炉操作参数对传热过程的影响  

Effects of Operation Parameters on Heat Transfer in Shaft Furnace for Vanadium Titano-Magnetite Roasting

作　　者：骆旭峰 张晟[1] 孙用军 董辉[1] LUO Xu-feng;ZHANG Sheng;SUN Yong-jun;DONG Hui(SEP Key Laboratory on Eco-Industry, Northeastern University, Shenyang 110819, China;AVIC Commercial Aircraft Engine Co., Ltd., Shanghai 200241, China)

机构地区：[1]东北大学国家环境保护生态工业重点实验室,辽宁沈阳110819 [2]中航商用航空发动机有限责任公司,上海200241

出　　处：《东北大学学报（自然科学版）》2019年第1期53-57,87,共6页Journal of Northeastern University(Natural Science)

基　　金：国家科技支撑计划项目(2015BAB18B00)

摘　　要：以年产量2×10~4t钒钛磁铁矿焙烧竖炉为研究对象,建立竖炉内三维稳态传热数理模型.通过UDF(user defined functions)将反应热以内热源形式编译到固相能量方程中,定义球团矿下移速度,以竖炉内的焙烧时间和温度为判断指标,研究操作参数对竖炉内传热过程的影响.结果表明:焙烧风流量、冷却风流量以及球团下移速度为3个主要影响因素,其中球团下移速度对传热过程的影响更明显.在球团直径为38 mm,焙烧时间为4～6 h,焙烧温度为1 100～1 200 K的条件下,竖炉适宜的操作参数为:冷却风流量1 210～1 430 m^3/h;焙烧风流量3 070～3 670 m^3/h;球团下移速度0. 258～0. 290 m/h.With a shaft furnace of 2×10^4 tons annual capacity for vanadium titano-magnetite roasting as the research object, a three-dimensional steady-state heat transfer mathematical model of shaft furnace was established.The reaction heat was complied into solid phase energy equation in the form of internal heat source by UDF and the pellet velocity was defined.The roasting time and temperature were used as the evaluation indexes in order to study the effects of operation parameters on heat transfer performance.The results show that the roasting and cooling air volume rates and the pellets velocity are three main factors and the influence of the last one is the largest.Under the conditions of 38 mm pellet diameter, 4~6 h roasting time and 1 100~1 200 K roasting temperature, the suitable operating parameters are obtained as: the cooling air volume rate is 1 210~1 430 m^3/h;the roasting air volume rate is 3 070~3 670 m^3/h;and the moving down velocity of pellets is 0.258~0.290 m/h.

关 键 词：钒钛磁铁矿 焙烧竖炉 传热 数值模拟 移动床 

分 类 号：TK112[动力工程及工程热物理—热能工程]