钢带炉碳热还原制备超细铁粉的物料升温规律研究  

Study on material temperature increasing rule for preparing ultrafine iron powder by carbon thermal reduction in steel strip furnace

作　　者：郭培民[1] 王多刚[1] 王磊[1] 孔令兵 GUO Pei-min;WANG Duo-gang;WANG Lei;KONG Ling-bing(The State Key Laboratory for Advanced Iron and Steel Processes and Materials,Iron and Steel Research Institute Beijing 100081,China)

机构地区：[1]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081

出　　处：《粉末冶金工业》2020年第4期8-11,共4页Powder Metallurgy Industry

基　　金：国家自然科学基金委员会-中国宝武钢铁集团有限公司钢铁联合重点研究基金资助(U1560201)。

摘　　要：本文通过建立钢带炉内物料加热模型,研究了超细铁粉及碳粉混合物料在钢带炉内的加热温度分布规律。研究结果表明:纯铁精矿粉、碳粉混合料在钢带炉上、下加热模式下,物料温度以物料厚度中心为对称点,呈对称分布,上层、底层温度高,中心温度低。物料越薄,物料中心温度越高,所需加热时间越短。50 mm物料加热到800℃需要28 min,而150 mm物料加热2 h未能达到800℃。当平均温度加热到800℃,所需时τ/min=13.24-0.021h/mm+0.006 4h2。In this paper,the heating temperature distribution of superfine iron powder and carbon powder mixture in steel strip furnace was studied by establishing the heating model of material in steel strip furnace. The main research results show that the material temperature is symmetrical distribution with the center of material thickness as the symmetrical point,the upper and bottom temperature is high,and the center temperature is low,when mixture of pure iron concentrate powder and carbon powder heating from the top and bottom of steel strip furnace. The thinner the material is,the higher the central temperature of the material is,and the shorter the heating time is. 50 mm material can be heated to 800 ℃ in 28 minutes,while 150 mm material can not reach 800 ℃ in 2 h. When the average temperature is heated to 800 ℃,the relationship between the time and the material thickness h is as follows:τ/min=13.24-0.021 h/mm+0.006 4 h2.

关 键 词：钢带炉 超细铁粉 温度分布 还原 加热 

分 类 号：TF123.21[冶金工程—粉末冶金]