摘要
钒渣钙化焙烧物料烧结,造成钒渣转浸率低,严重时将阻碍生产顺行。对钒渣钙化焙烧过程中物料烧结的原因及影响因素进行了研究。结果表明:当焙烧温度超过焙烧产物熔点时,低熔点物质由固相向液相转化,随着回转窑转动发生剧烈翻滚,形成直径较大的球状烧结料;焙烧温度和混合料中磁性物是影响物料烧结的主要因素;焙烧温度高于900℃,烧成带距离延长,低熔点物质拥有足够的时间形成较多的液相,发生烧结;混合料磁性物含量高,焙烧过程中氧化放热所升高的温度与焙烧温度发生叠加,局部温度可达1 000℃,使物料烧结严重。
Sintering of roasting materials during calcination of vanadium slag may lead to low leaching ratio or even interruption of production processes. Reasons for material sintering and various influencing factors were studied. The research results show that the solid low melting point materials transform into liquid phase when the roasting temperature is higher than the melting point of the product, and larger di- ameter spherical sintered materials generate with revolving of rotary kiln. Roasting temperature and mag- netic materials in the mixture are main factors for sinterlng. The length of firing zone is extended when the temperature is above 900 ℃, so low melting point materials have enough time to generate more liquid phase, result in sintering. With high magnetic material content in the mixture, temperature may be up to 1 000 ℃ locally due to superposition of the masting temperature and the temperature rising during exo- thermic oxidation in the roasting process, and as a result the materials are severely sintered.
出处
《钢铁钒钛》
CAS
北大核心
2013年第6期6-11,共6页
Iron Steel Vanadium Titanium
关键词
钒渣
钙化焙烧
烧结
温度
磁性物
vanadium slag, calcified roasting, sintering, temperature, magnetic material
