铁水包耐材提升意见与实际案例分析 Suggestions and practical case analysis on the improvement of hot metal ladle refractory

July 01, 2020

铁水包耐材提升意见与实际案例分析

Suggestions and practical case analysis on the improvement of hot metal ladle refractory

 

1 铁水罐衬侵蚀机理

铁水罐砖衬与渣铁水(主要是铁水)直接接触,温度较高,铁水罐砖衬受侵蚀、损坏主要表现:

l)铁水罐底部砖衬受高落差下降铁水冲蚀作用。

2)     圆周砖衬受高温渣铁的化学侵蚀反应

3)     装铁水时温度急剧升高热震作用。

4)     卸掉铁水后高温砖 与空气 、氧气 、水蒸气等氧化性气体接触时易被氧化

5)  罐衬黏渣铁成块后 ,钩渣铁块清理时砖层被破坏 。要求铁水罐砖衬耐材具有耐火性能好,不黏渣铁,抗渣铁侵蚀性好 ,高温结构强度高,耐磨性好 ,耐急冷急热性好 的特性。

 

Corrosion Mechanism of Iron ladle Lining

Hot metal ladle brick lining and slag iron water (mainly hot metal) direct contact, high temperature, hot metal ladle brick lining erosion, damage mainly show:

1 )At the bottom of hot metal ladle, the brick lining is eroded by high drop.

2)chemical erosion reaction of circular brick lining by high temperature slag iron.

3)  Heat shock when temperature rises sharply when hot metal is loaded .

4) high temperature brick lining is easily oxidized when contact with oxidizing gases such as air, oxygen and water vapor after removing hot metal.

5) The brick layer is destroyed when the hook slag iron block is cleaned. It is required that the brick lining refractory of hot metal tank has the characteristics of good fire resistance, no slag iron, good corrosion resistance of slag iron, high strength of high temperature structure, good wear resistance, and good resistance to rapid cooling and heat.

 

2常见铁水包材质对比

{C}1)      {C}常见粘土砖,高铝砖,碳化硅砖,铝碳砖

它们受侵蚀的主要机理如下。

高铝砖易受碱金属和热应力的侵蚀作用。

2 Comparison of common hot metal ladle materials

1) common clay brick, high aluminum brick, silicon carbide brick, aluminum carbon brick

their main mechanisms of erosion are as follows.

High aluminum bricks are susceptible to erosion by alkali metals and thermal stresses.

碳化硅易受碱性熔渣侵蚀。

silicon carbide is susceptible to alkaline slag erosion.

铝碳砖经过氧化再碱蚀 ,其热震性能降低 ,残余强度极低。

After oxidation and alkali corrosion, the thermal shock property of aluminum-carbon brick decreases and the residual strength is very low.

 

 

2)通过分析高铝砖砌筑铁水罐使用情况及效果 ,比较以上耐材特点, A ISiC —C 砖综合了碳化硅砖 、铝碳砖优点,用其砌筑铁水罐效果较好。替代高铝,铝碳砖砌筑铁水罐,以实现延长铁水罐使用寿命大于 900 次/罐的目标。

Through analyzing the usage and effect of high-aluminum brick masonry ladle and comparing the above characteristics of refractory, ASC brick combines the advantages of silicon carbide brick and aluminum carbon brick, and the effect of masonry iron water tank with it is better. Replacing high aluminum, aluminum carbon brick masonry iron tank to achieve the goal of prolonging the service life of hot metal ladle more than 900 times / LADLE.

以中国某钢厂实际效果分析

2007 7 月份开始,在不影响高炉生产的前提下,采用了alSiC —C 砖逐步替代高铝砖对铁水罐进行砌筑使用,使用寿命平均455 个月提高到了8 个月以上,使用次数超过 900 次,37 个罐平均使用次数达到1 016.

 

Analysis of the actual effect of a steel plant in China:

Starting from July 2007, without affecting the production of blast furnace, AL- SiC —C brick was gradually replaced by high-aluminum brick for the masonry use of molten iron ladle. The average service life increased from 4.55 months to more than 8 months, the number of times of use exceeded 900, and the average number of use of 37 tanks reached 1 016.