钢包内衬耐材的技术进步措施案例分享 ladle refractory layer long life case share

October 12, 2020
钢包浇注料
ladle castable 
 
钢包采用套浇,即当内衬侵蚀超过原厚度一半时,清除包衬上的残渣残钢,先补浇包底,再坐上胎模补浇包壁,补浇后的内衬尺寸和新包内衬相同,经烘烤即可重新投入使用,使用次数与新包相仿。由于补浇用料只相当新内衬用料量的1/3~1/2,节约大量耐火材料消耗。在钢包没有严重冷钢冻结事故的情况下,套浇可以不断循环下去,这样就基本实现了残存耐火材料的零排放。
 
The ladle adopts casing , that is, when the lining erosion exceeds half of the original thickness, the residual steel on the liner is removed, the bottom of the ladle is filled first, and then the lining size is the same as the new liner. The times of use are similar to those of the new package. Because the recharge material is only 1/3~1/2 of the new lining material, a large amount of refractory consumption is saved. In the case of ladle without serious cold steel freezing accident, casing pouring can be continuously circulated, which basically realizes the zero discharge of residual refractories.
 
例如,莱钢130t钢包采用剥皮套浇修砌工艺,并用喷补续衬焊接技术进行小修,经3次小修的4次包龄达190次以上,工作衬耐火材料消耗同比套浇工艺降低0.61kg/t钢。然后再对工作衬进行剥皮套浇中修,再续衬3次小修,依此循环8~9个周期,可使钢包浇注工作衬寿命达1500次以上。如果将浇注料进一步优化,套浇及喷补技术进一步提高,不但钢包寿命大大提高,而且基本做到残存耐火材料的零排放。
 
For example ,130 t ladle of Laigang adopt peeling sleeve pouring and repairing technology, and spray continuous lining welding technology is used for minor repair. After 3 minor repairs, the age of 4 times is more than 190 times, and the consumption of working lining refractories is reduced by 0.61 kg/t steel. After that, the working lining is peeled and cast in medium repair, and then the lining is renewed for 3 times. According to the cycle of 8~9 cycles, the working lining life of ladle pouring can reach more than 1500 times. If the castable is further optimized and the technology of casing pouring and spraying is further improved, not only the life of ladle is greatly improved, but also the zero discharge of residual refractory is basically achieved.
 
 
钢包红包接钢,加速周转,防止粘渣
Steel ladle red envelope steel, accelerate turnover, prevent sticky slag
 
钢包使用高铝质及一些碱性耐火材料内衬,包壁容易粘渣或结瘤,随着使用次数增加,粘渣越积越厚,造成有效容积减少,空包重量增加,如果达到或超过行车起吊重量,就给生产带来安全隐患。粘渣严重的只好拆除,这样使包龄降低,耐火材料消耗增加。采用红包接钢,加快钢包周转,急冷急热减少,包衬裂纹减少,粘渣就轻。山东某钢厂为加快钢包周转,编制了炼钢—精炼—连铸的钢包路径计划,有空包行走路径和重包行走路径计划。钢包有序调度,加大红包利用率,不但减轻钢包挂渣,还降低了能耗。
 
The ladle is lined with high aluminum and some alkaline refractories. The wall is easy to stick slag or nodule. With the increase of the number of times of use, the slag accumulates thicker and thicker, resulting in the decrease of effective volume and the increase of empty package weight. If you reach or exceed the lifting weight, it will bring safety risks to production. Serious slag had to be removed, so that the package age reduced, refractory consumption increased. Adopt red envelope to connect steel, speed up ladle turnover, reduce rapid cooling and heat, reduce lining crack, stick slag light. In order to speed up the ladle turnover, a steel ladle path plan, empty ladle walking path and heavy ladle walking path plan were worked out in a steel-making-refining-continuous casting steel ladle. Orderly scheduling of ladle and increasing utilization rate of red envelope not only reduce slag, but also reduce energy consumption
 
钢包挂渣的原因比较复杂,与炼钢工艺、钢种、耐火材料的材质和质量、钢包保温、钢包周转快慢等因素有关。其中加快周转、红包接钢是比较通用的办法。当然也有的耐火材料对所有钢种基本上都不粘渣,如蜡石砖。它的侵蚀机理是以熔蚀为主,与钢水熔渣接触形成黏度很高的液相层,阻止熔渣渗透,而且受热后具有微膨胀、内衬整体性好等优点。
 
The reason of hanging slag of ladle is complicated, which is related to steelmaking process, steel grade, material and quality of refractory material, heat preservation of ladle, turnover speed of ladle and so on. Among them speed up turnover, red envelopes steel is more common method. Of course, some refractories are basically non-stick slag to all steel types, such as wax brick. Its erosion mechanism is mainly corrosion, contact with molten steel slag to form a high viscosity liquid layer, prevent slag penetration, and after heating has the advantages of micro-expansion, good lining integrity and so on.
 
其次是钢包口结渣亦不能忽视,会使包口有效面积减小,造成倒渣不干净。往往采用烧氧切割或机械拆除,大多会破坏包衬,还消耗大量劳力。
 
Secondly, the slagging of ladle mouth can not be ignored, which will reduce the effective area of ladle mouth and cause the slag to be unclean. Often use oxygen cutting or mechanical removal, most will destroy the lining, but also consume a lot of labor.