超低碳钢板坯连铸保护渣

超低碳钢板坯连铸保护渣

Slag for Continuous Casting Ultra-Low Carbon Steel Slab

（预熔型中空颗粒系列连铸结晶器保护渣）

(Pre-melting hollow grain series)

1、 产品特点：超低碳钢因含有一定量的碳，所以相比之下它更易被渣封，导致其夹渣缺陷发生率较高和容易发生增碳。针对性的确定保护渣的粘度，提高渣、钠界面张力，可有效地防止粘渣，另外还必须降低保护渣的凝固温度、适当地增加热流、尽量减少自由碳的配入量。降低保护渣对铸坯的增碳作用。并通过控制熔化速度和增加渣的绝热性能等措施提高了渣的专用性。

Product Description: Because of containing a certain amount of carbon, the ultra-low carbon steel is more frequent to find sealed by slag, resulting in defects of slag inclusion and recarburization. Determining slag’s viscosity and to improve slag-sodium interfacial tension can prevent slag sticking. Meanwhile, we decrease slag’s solidification’s temperature as well as ration of free carbon, and increase rate of heat flux, so as to reduce slag’s recarburization to the steel slab. We also enhance the slag’s specificity through controlling melting speed and improving slag’s adiabaticity.

2、产品型号Product Model：FGY-5

3、适用钢种 Steel Applicable：含碳量＜0.005的超低碳钢

Ultra-low carbon steel with below 0.005% carbon content

4、适用断面Section Applicable：（150-250）mm×(800-1600)mm

5、适用拉速 Casting Speed Applicable：0.7-1.8m/min

6、主要理化指标Main Physicochemical Indicators：水份water content（%） 粒度granularity（mm） CaO/SiO2 半球点

Above melting point（℃） 熔速Melting speed （1350℃） 粘度Viscosity （1300℃） 容重Unit weight（g/C㎡） ≤0.5 0.15-1≥90% 0.8-0.95 950-1080 20-30s 1.5-4泊 0.5-0.9