结晶器保护渣黏度检测实践

Viscosity Testing Practice of Mold Casting Powders

结晶器保护渣的黏度是评价保护渣质量的重要物理指标之一,准确地评价结晶器保护渣黏度,对指导连铸生产选择和使用结晶器保护渣具有重要意义。针对某公司使用的结晶器保护渣品种繁多、在黏度检测中表现各异的情况,介绍了在结晶器保护渣黏度检测中,对影响检测效率的试样烧炭、仪器系数标定、温度控制、熔渣深度和测头插入深度控制等方面的一些控制经验。结果表明:不同的保护渣品种应执行不同的烧炭温度、搅拌频次和烧炭总时长;熔渣深度宜控制在50mm左右;测头插入深度宜控制在12mm。

The viscosity of the mold casting powders is one of the important physical indicators for evaluating the quality of the casting powders.Accurately evaluating the viscosity of the mold casting powders is of great significance in selecting and using mold casting powders during continuous casting production.For the situation of a company using a wide variety of mold casting powders and they performing differently in viscosity testing,some control experiences in the viscosity testing of mold casting powders were introduced from the aspects of charcoal burning,instrument coefficient calibration,temperature control,control of depth of the molten casting powders and insertion depth of probe and so on.The results show that different mold casting powders should perform different charcoal burning temperature,stirring frequency and total charcoal burning time.The depth of the molten casting powders should be controlled at about 50 mm and the insertion depth of probe should be controlled at 12 mm.