公开(公告)号：US4816758A

公开(公告)日：1989-03-28

申请号：US890193

申请日：1986-06-24

申请人： Wolfgang Theissen ,  Edmund Julius ,  Franz R. Block

发明人： Wolfgang Theissen ,  Edmund Julius ,  Franz R. Block

IPC分类号： G01F1/74 ,  B22D11/16 ,  B22D11/18 ,  B22D37/00 ,  B22D41/08 ,  B22D41/50 ,  C21C7/00 ,  G01V3/10 ,  G01N27/74 ,  G01N27/72 ,  G01R33/12

CPC分类号： C21C7/0025 ,  B22D11/186

摘要： A method and an apparatus for the detection of slag co-flowing within a sam of molten steel being poured from metallurgical vessel, more particularly during continuous casting, makes it possible to detect even a small quantity of slag in the emerging flow of molten metal without requiring the removal of the shielding for the pouring stream, or without interfering with the pouring, by measuring changes in the electrical conductivity of the pouring system by means of electromagnetic fields. To this end, one or more transmitter coils and receiver coils are mounted fixedly around the pouring stream. The transmitter coils are fed with a current containing several frequencies, and the magnitude and phase position of the voltage induced in the receiver coils are evaluated frequency-selectively so as to increase the sensitivity, the measuring transducer being operated in a bridge circuit. The change in electrical conductivity of the pouring stream and, hence, the quantity of slag, are determined from the magnitude and phase position of the voltage induced in the measuring coils. Temperature-dependent errors are largely suppressed.

摘要翻译： PCT No.PCT / EP85 / 00544 Sec。 371日期1986年6月24日第 102（e）日期1986年6月24日PCT提交1985年10月17日PCT公布。 出版物WO86 / 02583 日期：1986年5月9日。一种用于检测在冶金容器内浇注的钢水流内的炉渣共同流动的方法和装置，更特别地在连续铸造期间，使得可以检测到甚至少量的炉渣 不需要通过电磁场测量浇注系统的导电率的变化而不需要去除浇注流的屏蔽物，或不干扰浇注的熔融金属的流出。 为此，一个或多个发射器线圈和接收器线圈固定地安装在倾倒流周围。 发送器线圈馈送有包含多个频率的电流，并且频率选择性地评估在接收器线圈中感应的电压的幅度和相位位置，以便提高测量换能器在桥式电路中操作的灵敏度。 浇注料流的电导率的变化以及渣的量由测量线圈中感应的电压的大小和相位决定。 温度依赖性错误被大大抑制。