Device for obtaining slag flow-out signal in casting steel with ladle

Abstract

A device for obtaining the slag flow-out signal in casting steel with ladle is composed of sine wave oscillator, transconductance amplifier, peak detector, numerally controlled resistance network as voltage divider, filter amplifier, voltage comparator, bi-stable trigger, mono-stable trigger, Rs trigger and relay. Its advantages are high reliability and correctness, maximal steel output and minimal slag flowing in ladle.

Description

technical field [0001] The invention relates to a non-electricity detection technology, in particular to a device for acquiring molten slag outflow signals during ladle pouring. Background technique [0002] The present invention applies the non-electrical measurement technology to establish an automatic detection device for the non-oxidation continuous casting production line. When the pouring of the ladle is nearing the end, once the slag flows out, the sensor installed at the tap hole of the device will feel the transformation of the steel slag. And convert this conversion into electric signal, after circuit processing and amplification, it becomes the driving signal for slag lowering alarm and closing ladle sliding nozzle, so as to realize automatic ladle closing with maximum steel output and minimum slag outflow effect. [0003] In the prior art field, the published application date is February 22, 1986, and the application number is the "slag de...

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Problems solved by technology

The device based on the above structure has the following disadvantages: 1. The simple excitation source has no automatic adjustment function, which cannot adapt to the fact that the replacement sensor has manufacturing errors and the diameter of the ladle expands after multiple pouring operations; 2. Due to the fact that the ladle With a large heat capacity, the temperature change speed of the sensor part is much slower than the slag outflow speed, and the slag outflow only occurs at the end of pouring steel. In fact, the extremely slow temperature change will not cause interference, but in the ladle During the steel pouring process, the anti-interference circuit failed to suppress the powerful mechanical and electrical interference existing in the steel plant environment; 3. The result of using the pulse width discriminator and delay circuit is that the inherent time between the slag flowing out and the closing bag is increased Delay, causing excessive slag to flow into the tundish, affecting the detection effect of the entire device

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