Using converter slag as an electrolyte, under a gas atmosphere, when the temperature is reached, the carbon electrode and the iron electrode are inserted into the slag, and the two electrodes are connected with a thick copper wire. In the slag, bubbles continue to emerge at the carbon electrode, but are very calm at the iron electrode. After the menstruation, the graphite electrode immersed in the slag eroded heavily, but the iron electrode did not change. In the same manner, converter slag was used to perform the experiment under a gas atmosphere, but the iron electrode and the carbon electrode were respectively connected to positive and negative electrodes of an external dry battery pack. When the slag temperature reached, it was found that the slag surface at the carbon electrode plus the back electromotive force and the iron electrode was calm and no bubbles escaped. The appearance of the carbon electrode after the test was almost the same as that before the test, and the carbon electrode did not become fine and did not exhibit loosening and roughening of the surface.
In actual smelting, the value of the electromotive force should be much higher than that measured because of the higher temperature. In addition, in the actual production process, the three-phase boundary between carbonaceous material and molten iron or molten steel and molten slag is actually in a short-circuit state. Therefore, its resistance is estimated to be much lower than the experimentally measured resistance. If calculated, the corrosion current estimate is reachable. Therefore, the corrosion rate is relatively large. In the actual production process, there should not be only one slag metal liquid to corrode the battery at the three-phase junction, but there should be many corrosion micro-cells. Therefore, the erosion rate and quantity caused by these microbatteries cannot be ignored. When the additional back electromotive force is greater than the electromotive force of the high-temperature corrosion cell slag, the test confirms that the erosion of the carbon electrode and the escape of bubbles are immediately suppressed. The addition of back-EMF can prevent the erosion of carbon. This strongly proves that the carbon erosion of the carbon-containing refractory at the three-phase boundary of molten steel slag is mainly caused by electrochemical erosion.
Polishing Liquid Compound,Car Polishing Compound,Meguiars Compound And Polish,Buffing Compound For Cars
Jiangmen Gude Polishing Equipment Co., Ltd , https://www.kokipolishing.com