Research on Application of Cooling Substance in Electric Arc Furnace Frame Device

The consumption of refractories and the consumption of electricity must also increase, and the labor intensity of workers also increases. Since we are mainly steel, it is not possible to quickly repair the lining by using a high-temperature furnace body after the molten steel is released, as in the case of a regular smelting enterprise. Thus, before the furnace is opened in the absence of high-temperature sintering, the furnace must be repaired. Furnace lining. When the erosion is severe, it is necessary to carry out the repairs, and after the completion of the repair, a large amount of firewood and electric baking are required. Even so, the furnace order can only reach one heat.

For a long time, not only was a large amount of refractory materials and electricity wasted, but also the labor intensity of workers was increased. For this reason, we conducted trials and discussions on how to reduce the erosion of slag level. But the effect is not great. As soon as the hot spot is repaired, a large area of ​​the slag line will have to be removed. In view of this situation, we will change the direction of the main attack to test at high temperature hot spots. Using a partial water cooling box, after installation, it received a certain effect, and then we extended the local water cooling in the key area to the slag line position. As shown. After many times of smelting, the use effect is significant, and the number of minor repairs is decreasing day by day. The number of repairs is reduced from the original one heat to one heat and one heat. This is our estimate, and probably more.

According to the erosion situation of the furnace wall now, if reasonable ingredients and careful operation are adopted, proper protection measures will be taken for the water-cooling ministries, and there is still hope for further improvement. Not only has the worker's working conditions been improved, but also the consumption of refractory materials has decreased significantly. Whether the use of a water cooling box increases the heat loss in the furnace and delays the materialization reaction in the furnace is also a problem we are concerned about when using. From the theoretical analysis and practical results, we believe that steelmaking is a high temperature process, and the lining needs to be Operating at temperatures above °C, the charge is very heat-absorbing during the melting period. After the well is drilled, the arc is surrounded by scrap for a longer period of time.

In the oxidation phase, the molten steel is subjected to intense boiling and endothermic conditions. Therefore, the heat loss during these two stages is relatively small, and the radiation of the arc and the molten pool surface on the furnace wall and the furnace top is reduced. The temperature of the molten steel during the reduction is rather high. Diffuse slag with good fluidity has a strong ability to reflect arc light, and the lining is directly radiated by the arc.

This increases the thermal load on the lining. At this time, the loss of heat away from the water-cooled cycle is only some radiant heat. For the entire smelting, the change in the temperature difference has little effect, so that it is not possible to delay the progress of the materialization reaction in the furnace. We have calculated the electricity consumption before and after the use of water cooling. As a result, the consumption of water per ton of molten steel after the use of water-cooled tanks has been reduced. The practice has proved that the effect of water cooling on the lower part of the furnace wall has negligible influence on the smelting temperature. At the same time, it also greatly reduces the high slag content caused by leaching of slag line refractories.

The slag has poor fluidity, increased inclusions in the steel, and decreased steel quality. The use of water cooling in the lower part of the furnace wall is the most effective way to increase the heat dissipation of the furnace wall, reduce the hot spot temperature of the furnace wall, reduce the hot spot load on the furnace wall, and it is also a fundamental measure to extend the service life of the furnace. According to preliminary estimates, if repairs are performed on an as-needed basis and minor repairs are repeated several times, the fuel and electricity consumed for each baking in the mid-renovation oven will have saved nearly RMB 10,000. Save a lot of money for the country.

It can be seen that with the gradual increase in the number of orders, the economic effect will gradually increase. Therefore, this design is unreasonable. However, at this time, if the volume of the combustion chamber is measured by the cup titration method, the error due to the titration itself will become resistant. Therefore, it is difficult to measure the volume with this method to meet the accuracy requirements, and it is difficult to measure the volume between the calculated volume and the labeled volume. difference. The introduction of the above formula, especially the development and application of pots, spears, and spears, greatly facilitates the control and measurement of such combustion chambers. It is hoped that this formula can help and reference the same industry manufacturers and related host manufacturers.

The determination of the dimensional tolerances leads to the accurate calculation of the combustion chamber volume due to the derivation of the above formula. In this way, we can accurately determine the allowable machining tolerances of the combustion chamber, so that in the actual processing, measurement, as long as the actual tolerance of the size and shape tolerances is guaranteed, the combustion chamber volume can be guaranteed rather than relying on the calculation of tight tolerances. Inaccurate cup titration was measured.