For the sintering of the furnace lining, the purpose is to make the quartz sand dry shock material solidified and form a 2-4CM ceramic surface, which is what we call the sintered layer. For the quartz sand material, it is the cristobalite phase. The ceramic surface of this layer will directly contact the hot metal. The purpose of its existence is to prevent hot metal from penetrating into the lining and resist the damage caused by the impact of the charging material on the lining during the charging operation. The following is introduced to you by the furnace lining repair material manufacturer

       1. The role of temperature sensing wire

       In the sintering work, the overall temperature control is very important, in order to clearly understand the temperature in the furnace, we will be connected at the bottom, the middle of the 2-3 temperature measurement points, according to the detected temperature to carry out our sintering process.

       2. Lining sintering ** Add charge

       Neutral lining material sharing before the sintering process, we should give priority to the chemical composition of its material, because the main material of our quartz sand lining material is silicon oxide, and from the thermal dynamics analysis, C and Si need a balance ratio at a certain temperature, the higher the temperature of liquid iron and the higher the content of C is. The Si content of molten iron needs to be greater, because we have a holding period of 1580-1600 degrees in the lining sintering process, during which if the liquid iron contains high C content and the Si content does not reach the required balance ratio, then the molten iron will accelerate the absorption of silicon from the lining to balance this ratio, resulting in premature erosion and thinning of the lining, affecting its service life. In addition, if the C and Si contents of our baking materials are low, the amount of iron oxide and manganese oxide will increase at a higher temperature. These oxides will react with the silica on the surface of our furnace lining to form iron silicate and manganese silicate, and the melting point of these two substances is below 1350℃. It also reduces the service life of our furnace lining by thinning it prematurely.

The above information is provided by the furnace lining repair material manufacturer

       Taking into account the above two points and another is to consider the density of the added oven material, the entire melting process of our electric furnace is the conversion of electric energy into magnetic field energy through the coil, and then the magnetic field is converted into electric energy in the reaction with the metal charge, and then a conversion from electric energy to heat energy. Because the crucible is a metal mold crucible during the oven, if the feeding space inside the furnace is loose, The local crucible will overreact to the magnetic field, causing it to be heated too fast, and the deformation will be raised inward (partly also related to the thickness of the crucible mold), and at this time, the furnace lining quartz sand has not been sintered and solidified, and the refractory will fill the space of the mold deformation, resulting in the reduction of the density of the furnace lining material, affecting its service life.

       According to the furnace condition, we can first add one-third of the relatively small piece of clean cast iron return charge in the furnace, because the bottom is the place where the molten iron is melted, the return charge can **C, Si balance ratio, and then add two-thirds of the pig iron block, and add a certain amount of ferrosilicon alloy in it. Pig iron is added because of the regular shape of pig iron, which can increase the feed density. The relatively high carbon content in pig iron can be used to supplement the carbon burning loss in hot metal during high temperature sintering, and the role of adding part of ferrosilicon is to ** the balance ratio of C and Si in hot metal.

       The above is the information shared by the furnace lining repair material manufacturer, if you want to know more, please pay attention to us! Anaijie: Let you use the rest assured, give you intimate service, furnace lining material development and production enterprises, steel foundry... Suppliers! Welcome to telephone consultation!