What’s wrong with the temperature of the molten pool being too high or too low in the Steelmaking and blowing process? key word: Steelmaking and blowing Too high: Difficult to convert the slag. If the temperature is too high, the decarburization reaction becomes more intense, causing the FeO in the slag to maintain a very…
What is the cause of the “ladle overturn”? What are the preventive measures? key word: ladle overturn When the ladle is deep and the clumped alloy slag is not melted, when the alloy melts, it may be the steam formed by the water content of the alloy or the calcium steam formed by the calcium,…
The drawing illustrates and briefly analyzes the changing law of the decarburization rate during the blowing process.- steelmaking decarburization Keywords: steelmaking decarburization In the early stage of blowing, due to the greater affinity between Si and oxygen, Si rapidly oxidizes, and the decarburization rate is small. As the oxidation of Si ends and the temperature…
What is the significance of the decarburization reaction to the steelmaking process? Keywords: steelmaking decarburization (1) The carbon in the molten iron is oxidized by the decarburization reaction to be close to or equal to the specification range of the carbon in the molten steel during tapping. (2) A large number of CO bubbles generated…
What are the basic conditions for steelmaking dephosphorization? Write the chemical reaction formula. Keywords: steelmaking dephosphorization Under steelmaking conditions, P cannot be directly oxidized and removed by oxygen. Only the combination of oxides (P2O5) and (CaO) to generate stable and complex compounds can be effectively removed. The influencing factors are: (1) Slag basicity: Increasing R…
What are the three stages of furnace steel conversion? What is the law of the decarbonization reaction in each stage? key word：Furnace steel blowing, steelmaking decarburization Generally speaking, the conversion of a furnace of steel can be divided into three stages: the initial stage, the middle stage and the final stage according to the characteristics…
The function of the tension leveler The arc continuous casting machine is the main force in the production of cast billets in the iron and steel industry. Square billets, rectangular billets and round billets are generally produced by arc continuous casting machines, occupying a dominant position, even if the continuous casting machine adopts a straight…
The effect of phosphorus on the properties of steel Phosphorus exists in the form of iron phosphide in steel, generally represented by [P]. Its specific effects on steel properties are: 1) It can deteriorate the welding performance of steel; 2) Reduce the plasticity and toughness of the steel, and make the steel cold brittle, that…
The ladle degassing refining method is the main method of refining outside the furnace (also known as secondary steelmaking). Out-of-furnace refining is the process of transferring the molten steel smelted in a roughing furnace (electric furnace and converter) to another high-temperature vessel (mainly a ladle) for refining: Refining is a process of using different metallurgical…
Before installing the upper nozzle on the online ladle, first check the usage of the nozzle block. If there are pits or cracks, use the repair material to repair, and then perform the next step. Take the upper nozzle brick for trial installation, check the gap between the nozzle brick and the seat brick and…
