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…
The sliding nozzle is composed of upper and lower sliding plates and 4 refractory bricks for the upper and lower nozzles. The pouring of each ladle of molten steel must pass through the upper and lower sliding plates and the upper and lower nozzles, so they are very strict. Firstly, they must have sufficient strength…
Refractory materials for sliding nozzles: nozzle block bricks; upper and lower slide plates; upper nozzles; lower nozzles; drainage sand for nozzles. I shared the skateboard with you in the front, and now I have sorted out the physical and chemical indicators and usage methods of the water inlet and the water outlet, cleaning methods and…
Slitting knife sticks to steel The sticking of steel on the slitting knife refers to the phenomenon that the two sides or one side of the slitting knife stick to the slag during the slitting and rolling production process, which will eventually lead to the failure of the slitting. The main reasons for the sticking…
Analysis and Countermeasures of Accidents in the Rough and Middle Rolling Area After the rolled piece is bitten into, pile steel between the racks cause of issue: (1) The rolling speed and roll diameter are not set correctly; (2) The tension setting is too small after changing the roller (groove); (3) The steel temperature fluctuates…
The world’s largest tubular mold (220×1250) was poured successfully!
Hot stuffing Process characteristics and process: use the sensible heat of high temperature liquid slag to sprinkle water to produce physical and mechanical effects and the hydrolysis of free calcium oxide to fragment the slag Advantages: simple process, suitable for processing high basicity steel slag, steel slag has high activity, good stability, and can handle…
In the converter steelmaking, the normal feeding sequence is: scrap-molten iron, that is, first add a certain amount of scrap to the converter, and then start adding molten iron. Adding scrap steel first is more from a safety perspective. First, the residual temperature in the furnace can be used to bake the scrap, evaporate the…
During rolling, the cold roll is subjected to strong internal and external forces such as rolling pressure, bending moment, and shear stress, resulting in cracks in the roll and peeling of the working surface, and the welds, inclusions, and edge cracks of the rolled parts can easily lead to instantaneous high temperatures, resulting in Accelerated…
