These two types of ball valves are widely used in the blast furnace pulverized coal injection systems of domestic steel enterprises. They are installed on the blast furnace tuyere to connect the coal injection lance. When the coal injection lance is inserted into the blast furnace, the valve opens. When the coal injection lance is withdrawn from the blast furnace tuyere, the ball inside the ball valve automatically closes under the pressure of the blast furnace and its own gravity, preventing the hot gas inside the furnace from escaping.When the coal injection lance is inserted into the blast furnace tuyere through the quick-connect socket of the ball valve, the ball inside the valve is lifted by the lance, achieving a quick connection through the quick-connect head fixed on the coal injection lance with sealed packing and the quick-connect socket of the ball valve.

When the coal injection lance is withdrawn from the blast furnace tuyere, the ball inside the ball valve automatically closes under the pressure of the blast furnace and its own gravity, preventing the high-temperature gas inside the furnace from leaking.-3The steel ball and sealing seat of the type ball valve can be disassembled for inspection, replacement, and maintenance. The steel ball and housing can be made of carbon steel or stainless steel according to user requirements. This drawing shows a date-pit-shaped ball valve. Generally, ball valves are divided into two types based on their shape: one is the date-pit-shaped ball valve as shown in the figure, and the other is the square ball valve. These two types of ball valves are widely used in the blast furnace pulverized coal injection systems of domestic steel enterprises. They are installed on the blast furnace tuyere to connect the coal injection lance. This valve is installed on the blast furnace tuyere to connect the coal injection lance. It opens when the lance is inserted into the blast furnace and automatically closes when the lance is withdrawn, preventing the hot gas inside the furnace from escaping. This utility model relates to a blast furnace pulverized coal injection equipment, specifically an arc-swirl nozzle wheel for blast furnace pulverized coal injection.