The steel mill ball valve (also known as the lance check valve) is a key component of the blast furnace pulverized coal injection system, primarily used to control high-temperature gas sealing and ensure the safety of pulverized coal transportation.
Advantageous Features:
High Sealing Performance: Multi-layer sealing design ensures zero leakage;
Strong Pressure Resistance: Shell test pressure reaches 0.9 MPa;
Low Failure Rate: Compact structure, with detachable and replaceable steel balls and valve seats for easy maintenance.

Application Scenarios and Selection Recommendations
Scenario Positioning: Installed on the blast furnace tuyere, connecting the coal injection lance and the pulverized coal transportation pipeline, suitable for blast furnace coal injection systems in domestic steel enterprises.
Selection Reference:
Date Pit Shape: Universal type, suitable for most injection conditions;
Square/Elbow Type: Used when adapting to special pipeline layouts.
This comprehensive description is based on industry-standard technical specifications. Specific parameters should be determined according to actual working conditions and the manufacturer's technical documentation.