The flux injection system market was valued at USD 0.7 billion in 2025. The market is projected to reach USD 0.7 billion in 2026 and USD 1.0 billion by 2036, expanding at a CAGR of 4.4% during the forecast period. Powder injection is expected to lead the injection medium segment with a 52.3% share in 2026. Hot metal desulfurization is projected to remain the leading application with a 36.8% share in 2026.