Cooling Water System for Oxygen Lance | Basic Metal Manufacturing

Q: What is the primary function of the Cooling Water System?

The primary function is to continuously circulate water through the oxygen lance to absorb and carry away intense thermal energy generated during oxygen injection, preventing lance overheating, deformation, and failure, thus ensuring operational safety and extending equipment lifespan.

Q: What are the typical operating pressure and temperature ranges?

The operating pressure is typically 1.0–1.6 MPa, inlet temperature 20–35°C, outlet temperature 40–60°C, with a temperature rise of 15–25°C. These are reference ranges; verify for your specific model.

Q: What materials are commonly used in the system?

Common materials include carbon steel for piping and headers, copper alloy for heat exchanger tubes, and stainless steel (SS304) for fittings and valves. Material standards referenced are ASTM A106/A312.

Q: How does the system maintain water quality?

Water quality is maintained within pH 7–9 and conductivity below 2000 µS/cm, as per GB/T 1576. Regular monitoring and treatment are required to prevent scaling and corrosion.

Product Specifications

Technical details and manufacturing context for Cooling Water System

Definition

The Cooling Water System is a critical subsystem of the Oxygen Lance System used in basic oxygen furnaces (BOFs) and electric arc furnaces (EAFs). Its primary function is to continuously circulate water through the lance body to absorb and carry away intense thermal energy generated during the oxygen injection process, preventing lance overheating, deformation, and failure, thereby ensuring operational safety and extending equipment lifespan. The system typically includes a water reservoir, pumps, piping, valves, and a heat exchanger (such as a cooling tower or plate heat exchanger). Water is pumped from the reservoir through the lance's annular space or internal channels, absorbing heat from the lance tip, which is exposed to temperatures often exceeding 1600°C. The heated water then returns to the heat exchanger, where it rejects the absorbed heat to the environment before being recirculated. This forced-convection cycle maintains the lance within safe temperature limits. Key parameters include cooling capacity (500–2000 kW), flow rate (100–400 m³/h), operating pressure (1.0–1.6 MPa), inlet temperature (20–35°C), outlet temperature (40–60°C), temperature rise (15–25°C), pressure drop (0.05–0.15 MPa), water quality (pH 7–9, conductivity <2000 µS/cm per GB/T 1576), and materials such as carbon steel and SS304 (ASTM A106/A312). The system is skid-mounted with dimensions approximately 3000×1500×1800 mm and weighs 1500–3000 kg dry. Power consumption ranges from 15–45 kW. These values are reference ranges and must be verified for the specific model and application. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

Cooling water is pumped from a reservoir through the annular space or internal channels of the lance. As the lance tip is exposed to extreme temperatures (often exceeding 1600°C) from the molten metal bath, the water absorbs heat, undergoes a temperature rise, and is then returned to a heat exchanger (like a cooling tower or plate heat exchanger) where it rejects the absorbed heat to the environment before being recirculated. This creates a continuous forced-convection cooling cycle.

Common Materials

Carbon Steel (Piping/Headers), Copper Alloy (Heat Exchanger Tubes), Stainless Steel (Fittings/Valves)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Cooling Capacity	500–2000 kW	Based on oxygen lance heat load
Flow Rate	100–400 m³/h	Ensures adequate heat transfer
Operating Pressure	1.0–1.6 MPa
Inlet Temperature	20–35 °C	Higher inlet reduces cooling efficiency
Outlet Temperature	40–60 °C	Max 60°C to prevent scaling
Temperature Rise	15–25 °C	Indicates heat removal performance
Pressure Drop	0.05–0.15 MPa	Affects pump selection
Water Quality	pH 7–9	Conductivity < 2000 µS/cmGB/T 1576
Material	Carbon steel / SS304	SS304 for corrosion resistanceASTM A106 / A312
Power Consumption	15–45 kW	For pumps and controls
Dimensions (L×W×H)	3000×1500×1800 mm	Skid-mounted, footprint varies
Weight	1500–3000 kg	Dry weight, excluding water

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Cooling Water Pump
Provides the necessary pressure and flow to circulate water through the lance and the external heat rejection loop.

Material: Cast Iron / Stainless Steel
Heat Exchanger (Cooling Tower/Plate)
Transfers heat from the warmed return water to the atmosphere or a secondary cooling medium.

Material: Galvanized Steel / Copper Alloy / Stainless Steel
Water Distribution Manifold
Directs cooling water from the main supply line into the multiple channels or the annular space of the lance.

Material: Carbon Steel / Stainless Steel
Temperature & Pressure Sensors
Monitor critical parameters to ensure the system operates within safe limits and trigger alarms or shutdowns if thresholds are exceeded.

Material: Stainless Steel (Housings)
Control Valves & Piping
Regulate flow, isolate sections for maintenance, and transport water throughout the system.

Material: Carbon Steel / Stainless Steel
Water Reservoir
The tank the pump draws from and the return water comes back to; it is what makes the loop closed.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Oxygen Lance System

View system integration details

Manufacturers of Cooling Water System

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Frequently Asked Questions

What is the primary function of the Cooling Water System?

The primary function is to continuously circulate water through the oxygen lance to absorb and carry away intense thermal energy generated during oxygen injection, preventing lance overheating, deformation, and failure, thus ensuring operational safety and extending equipment lifespan.

What are the typical operating pressure and temperature ranges?

The operating pressure is typically 1.0–1.6 MPa, inlet temperature 20–35°C, outlet temperature 40–60°C, with a temperature rise of 15–25°C. These are reference ranges; verify for your specific model.

What materials are commonly used in the system?

Common materials include carbon steel for piping and headers, copper alloy for heat exchanger tubes, and stainless steel (SS304) for fittings and valves. Material standards referenced are ASTM A106/A312.

How does the system maintain water quality?

Water quality is maintained within pH 7–9 and conductivity below 2000 µS/cm, as per GB/T 1576. Regular monitoring and treatment are required to prevent scaling and corrosion.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Max 10 bar (operating), 15 bar (test)
flow rate:	50 to 500 m³/h (system dependent)
temperature:	5°C to 95°C (inlet to outlet)
slurry concentration:	Max 5% solids by weight

Cooling Water System

Product Specifications

Applied To / Applications

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