Product Description
Manufactured within our specialized rolling mill auxiliary equipment base in Jingjiang, our Tmt Cooling Section Box is an inline water-quenching cooling header system engineered for high-speed wire rod and bar rolling mills to achieve Thermo-Mechanical Treatment (TMT). Drawing on 26 years of heavy fabrication experience and serving premier steel groups like Baowu, Nangang, and Shagang, we construct each Tmt Cooling Section Box with stainless steel header tanks, quick-change inner nozzle cartridges, labyrinth splash baffles, and water-stripping blowers. By delivering controlled, high-pressure water quenching to rolled bars at speeds up to 110 m/s, this responsive Tmt Cooling Section Box controls finish-rolling and laying-head temperatures with precision, refining austenite grain structures and establishing the required surface martensitic ring, providing bar and rod mills with a dependable metallurgical cooling asset.
Applications
High-Speed Wire Rod Mills: Controlling finishing and laying temperatures to produce fine-pearlitic wire rod.
High-Strength Rebar Rolling Lines: Providing initial water quenching to produce weldable high-strength rebar (grades HRB400, HRB500).
Alloy Steel Bar Mills: Controlling intermediate cooling between roughing, intermediate, and finishing blocks.
SBQ & Special Steel Bar Lines: Achieving fine-grained microstructures on round bars for downstream automotive forging applications.
Technical Specifications
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Design Standards |
Metallurgical Rolling Mill Water Cooling Equipment Standards, ISO 9001 |
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Structural Configuration |
8-meter to 10-meter modular cooling boxes with quick-change nozzle cartridges, tail water strippers, and air blowers |
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Rolling Speed Range |
5 m/s to 115 m/s |
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Product Size Capacity |
Wire rods Ø5.5 mm to Ø25 mm; Rebar/Round bars Ø10 mm to Ø50 mm |
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Cooling Water Flow Rate |
50 m³/h to 450 m³/h per box (Closed-loop proportional control) |
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Operating Water Pressure |
0.6 MPa to 2.5 MPa |
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Materials |
All non-contact components fabricated from 304/316L stainless steel; wear guides made from wear-resistant cemented carbide or hardened alloy |
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Temperature Control Tolerance |
Bar exit temperature controlled within ±10°C |
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Automation Platform |
Siemens S7-300 PLC with Advantech industrial PC supervisory control |
Customization Capabilities
Quick-Pack Replaceable Nozzle Sleeves: Modular nozzle cartridges designed for rapid tool-less exchange, reducing changeover times during rolled dimension switches.
Labyrinth Splash Seals & Low-Level Drainage: 5mm stainless steel splash covers with multi-stage labyrinth baffles and low-level drains that prevent water spray onto surrounding stands.
Integrated Tail Water Strippers & Air Blowers: High-velocity air knives and mechanical water strippers that strip water off bar surfaces instantly as they exit the cooling box.
Automated Pneumatic Three-Way Bypass: High-speed pneumatic three-way diverter valves that bypass water flow within 0.1 seconds during head and tail passage to prevent cold ends.
Zero MOQ Restriction: Custom engineered for individual cooling box retrofits or delivered as complete multi-box TMT line packages.
Quality Control
Manufacturing Accreditations: ISO 9001:2015, ISO 14001:2015, and ISO 3834-2 welding quality management.
Full Process QR Code Traceability: Stainless steel header tanks, nozzle sleeves, guide pipes, and automated valves carry individual QR codes linked to certified test records.
Hydrostatic & Flow Simulation Testing: 100% hydrostatic testing at 1.5 times operating water pressure, accompanied by hydraulic flow uniformity tests across all nozzles.
PLC Automation Validation: Full factory loop testing of PLC temperature-control logic, valve response times, and instrumentation.
Heavy Ocean Packaging: Sturdy steel transport frames, nozzle protection caps, moisture barrier wrapping, and rigid wooden crating.
FAQ
Q: How does the quick-pack cooling nozzle reduce maintenance costs compared to older designs?
A: Older designs require replacing the entire nozzle body when worn. Our quick-pack design uses an independent, wear-resistant inner sleeve inside a permanent outer holder, cutting replacement component costs by roughly half and speeding up changeovers.
Q: What is the typical fabrication lead time for a TMT cooling section box?
A: Manufacturing, nozzle machining, and electrical control integration typically require 3 to 4 months from drawing sign-off to delivery.
Q: What warranty coverage do you provide?
A: We provide an 18-month warranty from site arrival or 12 months from commercial operation (whichever comes first).
Q: What payment terms are accepted?
A: Standard commercial terms are 30% advance deposit, 40% manufacturing milestone payment, and 30% balance prior to export shipment, payable in USD, EUR, or RMB.
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