Steel, aluminium, ferroalloys and metal processing. Danfoss builds the drive, power conversion, thermal and automation technologies. Danfoss PowerNEU engineers, combines, executes and supports them across the plant, from raw material handling to the finishing line.
The plant map below walks the process stage by stage: the rotating assets involved, where drives, thermal and electrification opportunities sit, what a retrofit looks like, and where DPN's own engineering scope begins and ends.
Four priorities come up in almost every steel and metals conversation. We engineer around them from the first application study.
Continuous production in heat, dust, vibration and heavy loads, with fewer unplanned stops and less maintenance.
Precise speed and torque control from the electric arc furnace to the rolling mill, for consistent product quality and less scrap.
Energy-efficient drives, regenerative braking energy recovery and support for electric arc furnace and renewable-powered routes.
Safety functions built into the drive, backed by application support and training for plant teams.
Raw material handling → coke oven → sinter and pellet → blast furnace → steel melt shop → continuous casting → rolling → processing and finishing → utilities.
Yard reception, stockyard management and conveying, where continuous-duty equipment demands precise motor control and shock-load resistance.
Major rotating assets: stackers, reclaimers, wagon tipplers, rotary breakers, belt conveyors, vibrating screens.
Typical drive applications: conveyor drives such as VACON® NXP Air Cooled, stacker bucket wheel, boom and slewing drives on closed-loop vector control, travel drives on master-follower torque-shared control.
Thermal opportunities: motor cooling on high-duty conveyor drives, dust suppression pump circuits.
Electrification opportunities: common DC bus sharing across multiple stacker and reclaimer drive axes to reduce transformer sizing.
Energy-recovery opportunities: regenerative braking on long downhill conveyor runs and slewing drives.
Retrofit possibilities: replacing DOL or soft-started conveyor motors with VFDs for controlled start and stop and reduced belt wear.
DPN engineering scope: application study, drive sizing, panel assembly, FAT, site commissioning.
Danfoss technologies: iC7-Automation, VLT AutomationDrive FC 302, VACON NX common DC bus.
Coke oven batteries and by-product recovery, where pusher and quenching car positioning has to be precise and repeatable under high ambient heat.
Major rotating assets: coke oven pushers, quenching cars, dry quenching hoists, ring coolers, mixers, dust extraction fans.
Typical drive applications: positioning drives such as VLT® AutomationDrive FC 302 for pusher and quenching car travel, hoist control for dry quenching.
Thermal opportunities: panel cooling and enclosure protection for drives operating near the oven battery.
Electrification opportunities: standardizing on one drive platform across the pusher machine fleet.
Energy-recovery opportunities: handled by the dry quenching process itself; DPN's role is control precision, not thermal process design.
Retrofit possibilities: upgrading legacy DC pusher machine drives to AC VFDs.
DPN engineering scope: control panel refurbishment, drive repair, spares planning.
Danfoss technologies: VLT AutomationDrive FC 302, VACON NX.
Sintering, pelletizing and lime calcination, where fan and feeder energy consumption is one of the largest controllable loads in the plant.
Major rotating assets: sinter strand, pelletizing drums, disc feeders, dust extraction and exhaust fans, lime kiln blowers.
Typical drive applications: AC drives such as VACON® 100 INDUSTRIAL for disc feeders, pelletizing drums, dust extraction and exhaust fans, cooling fans, lubrication station oil pumps.
Thermal opportunities: SONDEX® Standard Gasketed Plate Heat Exchangers and cooling solutions for auxiliary circuits.
Electrification opportunities: consolidating fan and feeder drives onto a common platform for easier spares management.
Energy-recovery opportunities: replacing damper-throttled fan control with VFD control for direct energy savings. As a rule of thumb for variable-torque loads such as fans and pumps, a 20% reduction in motor speed typically gives about 50% energy savings.
Retrofit possibilities: damper-to-VFD fan conversion, feeder drive modernization.
DPN engineering scope: energy mapping, drive optimization, FAT.
Danfoss technologies: VLT and VACON AC drive families, plate heat exchangers.
Blast furnace and direct reduced iron (DRI) charging and auxiliary systems, where hoist load sharing directly affects both safety and mechanical wear, and stable air flow keeps dust extraction and exhaust fans reliable under high shock loads.
Major rotating assets: blast furnace loading car hoists, mixers, hot air furnace systems, slag cars.
Typical drive applications: master-follower control using VACON® NXP Air Cooled for blast furnace loading car hoists, typically 160 to 450 kW.
Thermal opportunities: SONDEX® Standard Gasketed Plate Heat Exchangers for cooling circuits on furnace auxiliary systems.
Electrification opportunities: common DC bus configuration for multi-motor hoist loads.
Energy-recovery opportunities: limited; priority here is load-sharing accuracy over energy recovery.
Retrofit possibilities: upgrading single-motor hoist drives to a master-follower, load-shared configuration.
DPN engineering scope: application engineering, panel assembly, commissioning.
Danfoss technologies: VACON NX common DC bus, VLT AutomationDrive FC 302.
The safety-critical hoisting, tilting and transfer systems in the melt shop, where load balancing and operational stability are non-negotiable.
Major rotating assets: converter tilting drives, oxygen gun hoist, grab bucket crane, casting crane, ladle transfer car, AOD or RH refining systems.
Typical drive applications: master-follower converter tilting drives using VACON® NXP Liquid Cooled with load sharing across multiple tilt motors over Danfoss System Bus, closed-loop hoist control for oxygen gun and out-of-furnace refining hoists.
Electric arc furnace (EAF): drives for precise electrode control support stable furnace operation, lower electrode consumption and energy cost, and better steel quality, using high-overload drives built for the EAF environment.
Thermal opportunities: crane drives engineered for high temperature, humidity and dust.
Electrification opportunities: Danfoss System Bus load-sharing architecture across tilt motors.
Energy-recovery opportunities: regenerative braking on crane hoist drives.
Retrofit possibilities: modernizing legacy melt shop crane drives to closed-loop, load-shared control.
DPN engineering scope: FAT testing, application engineering, lifecycle service.
Danfoss technologies: crane-duty VLT and VACON drives over Danfoss System Bus.
References: Danfoss VACON drives regulate the electromagnetic stirring process at Třinecké železárny, the largest steelworks in the Czech Republic, executed by Danfoss's system integrator partner, not DPN. Liquid-cooled VACON active front-end drives also control a grabber crane at Tata Steel IJmuiden, a Danfoss reference not executed by DPN.
Ladle turret, withdrawal and straightening, and electromagnetic stirring, where torque response and closed-loop accuracy determine product quality.
Major rotating assets: ladle turret, withdrawal and straightening machines, EMS, SEMS and FEMS stirring coils.
Typical drive applications: low-frequency power supply for electromagnetic stirring at the crystallizer (EMS), secondary cooling zone (SEMS) and final straightening point (FEMS), each improving strand surface quality and reducing centerline segregation, plus VLT® AutomationDrive FC 302 drives for ladle turret and withdrawal and straightening machines.
Thermal opportunities: SONDEX® Standard Gasketed Plate Heat Exchangers for secondary cooling water circuits.
Electrification opportunities: unbalanced three-phase EMS power supply architecture.
Energy-recovery opportunities: limited; priority here is casting quality and uptime.
Retrofit possibilities: upgrading EMS power supplies on existing casters.
DPN engineering scope: application engineering, commissioning.
Danfoss technologies: VACON NXP.
References: VACON NXP drives regulate EMS for reliable 24/7 continuous casting at Třinecké železárny, executed by Danfoss's system integrator partner, not DPN.
Hot strip, cold rolling, tandem, reversing and skin pass, plate, bar, wire rod, section and rail and TMT mills, where power range and tension control drive product quality.
Major rotating assets: roughing and finishing mill stands, coilers, winders, flying shears, laminar flow cooling systems.
Typical drive applications: medium-voltage inverters such as VACON® 3000 in the 4 to 10 MW range for roughing and finishing mills, closed-loop tension control for cold rolling and pickling lines, closed-loop position and velocity control on flying shears for precise cut timing, and open-loop vector control on roller tables sized for the rapid load changes as billets enter and exit each stand.
Torque and dynamics: high torque and a highly dynamic response, even at low speed, in both hot and cold rolling. Smooth acceleration and deceleration reduce mechanical stress on the mill, extending equipment life and limiting downtime.
Thermal opportunities: SONDEX® Free Flow Plate Heat Exchangers for laminar flow cooling systems.
Electrification opportunities: medium-voltage drive architecture across the mill train.
Energy-recovery opportunities: regenerative braking on reversing mill stands.
Retrofit possibilities: migrating legacy DC mill drives to AC medium-voltage systems.
DPN engineering scope: application engineering, FAT, commissioning, lifecycle support.
Danfoss technologies: medium-voltage inverters, closed-loop tension control systems.
References: engineering, installation and commissioning of VACON NXP common DC bus units on a new rail production line at Baogang, executed by Vacon's system integrator partner, not DPN.
Pickling, galvanizing, annealing, coating, tinning, slitting and inspection lines, where process heat and line tension both matter.
Major rotating assets: pickling line tension rollers, coating and galvanizing line drives, slitting lines.
Typical drive applications: closed-loop tension control using VLT® AutomationDrive FC 302 across pickling and finishing lines.
Line functions: precise speed and torque control, multi-drive synchronization, integrated motion control, encoder feedback and condition-based monitoring, to reduce strip breaks, thickness variation, scrap and downtime on galvanizing, annealing, pickling and color coating lines.
Thermal opportunities: SONDEX® Plate & Shell Heat Exchangers (SPS) for annealing furnace and galvanizing line process heat.
Electrification opportunities: consolidating finishing line drives onto a common platform.
Energy-recovery opportunities: waste heat recovery from annealing furnace exhaust.
Retrofit possibilities: tension control upgrades on ageing pickling and finishing lines.
DPN engineering scope: application engineering, thermal system design support.
Danfoss technologies: drives with closed-loop tension control, plate heat exchangers.
EOT and hot metal cranes, cooling, de-dusting, water treatment, captive power and personnel/goods lifts, threaded through every process stage from raw material handling to finishing.
Major rotating assets: de-dusting and desulfurization fans, wastewater treatment pumps, hydraulic oil cooling systems, EOT and hot metal cranes, personnel and goods lifts.
Typical drive applications: high-power de-dusting and desulfurization fans using VACON® NXP Air Cooled, typically 800 to 2,000 kW on sinter dust extraction duty, water treatment and lubrication station oil pumps, VLT® Lift Drive LD 302 for plant personnel and goods lifts.
Thermal opportunities: SONDEX® Standard Gasketed Plate Heat Exchangers and SONDEX® Spiral Heat Exchangers, BOCK compressors, Danfoss Turbocor oil-free compressors.
Electrification opportunities: standardizing utility fan and pump drive platforms plant-wide.
Energy-recovery opportunities: VFD-driven fan and pump energy savings, crane hoist energy recovery.
Retrofit possibilities: DOL-to-VFD conversion across the utility fleet.
DPN engineering scope: energy mapping, predictive diagnostics, remote monitoring, repair, refurbishment, spares planning, training.
Danfoss technologies: plate and spiral heat exchangers, BOCK compressors, Danfoss Turbocor compressors, drives.
What Danfoss drives bring to the hardest environments in the plant, and what that means for engineering and spares.
Back-channel cooling is standard above 90 kW and can cut the need for external cooling by up to 90%. Rated for ambient temperatures from -25 to +50 degrees C, extendable to 60 degrees C with derating, and up to 1,000 m without derating (4,400 m with derating).
Enclosure ratings from IP00 to IP66 depending on frame, with IP66 up to 90 kW and IP54 above. Coated circuit boards to class C3, with class C4 on request, for aggressive atmospheres.
A shared platform with a unified operating design and parameter structure lets the same drive serve conveyors, fans and more, so plants stock fewer unique parts and maintenance gets simpler.
Low-harmonic drives can be paralleled for large motors, with built-in redundancy, alongside active and passive filters. Fieldbus support includes PROFIBUS, PROFINET, Modbus, EtherNet/IP, EtherCAT, POWERLINK, DeviceNet, CANopen and OPC UA.
Figures are Danfoss published values and depend on the drive selected. DPN confirms ratings against the data sheet at the application study stage. Source: Danfoss, robust VFDs for steel and metals industries.
Recent work at a leading Indian steelmaker, engineered and executed by DPN around existing production schedules and shutdown windows.
Complete crane control electrics for 13 EOT cranes across the hot strip mill, steel melt shop, cold rolling mill and blast furnace.
Main hoist upgraded within a planned shutdown, with drive tripping eliminated.
A legacy thyristor supply replaced with an active front end feeding 16 existing inverters, executed on a live production line.
Condition-based monitoring uses data the drive already has, so early warnings reach maintenance teams without adding sensors on most assets.
Analyses the motor current signature to detect winding damage early, before it becomes a burnout. No external sensors required.
An external 4 to 20 mA sensor feeds the drive, which correlates vibration with motor speed to flag unbalance, misalignment, looseness and mechanical resonance.
The drive learns the normal load curve of the application and flags moves above or below it, such as pump wear, fouling, clogged filters, leaks or machine friction.
1. Assess. A site assessment of installed drives, lifecycle status, criticality and risk, with a mitigation plan.
2. Connect. An edge IoT gateway links drives to cloud or on-premise monitoring.
3. Monitor. Live KPIs, alarms and events, fault history, automatic daily parameter backup and condition-based dashboards.
4. Act. Maintenance planned on actual usage and load, with a spares plan and expert troubleshooting.
Start with the critical drives in one area, build the baseline, then extend plant-wide.
DrivePro® Services →
Not a product catalogue split by division. Each solution below is engineered around one plant problem, drawing on whichever Danfoss technologies it takes to solve it.
Load-shared crane drives with energy recovery for melt shop and casting cranes.
See the engineering approach →Recovering process heat from annealing, galvanizing and furnace exhaust into usable plant energy.
See the engineering approach →Plant-specific engineering using Danfoss drives, controls, cooling and related technologies.
OEM-grade diagnostics, drive repair, heat exchanger servicing, spares and FAT.
AI and machine learning diagnostics, predictive maintenance, digital twins, dashboards and energy mapping.
Simulation-based technical training, application training and Danfoss certification.
Connect with Danfoss PowerNEU for application engineering, product selection, panel support, FAT testing, repair, refurbishment, spares and lifecycle service.
