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HEATWORKS

dipanjan.daspoddar@heatworks.in +91 9051985890
PURGING SYSTEM ISOSTATIC REFRACTORIES FLOW CONTROL MECHANISM

PURGING SYSTEM

PURGING PLUG

Slot Plug
  • Gas slots variable for special gas flow rate
  • 8, 12, 16 or 24 slots
  • Without / with lamellas
Turbo HP Plug
  • High purging rate and gas flow controllability due to separate ring channel and tangential slots
  • 42mm HP-Channel and 12 slots
  • Effective wear indication
Linear Core Plug
  • High fired blue spinel monolithic core
  • Highly resistant to slag/steel adhesion
  • Minimal oxygen cleaning
  • Increased plug lifetime
  • Optimum gas purging availability (6 or 8 slot design)
  • Fast on/off gas reaction time
  • Reduced direct & indirect costs

HOUSING BLOCK

ISOSTATIC REFRACTORIES

LADLE SHROUD

The most important role of the ladle nozzle is to prevent re-oxidation of the liquid steel and pickup of nitrogen by protecting the molten steel from air engrossment, while transporting the steel from ladle to tundish. This non-oxidation casting with the shroud has been widely adopted by many steel plants and has contributed to improve quality and yield rate.

The challenges remain in three driving factors for the advances of ladle shroud: maximizing the shrouding effect from air ingress, exploring multiple functions, and solving thermal shock issues.

OUR SOLUTIONS
  • Airtight gaskets for better sealing.
  • Bell & Reverse Taper designs for submerged casting.
  • Argon purging arrangement (Porous Insert & Direct Injection type)
  • High performance slag zone reinforcement.
  • Ceramic fiber wrapping arrangement in outer surface.
GASKETS

Ceramic gaskets facilitate in making the fitment between collector nozzle and ladle shroud to be as airtight as possible. It thereby helps in reducing air ingress to a great extent, thereby helping us achieve higher quality and more clean steel.

MONOBLOCK STOPPER

Monoblock stoppers are used to control the flow of steel from the tundish to the mould. These are isostatically pressed refractories, which are made out of Alumina - Graphite along with special coating on the surface to prevent decarburization and provide resistance to oxidation.

OUR SOLUTIONS
  • MBS for steel foundry applications.
  • Arrangement for Argon purging.
  • Cross Pin type or Direct Screw Fastening types available.
  • Stopper tip made up of special reinforcement using High Alumina, Magnesia or Spinel based materials.
Reasons for Refractory Damage
  • API - Corrosion by Ca in steel.
  • Free Cutting Steel - Oxidation by free oxidation in steel
  • Stainless Steel - Carbon oxidation by Cr2O3 and steel infiltration.
OUR SOLUTIONS

API – Our stoppers have much experience in API casting and have been levelled up continuously.

FREE CUTTING STEEL – AIN containing material has shown good performance.

STAINLESS STEEL –
  • Special material prevents the infiltration of stainless steel in casting.
  • STS 304 -10h(=440min) -Erosion Speed=0.01mm/ch

Sub entry nozzle/ Sub entry shroud

Sub Entry Nozzle/ Sub Entry Shroud is used to control the flow of liquid steel from the tundish to the mould. It is required for the prevention of re-oxidation of the steel during its flow from the tundish to the mould. SEN/ SES are basically isostatically pressed refractories using Alumina - Graphite as the main body material.

OUR SOLUTIONS
  • Special designs for prevention of alumina clogging.
  • High performance slag layer using Zirconia - Graphite to give utmost slag resistance.
  • Reinforcement of seat area using High Alumina or Magnesia.
  • Glaze coating & Ceramic Fiber wrapping to prevent oxidation of refractory and thermal shock.
  • Facilities for gas purging.

FLOW CONTROL MECHANISM

TUBE CHANGING MECHANISM- ZKB 70H

ADVANTAGES
  • Hydraulic operation
  • Simple Cost-Effective Design - Few Moving Parts
  • Modular Assembly - Less Distortion, Easy Repair
  • Symmetrical Layout - Not Handed, Fewer Spares
  • Common Pusher - Fewer Spares
  • Single Cylinder - Compact, Small Footprint
  • Hydraulic Power - Smooth Operation
  • Detachable Cylinder - Stays on Car
  • Simple Control System
  • Safety Shut-Off

TUNDISH NOZZLE CHANGER- CRB08.2

INTRODUCTION
  • The quick nozzle changer system type “CRB 08”, is a mechanism two refractory plates, project for diameter until 20mm
  • The load application between the refractory plates is obtained through levers and 8 springs pack.
  • The quick nozzle changer is driven by a hydraulic cylinder.
  • Fixed Pneumatic Cylinder (No need to remove during nozzle changing
  • Increased safety of operators through dedicated instrument to insert Nozzles.
  • Both Upper and Flying Nozzles are installed inside the system.
  • Nozzle changing in less than 400 ms.
  • Fixed Nozzle has round section and flying Nozzle has square section. This ensures perfect surface covering.
  • Less mechanical parts and hence lower cost.
ADVANTAGES
  • Extend casting sequence
  • Maintain tundish level for maximum quality
  • Re-start at designed speed
  • Change Nozzle on individual strand
  • Emergency Blank
  • All refractories come pre-assembled with Mechanism.
  • Change Nozzle without removing cylinder.
  • Net weight of the gate including refractories is only 19 Kgs
  • The Frame design and the material guarantee high strength.
SAFE OPERATION
  • Double Opening Hinge.
  • Two independent spring pads for each rocker.
  • Safety devise to stop wrong application of cylinder.
  • High Coaxial Precision with the refractory nozzle changing.
  • Preparation / Testing of spring checking
  • Improvement of operational safety
  • Fast & Frequent spring control.
  • Reduce Non-operational time.

LADLE SLIDE GATE- GM ST2

DESIGN
  • Compact and innovative ladle gate concept designed for bore sizes up to 100 mm.
  • Self -opening door allows trouble free access to the refractory components and tensioning elements. The unique assembly principle, as well as the built-in safety features, allows reliable operation and extended mechanical lifetime.
  • The GM-ST 2 has been designed for “no tool” operation to enhance security and reliability as well as optimizing the time for changing of the refractory components
ADVANTAGES
  • Reliability and operational safety
  • Lower refractory costs per ton of steel
  • Automatic pressurizing system
  • Self-opening door technology
  • Optimized configuration of face pressure
  • Quick assembly and low maintenance
  • Horizontal and vertical applications
  • Easy access to ladle bottom (double hinge)

QUICK FIT-IN PLATES – The octagonal shaped plates, designed by finite elements and engineered to allow optimal stress distribution, are hold with a set of magnets and do not need any further clamping devices.

FACE PRESSURE– The unique and concentric configuration of the heat resistant tension elements guarantee optimal face pressure distribution and highest refractory performance.

FOR ANY TYPE OF LADLE – Vertical or horizontal installation with manual opening or automatic opening with the hydraulic cylinder

TUNDISH SLIDE GATE- TM

Our “TM” Tundish gate is provided with 3 plates in order to avoid the movement of the sub entry shroud in the mould during the flow control by throttling

ASSEMBLY AND DESIGN
  • Easy assembly and maintenance, designed to minimize the number of components, either on-line or off-line
  • Fastening with bolts
  • Easy detachable hydraulic cylinders
  • Hydraulic cylinders are installed on the tundish car and are easily disconnected form the gate
  • All hydraulic circuits are closed loop
  • Separate preheating of submerged nozzle
  • High safety standard for operators and CCM
ADVANTAGES
  • Precise flow control
  • Longer casting sequence at continuous caster
  • Easy handling due to the compact design
  • Automatic casting start-up
  • Automatic bath level control in the mould
  • Visualization of the casting process
MOLD LEVEL CONTROL CABINET
  • Three plate gate system (bore size 35mm or 40mm)
  • Designed for fully automatic casting operation
  • Direct connection between submerged nozzle and lower plate
  • Inert gas application on tundish nozzle and joints
  • Air-tight system concept supported by argon bath principle.
SCOPE OF SUPPLY
  • Mould Level Control Cabinet
  • Visualization and Process control
  • Mould Level Measuring System
  • Operator Panel and Control Boxes
  • Tundish Slide Gate mechanism
  • Hydraulic power unit
  • Hydraulic components on tundish car
  • Accessories for preparation area