Purging System

Steel Ladle Gas Stirring

 

Gas Purging System Ladle gas stirring
systems are required
for better homogenisation
of temperature and
composition,
inclusion trapping and
slag-metal refining reaction
of the molten steel.
Ladle bottom after the heat Ladle gas purging plug 

 

 

Position Description

 

PP1a/S16E-W Purge plug S1a Sleeve

PP 

1a  

S16  

E

W

Purge plug

Shape group

16   slits

Wear indicator

Withdrawal jack adaptor

S

1a 

Sleeve

Shape group  
WB-SQ1-S Well block DR80/60 Distance ring

WB

SQ

1

S

Well block

Square

Shape group

Block with sleeve

DR

80

60    

Distance ring

Height of ring in mm

Inner hole diameter in mm
Shape group; 1a=270mm  2,2a,2b=360mm  3=450mm  4=520mm

 

 

Qualities

Meatacast®-1850/MA

Metacast®-1850

 

Gas Flow Test

 

Each purge plug is tested before delivery for gas leakages and flow rate with help of an automatic measuring system.

 

 

Models

 

Directional Models
  • Slit type plug
  • Ceramic plate type plug

 

 

 

Non-directional Models
  • Porous type plug
  • Hybrid type plug

 

Dynamic Models
  • 100% opening rate
  • Increased lifetime
  • Unlimeted gas flow
  • Custom made

 

 

Slit Type (S)

 

Small gas bubbles
even at high flow
rates
Flow rate can be
adjusted with slit
design
Careful cleaning of
the plug after each
heat is necessary

 

 

Slit Type (S)

 


 

 

 

Slit width can be reduced
further by addition of
stainless steel bands for
starting of the plug earlier
even when some of the
slits are clogged.

 

 

Wear Indicator

 

Optical wear indicator is a
porous high alumina refractory
material with 32x32mm square
cross-section at a residual thickness
of 120mm of purge plug. When the
purge plug is at residual thickness of
120mm after several heats of use,
the indicator becomes visible during
cleaning of ladle after continous
casting. Due to porous nature of high
alumina wear indicator, a spot
32x32mm in dark color becomes
visible when observed from inside
the ladle. When the indicator becomes
visible, the purge plug has to be
replaced with a new one immediately.

 

 

Ceramic Plate Type (CP)

 

Pressed and fired high
alumina ceramic plates
ensure excellent performance
of the plug by easy start of
gas flow at initial purging
Less wetting of the
ceramic plates help
cleaning of the plug
after the heat

 

 

Porous & Hybrid Types (POR)

 

Pressed and fired
high aluminia porous
insert protected with
a dense surrounding
castable for non-
directional purging
purposes
Addition of slits in
the surrounding
castable result in
a combined purging
system (hybrid)

 

 

Dynamic Plug (DYN)

 

  • 100% opening rate

As the plug is always closed when the gas
pressure is released, steel infiltration into
the gap is prevented which allows for 100%
opening rate
  • Increased lifetime

Since there is no steel infiltration in the
gap after use, there is no need for a high
opening pressure to spall of the infiltrated
part of the plug, resulting in increased lifetime
  • Custom made

Gasflow/pressure configuration can be
controlled by different settings on the
pre tension of the bottom plate which means
that the plug can be custom made for various
metallurgical conditions
  • Unlimited gas flow

The construction with a gap that grows with
increased pressure makes it possible to
achieve practically unlimited gas flow

 

 

 

 

Dynamic Plug (DYD)

 

 

System Refractories

 

Well block & Mounting plate

 

Distance ring Preinstalled sets

 

  Replacement sets
 

 

 

Accessoires

 

Extraction device Hot repair cap on replacement plug

 

 

Lifting hook on preinstalled sets

 

 

Seamless, gastight welding of bottom plate

 

 

Non-Return Valve

 

  • Prevents steel infiltration due to sudden pressure drops in the line
  • Stationary or replaceable types available

 

 

Safety Device

 

  • Replaceable safety device (multi-use)
  • Prevents steel leakages through purge plug
  • Acts as a distance ring with safety

 

 

Flow Rate

 

LADLE GAS PURGING PLUG / FLOW RATES (NL/MINUTE)
                     

POSITION

FLOW

  

POSITION

FLOW

  

POSITION

FLOW
                     

PP1a/S16E

      

PP1a/POR

      

PP1a/CP

    

1 bar

1.5 bar

  

1.5 bar

3 bar

  

1 bar

1.5 bar

minimum

557

678

  

minimum

204

445

  

minimum

171

241

maximum

594

708

  

maximum

283

486

  

maximum

287

400

average

575

690

  

average

240

465

  

average

220

320
                     
                     

PP2a/S16E

      

PP2a/POR

      

PP2a/CP

    

1 bar

1.5 bar

  

1.5 bar

3 bar

  

1 bar

1.5 bar

minimum

587

778

  

minimum

162

412

  

minimum

180

344

maximum

613

799

  

maximum

245

470

  

maximum

323

436

average

590

785

  

average

200

450

  

average

210

370
                     
                     

PP3/S24E

      

PP3/POR

      

PP3/CP

    

1 bar

1.5 bar

  

1 bar

1.5 bar

  

1 bar

1.5 bar

minimum

278

442

  

minimum

134

200

  

minimum

376

434

maximum

430

531

  

maximum

145

240

  

maximum

404

483

average

370

490

  

average

138

220

  

average

395

470
*long term statistical values measured at athmospheric conditions by compressed air, they do not represent guaranteed range of
  values.

 

 

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