Electromagnetic Stirrer System for Bloom, Billet, Slab

Electromagnetic Stirrer System for Bloom, billet, slab

Complete EMS System Configuration

EMS consists of coil, electric controller and cooling water system, electric control system consists of IPC, local control cabinet and inverter cabinet.

Technical Features of KEMEIDA EMS

A new algorithm has been developed by KEMEIDA and GL electromagnetic field software Co., names AGILD EM stirring algorithm, which uses new strip magnetic field differential integral equation.
This software can design electromagnetic parameters optimized. EMS shall be with high magnetic induction and stirring force. So stirring effect shall be great.
Stirring force can be calculated by this software according to different frequency and current. So the best frequency and current can be provided for user.
Optimized design shall be done for L/D. Iron core length shall be increased properly. So stirring effect shall be improved.
Kemeida has also other software for designing F-EMS to calculate best position of F-EMS.
Kemeida EMS uses low voltage and large current, which can avoid damage of peak voltage to insulation. It shall make reduce current leakage and prolong EMS life.
Frequency arrange shall be widened to choose the best frequency.
Put EMS lower properly to make magnetic field around meniscus as little as possible to ensure strong magnetic field.

Metallurgical Effect

(1).  Improving sub-surface and inner quality of steel

Increase equiaxed zone;
Reduce central segregation, porosity and shrinkage efficiency;
Reduce air holes,
pinholes and inclusion in the surface and subsurface;
Make surface temperature of slab symmetrical
Reduce inner cracks;
(2). Relax continuous casting production condition
Superheating ratio;
Caster centering;
(3). Expending steel grade
Rimming steel;
Free cutting steel;
Ball bearing steel
Bearing quality steel and so on;

According to different installation positions and  combinations are divided into three modules as following: 
(1) Mould EMS:MEMS:
EMS is Installed the mould zone, adopting rotary magnetic field. The rotary motion will be grow up in liquid steel
(2) Strand EMS:SEMS
EMS is installed the secondary cooling zone, adopting the rotary magnetic field or traveling wave field. The rotary motion or rectilinear motion will be grow up in liquid steel.
(3) Final Solidification Zone:FEMS
EMS is Installed the mould zone, normally, adopting rotary magnetic field. The rotary motion will be grow up in liquid steel.

Different metallurgical effect for installation position



Metallurgical effect

Application steel


cleaning solidification surface

Cutting crystal

Reducing overheat

Increasing the equiaxed rate 

Reducing surface and sub-surface air hole and pinhole 

Reducing surface and sub-surface slag including

Homogenize solidified shell 

Improving center shrinkage and center segregation  

Low alloy steel

Spring steel

Cold roll steel

Medium and high carbon steel


Cutting crystal 

Reducing overheat

Expand the equiazed rate

Reducing the inner crack 

Improving shrinkage

Reducing center porosity 

Stainless steel 

Tool steel


Well-distributed the element of liquid steel

Break the columns crystal    

Refining grains 

Improving the center segregation and V type segregation effectively 

Improving the center shrinkage and porosity 

Spring steel

Bear steel

Special high carbon steel


Guide for Model Selection

1. Arc radius of CCM, Strand space, pulling speed.
2. Parameters of Mould.
3. Steel grade, Cross section.
4. Power phase.