Mending material for hole of going melting steel is a kind of new magnesia-alumina quality block material.Manually operation or crown block deal with mended part only.This material is proof ersion,resisitance washing,upstanding automatically flowing fettle under high temperature,high cling rate,can flareout flow over whole of mended part,and then strongly adhensive bond to eroded part,shortly sinter time(15-25min),less pollute to environment,slash the time of mending furnace.This material is a large of wide flat of converter to bottom of trunnion.

Rl ing with MgO-c quality
MgO% ≥80
C% ≥7.5
Pile density g/cm3 ≥1.45
Bulk density g/ cm3 ≥2.1
Modulus of rupture ≥5.0

Electric furnace bottom ramming material

SL-1 SL-2 SL-3 SL-4 SL-5
MgO% ≥80 ≥80 ≥80 ≥80 ≥80
CaO% 4～6 7～9 6～8 10～15 8～10
SiO2% ≤1.2 ≤1.5 ≤1.5 ≤1.5 ≤1.3
Grain size mm 0～5 0～5 0～6 0～6 0～5
Cold crushing strength 1200℃×3h ≥10 ≥10 ≥10 ≥10 ≥10
1600℃×3h ≥25 ≥30 ≥30 ≥25 ≥25
Change of curve 1200℃×3h ≤±0.5 ≤±0.5 ≤±0.5 ≤±0.5 ≤±0.5
1600℃×3h ≤±1 ≤±1 ≤±1 ≤±1 ≤±1
Fe2O3% 4～6 5～7 6～8 3.5～4.5 3.5～4.5
Application range Cold mending for electric furnace bottom Cold ramming foreletri furnace bottom Cold ramming for ferro alloy furnace bottom



Tap hole pl ing compound
Item MgO% SiO2% Fe2O3% Grain size
mm Bulk density
g/cm3 Cold compressive strength
index ≥46 ≥12 ≤8 ≤6 2.85 31