ইস্পাত শিল্প

Configuration Diagram of Refractories

Refractories for Steel-making Furnace:

Castables and precast blocks for EAF Poof
Castables and precast blocks for LF roof

Refractories for Ladle & Tundish :

Dry ramming mix for EAF bottom
Dry ramming mix for intermediate Frequency furnace

Functional refractories for con-casting:

Castables series for ladle lining
Shaped refractories for ladle
Dry vibrating mix for tundish
Coatings series for tundish
Castable for the permanent lining of tuna dish

Functional Refractories for Con-Casting :

Slag Tile(Weir) and impact pad
Shroud, Monolithic Stopper, and Submerged entry nozzle for billet, slab, thin slab
Continuous casting)
Zirconia metering nozzles for billet Continuous casting

Refractories for Heating Furnace :

Refractory castables for working lining of the Heating furnace
Plastic refractories for heating furnace
Light-weight insulating castables for Heating furnace
Gunning mix for converter and ladle
Precast chrome corundum abrasion-resistant bock for heating furnace
Refractory fiber products for heating Furnace (felt, blanket, board and module)

Refractories for converter :

Magnesium carbon brick
Tapping hole block
Overall steel outlet
Gunning mix for tapping hole
Magnesium gunning material
Repair refractory for converter
Filling material for converter steel outlet
Cold joint material for converter
Hot repair material for converter

Magnesia carbon brick :

Magnesia carbon bricks are made of high melting point alkaline oxide magnesium oxide (melting point 2800℃) and high melting point carbon materials that are difficult to be infiltrated by slag as raw materials, adding various non-oxide additives and combining them with carbon binders Do not burn carbon composite refractories. Magnesia carbon brick has good high temperature resistance, strong slag resistance, good thermal shock resistance and low high-temperature creep.

আইটেম	MT-8	MT-12	MT-14
MgO，% ≥	82	78	76
গ，% ≥	8	12	14
Apparent Porosity，% ≤	6	5	4
Bulk Density，g/cm³ ≥	2.98	2.95	2.93
ঠান্ডা নিষ্পেষণ শক্তি，MPa ≥	30	35	40
Modules of Rupture(1400*0.5জ)，MPa ≥	5	8	12

ম্যাগনেসিয়া ইট :

Magnesia bricks have periclase as the main crystal phase, which is the main product in alkaline refractories. It has high refractoriness and good resistance to iron oxides, alkaline slag and high-calcium fluxes.

আইটেম	MZ-92	MZ-95	DMZ-97	DMZ-98
MgO，% ≥	92	95	96.8	97.5
সিও₂，% ≤	3	2.5	1.5	1.0
CaO，% ≥	2.5	2.0	1.2	1.2
Apparent Porosity，% ≤	18	18	16	15
Bulk Density，g/cm³ ≥	2.92	2.95	3.10	3.15
ঠান্ডা নিষ্পেষণ শক্তি，MPa ≥	55	60	70	80
0.2MPa R-U-L ，℃ ≥	1550	1600	1700	1700
তাপীয় শক প্রতিরোধের ，1100℃ ≥	10	10	8	8

Silica Bricks :

Silica brick is made of quartz stone material, the content of SiO2 is above 93%,it has good resistance to acid slag and good heat conductivity. And the refractoriness is 1690~1710°C,RUL is beyond 1620°C.

আইটেম		RG-95
		Furnace Wall Bricks	Checker Brick
Chemical composition	সিও₂	≥95
	আল₂ও₃	≤1.0
	ফে₂ও₃	≤1.2
Apparent Porosity %		≤22	≤24
Real Density g/cm³		≤2.33	≤2.34
Cold Crushing Strength MPa		≥40	≥30
0.2MPa R-U-L ℃		≥1650
Residual quartz %		≤1.5
Creep Rate % 0.2MPa 1500℃ 0h~50h		≤0.8
Thermal expansion rate % 1000℃		≤1.28

Unshaped Refractory For Steel Industry :

আইটেম	সূচক
আইটেম	Aluminum Magnesium Spinel Castable	Corundum spinel Castable	Low Cement High Alumina Castable	Mullite Artesian Castable
MgO，% ≥	13	3.5	–	–
আল₂ও₃, % ≥	70	92	70	75
ফে₂ও₃, % ≤	–	–	1.2	1.0
Real Density，g/cm³ ≥	2.8	3.1	2.8	2.75
Modules of Rupture,MPa ≥	6	9.2 1400℃*0.5h	9	10
ঠান্ডা নিষ্পেষণ শক্তি,MPa ≥	42	64	65	100
Linear Change Rate，% 1500℃*3h	±1.0	0~0.5	±0.6	0~-0.5