Category · MgO 35 – 95% · Max 1700 – 1800 °C

Basic Refractories — Magnesia & Dolomite Refractory Bricks

Basic refractories are magnesia-based or magnesia-blended refractory bricks engineered for service in chemically basic environments — slags rich in CaO and MgO, where acidic refractories like fireclay and silica would be aggressively eroded. The category includes pure magnesia (MgO ≥ 90%), magnesia-carbon (MgO with 10 – 18% graphite for slag-resistance and thermal-shock performance), magnesia-chrome (MgO-Cr₂O₃ for cement burning zones), and dolomite (CaO-MgO) bricks. Service temperatures regularly exceed 1700 °C, and most basic refractories are specified by the steel, cement and non-ferrous sectors. firebrickssource.com supplies the full basic refractory range — fired and ramming variants — from Rajkot, Gujarat to industrial buyers worldwide.

Variants in stock

Grades of basic refractory bricks

$Magnesia (MgO) Refractory Bricks — firebrickssource.com$

MgO ≥ 90%

Magnesia (MgO) Bricks

Pure magnesia refractory bricks — BOF, EAF, cement burning zone back-up.

MgO ≥ 90% Max 1800 °C

$Magnesia-Carbon (MgO-C) Refractory Bricks — firebrickssource.com$

MgO-C

Magnesia-Carbon Bricks

Resin-bonded MgO + graphite — slag-line BOF, EAF hot-spot, ladle.

MgO 76 – 82% C 10 – 18%

$Magnesia-Chrome (MgO-Cr₂O₃) Refractory Bricks — firebrickssource.com$

MgO-Cr₂O₃

Magnesia-Chrome Bricks

Cement rotary kiln burning zone, copper smelting, glass regenerators.

MgO 60 – 80% Cr₂O₃ 8 – 20%

$Dolomite Refractory Bricks (CaO-MgO) — firebrickssource.com$

CaO-MgO

Dolomite Refractory Bricks

AOD/VOD vessels, cement kiln transition, ladle back-up. Stabilised grades available.

CaO 35 – 58% MgO 35 – 40%

Properties overview

Basic refractory grades compared

Basic refractory bricks — comparative properties
Grade	Primary chemistry	Max temp °C	Bulk density g/cm³	CCS MPa	Typical application
Magnesia	MgO ≥ 90%	1800	≥ 2.85	≥ 40	BOF, EAF wall, NF reverberatory
Magnesia-Carbon	MgO 76 – 82% · C 10 – 18%	1800	≥ 2.95	≥ 40	BOF slag-line, EAF hot-spot, ladle
Magnesia-Chrome	MgO 60 – 80% · Cr₂O₃ 8 – 20%	1700	≥ 3.00	≥ 45	Cement burning zone, copper smelter
Dolomite	CaO 35 – 58% · MgO 35 – 40%	1700	≥ 2.75	≥ 40	AOD/VOD, cement transition

*Typical certified values — actual batch values issued on the per-shipment test certificate. Values aligned with IS 1528 / ASTM C-series / EN 993 test methods.

Applications

Where basic refractories are used

Steel BOF / EAF

Converter linings, EAF walls and hot-spots, slag-line ladles.

Cement Burning Zone

Rotary kiln burning zone, transition zone, kiln nose ring.

Copper & Non-Ferrous

Copper smelters, anode furnaces, lead reverberatory furnaces.

Glass Regenerators

Soda-lime glass-tank regenerator checker work and ports.

Steel Ladles

AOD/VOD vessels, slag-line, ladle back-up linings.

Lime & Calcining

Lime kiln calcining zone, dolomite calciners, magnesia plants.

Datasheet

Download basic refractories datasheet

Complete property table for all four basic refractory grades — MgO/CaO chemistry, density, porosity, CCS, RUL, slag-resistance notes.

Download PDF (datasheet)

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