Magnesium spinel brick

Characteristics of periclase-spinel bricks

Magnesia Alumina Spinel Brick

Name of indicator	KRSH-1	KRSH-2	KRSH-3	KRSH-4
MgO, %, no less	88	86	84	82
Al2O3, %, ≥	6	9	9	8
SiO2, %, no more	0,5	0,5	0,8	1,0
Apparent density, g/cm3, no more than	2.9	2.9	2.85	2.8
Open porosity %, not more than	18	18	19	20
Compressive strength, N/mm², not less than	60	60	50	45
Refractorines under load,, 0,2 ,°С, not lower	1700	1700	1680	1650
Heat resistance, 1100 ℃ ≥ (times)	10	10	10	10
Thermal conductivity TC W / m.k	2.9	2.9	2.8	2.7

Magnesia iron spinel brick

Name of indicator	KR-MFe-85A	KR -MFe-85B	KR -MFe-85C
MgO, %	85	85	85
Al2O3, %	3-5	3-5	3-5
Fe2O3，%	4-6	4-6	4-6
SiO2, %	1.5	1.8	2
Bulk density (g/cm³)	2.95	2.93	2.9
Open porosity, %, not more than	17	17	17
Cold crushing strength (mpa) ≥	55	50	45
Fire resistance under load, (T6.0.9, )>	1600	1550	1500
Thermal shock resistance (air-cooled 950°C) (times), >	100	90	90
Thermal conductivity, W/m.K	2.6	2.6	2.4
Thermal expansion1400°C (%)	1.6	1.6	1.6

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Description of periclase-spinel bricks

Periclase spinel brick is a high temperature refractory material widely used in high temperature furnaces, reactors and heat treatment equipment. Its main component is magnesium-aluminum spinel, which has excellent resistance to high temperature, abrasion, corrosion and erosion.

Advantages of periclase-spinel bricks

Classification of periclase-spinel bricks

Classification of periclase-spinel bricks: depending on the composition and purpose, periclase-spinel bricks can be divided into periclase-aluminum-spinel bricks, periclase-iron-spinel bricks, purely magnesia spinel bricks, etc.. Different types of magnesia-spinel bricks have different refractory properties and applications.

Magnesia Alumina Spinel Brick

Periclase-alumina-spinel brick is a kind of alkali refractory product with periclase as the main phase and magnesia-alumina spinel clinker as the main material. The product has good temperature vibration, good strength and volumetric stability in high temperature environment. Magnesia alumina spinel bricks can be used in cement kiln, not only to prevent chromium contamination, but also to control flaking.

Magnesia iron spinel brick

Magnesia-iron spinel bricks are made of composite spinel and high purity magnesia with specific mineralising agents, high pressure moulding and high temperature sintering. It is a new generation of alkaline refractories with high technical content. It is mainly used in the firing belt of large dry process cement kilns.

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Application of periclase-spinel bricks

Metallurgical industrial furnace

Periclase spinel brick is widely used in metallurgical furnaces, including steel furnaces, blast furnaces, quenching furnaces, tempering furnaces, tempering furnaces, other high-temperature treatment devices, etc.

Waste incineration plants

Waste incineration requires refractory materials that can withstand high temperatures and resist the chemical attack of the waste. The properties of periclase-spinel bricks make them ideal for use as cladding materials in waste incineration plants, providing long-term stability, efficient combustion and retention of harmful substances.

Glass firing furnace

Glass is widely used in the glass industry as a refractory material. In glass production, firing furnaces are often exposed to high temperatures and chemical attack. Periclase spinel bricks have excellent resistance to high temperatures and chemical attack and are able to withstand high temperature corrosion and thermal cycling during the glass production process, maintaining the stability of the kiln.

Rotary kiln for cement kiln

The application of periclase spinel brick in rotary cement kiln is mainly used as the facing material of kiln body, which is used to protect the kiln body from high-temperature ablation and chemical corrosion, and to reduce the heat loss and energy consumption of kiln body.

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