Magnesia Dolomite Brick
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Magnesia Dolomite Brick

Magnesia Dolomite Bricks are alkaline refractory products with high magnesium oxide content. The CaO/MgO mass ratio of magnesia dolomite is less than 1.39, and its production process is similar to that of making dolomite bricks. Mainly used in steelmaking furnaces, iron furnaces and cement kilns.
MOQ<5TONS
MOQ：5 tons

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Product Introduction

Products Description

Magnesia dolomite brick is made of high-purity and dense magnesia and sintered magnesia dolomite sand or dolomite sand as raw materials. According to different use environments, select the appropriate ratio of MgO and CaO, use anhydrous binder, and form at a suitable temperature. , High temperature firing.

Magnesia calcium brick has strong resistance to low iron and low alkalinity refining slag outside the furnace, and are beneficial to desulfurization and dephosphorization to remove impurities in steel, and have the effect of purifying molten steel. Used in cement kilns, magnesium dolomite bricks have a great affinity with cement clinker, are easy to hang on the kiln, and have uniform thickness.

Products category

Dolomite refractory materials can be divided into two categories:

(1) Dolomite refractory materials containing free lime are also called unstable or non-water-resistant dolomite refractory materials because their composition contains active CaO that is difficult to sinter and easily absorbs moisture and pulverizes.

(2) Dolomite refractory material without free CaO, its mineral composition is MgO, C3S, C2S, CAF, C2F (or CA). All CaO in the composition is in a combined state and will not be powdered due to hydration, so it is also called stable or water-resistant dolomite refractory material. Stable magnesia dolomite bricks fall into this category. This product can be used to build open hearth furnace walls and furnace bottoms, rotary kilns and shaft kiln firing belts, etc., but is rarely produced at present.

Magnesia-dolomite brick

Products Feature

Optimized Thermal Conductivity: Magnesia Dolomite Brick excels in efficiently conducting and dissipating heat, making it an ideal choice for applications such as steel converters and kilns.
Mechanical Robustness: The brick's composition grants it superior mechanical strength, ensuring durability in environments characterized by high stress and thermal fluctuations.
Thermal Shock Resistance: Magnesia calcium Brick's unique blend provides exceptional resistance to thermal shock, vital for applications subject to rapid temperature changes.
Versatile Applicability: Its adaptability makes it suitable for a diverse range of applications, from steelmaking to glass manufacturing.

Products Application

Magnesia dolomite brick is suitable for stainless steel refining furnaces. For example, the strip of refining equipment outside the furnace is used as an alternative product for magnesia-chrome bricks. Its application range is becoming more and more stripped as an alternative product for magnesia-chrome bricks, and its application range is also more and more extensive. Used for masonry of AOD furnace, VOD furnace and ladle.

application

Physical and chemical indicators

Brand / Properties		JMD15	JMD20	JMD25	JMD30	JMD40
Bulk Density (g/cm3)		3.03	3.03	3.03	3.03	3
Apparent Porosity (%)		13	12	12	13	13
Cold Crushing Strength (MPa)		80	90	80	80	80
Permanent Linear Change (%)@ 1,500℃ x 2hrs		--	-0.35	--	-0.61	--
Refractoriness Under Load (℃) @0.2MPa		1700	1700	1700	1700	1700
Chemical Composition (%)	MgO	80.3	76.3	70.3	66.3	56.3
	CaO	17	21	27	31	41
	Al2O3	0.5	0.5	0.5	0.5	0.5
	Fe2O3	0.7	0.7	0.7	0.7	0.7
	SiO2	1.3	1.3	1.3	1.3	1.2

Products productive process

Magnesia dolomite brick production process involves a careful blending of magnesia and dolomite, shaping the mixture into the desired form, and subjecting it to controlled firing.

1.Raw material quality control including physical and chemical testing.
2.Crushing and grinding of bulk raw materials.
3. According to customer data sheet required to mixing Raw Material.
Pressing or shaping the green brick depend on different raw material and brick shape.
4.Dry the bricks at dryer kiln.
5.Put the bricks into the tunnel kiln to burning by higher temp from 1300-1800 deg.
6.The quality control department will inspect the finished refractory bricks random.

magnesia dolomite brick

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