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Refractory Precast Blocks

Refractory precast blocks (also called prefabricated refractory blocks, precast shaped refractory, precast fired refractory), according to customer requests, the refractory precast blocks are mainly designed and made of the refractory castable and refractory plastic mixture.

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Introduction of Refractory Precast Blocks

Also together with aluminate cement, water glass refractory cement, phosphate refractory cement and aluminum phosphate refractory cement, fire clay, and low cement bonded precast blocks; According to the variety of aggregate into high alumina refractory cement, clay, silica refractory cement, and corundum refractory cement block; According to the forming method, it can be divided into the vibration forming precast blocks, the vibration compression molding precast blocks and the ramming forming precast blocks.

The mass of the precast blocks is several tens of kilograms to several tons, so it is divided into large, medium, and small prefabricated blocks, So refractory precast blocks can be divided into ordinary precast blocks, steel precast blocks, and anchor block.

Properties of Refractory Precast Blocks

Our company can produce exactly according to your requirements and drawing, we have enough experience in the field of manufacturing and application of refractory precast shapes.

Our company also has the ability to supply burner rings, tap-out blocks, seal blocks, bull noses, and many other precast items in a myriad of configurations. The advantages of our refractory precast block are as follows,

1. Perfect molding to size

2. High density, low porosity & high strength

3. First heating up is shortened or even unnecessary

4. Quick and easy installation even with unskilled persons

Characteristics of Refractory Precast Blocks

Refractory precast blocks can achieve direct lifting, mechanized furnace construction, and high construction efficiency. It can solve the technical problems in the furnace construction for the user and can customize the lining and various construction schemes according to the user's requirements and furnace type conditions. In the industrial furnace and thermal equipment, the use of prefabricated block furnaces, can realize the mechanization of hoisting, saving manpower, shorten the construction period, and improve the furnace operation rate.

Applications of Refractory Precast Blocks

Refractory precast blocks are most commonly used in high-temperature furnace equipment. According to the needs of the construction site, per the designs, the refractory product was produced in advance by the manufacturer to facilitate your construction. The refractory precast block is widely used in various industrial furnaces because of its irreplaceable advantages. Its biggest advantage is that it can be pre-baked, and directly hoisted, the construction period is greatly reduced, and the quality is stable and controlled.

In recent years, the proportion of refractory precast blocks has become higher and higher. It divides the parts to be constructed of a high-temperature kiln into small pieces in advance and designs them into special shapes. The molds are made according to the shape, and the refractory precast blocks are prefabricated and formed in the factory. After being cured and baked, they are transported to the site and suspended. It can be used after hanging up.

Part Shapes of Refractory Precast Blocks

Pre-Fired Refractory Cast Shapes

Burner Blocks

Trough Liners

Ladle Liners (Drop-In)

Tap Hole Blocks

Pier Blocks

Induction Furnace Shapes

Furnace Jambs, Arches, Roofs, Walls & Hearths

Headwall Castings

Lintels/Jambs/Sills

Special Shapes

Packing of Refractory Precast Blocks

Wooden Pallet

Per your required

Physical Parameters

Item / Model		XHJAPB95	XHJAMB95	XHJAMB90	XHJAMB80
Chemical composition (%)	Al₂O₃ ≥	95	-	-	-
	Al₂O₃ +MgO≥	-	94	90	80
	SiC ≤	-	-	-	10
Bulk density(g/cm3)≥		2.95	2.9	2.75	2.7
Room temperature compressive strength(MPa)≥		80	80	40	40
Room temperature bending strength(Mpa)≥		10	7	7	6
Linear change rate(%)1500ºC×3h		±0.5	±0.5	--	±1.0
Application		Different kinds of ladle Seating Block for Purging Plugs and Nozzle		Small ladle Seating Block for Purging Plugs and Nozzle

Precast Burner Blocks

Properties		XHJAPB50	XHJAPB65	XHJAPB75	XHJAPB90	XHJAPB91
Chemical Composition (%)	Al₂O₃	50	65	75	85	91
	SiO₂	20	30	8	5	1
	MgO	-	-	-	2	3
	Cr₂O₃	-	-	-	-	3
	SiC+C	5	12	10	3	1
Bulk Density (g/cm3)		2.4	2.5	2.9	2.95	3
Cold Crushing Strength (MPa)		35	40	25	70	70
Permanent Linear Change @1,500ºC x 2H (%)		-0.3	0.5	0.7	0.2	-