Low porosity clay brick seven inch head

Low porosity clay brick is made of three kinds of raw materials: clay material, dead burning combined clay and white scorched gem.

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Low porosity clay brick

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Low-porosity clay brick is made of three raw materials: clay material, dead-burned bonded clay and white scorched gem, which are respectively broken into 5-3mm,3-1mm, and ≤ 0.088mm. Six kinds of clay materials are mixed into particles with other 6 kinds of additives. After binder, fine powder and uniformity, the brick blank is pressed with standard brick on 260T friction brick for 6-8 times and dried in a drying kiln at 110°C for 16h, when the moisture content of the brick is less than 1%, it is fired in a tunnel kiln.

Project			Indicators
			DN-11		DN-14	DN-17
Al_²O₃ %		μ0	≥47		≥ 45	≥ 42
		.	1.0		1.0	1.0
Fe₂O₃ %		μ0	≤1.2		≤1.5	≤ 1.8
		.	0.2		0.2	0.2
Bulk density g/cm³		μ0	≥ 2.40		≥ 2.34	≥ 2.26
		.	0.02		0.02	0.02
Percent porosity%		μ0	≤ 11		≤ 14	≤ 17
		.	1.0		1.0	1.0
Normal temperature compressive strength MPa		μ0	≥80		≥ 65	≥50
		.	10		10	10
load softening temperature (0.2MPa,T0.6)℃		μ0	≥ 1520		≥ 1470	≥ 1430
		.	10		10	10
Heating permanent line change (1400 × 2h)%		L～U			0.1～-0.2	0.1～-0.2
		.			0.02	0.02
Heating permanent line change (1500 × 2h)%		L～U	0.1～-0.2
		.	0.02
Thermal shock stability (1100 ℃, water cooling)			≥ 7 times		≥ 7 times	≥ 7 times
Dimensional deviation and appearance quality
Project				Indicators
Dimensional deviation	Size: ≤ 230mm			±1mm
	Size:>230mm			±1.5mm
	Wedge brick size head			≤ 1mm
Distortion	Diagonal: ≤ 350mm			≤ 1.5mm
	Diagonal:>350mm			≤2mm
missing angle	a b c≤ 20mm			Permitted
	20mm			Allow two places
	a b c≥50mm			Not allowed
Lack of edge	E F g≤30 mm			Permitted
	30mm			Allow three places
	E F g≥60 mm			Not allowed
Molten hole diameter				≤ 6mm
crack length	Crack width: ≤ 0.25mm			No restrictions
	Crack width: 0.26~0.5mm			≤ 20mm, no more than two
	Crack width:>0.5mm			Not allowed
section spalling				Not allowed
Note: the barrel type lattice brick is classified according to the height deviation: The height deviation is within the range of (-1.5 ~-0.5mm) at the position; The height deviation is in the range of (-0.5~0.5mm) at "0; The height deviation within the range of (0.5~1.5mm) is classified; Checked bricks with height deviation exceeding (± 1.5mm) are nonconforming products. The lattice bricks with different height deviation shall be packed in boxes and marked on the packing box.

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Low porosity clay brick seven inch head

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Zhengzhou Aoda Refractories Co., Ltd. mainly produces refractory materials for metallurgy, building materials, nonferrous metals, petrochemical and general industrial furnaces.