Product Details

Specifications

Insulating firebrick
Series: JM23,,JM25, JM26, JM28, JM30, JM32
Temperature classes: 1260, 1350, 1430, 1540, 1650, 1760

Product Description

Insulating firebrick K23/JM23 is manufactured from high-grade refractory powder and materials in good purity, compressed in vacuum and sintered under high temperature.

Product Features:

* Extremely low thermal conductivity

* Low densities

* Low heat storage

* Good stength at room and high termperatures

* Excellent resistance to alkali attack

Applications:

* Backup insulation for carbon baking furnaces

* Backup insulation in aluminum electrolytic cells

* Eletrical kilns for industrial and hobby use

* Backup insulation for blast furnace stove linings

* Lings for carbonizing furnaces

* Forge furnace linings

* Heat transfer linings

Technical Data Sheet:

		JM-20	JM-23	JM-25	JM-26	JM-28	JM-30	JM-32
Classification Temperature (^‘C)		1100	1260	1350	1430	1540	1650	1760
Bulk Density (g/cm3)		0.52	0.60	0.80	0.80	0.90	1.03	1.25
Cold Crushing Strength (Mpa)		0.8	1.2	2.0	2.0	2.6	2.8	3.4
Modulus of Rupture (Mpa)		0.6	0.9	1.2	1.5	1.6	1.7	2.0
Permanent Liner Change (%) ‘C x hrs		0	0	-0.5	-0.5	-0.8	-0.9	-0.9
Permanent Liner Change (%) ‘C x hrs		1065x24	1230x24	1350x24	1400x24	1510x24	1620x24	1730x24
Thermal Conductivity	400’C	0.17	0.17	0.24	0.24	0.30	0.40	0.49
	600’C	0.19	0.19	0.28	0.27	0.32	0.42	0.50
	800’C	0.22	0.22	0.32	0.30	0.35	0.44	0.51
	1000’C	0.24	0.25	0.37	0.32	0.38	0.45	0.53
	1200’C	--	--	--	0.35	0.39	0.47	0.55
Chemical Analysis
Al₂O₃ (%)		45	45	50	55	65	72	76
Fe₂O₃ (%)		0.9	0.9	0.8	0.8	0.5	0.4	0.3
SiO₂ (%)		50	50	45	42	32	26	22
CaO + MgO (%)		0.5	0.7	0.6	0.3	0.2	0.3	0.2
K₂O + Na₂O (%)		1.3	1.3	1.0	1.0	0.8	0.2	0.1

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