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Specifications of refractory for cement kiln

Refractory for cement kiln developed by CHINA WEIHUA has such advantages as alkaliproof, antipeeling, abrasion-resistance and long service life, which can be used as burnt belt, intermediate belt and the mouth of unloading for cement rotary kiln.

Variety	Direct-bonded Mg-Chrome brick	Magnesite Alumina spinel brick	Common Mg- Chrome brick	phosphorus, acid, sodium combine Mg brick		water glass combine Mg brick	high- alumina brick resist peel off
	SN-MC-75	SN-MA-75	SN-MC-70	SN-PA-80	SN-PA-70	SN-MS-80	SN-KB-70
chemical MgO	≥75	≥78	71	≥80	≥70	≥85
CompositionC r2O3	≥7	－	12	－	8	－
％ AL2O3		≥13	5	≤1	4-8	≤6	≥70
ZrO2
volume density g/cm3	≥2.95	≥2.92	2.85-2.97	2.85	2.90	2.80	≥2.4
apperent porosity ％	≤18	≤19	19.3-21.5	17-19	17-19	17-20	≤20
cold crushing strength MPa	≥40	≥40	25-40	≥60	≥50	≥60	≥40
Softening temperature under load ℃	≥1620	≥1650	≥1570	≥1550	≥1550	≥1440	≥1600
coefficient of linear- expansion (1000℃)％	1.03	0.96	0.91	1.2	1.2	1.2
Thermal resistance （1000℃- water） times	≥8	≥10	4-6	≥4	≥5	≥4	10
used				medium, small sized kiln		medium, small sized kiln

Variety	Zr dolomite brick	Zr-Mg dolomite brick	Mg-Al brick	Mg-Al brick	Zr,Mg,Al brick	Mg,Ca,Zr brick
	SN-MZ-35	SN-MZ-45	SN-MA-85	SN-MA-90	SN-MC-80	SN-MZA-85
Chemical MgO	37.0	48.0	85-89	89-93	82.3	87.5
Analysis CaO	58.0	48.0	≈1.0	≈2.0	5.8	0.7
％ ZrO2	2.7	1.8			11.3	1.0
volume density g/cm3	2.83	2.90	2.85-2.95	2.85-3.0	3.09	3.0
apperent porosity％	16	15	16-18	16-18	15.8	14.9
cold crushing strengthMPa	45	50	45	50	46	51
softening temperature under load ℃	＞1700	＞1700	＞1700	＞1700	heat bending-resistant 1400℃ 3.6MPa	Heat bending-resistant 1500℃ 3.6MPa
950℃-air cold and hot(times)	＞30	＞30	100	100	－	－

Type of castable	high and strong	steel fibre strengthen		low cement	normal		Alkali proof
Castable used	ZSN-90	ZSN-80	ZSN-70	ZSND-70	ZSND-65	ZSND-45	ZSND-45
Chemical analysis ％AL2O3	≥93	≥87	≥74	75-78	≥70	≥45	≤40
CaO	≤5.5			1.5-2.0			≤9
SiO2	≤0.5	≤2	≤12	12-15			≥ 55
Volume density g/cm3
110℃	≥2.88	2.89-2.96	2.50-2.62	≥2.70	2.60	2.20	2.0
1100℃	≥2.70	2.80-2.88	2.42-2.51	≥2.7
Crushing strengthMPa
110℃	≥80	70-100	70-100	100	≥40	≥40	≥40
1100℃	≥80	40-60	40-50	110	≥25	≥25	≥2.5
					(1000℃)	(1000℃)	(1000℃)
flexural-resistance strength MPa
110℃	≥8			14.3			≥5
1100℃	≥8	9-12	9-12	15.7	0.50	0.40	≥2.5
cofficent of linear-expansion(1100℃) 0.8	0.8	0.72-0.77	0.60-0.66				(1000℃)0.40
Thermal resistance1	≥15			≥15