High temperature tunnel kiln (firing temperature
≥1800Celsius)
Process description: The following process is
adopted for brickmaking. The high quality sintered magnesite produced
by the kiln of the company, chrome concentrate and calcined bauxite
are used as raw materials. The concentrate proportion, high temperature
firing are adopted to produce various brands basic refractories.
Magnesia Brick
|
Item
|
Spec
|
|
MZ-91
|
MZ-89
|
MZ-87
|
MGZ-82
|
|
MgO, % Min
|
91
|
90
|
87
|
82
|
|
SiO2, %
|
-
|
-
|
-
|
5-10
|
|
CaO, % Max
|
3
|
3
|
3
|
2.5
|
|
Refractoriness under load at 0.2 MPa Min
|
1550
|
1550
|
1520
|
1550
|
|
Apparent Porosity, % Max
|
18
|
20
|
20
|
20
|
|
Cold Crushing strength MPa Min
|
58.5
|
49
|
39.2
|
39.2
|
|
Reheating Liner Charge Max
|
0.5
|
0.6
|
-
|
-
|
High Grade Magnesia
Brick
|
|
|
|
MZ-95
|
MZ-96
|
MZ-97
|
MZ-98
|
|
MgO, % Min
|
94.5
|
95.5
|
96.5
|
97.5
|
|
Refractoriness under load at 0.2 MPa Min
|
1620
|
1650
|
1680
|
1700
|
|
Apparent Porosity, % Max
|
20
|
20
|
18
|
18
|
|
Cold Crushing strength MPa Min
|
39.2
|
39.2
|
39.2
|
44.1
|
Magnesia-Chrome Brick
|
Item
|
Spec
|
|
MGr-20
|
MGr-16
|
MGr-12
|
MGr-8
|
|
MgO,% Min
|
40
|
45
|
55
|
60
|
|
Cr2O3,% Min
|
20
|
16
|
12
|
8
|
|
Refractoriness under load at 0.2 MPa Min
|
1550
|
1550
|
1550
|
1530
|
|
Apparent Porosity, % Max
|
23
|
23
|
23
|
24
|
|
Cold Crushing strength MPa Min
|
24.5
|
24.5
|
24.5
|
24.5
|
High Quality Magnesia-Chrome
Brick
|
Item
|
Spec
|
|
Rebonded
|
Semi-rebonded
|
Direct-bonded
|
Fullsynthetic
|
Prtomed reaction
|
|
MgO, % Min
|
60
|
60
|
75
|
65
|
75
|
|
Cr2O3, % Min
|
20
|
16
|
10
|
10
|
6
|
|
SiO2, %
|
1.0
|
2.0
|
2.0
|
1.5
|
2.0
|
|
Refractoriness under load at 0.2 MPa Min
|
1680
|
1650
|
1650
|
1670
|
1650
|
|
Apparent Porosity, % Max
|
15
|
17
|
18
|
16
|
17
|
|
Cold Crushing strength MPa Min
|
45
|
40
|
40
|
40
|
35
|
|
break down MPa Min
|
8
|
8
|
8
|
10
|
12
|
Medium grade MgO-Al2O3-Cr2O3
bricks taking medium grade sintered magnesite, super grade calcined
bauxite (or MgO-Al2O3 spinal) and chrome concentrate
as raw material, meticulous proportion, high pressure moulding,
high temperature firing etc. The bricks are widely used for the
arch brick laying because of good thermal shock resistance, slag
resistance and better high temperature performance.
Medium Grade Magnesia-Alumina-Chrome
Brick
|
Item
|
Spec
|
|
MgO, % Min
|
84
|
|
Al2O3+Cr2O3,
% Min
|
6-8
|
|
Apparent Porosity, % Max
|
17
|
|
Cold Crushing strength MPa Min
|
45
|
|
Refractoriness under load at 0.2 MPa Min
|
1630
|
|
Thermal-Shock resistance
|
4
|
Address: Pailou Town, Haicheng City, Liaoning
Province, China.
Postcode: 114207
Tel: +86 412 6103901
Fax: +86 412 3779797
E-mail: sales@chinarefractories.com
Copyright (C) 1999-2016, China Haicheng City Rongli Magnesia Co.,Ltd.
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