Brasion-resistant castables

      The castables have such features as easy installation, good early, middle and high temperature strengths, being able to be demolded after natural curing for 1624h after placement, strength increasing with temperature rising and good resistance to high velocity as flow erosion and dust attack.



产品规格



An in-construction CFB boiler for which abrasion resistant castables are used


Properties specification of abrasion-resistant castables for CFB boiler

   Type

NM-1

(Steel fiber wear-resistant castable)

NM-2

(High aluminum wear-resistant castable)

NM-3

(wear-resistant and thermal shock-resistant castable)

Chemical analysis

(%)

Al2O3     ≥

85

80

65

SiO2      ≤

11

18

20

Bulk density(g/cm3)

110℃×24h≥

2.80

2.70

2.50

1100℃×3h≥

2.70

2.60

2.45

Permanent change(%)

1100℃×3h

-0.3~0

-0.3~0

-0.5~+0.5

Modulus of rupture Mpa

110℃×24h≥

15

10

8

1100℃×3h≥

20

20

12

Compressive strength Mpa

110℃×24h≥

90

90

60

1100℃×3h≥

110

110

80

Thermal shock stability,time

1100℃,水冷≥

25

20

30

Wear resistance index, CC

ASTM C-704

≤6

≤8

Service temperature,℃     ≥

1600

1600

1500

Use area

 

Separator straight section, inlet, outlet, cone section, material leg, return device

Dense phase area and transition area of ​​combustion chamber, elbow at the bottom of water cooling screen, turning room at cyclone outlet, tail shaft

 

Ignition air duct, water-cooled air chamber

 


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