Fire Resistant Steel Cord Conveyor Belt for Coal Mine

Item

Index

Tensile Strength/Mpa≥

15

Breaking Elongation/%≥

350

Abrasion Loss/mm3≤

200

After aging test(70℃×168h)

Change rate of tensile strength/%

±25

Change rate of breaking elongation/%

±25

Belt type

630

800

1000

1250

1600

2000

2500

2800

3150

3500

4000

4500

5000

5400

Before- aging, ≥

60

70

80

95

105

105

130

135

140

145

150

165

175

180

After- aging, ≥

55

65

75

90

95

95

120

125

130

140

145

160

170

175

Belt type

ST630

ST800

ST1000

ST1250

ST1600

ST2000

ST2500

ST2800

ST3150

ST3500

ST4000

ST4500

ST5000

ST5400

630

800

1000

1250

1600

2000

2500

2800

3150

3500

4000

4500

5000

5400

Steel cord pitch(mm) (±1.5)

15

Top cover thickness (mm)

Bottom cover thickness (mm)

Belt width

Number of steel cord

800

75

75

63

63

63

63

50

50

50

50

50

46

46

43

1000

95

95

79

79

79

79

64

64

64

64

64

59

59

55

1200

113

113

94

94

94

94

76

76

76

76

76

71

71

66

1400

133

133

111

111

111

111

89

89

89

89

89

84

84

78

1600

151

151

126

126

126

126

101

101

101

101

101

96

96

90

1800

171

171

143

143

143

143

114

114

114

114

114

109

109

102

2000

191

191

159

159

159

159

128

128

128

128

128

121

121

113

2200

211

211

176

176

176

176

141

141

141

141

141

134

134

125

Item

Fire resistant properties

Alcohol burner test

Averagevalue of flame duration of 6 samples with covers, not more than 3s, any single value not more than 10s.

Averagevalue of flame duration of 9samples withoutcovers, not more than 5s, any single value not more than 15s.

Anti-statictest

Surface resistance≤ 3×108Ω

Drum friction test

no flame reappear, ≤325℃

Tunnel propane burning test