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Fig.17 Laterite

Fig.18 No label 01

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Fig.19 No label 02

Fig.20 No label 03

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4. The analysis of the coal

The report of the coal quality:

(This report is only for the samples)

From: SAGAMU Date: 2008/10/23

 Name Mad/% Aad/% Vad/% FCad/% Property St,ad

 No label 01  20.14 4.91 35.40 39.55 2# 0.6

 No label 02  19.13 5.21 36.47 39.19 2# 0.6

 No label 03 11.95 5.76 39.43 42.86 2# 0.6

COAL  19.10 6.29 34.85 39.76 2# 0.5

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The report of the coal quality

(This report is only for the samples) 

4.1 The comb us ti bi li ty test of the coalThe TGA result show that, in the condition of volume percent of oxygen is

16.7% (the flowrate of oxygen is 16ml/min, the flowrate of nitrogen is

80ml/min), the TGA result is in Table 1&2.

Table 1 The parameter of the heat weight-loss of the coal

 Names of the

samples

Starting

temperature

（℃） 

Percentage

when begin

Ending

temperature

（℃） 

Percentage

when end

The percent of the

residue on

80μm

 No label 01 327.23 71.65% 493.10 8.76% 8.18%

 No label 02 335.09 75.56% 500.88 8.90% 4.80%

 No label 03 334.70 74.69% 496.53 10.91% 4.51%

COAL 328.23 71.16% 477.54 13.66% 5.81%

Table 2 The parameter of the DSC

 Names of the samples  be on fire temperature

（℃） 

exothermic peak value

temperature（℃） 

enthalpy of coal

（J/g） 

 No label 01 256.26 429.63 15044

 No label 02 253.92 441.62 16522

 No label 03 252.91 445.25 15390

COAL 259.27 399.25 15038

4.2 The conclusions of the burning of the coal samples

According to the green TGA (thermo-gravimetric analysis) line and the blue

DSC (Differential Scanning Calorimetry) line in the DSC-TGA plot of COAL,

the TGA line is not sleek as other coal. There is a little peak value before the

exothermic peak value. Maybe the coal is polluted by other combustibles..

According to the blue DSC line in the DSC-TGA plot, the start temperature of

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volatilization is about 88℃, it is dangerous to process the coal, e.g. storage and

mill, with high explosion risk. Moreover the low fixed carbon, high volatile and

low LHV of the coal, it’s not acceptable for clinker burning.