GB/T 2001-2013 English PDF (GBT2001-2013)

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GB/T 2001-2013: Coke -- Determination of proximate analysis
GB/T 2001-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 75.160.10
H 32
Replacing GB/T 2001-1991
Coke - Determination of proximate analysis
ISSUED ON. DECEMBER 17, 2013
IMPLEMENTED ON. MAY 1, 2014
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Determination of moisture ... 5 
4 Determination of ash content ... 8 
5 Determination of coke volatilization content ... 13 
6 Calculation of coke’s fixed carbon ... 17 
7 Determination method of automatic industrial analyzer ... 17 
8 Test report ... 18 
Appendix A ... 19 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 2001-1991 “Coke - Determination of proximate
analysis”. Comparing with GB/T 2001-1991, the main changes are as follows.
- Add “Foreword”;
- Modify the standard format; adjust the structure;
- Appropriately modify the terms and definitions in this Standard;
- Delete GB/T 9977 “The terms of coking products” and YB/T 5155
“General rule for determination of coke and coal chemicals” from
“Normative references”;
- Add “Place in the pre-blast drying oven” in 3.2 “Principle”;
- Add “For heat-resistant, corrosion-resistant materials, its specification
shall be able to accommodate 500 g of sample; load of per unit area shall
not exceed 1g/cm2; the depth of tray is about 20 mm” in 3.4.2 “Tray”;
- In 3.4 “Apparatus”, modify the sensitivity of industrial scale used in the
test to 0.1 g; in 3.6.1 “Determination step of total moisture”, modify sample
weight to (500±10) g, and make it accurate to 0.1 g;
- In 3.6.2 “Determination of air dried moisture”, add “Pre-blast” and “Drying
under the conditions of the blasting” in test steps;
- In 3.6.2.1, 4.6.1.1, and 4.6.2.1, make weighing accuracy from 0.0002 g to
0.0001 g;
- Modify “Weighing it to” to “Making it accurate to” in the standard;
- Respectively add “Note” in 3.6.2.2, 4.4.2 and 5.5.2;
- Add “Calibrate thermocouple at least once a year” in 4.4.1 and 5.3.2;
- Add 4.4.6 “Heat-resistant porcelain or asbestos slate”;
- In 4.6.1.1, add “Nicely pave it in the cupel, so as to make the mass per
cm2 not exceed 0.10 g”;
- In 5.3.1, add “Volatilization content crucible must closely coordinate with
crucible cover. The selection of crucible cover must make vertical
clearance between the cover and the crucible not greater than 0.5 mm.
Coke - Determination of proximate analysis
Warning. Use of this Standard may involve operations and equipment of
hazardous materials. However, there is no recommendation concerning
the safety. Before using this Standard, the user shall have responsibility
to take appropriate safety and protective measures to ensure the use to
comply with relevant national regulations.
1 Scope
This Standard specifies the determination methods of coke’s total moisture, air
dried basis moisture, ash content and volatilization content as well as
calculation method of fixed carbon.
This Standard is applicable to the determination of coke’s total moisture, air
dried basis moisture, ash content and volatilization content as well as
calculation of fixed carbon.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 1997 Coke - Sampling and preparation of samples
3 Determination of moisture
3.1 General rule
This Clause specifies the determination method of coke’s total moisture and air
dried basis moisture.
3.2 Principle
Weigh a certain mass of coke sample; place in the pre-blast drying oven. At a
certain temperature, dry it to constant mass. Calculate moisture’s mass score
by mass loss of coke sample.
3.3 Reagents
3.6.1.1 Use dry and clean tray (see 3.4.2) of known mass to weigh (500±10) g
of coke sample, of which the granularity is less than 13 mm, accurate to 0.1 g;
make it paved in the tray.
3.6.1.2 Put the tray that holds sample into the pre-blasted drying oven that has
been previously heated to 170°C ~ 180°C. Dry it for 1 h under the conditions of
the blasting.
3.6.1.3 Take the tray out; cool it for 5 min; weigh it, accurate to 0.1 g.
3.6.1.4 Conduct inspection drying, 10 min for each time till the sample mass
difference between 2 consecutive times does not exceed 1 g or till the mass
increases. When calculating, take the last mass. If the mass increases, take the
mass before it increases as the calculation basis.
3.6.2 Determination of air dried moisture
3.6.2.1 In the pre-dried and weighed weighing bottle, weigh 1g±0.5g of
analytical sample of which the granularity is less than 0.2 mm, accurate to
0.0001 g; pave in the weighing bottle.
3.6.2.2 Remove the cover of the weighing bottle that holds sample into the pre-
blasted drying oven that has been previously heated to 105°C ~ 110°C. Dry it
for 1 h under the conditions of the blasting.
Note. Pre-blasting is to make the temperature inside the drying oven to be even. Pre-
blasting shall be conducted 3 min ~ 5 min before the weighing bottle that holds sample
is put into the drying oven.
3.6.2.3 Take the weighing bottle out from the drying oven. Cover it immediately.
Put it into the dryer. Weigh it after it is cooled to room temperature (about 20
min).
3.6.2.4 Conduct inspection drying, 15 min for each time till the sample mass
difference between 2 consecutive times does not exceed 0.001 g or till the mass
increases. When calculating, take the last mass. If the mass increases, take the
mass before it increases as the calculation basis.
3.7 Calculation of results
3.7.1 Calculate the total moisture, according to equation (1).
Where,
4.4.5 Analytical balance. sensitivity is 0.0001 g.
4.4.6 Heat-resistant porcelain or asbestos slate.
4.5 Sample’s sampling and preparation
Sample’s sampling and preparation shall be conducted according to the
provisions in GB/T 1997.
4.6 Test steps
4.6.1 Method 1 (arbitration method)
4.6.1.1 In the cupel that has been pre-burnt to constant mass, weigh (1±0.05)
g of coke sample of which the granularity is less than 0.2 mm and has been
evenly stirred, accurate to 0.0001 g; nicely pave it in the cupel, so as to make
the mass per cm2 not exceeding 0.10 g.
4.6.1.2 Place the cupel that holds sample at the door of muffle furnace of which
the temperature is 815°C±10°C. Gradually push it into the constant temperature
zone of furnace in 10 min. Close furnace door. When leaving a 15 mm gap,
open the small ventilation hole in the furnace door and the chimney behind the
furnace. Burn it at 815°C±10°C for 1 h.
4.6.1.3 Use cupel clamp or crucible clamp to take the cupel out of the furnace.
Place it on heat-resistant porcelain or asbestos slate. Cool it in the air for about
5 min. Put the cupel into the dryer and cool it to room temperature (about 20
min). Weigh it.
4.6.1.4 Conduct inspection burning at 815°C±10°C, 15 min for each time till the
sample mass difference between 2 consecutive times does not exceed 0.001 g
or till the mass increases. When calculating, take the last mass. If the mass
increases, take the mass before it increases as calculation basis.
4.6.2 ...