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GB/T 18856.2-2008: Test methods for coal water mixture -- Part 2: Determination of mass percentage of solid
Status: Valid GB/T 18856.2: Evolution and historical versions
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| GB/T 18856.2-2008 | English | 149 |
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Test methods for coal water mixture -- Part 2: Determination of mass percentage of solid
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GB/T 18856.2-2008
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| GB/T 18856.2-2002 | English | 199 |
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Test methods for quality of coal water mixture -- Part 2: Determination of the solid load of coal water mixture
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GB/T 18856.2-2002
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Basic data | Standard ID | GB/T 18856.2-2008 (GB/T18856.2-2008) | | Description (Translated English) | Test methods for coal water mixture -- Part 2: Determination of mass percentage of solid | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D21 | | Classification of International Standard | 75.160 | | Word Count Estimation | 5,585 | | Date of Issue | 2008-07-29 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 18856.2-2002 | | Quoted Standard | GB/T 18856.1 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.12 (Total No.125) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the CWS concentration measurement instruments and equipment, measuring step, results of calculation and precision of the method. This section applies to a variety of CWS. | GB/T 18856.2-2008: Test methods for coal water mixture -- Part 2: Determination of mass percentage of solid
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Test methods for coal water mixture Part 2. Determination of mass percentage of solid
ICS 75.160
D21
National Standards of People's Republic of China
Replacing GB/T 18856.2-2002
CWS Test Method
Part 2. Determination of concentration
Posted 2008-07-29
2009-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revision of GB/T 18856 "CWS Test Method" is divided into seven sections.
--- Part 1. Sampling;
--- Part 2. Determination of the concentration;
--- Part 3. screening tests;
--- Part 4. Determination of apparent viscosity;
--- Part 5. Determination of stability;
--- Part 6. Determination of density;
Part --- Article 7. pH value measurement.
This standard replaces GB/T 18856-2002 "Test methods for quality of coal water."
This standard compared with GB/T 18856-2002, the main differences are as follows.
--- Deleted - Part 6. Determination of calorific value coal water slurry;
--- Deleted Part 7. CWS industry analysis;
--- Deleted Part 8. Determination of total sulfur in coal water slurry;
--- Deleted Part 10. Determination of the ash fusion CWS;
--- Deleted Part 11. Determination of Hydrocarbon CWS;
--- Deleted Part 12. CWS nitrogen determination method;
--- Deleted Part 13. CWS ash component measurement method.
Delete the contents were integrated into the standard measurement method related to coal and coal ash.
This section edition GB/T 18856 Part 2.
This Part replaces GB/T 18856.2-2002 "quality of coal water mixture - Part 2. Test methods Determination of Concentration."
This portion of the GB/T 18856.2-2002 compared to major amended as follows.
--- Increasing the test report a chapter (Chapter 6 edition).
This part is proposed by the China Coal Industry Association.
This part of the National Standardization Technical Committee centralized coal.
This section drafted by. National CWS Engineering Technology Research Center, Shandong August prairie CWS limited liability company, Zaozhuang Mining (set
Group) Co., Ltd., National Coal Quality Supervision and Inspection Center.
The main drafters of this part. He Guofeng, the Kingdom of the room, Jiazhuan Kai, Duan Qing, Wang Chengjie, Jiang Wei, Zhang Bo, Wang Mingnan, Shi Yuying.
This part of the standard replaces the previous editions are.
--- GB/T 18856.2-2002.
CWS Test Method
Part 2. Determination of concentration
1 Scope
GB/T 18856 provisions of this part of the coal-water slurry concentration measuring equipment, measurement procedure, the results of calculation and precision of the method.
This section applies to a variety of CWS.
2 Normative references
The following documents contain provisions which, through reference GB/T 18856 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 18856.1 CWS Test methods - Part 1. Sampling
3 samples taken and prepared
CWS and take samples prepared according to GB/T 18856.1 performed.
4 Method A --- oven drying method (Arbitration Act)
4.1 Method summary
Weigh a certain amount of coal-water slurry samples at 105 ℃ ~ 110 ℃ under dried to a constant quality, the quality of the sample after drying as it accounted for the quality
As the mass fraction of Concentration.
4.2 Equipment
4.2.1 Oven. with automatic temperature control unit and a blower, and can keep the temperature of 105 ℃ ~ 110 ℃.
4.2.2 weighing bottle. diameter 50mm, height 30mm, with a tight grinding mouth cover.
4.2.3 Analytical Balance. a sense of the amount of 0.0001g.
4.2.4 dryers. built-in granular silica gel or anhydrous calcium chloride.
4.3 Determination of step
4.3.1 Take stir CWS samples (3.0 ± 0.2) g placed in a pre dried and weighed (weighing accuracy of 0.0002g) had weighed
Bottle, quickly stamped, weighing (weighing accuracy of 0.0002g), shaking smoothing.
4.3.2 open the bottle, the weighing bottle and cap into the pre-heated oven blast and has 105 ℃ ~ 110 ℃, the conditions in the blast
By drying 1h.
4.3.3 weighing bottle was removed from the oven, immediately capped cooling in air after about 3min desiccator, cool to room temperature (about
20min), weighing.
4.3.4 inspection of dry, every 30min, until two consecutive quality dried samples of no more than 0.003g reduce or increase the quality of
Add up. In the latter case, it should be used to increase the quality once before as calculated on the basis of quality.
4.4 Calculation Results
CWS concentration according to equation (1).
C = 0 × m1 m1
100 (1)
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