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GB/T 18856.5-2008: Test methods for coal water mixture -- Part 5: Determination of the stability
Status: Valid GB/T 18856.5: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 18856.5-2008 | English | 169 |
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Test methods for coal water mixture -- Part 5: Determination of the stability
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GB/T 18856.5-2008
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| GB/T 18856.5-2002 | English | 199 |
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Test methods for quality of coal water mixture -- Part 5: Determination of the stability of coal water mixture
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GB/T 18856.5-2002
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Basic data | Standard ID | GB/T 18856.5-2008 (GB/T18856.5-2008) | | Description (Translated English) | Test methods for coal water mixture -- Part 5: Determination of the stability | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D21 | | Classification of International Standard | 75.160 | | Word Count Estimation | 7,750 | | Date of Issue | 2008-07-29 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 18856.5-2002 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.12 (Total No.125) | | Issuing agency(ies)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 method of static and dynamic stability of coal-water slurry feed stability, laboratory conditions, equipment, measuring step, calculated results, method precision and test reports. This section applies to a variety of CWS. | GB/T 18856.5-2008: Test methods for coal water mixture -- Part 5: Determination of the stability---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test methods for coal water mixture Part 5. Determination of the stability
ICS 75.160
D21
National Standards of People's Republic of China
Replacing GB/T 18856.5-2002
CWS Test Method
Part 5. Determination of stability
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 GB/T Part of 518,856.
This Part replaces GB/T 18856.5-2002 "quality of coal water mixture - Part 5. Test methods Determination of a coal."
This section compared with the GB/T 18856.5-2002 The main changes are as follows.
--- Increased introduction;
--- The standard contains requirements for the "note" elements into provisions (2002 edition 6.1.4,6.2.4, edition 6.1.4,6.2.3).
This part is proposed by the China Coal Industry Association.
This part of the National Standardization Technical Committee centralized coal.
This section is drafted. CCRI coal analysis laboratory.
The main drafters of this section. Fu Cong, Sun Gang, Li Yinghua.
This Part replaces the previous version and release case.
--- GB/T 18856.5-2002.
Introduction
CWS determination of stability there are many empirical methods, such as measuring stick method, the concentration difference, static observation method, inversion quantitative evaluation method and vibration method
Centrifugation and the like. This part is measured after a certain time CWS vibrating or still not out of the vertical residue (hard deposition) method. That
The method of test conditions easy to control, easy to achieve standardization; the energy of the test results, reproducibility meet the requirements; different CWS have more stability
Good ability to distinguish. However, this method can not distinguish between hard precipitate (generally can not be restored to the stirred fluid) and soft precipitate (gently stir back into
fluid).
CWS Test Method
Part 5. Determination of stability
1 Scope
This section GB/T 18856 specifies the CWS dynamic stability and static stability of a summary, laboratory conditions, the instrument provided
Equipment, precision of the method and test report measuring step, the results of calculations.
This section applies to a variety of CWS.
2 Terms and definitions
The following terms and definitions apply GB/T 18856 in this section.
2.1
CWS oscillation after a certain time to maintain its properties even capacity.
2.2
CWS place after a certain time to maintain its ability homogeneous properties.
3 Method summary
3.1 Dynamic Stability
A certain amount of coal-water slurry sample evenly placed in a container under certain specified conditions oscillation time, the first container was inclined to make free CWS
Outflow vessel was then vertically inverted 8min. The residue weighing of the container, in order to account for the quality of the residue CWS CWS specimen
Score represents the dynamic stability of coal-water slurry.
3.2 Static stability
A certain amount of coal-water slurry sample evenly placed in a container, under specified conditions after standing 7d, first tilt the container so that the free flow of CWS
Out, and then the vessel vertically inverted 8min. The residue was weighed quality container, in order to account for residues CWS CWS sample mass fraction
Number represents the static stability of CWS.
4 laboratory conditions
CWS stability test should be performed at room temperature 18 ℃ ~ 28 ℃ of. During the test, the test chamber temperature as much as possible to maintain a constant temperature changed
Of no more than 3 ℃.
5 Equipment
5.1 shaker. reciprocating shaker amplitude (40 ± 2) mm, frequency (240 ± 20) min-1, the top plate length 42cm, width 30cm, with meter
Timer and continuous vibration than 6h.
5.2 Industrial balance. the largest weighing 1000g, a sense of the amount of 0.1g.
5.3 small specimens (receiver) Bottle. high-pressure polyethylene products, volume of about 180mL, height of about 14cm, small mouth, smooth wall.
5.4 large specimen (reception) Bottle. high-pressure polyethylene products, volume of about 500mL, height of about 11cm, big mouth, smooth wall.
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