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GB/T 18856.4-2008: Test methods for coal water mixture -- Part 4: Determination of apparent viscosity
Status: Valid GB/T 18856.4: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 18856.4-2008 | English | 139 |
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Test methods for coal water mixture -- Part 4: Determination of apparent viscosity
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GB/T 18856.4-2008
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| GB/T 18856.4-2002 | English | 199 |
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Test methods for quality of coal water mixture -- Part 4: Determination of apparent viscosity of coal water mixture
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GB/T 18856.4-2002
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Basic data | Standard ID | GB/T 18856.4-2008 (GB/T18856.4-2008) | | Description (Translated English) | Test methods for coal water mixture -- Part 4: Determination of apparent viscosity | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D21 | | Classification of International Standard | 75.160 | | Word Count Estimation | 6,646 | | Date of Issue | 2008-07-29 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 18856.4-2002 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.12 (Total No.125) | | Issuing agency(ies)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 use coaxial cylinder rotary viscometer apparent viscosity of CWS terms and definitions, method feeds, reagents and materials, equipment, test procedure, , experimental conditions calculated results, method precision and test reports. This section applies to a variety of CWS. | GB/T 18856.4-2008: Test methods for coal water mixture -- Part 4: Determination of apparent viscosity
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Test methods for coal water mixture Part 4. Determination of apparent viscosity
ICS 75.160
D21
National Standards of People's Republic of China
Replacing GB/T 18856.4-2002
CWS Test Method
Part 4. Determination of apparent viscosity
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 418,856.
This Part replaces GB/T 18856.4-2002 "quality of coal water mixture - Part 4. Test methods Determination of apparent viscosity of coal water mixture."
This portion of the GB/T 18856.4-2002 compared to major amended as follows.
--- Increasing the test report a chapter (10th edition).
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. Wang Wenliang, Fu Cong.
This part of the standard replaces the previous editions are.
--- GB/T 18856.4-2002.
CWS Test Method
Part 4. Determination of apparent viscosity
1 Scope
GB/T 18856 provisions of this part of the coaxial cylinder rotational viscometer CWS apparent viscosity of terms and definitions, methods mention
To, reagents and materials, equipment, test conditions, test procedure, the results of the calculation, method precision and test reports.
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
The amount of change in the fluid flow rate per unit distance is called a shear rate, with Ds, the unit is s-1.
2.2
Between two parallel planes cutting fluid that is, per unit surface area of \u200b\u200bcontact normal gradient is 1, the fluid viscosity caused by internal friction
Rub or size of the force called shear viscosity. Non-Newtonian fluid viscosity at a shear rate referred to in the apparent shear rate
Viscosity.
2.3
This part η100s-1 represents a shear rate of 100s
-1 Apparent viscosity of coal-water slurry, the unit is mPas (mPa · s). under
Subscript represents the shear rate measurement.
3 Method summary
Charged with coaxial cylinder viscometer appropriate amount of the outer cylinder CWS, at a predetermined temperature, the inner tube at a constant angular speed, measured rotation
It suffered during cylinder sticky moment to arrive at the appropriate apparent viscosity shear rate.
4 Reagents and materials
Dynamic viscosity value of about 300mPa · s ~ 2500mPa · s (20 ℃), a group of four certified reference viscosity fluid.
5 Equipment
5.1 viscometer. meet the following requirements binoculars coaxial viscometer.
Inner tube. diameter, 36.8mm; height, 60.0mm;
The outer cylinder. diameter, 42.0mm; height, > 60.0mm;
Measuring range. 1mPa · s ~ 1 × 104mPa · s;
Shear rate. 1s-1 ~ 150s-1, adjustable;
Accuracy. 0.2%;
Measurement error. 2.5%.
5.2 Thermostat. Thermostat range, 5 ℃ ~ 60 ℃; accuracy, ± 0.1 ℃.
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