1 Scope
This standard specifies reagents and materials, instrument and equipment, analysis procedure, result calculation and method precision for the determination of ferrum, calcium, magnesium, kalium, sodium, manganese, phosphorus, silicon, aluminum, titanium and sulphur in coal ash.
This standard is applicable to coal, coke, coal water slurry and coal gangue.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions of these labels are applied or not. For any undated references, the latest edition of the document referred to applies.
GB/T 483 General Rules for Analytical and Testing Methods of Coal
3 Reagents
Water mentioned in this standard is deionized water or distilled water with equal purity.
4 Instrument and Equipment
4.1 Muffle furnace: with temperature regulating device and thermocouple, pyrometer; it can maintain at (815 ± 10) ℃ and shall have corresponding area with constant temperature; upper part of its back wall is chimney with diameter of 25mm~30mm, lower part is a hole (inserted into thermocouple) whose position shall be such that hot junction of the thermocouple can be 20mm~30mm away from the furnace bottom; a ventilation hole (diameter: about 20mm) shall be on the furnace door.
4.2 High-temperature muffle furnace: with temperature control device; it can maintain at (1000±10)℃.
4.3 Analytical balance: with a sensitivity of 0.1mg.
4.4 Spectrophotometer.
4.5 Atomic absorption spectrophotometer.
4.6 Flame photometer.
4.7 Coulomb sulfur meter.
4.8 Platinum crucible: 30 mL.
4.9 Silver crucible: 30 mL.
4.10 Porcelain crucible: 30 mL.
4.11 Cupel: (120×60×14)mm.
Foreword I
1 Scope
2 Normative References
3 Reagents
4 Instrument and Equipment
5 Preparation of Ash Sample
6 Semimicroanalysis Method of Silica, Ferric Oxide, Titanium Dioxide, Aluminum Oxide, Calcium Oxide and Magnesium Oxide
6.1 Preparation of Test Solution
6.2 Determination of Silicon Dioxide (Spectrophotometric Method with Silicomolybdenum Blue)
6.3 Continuous Determination of Ferric Oxide and Titanium Dioxide (Spectrophotometric Method with Ferrotitanium Reagent)
6.4 Separate Determination of Titanium Dioxide (Spectrophotometric Method with Antipyrine)
6.5 Determination of Aluminum Oxide (Complexometric Titration with Villiaumite Replacing EDTA)
6.6 Determination of Calcium Oxide (EGTA Complexometric Titration)
6.7 Determination of Magnesium Oxide (EDTA Complexometric Titration)
7 Macroanalysis Method of Silicon Dioxide, Ferric Oxide, Aluminum Oxide, Calcium Oxide, Magnesium Oxide and Titanium Dioxide
7.1 Determination of Silicon Dioxide (Animal Glue Condensing Mass Method )
7.2 Continuous Determination of Ferric Oxide and Aluminum Oxide (Complexometric Titration with EDTA)
7.3 Determination of Calcium Oxide (EDTA Complexometric Titration)
7.4 Determination of Magnesium Oxide (Complexometric Titration with EDTA, Subtraction Method)
7.5 Determination of Titanium Dioxide (Spectrophotometric Method with Hydrogen Peroxide)
8 Determination of Sulfur Trioxide
8.1 Barium Sulfate Mass Method
8.2 Combustion Neutralization Method
8.3 CoulombTitration
9 Determination of Phosphorus Pentoxide (Spectrophotometric Method with Phosphomolybdenum Blue)
9.1 Method I
9.2 Method II
10 Determination of Potassium Oxide and Sodium Oxide (Flame Photometry)
11 Method for Determination of Potassium, Sodium, Ferrum, Calcium, Magnesium and Manganese (Atomic Absorption Method)
12 Test Report
