This standard specifies the chemical analysis of alumina-silica refractories.
This standard is applicable to the determination of loss on ignition and the content of silicon dioxide, aluminum oxide, iron oxide, titanium dioxide, calcium oxide, magnesium oxide, potassium oxide, sodium oxide, manganese oxide, phosphorus pentoxide, zirconium oxide and chromic oxide in alumina-silica refractories. See Table 1 for the determination range.
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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 4984 Chemical analysis of refractories containing zirconia
GB/T 7728 Chemical analysis of metallurgical products - General rule for flame atomic absorption spectrometric methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 10325 Shaped refractory products - Rule of acceptance, sampling and inspection
GB/T 12805 Laboratory glassware - Burettes
GB/T 12806 Laboratory glassware - One-mark volumetric flask
GB/T 12808 Laboratory glassware - One-mark pipettes
GB/T 17617 Refractory products - Sampling of raw materials and unshaped products
GB/T 32179 Chemical analysis of refractories - General requirements for wet chemical analysis, atomic absorption spectrometry (AAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) methods
3 Instruments and apparatus
3.1 Balance (with a sensibility of 0.1mg).
3.2 Platinum crucible or porcelain crucible (30mL).
3.3 Automatic temperature-controlled dryer.
3.4 High temperature furnace: electric box furnace with maximum service temperature ≥1100℃ and capable of controlling temperature automatically.
