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sklademVydáno: 1990-02-28
BS 7020-22:1990
Analysis of iron ores Method for the determination of acid-soluble iron (II) content. Titrimetric method
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| Označení normy: | BS 7020-22:1990 |
| Počet stran: | 14 |
| Vydáno: | 1990-02-28 |
| ISBN: | 0 580 18074 3 |
| Status: | Standard |
Popis
BS 7020-22:1990
This standard BS 7020-22:1990 Analysis of iron ores is classified in these ICS categories:
- 73.060.10 Iron ores
This International Standard specifies a method for the determination of iron(II) content in natural and processed iron ores containing from 1 % to 25 % acid-soluble iron(II) and only traces of metallic iron. This method is specifically limited for use in conjunction with the reducibility test methods specified in ISO 4695 or ISO 7215.
This method is not applicable to ores containing more than 0,3 % (m/m) sulfur (as sulfide) and/or 5 % (m/m) free carbon. Experiments have shown that the acid-insoluble residue can be neglected, especially as regards the needs of the reducibility test methods concerned and the precision obtainable.
Method for natural and processed iron ores containing from 1% to 25% acid-soluble iron (II) and only traces of metallic iron.