ISO 549:1981 PDF

Manganese ores — Determination of combined water content — Gravimetric method

Open preview (PDF)

Title (English):

ISO 549:1981

Manganese ores — Determination of combined water content — Gravimetric method

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 3
Publication date:: December 1, 1981
Edition:: ISO IS 549 edition 2 version 1
ICS:: 73.060.20

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Technical details

Technical committee: ISO/TC 132 - Ferroalloys
SKU: ISO 549:1981

Abstract

Overview

ISO 549:1981 specifies a gravimetric analytical method to determine the combined water content (water of constitution) in manganese ores. The method separates water by heating a prepared test portion in a stream of dry air and collects the evolved water in absorbent traps. It is intended to be read in conjunction with ISO 4297 and used with appropriate sampling and sample preparation procedures (see ISO 4296/1 and ISO 4296/2).

This standard is aimed at laboratories and quality-control teams within mining, mineral processing and analytical services that require repeatable, comparable moisture measurements for manganese ore characterization.

Key Topics

Principle: Separation of combined water from the ore by heating a measured test portion in a current of dry air and gravimetric measurement of the water collected in absorbent tubes.
Apparatus highlights:
- Quartz (or porcelain) tube approx. 500–600 mm long, 18–20 mm internal diameter with a tapered end (50 mm taper, 1–2 mm bore).
- Two tubular electric furnaces to heat different tube zones (one to ca. 800–900 °C, one to lower temperatures for the sample zone).
- Filling materials: mixtures of lead oxide (PbO), lead dioxide (PbO2) and calcined pumice, or alternatively a silver coil in the tube.
- Absorbent traps filled with magnesium perchlorate [Mg(ClO4)2], and a drying train using a wash bottle with sulfuric acid.
Sampling and sample preparation: Use procedures described in ISO 4296/1 and ISO 4296/2 to obtain an analytical test portion (typically ground to

Related standards

Standards mentioned in the description

Overview

Key Topics

Principle: Separation of combined water from the ore by heating a measured test portion in a current of dry air and gravimetric measurement of the water collected in absorbent tubes.
Apparatus highlights:
- Quartz (or porcelain) tube approx. 500–600 mm long, 18–20 mm internal diameter with a tapered end (50 mm taper, 1–2 mm bore).
- Two tubular electric furnaces to heat different tube zones (one to ca. 800–900 °C, one to lower temperatures for the sample zone).
- Filling materials: mixtures of lead oxide (PbO), lead dioxide (PbO2) and calcined pumice, or alternatively a silver coil in the tube.
- Absorbent traps filled with magnesium perchlorate [Mg(ClO4)2], and a drying train using a wash bottle with sulfuric acid.
Sampling and sample preparation: Use procedures described in ISO 4296/1 and ISO 4296/2 to obtain an analytical test portion (typically ground to

ISO 549:1981 PDF

Technical details

Abstract

Overview

Key Topics

Related standards

Abstract

Overview

Key Topics

Related standards

Manganese ores and concentrates -- Methods of chemical analysis -- General instructions

Manganese ores -- Sampling -- Part 1: Increment sampling

Manganese ores -- Sampling -- Part 2: Preparation of samples