GB/T 6730.1-2016 in English
VALIDIron ores―Preparation of predried test samples for chemical analysis
- Issued on:2016-02-24
- Implemented on:2016-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
Introduction
GB/T 6730.1-2016 Standard Overview
| Standard Dimensions | Old Standard (GB/T 6730.1-1986) | New Standard (GB/T 6730.1-2016) |
|---|---|---|
| Scope of Application | Applicable only to natural iron ore and iron concentrate. | Applicable to natural iron ore, iron concentrate, agglomerate and sintered products, and explicitly not applicable to direct reduced iron samples containing metallic iron, iron ore samples with a sulfur content greater than 0.2% or a combined water content greater than 2.5%. |
| Instrument and material requirements | The specific parameters of the balance and oven and the requirements for the weighing bottle are not clearly listed. | Detailed requirements such as the balance sensitivity (0.0001g), oven temperature control (105°C±2°C) and weighing bottle specifications are added, and the use specifications of the dryer and color-changing silica gel are added. |
| Operation steps | The multi-point cumulative sampling method is not mentioned, and the drying conditions are not precise enough. | The weighing bottle pretreatment method, the multi-point cumulative sampling method for sample collection, and the drying time and cooling time requirements are specified in detail, and the weighing steps and data recording methods are optimized. |
Explanation of professional terms and practical application cases
Pre-dried sample: refers to the sample obtained by removing part of the water in the sample through drying under specific temperature and time conditions before chemical analysis.
Layer density: The weight of the sample per unit area is used to measure the compactness of the sample. This standard no longer directly uses the concept of layer density, but instead adopts the constant weight method to ensure the dryness of the sample.
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