ISO 4700:2015 PDF

Iron ore pellets for blast furnace and direct reduction feedstocks — Determination of the crushing strength

Название (английский):

ISO 4700:2015

Iron ore pellets for blast furnace and direct reduction feedstocks — Determination of the crushing strength

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 5
Дата публикации:: 5 августа 2015 г.
Издание:: ISO IS 4700 edition 4 version 1
ICS:: 73.060.10

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Описание (английский):

ISO 4700:2015 specifies a method to provide a measure of the compressive load attained to cause breakage of pellets. This International Standard is applicable to hot bonded pellets.

Технические детали

Технический комитет: ISO/TC 102/SC 3 - Physical testing
SKU: ISO 4700:2015

Abstract

Overview

ISO 4700:2015 defines a standardized laboratory method to determine the crushing strength of iron ore pellets used as blast furnace and direct reduction feedstocks. The standard applies to hot bonded pellets and gives a repeatable procedure to measure the compressive load that causes pellet breakage. Results are intended for quality control, contractual specifications and research, enabling consistent comparison between laboratories.

Key topics and requirements

Scope: Measures the compressive load to cause pellet breakage for hot bonded pellets.
Sample preparation
- Pellet size range: −12.5 mm +10.0 mm.
- Test sample: at least 1 kg (dry basis).
- Oven-dry to constant mass at 105 °C ± 5 °C, then cool to room temperature.
Test portion: Random selection of ≥ 60 pellets (minimum), or more where precision demands.
Apparatus
- Two surface‑hardened steel, parallel flat platens.
- Platen speed adjustable 10–20 mm/min (constant speed recommended).
- Load transmission: load cell or lever; load cell capacity ≥ 10 kN.
- Load indicator/recorder with suitable response and graduation.
Procedure
- Compress single pellets centrally between platens at specified speed.
- Test ends when either the load drops to ≤ 50% of the maximum recorded or the platen gap reduces to 50% of initial mean pellet diameter.
- For automatic equipment, exclude individual pellet strength values

Overview

Key topics and requirements

Scope: Measures the compressive load to cause pellet breakage for hot bonded pellets.
Sample preparation
- Pellet size range: −12.5 mm +10.0 mm.
- Test sample: at least 1 kg (dry basis).
- Oven-dry to constant mass at 105 °C ± 5 °C, then cool to room temperature.
Test portion: Random selection of ≥ 60 pellets (minimum), or more where precision demands.
Apparatus
- Two surface‑hardened steel, parallel flat platens.
- Platen speed adjustable 10–20 mm/min (constant speed recommended).
- Load transmission: load cell or lever; load cell capacity ≥ 10 kN.
- Load indicator/recorder with suitable response and graduation.
Procedure
- Compress single pellets centrally between platens at specified speed.
- Test ends when either the load drops to ≤ 50% of the maximum recorded or the platen gap reduces to 50% of initial mean pellet diameter.
- For automatic equipment, exclude individual pellet strength values

ISO 4700:2015 PDF

Технические детали

Abstract

Overview

Key topics and requirements

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Abstract

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