ISO 687:2024
(Main)Coke - Determination of moisture in the general analysis test sample
Coke - Determination of moisture in the general analysis test sample
This document specifies a method for determining the moisture in the general analysis test sample of coke. It can be used for the determination of moisture in blast-furnace coke, foundry-coke and other high-temperature carbonization products.
Coke — Détermination de l'humidité de l'échantillon pour analyse
General Information
- Status
- Published
- Publication Date
- 14-Mar-2024
- Technical Committee
- ISO/TC 27/SC 5 - Methods of analysis
- Drafting Committee
- ISO/TC 27/SC 5 - Methods of analysis
- Current Stage
- 6060 - International Standard published
- Start Date
- 15-Mar-2024
- Due Date
- 06-Feb-2025
- Completion Date
- 15-Mar-2024
Relations
- Effective Date
- 11-Feb-2023
Overview
ISO 687:2024 - "Coke - Determination of moisture in the general analysis test sample" specifies a standardized gravimetric method for measuring moisture in coke test samples. Applicable to blast-furnace coke, foundry coke and other high‑temperature carbonization products, the method determines moisture by heating a known mass of the general analysis sample until constant mass and calculating the moisture mass fraction from the mass loss. The 2024 fourth edition adds the optional use of nitrogen atmospheres and a minimum free space oven.
Key topics and technical requirements
- Scope: Moisture determination for general analysis test samples of coke and related products.
- Principle: Gravimetric loss-on-drying - heat a weighed sample in air or nitrogen at a controlled temperature until constant mass is achieved.
- Temperatures:
- Typical range: 120 °C to 200 °C (optionally 105 °C for lower-temperature drying).
- Faster procedure: 320 °C in nitrogen (1 h usually sufficient) using a minimum free space oven.
- Atmosphere:
- Dry air or nitrogen (optional); nitrogen must have oxygen < 30 µl/l. Commercial nitrogen with moisture < 5 µl/l is acceptable.
- For nitrogen operation, recommended flow ≈ 15 × oven volume per hour in minimum free space ovens.
- Apparatus and sample:
- Analytical balance with 0.1 mg readability.
- Shallow glass or corrosion‑resistant metal dish with cover; sample layer ≤ 0.20 g/cm²; nominal sample mass 1 ± 0.1 g.
- Cooling vessel (desiccator) without desiccant; option to cool under air or nitrogen flow.
- Procedure highlights:
- Weigh empty dish + cover, add sample, heat until constant mass (reheat 30 min intervals if needed until mass change ≤ 1 mg).
- Report mean of duplicate determinations to nearest 0.1 %.
- Calculation:
- Moisture mass fraction (%) = (mass loss on drying / sample mass before drying) × 100.
- Precision:
- Repeatability limit: 0.2 % absolute for duplicate determinations in the same lab. Reproducibility across labs not specified due to varying humidity conditions.
Applications and users
- Quality control and routine testing in metallurgical plants, coke producers, foundries, and independent analytical laboratories.
- Laboratories correcting other analyses (e.g., volatile matter, hydrogen) to a dry basis when moisture in the general analysis sample must be known.
- Users who require standardized, traceable moisture results for product specification, process control, compliance and inter‑laboratory comparison.
Related standards
- ISO 1213-2 (vocabulary for sampling, testing and analysis) - referenced for terms and definitions.
- ISO 687:2024 complements other coke and coal test methods used in laboratory quality systems.
Keywords: ISO 687:2024, coke moisture determination, moisture in coke, general analysis test sample, minimum free space oven, nitrogen drying, blast-furnace coke, foundry coke.
Frequently Asked Questions
ISO 687:2024 is a standard published by the International Organization for Standardization (ISO). Its full title is "Coke - Determination of moisture in the general analysis test sample". This standard covers: This document specifies a method for determining the moisture in the general analysis test sample of coke. It can be used for the determination of moisture in blast-furnace coke, foundry-coke and other high-temperature carbonization products.
This document specifies a method for determining the moisture in the general analysis test sample of coke. It can be used for the determination of moisture in blast-furnace coke, foundry-coke and other high-temperature carbonization products.
ISO 687:2024 is classified under the following ICS (International Classification for Standards) categories: 75.160.10 - Solid fuels. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 687:2024 has the following relationships with other standards: It is inter standard links to ISO 687:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 687:2024 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
International
Standard
ISO 687
Fourth edition
Coke — Determination of moisture
2024-03
in the general analysis test sample
Coke — Détermination de l'humidité de l'échantillon pour
analyse
Reference number
© ISO 2024
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 1
7 Preparation of the test sample. 2
8 Procedure . 2
9 Expression of results . 3
10 Precision . 3
10.1 Repeatability limit .3
10.2 Reproducibility limit .3
11 Test report . 3
Annex A (informative) Example of a suitable oven for drying in nitrogen . 4
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 5, Methods
of analysis.
This fourth edition cancels and replaces the third edition (ISO 687:2010), which has been technically revised.
The main change is as follows:
— adding the optional use of nitrogen and a minimum free space oven.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
The determination of moisture in the general analysis test sample is required to correct the results of certain
analytical determinations, e.g. volatile matter and hydrogen, for the effect of water in the determination and
to allow all determinations to be corrected to a dry basis.
Since coke is hygroscopic, its moisture will vary with a change in humidity of the atmosphere, and the
moisture in the genera
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Die ISO 687:2024 bietet einen klaren und präzisen Standard zur Bestimmung des Feuchtigkeitsgehalts im allgemeinen Analyse-Testmuster von Koks. Dieses Dokument ist von großer Bedeutung für die Industrie, da es eine standardisierte Methode zur Verfügung stellt, die für verschiedene Arten von Koks, einschließlich Hochofen-Koks und Gießereikoks, anwendbar ist. Ein zentraler Stärke dieser Norm liegt in ihrer Anwendbarkeit auf verschiedene hochtemperaturkarbonisierte Produkte, was sie zu einem vielseitigen Instrument für die Qualitätskontrolle und Analyse in verschiedenen Sektoren der Kohlenstoffverarbeitung macht. Die methodische Herangehensweise gewährleistet eine hohe Genauigkeit und Konsistenz der Ergebnisse, was für Fachleute in der Branche von entscheidender Bedeutung ist. Darüber hinaus trägt die Einhaltung der ISO 687:2024 zur Verbesserung der Produktqualität bei, da sie den Anwendern hilft, genaue Feuchtigkeitsdaten zu ermitteln, die für die optimierte Verarbeitung und Anwendung von Koks erforderlich sind. Die Standardisierung dieser Methode unterstreicht zudem die Relevanz und den Wert von international anerkannten Normen im Bereich der Materialanalytik und der industriellen Entwicklung. Insgesamt stellt die ISO 687:2024 eine unverzichtbare Ressource für Unternehmen dar, die auf präzise und zuverlässige Größen zur Feuchtigkeitsbestimmung in Koks angewiesen sind. Dies fördert nicht nur die Effizienz in den Produktionsprozessen, sondern unterstützt auch die Einhaltung internationaler Qualitätsstandards.
ISO 687:2024は、コークスの一般分析試料における水分の測定方法を明確に規定した標準です。この標準の範囲は、作業者がコークスの水分を正確に評価できるように設計されており、主に高温炭化製品である高炉コークス、鋳造コークスなどに適用できます。 ISO 687:2024の強みは、信頼性の高い測定手法を提供する点にあります。これにより、業界の標準とは異なる条件や材料を考慮しつつ、一貫した測定結果が得られることが可能です。また、この標準は、試料の取り扱いや前処理に関する具体的なガイドラインも含んでおり、ユーザーが手順を容易に理解し実施できるよう配慮されています。 この標準の関連性は、エネルギー効率や製品品質の向上が求められる現代のコークス生産プロセスにおいてますます重要になっています。ISO 687:2024に従うことで、企業はコークスの特性を適切に把握し、品質管理を強化することができるため、業界全体の生産性向上に寄与します。従って、ISO 687:2024は、コークス産業にとって欠かせない基準となっています。
La norme ISO 687:2024 constitue une avancée significative dans le domaine de l'analyse du coke, en précisant une méthode fiable pour la détermination de l'humidité dans les échantillons de test pour l'analyse générale. Son champ d'application s'étend à différents types de coke, notamment le coke de haut fourneau, le coke de fonderie et d'autres produits issus de la carbonisation à haute température, ce qui en fait un outil essentiel pour les laboratoires de contrôle de qualité et les industries impliquées dans la production de coke. Parmi les points forts de l'ISO 687:2024, on trouve la précision et la reproductibilité de la méthode pour déterminer l'humidité, essentielles pour assurer la qualité et la conformité des produits en fonction des exigences industrielles. La norme fournit des directives claires et concises, facilitant son adoption par les praticiens, tout en garantissant que les résultats obtenus sont fiables et conformes aux standards de l'industrie. La pertinence de cette norme ne peut être sous-estimée dans un contexte où la qualité des matériaux, notamment dans la sidérurgie et la fonderie, joue un rôle crucial pour la performance et la durabilité des produits finaux. En intégrant la norme ISO 687:2024 dans les processus d'analyse, les entreprises peuvent améliorer leur contrôle qualité, optimiser leurs procédés de production et ainsi, mieux répondre aux exigences du marché. En résumé, ISO 687:2024 se positionne comme une norme indispensable pour la détermination de l'humidité dans les échantillons de coke, offrant une méthode claire, précise et adaptée aux besoins variés des secteurs qui utilisent du coke.
The ISO 687:2024 standard provides a robust framework for determining moisture levels in coke samples, which is crucial for various industries utilizing blast-furnace and foundry coke, as well as other carbonization products. The standard specifically details a method for analyzing moisture content, ensuring consistency and reliability in test results across different applications. One of the notable strengths of ISO 687:2024 is its comprehensive approach to the analysis of moisture. By focusing on the general analysis test sample of coke, it allows for accurate assessments that can influence production processes and quality control measures. The relevance of this standard is underscored by the importance of moisture content in coke, which can significantly affect its performance in metallurgical processes. Furthermore, the standard is essential for laboratories and organizations involved in coke production and utilization, as it establishes a clear methodology that adheres to international best practices. This alignment with global standards not only enhances the credibility of laboratories conducting these analyses but also fosters trust among stakeholders regarding the quality of coke produced. In summary, ISO 687:2024 is a critical standard for the determination of moisture in coke, offering a reliable method that strengthens testing procedures and supports quality assurance in the industry.
ISO 687:2024 표준은 콕스의 일반 분석 시험 샘플에서 수분을 결정하는 방법을 규정하고 있습니다. 이 문서는 제철소에서 사용하는 블라스트 퍼니스 콕스, 주조용 콕스 및 기타 고온 탄소화 제품의 수분을 측정하는 데 적합합니다. ISO 687:2024의 주요 강점은 다양한 종류의 콕스 샘플에 적용할 수 있는 방법을 제시한다는 점입니다. 이는 사용자가 각기 다른 환경에서도 신뢰할 수 있는 수분 측정 결과를 얻을 수 있게 하여 실험실의 일관성을 보장합니다. 또한, 이 표준은 정확한 수분 측정을 통해서 생산 공정의 최적화를 도와주며, 제조업체가 품질 관리를 향상시킬 수 있는 기반을 제공합니다. 이 표준은 특히 제철 및 주조 산업에서의 중요성이 높아지고 있으며, 고온 탄소화 제품의 품질 보증을 위한 필수 도구로 자리 잡고 있습니다. 따라서 ISO 687:2024는 콕스의 수분 결정에 있어 유용한 기준을 제공하며, 다양한 산업 분야의 연구 및 생산활동에 매우 중요한 역할을 합니다.
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