ISO 20905:2024 PDF

Name: ISO 20905:2024 — Coal preparation — Determination of dust/moisture relationship for coal
SKU: ISO 20905:2024
Price: 25 EUR
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Coal preparation — Determination of dust/moisture relationship for coal

Название (английский):

ISO 20905:2024

Coal preparation — Determination of dust/moisture relationship for coal

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 9 октября 2024 г.
Издание:: ISO IS 20905 edition 2 version 1
ICS:: 73.040

Тип поставки:

Full version180 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:2 раб. дн. (перевод)

Цена:180 €

Описание (английский):

This document sets out a laboratory procedure for the dust testing of higher rank coals. The procedure defines a means of evaluating the dust/moisture relationship characteristic of a coal and a dust extinction moisture (DEM). NOTE In this document, an experimental dust number of 10 has been used in the example given in Annex A.

Abstract

Overview - ISO 20905:2024 (Coal preparation - dust/moisture relationship for coal)

Key topics and technical requirements

Scope and purpose: Establishes a repeatable laboratory test for coal dustiness and DEM to compare coals and assess dust-control measures.
Controlled environment: Test laboratory at 63 % ± 2 % relative humidity and 20 °C ± 2 °C.
Apparatus: Dust-test drum (30 cm diameter × 30 cm effective length), 29 r/min drum speed, airflow ~175 L/min, and double-filter bags for −150 µm dust collection.
Sample requirements: Approximately 1.2 kg per dust test; about eight subsamples (~10 kg total) across a range of moisture values to develop the dust/moisture curve. Initial particle fraction >6.3 mm is removed and not reintroduced.
Moisture adjustment and reagents: Procedures for increasing or reducing total moisture (spray addition, low-temperature drying, or 40 °C oven when needed) and for adding aqueous reagents with controlled dosing. Use of a syringe per ISO 7886-1 for final additions is specified.
Safety and quality controls: Personal protective equipment (dust mask, safety glasses, gloves); ensure exhausts remain clear; environmental and equipment checks; calculation, reporting, and precision clauses.
Definitions: Dust = particles ≤150 µm entrained in an airstream; DEM = moisture at dust number 10 on the curve.

Applications - practical value and users

ISO 20905 is used to:

Predict operational dust problems and set moisture targets for handling and transport.
Evaluate effectiveness and dosing of dust-suppression reagents.
Optimize water use in mines and coal-handling facilities by identifying minimal moisture needed to control dust (supporting water conservation). Primary users include coal preparation laboratories, mine operators, process engineers, reagent manufacturers, environmental & occupational health teams, and testing service providers.

Related standards

ISO 589 - Hard coal - Determination of total moisture (referenced for moisture measurement).
ISO 7886-1 - Sterile hypodermic syringes for single use (syringe use for reagent dosing).
ISO 1953 - Particle size distribution (referenced for sample characterization).

Keywords: ISO 20905, dust/moisture relationship, coal dust testing, dust extinction moisture (DEM), Rio Tinto Dust Tumbler Test, coal preparation, dust suppression, laboratory procedure.

Технические детали

Технический комитет: ISO/TC 27/SC 1 - Coal preparation: Terminology and performance
SKU: ISO 20905:2024

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ISO 20905:2024 PDF

Abstract

Overview - ISO 20905:2024 (Coal preparation - dust/moisture relationship for coal)

Похожие стандарты

Key topics and technical requirements

Applications - practical value and users

Related standards

Технические детали

SIST EN ISO 7886-1:2018

Sterile hypodermic syringes for single use - Part 1: Syringes for manual use (ISO 7886-1:2017, Corrected vers…

SIST ISO 20905:2005

Coal preparation -- Determination of dust/moisture relationship for coal

ISO 5893:2019/Amd 1:2020

Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of traverse) — Sp…

SIST ISO 1953:2016

Hard coal - Size analysis by sieving