GB/T 25211-2023 English PDF (GBT25211-2023)

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GB/T 25211-2023: Classification and quality requirements of semi-coke
GB/T 25211-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 75.160.10
CCS D 20
Replacing GB/T 25211-2010, GB/T 25212-2010
Classification and quality requirements of semi-coke
ISSUED ON: SEPTEMBER 07, 2023
IMPLEMENTED ON: APRIL 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Quality grades ... 7
5 Quality requirements ... 8
6 Test methods ... 13
7 Quality inspection ... 14
8 Transportation and storage ... 14
Classification and quality requirements of semi-coke
1 Scope
This document specifies the quality grades, quality requirements, test methods, quality
inspection and acceptance, transportation and storage of semi-coke products.
This document applies to all types of semi-coal products.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 211, Determination of total moisture in coal
GB/T 212, Proximate analysis of coal
GB/T 213, Determination of calorific value of coal
GB/T 214, Determination of total sulfur in coal
GB/T 216, Determination of phosphorus in coal
GB/T 219, Determination of fusibility of coal ash
GB/T 474, Method for preparation of coal sample
GB/T 475, Method for manual sampling of commercial coal
GB/T 1574, Test method for analysis of coal ash
GB/T 2565, Determination of grindability index of coal - Hardgrove method
GB/T 3058, Determination of arsenic in coal
GB/T 3558, Determination of chlorine in coal
GB/T 16659, Determination of mercury in coal
GB/T 19494.1, Mechanical sampling of coal - Part 1: Method for sampling
GB/T 19494.2, Mechanical sampling of coal - Part 2: Method for sample
preparation
GB/T 24521, Method for the determination of specific resistance of carbon raw
materials and coke
GB/T 25214, Determination of total sulfur in coal by IR spectrometry
GB/T 30732, Proximate analysis of coal - Instrumental method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
semi-coke
A low-volatility solid carbon product obtained by pyrolyzing high-volatile bituminous
coal with no or weak cohesiveness under medium and low temperature conditions.
3.2
mixed semi-coke
Semi-coke products with a particle size of “less than 50 mm” or “less than 80 mm” that
have not been crushed and screened.
3.3
sized semi-coke
Semi-coke products with particle size greater than or equal to 6 mm.
3.4
large-size semi-coke
Semi-coke products with particle size greater than 25 mm.
3.5
medium-size semi-coke
Semi-coke products with particle size greater than 13 mm and less than 25 mm.
3.6
small-size semi-coke