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GB/T 41042-2021 PDF in English


GB/T 41042-2021 (GB/T41042-2021, GBT 41042-2021, GBT41042-2021)
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GB/T 41042-2021: PDF in English (GBT 41042-2021)

GB/T 41042-2021
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 73.040
CCS D 21
Guidance for utilization and classification of content of
valuable elements in coal
ISSUED ON: DECEMBER 31, 2021
IMPLEMENTED ON: JULY 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions... 5 
4 Content classification and utilization of valuable elements in coal ... 5 
Annex A (normative) Classification and utilization guidelines of aluminum content in
coal ... 7 
Annex B (normative) Classification and utilization guidelines for gallium content in
coal ... 8 
Annex C (Normative) Classification and utilization guideline of germanium content in
coal ... 9 
Annex D (Normative) Classification and utilization guideline of lithium content in coal
... 10 
Guidance for utilization and classification of content of
valuable elements in coal
1 Scope
This Standard specifies the scheme of content classification of valuable elements
(aluminum, gallium, germanium, lithium, etc.) in coal and the related nomenclature and
codes. It also puts forward the guiding principles for the development and utilization of
valuable elements (aluminum, gallium, germanium, lithium, etc.) in coal.
This Standard is applicable to the evaluation of the content of valuable elements
(aluminum, gallium, germanium, lithium, etc.) in coal in the process of coal exploration,
production, processing, sales and utilization. It guides the development and utilization
of valuable element (aluminum, gallium, germanium, lithium, etc.) resources in coal.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 474, Method for preparation of coal sample
GB/T 475, Method for manual sampling of commercial coal
GB/T 482, Sampling of coal seams
GB/T 1574, Test method for analysis of coal ash
GB/T 8207, Determination of germanium in coal
GB/T 8208, Determination of gallium in coal
GB/T 14506.15, Methods for chemical analysis of silicate rocks - Part 15:
Determination of lithium content
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
MT/T 1034, Method of sampling run-of-mine coal
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 valuable elements in coal
the elements that have high economic value, and a high degree of enrichment in coal,
reaching or close to industrial grade, and have potential for development or
comprehensive utilization as an industrial deposit
4 Content classification and utilization of valuable elements
in coal
4.1 Content classification of valuable elements (aluminum, gallium, germanium,
lithium, etc.) in coal
The content of aluminum in coal shall be classified according to Annex A. The content
of gallium in coal shall be classified according to Annex B. The content of germanium
in coal shall be classified according to Annex C. The content of lithium in coal shall be
classified in accordance with Annex D.
4.2 Comprehensive utilization of coal with extra-high valuable elements
(aluminum, gallium, germanium, lithium, etc.)
4.2.1 The utilization of coal with extra-high valuable elements (aluminum, gallium,
germanium, lithium, etc.) shall fully consider the basic technological properties of the
coal, the main uses, the occurrence form of aluminum, gallium, germanium, lithium
and other elements in the coal, and the relationship with other elements. symbiotic
relationship, as well as the occurrence state and distribution law of harmful elements in
coal that have adverse effects on extraction of valuable elements.
4.2.2 The mining technical conditions such as the thickness, occurrence, scale and
structure of the coal seam, as well as the influence of mining and processing methods
on the coal quality shall be fully considered.
4.3 Collection, preparation and determination of coal samples
4.3.1 Collection of coal samples
The coal samples are taken according to GB/T 475, GB/T 482, GB/T 19494.1, MT/T
1034.
4.3.2 Preparation of coal samples
Prepare coal samples in accordance with the provisions of GB/T 474 and GB/T 19494.2.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.