Standard No.:	GB/T 41042-2021
English Name:	Guidance for utilization and classification of content of valuable elements in coal
Chinese Name:	煤中有价元素含量分级及应用导则
Chinese Classification:	D21    Coal analysis methods
Professional Classification:	GB    National Standard
Issued by:	SAMR; SAC
Issued on:	2021-12-31
Implemented on:	2022-7-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	5500 words
Price(USD):	165.0
Delivery:	via email in 1 business day

1 Scope This document sets out a scheme for grading the content of valuable elements (aluminium, gallium, germanium, lithium, etc.) in coal and the associated nomenclature and designations, and sets out guiding principles for the development This document specifies the classification scheme of valuable elements (aluminium, gallium, germanium, lithium, etc.) in coal and the related nomenclature and codes, and proposes guiding principles for the development and utilization of valuable elements (aluminium, gallium, germanium, lithium, etc.) in coal. This document applies to the evaluation of the content of valuable elements (aluminium, gallium, germanium, lithium, etc.) in coal during the process of coal exploration, production, processing, marketing and utilization. This document applies to the evaluation of the content of valuable elements (aluminium, gallium, germanium, lithium, etc.) in coal during the process of coal exploration, production, processing, marketing and utilization, and guides the development and utilization of valuable elements (aluminium, gallium, germanium, lithium, etc.) in coal. 2 Normative references The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the date of the cited documents The latest version (including all revision sheets) of the undated references is applicable to this document. This document. GB/T 474 Methods of preparation of coal samples GB/T 475 Method of taking commercial coal samples by hand GB/T 482 Methods of taking coal samples from coal seams GB/T 1574 Methods of analysis of coal ash components GB/T 8207 Method for the determination of germanium in coal GB/T 8208 Method for the determination of gallium in coal GB/T 14506.15 Method for the chemical analysis of silicate rocks Part 15: Determination of lithium GB/T 19494.1 Mechanized sampling of coal Part 1: Sampling methods GB/T 19494.2 Mechanical sampling of coal Part 2: Preparation of coal samples MT/T 1034 Methods of taking production coal samples 3 Terminology and definitions The following terms and definitions apply to this document. 3.1 Valuable elements in coal Elements that have a high economic value and are enriched in coal to a high degree, at or near industrial grade, and have the potential to be developed as an industrial deposit or for comprehensive use. The elements that have high economic value and are enriched in coal to a high degree, at or near the industrial grade, and have the potential to be developed or utilised as industrial deposits. 4 Classification and utilisation of valuable elements in coal 4.1 Classification of valuable elements (aluminium, gallium, germanium, lithium, etc.) in coal The content of aluminium in coal shall be classified in accordance with Appendix A, the content of gallium in coal shall be classified in accordance with Appendix B, the content of germanium in coal shall be classified in accordance with Appendix C, and the content of valuable elements in coal shall be classified in accordance with Appendix B. The content of gallium in coal shall be classified in accordance with Appendix B, the content of germanium in coal shall be classified in accordance with Appendix C and the content of lithium in coal shall be classified in accordance with Appendix D. 4.2 Comprehensive utilization of coal with very high valued elements (aluminium, gallium, germanium, lithium, etc.) 4.2.1 The utilization of coal with extra high valuable elements (aluminium, gallium, germanium, lithium, etc.) shall take into full consideration the basic process nature of the coal, its main use, the assignment form of aluminium, gallium, germanium, lithium and other elements in the coal, the symbiotic relationship with other elements, as well as the assignment state and distribution law of harmful elements in the coal that have adverse effects on the extraction of valuable elements. 4.2.2 Full consideration shall be given to the thickness, yield, size and configuration of the coal seam and other technical conditions of mining, as well as the influence of mining and processing methods on the quality of the coal. 4.3 Taking, preparation and determination of coal samples 4.3.1 Collection of coal samples Coal samples shall be taken in accordance with GB/T 475, GB/T 482, GB/T 19494.1 and MT/T 1034. 4.3.2 Preparation of coal samples Coal samples are prepared in accordance with the provisions of GB/T 474, GB/T 19494.2. 4.3.3 Determination of the content of valuable elements in coal The determination of aluminium content in coal shall be carried out in accordance with GB/T 1574, the determination of gallium content in coal shall be carried out in accordance with GB/T 8208, the determination of germanium content in coal shall be carried out in accordance with GB/T 8207. The determination of the content of lithium in coal shall be carried out in accordance with GB/T 14506.15.

Foreword 1 Scope 2 Normative references 3 Terminology and definitions 4 Classification and utilisation of valuable elements in coal Annex A (Normative) Classification of aluminium content in coal and guidelines for its application Annex B (Normative) Classification of Gallium in Coal and Guidelines for its Application Annex C (Normative) Classification of germanium in coal and guidelines for its application Annex D (Normative) Classification of Lithium in Coal and Guidelines for its Application