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
