Detail of GB/T 20424-2025

Introduction of GB/T 20424-2025

ICS 77.150.01 CCS H 62 National Standard of the People's Republic of China GB/T 20424-2025 Replaces GB/T 20424-2006 The specification for limit on harmful element content of the heavy nonferrous metal concentrates products 重有色金属精矿产品中有害元素的限量规范 (English Translation) Issue date: 2025-02-28 Implementation date: 2025-09-01 Issued by the State Administration for Market Regulation the Standardization Administration of the People's Republic of China Contents Foreword i 1 Scope 1 2 Normative references 1 3 Terms and definitions 3 4 Limit requirements 4 5 Test methods 6 6 Inspection rules 7 Foreword Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents. This document replaces GB/T 20424-2006 The specification for limit on harmful element content of the heavy metal concentrates products. In addition to structural adjustment and editorial changes, the following main technical changes have been made with respect to GB/T 20424-2006: a) Some terms and definitions of concentrates are modified, and the term "antimony concentrate" and its definition are added (see Clause 3 hereof; Clause 3 of Edition 2006); b) The limit of As in lead concentrate is modified from 0.70% to 0.60% (see 4.2 hereof; 4.2 of Edition 2006); c) The limits of Cd and Tl in lead concentrate are added, which are 0.40% and 0.02% respectively (see 4.2 hereof); d) The limit of As in zinc concentrate is modified from 0.60% to 0.50% (see 4.3 hereof; 4.3 of Edition 2006); e) The limit of Tl in zinc concentrate is added, which is 0.02% (see 4.3 hereof); f) The limit of Tl in the lead and zinc bulk concentrate is added, which is 0.02% (see 4.4 hereof); g) The limit of As in tin concentrate is modified from 2.50% to 2.00% (see 4.5 hereof; 4.5 of Edition 2006); h) The limits of Pb and As in cobalt concentrate are modified from 0.10% to 0.08% (see 4.7 hereof; 4.7 of Edition 2006); i) The limit of Cr in the cobalt concentrate is added, which is 0.05% (see 4.7 hereof); j) The limits of As, Cd and Hg in antimony concentrate are added, which are 0.60%, 0.0050% and 0.0050% respectively (see 4.8 hereof); k) The test method for Hg in lead concentrates is modified (see 5.2 hereof; 5.2 of Edition 2006); l) The test methods for Cd and Tl in lead concentrates are added (see 5.2 hereof); m) The test method for Tl in zinc concentrates is added (see 5.3 hereof); n) The test method for Tl in lead and zinc bulk concentrate is added (see 5.4 hereof); o) The test method for Cr in cobalt concentrates is added (see 5.7 hereof); p) The test methods for As, Cd and Hg in antimony concentrate are added (see 5.8 hereof); q) The contents of inspection rules for antimony concentrate are supplemented (see Clause 6 hereof). Attention is drawn to the possibility that some content of this document may involve patents. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by China Non-ferrous Metals Industry Association. This document is under the jurisdiction of National Technical Committee on Nonferrous Metals of Standardization Administration of China (SAC/TC 243). This document was first issued as GB 20424-2006 in 2006, and became a recommended standard in 2017; this is the first revision. The specification for limit on harmful element content of the heavy nonferrous metal concentrates products 1 Scope This document specifies the limit requirements, test methods and inspection rules for harmful elements contained in heavy nonferrous metal concentrate products. This document is applicable to heavy nonferrous metal concentrate products. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions 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 1819.4 Methods for chemical analysis of tin concentrates - Determination of lead content - Flameatomic absorption spectrometric method and EDTA titrimetric method GB/T 1819.5 Methods for chemical analysis of tin concentrates - Determination of arsenic content - The molybdoantimonyarsenate blue spectrophotometric method and the distillation-iodimetric titrimetric method GB/T 1819.17 Methods for chemical analysis of tin concentrates - Part 17: Determination of mercury content - Atomic fluorescence spectrometric method GB/T 3884.5 Methods for chemical analysis of copper concentrates - Part 5: Determination of fluoride content - Ion selective electrode method GB/T 3884.6 Methods for chemical analysis of copper concentrates - Part 6: Determination of lead, zinc, cadmium and nickel content - Flame atomic absorption spectrometry method GB/T 3884.7 Methods for chemical analysis of copper concentrates - Part 7: Determination of lead content - Na2EDTA titration method GB/T 3884.9 Methods for chemical analysis of copper concentrates - Part 9: Determination of arsenic and bismuth contents - Hydride generation- atomic fluorescence spectrometry method - The potassium bromate titration method and The silver diethyl dithiocarbamate photometric method GB/T 3884.11 Methods for chemical analysis of copper concentrates - Determination of mercury content - Cold atomic absorption spectrometric method GB/T 8151.7 Methods for chemical analysis of zinc concentrates - Part 7: Determination of arsenic content - Hydride generation-atomic fluorescence spectrometry and the potassium bromate titrimetric method GB/T 8151.8 Methods for chemical analysis of zinc concentrates - Part 8: Determination of cadmium content - The flame atomic absorption spectrometric method GB/T 8151.15 Methods for chemical analysis of zinc concentrates - Determination of mercury content - Atomic fluorescence spectrometry method GB/T 8151.21 Methods for chemical analysis of zinc concentrates - Part 21: Determination of thallium content - Inductively coupled plasma mass spectrometry and inductively coupled plasma-atomic emission spectrometry GB/T 8152.5 Methods for chemical analysis of lead concentrates - Determination of arsenic content - Atomic fluorescence spectrometer method GB/T 8152.11 Methods for chemical analysis of lead concentrates - Part 11: Determination of mercury content - Atomic fluorescence spectrometry and direct mercury determining with solid injection method GB/T 8152.12 Methods for chemical analysis of lead concentrates - Determination of cadmium content - Flame atomic absorption spectrometric method GB/T 8152.13 Methods for chemical analysis of lead concentrates - Part 13: Determination of thallium content - Inductively coupled plasma mass spectrometry and inductively coupled plasma-atomic emission spectrometry YS/T 301 Cobalt concentrates YS/T 318 Copper concentrate YS/T 319 Lead concentrate YS/T 320 Zinc concentrate YS/T 339 Tin concentrate YS/T 340 Nickel concentrate YS/T 385 Antimony concentrate YS/T 452 Lead and zinc bulk concentrate YS/T 461.4 Methods for chemical analysis of lead and zinc bulk concentrates - Part 4: The determination of arsenic content - Iodimetricic method YS/T 461.6 Methods for chemical analysis of lead and zinc bulk concentrates - Part 6: The determination of mercury content - Atomic fluorescence spectrometry YS/T 461.7 Methods for chemical analysis of lead and zinc bulk concentrates - Part 7: The determination of cadmium content - Flame atomic absorption spectrometry YS/T 461.12 Methods for chemical analysis of lead and zinc bulk concentrates - Part 12: Determination of thallium content - Inductively coupled plasma mass spectrometry and inductively coupled plasma atomic emission spectrometry YS/T 472 (all parts) Methods for chemical analysis of nickel concentrates and cobalt sulfide concentrates YS/T 556.2 Methods for chemical analysis of antimony concentrates - Part 2: Determination of arsenic content - Potassium bromate titration method YS/T 556.7 Methods for chemical analysis of antimony concentrates - Part 7: Determination of mercury content - Atomic fluorescence spectrometry YS/T 556.11 Methods for chemical analysis of antimony concentrates - Part 11: Determination of cadmium content - Flame atomic absorption spectrometric method 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 heavy nonferrous metal concentrates products general term for heavy metal concentrates in nonferrous metals Note: Generally including copper concentrate, lead concentrate, zinc concentrate, lead and zinc bulk concentrate, tin concentrate, nickel concentrate, cobalt concentrate, antimony concentrate, etc. 3.2 harmful element element with obvious toxicity to human body and obvious pollution to the environment Note: Such as lead, mercury, cadmium, arsenic, thallium, fluorine, etc. 3.3 copper concentrate concentrate product obtained from copper-bearing ore through flotation or alternative beneficiation processes, with a copper content of not less than 13%, designed for copper smelting applications 3.4 lead concentrate concentrate product obtained from lead-bearing ore through flotation or alternative beneficiation processes, with a lead content of not less than 40%, designed for lead smelting applications 3.5 zinc concentrate concentrate product obtained from zinc-bearing ore through flotation or alternative beneficiation processes, with a zinc content of not less than 40%, designed for zinc smelting applications 3.6 lead and zinc bulk concentrate concentrate product obtained from lead-zinc ore through flotation or alternative beneficiation processes, with a lead content of not less than 14%, zinc content of not less than 28%, total lead and zinc content of not less than 45%, and particle size of not more than 0.1 mm, designed for simultaneous lead-zinc smelting applications 3.7 tin concentrate concentrate product obtained from tin containing ore through flotation or alternative beneficiation processes, with a tin content of not less than 40%, a particle size of not more than 3mm, and a particle size less than 0.074 mm of not more than 30%, designed for tin smelting applications 3.8 nickel concentrate concentrate product obtained from nickel containing ore through flotation or alternative beneficiation processes, with a nickel content of not less than 5.0% and a particle size of not less than 0.074 mm of not less than 80%, designed for nickel smelting applications 3.9 cobalt concentrate concentrate product obtained from cobalt containing ore through flotation or alternative beneficiation processes, with a cobalt content of not less than 5.0% and a particle size of not more than 0.175 mm, designed for cobalt smelting applications 3.10 antimony concentrate concentrate product obtained from antimony containing ore through flotation or alternative beneficiation processes, with an antimony content of not less than 20%, a fine concentrate particle size less than 0.074 mm of more than 60%, and a block concentrate particle size ranging from 25 mm to 150 mm, designed for antimony smelting applications

Contents of GB/T 20424-2025

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Limit requirements 5 Test methods 6 Inspection rules