Detail of GB/T 39733-2020

Introduction of GB/T 39733-2020

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 was proposed by China Iron and Steel Association. This standard is under the jurisdiction of National Technical Committee on Pig Iron and Iron Alloy of Standardization Administration of China (SAC/TC 318). Recycling iron-steel materials 1 Scope This standard specifies the classification, technical requirements, inspection methods, acceptance rules, transportation and quality certificate of recycling iron-steel materials. This standard is applicable to recycling iron-steel materials used as iron furnace burden materials in iron-making, steel-making, casting and iron alloy smelting. 2 Normative references The following 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 5085.1 Identification standards for hazardous wastes - Identification for corrosivity GB 5085.2 Identification standards for hazardous wastes - Screening test for acute toxicity GB 5085.3 Identification standards for hazardous wastes - Identification for extraction toxicity GB 5085.4 Identification standards for hazardous wastes - Identification for ignitability GB.5085.5 Identification standards for hazardous wastes - Identification for reactivity GB 5085.6 Identification standards for hazardous wastes - Identification for toxic substance content GB/T 5202 Radiation protection instrumentation - Alpha, beta and alpha/beta (beta energy >60keV) contamination meters and monitors GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values GB 18871 Basic standards for protection against ionizing radiation and for the safety of radiation sources GB/T 12162.3 X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy - Part 3: Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 recycling raw materials iron-steel products or scraps that have lost their original use value or have been abandoned although have not lost their use value 3.2 recycling iron-steel materials furnace burden which is obtained through the classification and processing of recycling raw materials and may be directly put into a furnace for use as iron 3.3 radioactive materials radioactive substances or radioactive sources contained in recycling iron-steel materials 3.4 explosive materials materials carried by recycling iron-steel materials, such as weapons, ammunition, inflammable and explosive materials, explosives, etc. 3.5 carried-waste non-metallic substances mixed into recycling iron-steel materials in the process of production, collection, packaging and transportation, including wood waste, waste paper, waste plastics, waste rubber, waste glass, stones and powdery substances with a particle size of not greater than 2mm (such as dust, sludge, sawdust, fiber dust, etc.), but excluding packaging materials and other substances used in transportation 3.6 bulk density mass of recycling iron-steel materials per cubic meter 3.7 size physical dimensions of recycling iron-steel materials, i.e. length, width, height, thickness or diameter Note: Generally, the unit of measurement is millimeters. 3.8 dismantling processing which is used to decompose the recycled iron-steel products such as machinery and equipment, building materials and steel structures into a certain size, so that the recycling iron-steel materials are suitable for transportation, production and use 3.9 sorting process of classifying, screening and separating the recycled iron-steel products from other substances according to the requirements of chemical composition, size and use to become a specific category of recycling iron-steel materials 3.10 cutting processing of cutting or shearing the recycled iron-steel products to become recycling iron-steel materials with size meeting requirements 3.11 shredding processing of recycled iron-steel products into shredded recycling iron-steel materials by professional equipment 3.12 bundling processing of pressing and molding the recycled iron-steel products into bundled recycling iron-steel materials by professional equipment 4 Classification 4.1 Category and code Recycling iron-steel materials may be classified into seven categories according to their shapes and chemical compositions through different processing methods, i.e. heavy recycling iron-steel materials, medium recycling iron-steel materials, light recycling iron-steel materials, shredded recycling iron-steel materials, bundled recycling iron-steel materials, alloy recycling iron-steel materials and cast recycling iron-steel materials. See Table A for category, code and designation of recycling iron-steel materials, and see Annex A for typical photos. Table 1 Category, code and designation of recycling iron-steel materials Category Abbreviation Code Designation heavy recycling iron-steel materials HRS 101 HRS101 102 HRS102 medium recycling iron-steel materials MRS 201 MRS201 202 MRS202 light recycling iron-steel materials LRS 301 LRS301 302 LRS302 303 LRS303 shredded recycling iron-steel materials SRS 401 SRS401 402 SRS402 403 SRS403 bundled recycling iron-steel materials BRS 501 BRS501 502 BRS502 503 BRS503 alloy recycling iron-steel materials ARS 601 ARS601 602 ARS602 603 ARS603 cast recycling iron-steel materials CRS 701 CRS701 702 CRS702 4.2 Classification requirements See Table 2 for classification requirements of recycling iron-steel materials, and see Annex B for characteristic attributes. Table 2 Classification requirements of recycling iron-steel materials Category Designation Size Material source and typical example Main processing method General source Typical example Heavy recycling iron-steel materials HRS101 1. Size: solids with a thickness ≥6.0mm or a diameter ≥10mm, a length ≤1,500mm, a width ≤600mm; 2. Unit weight ≤1,500kg Solids with a thickness of greater than 6.0mm or a diameter of greater than 10mm, and iron-steel products decommissioned after a certain service life: 1) various scrapped large equipment; 2) scrapped railway equipment and materials; 3) various scrapped large steel structures; 4) various scrapped large ships, etc. 1. Large machine tools, industrial and mining machinery, etc.; 2. Various large parts and components, steel castings, etc.; 3. Railway components such as rails, wheels, axles, carriages and guide rails; 4. Various steel structures, steel pipes, profile steel, plates and worn steels; 5. Various worn steel plates, profile steel, pipes, machine parts and components, etc. produced by ship dismantling or maintenance Sorting, dismantling and cutting HRS102 Solids with a thickness of greater than 6.0mm or a diameter of greater than 10mm, leftover or tailings formed during production or processing: 1) cutting heads and tails, defective products and degraded products generated during steel production; 2) leftover or tailings formed in the processing of various steels 1. Cutting heads and tails of steel ingot or billet; 2. Defective steel billet; 3. Cutting edge, head and tail during steel plate rolling; 4. Leftover or tailings generated in the processing of various steels (profile steel, round steel, angle steel, steel plate, etc.); 5. Leftover or tailings generated after stamping of steel plate Sorting and cutting Medium recycling iron-steel materials MRS201 1. Size: solids with a thickness ≥4.0mm or a diameter ≥8mm, a length ≤1,500mm, a width ≤600mm; 2. Unit weight ≤1,500kg Solids with a thickness of greater than 4.0mm or a diameter of greater than 8mm, and iron-steel products decommissioned after a certain service life: 1) various scrapped small and medium equipment; 2) various scrapped medium steel structures; 3) various scrapped small and medium ships, etc. 1. Small and medium machine tools, industrial and mining machinery, etc.; 2. Various small and medium parts and components, steel castings, etc.; 3. Various small and medium steel structures, steel pipes, profile steel, plates and worn steels; 4. Various worn steel plates, profile steel, pipes, machine parts and components, etc. produced by dismantling or maintenance of small and medium ships Sorting, dismantling and cutting MRS202 Solids with a thickness of greater than 4.0mm or a diameter of greater than 8mm; various leftover or tailings formed during the processing of various steels 1. Leftover or tailings generated in the processing of various steels (profile steel, round steel, angle steel, steel plate, etc.); 2. Leftover or tailings generated after stamping of steel plate Sorting and cutting Light recycling iron-steel materials LRS301 1. Size: thickness ≥2.0mm; length ≤1,500mm; width ≤600mm; 2. Unit weight ≤1,500kg Iron-steel products with a thickness of greater than 2.0mm and decommissioned after a certain service life: 1) various scrapped small equipment; 2) various scrapped small motor vehicles or electric vehicle frames 1. Various scrapped small equipment, such as machine tools and machines; 2. Various scrapped parts and components, etc.; 3. Various motorcycle frames, electromobile frames, bicycle frames, electric vehicle frames, etc.; 4. Iron cores dismantled from various light-weight steel, household hardware and generators; 5. Various worn steel plates, profile steel, pipes, machine parts and components, etc. produced by ship dismantling or maintenance Sorting, dismantling and cutting LRS302 Various leftover or tailings with a thickness of greater than 2.0mm formed during the processing of various steels 1. Leftover or tailings generated in the processing of various steels (profile steel, round steel, angle steel, steel plate, etc.); 2. Leftover or tailings of silicon steel sheet; 3. Leftover or tailings generated after stamping of steel plate Sorting and cutting LRS303 1. Size: thickness ≤2.0mm; length ≤1,500mm; width ≤600mm; 2. Unit weight ≤1,500kg New materials with a thickness of less than 2.0mm formed during the processing of various steels Leftover or tailings generated during the processing of automobile sheet and household appliance plates, etc. Sorting and cutting Shredded recycling iron-steel materials SRS401 Bulk density: ≥0.8t/m3, as agreed by the supplier and the demander Recycled automobile dismantling materials Automobile disassembling materials Sorting, disassembling and shredding SRS402 Use small or other recycled materials with a thickness of less than 2.0mm as raw materials 1. Recycled household appliances; 2. Machine parts; 3. Various small equipment; 4. Coated steel plates, color steel tiles, etc. Sorting and shredding SRS403 Industrial processing leftover 1. Leftover or tailings generated by automobile sheet processing; 2. Leftover or tailings generated by other single plates such as household appliances plates Sorting and shredding Bundled recycling iron-steel materials BRS501 1. Size: length ≤1,500mm; width ≤1,000mm; height ≤1,000mm; 2. Unit weight ≤2,000kg Use leftover or tailings generated by processing of automobile sheet or other plates 1. Leftover or tailings generated after stamping of automobile sheets 2. Leftover of household appliances plates; 3. Leftover or tailings of silicon steel sheet; 4. Leftover or tailings of other processed products Sorting and bundling BRS502 Recycled worn steel bars (threads, wires) Bundle and mold the recycled worn steel bars (screw-thread steel and wire) Sorting and bundling BRS503 Steel shavings and chips produced during steel machining Steel shavings, chips, etc. produced during steel machining Bundling and bagging Alloy recycling iron-steel materials ARS601 Nickel-chromium stainless steel recycled parts or processing leftover with a nickel (Ni) content of not less than 7.0% 1. Nickel-chromium stainless steel recycled parts, such as recycled stainless steel parts in machines, equipment, instruments and structural parts; 2. Leftover or tailings formed during the processing of nickel-chromium stainless steel; 3. Various nickel-chromium stainless steel plates, pipes and machine parts and components, etc. produced by ship dismantling or maintenance Sorting, cutting and bundling ARS602 1. Size: length ≤1,500mm; width ≤1,000mm; 2. Unit weight ≤1,500kg Chromium stainless steel recycled parts or processing leftover, with a chromium (Cr) content of not less than 11.5% 1. Chromium stainless steel recycled parts, such as recycled stainless steel parts of machines, equipment, instruments, structural parts, etc.; 2. Leftover or tailings formed during the processing of chromium stainless steel Sorting, cutting and bundling ARS603 Use recycled alloy steel as raw materials: 1) out-of-service recycled parts, such as tool steel, die steel, bearing steel, gear steel, high temperature alloy, etc.; 2) leftover bits and pieces generated during processing; 3) shavings and alloy steel scraps produced by machining 1. Use tool steel, die steel, bearing steel, gear steel, high temperature alloy, etc. as raw materials; 2. Leftover or tailings generated by alloy steel processing Sorting, cutting, bundling and bagging Cast recycling iron-steel materials CRS701 1. Size: thickness ≥2.0mm; length ≤1,500mm; width ≤600mm; 2. Unit weight ≤1,500kg Cast iron products with a thickness of greater than 2.0mm and decommissioned after a certain service life: 1) various recycled cast iron equipment; 2) various recycled small cast iron products 1. Various recycled small cast iron equipment; 2. Various recycled cast iron parts and components; 3. Various recycled small cast iron products, etc. Sorting, dismantling and cutting CRS702 Various leftover or tailings with a thickness of greater than 2.0mm formed during processing of cast iron parts Leftover or tailings produced after casting production and processing Sorting and cutting 4.3 Processing method See Figures 1~7 for the processing flow diagrams of different categories of recycling iron-steel materials. Figure 1 Schematic diagram for processing classification of heavy recycling iron-steel materials Figure 2 Schematic diagram for processing classification of medium recycling iron-steel materials Figure 3 Schematic diagram for processing classification of light recycling iron-steel materials Figure 4 Schematic diagram for processing classification of shredded recycling iron-steel materials Figure 5 Schematic diagram for processing classification of bundled recycling iron-steel materials Figure 6 Schematic diagram for processing classification of alloy recycling iron-steel materials Figure 7 Schematic diagram for processing classification of cast recycling iron-steel materials 5 Technical requirements 5.1 Storage requirements Recycling iron-steel materials shall be stored in different categories. 5.2 Radioactive materials The control of radioactive materials shall meet the following requirements: a) the radioactive materials shall not be mixed with radioactive substances; b) the penetrating radiation dose rate from external exposure of materials (including packaging materials) shall not exceed the local normal natural radiation background value +0.25μGy/h; c) the α or β radioactive contamination level on the material surface are as follows: the mean value of the maximum detection level of 300cm2 in any part of the surface does not exceed 0.04Bq/cm2 for α, and not exceed 0.4Bq/cm2 for β. 5.3 Explosive materials Recycling iron-steel materials shall not be mixed with explosive materials. 5.4 Hazardous waste The mixing of the following hazardous wastes in recycling iron-steel materials shall be strictly limited: a) wastes specified in National catalogue of hazardous wastes; b) other hazardous wastes with one or more dangerous characteristics such as corrosivity, toxicity, ignitability and reactivity through identification according to GB 5085.1~GB 5085.6. The mass of hazardous wastes in recycling iron-steel materials shall not exceed 0.01% of the total mass.

Contents of GB/T 39733-2020

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Classification 5 Technical requirements 6 Inspection methods 7 Acceptance rules 8 Transportation and quality certificate Annex A (Informative) Typical photos of recycling iron-steel materials Annex B (Informative) Characteristic attribute of recycling iron-steel materials Annex C (Normative) Radioactive materials inspection method Annex D (Informative) Standard for analytical methods of iron-steel products Bibliography