GB 21350-2023The norm of energy consumption per unit production of wrought copper and copper alloy (English PDF)

6.1 General rules

6.1.1 For comprehensive enterprises, assessments shall be conducted separately by varieties [ingot (billet), tube, bar, wire, sheet, strip, foil, copper drawing stock for electrical purposes].

6.1.2 Enterprises that only produce a single type of product, or in which the output of a certain type of product exceeds 80% of the total product output, will be assessed based on the comprehensive energy consumption for unit output of that type of product.

6.1.3 Manufacturing enterprises with only melting and casting procedures or processing procedures shall be assessed based on the unit energy consumption of the melting and casting procedures or processing procedures; manufacturing enterprises with BOTH melting and casting procedures AND processing procedures shall be assessed based on the comprehensive energy consumption for unit output of this product in whole procedures.

6.2 Copper and copper alloy tubes

6.2.1 The allowance of energy consumption per unit throughput of existing copper and copper alloy tube processing enterprises shall comply with Level 3 in Table 2.

6.2.2 The access value of energy consumption per unit throughput of newly built, renovated, and expanded copper and copper alloy tube processing enterprises shall comply with Level 2 in Table 2.

6.3 Copper and copper alloy bars and wires

6.3.1 The allowance energy consumption per unit throughput of existing copper and copper alloy bar processing enterprises shall comply with Level 3 in Table 3 and Table 5. The allowance energy consumption per unit throughput of existing copper and copper alloy wire processing enterprises shall comply with Level 3 in Table 4 and Table 6.

6.3.2 The access value of energy consumption per unit throughput of newly built, renovated, and expanded copper and copper alloy bar processing enterprises shall comply with Level 2 in Table 3 and Table 5. The access value of energy consumption per unit throughput of newly built, renovated, and expanded copper and copper alloy wire processing enterprises shall comply with Level 2 in Table 4 and Table 6.

6.4 Copper and copper alloy sheets, strips, and foils

6.4.1 The allowance of energy consumption per unit throughput of existing copper and copper alloy sheet, strip, and foil processing enterprises shall comply with Level 3 in Table 7, Table 8, and Table 9.

6.4.2 The access value of energy consumption per unit throughput of newly built, renovated, and expanded copper and copper alloy sheet, strip and foil processing enterprises shall comply with Level 2 in Table 7, Table 8, and Table 9.

6.5 Copper drawing stocks for electrical purposes

6.5.1 The allowance of energy consumption per unit throughput of existing Copper Drawing Stock for Electrical Purposes processing enterprises shall comply with Level 3 in Table 10.

6.5.2 The access value of energy consumption per unit throughput of newly built, renovated, and expanded Copper Drawing Stock for Electrical Purposes processing enterprises shall comply with Level 2 in Table 10.

7.1.1 Production system

7.1.1.1 Tubes, bars, wires, sheets, strips and foils 7.1.1.1.1 Melting and casting procedures Energy consumption from the preparation of raw materials to the output of qualified ingots (billets), including various energy consumption by production systems such as batching (including the master alloy), melting, and casting. 7.1.1.1.2 Processing procedures Energy consumption from the beginning of ingot (billet) casting to the output of qualified wrought products and warehousing of the finished products. For tubes, bars and wires, the amount of various energy consumed by production systems such as ingot (billet) heating, extrusion, sawing, rolling, head making, continuous extrusion, drawing, forming, finishing, straightening and sizing, annealing, and packaging is included. For sheets, strips and foils, the amount of various energy consumed by production systems such as ingot (billet) heating, hot rolling, shearing (sawing), cold rolling, shape control (sizing), annealing, and packaging is included.

7.1.1.2 Copper drawing stocks for electrical purposes 7.1.1.2.1 Upward continuous casting method Energy consumption by production systems from when the cathode copper is put into the furnace to when qualified drawing stocks are produced and moved into the finished product warehouse. 7.1.1.2.2 Continuous casting and rolling method Energy consumption by production systems from when cathode copper (or secondary copper) is put into the shaft furnace (or reverberatory furnace) to when qualified drawing stocks are produced and moved into the finished product warehouse.

7.1.2 Auxiliary production system The amount of energy consumed by equipment and facilities required to assist the production of wrought copper and copper alloy products, including energy consumed by wind, oil, water, gas, oxygen and other systems required for production, dust collection and smoke treatment equipment, instrumentation and environmental protection facilities, workshop lighting, and internal transportation.

7.1.3 Affiliated production systems The amount of energy consumed by equipment and facilities required to provide services in the production process, including energy consumed by factory lighting, administrative management, physical and chemical testing, tool and mold manufacturing, maintenance, factory canteens, etc., but excluding household energy consumption and energy consumption by approved infrastructure (technical transformation) project. NOTE: Household energy consumption refers to the energy consumed by dormitories, schools, culture and entertainment, medical care, business services, and childcare and early childhood education within the enterprise system.

7.1.4 Energy consumption apportionment and conversion When calculating the energy consumption of production, auxiliary production, and affiliated production systems, if the same process route produces multiple types of products or the same variety of products is produced by multiple process routes, the total energy consumption of the production, auxiliary production, and affiliated production systems shall be apportioned and converted according to the output and the production difficulty of the product.

7.1.5 Energy consumption of waste heat utilization The energy used by the waste heat utilization device shall be included in the energy consumption. The part of energy recovered for self-use shall be included in the energy consumption of the self-use process; the recovered energy shall be deducted if it is supplied externally or used for other non-production purposes; if it is transferred to other processes, it shall be included in the energy consumption of the accepting process (including transfer losses). The waste heat recovered by enterprises shall be counted according to the waste heat such as steam and hot water recovered and utilized during the statistical period or the energy converted through waste heat processing to avoid repeated statistics.