Standard No.:	GB/T 45436-2025
English Name:	Code for technical upgrading of EAF process and equipment
Chinese Name:	电炉工艺及装备技术改造规范
Chinese Classification:	H04    Basic standards and general methods
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2025-03-28
Implemented on:	2025-10-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	6000 words
Translation Price(USD):	180.0
Delivery:	via email in 1 business day

GB/T 45436-2025 Code for technical upgrading of EAF process and equipment 1 Scope This document stipulates the process flow and smelting furnace types, technical upgrading requirements, safety and environmental protection transformation, commissioning, operation and maintenance for the technological transformation of electric furnace processes and equipment. This document is applicable to the technical upgrading and acceptance of processes and equipment for AC electric arc furnaces. Reference may be made for new electric arc furnaces. 2 Normative references The following referenced documents are indispensable for the application 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 2900.23 Electrotechnical terminology - Industrial electroheat GB/T 4223 Waste steel GB/T 10067.21 Basic specifications for electroheat installations - Part 21: Large capacity electric arc furnace using alternating current GB/T 12325 Power quality - Deviation of supply voltage GB/T 12326 Power quality - Voltage fluctuation and flicker GB/T 14549 Quality of electric energy supply - Harmonics in public supply network GB/T 15543 Power quality - Three-phase voltage unbalance GB/T 15945 Power quality - Frequency deviation for power system GB 18599 Standard for pollution control on the non-hazardous industrial solid waste storage and landfill GB/T 24337 Power quality - Interharmonics in public supply network GB 28664 Emission standard of air pollutants for steel smelt industry GB 32050 Norm of energy consumption per unit product of steel making electric arc furnace GB/T 41994 Industrial furnace and associated processing equipment - Safety requirements for machinery and equipment for production of steel by electric arc furnaces GB 50439 Code for design of steelmaking engineering HJ 435 Dedusting engineering technical specification of iron and steel industry JB/T 9640 Arc furnace transformer NB/T 41007 Power supply technical guidelines for AC electric arc furnace - Design of power supply YB/T 4170 Direct reduced iron for steelmaking YB/T 4978 Technical specification for ventilation and dedusting of flue gas from steelmaking electric furnace YB/T 6042 Technical specification for application of lubricating oil (grease) additives for metallurgy YB/T 6068 Technical specification for oxygen supply for steelmaking in electric arc furnace 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 10067.21 and GB/T 2900.23 apply. 4 Process flow and smelting furnace type 4.1 EAF feeding by unscrewing furnace cover See Figure 1 for the process flow of EAF feeding by unscrewing furnace cover. This type of EAF equipment is flexible and easy to operate, and is applicable to diversified scrap steel.

Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Process flow and smelting furnace type 5 Technical upgrading requirements 6 Safety and environmental protection transformation 7 Commissioning, operation and maintenance Annex A (Informative) Estimation of transformer capacity Bibliography