Detail of AQ 2001-2018

Introduction of AQ 2001-2018

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. All technical contents of this standard are compulsory. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard replaces AQ 2001-2004 Safety regulations for steel-making. The following main technical changes have been made with respect to AQ 2001-2004: ——the structural order of the standard has been adjusted; ——the relevant safety requirements of GB/T 33000 have been added; ——the requirements for safety detection and monitoring measures of converter gas area have been added; ——the requirement that the personnel gathering places shall not be within the influence range of lifting high-temperature liquid metal has been added; ——some requirements for arrangement of oil supply station and acetylene gas station have been deleted; ——the grounding protection requirements for devices such as gas purification stations have been added; ——the requirement that the crane for lifting oxygen lance and sub-lance in the high-rise frame of converter shall be operated by wireless remote control and wire control operation board instead of the driver in the cab has been added; and ——the requirement that effective ventilation measures shall be taken when entering the space with nitrogen sealing equipment (e.g. silo) has been added. This standard was proposed by the original Fourth Division of the State Administration of Work Safety. This standard is under the jurisdiction of the Subcommittee on Metallurgical Nonferrous Safety of the National Technical Committee on Safety Production of Standardization Administration of China (SAC/TC 288/SC 8). Safety regulations for steel-making 1 Scope This standard specifies the technical requirements for safety production of steel-making. This standard is applicable to the design, equipment manufacturing, construction and installation, production and equipment overhaul of steel-making plant. 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 (including any amendments) applies. GB 2894 Safety signs and guideline for the use GB 4053.1 Safety requirements for fixed steel ladders and platform - Part 1: Steel vertical ladders GB 4053.2 Safety requirements for fixed steel ladders and platform - Part 2: Steel inclined ladders GB 4053.3 Safety requirements for fixed steel ladders and platform - Part 3: Industrial guardrails and steel platform GB 4387 Safety regulation for railway and road transportation in plants of industrial enterprises GB/T 5082 The commanding signal for lifting and moving GB 5768.2 Road traffic signs and markings - Part 2: Road traffic signs GB 5768.3 Road traffic signs and markings - Part 3: Road traffic markings GB/T 5972 Cranes - Wire ropes - Care, maintenance, installation, examination and discard GB/T 6067.1 Safety rules for lifting appliances - Part 1: General GB 6222 Safety code for gas of industrial enterprises GB 6722 Safety regulations for blasting GB 7231 Basic identification colors and code indications and safety sign for industrial pipelines GB 14784 Safety regulations of belt conveyor GB 16912 Safety technical regulation for oxygen and relative gases produced with cryogenic method GB/T 20801.6 Pressure piping code - Industrial piping - Part 6: Safeguarding GB 28664 Emission standard of air pollutants for steel smelt industry GB/T 29639 Guidelines for enterprises to develop emergency response plan for work place accidents GB/T 33000 Guideline of China occupational safety and health management system GB 50016 Code for fire protection design of buildings GB 50030 Code for design of oxygen station GB 50034 Standard for lighting design of buildings GB 50057 Code for design protection of structures against lightning GB 50058 Code for design of electrical installations in explosive atmospheres GB 50140 Code for design of extinguisher distribution in buildings GB 50184 Code for acceptance of construction quality of industrial metallic piping GB 50235 Code for construction of industrial metallic piping engineering GB 50236 Code for construction of field equipment, industrial pipe welding engineering GB 50316 Design code for industrial metallic piping GB 50683 Code for construction of field equipment, industrial pipe welding engineering GB 50414 Code of design on fire protection and prevention for iron & steel metallurgy enterprises GB 50439 Code for design of steelmaking engineering GB 50603 Code for design of general layout and transportation for iron & steel enterprise GBJ 22 Specifications for the design of factory and mine roads GBZ/T 205 Specification of prevention and control on occupational hazards in confined space DL 408 Rules of safe operation in power industry TSG D0001 Pressure pipe safety technology supervision regulation for industrial pressure pipe 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 shaft furnace ultra-high power electric arc furnace with a shaft on its cover, where the scrap steel is preheated in the shaft by high-temperature waste gas discharged from the electric arc furnace 3.2 PLUS2000 furnace ultra-high power electric arc furnace with a scrap steel basket rotating device, which preheats the scrap steel by its own high-temperature waste gas 3.3 CONSTEEL furnace ultra-high power electric arc furnace in which scrap steel is continuously added through a conveyor belt and preheated by its own high-temperature waste gas 3.4 Korfarc furnace ultra-high power electric arc furnace with several oxygen lance burners and submerged tuyeres on the furnace wall, which saves electric energy by using chemical energy and post-combustion technology 3.5 vacuum degassing, VD vacuum degassing device for molten steel, in which a ladle filled with molten steel is placed in a closed vacuum tank connected with a vacuum pump, argon gas is introduced from the bottom of the ladle to stir the molten steel, so that the molten steel undergoes degassing reaction in a vacuum state 3.6 vacuum oxygen decarburization, VOD vacuum oxygen decarburization refining device mainly used for refining stainless steel, of which an oxygen lance is arranged on the vacuum tank cover of VD to blow oxygen to the molten steel surface in the vacuum tank, and the chromium-containing molten steel undergoes "decarburization and chromium preservation" refining in a vacuum state, which can also be used for smelting ultra-low carbon steel 3.7 composition adjustments by scaled argon bubbling with oxygen blowing, CAS-OB device for heating molten steel in a ladle by utilizing oxidation heat generated by metal (aluminum) combustion, or for adjusting the composition of molten steel by adding alloy in immersion hood 3.8 injection refining-up temperature, IR-UT device which can not only carry out injection desulphurization refining for molten steel under normal pressure, but also raise the temperature by blowing oxygen and adding aluminum, and of which, a powder spray gun is inserted into molten steel in the immersion hood, so as to spray desulfurizer into molten steel 3.9 ruhrstahl-heraeus process, RH refining method for vacuum circulating degassing of molten steel, in which, two circulating tubes (immersion tubes) at the bottom of the vacuum chamber are inserted into molten steel to make the molten steel continuously flow into the vacuum chamber from the ascending tube (with argon as the lifting gas) following the principle of bubble pump, and then flow back to the ladle from the descending tube, thus forming a circulating flow 3.10 ruhrstahl-heraeusdegassr-top blowing, RH-TB method of refining ultra-low carbon steel and stainless steel by inserting an oxygen lance at the top of RH vacuum tank and blowing oxygen to molten steel for decarburization 3.11 ladle furnace, LF device for blowing argon from the bottom of ladle under normal pressure and heating the molten steel by electric arc to refine molten steel and homogenize its composition and temperature 3.12 argon oxygen decarburization, AOD decarburization refining furnace in which oxygen and argon (in different proportions) are blown into molten steel from the side of molten steel pool of converter, mainly used for smelting stainless steel 4 Safety management 4.1 The safety production management of steel-making enterprises shall meet the relevant requirements of GB/T 33000. 4.2 Safety facilities of constructed, extended and renovated projects shall be designed, constructed and put into production or use simultaneously with the main part of the project. Investment in safety facilities shall be incorporated into the budgetary estimate of the whole construction project. In the feasibility study stage of the project, an evaluation institution with corresponding qualification shall be entrusted to carry out safety pre-evaluation. 4.3 The preliminary design documents of the construction project shall include Safety Facility Design. The safety facility design shall run through the design of various specialties and be submitted for review according to relevant requirements. 4.4 The construction of the construction project shall be carried out according to the design. The change of safety facility shall be approved in writing by the design organization. The concealed part of the project can be concealed only after being approved through checking and signing by the design organization, development organization, supervision organization and construction organization. After the completion of the construction, the construction organization shall deliver the completion instructions and as-built drawings to the development organization. 4.5 The construction project, after being completed, shall be put into trial run before normal production or use.

Contents of AQ 2001-2018

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Safety management 5 Location and layout of plant (workshop) 5.1 Location of plant (workshop) 5.2 Layout of plant (workshop) 6 Plant building and its internal buildings (structures) 6.1 Plant building 6.2 Buildings (structures) 7 Raw materials 7.1 Bulk material 7.2 Scrap steel 7.3 Molten iron storage, transportation and pretreatment facilities 8 Steel-making equipment 8.1 Molten iron tanks, molten steel tanks, intermediate tanks, slag tanks (pots) 8.2 Baking devices and other burners for molten iron tanks, molten steel tanks and intermediate tanks 8.3 Ground vehicles 8.4 Lifting equipment 8.5 External transporting equipment 8.6 Other equipment 9 Oxygen converter 9.1 Equipment and related facilities 9.2 Production operation 10 Electric furnace 10.1 Equipment and related facilities 10.2 Production operation 11 Secondary refining 11.1 Equipment and related facilities 11.2 Production operation 12 Molten steel pouring 12.1 Preparation of molten steel tank and intermediate tank 12.2 Molding 12.3 Continuous casting 12.4 Ingot (billet) treatment 13 Power supply and pipeline 13.1 Power supply and electrical equipment 13.2 Power pipeline 13.3 Oxygen 13.4 Gas 13.5 Water supply and drainage 14 Slag 15 Overhaul 15.1 Dismantling of furnace 15.2 Requirements for construction area of furnace repair operation 15.3 Repair of converter 15.4 Repair of electric furnace 15.5 Others 16 Lighting