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Cole for engineering of cold-rolled electrical steel strip plant
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GB/T 50997-2014
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Basic data | Standard ID | GB/T 50997-2014 (GB/T50997-2014) | | Description (Translated English) | Cole for engineering of cold-rolled electrical steel strip plant | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | P73 | | Classification of International Standard | 77.010 | | Word Count Estimation | 105,133 | | Date of Issue | 5/16/2014 | | Date of Implementation | 2/1/2015 | | Quoted Standard | GB 50007; GB 50009; GB 50010; GB 50011; GB 50013; GB 50014; GB 50016; GB 50017; GB 50019; GB 50028; GB 50029; GB/T 50033; GB 50034; GB 50041; GB 50046; GB 50050; GB 50052; GB 50054; GB 50057; GB 50058; GB/T 50065; GB/T 50087; GB 50098; GB 50108; GB/T 5010 | | Regulation (derived from) | Ministry of Housing and Urban-Rural Development Bulletin No. 421 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This standard applies to cold-rolled silicon steel production facilities, public auxiliary facilities, office and living facilities, new construction and renovation project design. | GB/T 50997-2014: Cole for engineering of cold-rolled electrical steel strip plant---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
1 General
1.0.1 In order to standardize the engineering design of cold-rolled electrical steel, achieve advanced technology, reasonable economy, safety and practicality, energy saving and environmental protection, and obtain good economic and social benefits, this specification is formulated.
1.0.2 This code is applicable to the design of new construction and renovation projects of cold-rolled electrical steel production facilities, public and auxiliary facilities, office and living facilities.
1.0.3 The design of the cold-rolled electrical steel section shall not only comply with this code, but also comply with the current relevant national standards.
2 Terms and abbreviations
2.1 Terminology
2.1.1 Electrical steel
Electrical steel is a soft magnetic alloy. It is mainly used in the electrical industry to manufacture transformers, iron cores of motors and other magnetic components.
2.1.2 cold-rolled electrical steel cold-rolled electrical steel
Refers to electrical steel produced from hot-rolled electrical steel coils through pickling, cold rolling, annealing and finishing processes.
2.1.3 cold-rolled grain-oriented electrical steel cold-rolled grain-oriented electrical steel
Refers to the cold-rolled electrical steel with more than 75% of the internal grains as (110)[001]Gauss texture and excellent magnetic properties in the rolling direction.
2.1.4 Highly magnetic induction oriented electrical steel
Refers to the cold-rolled grain-oriented electrical steel whose magnetic polarization J in the rolling direction is above 1.85T (Tesla) when the magnetic field strength H=800A/m.
2.1.5 cold-rolled non-oriented electrical steel cold-rolled non-oriented electrical steel
It refers to the cold-rolled electrical steel whose internal grain orientation is randomly distributed in all directions and whose magnetic properties are uniform in all directions.
2.1.6 high magnetic induction cold-rolled non-oriented electrical steel
Compared with the corresponding grade of common cold-rolled non-oriented electrical steel, the maximum total specific iron loss is equivalent, but the minimum magnetic polarization J at the magnetic field strength H = 5000A/m is 0.02T ~ 0.10T (Tesla) higher Cold-rolled non-oriented electrical steel, which is a material for making high-efficiency iron cores.
2.1.7 normalizing process
Refers to the annealing process of high magnetic permeability grade oriented electrical steel, high magnetic induction cold-rolled non-oriented electrical steel, high-grade and some medium-grade cold-rolled non-oriented electrical steel hot-rolled strips before pickling. Generally, normalization, shot peening and pickling are carried out on the same production line.
2.1.8 pickling process
Refers to the process of removing the oxide scale on the surface of the hot-rolled strip of electrical steel with a certain concentration of hydrochloric acid.
2.1.9 rolling process
Refers to the process of rolling the hot-rolled electrical steel strip from the initial thickness to the intermediate thickness or finished product thickness at a temperature not exceeding 300°C.
2.1.10 Welding and coil welding process
It refers to the process of cutting off the edge cracks generated in the rolling process of the strip, welding the broken strip, and shearing the out-of-tolerance parts at the head and tail.
2.1.11 Intermediate annealing process for cold-rolled electrical steel
It refers to the process of eliminating work hardening, restoring plasticity, and decarburization according to the requirements of the production process for the electrical steel between two rollings.
2.1.12 Continuous decarburizing & annea-ling and insulating film coating
Refers to the process of degreasing, decarburizing annealing and insulating coating on the non-oriented electrical steel after rolling.
2.1.13 Continuous decarburizing annealing and decarburizing & annea-ling and MgO coating
It refers to the process of degreasing, decarburizing annealing and coating magnesium oxide isolation layer on the rolled grain-oriented electrical steel.
2.1.14 Leveling temper process
Refers to the process of improving the flatness and hardness of cold-rolled non-oriented electrical steel after incomplete annealing to improve the punching performance.
2.1.15 high temperature annealing process
Refers to the process of secondary recrystallization and steel purification annealing of cold-rolled oriented electrical steel after continuous decarburization annealing and magnesium oxide coating.
2.1.16 Thermal stretching leveling continuum tension
Refers to the process of pickling, flattening and insulating coating of oriented electrical steel after high temperature annealing.
2.1.17 domain refinement process
Refers to the process of reducing the 180° magnetic domain width by laser irradiation, plasma spraying, mechanical scoring and electrolytic corrosion on high-permeability grade cold-rolled grain-oriented electrical steel, thereby reducing iron loss.
2.1.18 laser scribing laser scribing
Refers to the process of reducing the 180° magnetic domain width by laser irradiation along the direction perpendicular to the rolling direction of high-permeability grade oriented electrical steel to reduce iron loss.
2.1.19 finishing process
Refers to the process of trimming, coiling, slitting, cross-cutting and packaging of cold-rolled electrical steel according to user requirements.
2.1.20 general layout
Refers to the design that reasonably determines the spatial location of buildings, structures and facilities on the site.
2.1.21 plant site selection plant site selection
It refers to the work of selecting a place for the enterprise to be built that can not only meet the production needs, but also obtain the best social and economic benefits.
2.1.22 vertical layout vertical design
Refers to the work of reasonably determining the site elevation of each facility in a cold-rolled electrical steel plant according to the natural conditions of the site and the requirements of the production process.
2.1.23 Integrated pipeline arrangement
Refers to the work of uniformly arranging the direction and spatial location of each pipeline according to the technical requirements of the pipeline and the layout of the cold-rolled electrical steel factory.
2.1.24 acid regeneration plant
Refers to the facility that reacts the waste acid produced by the pickling unit to generate regenerated acid.
2.1.25 basic automation system (L1) basic automation system
Refers to the control system that realizes the collection and processing of on-site data, data exchange, and the execution commands required by the output equipment.
2.1.26 Process automation system (L2) process automation system
Refers to the control system that is responsible for controlling and coordinating production equipment capabilities, realizing direct control of production, and optimizing production process control parameters through data models according to the production targets issued by the manufacturing execution system.
2.1.27 Manufacturing execution system (MES) manufacturing execution sys-tem
Refers to the system that is responsible for coordinating the production between processes or workshops, rationally allocating resources, executing and completing the production tasks assigned by the enterprise management level (ERP), planning and dispatching production for problems that arise in actual production, and managing and controlling product quality.
2.2 Abbreviations
B/S (Browser/Server) browser/server;
C/S (Client/Server) client/server;
D1(Digital 1) Digital TV system 480i display format;
ERP (Enterprise Resource Planning) enterprise resource planning;
IPC (Industrial Personal Computer) industrial computer;
OA (Office Automation) office automation;
QoS (Quality of Service) service quality;
PLC (Programmable Logic Controller) programmable logic controller;
RAID (Redundant Arrays of Independent Disks) disk array;
UPS (Uninterruptble Power Supply) uninterruptible power supply;
VLAN (Virtual Local Area Network) virtual local area network.
3 Basic Regulations
3.0.1 The engineering design of cold-rolled electrical steel should adopt mature and reliable advanced technology, advanced technology and advanced equipment.
3.0.2 The annual output of oriented electrical steel for new cold-rolled electrical steel projects should not be less than 60,000 tons, and the annual output of non-oriented electrical steel should not be less than 100,000 tons. The main technical and economic indicators of new or renovated cold-rolled electrical steel projects shall comply with the relevant provisions of the current national standard "Code for Design of Plate and Strip Rolling Process" GB 50629, and the energy consumption of the process shall comply with the current national standard "Code for Energy-saving Design of Iron and Steel Enterprises" GB 50632 The relevant provisions.
3.0.3 The cold-rolled electrical steel project should adopt a clean production process to improve the utilization rate of resources and energy, and reduce the discharge of waste water, waste gas and solid waste.
3.0.4 The level of the automation control system should meet the requirements of the production process and be compatible with the level of production equipment.
3.0.5 The production of cold-rolled electrical steel should adopt the consistent production quality management technology from ironmaking, steelmaking, continuous casting, hot rolling to cold rolling.
3.0.6 The width of cold-rolled electrical steel for new construction should not be less than 600mm.
4 process and equipment
4.1 General provisions
4.1.1 The selection of production process, process plan and equipment should be determined after technical and economic comparison based on factors such as production scale, product plan, production standard, delivery status, raw material, fuel type and plant construction conditions.
4.1.2 The process layout of the workshop shall be determined according to the production process flow, process plan, equipment selection and general layout, and shall meet the requirements of logistics, operation, maintenance, construction, installation, fire protection and safety.
4.1.3 Process equipment selection should adopt water-saving, energy-saving and environment-friendly production processes and equipment.
4.2 Process flow
4.2.1 The production process of cold-rolled grain-oriented electrical steel should be hot-rolled raw materials → (normalization) → pickling → primary rolling → (welding and coiling) → (intermediate annealing) → (secondary rolling) → (welding and Volume) → continuous decarburization annealing and coating of magnesium oxide → high temperature annealing → thermal stretching leveling (refining magnetic domains) → (laser scoring) → finishing.
4.2.2 The production process of cold-rolled non-oriented electrical steel should be hot-rolled raw materials → (normalization) → pickling → primary rolling → (welding and coiling) → (intermediate annealing) → (secondary rolling) → (welding And roll) → continuous decarburization annealing and coating insulation layer → (leveling) → finishing.
4.3 Process equipment selection
4.3.1 The capabilities of production units in each process should match each other.
4.3.2 The selection of process equipment should comply with the current national standards "Code for Energy-saving Design of Iron and Steel Enterprises" GB 50632, "Code for Water-saving Design of Iron and Steel Enterprises" GB 50506, "Code for Design of Strip Rolling Process" GB 50629, "Code for Strip Finishing Process" Relevant provisions of GB 50713 Design Code and GB 50486 Code for Design of Industrial Furnaces in Iron and Steel Plants.
4.3.3 Second-hand cold-rolled electrical steel production equipment eliminated at home and abroad shall not be used for cold-rolled electrical steel projects.
4.4 Workshop process layout
4.4.1 For the cold-rolled electrical steel project, the workshop process layout should be carried out for the production unit and production auxiliary facilities according to the production process and process plan.
4.4.2 The layout of the workshop should be equipped with pedestrian passages, transportation passages for various equipment, materials and waste materials, as well as operation safety areas, equipment maintenance areas and storage areas for raw materials, intermediate products and finished products.
4.4.3 Production units of the same type should be arranged in the same span or adjacent spans.
4.4.4 The process layout should reduce the transportation frequency and distance of intermediate products.
4.4.5 The distance between the production unit and the production unit, between the production unit and the building should meet the requirements of operation, installation, maintenance and fire protection.
4.4.6 The elevation of the rail surface of the factory building shall meet the production requirements and the maintenance requirements at the highest point of the equipment.
4.4.7 Process layout The process equipment should be arranged within the limit range of the crane hook in the workshop. For the equipment arranged outside the limit range of the crane hook, corresponding inspection beams (or brackets) and inspection hoists should be installed.
4.4.8 Production auxiliary facilities should be close to the production unit.
4.5 Workshop transportation
4.5.1 The steel coil transportation between the upper and lower processes should adopt the direct steel coil transportation device.
4.5.2 Cutting head, tail cutting waste and trimming waste should be directly transported outside the factory building.
4.5.3 The type selection of workshop cranes should meet the following requirements.
1 The span shall be determined according to the span of the factory building and the layout of the pipeline under the crane beam.
2 The quantity should be determined after calculation according to the daily lifting frequency and lifting cycle time.
3 The rated lifting load shall be determined according to the sum of the maximum lifting mass and the mass of the spreader and attachments during normal operation.
4 The working level of the whole machine should be calculated and selected according to the crane's service level and lifting load state level, and should be calculated and selected according to the current national standard "Code for Design of Cranes" GB/T 3811.
5.The work level of the mechanism shall be calculated and selected according to the use level of the mechanism and the load state level of the mechanism, and shall be calculated and selected according to the relevant provisions of the current national standard "Code for Design of Cranes" GB/T 3811.
6 The speed of walking and lifting should be determined according to the purpose of the crane and the frequency of lifting.
7 The lifting stroke should be determined according to the purpose of the crane, and the upper and lower limits should meet the maintenance needs of the highest point equipment and the lowest point equipment in the workshop.
8 The spreader should determine whether to rotate and/or lock according to its lifting task.
9 The type of spreader should be selected according to the type, state and temperature of the lifting goods.
10.The setting of the operating room should be determined according to the equipment layout and the location of the items to be lifted. It can be fixed at one end, fixed in the middle or mobile. When there are multiple cranes in the same span workshop, at least one of the operating rooms of every two adjacent cranes can observe the other crane from the front.
11 The ambient temperature should be determined according to the local meteorological temperature, the heat generated by the unit and the ventilation of the workshop. In the absence of relevant information, the raw material, rolling, finishing and finished product workshops should not be higher than 45°C, and the heat treatment workshop should not be higher than 55°C.
12.Polyurethane buffer should be used for the buffer of the cart.
13 The trolley line should be H-type safe and energy-saving trolley line.
14 The structural form of the main girder should be selected according to the characteristics of the crane and the site conditions.
15 The control method should be the master command control method, and the operation method should be the cab or remote control method according to the site conditions.
16 The anti-collision device of the cart should adopt the infrared deceleration type anti-collision device.
4.5.4 The selection of electric flat car should meet the following requirements.
1 The rated load capacity shall be determined based on the transport mass during normal operation.
2 The quantity should be determined after calculation according to the daily transportation frequency, transportation cycle time, effective operation rate and effective working time.
3 The power supply method should be determined according to the transportation distance, rated load, ambient temperature, transportation frequency and working environment.
4 The gauge should be selected and determined according to the rated load capacity, the gauge of flatbed vehicles on the same track, and the site conditions.
5 The size of the table should be determined according to the size of the goods and the working status.
6 The length of the track should be comprehensively determined according to the distance of the transported items, the size of the table and the convenience of crane lifting.
7.The operation mode should be determined according to the site conditions and the power supply mode of the electric flat car. Remote control, fixed location operation or follow-up operation can be selected.
8 The operating speed should be determined according to the use and transportation frequency of the electric flat car. If there is no relevant information, it can be selected as 30m/min.
4.5.5 The workshop building should be equipped with crane maintenance hoist and maintenance platform.
5 General plan transportation
5.0.1 The transportation of the general plan of cold-rolled electrical steel factories should be combined with the geographical and natural conditions of each cold-rolled electrical steel factory and the overall layout of the enterprise, and should be compact and reasonable, and the process should be smooth.
5.0.2 The site selection of an independent cold-rolled electrical steel factory shall comply with the relevant provisions of the current national standard GB 50603 "Code for Design of General Drawings and Transportation of Iron and Steel Enterprises".
5.0.3 The site selection of the cold-rolled electrical steel plant (workshop) in the iron and steel complex shall meet the following requirements.
1 It should be located on the downwind side of the perennial minimum frequency wind direction in the plant area.
2 There should be convenient conditions for the finished product to be shipped out.
3 It should be close to the hot rolling plant that provides raw materials for it.
5.0.4 The general layout of the cold-rolled electrical steel factory should be based on the production process, so that the flow of logistics, people and media is short and smooth; it is better to separate people and goods.
5.0.5 The safety protection distance between the buildings and structures of the cold-rolled electrical steel factory and between the buildings, structures and railways, roads and pipelines, as well as the anti-vibration and anti-noise distances shall comply with the current national standard "Code for Transportation Design of General Drawings of Iron and Steel Enterprises" "GB 50603, "Code for Fire Protection Design of Iron and Steel Metallurgical Enterprises" GB 50414, "Code for Fire Protection Design of Buildings" GB 50016 and "Environmental Noise Emission Standards for Industrial Enterprises" GB 12348.
5.0.6 For factories constructed in phases, the short-term projects should be arranged in a centralized manner, and the long-term projects should be arranged outside the land for the short-term projects.
5.0.7 The layout of the main building of the cold-rolled electrical steel factory shall meet the following requirements.
1 In mountainous and hilly areas, the longitudinal axis of the main powerhouse should be parallel to the contour line of the terrain, and possible hazards caused by deep excavation and high filling of the slope should be prevented.
2 In hot areas, the intersection angle between the longitudinal axis of the main powerhouse and the prevailing wind direction in summer should not be less than 45°.
5.0.8 The general layout of public and auxiliary facilities shall meet the following requirements.
1 Should be located close to their respective primary users.
2.The general step-down substation should be arranged at the edge of the factory area where the high-voltage line enters conveniently.
3 Gas facilities should be arranged in areas with few people and traffic.
4 The acid regeneration station should be arranged near the pickling workshop, and should be located on the windward side of the main building of the cold-rolled electrical steel factory with the minimum frequency wind direction all the year round.
5 The cooling facilities of the circulating water treatment system should be arranged on the windward side of the minimum frequency wind direction of the buildings and structures in winter. The protective distance between cooling facilities and buildings and structures shall comply with the relevant provisions of the current national standard "Code for Design of Transportation Design for General Drawings of Iron and Steel Enterprises" GB 50603.
6 The compressed air station should avoid the gas, boiler room and waste acid treatment facilities, and should be located on the downwind side of the perennial minimum frequency wind direction of the gas, boiler room and waste acid treatment facilities.
5.0.9 Office and living facilities should be arranged on the downwind side of the perennial minimum frequency wind direction in the cold-rolled electrical steel factory area, and where the flow of people is concentrated.
5.0.10 The transportation mode of materials in cold-rolled electrical steel plant shall be determined after technical and economic comparison according to external transportation conditions, source of raw materials, destination of finished products, and transportation volume.
5.0.11 When the cold-rolled electrical steel plant is arranged near the hot-rolling plant that provides raw materials for it, a special channel for cold-rolled raw material transportation that does not intersect with railways and roads should be set up between the hot-rolling plant and the cold-rolling plant.
5.0.12 The vertical layout, comprehensive layout of pipelines, greening design, and the design of transportation systems such as railways and roads shall comply with the relevant provisions of the current national standard "Code for Transportation Design of General Drawings of Iron and Steel Enterprises" GB 50603.
6 Power supply and distribution facilities
6.1 Power supply
6.1.1 The power supply and distribution design of each production unit shall comply with the relevant provisions of the current national standard "Code for Design of Power Supply and Distribution System" GB 50052.
6.1.2 The main electricity load of the cold-rolled electrical steel project shall be the secondary load, and the sealing roll of the annealing furnace, the hearth roll of the annealing furnace and the drying furnace, and the circulating pump of the annular furnace shall be the primary load. The secondary load should be powered by two circuits of 110kV (35kV) power lines. When any circuit fails and the power is cut off, the other circuit should be able to bear the power supply for all loads. In addition to being powered by two-circuit 110kV (35kV) power lines, the primary load should also introduce a security power supply from different power points, or be equipped with a diesel generator for power supply.
6.1.3 The number of 110kV (35kV)/10kV total drop main transformers should be set according to the size of the power load and the phased construction situation. It is advisable to install 2 to 3 double-winding transformers. When any one of them fails, the other transformers should be able to meet the requirements. The electricity demand of the full load.
6.2 Power supply and distribution system
6.2.1 The medium voltage distribution voltage level of each production unit should be 10kV voltage level.
6.2.2 A 110kV (35kV)/10kV general drop should be installed in a cold-rolled electrical steel plant, and whether to set up switch stations in different areas should be determined according to the layout of production units, and the switch stations in each area should be close to the load center.
6.2.3 The main wiring of the power supply and distribution system should adopt single busbar or single busbar section wiring, and the power distribution system should adopt radial type.
6.2.4 The power quality problems caused by the electrical equipment of each production unit should be dealt with in the general drop or switch station in this area.
6.2.5 Microcomputer monitoring system should be used for relay protection and automatic devices. The total monitoring station (station control layer) should be located at the 110kV (35kV)/10kV general drop or rolling mill switch station.
6.2.6 The grounding method of 110kV (35kV) system shall be determined by the superior substation. The 10kV power distribution system can be grounded through a small resistor or an arc suppression coil. The design of the grounding system shall comply with the relevant provisions of the current national standard "Code for Grounding Design of AC Electrical Installations" GB/T 50065.
6.3 Power supply and distribution project
6.3.1 The design of cable distribution lines shall comply with the relevant provisions of the current national standard "Code for Design of Electric Power Engineering Cables" GB 50217.
6.3.2 Power cables should be XLPE insulated and PVC sheathed power cables.
6.3.3 The laying method of power supply and distribution lines in the factory area should be mainly cable tunnels, and cable trenches, buried pipes or laying along crane beams should be used locally.
7 Electric drive
7.1 Low-voltage power supply and distribution system
7.1.1 In the electricity load of the cold-rolled electrical steel plant, the seal roll of the annealing furnace, the hearth roll of the annealing furnace and the drying furnace, and the circulation pump drive motor of the ring furnace should have an emergency power supply in addition to the normal power supply. When the emergency power supply is powered by a diesel generator set, several production units can share one or more diesel generator sets for power supply according to the capacity of the emergency load.
7.1.2 The power load level of fire-fighting equipment shall comply with the relevant provisions of the current national standard "Code for Fire Protection Design of Buildings" GB 50016.
7.1.3 Automatic control system, important testing instruments...
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