Announcement of the Ministry of Housing and Urban-Rural Development of the People's Republic of China
No. 591
Announcement on publishing the national standard Code for design of continuous casting engineering
Code for design of continuous casting engineering has been approved as a national standard with a serial number of GB 50580-2010, and shall be implemented from December 1, 2010. Thereinto, Subclauses 3.0.27, 4.1.6, 4.4.8 and 7.1.1(2) are compulsory provisions and must be enforced strictly.
Authorized by the Research Institute of Standards and Norms of the Ministry of Housing and Urban-Rural Development of the People's Republic of China, this code is published and distributed by China Planning Press.
Ministry of Housing and Urban-Rural Development of the People's Republic of China
May 31, 2010
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.
According to the requirements of Notice on printing and distributing the (JIANBIAOHAN [2006] No.136) issued by the former Ministry of Construction, this code is jointly prepared by Capital Engineering & Research Incorporation Ltd. with organizations concerned.
During the development of this code, the drafting group, following the relevant basic construction guidelines and industrial policies of China, has summarized the experiences of design and production units in the steel industry in recent years by conducting targeted surveys and gathering data from steel enterprises, actively sought and incorporated feedbacks from experts, scholars, and design professionals across the nation in the fields of design, research, and industry, and delved into and assimilated the latest design achievements from abroad. Following thorough examination, analysis, and multiple revisions by the group, this code was ultimately finalized upon review.
This code comprises 8 clauses, with the main contents including: general provisions, terms, basic requirements, process design of continuous casting workshop, choice of technology parameter and type of continuous casting machine, equipment of continuous casting machine, electric instrumentation and automation, and water treatment facility.
The provisions printed in bold type are compulsory and must be enforced strictly.
The Ministry of Housing and Urban-Rural Development of the People's Republic of China is in charge of the administration of this code and the explanation of the compulsory provisions; China Metallurgical Construction Association is in charge of routine management; Capital Engineering & Research Incorporation Ltd. is responsible for the explanation of specific technical contents. During the process of implementing this code, all relevant organizations are kindly requested to sum up experience and accumulate data, and feed the relevant opinions and suggestions back to Capital Engineering & Research Incorporation Ltd. (address: No.7 Jian'an Street, Beijing Economic and Technological Development Zone, 100176, China) for reference in future revision.
Code for design of continuous casting engineering
1 General provisions
1.0.1 This code is developed with a view to making the design of continuous casting engineering conform to the current technical policies and relevant standards of the nation and the industry, unifying the engineering construction standards, improving the engineering design quality, and achieving advanced technology, economy and rationality, energy conservation and emission reduction, safety and reliability, and convenient management.
1.0.2 This code is applicable to the design of continuous casting engineering, whether it is newly installed, renovated, or expanded.
1.0.3 During the design of continuous casting engineering, the national policies for steel industry development shall be conscientiously implemented, the principles of cleaner production and circular economy shall be followed, and efforts shall be made to improve the level of environmental protection and comprehensive utilization of resources, so as to save energy and reduce consumption. Additionally, efforts shall also be made to actively adopt mature and reliable new technologies, processes, materials and equipment on the basis of constantly summarizing the production practice experiences, so as to enhance the level of design technology and reduce both construction and operation costs.
1.0.4 In addition to the requirements of this code, the design of continuous casting engineering shall also meet the requirements of the current relevant standards of the nation.
2 Terms
2.0.1
rate of continuous casting
percentage of the acceptable continuous casting products produced to the total crude steel production
2.0.2
hot delivery and hot charge of continuous casting product
process where continuous casting products, at a high temperature, are directly transported to a holding furnace or a heating furnace in a steel rolling workshop, and then heated and rolled, which is abbreviated as CC-HCR
2.0.3
direct rolling of continuous casting product
process where the continuous casting product is heated by an edge and corner heating device during transport and is then directly fed into the rolling mill for rolling at approximately 1,100°C, without being transported to a heating furnace
2.0.4
near-net-shape continuous casting
casting processes from which the products are very close to their final dimensions and shapes
2.0.5
high efficiency continuous casting
continuous casting technology which focuses on the production of high-quality and high-temperature casting products and aims at achieving high casting speed, continuous casting rate and operating rate
2.0.6
continuous casting square billet/bloom
continuous casting product featuring a cross-section with all four sides of equal length and each internal angle at 90°
2.0.7
continuous casting rectangular billet/bloom
continuous casting product featuring a cross-section with the two opposite sides of equal length, each internal angle at 90°, and the length of the longer side not exceeding 2.5 times that of the shorter side
2.0.8
continuous casting slab
casting product featuring a cross-section with the two opposite sides of equal length, each internal angle at 90°, and the length of the longer side exceeding 2.5 times that of the shorter side
2.0.9
continuous casting round billet
continuous casting product with a circular cross-section, primarily used for manufacturing seamless steel pipe blanks
2.0.10
continuous casting beam blank
primarily refers to an I-shaped blank, used for rolling wide flange I-beams and track beams
2.0.11
metallurgical length
length measured along the outer arc from the liquid surface in the mould of the continuous casting machine to the endpoint where the casting product solidifies, which equals to the liquid core length calculated based on the maximum casting speed of the continuous casting machine
2.0.12
continuous casting machine length
length along the outer arc from the liquid surface of the mould to the segment of the continuous casting machine/the outer arc between the last pair of pinch rolls in the straightening and withdrawal machine
2.0.13
vertical continuous casting machine
continuous casting machine where the casting product travels vertically from the mould until it is cut to length
2.0.14
vertical bending continuous casting machine
continuous casting machine where the casting product initially moves vertically from the mould, bends along a specific radius before it is completely solidified, and then is straightened, and finally output horizontally
2.0.15
curved continuous casting machine
continuous casting machine where the casting product moves in an approximate quarter-circle arc from the mould to the straightening device, and is then straightened and output horizontally
2.0.16
straight curved continuous casting machine
continuous casting machine where the casting product initially travels vertically from the mould, undergoes bending via the strand guide equipment before complete solidification, then proceeds along an arced path, gets straightened by the straightening device, and is finally output horizontally
2.0.17
horizontal continuous casting machine
continuous casting machine where the casting product moves horizontally from the mould to the point of cutting
Foreword i
1 General provisions
2 Terms
3 Basic requirements
4 Process design of continuous casting workshop
4.1 General requirements
4.2 Match of steelmaking furnace with CCM
4.3 Productivity of workshop
4.4 Layout and building of continuous casting workshop
5 Choice of technology parameter and type of continuous casting machine
5.1 Choice of casting product section
5.2 Arc radius
5.3 Casting speed
5.4 Metallurgical length
5.5 Number of strands
5.6 Choice of type
6 Equipment of continuous casting machine
6.1 General requirement
6.2 Transporting and casting equipment for ladle
6.3 Tundish car
6.4 Tundish
6.5 Mould
6.6 Mould oscillation devices
6.7 Secondary cooling and strand guide equipment
6.8 Straightening and withdrawal machine or segment drive device
6.9 Strand cutting equipment
6.10 Roll table
6.11 Dummy bar and its storage device
6.12 Strand cooling and transporting device
6.13 Hydraulic, pneumatic and lubrication systems
7 Electric instrumentation and automation
7.1 Power supply and distribution
7.2 Drive
7.3 Automation instrumentation
7.4 Telecom
7.5 Automation
7.6 Electric
8 Water treatment facility
8.1 General requirements
8.2 Quality and conditions of continuous casting machine water
8.3 Water supply system
8.4 Main water treatment facilities
8.5 Emergency water supply
8.6 Water stabilization
8.7 Make-up water
8.8 Water quality analysis and monitoring
8.9 Layout of water treatment facility
Explanation of wording in this code
List of quoted standards
