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GB 50765-2012Design code for carbon plant (English PDF)

炭素厂工艺设计规范

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Issued by

MOC

Level / Type

National · Mandatory

Issue date

May 28, 2012

Implementation date

December 1, 2012

Scope

GB 50765-2012 is the English-translated version of 炭素厂工艺设计规范.

GB 50765-2012 is the Chinese standard "Design code for carbon plant". Its scope clause reads: 1.0.1 This code is formulated with a view to unifying the technical requirements for the process design of carbon plants, promoting technical progress and improving design quality and efficiency.

1.0.2 This code is applicable to the process design of newly built, reconstructed and expanded large and medium-sized metallurgical and chemical carbon plants. 1.0.3 The process design of carbon plants shall actively adopt advanced new processes, technologies, equipment and materials.

The adoption of a new process shall be supported by an appraisal certificate of a semi-industrial test or industrial test approved by the competent authority. 1.0.4 The process design of carbon plants shall achieve comprehensive utilization of resources; nonconforming materials and waste heat arising in production shall be recovered and utilized.

1.0.5 The selection of the main equipment of carbon plants and the design of special-purpose furnaces and kilns shall, provided that process needs are satisfied, meet the requirements of high efficiency, energy saving, reliability, durability and ease of maintenance, and standard and type-approved equipment and materials shall be adopted.

1.0.6 Carbon plants shall be provided with metering devices at three levels: plant, workshop and process. 1.0.7 The process design of carbon plants shall meet the relevant requirements for safety, occupational health, environmental protection and fire prevention, and corresponding protective measures shall be taken.

1.0.8 The process design of carbon plants shall comply not only with this code but also with the current relevant standards of the nation.

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Document preview — GB 50765-2012

National Standard of the People's Republic of China

Classification: P 73

Issued by: MOC

Foreword
1 General provisions
2 Terms
3 Raw materials, auxiliary materials and fuels
3.1 Raw materials
3.2 Auxiliary materials
3.3 Fuels
4 Process procedures and technical requirements
4.1 Process procedures
4.2 Main design parameters
4.3 Energy consumption of furnaces and kilns
4.4 Pollutant emission, occupational health and safety
4.5 Metering
5 Main equipment selection
5.1 Primary crushing
5.2 Calcining
5.3 Middle crushing
5.4 Grinding
5.5 Screening
5.6 Pitch melting
5.7 Proportioning
5.8 Mixing
5.9 Forming
5.10 Baking and rebaking
5.11 Impregnating
5.12 Graphitizing
5.13 Machining
6 Workshop design
6.1 General requirements
6.2 Raw material storage
6.3 Calcining
6.4 Proportioning
6.5 Pitch melting
6.6 Mixing and forming
6.7 Baking and rebaking
6.8 Impregnating
6.9 Graphitizing
6.10 Machining and finished product storage
Explanation of wording in this code
List of quoted standards
Addition: Explanation of provisions

Foreword

This code was compiled by Guiyang Aluminum-Magnesium Design and Research Institute Co., Ltd. together with the organizations concerned in accordance with the requirements of the "Notice on Printing and Distributing the Plan for the Formulation and Revision of Engineering Construction Standards and Codes in 2006 (Second Batch)" (JIANBIAO [2006] No. 136) issued by the former Ministry of Construction.

During the compilation of this code, the drafting group carried out extensive investigation and research, conscientiously summarized practical experience, referred to relevant domestic and foreign standards and, on the basis of widely soliciting opinions, finally finalized the code through review.

This code consists of 6 chapters. The main technical contents include: general provisions; terms; raw materials, auxiliary materials and fuels; process procedures and technical requirements; main equipment selection; workshop design, etc.

The provisions printed in bold type in this code are compulsory provisions and shall be strictly implemented.

The Ministry of Housing and Urban-Rural Development is in charge of the administration of this code and the explanation of the compulsory provisions, the Administration Office of Engineering Construction Standards and Codes of the China Nonferrous Metals Industry is responsible for routine management, and Guiyang Aluminum-Magnesium Design and Research Institute Co., Ltd. is responsible for the explanation of specific technical contents. If there are any opinions or suggestions during the implementation of this code, please send them to Guiyang Aluminum-Magnesium Design and Research Institute Co., Ltd. (address: No. 2 Jinzhu Road, Jinyang New District, Guiyang, Guizhou Province; postcode: 550081) for reference in future revision.

Chief development organization and participating development organizations of this code:

Chief development organization: Guiyang Aluminum-Magnesium Design and Research Institute Co., Ltd.

Participating development organizations: Shenyang Aluminum-Magnesium Design and Research Institute Co., Ltd.; Guizhou Branch of Aluminum Corporation of China; Ningxia Qingtongxia Aluminum Co., Ltd.

1 General provisions

1.0.1 This code is formulated with a view to unifying the technical requirements for the process design of carbon plants, promoting technical progress and improving design quality and efficiency.

1.0.2 This code is applicable to the process design of newly built, reconstructed and expanded large and medium-sized metallurgical and chemical carbon plants.

1.0.3 The process design of carbon plants shall actively adopt advanced new processes, technologies, equipment and materials. The adoption of a new process shall be supported by an appraisal certificate of a semi-industrial test or industrial test approved by the competent authority.

1.0.4 The process design of carbon plants shall achieve comprehensive utilization of resources; nonconforming materials and waste heat arising in production shall be recovered and utilized.

1.0.6 Carbon plants shall be provided with metering devices at three levels: plant, workshop and process.

1.0.7 The process design of carbon plants shall meet the relevant requirements for safety, occupational health, environmental protection and fire prevention, and corresponding protective measures shall be taken.

1.0.8 The process design of carbon plants shall comply not only with this code but also with the current relevant standards of the nation.

2 Terms

2.0.1 primary crushing

The process in which the main raw materials in carbon material production, such as green petroleum coke or anthracite, are crushed to the particle size required by the various types of calcining. It also includes the process in which large lumps of green products, baked products or graphitized products returned to the flow in production are crushed to a particle size suitable for conveying by general-purpose conveying equipment.

2.0.2 calcining

The process in which various carbonaceous raw materials are heat-treated at high temperature to drive off their moisture and volatile matter and correspondingly improve the physical and chemical properties of the raw materials.

2.0.3 middle crushing

The process in which calcined petroleum coke or anthracite and the various materials returned to the flow undergo a second or third crushing to reach the particle size required by the dry material formula.

2.0.4 grinding

The process in which the main raw materials, such as calcined petroleum coke or anthracite, are milled to the particle size required for proportioning.

2.0.5 screening

The process in which calcined petroleum coke, anthracite, etc. and the various materials returned to the flow are classified during production to obtain the various particle sizes required for proportioning or for the next process step in production.

2.0.6 pitch melting

The process in which solid coal tar pitch used as a binder or impregnant is converted into liquid pitch by indirect heating.

2.0.7 mixing

The process in which carbonaceous dry materials of various size fractions in specified proportions and a fixed quantity of binder are mixed and kneaded at a certain temperature into a plastic paste.

2.0.8 forming

The process in which carbon paste undergoes plastic deformation in a mould under the action of external pressure and alternating vibration force, finally becoming a green product with certain external dimensions and relatively high density.

2.0.9 baking

The process in which green products are heat-treated at high temperature under the protection of packing material, so that the pitch is carbonized and forms an organic bond with the aggregate and fines, achieving the required physical and chemical properties.

2.0.10 impregnating

The process in which, at a certain temperature, liquid impregnant is forced into the pores of carbon products by first evacuating and then pressurizing, so as to increase their density.

2.0.11 rebaking

The process in which impregnated baked products are baked again so that the impregnant that has penetrated into the pores of the baked products is carbonized.

2.0.12 graphitizing

The process in which semi-finished products after baking or rebaking are heated electrically in a graphitizing furnace to a high temperature above 2500°C, so that the size of the carbon network crystallites increases, the interlayer spacing of the lattice decreases and the lattice constant approaches that of natural graphite, thereby obtaining the physical and chemical properties required for the products.

2.0.13 machining

The process in which semi-finished products after baking or graphitizing are machined to the shape and dimensions required for the finished products, producing carbon products that meet the requirements.

Remaining clauses in the full document

3 Raw materials, auxiliary materials and fuels
4 Process procedures and technical requirements
4.1 Process procedures
4.2 Main design parameters
4.3 Energy consumption of furnaces and kilns
4.4 Pollutant emission, occupational health and safety
4.5 Metering
5 Main equipment selection
6 Workshop design
Explanation of wording in this code
List of quoted standards
Addition: Explanation of provisions

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 68 pages — is available in the English PDF.

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