350KA large-scale pre-baked trough electrolytic aluminum technical transformation project of China Aluminum Corporation Lanzhou Branch Company is a one-time investment project since the establishment of the plant, and it is also a landmark project for the company's rapid development, bigger and stronger. The company’s leadership attaches great importance to this project. Before the construction of the project, it organized a lean management organization, formulated a perfect management system, clarified the responsibility goals, formulated a plan for excellence, established a quality assurance system, and set quality goals. Decomposition, clarified the quality responsibilities and assessment methods of management personnel at all levels, and put forward the quality goal of “ensuring excellence and striving for excellenceâ€.
The technical reform project manager department was established in April 2000 and is mainly responsible for the progress, quality, and investment management of the large-scale technical transformation project of Chinalco Lanzhou Branch during the implementation phase. Its management staff is based on the company's employment system within the company's open recruitment, through a series of rigorous examinations, defense procedures selected. In the process of project construction, Zhong Yu Hengye Engineering Cost Consulting Co., Ltd., an auditing intermediary agency, was introduced to implement the whole process of follow-up auditing of all project and equipment bidding, various types of contract management, financial accounts and capital transactions. According to the project construction situation, the project department has written and formulated various management methods in a timely manner and implemented it in the project.
Strengthen on-site management
Ensure project quality
In order to ensure that the general layout of the site is uniform and continuous, and the construction site is properly allocated so that the temporary installation of each construction unit will not affect the construction of the follow-up project, the Regulations on the Administration of the Site General Map of the Technical Transformation Project Department of Lanzhou Aluminum Co., Ltd. are formulated. .
In order to ensure the quality of project construction, the Regulations on Quality Management Rewards and Punishments of the Lanzhou Aluminum Industry Co., Ltd. Technical Reform Project Department was formulated in a timely manner. During the construction process, the status of the physical quality of the project and the operation of the quality management system of each construction unit were checked and evaluated. Ensure the normal operation of the quality management system. The principle of uniform procurement of bulk raw materials was implemented to ensure the quality of raw materials for construction. In accordance with the project's excellence plan, each construction unit prepared the fine details in a timely manner and set up a QC activity team to strengthen the quality management and control of the entire construction process in accordance with the ISO9001-2000 quality management system requirements. Major construction plans and important technical measures implement multi-project optimization and expert demonstration systems to ensure the economical efficiency, feasibility and reliability of the plan. An emergency plan was prepared for the construction of the more dangerous projects.
Strengthen the social supervision function
Ensure project construction safety
In order to ensure the quality of construction, China Nonferrous Metal Construction Engineering Quality Supervision Station sent a resident supervisory engineer to the site to supervise the construction of the project, supervision, and the construction activities of each participating construction unit, and to carry out the physical quality of important projects and key locations. Sampling, timely verification of project quality level. In conjunction with the construction unit, a comprehensive inspection of the construction progress, quality, and on-site safety and civilized construction will be conducted on a quarterly basis, and actual quantities will be measured on important sites.
Strengthening construction
Difficulties in technology management
Because of its advanced production technology and design technology, the project has broken the inertia of the way of thinking of construction for many years, and also brought certain difficulties to the construction. Therefore, the company’s employees to ensure the quality of the electrolytic bath and aluminum bus process construction, on-site A set of construction methods was studied, namely the "Construction Method of 400 KA Integrated Ship Shaped Casing" and "400KA Cathode Bus Installation Method." After fully demonstrating the method, it was promoted and applied in the project and achieved good results.
The imported equipment is installed with advanced design technology and high degree of automation. In the high-risk and polluted operation areas, the equipment is basically operated by the equipment. To ensure the installation quality and pass the test run once, a leading group for the installation and commissioning of imported equipment is specially organized to take Difficulties were solved in a timely manner, resulting in smooth installation work. Equipment installation and acceptance passed once. The one-time commissioning and linkage trials had a one-time success rate of more than 95%, effectively guaranteeing the construction period.
Strengthen awareness of environmental protection and energy conservation
Increase environmental investment
In order to be highly efficient, environmentally friendly and energy-saving, the aluminum electrolysis dry cleaning and recovery technology system draws on the advantages of the respective dry cleaning technologies introduced by Shenyang and the United States, and after years of practical improvement, it has deployed advanced dust removal and purification in its purification system. Equipment—LLZB rhombic combined bag dust collector, advanced VRI reactor and automatic control system have the characteristics of high dust removal efficiency, compact structure, convenient and safe overhaul, low emission index, etc., and fully meet the requirements of national environmental protection discharge.
Roasting flue gas purification and recovery system is the first time in China to use the combination of electro-trapping and dry process, and the purification efficiency is higher. The actual monitoring of the production: harmful fluorine is lower than 2mg/Nm3, tar is lower than 3.5mg/Nm3, and dust is 10mg/Nm3. The emission standards of the national standard are as follows: Fluoride below 3.5 mg/Nm3, tar below 10 mg/Nm3, and dust 30 mg/Nm3. The purification effect is much higher than the national standard. Perfect sewage treatment and recovery system has reached the national zero emission standards.
Advanced electrolytic aluminum technology
Significant energy savings
The Shenyang Aluminium Magnesium Design and Research Institute adopted a new design concept and applied new materials, new structures, and new operating techniques to develop a domestic SY350 electrolytic cell with a large single-tank capacity, high current density, and high current density. The strength reaches 375KA, the experimental tank current is up to 400KA, and the anode current density is as high as 0.82A/cm2. It is an independently designed domestic industrial operation and has a 375/400KA electrolytic cell with independent intellectual property rights.
Project management
Achieved the desired effect
The project has a fast construction, excellent quality and complete data. The overall construction quality and system was rated as a ministerial-level quality project by the Non-ferrous Metal Industry Construction Association in February 2009. In March 2009, the National Investment Association was awarded the “Quality Investment Projectâ€. Now declaring the National Quality Engineering Silver Award.
Bold innovation in process design, advanced design concepts, and reasonable economic and technical indicators. The design of the electrolytic aluminum technical transformation project and the design of the prebaked anode production system were awarded the first and second prizes by the Nonferrous Metals Construction Association in May 2009. Created a first-class construction speed, first-class construction quality, first-class civilized model site.