At 15:00 on April 10, 180 branch started the equipment intermediate repair project, with a planned construction period of 22 days.

Based on the idea of "strengthening the foundation of market innovation, overcoming difficulties, and improving quality and safety", the medium-sized maintenance has carefully deployed in the early stage, formulated the quality control points of maintenance projects and acceptance specifications of maintenance quality, organized professional technical personnel to discuss the optimization of equipment function and accuracy, conducted field survey and scheme discussion with engineering bidding units, and formulated a detailed construction scheme 。

The key maintenance items of this intermediate repair include the overall repair and maintenance of the annular furnace and kiln; the transformation of the two-stage traverse trolley, 403 × crane, auxiliary DC motor in the back of the perforation area to AC motor; the disassembly and maintenance of the piercer and the reducer of the continuous rolling mill; the replacement of the limit rack servo cylinder of the continuous rolling mill, the reducer of the down pressing upper device of the piercer; the localization commissioning of the motor of the piercer upper roll, etc.

In strict accordance with the requirements of management measures for safety confirmation of maintenance operation of Baotou Steel (Group) Co., Ltd., medium maintenance combs the potential safety hazards of maintenance projects, formulates preventive measures, formulates the list of hazard sources, and strictly implements the system of confirmation of potential safety hazards of maintenance projects in the process of medium maintenance to ensure the safety and controllability of medium maintenance projects. At the same time, the site planning of the medium-sized maintenance has been fixed management. In order to effectively control the construction environment, it is required to communicate with each construction unit in advance. It is required to pave the colored strip cloth first, and then drop the spare parts. It is required to strictly implement the fixed management of the equipment maintenance site and the 5S requirements of the site environment. It is also required to manage each unit participating in the maintenance in strict accordance with the quantitative assessment management method and the quantitative assessment form of the large and medium-sized maintenance.

In order to train the technical level of maintenance personnel in the plant and reduce the maintenance cost of the equipment, the medium maintenance project actively uses the maintenance force in the plant. Under the requirements of ensuring the construction quality, the raw material area, the perforation area, the limit rack area, the small cooling bed area, the finishing area, the heat treatment area and the flaw detection equipment are participated by the maintenance department, the equipment operation Department, the hot rolling department, the finishing department, the quality inspection department, etc Repair personnel shall undertake. Nearly 400 people from 7 outsourcing construction units will participate in the construction of 184 outsourcing projects.

This medium repair will lay a solid foundation for the later smooth production.