15th Metallurgical Co., Ltd. Zhongnan Aluminum Copper Smelting Project Blowing Furnace Sedimentation Tank Bottom Beam and Base Plate Pre-assembly Acceptance

In October, the general contractor and supervisory representative of the copper smelting project of Chinalco Southeast Copper Co., Ltd. visited and inspected and guided the metallurgical plant of the 15th Metallurgical Factory to guide the pre-assembly of the bottom beam and the bottom of the sedimentation tank of the converter, and passed the acceptance inspection at one time. Pre-assembly design requires precision, which indicates that the production of the blowing furnace in this project has entered a crucial stage, which also lays a foundation for the smooth progress of the site installation work of Chinalco's southeast copper smelting project.

It is reported that the converting furnace is an important equipment for large-scale pyrometallurgical smelting. It consists of a reaction tower, a sedimentation tank, a rising flue, and a furnace frame. The sedimentation tank frame is one of the core components of the blowing furnace and consists of a column, a shell, a bottom beam, and a bottom plate. The frame of the bottom of the converter is 22.5 meters long and 7.56 meters wide. It is a frame structure composed of H-shaped steel assembled welding and high-strength bolts. The bottom plate is composed of 12 single-piece curved shells and is 23.322 meters long and 8.015 wide. Meter, 2.038 arc-shaped shell structure; bottom beam, floor connected by high-strength bolts.

In order to ensure the matching precision and welding quality between the pre-assembled components, the metal structure factory carefully summarized the first half of the smelting furnace production experience, formulated detailed technical guidance documents and breakthrough measures for heavy and difficult points. The leadership team took turns to supervise the field, technicians and quality every day. Inspectors insist on follow-up work to ensure smooth production of the team. Due to the high precision of the dimensional accuracy and small error of the bottom slab of the sedimentation tank, before the production, the structure factory set up a horizontal assembly production platform. During the production process, the team, technicians, and full-time quality inspectors performed the entire process of monitoring and recording, strictly implementing the “three inspections”. In the system, welding methods for multi-pass multi-pass welding, top-to-bottom, and middle-to-side symmetrical welding were determined during welding. The amount of welding shrinkage was minimized, and ultrasonic welding was performed on the full penetration weld after cooling. Testing. At the same time, each component was inspected strictly before assembly. After passing the qualification, the components were numbered in unison. At the time of pre-assembly, the assembly layout was drawn, and they were identified in the layout according to the number.

The general contractor and the supervisory representative visited the factory to inspect not only the pre-assembly inspection records of the bottom beam and floor of the converter's sedimentation tank, but also the total length, total width, total height and diagonal length of the assembled assembly site. Both the full-length flatness and the bolt piercing success rate were actually measured and verified. The inspection results were all in accordance with the design requirements of the drawings.