Reconstruction of the Arcelormittal Temirtau Metallurgical Combine Sinter Line of Sintering Machine AKM-312/336. Part 1

Resumo

Results are given for the reconstruction and modernization of sintering machine AKM-312/336 No. 7 of ArcelorMittal Temirtau (formerly Karaganda Metallurgical Combine). The gas exhaust conduit of the sinter machine is reconstructed: the first stage of the gas cleaning system within the composition of the “dirty gas” collector, 28 TsN-15 cyclones and two scraper conveyers are dismantled, and the “semiclean gas” collector with 32 dust chambers and two gate valves have been replaced, beneath which a rubber conveyer has been installed. The following have been modernized: a charge drum-mixer, two charge drum pelletizers, a charge loading assembly for the sinter machine, an ignition hearth, and an assembly for charging sinter into a linear cooler. A planned number of multicyclones (from 780 to 960) of two battery cyclones is restored, and a “zero” vacuum chamber is installed beneath the ignition hearth. Stationary throttling devices are mounted within connections of the “zero” and first vacuum chambers. The first batch of massive self-cleaning grates is manufactured and tested instead of the existing light grate bars. As a result of reconstruction and modernization, the sinter machine operating area is increased from 336 to 348 m², the charge layer from 380 to 450 mm, and sinter specific productivity is increased by ~40%; gas consumption is reduced by 70%, solid fuel consumption by 7% compared with other sinter machines.