LAUSR

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.