| abstract |
This invention relates to the contact production of sulfuric acid from pyrites. The aim of the invention is to reduce the consumption of cooling water, the heat-exchanging surface of sulfuric acid coolers and increase the operational reliability of the cinder hydro-expansion pipe. The installation includes a pyrite kiln 1, a cinder hydro-removal system closed with water with a mix 2 cinder with water, pipelines, a sump 5, a contact apparatus 8, a water-cooled sulfuric acid cooler 9. The pipeline for discharging clarified water from the settling tank 5 is connected to the cooling water supply pipe of the sulfuric acid cooler, and the outlet of the refrigerator 9 is connected to the mixing unit 2 of water with a calcine. 1 il. g Burning gas (L with about 00 ate JV |