sintering machine to blow air through the bed of the charge (Figure 3.6.) Are designed and operate as follows.The camera under a pallet with a layer of fan forced air charge.All work branch sintering machine equipped with shelter to collect the kiln gases and the creation of good sanitary conditions of work in the shop.The space under the shelter divided into two zones: the rich gas (in the zone of intensive firing) and the poor (in the rear) gas.In the gas-rich zone 9 situated blow chambers fabric expansion joints in which air is supplied under pressure from separate fan 3-4 kPa, in lean gas - 6 blowing chambers with separate fan.Gases from the shelter are sucked separately two fans providing a vacuum under cover of about 20 kPa.Rich gases with 5-7% sulfur dioxide is directed to the production of sulfuric acid.In these switches 55-60% of the sulfur contained in the charge.Poor gases 2-2.5% sulfur dioxide or recycled to blow in the first 9 cameras (operation with recirculation) or after cooling to 450-500 ° C to 80 ° C is sent to the bag filter dust removal and emit into the atmosphere.We blow agglomachines different node ignite the charge.Blowing sintering machine equipped with three feed hopper: for the bed, and the main layer of incendiary charge.The height of the bed layer is 15-20 mm, 20-25 mm incendiary layer and the core layer of 200-250 mm.The bed is prepared from working agglomerate particle size of 8-15 mm.Incendiary layer is a small fraction, which is separated in the din before loading the sinter.Ignition furnace and fabric expansion joints with a gas or oil burners located between the feeder and the primary layer of incendiary charge.Grilled layer, moving together with tape, leaving a layer of the main charge.Under the mountain is located only a vacuum chamber, a vacuum which is 1-1.5 kPa.Flux sintering machines with the blast of 13-18 t / (m2sut).Poor by sulfur dioxide gas sintering machine, except for use as working in the recycling schemes, may be subjected to after cleaning dust separate processing, such as citrate method, as implemented in the installation of one of the lead US refineries.Gas (Figure 3.8.) Is fed to the absorption tower with a nozzle and moves in countercurrent with citric acid.The efficiency of absorption of sulfur dioxide citric acid is 96-99%.The solution after the absorption is treated with hydrogen sulfide to elemental sulfur.The pulp after separation of the sulfur is pumped into a special chamber where kerosene is added to the flotation of sulfur.The recovered sulfur is melted and poured into a casting weight of 45 kg.Regenerated solution of citric acid from the flotation cell is returned to the absorption column.Performance Position on Gas is 2.8-4.2 m3 / min gas Sulphur - 816 kg / day.
