Hot flue gas circulation structure of sintering machine

Abstract

The invention provides a hot flue gas circulation structure of a sintering machine. According to the hot flue gas circulation structure, a hot air smoke hood is arranged above a running path of a sintering trolley of the sintering machine, a ring cooling flue gas taking pipeline is connected to a ring cooling flue gas port and a ring cooling flue gas conveying pipeline of a ring cooling machine, a ring cooling air blower is arranged on the ring cooling flue gas taking pipeline, the ring cooling flue gas conveying pipeline is connected to a flue gas conveying pipeline, and the flue gas conveying pipeline is connected to the hot air smoke hood. The hot flue gas circulation structure is characterized in that high-temperature section gas taking pipelines and elbows I are arranged and are connected to a large flue of a high-temperature air bellow of the sintering machine and a flue gas conveying pipeline; low-temperature section gas taking pipelines and elbows II are arranged and are connected to an air bellow connecting pipe of the high-temperature air bellow of the sintering machine and the flue gas conveying pipeline; and a sintering machine induced draft fan and a tubular dust collector are arranged on the flue gas conveying pipeline and are positioned among the low-temperature section gas taking pipelines, the elbows and the hot air smoke hood. The hot flue gas circulation structure has the advantages that the sintered ore yield is improved, and the amount of discharged sintering flue gas is decreased.

Description

technical field [0001] The invention belongs to the field of mineral sintering equipment, and in particular relates to a flue gas circulation structure of a mineral sintering machine. Background technique [0002] At present, in the sinter production process, due to the automatic heat storage effect of the mixture, the heat distribution of the material layer after ignition is uneven, and the heat in the lower part of the material layer is excessive, resulting in over-melting of the sinter and a decrease in the reducibility of the finished product. At the same time, the sintering The polycrystalline transformation of calcium silicate in the ore increases, bonding the grate of the sintering trolley; at the same time, in the upper part of the sintering material layer, the heat is inherently insufficient, so that the mixture and the molten material in the sintering ore cannot be fully melted. The process is difficult to fully carry out, there are too few sintered lumps, and it i...

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Problems solved by technology

[0002] At present, in the sinter production process, due to the automatic heat storage effect of the mixture, the heat distribution of the material layer after ignition is uneven, and the heat in the lower part of the material layer is excessive, resulting in over-melting of the sinter and a decrease in the reducibility of the finished product. At the same time, the sintering The polycrystalline transformation of calcium silicate in the ore increases, bonding the grate of the sintering trolley; at the same time, in the upper part of the sintering material layer, the heat is inherently insufficient, so that the mixture and the molten material in the sintering ore cannot be fully melted. The process is difficult to fully carry out, there are too few sintered lumps, and it is difficult to obtain high-quality sintered products. Therefore, the temperature distribution of the sintered material layer has gradually been paid attention to

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