Sintering heat preservation device, sintering machine and sintering method thereof

Abstract

The invention discloses a sintering heat preservation device, a sintering machine and a sintering method thereof, and belongs to the field of sintering equipment. The heat preservation device comprises a heat preservation cover with an upper opening and a lower opening, a heat exchanger is arranged in the heat preservation cover, the upper opening of the heat preservation cover is sealed, and theheat exchanger is used for preheating the outer air entering the heat preservation cover during sintering operation; and the heat preservation device can fully utilize the heat dissipated by the sintering material surface to form a gradually-reduced trapezoidal temperature field, and the oxygen supply uniformity of the cross section of a sintering trolley is improved, so that the sintering qualityof the upper part of the sintering material layer is improved, and the ore return rate is reduced. The sintering machine comprises the sintering trolley, a ignition furnace and the heat preservationdevice, the sintering machine can supply sufficient oxygen to the sintering material layer while preserving heat, and the quality of the upper part of the sintering material layer and the uniformity of the sintering cross section are improved. According to the sintering method, the above sintering machine is adopted, through setting a reasonable sintering process, the sintering material surface can be ensured to be slowly and uniformly cooled in an environment with sufficient oxygen, the sintering is uniform, and the sintering quality is improved.

Description

technical field [0001] The invention belongs to the field of sintering equipment, and more specifically relates to a sintering heat preservation device, a sintering machine and a sintering method thereof. Background technique [0002] After sintering and ignition, heat preservation treatment can reduce the heat lost from the surface of the sinter layer, avoid the rapid cooling of the surface sinter, prolong the formation time of the surface sinter binder phase, and at the same time facilitate the reduction of calcium ferrite minerals in the binder phase and strength enhancement. However, the imperfect insulation system will easily lead to undermelting on the surface of the material layer, floating ash on the surface of the sinter, and a large amount of return ore, which will lead to a decrease in sintering productivity, a decrease in the metallurgical properties of the sintering ore, and an increase in sintering energy consumption. [0003] The ignition and heat preservatio...

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Problems solved by technology

[0016] Aiming at the problems of the existing heat preservation cover during sintering production, such as air grabbing from the ignition furnace, large gas consumption, rapid cooling of the material surface, or uneven air volume entering the horizontal material surface of the trolley, the present invention provides a sintering heat preservation device, which It can make full use of the heat lost on the surface of the sintering material, form a gradually decreasing trapezoidal temperature field, and supply uniform and sufficient oxygen to the cross-sectional direction of the sintering trolley, improve the uniformity of oxygen supply in the cross-section of the sintering trolley, thereby improving the temperature of the sintering material. Improve the sintering quality of the upper part of the layer and reduce the return rate

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