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文中阐述了采用热风烧结的理由,介绍了弗尔克林根烧结厂的热风装置,固体燃料耗量的下降,烧结矿氧化度的改善以及烧结矿产量的增加。本文主要叙述勒希林——布尔巴赫钢铁厂弗尔克林根烧结厂20年来使用热风烧结降低固体燃科耗量的经验。弗尔克林根烧结厂于1928年投产两台30米~2烧结机;第三台30米~2烧结机和第四台(42米~2)烧结机相继于1930年和1938年投产,直至目前为止,已生产大约4300万吨烧结矿,其中约2700万吨是用热风烧结的。初始的想法是,至少将部分烧结所需的热能以煤气或预热空气的形式送入烧结机,这种想法在1950年以前就已经提出。原因是当时适用于烧结厂的固体燃料供应困难,恰好有些钢铁厂的高炉煤气又过剩,但,不单是钢铁厂有高炉煤气可以供给和高热值烧结用燃料供应困难,而且达到尽可能均匀的烧结矿质量也使得采用气体燃料具有重要意义,采用普通烧结方法时,往往上层烧结矿中产品质量必然比较差些,其原因是: ——混合料温度太低或者混合料在烧结温度范围内的停留时间太短,没有烧透; ——点火器后面的冷空气使烧结矿表层冷却太快,即使表层烧得很好,冷空气也会使下面一层燃结不足; ——未燃烧的焦粉夹杂在表层烧结矿中,致使下面各层的热量缺乏。
In this paper, the reasons for using hot air sintering are expounded. The hot air device in Volklingen sintering plant, the decrease of solid fuel consumption, the improvement of sinter oxidation degree and the increase of sinter yield are introduced. This paper mainly describes the experience of using hot air sintering to reduce the consumption of solid fuel burning for 20 years in the Letlin-Burbach steel plant. In 1928, the Volklingen Sintering Plant put into operation two 30m2 sintering machines; the third 30m2 sintering machine and the fourth (42m2) sintering machine went into operation in 1930 and 1938, So far, about 43 million tons of sinter have been produced, of which about 27 million tons have been sintered with hot air. The initial idea was that at least part of the heat required for sintering was sent to the sintering machine as gas or preheated air, a concept that had been proposed before 1950. The reason was that solid fuel supply to the sinter was poor at the time, and some steel mills had surplus blast furnace gas. However, it is not only the steelworks that have blast furnace gas supply and high calorific value sintering fuel supply difficulties, but also the most uniform sintering possible The quality of the mines also makes it important to use gaseous fuels. When using ordinary sintering methods, the quality of the products in the upper sinter tends to be relatively poor, for the following reasons: - the temperature of the mixture is too low or the mixture stays within the sintering temperature range Time is too short to burn through; - cold air behind the igniter causes the sinter surface to cool too quickly, even if the surface burns well, cold air also causes insufficient fueling of the underlying layer; - unburnt coke Inclusion in the surface sinter, resulting in the lack of heat below the layers.