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朝鲜在铁焦方面的经验是我国很多同志早就关心的问题。本文在铁焦炼铁方面给我们提供极有价值的参考资料.朝鲜试验铁焦早在1951年9月就在工厂开始了。当时得到下面几点结论:(1)制造铁焦如用结焦煤,则含铁焦炭的强度最好,用幕山精矿粉时可以全部还原为金属铁;但以配煤中用20—25%精矿粉焦炭强度最好;矿粉多于30%以后,强度此普通焦炭低;(2)因为铁焦中含的正是金属铁,高炉可以造得矮一些;(3)用在高炉中冶炼时,因为焦比低,单位生铁的风量减少,产量可以提高。(4)铁矿粉系由结焦过程中析出的 H_2,CH_4等气体来还原.1957年,开始在一座57孔的现代炼焦炉中试验,共生
North Korea’s experience in iron coke has long been a topic of concern to many of our comrades. This article provides us with valuable references in the iron coke ironmaking test. North Korea experimented iron coke as early as September 1951 at the factory. At that time, we got the following conclusions: (1) When iron coke is used to make coking coal, the strength of iron-bearing coke is the best. When using the Cuoshan shale ore concentrate, it can all be reduced to metallic iron; % Concentrate powder coke strength best; slag more than 30%, the strength of this ordinary coke low; (2) because the iron coke is contained in the metal iron, the blast furnace can make shorter; (3) used in the blast furnace In smelting, because the coke ratio is low, the unit reduces the amount of pig iron, the output can be increased. (4) Iron ore fines are reduced by H 2, CH 4 and other gases precipitated during the coking process. In 1957, experiments were started in a 57-hole modern coke oven with symbiosis