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含硫量较高的生铁,凝固以后就会生成白口铁。这种生铁的特点,是渗碳体组织极不稳定,且易迅速分解。这种生铁石墨化的速度与炉温升高的速度有关。为此,对高硫生铁的墨石化过程进行了研究,目的是要找到一种方法,以便缩短高硫生铁转变为黑心可锻铸铁这一较长的退火周期。试验是在980～1050°的电极盐浴中进行的。试验时轮流采用了两种不同成分的盐浴,其中一种盐浴的成分是以熔解温度800°的氯化钡为主,另加有氰化钠;另一
High sulfur content of pig iron, white iron will be generated after solidification. This pig iron is characterized by very unstable cementite structure, and easy to break down quickly. The rate of graphitization of this pig iron is related to the rate of increase of the furnace temperature. To this end, the ink-petrochemical process of high-sulfur pig iron has been studied in order to find a way to shorten the longer annealing cycle of converting high-sulfur pig iron to black-hearted malleable iron. The test was carried out in an electrode salt bath at 980-1050 °. In the experiment, two salt baths of different compositions were used in turn. The composition of one of the salt baths was dominated by barium chloride with a melting temperature of 800 ° C, and sodium cyanide added. Another