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本文为了探讨焦化厂职工恶性肿瘤的发病因素，对该厂进行癌死因回顾调查并以钢研所为对照。结果表明，焦化厂癌死亡２６７．１４／１０万，明显高于钢研所的３２．２９／１０万，统计学意义非常显著（Ｐ＜０．００１）。同时本文对焦化厂和钢研所部分职工头发中微量元素进行了分析。测定结果。焦化厂职工头发中锌、钙含量明显低于钢研所，差异显著，分别Ｐ＜０．０５和Ｐ＜０．０１。而焦化厂职工发样铜、铜／锌、锰含量，明显高于钢研所，差异显著，分别Ｐ＜０．０５、Ｐ＜０．０１和Ｐ＜０．００１。两组职工发镁、铁、铅相比无统计学意义Ｐ＞０．０５。同时本文对焦化厂的炼焦和非炼焦职工头发中铜、锌、铁、钙、镁、铅、铜／锌进行了比较，均无统计学差异，Ｐ＞０．０５。本研究认为焦化厂职工头发中锌、钙低，而铜、铜／锌、锰高可能是焦化厂职工恶性肿瘤高发的因素之一，还有待于进一步研究。
In order to investigate the pathogenic factors of the malignant tumors in the coking plant workers, this article conducts a retrospective investigation of the cancer cause and compares it with the Steel Research Institute. The results showed that the death rate of cancer in the coking plant was 267.14/lakh, which was significantly higher than that of the steel research institute (32.29/100,000). The statistical significance was very significant (P<0.001). At the same time, trace elements in the hair of some workers in the coking plant and steel research institute were analyzed. The measurement results. The content of zinc and calcium in coke workers’ hair was significantly lower than that in steel research institutes, with significant differences (P<0.05 and P<0.01, respectively). The contents of copper, copper/zinc, and manganese in the coking plant workers were significantly higher than those in the steel research institute, with significant differences (P<0.05, P<0.01, and P<0.001, respectively). There was no significant difference in magnesium, iron, and lead between the two groups (P>0.05). At the same time, the coking and non-coking workers in the coking plant were compared for copper, zinc, iron, calcium, magnesium, lead, and copper/zinc in the hair of the coking plant, and there was no statistical difference (P>0.05). This study concludes that the zinc and calcium in the hair of the coking plant workers are low, and the high copper, copper/zinc, and manganese may be one of the factors causing the high incidence of malignant tumors in coking plant workers. It needs to be further studied.