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我厂使用的土铁含有较高的硫,最高达3~5%,一般也平均在1%上下.因此土铁脱硫就成为迫切需要解决的问题,我们采用化铁炉炉内脱硫的方法,经过二十多天的试验,已经获得成功,即使采用100%的土铁配料,也完全可以铸出灰口铸件,铸件含硫量一般在o.15%上下,最低达0.08%,最高为0.23%.而实际上铁内硫大部分以MnS的状态存在,对于铸铁的机械性能与切削性能都没有多大妨碍.
The soil iron used by our factory contains high sulfur, up to 3 ~ 5%, generally on the average of 1% .Therefore, soil iron desulfurization has become an urgent need to solve the problem, we use furnace desulfurization method, After more than 20 days of testing, it has been successful, even with 100% soil iron ingredients, it is also possible to cast gray castings, casting sulfur content is generally in the o.15% up and down, the lowest 0.08% up to 0.23 %. In fact, most of the iron in the presence of sulfur in the state of MnS, the mechanical properties of cast iron and cutting performance are not much hindered.