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采用以铁精粉、煤粉和石灰石为主要原料制成含碳球团,在1 573、1 623、1 673K下进行了不同加热时间的还原试验研究,并分析计算了炉料带入硫的去向。试验结果表明:在温度为1 673K、12min时,渣铁已经能够很好的分离。所得珠铁中碳、硫的质量分数分别为3.53%和0.17%,珠铁的内部组织结构主要由珠光体和渗碳体组成。渣中以硅酸钙(CaSiO3)和硅酸二钙(Ca2SiO4)为主,含有少量的钙镁橄榄石(CaMgSiO4)和玻璃体。计算得知:炉料带入的硫中24.61%进入渣、61.91%进入铁、13.48%进入空气。
In this paper, the carbon-containing pellets were made from iron powder, pulverized coal and limestone, and the reduction experiments were carried out at 1 573, 1 623 and 1 673 K for different heating times. The fate of charge to sulfur . The test results show that the slag iron has been well separated at a temperature of 1 673K and 12min. The results showed that the mass fraction of carbon and sulfur in the obtained beads was 3.53% and 0.17%, respectively. The internal structure of the beads mainly consisted of pearlite and cementite. Residue to calcium silicate (CaSiO3) and dicalcium silicate (Ca2SiO4) mainly containing a small amount of calcium and forsterite (CaMgSiO4) and vitreous. It is calculated that 24.61% of the sulfur brought into the charge enters the slag, 61.91% enters the iron and 13.48% enters the air.