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一、试验 1.原料本试验采用澳大利亚的赤铁矿和日本的石灰石为原料,冶金焦由澳大利亚钢铁厂提供。原料的化学成分和粒度分布特性分别列于表1和表2。铁矿石含硅和铝相对地比较高。混合料中的返矿是采用上述原料在普通的烧结锅中制备的。返矿的碱度(CaO/SiO_2即C/S)为1.85。必要时,可用纯硅砂调节试验用矿石、石灰石、焦粉和返矿组成的混合料的碱度。加到烧结混合料中的返矿分为两个粒级,其中2/3为3.2～6.4毫米,1/3为-3.2毫米。
First, the test 1. Raw materials This test using Australian hematite and Japan’s limestone as raw material, metallurgical coke from the Australian steel mill to provide. The chemical composition and particle size distribution characteristics of the raw materials are shown in Table 1 and Table 2, respectively. Iron ore containing silicon and aluminum is relatively high. The return ore in the mix is prepared using the above raw materials in a conventional sinter pot. The basicity of the returned ore (CaO / SiO 2 ie C / S) is 1.85. If necessary, the pure silica sand can be used to adjust the alkalinity of the mixture of test ores, limestone, coke and return ore. The returned ore added to the sinter mix was divided into two fractions of which 2/3 was 3.2-6.4 mm and 1/3 was -3.2 mm.