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首页> 外文期刊>ISIJ international >Effect of Ratio of Scrap to Iron Source on Slag–Metal Reaction at the Bottom of Blast Furnace and Packed Bed Type Partial Smelting Reduction Furnace
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Effect of Ratio of Scrap to Iron Source on Slag–Metal Reaction at the Bottom of Blast Furnace and Packed Bed Type Partial Smelting Reduction Furnace

机译：废料与铁源与铁源对高炉底部渣 - 金属反应的影响，填充床型偏熔炉

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With the depletion of high-grade iron ore and increase in amount of steel scrap, a new ironmaking process utilizing both low-grade iron ore and/or steel scrap is required. The blast furnace and packed bed type partial smelting reduction process (PSR) are the most prospective reactors. When steel scrap is used as an iron source, the hot metal composition should be precisely controlled, because tramp elements such as Cu, Sn, Ni, and Cr are dissolved in hot metal. An analysis model was developed to simulate the equilibrium of the slag–metal reaction at the bottom of such reactors. The effect of scrap ratio (iron mass ratio of scrap to scrap and sinter) on hot metal and molten slag composition was thermodynamically analyzed and the optimal composition of hot metal under controlled temperature and P _(O_(2)) was investigated. Si and Mn were found to be significantly oxidized relative to the equilibrium state, and the S content was equal to that at equilibrium under a blast furnace condition. As the scrap ratio increased, the Si, Mn, and P contents decreased. The Si content decreased to 0.1 mass% at T = 1773 K and P _(O_(2)) > 10~(?13) atm or at P _(O_(2)) = 3.03×10~(?15) atm and T < 1690 K, whereas the phosphorus content decreased at 1773 K and P _(O_(2)) > 10~(?12) atm when the scrap ratio was 0.5. PSR is expected to produce hot metal with a low impurity content by controlling the oxygen partial pressure at the bottom of the furnace.
机译：随着高档铁矿石的耗尽和钢材废料量的增加，需要采用低级铁矿石和/或钢废料的新型炼铁工艺。高炉和填充床型部分熔炼还原过程（PSR）是最前景的反应器。当钢废料用作铁源时，应精确控制热金属组合物，因为诸如Cu，Sn，Ni和Cr的流浪部件溶解在热金属中。开发了一种分析模型来模拟这种反应器底部的渣 - 金属反应的平衡。热力学分析了在热金属和熔融渣组合物上对热金属和熔融炉渣组合物的废余比（铁质量比和烧结的影响），并研究了受控温度下的热金属和 P_（O_（2））的最佳组成。发现Si和Mn相对于平衡状态显着氧化，并且S含量等于高炉条件下的平衡。随着废料比增加，Si，Mn和P含量降低。 Si含量在 t = 1773k和 p _（O_（2））> 10〜（α13）ATM或 P _（O_（2））= 3.03×10〜（？15）ATM和 T111690 K，而当废比时，磷含量在1773k和 p _（O_（2））> 10〜（？12）ATM时降低是0.5。预计PSR将通过控制炉底的氧分压来产生具有低杂质含量的热金属。

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