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首页> 外文会议>International conference on alternative routes of iron and steelmaking >Study of a Two-Stage Smelting Reduction Process for Ironmaking by a Thermochemical Model
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Study of a Two-Stage Smelting Reduction Process for Ironmaking by a Thermochemical Model

机译：用热化学模型进行两级冶炼减少工艺的研究

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摘要

A thermochemical model is developed to study the two-stage smelting reduction process for ironmaking without post-combustion. Steady-state multi-material and heat balance equations are solved simultaneously to study the effect of metallisation, slag basicity, coal rank and heat loss on consumption rates of coal, ore, flux and oxygen and production rate of slag to produce hot metal of a given composition, tapped at a given temperature. The model is applied to the commercial data for a COREX-plant producing a wide range of hot metal compositions, tapped at different temperatures. The computed rates of coal, slag, flux, ore and oxygen were found to be close to the reported ones, but an exact match could not be obtained. It is found that a four per cent change in metallisation brings changes the coal rate by five per cent, flux rate by six per cent, slag rate by eight per cent and oxygen rate by 13 percent, while a ten per cent change in basicity changes the coal rate by ten percent, flux rate by 13 percent and oxygen rate by 22 percent. Further, it is found that an increase in metallisation decreases the coal rate and export gas. At a given percent metallisation, the coal rate and the export gas are lowest for anthracite compared to all other types of coal.
机译：开发了一种热化学模型，以研究炼铁炼制的两级冶炼减少过程。同时解决稳态多材料和热平衡方程，以研究金属化，渣碱，煤炭等级和煤炭消耗率的效果，矿渣，渣的生产速度，以产生铁的热金属给定的组合物，在给定温度下敲击。该模型应用于Corex植物的商业数据，产生各种热金属组合物，在不同的温度下敲击。发现计算的煤，渣，助焊剂，矿石和氧气率接近报告的速率，但无法获得精确的匹配。结果发现，金属化的4％变化使煤率变化了5％，助焊剂率为6％，渣速度达到8％，氧气率为13％，而碱度变化的10％变化将煤率百分之十，助焊剂率为13％，氧气率为22％。此外，发现金属化的增加降低了煤率和出口气体。在给定的金属化百分比，与所有其他类型的煤相比，煤液和出口气体对无烟煤最低。

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