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首页> 外文期刊>Iron & Steel Review >Reduction in Consumption of Low Silica Limestone in Twin Hearth Furnace at Bhilai Steel Plant
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Reduction in Consumption of Low Silica Limestone in Twin Hearth Furnace at Bhilai Steel Plant

机译：比莱钢铁厂双炉膛炉中低硅石灰石的消耗量减少

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Twin Hearth Furnace accounts for almost half of the total steel production of 5.3 Mtpa done at BSP. Moreover, for THF steelmaking, a very essential raw material required is low silica limestone which has a major techno-economic impact on the process also. The specific consumption of this limestone depends mainly on the silicon content of the hot metal and was around 12t for 0.8-1% Si initially. Consequently, a decrease in HM silicon content lead to a reduction in the limestone proportion of the charge mix by 1.5t. However, this caused severe deterioration in the operational parameters of THF like refractory lining, taphole life and health of the THF as a whole. This issue was resolved in a cost effective manner by the part use of raw dolomite as a cheap substitute for limestone which also rendered additional operational benefits. Subsequently, the performance of the THF improved leading to an annual savings to the tune of more than 5 crores per year.
机译：双炉炉窑几乎占BSP 5.3 Mtpa钢总产量的一半。而且，对于THF炼钢，所需的非常必要的原料是低硅石灰石，其对工艺也具有重大的技术经济影响。这种石灰石的比消耗主要取决于铁水的硅含量，最初的0.8-1％Si约为12t。因此，HM硅含量的降低导致电荷混合物的石灰石比例降低1.5吨。但是，这导致THF的运行参数（如耐火衬里，出铁口寿命和整个THF的健康状况）严重恶化。通过部分使用原始白云石作为石灰石的廉价替代品，以具有成本效益的方式解决了这一问题，这也带来了额外的运营优势。随后，THF的性能得到改善，每年可节省超过5千万卢比。

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