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首页> 外文会议>National Seminar on "Application of Chemical Engineering for Utilisation of Natural Resources (CHEMINAR-2001)", Feb 16-18, 2001, Bhubaneswar >Factors Influencing Tar Yield Under Industrial Conditions
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Factors Influencing Tar Yield Under Industrial Conditions

机译：工业条件下焦油收率的影响因素

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摘要

The requirements on coke quality and cost consciousness have changed the cokemaking practice at Tata Steel significantly. The changes are on two fronts. One, the very technology itself and second, the coal blend for cokemaking. On technological front various pre-carbonisation techniques with their specific pros and cons are available. On the front of change in blend, use of inferior blends having higher volatile matter, coals with non-coking and semi-soft and semi-hard characteristics having relatively lower VM are being used yielding similar coke characteristics. This may be looked at as the outcome of advancement in cokemaking technology ― the precarbonisation techniques. However, the influence of such changes in coke making on recovery of by-products is not very well established―particularly the most valuable one―the coal tar. The coal tar yield is governed by the content of volatile matter, their characteristics, the extent of their cracking during carbonisation inside oven and its transport from oven to tar collector. The cracking of volatiles is guided by the thermal regime inside the oven, the free space and the gas carrying main, the space between the coal cake and the oven wall. Stamped charging technology, which charges the coal in the form of a cake into ovens at higher bulk density, provides greater opportunity for cracking of volatiles resulting in lower tar yield. Present paper outlines the theoretical considerations for tar yield and validates it with some significant parameters under operating condition of an industrial set-up having both stamp charged as well as conventional top charged ovens.
机译：对焦炭质量和成本意识的要求极大地改变了塔塔钢铁公司的炼焦实践。这些变化在两个方面。一是技术本身，二是炼焦用煤。在技​​术方面，可以使用各种预碳化技术及其各自的优缺点。在共混物的变化方面，使用具有较高挥发性的劣质共混物，具有非焦化，VM相对较低的半软质和半硬质特性的煤可产生相似的焦炭特性。这可以看作是制焦技术-预碳化技术的进步的结果。但是，这种焦炭生产变化对副产物回收的影响还不是很明确，尤其是最有价值的一种是煤焦油。煤焦油的收率取决于挥发物的含量，其特性，在炉内碳化过程中裂解的程度以及从炉到焦油收集器的运输程度。挥发物的裂解受烤箱内部的热状态，自由空间和载气主体，煤饼与烤箱壁之间的空间的引导。冲压装料技术将饼状煤以更高的堆密度装进烤箱，为挥发物的裂解提供了更大的机会，从而降低了焦油收率。本文概述了焦油收率的理论考虑因素，并在具有压模装料和常规顶部装料炉的工业装置的操作条件下，通过一些重要参数对其进行了验证。

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