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| Evaluation of four coals for blast furnace pulverized coal injection |
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Abstract One of the effective methods to reduce coke consumption is Pulverized Coal Injection (PCI). The most important problems encountered in this method are reduced permeability, unburned and high ash content. In order to select the best coal for injection suitable tests can be used. In this investigation, experiments such as proximate and ultimate analysis, Rock- Eval and combustion tests have been performed on four kinds of coals from different mines, Sarakhs, Sangrood, Karmozd and Tabas. The results of proximate and ultimate analysis indicate that although the sulfur and ash content of selected coals are a little high, but they are suitable for coal injection. The results of combustion experiments and Rock-Eval tests show that karmozd coal is the best one to inject into the blast furnace. It is shown that mixing of coals can improve the combustion properties of pulverized coals.
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Received: 18 September 2008
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2010, Vol. 17 
