| 摘要 |
<p>Disclosed is a method for producing cast iron or semi steel and syngas/reducing gas in a high pressure refractory lined shaft furnace using minimal or no coke. Iron ore and slag producing material are fed into the operative top zone of the shaft furnace while reducing gas which is generated in a refractory lined gasifier using preheated oxygen is fed through tuyeres at the operative bottom and middle zones. The shaft furnace is operated at a high pressure to increase productivity and to facilitate use of the spent reducing gas downstream. Excess oxygen is fed to the shaft furnace to reduce the carbon content in the molten iron and generate semi steel. The present invention provides an economical method for obtaining cast iron or semi steel which also substantially reduces the size of the furnace.</p> |
