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1. A process for providing cast iron or semi steel and hydrogen-rich reusable reducing gas by using a high pressure refractory lined shaft furnace having operative top, bottom, and middle zones, operating at a pressure between 5 and 50 kg/cm2g, the process comprising:
(i) feeding iron ore from an inlet provided in the operative top zone along with a slag producing material; (ii) gasifying a carbonaceous material in a separate refractory lined gasifier, operated at a pressure between 5 and 50 bar, using preheated oxygen, to provide reducing gas at a temperature of at least 1400° C.; (iii) feeding in parts the reducing gas to the high pressure shaft furnace through tuyeres provided at the operative bottom zone; (iv) smelting the iron ore and slag material by using the reducing gas in the high pressure shaft furnace, to provide molten iron and molten slag; (v) controlling and maintaining the temperature to between 1400 and 1700° C., required for iron ore reduction and melting in the operative bottom zone of the high pressure shaft furnace during the operation; (vi) collecting molten iron and molten slag in the operative bottom zone; (vii) discharging molten iron and molten slag from the operative bottom zone; (viii) discharging spent reducing gas from the operative top zone into a gas cleansing unit; (ix) extracting dust and sulfur from the spent reducing gas in the gas cleansing unit, to provide a purified spent reducing gas; and (x) passing the purified spent reducing gas through a shift catalyst selected from the group consisting of copper, platinum, zinc, aluminum, iron and chromium in the presence of steam to provide the hydrogen-rich reusable reducing gas, wherein excess oxygen is fed through the tuyeres at the operative bottom zone of the high pressure shaft furnace to produce semi steel.
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