| 摘要 |
An improved economic process for producing stainless steel which comprises: (a) producing hot metal by reducing a mixture of iron ore and chromite ore by carbon reduction process at a high temperature in the range of 1250 to 1800 degree Centigrade, said hot metal having a chromium content in the range of 5-25 %; (b) decarburising of the product of step (a) in converter; (c) further decarburising the product of step (b) and making the steel which is ready for casting in continuous casting machine or in ingot moulds. The carbon reduction process is carried out in a submerged arc furnace. The feed charge in the submerged arc furnace is is the form of a mixture of iron ore, chromite ore, reductants selected from one or more of coke, coal of various types, electrode paste and graphite electrodes. Iron ore and chromite ore can be used in the form of lump and/or agglomerates. The final decarburisation and degassing of the stainless steel is carried out in VOD unit operating under vacuum. |
