Method for producing steel from solid, iron containing pieces
AssigneeKlockner-Werke AG
InventorsLudwig von Bogdandy, Karl Brotzmann
Life of this patent
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Abstract
A procedure is provided for producing steel from solid, iron containing pieces such as scrap iron, solid pig iron, iron pellets, iron sponge and the like. The iron containing pieces are smelted in a blown oxygen converter equipped with submerged injection devices for oxygen and pulverized fuel. The pieces are first introduced into the converter and preheated and then they are contacted with a sufficient quantity of molten steel to substantially reduce the length of the smelting period and thereby conserve fuel. The molten steel used in the contacting step is recycled from the previous batch after having been retained for the meanwhile in a separate auxiliary ladle.
Claims15
A method for producing steel from solid, iron containing metallic pieces in a blown oxygen converter equipped with submerged injection devices for oxygen and pulverized fuel, said method comprising the steps of:
- introducing a charge of solid, iron containing metallic pieces into a said converter;
- preheating said charge;
- contacting said preheated charge in said converter with a quantity of molten steel to produce a batch;
- smelting said batch for a sufficient period of time to fuse the entire batch and convert the same into a steel product;
- tapping a first portion of said steel product from the converter for further processing;
- tapping a second portion of said steel product from the converter and retaining the same separately from said converter;
- and
- subsequently reintroducing said retained second portion of steel product into the converter and using the same as said quantity of molten steel during said contacting step, said second portion and therefore said quantity of molten steel being of sufficient size to substantially reduce the length of said smelting time period.
Dependencies are inferred from the claim text.