Abstract:
A process for producing and reducing an iron ore briquette, the process comprising the steps of: a. combining together a comminuted iron bearing material, a comminuted carbonaceous material, a fluxing material and a primary binder material to form a briquette mixture; b. adding a metallic particulate material to the briquette mixture; c. adding hot water and a secondary binder material to the briquette mixture; d. kneading the briquette mixture together; e. compacting the briquette mixture under pressure to form a green briquette, f. subjecting the green briquette to a primary curing to form a stable iron ore briquette or pre-heating the green briquette by conventional or induction heating means up to a temperature of 800°C; and g. feeding the green briquette or pre-heated green briquette to a furnace to produce pig iron, wherein when the iron ore briquette is subjected to electromagnetic radiation, the metallic particulate material dispersed within the iron ore briquette promotes formation of increased reactivity or seed sites and thereby increase the reduction of the iron ore briquette to form pig iron.
Abstract:
본 발명은 전력 공급의 중단 없이 용해하고, 고정상태에서 출강이 가능한 연속 조업이 가능한 고정형 전기로에 대한 것으로, 용해로의 측면에 배치되어 용해로의 배가스를 통하여 철원(스크랩)을 예열하는 예열로; 상기 예열로에서 예열된 철원을 용해로로 공급하는 공급수단; 예열된 철원을 용해시키는 전극를 포함하는 용해로; 및 상기 용해로에서 용해된 용강을 배출시키는 고정형 배출수단을 포함하며,상기 예열로는 상기 용해로에 일체로 연결된 고정형 전기로 및 이를 사용한 용강 제조 방법을 제공한다.
Abstract:
A method for the production of iron from an iron oxide-containing material includes contacting an iron oxide-containing material with a particle size distribution range with a ? 90 of less than 2mm, with a carbon-containing material with a particle size distribution range with a ? 90 of less than 6mm, in a commercial scale reactor at a temperature of between 900°C and 1200°C for a contact time sufficient to reduce the iron oxide to iron.
Abstract:
A method of using an induction furnace to process iron ore into an iron product such as pig iron in which iron ore is the main or exclusive source of iron fed into the induction furnace.
Abstract:
An electric arc furnace (10) has an outer shell (12) and an inner refractory lining (24). During its operation the electric arc furnace (10) contains a bath (28) of molten metal which has a minimum and a maximum operational level (32). An inner cooling ring (23) of copper slabs (20), which are in thermo-conductive contact with the inner refractory lining (24) and equipped with spray cooling means (22), is mounted to the outer shell (12) in the region (34) between the minimum and the maximum operational level (32).
Abstract:
Die Erfindung betrifft einen Elektroreduktionsofen (1) zur Durchführung von Reduktionsprozessen, insbesondere zur Reduktion von Schlacke zur Rückgewinnung metallischer Bestandteile. Dieser arbeitet mit elektrischer Energie, die über mindestens eine Elektrode in das Ofeninnere (0i) eingebracht wird. Hierbei weist der Reduktionsofen (1) in einer luftabgedichteten Bauweise eine Chargieröffnung (3) für Beschickungsmaterial auf, das über eine Beschickungseinrichtung (4) transportiert wird, wobei die Chargieröffnung gleichzeitig auch als Abgasleitungsöffnung (3) für das entstehende Gas dient.
Abstract:
A method and an apparatus (50) for producing direct reduced iron (37) from dry pellets (25) composed of iron oxide and carbonaceous material. A mixture of pellets (25) and free coke particles (38) with weight relation from 3:1 to 5:1 is fed into the top of an electrothermal fluidized bed (32) that is fluidized by nitrogen. By exposing pellets (25) in the electrothermal fluidized bed (32)to temperatures of between approximately 850-1,100°C for an average period of between approximately 15-60 minutes, the volatiles are removed and the pellets (25) metallized. Reduced pellets (37) mixed with free coke (38) are discharged from the bottom of fluidized bed (32) and cooled. The reduced iron pellets (37)are physically separated from any free coke (38) and the free coke (38) is recycled back into the fluidized bed (32).
Abstract:
A submerged arc furnace (10) produces foundry iron from scrap iron and steel sources where little or no slag is produced. Scrap iron or steel is fed into the submerged arc furnace (10) with a source of silica and a carbonaceous reducing agent. The scrap iron and steel is melted while simultaneously smelting the silica in the presence of the carbonaceous reducing agent. The amount of the silica source and carbonaceous reducing agent are added in an amount to selectively control the silicon and carbon content of the resulting foundry iron.
Abstract:
The invention relates to a method for producing titanium oxide-containing slag and pig iron from ilmenite. The method is characterized in that it comprises the steps: a) pre-reducing ilmenite in the presence of reductant in a prereduction reactor to metallize at least part of iron in the ilmenite; b) optionally removing unreacted reductant and gangue from the pre-reduced ilmenite; and c) smelting the pre-reduced ilmenite in an electric arc furnace to separate titanium oxide into a molten slag phase and pig iron into a molten metal phase. The invention also relates to a plant for titanium oxide-containing slag and pig iron production from ilmenite and to titanium oxide-containing slag and pig iron.