摘要:
A briquette for addition to the charge in a steelmaking or ironmaking furnace includes at least 15% by weight of magnesium carbonate, and a binder.
摘要:
A method of starting a molten-bath based melting process includes establishing a sufficiently large and stable “hot zone” for ignition of oxygen and coal in a main chamber of a smelting vessel by independent means, i.e. independently of and before supplying cold oxygen and coal into the main chamber.
摘要:
A briquette for addition to the charge in a steelmaking or ironmaking furnace includes at least 15% by weight of magnesium carbonate, and a binder.
摘要:
A method and a device for balancing out amount fluctuations while simultaneously increasing the temperature of an export gas (2) used in a reduction process (1). A first partial amount (3) of a recycling gas (4) is cooled in at least one recycling-gas cooler (5) to form a cold recycling gas (6) and the cold recycling gas (6) is fed to the export gas (2) in a pressure-controlled and/or amount-controlled manner in order to balance out amount fluctuations of the export gas (2). A second partial amount of the recycling gas (4) is fed to the export gas (2) as hot recycling gas (7) having a higher temperature than the cold recycling gas (6). Then an export gas mixture (8) of the cold recycling gas (6) and the hot recycling gas (7) is introduced into the reduction process (1), wherein the temperature of the export gas mixture (8) is higher than the temperature of the export gas (2). The temperature of the export gas (2) or of the export gas mixture (8) is set in such a way that temperature is higher than the dew point or dew point temperature of the export gas mixture.
摘要:
The invention relates to a method of integrating a plurality of blast furnaces with a plurality of air gas separation units, in which the replacement blower available on the blast furnace site is used to feed compressed air into an air gas separation unit making it possible to enrich the blast-furnace blast with oxygen, this unit being stopped when one of the blowers of the blast furnaces has to be replaced with the blower used by the air gas separation unit.
摘要:
The invention relates to a method and device for supersonically injecting oxygen into a furnace, in particular a cupola furnace, in which the total oxygen required for the furnace operation is injected with the aid of two distinct circuits, i.e., the first circuit comprising at least one supersonic oxygen injecting nozzle and a second circuit which comprises additionally oxygen injecting means and is connected to the first circuit by pressure-sensitive means, such as a discharging device (or upstream pressure adjuster), in such a way that a stable pressure is obtained in the first circuit upon the attainment of the maximum flowrate thereof, wherein the first circuit can consists of several supersonic nozzle groups.
摘要:
In an integrated process an air separation unit A receives compressed air from the compressor S of a blast furnace B and the compressor K of a gas turbine C. Nitrogen enriched air N from the air separation unit is sent to the gas turbine and oxygen enriched air O from the air separation unit is sent to the blast furnace.
摘要:
A method of conducting a process involving the generation of steam in which a hot process stream is generated. The hot process stream can be generated in any manner and can include a burner section of a steam methane reformer, a gas turbine of an integrated combined cycle, a combustion chamber used to pre-heat incoming air and oxygen for a blast furnace, an oxygen transport membrane system, and a gas turbine or natural gas engine that provided to compress air in a cryogenic air separation unit. Heat from the hot process stream is transferred to a thermoacoustic engine to recover work at high temperatures and to generate an intermediate temperature process stream therefrom. The intermediate temperature process stream is introduced to a steam generator to generate the steam.
摘要:
A process for smelting metallic raw materials in a shaft furnace having beds of metallic raw material and coke comprises injecting concurrently into the shaft furnace (1) a mixture of flue gases and oxygen at a subsonic velocity and (2) preheated oxygen at supersonic velocity wherein the supersonic velocity oxygen is injected into the coke bed.
摘要:
A method and apparatus for direct steel making in a blast furnace wherein a continuous flow of process ingredients including iron ore is directed in a descending tortuous path through reduction and combustion zones which are maintained in the shaft of a blast furnace.