RU2015108009A

RU2015108009A - METHOD FOR HEATING METAL CROWBAR IN A SHAFT ARC MELTING FURNACE AND A BURNER FOR ITS IMPLEMENTATION

Info

Publication number: RU2015108009A
Application number: RU2015108009A
Authority: RU
Inventors: Юрий Николаевич Тулуевский; Ильяз Юнусович Зинуров
Original assignee: Юрий Николаевич Тулуевский; Ильяз Юнусович Зинуров
Priority date: 2015-03-06
Filing date: 2015-03-06
Publication date: 2016-09-27
Also published as: RU2612472C2

Abstract

1. Способ нагрева металлического лома в шахтной дуговой сталеплавильной печи, включающий загрузку металлического лома в шахтный подогреватель, примыкающий к дуговой сталеплавильной печи и его нагрев, периодическую выгрузку нагретого лома с помощью толкателя из шахтного подогревателя через окно выдачи лома в рабочее пространство дуговой печи, дальнейший нагрев лома, его расплавление и нагрев металлического расплава дугами и отвод образующихся в рабочем пространстве печи технологических газов через сводовый патрубок на газоочистку, отличающийся тем, что горючую смесь, используемую для нагрева металлического лома и состоящую из газообразного топлива, кислорода и балластных продуктов горения, охлажденных после прохождения через слой лома в шахтном подогревателе, готовят в горелочном устройстве и подают в нижнюю часть шахтного подогревателя.2. Способ по п. 1, отличающийся тем, что охлажденные балластные продукты горения из верхней части шахтного подогревателя эжектируют в горелочное устройство кислородом с помощью инжекторов.3. Способ по п. 1, отличающийся тем, что охлажденные балластные газы после прохождения через слой лома в шахтном подогревателе в количестве, равном количеству продуктов горения газообразного топлива, поступающего в горелочное устройство, удаляют после смешения с технологическими газами в рабочем пространстве печи через сводовый патрубок, а остальное количество балластных газов подают в горелочное устройство.4. Способ по пп. 1 и 2, отличающийся тем, что разрежение создаваемое инжекторами в 3-5 раз превышает разрежение, создаваемое системой удаления газов из рабочего пространства печи.5. Горелочное1. A method of heating scrap metal in a shaft arc steelmaking furnace, including loading scrap metal into a shaft heater adjacent to the arc steel furnace and heating it, periodically unloading the heated scrap using a pusher from the shaft heater through a window for dispensing scrap to the working space of the arc furnace, further heating of the scrap, its melting and heating of the molten metal by arcs and removal of the process gases generated in the working space of the furnace through the arch pipe to the gas treatment, from characterized in that the combustible mixture used to heat scrap metal and consisting of gaseous fuel, oxygen and ballast products of combustion cooled after passing through the scrap layer in a shaft heater is prepared in a burner device and fed to the lower part of the shaft heater. 2. A method according to claim 1, characterized in that the cooled ballast combustion products from the upper part of the shaft heater are ejected into the burner device with oxygen using injectors. The method according to claim 1, characterized in that the cooled ballast gases after passing through the scrap layer in the shaft heater in an amount equal to the amount of combustion products of gaseous fuel entering the burner device are removed after mixing with the process gases in the working space of the furnace through the arch pipe, and the remainder of the ballast gas is supplied to the burner. 4. The method according to PP. 1 and 2, characterized in that the vacuum created by the injectors is 3-5 times higher than the vacuum created by the system for removing gases from the working space of the furnace. 5. Burner

Claims

1. A method of heating scrap metal in a shaft arc steelmaking furnace, including loading scrap metal into a shaft heater adjacent to the arc steel furnace and heating it, periodically unloading the heated scrap using a pusher from the shaft heater through a window for dispensing scrap to the working space of the arc furnace, further heating of the scrap, its melting and heating of the molten metal by arcs and removal of the process gases generated in the working space of the furnace through the arch pipe to the gas treatment, from characterized in that the combustible mixture used to heat scrap metal and consisting of gaseous fuel, oxygen and ballast combustion products cooled after passing through the scrap layer in a shaft heater is prepared in a burner device and fed to the lower part of the shaft heater.

2. The method according to p. 1, characterized in that the cooled ballast combustion products from the upper part of the shaft heater are ejected into the burner device with oxygen using injectors.

3. The method according to p. 1, characterized in that the cooled ballast gases after passing through the scrap layer in the shaft heater in an amount equal to the amount of combustion products of gaseous fuel entering the burner device, are removed after mixing with the process gases in the working space of the furnace through the vault pipe, and the remaining amount of ballast gas is fed into the burner device.

4. The method according to PP. 1 and 2, characterized in that the vacuum created by the injectors is 3-5 times higher than the vacuum created by the system for removing gases from the working space of the furnace.

5. Burner device for heating scrap metal in a shaft arc steelmaking furnace, comprising a housing, oxygen and gaseous fuel inlets, characterized in that it comprises an oxygen chamber located in its upper part with an oxygen supply, an upper mixing chamber for oxygen and ballast gases, connected with nozzles for the intake of ballast gases from the upper part of the shaft, as well as a gas fuel chamber with a gas supply and a lower mixing chamber for ballast gases, oxygen and gaseous fuel, connected by nozzles to the lower part of the shaft heater, characterized in that the upper and lower mixing chambers are connected by injectors located inside the housing.