SU1333965A1 - Burner for steel melting furnace - Google Patents

Abstract

The invention relates to ferrous metallurgy and m. used in steelmaking furnaces. The invention allows & a full combustion by early mixing of the fuel with the oxidant. The burner (H) is introduced into the furnace near the walls. In case 1 of the burner axially placed two pipes. One of them is supplied with gas that escapes through the nozzle 4, and the other through oxygen flowing through the nozzles 5 and 6. The nozzle 5 is made with a constant flow section (C). The nozzles 6 are made with variable pass C at an area (P) of the output C that exceeds the P input C of each of them, and are placed at a distance of 0.5-2.5 diameters of their decoder C, and the total P of their output C equal to 0.05-0.15 square C of the nozzle 5. The angle of inclination of the nozzles 4, 5 and 6 to the pipes is 50-58. The number of nozzles 6 is two to five, and P output C of each of them is 1.6 -3.0 P of its input C. Such an implementation allows for early ignition of the gas, its complete combustion and efficient heating of the charge in the entire volume of the furnace working space. 2 hp f-ly, 5 ill. i (L 6: СР со со о о: СП фцг.Т

Description

The invention relates to ferrous metallurgy and can be used in steelmaking furnaces.

The purpose of the invention is to increase the completeness of combustion of the fuel by ensuring early mixing of the fuel with the oxidizer.

Figure 1 shows the burner, a general view; figure 2 - section aa in figure 1 in fig.Z - section bb in figure 2; figure 4 - section bb In figure 2; on fig.Z - section GG on fig.Z.

The burner of the steelmaking furnace comprises a housing 1 with axial pipes 2 and 3 for supplying fuel and an oxidizer, respectively, provided with nozzles 4, 5 and 6 mounted at an angle to the corresponding pipes. All nozzles 6 for supplying the oxidant, except for nozzle 5, which is made with a constant flow section, are made with a variable flow section with an output section area exceeding the input section area of each of them, and are placed from the fuel nozzle at a distance equal to 0.5-2.5 diameters of their output sections, and the total area of their input sections is 0.05-0.15 of the nozzle 5 section with a constant flow section. In addition, the angle of inclination of all nozzles 4, 5 and 6 to pipes 2 and 3 is 50-58 °, and the number of nozzles 6 is two to five, and the output section of each of them is 1.6-3.0 of its area input section.

The burner works as follows.

A burner is introduced through an opening in the medium of an electric arc furnace into the working space near the walls. A pipe, 2 for supplying fuel, supplies gas, for example natural gas, which flows through nozzle 4. Oxygen is supplied through pipe 3 for oxidant supply, which leaves through nozzles 5 and 6.

Due to the presence of nozzles made with a variable flow section with an output section area exceeding the input section area of each of them, and placed at a distance from the Top Beer Nozzle

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0.5-2.5 diameters of their output sections, as well as the implementation of the total area of their input sections equal to 0.05-0.15 of the cross section area 5, ensures early ignition of the gas, its complete combustion in the working space and effective heating the charge in the entire volume of the working space.

After completion of the burner is removed from the working space of the furnace.

Thus, the application of the invention allows for optimal conditions for mixing the fuel and the oxidizer and complete combustion of the fuel, which reduces the duration of melting and energy consumption.

Formula la invention.

Claims (3)

1. A burner of a steel-smelting furnace, comprising a housing with axial pipes for supplying fuel and an oxidizer equipped with nozzles installed at an angle to the corresponding pipes, characterized in that In order to improve the completeness of the combustion of fuel, all nozzles for the supply of oxidant, except for one filled with a constant flow section, are made with a variable flow section with an output section area exceeding the input section area of each of them, and placed from the fuel nozzle at a distance constituting 0.5-2.5 diameters of their output sections, and the total area of their input sections is 0.05-0.15 of the nozzle section with a constant flow section. 2. Burner pop.1, different from the fact that the angle of inclination of all nozzles to the pipes is 50-58. 3. Burner pop.1, which differs from the fact that the number of nozzles with a variable flow area is 2-5. and the area of the output section of each of them is 1.6-3.0 of the area of its input section. AT AT 6-6 97i / e. 2 Bb GG turned Fig.Z Compiled by S. Gudkov Editor L. Veselovska Tehred.V. Kadar. Proofreader M. Demchik Order 3947/36 Circulation 494Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Fy FIG. five