Insert piece of discharge tank in series type blast furnace

Abstract

The invention relates to the technical field of metallurgy smelting equipment, and provides an insert piece of a discharge tank in series type blast furnace. The insert piece comprises an insert piecebody and support rods, wherein one ends of the supporting rods are connected with the insert piece body, and the other ends of the supporting rods are fixed to the discharging tank; the insert piecebody is a combination body of any two of the a first part, a second part and a third part or a combination body of all three parts or only the first part; the first part is an upper cone or a tray, the second part is a column body, and the third part is a lower cone, an existing insert piece is relatively high in an installation position, the furnace burden is prone to be broken, the particle sizedistribution of the furnace burden in a material tank is not reasonable, so that the small particles are discharged out of the material tank late and fall near the center of a furnace throat. According to the insert piece, a series type tank 'funnel flow 'discharging mode and a particle size segregation phenomenon are based, by changing the shape of the insert piece and reducing the installationheight, the furnace burden is enabled to form a pile tip in a center area of the material tank, when the material tank is discharged, the effects that the small particles are discharged firstly, and the large particles are discharged late are achieved, and then the air permeability of a material layer in the furnace throat is improved.

Description

technical field [0001] The invention relates to the technical field of metallurgical smelting equipment, in particular to an insert for a cascading blast furnace blanking tank. Background technique [0002] At present, the bellless top equipment of blast furnace includes tank-merging type and tank-string type, 1000m 3 Most of the above-mentioned blast furnaces adopt the roof cloth of stringing cans, and even some 4000m 3 Class and above blast furnaces such as Baosteel also use string tank roof cloth. The centerlines of the upper and lower charging tanks of the string tank type bellless furnace coincide. When charging the lower charging tank, in order to prevent the furnace material from hitting the lower throttle valve, an insert is usually installed in the center of the material tank. The furnace material hits the insert first and then disperses. to the tank wall. [0003] like figure 1 As shown, the height of the current material tank insert body is about 1 / 2 of the ov...

AI Technical Summary

Problems solved by technology

Disadvantages: (1) Due to the high position of the insert, the furnace material needs to move at a higher distance and fall on the throttle valve, and its speed is relatively high, so the impact force on the throttle valve of the material tank is still relatively large

(2) During the process of gradually accumulating the charging tank, particle size segregation is prone to occur. Since the charging material is easy to form a pile tip at the falling point, the pile tip and its vicinity mainly gather small-sized particles of charging material, and large particles are easy to flow along the material pile. Inclined rolling down to the foot of the stockpile

There are many small particles in the center of the furnace throat, which is not conducive to the development of the central gas flow, which is not conducive to the guidance of the gas flow to the center of the blast furnace, and is not conducive to the active hearth center of the blast furnace; when there are many large particles near the furnace wall, coupled with the wall effect, it is easy to make The edge gas flow develops and scours the furnace wall, shortening the life of the furnace lining, making it difficult to operate the blast furnace, and affecting the longevity, high efficiency, energy saving and environmental protection of the blast furnace

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