RU2344178C2 - Stationary charge distributor of tarasov - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention refers to iron and steel industry and can be implemented for charging of blast furnaces. The device contains successively assembled two-hopper funnel with an outlet aperture, and a hollow bar with a small cone forming with a cap a gas seal. Side and interior cross walls of the receiving funnel are made convex and inclined at the angle of 45-55° to horizontal. Prominence of the side and interior cross walls of the receiving funnel amounts to 1/3-1/5 of its height. The hollow bar of the smaller cone is made with an alternate boss-calibrator at the height of the outlet aperture of the receiving funnel. The ratio of the upper and lower diameters of the boss-calibrator is 0.7-0.85 and 0.5-0.6 correspondingly to the diameter of the outlet aperture of the receiving funnel.

EFFECT: simplification of design and increased uniformity of circumferential and radial distribution of charge.

2 cl, 2 dwg

Description

The invention relates to ferrous metallurgy and can be used to download blast furnaces.

A known design of a rotary charge distributor (VRS) of a typical design, containing a receiving funnel, a rotating funnel with a drive, support and support rollers for fixing the funnel during its rotation, a small cone suspended on a hollow rod with a thrust bearing for its rotation with a rotating funnel. See Tarasov V.P. Gas dynamics of a blast furnace process, 2nd ed., Revised. and add., Moscow: Metallurgy, 1990, 216 p.

Stationary charge distributors (SRS), which do not have rotating units and parts, are also known.

The closest technical solution - the prototype of this SRS - is a loading device (storage device) with a petal charge distribution (LRS), which contains a 2-hopper receiving funnel, a bowl with a small cone, which is an upper gas shutter, and a hollow rod of a small cone. See Ilchenko V.I. The device and operation of the two-cone filling apparatus with a petal charge distributor. / Ilchenko V.I., Donskov E.G., Gvozdik S.V. // Tr. International Congress of Domenists, Dnepropetrovsk-Kryvyi Rih, 1999, p.374-377.

In this prototype with LRS due to the narrow hole between the petals in their extreme position, a fairly uniform circumferential distribution of the charge occurs. After some time, sufficient to completely pour the mixture through a narrow hole between the rod of the small cone and the petals, the latter diverge and large objects, if they were there, wake up on the upper small cone.

The disadvantage of the prototype is the passive participation of the receiving funnel in the district distribution of the charge. The receiving funnel plays the role of a watering can. A narrow outlet does not contribute to a uniform circumferential distribution of the charge. Also, the large height of this design increases the amount of little things in the blast furnace.

A stationary charge distributor is proposed, in which, by changing the design form of structural elements, simplification of the design is achieved and a more uniform circumferential and radial distribution of the charge is provided, comprising a successively mounted receiving two-hopper funnel with internal transverse walls and an outlet, a hollow rod with a small cone forming with a bowl gas shutter, characterized in that the lateral and internal transverse walls of the receiving funnel are convex and inclined mi at an angle of 45-55 ° to the horizontal, while the convexity of the side and inner transverse walls of the receiving funnel is 1 / 3-1 / 5 of its height, and the hollow rod of a small cone is made with a variable thickening-calibrator located at the height of the outlet of the outlet funnel , with the possibility of lowering the small cone with stops, the height and time of which depend on the particle size distribution and the mass of the loaded charge, and the ratio of the upper and lower diameters of the thickening-calibrator is 0.7-0.85 and 0.5-0.6, respectively, of the diameter at final year at the opening reception of the funnel.

In addition, the lowering of the small cone occurs with the first stop of the small cone, the duration of which is 15-20 seconds, when lowering 0.11-0.17 from the course of the small cone, and the second stop of 5-10 seconds is 0.2-0 , 3 from the course of the small cone.

In the drawings (FIGS. 1, 2), a general view of the present SRS and a section of the receiving funnel with the shown inner transverse and convex side walls are shown.

The present stationary charge distributor (FIG. 1) consists of a housing of the receiving funnel 1 with an outlet 2. The mixture is poured into the receiving funnel from the skip 3, tipping over on the deflector part 4 of the inclined bridge (not shown in FIG. 1). The hollow rod 5 of the upper small cone 6 has a thickening-calibrator 7 to reduce the free cross section 8 of the receiving funnel 1. When lowering the upper small cone 6, the free hole 8 of the receiving funnel 1 increases and oversized pieces of the charge 9 freely pass through this hole. The capacity above the upper cone 6 and the bowl 10 is limited by the surface 11, based on the gas shutter 12. The inner transverse walls 13 and 14 of the receiving funnel 1 are made convex and inclined at an angle (α) of 45-55 ° towards its end walls; the bottom 15 of the side walls of the receiving funnel is beveled at an angle (β) of 48-53 °, and the bottom 16 from the end walls is also beveled to the outlet at an angle of (γ) 47-48 ° (figure 2).

The work of the secondary school is carried out as follows: the loaded skip 3 rises up, tilts on the deflector part 4 of the inclined bridge (not shown in Fig. 1). The mixture when rashing from the skip 3 is discarded to the end walls by the inner transverse walls 13 and 14 (figure 2). When moving along inclined bottoms 15 and 16, the materials are dispersed and distributed fairly evenly over the mass and particle size distribution along the circumference of the free section 8 between the calibrator 7 and the outlet 2 of the receiving funnel 1.

Further averaging of the mixture by mass and particle size distribution occurs when it is poured with accumulation through the narrow free section 8 of the outlet of the receiving funnel 1, since the rate of discharge of the mixture from the skip is much higher than the rate of its pouring through the narrow hole 8.

While lowering the upper cone 6 by 900 mm (cone stroke), the thickening-calibrator 7 on its rod 5 also falls by 900 mm and the free section 8 increases, as a result of which all oversized pieces wake up onto the small cone 6. Further loading is carried out in the usual way, with additional averaging of the charge when moving along the generatrix of the small and large cones.

The proposed design of this stationary charge distributor has a lower cost compared to the prototype, a small height, provides a more uniform circumferential distribution of the charge with a more complete use of the thermal and reducing ability of the furnace gases. Coke consumption when using this SRS is reduced while increasing the productivity of blast furnaces.

Claims (2)

1. A stationary charge distributor containing successively mounted receiving two-hopper funnel with internal transverse walls and an outlet, a hollow rod with a small cone forming a gas shutter with a cup, characterized in that the side and internal transverse walls of the receiving funnel are convex and inclined at an angle of 45 -55 ° to the horizontal, while the convexity of the side and inner transverse walls of the receiving funnel is 1 / 3-1 / 5 of its height, and the hollow rod of the small cone is made with an alternating thickening -calibrator located at the height of the outlet of the receiving funnel, with the possibility of lowering the small cone with stops, the height and time of which depend on the particle size distribution and the mass of the loaded charge, the ratio of the upper and lower diameters of the thickening-calibrator is 0.7-0.85 and 0.5-0.6, respectively, from the diameter of the outlet of the receiving funnel. 2. The stationary distributor according to claim 1, characterized in that the hollow rod of the small cone is configured to first stop the small cone when lowering it by 0.11-0.17 from the travel of the small cone lasting 15-20 s and the second stop when lowering it is 0.2-0.3 from the course of a small cone lasting 5-10 s.

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