SU985042A1 - Loader for blast furnace - Google Patents

Description

(54) LOADING DEVICE OF A DOMAIN FURNACE

one

This invention relates to ferrous metallurgy, in particular to the equipment of blast furnaces.

A blast furnace charging device is known, consisting of a two-bunker receiving funnel, a conical distribution funnel with curvilinear blades inside, communicated with its rotational drives around the furnace axis, as well as upper and lower cones contacting Q with the E1J bowls.

The disadvantage of this design of the loading device is that a distribution funnel from the skip serves a portion of the same material (5 (sinter or coke), so the bale is laid on cones and subsequently along the height of the furnace layer by layer (sinter layer, coke layer). agglomerate in the peripheral zone 20 and the middle zone. This is sweat (the first is that the specific gravity, the agglomerate is 4–5 times greater than the specific weight of coke. The concentration of coke in the central

the zone of the throat has a negative effect on the furnace's progress, contributes to the central gas flow, a significant level of central depression of the i-oa of intense coke burning in this zone. This leads to an increased consumption of coke and snookensho technical economy of blast smelting indices.

The closest in technical essence and the achieved result to the proposed is the charging device of the blast furnace, which includes two blast chutes with chutes, the holes of which are made in the form of semicircles converging along the diameter, which form the common outlet in two cargo dampers kinematically connected with a synchronous rotation drive and a cnshshrichsky distribution element with screw guides, a cone locking device C 2}.

This design of the loading device makes it possible to improve the radial and circumferential distribution of the material.

 however, it cannot be applied in modern blast furnace operation.

The purpose of the invention is to mix various materials with modern loading into the furnace, and to improve the distribution of materials at the furnace top.

This goal is achieved by the fact that in the boot device, which includes two receiving funnels with chutes, the outlet openings of which are made in the form of semicircles converging along the diameter, forming a common outlet hole in the form of a circle, two cargo dampers kinematically connected with the synchronous rotation drive and distribution element with screw guides, tapered backfill apparatus, output axis (SfSSpDf and leakage is offset by 2, O-2.9 of its radius, and the element is equipped with two screw guides a is equal to 0.5 of the pitch of the guides. Due to the fact that during the synchronous opening of cargo dampers, the flow of the charge from the bunkers loaded with dissimilar material falls on the screw surfaces of the distributor element and is then poured into the rotating distributor of the charge, the coke and the sinter are mixed and equal but are distributed over the surface of the lash. Achieving through the proposed device a positive effect, superior to the effect obtained using known solutions (mixing the opposite the material and improving its distribution at the top) is due to the fact that the axis of the common outlet of two receiving funnels (the cargo dampers of which are connected with the synchronous opening drive) is shifted relative to the axis of the furnace by an amount (2 - 2.9) R (where R is the radius of the common outlet orifice) and the distributor element has two diametrically located screw guides, and its height is equal to 0, 5 steps of the screw guides. Without displacing the axis of the common hole of the two leakage hoppers of the receiving hoppers, it is impossible to achieve the effect of mixing two different materials by means of conical loading devices. This is due to the fact that when the axis of the said hole is located on the axis of the furnace, the dissimilar charge materials passing from the two funnels pass through

The distribution element and are laid on the surface of the charge of the charge distributor by stretched around the circumference layers of the material of the same name.

Claims (2)

In the proposed device, the mixing of opposite materials occurs due to the fact that when mixing the common outlet of the leak funnels, the material comes out of them in a circular stream. consisting of two semicircles of the opposite material, it passes along the guiding screw surfaces of the rotating distribution element and expires on the lashing surface of the rotating distributor it is more expedient to feed the broadband to the circular zone located at the funnel. In order to obtain a uniformly mixed layer of unlike material on the distributor funnel surface, the distribution element must have two screws for the guides, and its height must be such that the angle of rotation of the guides in the horizontal plane is 18 °. This is due to the fact that with increasing amount of i. screw guides do not improve the mixing of opposite materials, since the division of the jet of material in the distribution element on the number of flows more than two practically does not affect the pattern of material fitting on the surface of the embankment. However, an increase in the number of utsazannyh surfaces leads to a decrease in the flow areas of the cavities formed by them, which leads to the sharpness of the material moving in them. The angle of rotation of the screw guide surfaces of the distribution element must be equal to ISO (and its height is equal to the pitch of the helical surfaces) because a smaller value of the material passes through the distribution element in transit, which will worsen the mixing of materials; at an angle greater than 180 °, there will be no improvement in mixing, but a flow resistance; its movement will increase, which is not desirable, as the throughput of the distribution element decreases. FIG. 1 shows the boot device, the total wad; in fig. 2 - cut. A-A in FIG. Ij in FIG. 3 shows a section BB in FIG. one; in fig. 4 shows a section 59S in FIG. one; in fig. 5 is a view along arrow D of FIG. 1 in FIG. 6 - sections LP and E-E5. The loading device consists of a charging device, including a large cone 1, suspended on rod 2 and the entrance shi in contact with the bowl 3-, conjugated with gas 1 gate 4, distribution of charge mixture, including a small cone 5, suspended on rod 6 and contact with a bowl 7, on which a funnel 8 is installed (whose effective volume is equal to the volume of two skips of material), as well as a receiving funnel consisting of two bunkers 9 and 10. The receiving bins of the receiving bins 9 and 10 are filled with shoo-5tstsimis, and their outlets have semicircles arranged so that together they form a common outlet in the form of a circle (see Fig. 4). The radius of the circle is chosen from the condition that the charge is not within the range of f 60 0 -7 6 mm. It is impractical to take mm, as the dimensions of the distribution element increase and the mixing of the material deteriorates due to the increase in the cross section of the material jets, which flow into the distribution element. The vertical axis of the outlet is displaced relative to the axis of the furnace by a distance of about (. In the lower part of the estrus, the bunkers 9 and 10 are equipped with cargo gates 11 and 12 mounted on shafts 13 supported on the podshshshikovye units attached to the bins (see. Figure 3}. At the ends shafts 13, which are interconnected with each other and with hydraulic main 16, are mounted on the shaft 13 (the synchronous rotation of the dampers can also be operated according to another scheme). A cylindrical distributing element 17 is mounted coaxially with the outlet of the receiving funnel, supporting The support element 17 is designed as a hollow cylinder with two screw guiding surfaces arranged on it, by means of a gear ring and connected to the rotational drive gear 19 of its vertical axis, and the ural axis. surfaces with a cylinder to a horizontal plane of at least З2 (this is due to the fact that the angle of repose of the charge is 2832). The diameter of the cylindrical part of the distribution element (see Fig. 6) is selected from the condition Dg 2 R, the height is calculated so that the angle of rotation of the screw guides in the horizontal 42 "plane is 18 O" (see Fig. 5). Powered boot device SLV "blowing o6pia30M. Unlike charge material (separately sinter and coke), by means of skips 2O are alternately loaded into bunker 9 and 10 of the receiving hopper. At the same time, cargo shutters 11 to 12 watches with in the closed position. Next, the dampers 11 and 12 synchronously open the charge material with two streams of opposite material, constituting a common circular jet in cross section, feeds the distribution element 17 into the rotating at the same time. By changing the direction of flow of the opposite materials in the rotating distribution element the guide helical surfaces, the coke and the agglomerate are mixed and poured into the funnel 8 of the distributor. This batch dispenser (parts 5-8) can operate in two modes: in constant rotation when the charge is poured into it (during the normal course of the furnace), and by station (in the event of a channel passage of the furnace). In the first case in the funnel the distributor gets a uniform circumferential charge distribution. In the cross section of the slurry of the charge and the distributor has the form of mixed materials of different names. Such loading of the material will eliminate the appearance of coke sintering with agglomerate. This will eliminate the movement of coke in the radial direction and the process of lowering the entire charge column to the furnace hearth. The coke heat output will significantly improve, since its pieces are evenly surrounded by agglomerate. This allows coke consumption to be reduced due to more rational use of gas psgc and str; furnace stroke. Thus, the proposed design of the blast furnace charging device makes it possible to improve the distribution quality of the charge mixture, which will reduce the coke by 1%. Claims of a blast furnace charging device, including two chutes receiving funnels, the outlet openings of which are made in the whole of semi-circles connected in diameter, forming a common outlet in the form of a circle, two cargo dampers, kinematically connected with a synchronous rotation principle and a solid distributing element with screw guides and a conical charging apparatus, characterized in that, in order to mix dissimilar charge materials and improve distribution in the furnace top, the axis of the outlet opening is mixed with the axis of the furnace by 2.0-2 , 9 of its radius, - distribution provided with two diametrically located screw guides, while its height is 0.5 steps of the guides. Sources of information taken into account in the examination 1, USSR Copyright Certificate No. 153289, KL.S 21 and 7/20, 1962. 2. German patent number 144530, cl. 18 A 6/01, 1903. -Uj j / €; V / J Bud g Sh i8 FIG. five