SU1049550A1 - Charging apparatus for blast furnace - Google Patents

Abstract

Sediment DEVICE DOMAIN NECHI comprising in sequence the receiver loaded charge with gazoshihtovymi valves and the distributor of the charge along the furnace circumference, composite cylindric funnel connected flanges axial funnel accumulator charge positioned within funnel movable vertically cones with the working surfaces of the charge distributor radially furnaces in the form of a set of coaxially arranged conical guide funnels, characterized in that, in order to improve the distribution of the charge reduce manufacturing costs, it is further provided with a flat contact rings in the form of conical mantle arranged around the working poverhi NOSTA cones and regulators flow batch made in the form vertices (A tikalno-movable plates located block circumferentially distribute ate pshhty radially.

Description

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The invention relates to ferrous metallurgy and can be used as equipment for loading and distributing the charge into a blast furnace. A charging apparatus is known for loading and distributing the charge into the blast furnace, comprising cones and gas sealing valves, a charge distributor around the circumference and for the sake of the furnace, a gas lock and a double-volume charge storage device l. However, this charging unit cannot be used in modern blast smelting conditions and is difficult to manufacture. The closest to the invention in technical essence and the achieved result is the blast furnace charging apparatus containing successively located receiving device of charge loaded with gas charge valves and distribution of charge mixture around the circumference of the furnace, composed cylindrical funnels connected with flanges, axial funnel of charge accumulator moving cones vertically moving cones with working surfaces, charge distributor along the furnace radius in the form of a set of coaxially arranged conical Cz. A disadvantage of the known charging apparatus is the laboriousness of manufacturing because of the uniqueness of its components for each blast furnace, for example for blast furnaces of 1033, 1230, 1719-, 2000 and 2300 m3, each of which has a unique design of the filling apparatus with a large cone diameter 4,200, 4,500, 4,700, 5,000, 5,400 and 5,800 mm and, respectively, the gas seal, CPP and receiving hopper. To modernize the boot devices, significant investments are needed in the design, manufacture, research and development of the experimental design to an industrial sample and install it on each furnace. To solve the unification problem, it is necessary to create a design of a load device consisting of separate units and allowing only their number to be changed. The purpose of the invention is to improve the charge distribution and reduce manufacturing costs. The goal is achieved by the fact that in the blast furnace ambulatory apparatus, containing successively located receiving device of the loaded sheath Tfj with gas-loading valves and charge distributor around the circumference n, are integral flange-mounted conical funnels located inside cones with working surfaces, the charge distribution valve along the furnace radius in the form of a set of coaxially arranged conical guide cones, are additionally provided with tight contacts GOVERNMENTAL rings in the form of conical mantle arranged around the working surfaces of the cones and flow regulators Shih / r. you, made in the form of vertically movable plates arranged blockwise around the periphery of the charge distributor along the radius. , FIG. 1 shows the device, a general view in section; in fig. 2 is a view A of FIG. 1; on fig. 3 - section BB in figure 1 {turned 90); in fig. 4 - section BB in f, 1; in fig. 5 and b - unified backfill units. The filling device contains two gas-charge valves 1, a batch distributor 2 around the circumference, a conical funnel 3 (tapering upwards), a cylindro-conical funnel 4 made of a component of repetitive-sized parts (three components in the design of the charging unit), an axial funnel 5 of a two-volume storage bin. , distributor b tschkhty along the radius of the blast furnace, two small cones 7 and regulators 8 consumption of the charge. The regulators are located blockwise on the distributor case 6f around the lower small cone 7 and serve to perform one-sided loading of the charge (to eliminate the channel course of the furnace). There may be three, four six or eight pieces and they are located circumferentially around the lower cone. Regulators consist of a piston actuator with a rod and a cutting plate. Under the piston is installed a reverse spring. The regulators are constantly in the upper position and only in cases of a breakdown of the blast furnace with their help do they concentrate the one-sided loading of the charge into the furnace. The downward stroke of the regulators does not exceed 500 mm; they may not reach the surface of the upper bowl of the radial distributor by 80–200 mm. The width of the cutting plates was -, em 700-800 mm. Plates are suspended vertically and may have guide grooves in the radial distributor brackets of the charge. The design of the regulators is block-shaped, hermetically sealed, and has a fitting for the supply of energy carrier (gas pair) on top. Contact® ring 9 is made in the form of a conical shell and is framed by a flat diaphragm. The operation of the device is as follows. At the approach of the left or right skips, one or the other cooi BeTCTBeHHo gas charge valve opens, the mixture is poured out through the window onto the inclined trays of the distributor 2, having a different direction of the inclined bottoms. The charge stream is first divided by a vertical divider into two parts, and then these parts of the charge fall on inclined bottoms of different lengths and directions and are split into two more parts. Thus, the charge of one skip is divided into four parts and dispersed around the circumference of the conical funnel 4. The first portions of the dispersed charge around the circumference meet the conical narrowing of the bottom of the funnel 4, relatively evenly from one side around the circumference of the small cone. With the approach of another skip, the flow of the charge and its distribution around the circumference of the upper small cone is repeated on the other side. Having loaded two or four skips of the charge, on the upper small cone and closing the valves, equalize the pressure to the interconus (or more by 0.01 atm) and load the mixture into a two-body storage tank (separately and then sinter, or coke - depending on the given program). When unloading the charge through the lower cone, the speed of lowering the lower small cone and the discharge station of the charge vertically, i.e. set the required discharge radius of the charge into the blast furnace (depending on the distribution of the gas flow over the cross section of the furnace and the heat floor). To feed the charge into the given top section around the circumference and radius of the top section, steam or gas is fed into the regulator chamber 8 (into the piston space), the piston overcomes the spring force and moves the stock with the cutting plates down. The plates, which do not reach 80-100 mm from the surface of the upper bowl of the radial distributor b, stop at the lower end position. One of the plates in a given sector must be in a raised position and therefore the entire supply (4-6 skips) gets concentrated in a given sector of the furnace. Regulators 8 work only in the case of a disorder in the course of a blast furnace. Due to the presence of two small cones of typical design with a diameter of 2000 mm, the mixture distributes around the circle uniformly. In the charging device, the cylindrical conic funnel is made of a composite, of parts of repeated diameter (d, Ei, D) and height (H, h). The necks of the conical parts of the smaller flanges associated with the contact ring and gas-sealing and distribution of the charge. The necks of the cylindrical parts are connected by large flanges. The contact ring of the gas sealing unit is made in the form of a conical shell, fitted with a flat diaphragm. The radial distributor is equipped with charge controllers. The charge flow controller is made in the form of vertically movable plates with an individual drive. Regulators Torah Bloch-. but are located around the lower small cone along its periphery and are fixed on the horizontal plane of the case of the radial distributor of the charge. The use of the invention provides a reduction in the cost of manufacture and installation, as for blast furnaces with a useful volume of 1033 - 3200-M metal construction is assembled from conical and cylindro-conical funnels of the same repeated size (diameter and height), typical small gaskets with a diameter of 2000 mm (two in each backfill) and gas discharge valves (of a uniform design for all blast furnaces with a window diameter of 1200 zvcv- :). In addition, for a small cone, unified nye gazouplotnitelnogo ring structure and charge flow rogul torus. The invention provides for the exclusion from the device of a unique design of a large cone and its bowl (diameters 4200 - 7000 mm); unification of gas sealing agents (small cone with a diameter of 2000 mm, gas sealing ring, gas charge valve 1200) and metal structures of the charging device (gas closures and receiving hoppers); reduction of the reconstruction time of loading devices and their technical characteristics in accordance with modern requirements, as well as the operational management of the charge of the charge to a given sector of the furnace to eliminate the outlined channel for the passage of gases. The economic effect of using the invention will be at least 200 thousand rubles for an average taper plant. in year.

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Claims (1)

FILLING BLOCK OF A DOMAIN ICE, containing a successively arranged receiving device of a loaded charge with gas charge valves and a charge distributor around the circumference of the furnace, composite cylindrical funnel connected by flanges, an axial funnel of the charge store, located inside the funnel vertical cones with working surfaces along the radius of the furnace distributor in the form of a set of coaxially arranged conical guide funnels, characterized in that, in order to improve the distribution of the charge and lower As a result of manufacturing costs, it is additionally equipped with flat contact rings in the form of conical shells located around the working surfaces of the cones, and charge flow controllers <g, made in the form of vertically movable plates located blockwise around the periphery of the distributor charge radius.