SU43906A1 - Horizontal air cooler for blast furnace - Google Patents

Description

The proposed horizontal air cooler for a blast furnace is provided in the manufacture of two cast iron, and in the manufacture of chamotte, one V-shaped channels, each having independent supply and exhaust air for using the heat of the latter.

In FIG. 1 shows a vertical section of a blast furnace with horizontal air coolers; FIG. 2 is a horizontal section of it according to AA in FIG. one; FIG. 3-longitudinal section of a refrigerator made of cast iron; FIG. 4-external view of it; FIG. 5 is a top view with partial section; FIG. b-cross-section on BB fig. five; FIG. 7 - longitudinal section of a chamotte refrigerator; FIG. 8-horizontal section of it; FIG. 9 is its external appearance; FIG. 10 is a cross-section along BV of FIG. eight.

Cast iron coolers 7 (Figs. 3-6) are trapezoidal plates having a taper both in a horizontal position (flat) and in a vertical section, which is made for the convenience of pulling refrigerators out of the furnace masonry in case of repair.

Inside the refrigerator (fig. 5, b) there are two channels for circulating cooling air. These channels are V-shaped and are separated from each other by cast-iron walls,

(226)

simultaneously molded with the whole body of the refrigerator.

In order to form a V-shaped second inner channel, there is a straight middle separate wall (Fig. 5) of the refrigerator.

The cross section of the channels is calculated according to the speed and amount of air required for cooling (to remove heat from the refrigerator). At the same time, air can simultaneously be supplied to the outer and inner cavities of the refrigerator by gas tubes attached to the cast-iron lid 2 of the refrigerator. The lid 2 of the refrigerator / has only five openings, of which two are for air supplying two for air exhausting pipes, and one viewing hole 72, covered with glass. Refrigerators have flanges by means of which the lid 2 of the refrigerator is connected to it with bolts on an asbestos cord. The air inlet and outlet tubes are connected to the lid 2 of the refrigerator by screwing them into the threaded holes of the lid. Each refrigerator is independently included in the section of the inlet and outlet air pipes (Fig. 1, 2). The firing is done by taps, for which with each refrigerator there are two inlet taps and two outgoing taps. All sectional tubes are canalized in eight vertical tubes, of which four are inlet and four are outlet. These pipes are installed on two horizontally arranged annular pipes (Figs. 1, 2), of which one is an annular pipe for cold air (supply air) and the other is an annular pipe for hot air. Cold air is blown by the fan into the annular tube.

To install cast iron coolers, when laying the lining after assembling the refrigerator and testing for airtightness under the pressure of one atmosphere, the refrigerator is placed together with the ends of the supply and discharge tubes on the chamotte solution, the tube output through the hole in the outer mine laying cycle, which is fixed with a steel embrasure 5 ( Fig. 4), attached to the casing of the mine. Thereafter, the refrigerator may be adventurous to the exhaust and intake section.

Caring for refrigerators during the exploitation of a blast furnace means that the latter are sufficiently cooled so that their temperature does not exceed 500 °, which can be seen through the viewing hole / 2 by eye. Regulation of heating should be carried out with the help of faucet open air on refrigerators. Refrigerators also need from time to time to blow from the dust settled in them from the air. In the event of deterioration of the refrigerator — the appearance of a crack — it is necessary to stop the inflow of air by disconnecting it from the section, and then take some measures in the lid of the refrigerator cover, i.e., grease the hole-crack with cast iron putty or completely mass from fireclay with refractory clay and continue to work on the same refrigerator with cooling through the internal channel. If this part of the refrigerator goes out of commission, it is possible to replace it with another, which seems feasible. Upon leaving the refrigerator, it is necessary to cover 2 it and put a hole in the embrasures of the refractory masonry of the outer lining cycle of the shaft.

Cast iron coolers are used for the refractory masonry of the upper part of the furnace shaft about 3 meters below the fourose rings.

The device of chamotte fridge (Fig. 7, 10) is the same with cast-iron refrigerators with the only difference that they have only one cooling V-shaped channel, for the formation of which chamotte wedge-shaped partition 7 is inserted (Figs. 7, 8, 10). This partition is inserted in the grooves of the body of the refrigerator on alabaster solution for the density of the connection with the body of the refrigerator. Refrigerators are made from chamotte finely milled plastic mass, like refractory bricks, and subjected to good pressing in fabricated molds and aging in them. Refrigerators have flanges, as shown in FIG. 7, 8, to which, by fastening, is attached a cast-iron cover 9 with three openings (Fig. 9), of which two are used for supplying and discharging air, and the third is for observation (the so-called viewing hole) and is covered with glass . To stiffen the flanges of the chamotte cooler, a metal collar 8 is sucked from the outside to them (Fig. 7, 8). Chamotted refrigerators are placed in the refractory masonry of the shaft of the furnace of the lower horizons of the mine before the steam.

Assembly and installation are the same as cast iron coolers. The difference is only in the method of repairing the refrigerator: if the refrigerator's snout is worn out or the refrigerator cracks, it is turned off from the section system. Open the lid, remove the separating chamotte partition and insert a suitable size brick on the mass, then insert the partition, shortening it by the appropriate amount, then close the lid of the refrigerator and turn on the air. Thus the fridge is running until wear. In the latter case, a hole in the external cycle of the shaft is laid with a refractory brick.

The subject matter of the invention.

A horizontal air cooler for a blast furnace, characterized in that, in order to exhaust air from the cooler through pipes for using the heat of the air, it is provided with two - in case of its manufacture from cast iron, or one in case of its manufacture.

from chamotte, V-shaped channels, each having a separate inlet and outlet of air.

$ Mrj

p; j;: rz: .i: fig 4