SU901273A1 - Fixing assembly of cooling slab to blast furnace casing - Google Patents

Description

(54) KNOT OF FASTENING OF A REFRIGERANT PLATE TO THE COVER OF A DOMAIN FURNACE

I

The invention relates to ferrous metallurgy and can be used to fasten cooling plates for blast furnaces.

It is known to fix refrigeration plates to the blast furnace casing, in which the refrigerator is attached to the furnace casing with four conventional bolts, penetrating the entire cavity of the solid plate passing through the hole in the casing 1.

The known method of fastening is unreliable, since the bolts overheat, wear out and the plates break.

Closest to the described one is the fastening unit of the cooling plate to the casing of the blast furnace, which is made in the form of a hollow body with refrigerant pipes, side openings with studs located in them, rigidly mounted on the furnace casing 2.

; A disadvantage of the known fasteners are high thermal stresses at the site of contact of the assembly with the casing, their durability due to overheating and abrasion, as well as a large number of fasteners (bolts and pipes for supplying and discharging coolant), which weaken the casing of the blast furnace lead to cracking it ..

ten

The purpose of the invention is to reduce thermal stresses in the mount and, therefore, increase the durability of the refrigeration state.

The goal is achieved

IS by the fact that in the fixing unit of the cooling plate to the casing of the blast furnace, which is made in the form of a hollow body with coolant supply pipes, side holes

Claims (2)

20 with studs fixed in them, rigidly fixed on the furnace casing, the studs are made with an axial channel and radial holes, in the place where the studs abut against the inner wall of the casing of the plate is made tide with a socket, welded to the plate. At the same time, the outer end of the stud is rigidly articulated with the pipes of the refrigerant stock and is tightened with a nut. Figure 1 shows the site of the mount. The mount consists of a cooling plate I and a casing 2 of a blast furnace, a hollow stud 3, in the smooth part of which there are a series of through holes 4 connecting the cavity of the pin to the cooling cavity of the plate. One end of the stud is connected to the socket. The house of the tide 5 of the cooling plate, its middle part is welded to the cooling plate through the flange 6, and the other end of the stud is rigidly connected to the cooling liquid supply pipe 7 and the nut 8. The device operates as follows. The cooling fluid is supplied to the supply nozzle 7 and through the cavity of the stud 3 and the aperture 4 enters into the interior of the hollow plate 1 and cools it. With the help of the flange 6, the body of the stud 3 is welded to the cooling plate 1, thereby preventing it from falling out. In the wall of the cooling plate opposite to the casing, the tide 5 is made, in the socket of which the end of the stud enters and is held therein. The nut is screwed onto the threaded end of the hollow stud 3 and is welded to the casing 2 of the blast furnace, providing gas tightness throughout the entire campaign of the furnace. In connection with the constant increase in the volume of furnaces, the requirements imposed on the reliability and durability of the cooling plates of blast furnaces are increasing. The existing methods of fastening refrigerators: x plates do not satisfy the requirements of operation. In the refrigerator plates, there are constant thermal stresses and cracks, which makes the refrigerators malfunction, in order to switch off which the stove must be stopped, which leads to a decrease in the unit's performance. The proposed solution, in which a large number of fastening pins is replaced with two hollow fasteners, through the cavity of which the cooled fluid enters into the inside of the plates and back, reduces thermal stresses at the point of contact of the mount with the casing and, consequently, reliability and durability of refrigeration plates and, as a result, extend the life of the blast furnaces. The economic effect of using such refrigerators for only one blast furnace is 104 thousand rubles. in year. Claim 1. Fastening of the cooling plate to the blast furnace casing, which is made in the form of a hollow body with refrigerant supply pipes, side openings r "1" with spacers located therein, rigidly fixed on the furnace casing, characterized in that, in order to reduce thermal stresses in the mount and increase, consequently, the durability of the cooling plate, the studs are made with an axial channel and the radial ffl openings, while at the place of the stud’s abutment to the inner wall of the casing of the plate nezdom, outer end is provided with studs flants.em, raspolozhenn1m ppitoy between and welded to the casing and shshte. 2. Node pop. J, characterized in that the outer end of the stud is rigidly articulated with the coolant supply pipes and tightened with a nut. Sources of information taken into account in the examination 1. Andonev S.M. Cooling blast furnaces. M., 1972, p. 89 2. Authors certificate of the USSR 584036, cl. From 21 to 7/10, 1977.