SU1067048A1 - Blast furnace - Google Patents

Abstract

DOMAIN FURNACE, containing co-i zhuh. Cooling plates with fixtures and equipment, footers, shoool junards to compensatory gaskets, which, in order to increase the strength and depth of the furnace shaft design, will install an intermediate cover between the casing and the refrigerator with a gap relative to you, The neck of the annular sections with openings for free passage of the element of cold hopps and equipment is located, and between the annular sections there are installed compass gaskets, while the gap between the cold plates Tami and promezhutochshom casing are offset by vertokali.

Description

The invention relates to metallurgy, in particular, to blast furnaces or other shaft-type furnaces with a metal casing. The closest to the proposed technical essence and the achieved effect is a blast furnace, including a casing, cooling plates with clamps attached to it and equipment elements, a fuser , thermal insulation and compacted gaskets. The disadvantages of the known design of the blast furnace are: 1 durability and hope of the casing due to the need to thicken the sheets their and conical sides, the complexity of welding technology. When using thick-walled casing structures, the likelihood of cracking during excution, which c) weakens the design of the blast furnace, increases. The aim of the invention is to increase the strength, reliability of the construction and ns # K. This goal is achieved by the fact that in a blast furnace containing a casing, cooling plates attached to it with clamps and equipment elements, lining, heat insulating and compensating pads, mecha casing and cold are a | Plates are installed with a gap, with an intermediate gap, which is formed from ring gaps with openings until the skip plates and equipment are free to pass through, and between the ring gates there are compensatory gaskets installed, the gaps between the holes and the intermediate casing are 1 Wem na vertical. FIG. 1 schematically yeo (a domain is a furnace, a cut and its main KimctpyKTiiB elements; a a: 2 a cut A-A ya of Fig. 1; W (Fig. 3 - a fragment of the upper part of the halodal plate with a frame for laying the focus; on Fig. 4 is a unit in the f. 1c by fastening a cold shoe to the skin and the mutual arrangement of the intermediate casing and the refrigeration plates; in Fig. 5, section BB in Fig. 4. The blast furnace comprises a steel casing 1 an intermediate steel casing 2 cold plates 3 and lining 4 of refractory materials (shmot of aluminum clay, carbonaceous materials Ch.). Intermediate The steel casing 2 consists of separate horizontally separated sections. plates 3 and lining 4 is a compensation layer 6, which is made from various types of backfill, carbonaceous mass or other materials with good deformation properties. The small structural gap 7 between the portions of the intermediate casing 2 and the cooling plates 3 does not have a special filling. Refrigerating plates 3 are installed in such a way that between them there are vertical and horizontal gaps 8 (Figs. 4 and 5), filled with cast iron putty or a carbon seal. The sections of the intermediate casing 2 are installed at a height with gaps 9, in which compensating gaskets 10 are placed. Gaskets iO are made, for example, of metal tubes of small diameter with wooden plugs clogged in them. Horizontal gaps 9 and horizontal gaps 8 are filled with vertical mixing with respect to each other (Fig. 4 and 5). In the intermediate casing 2, holes P are made for free passage of the elements of the cooling plates 3 or elements of the log P1Zhbor, frames of cast-iron tap holes, hatches, fittings and other elements of the blast furnace equipment (not shown), which are fixed by welding only to the casing I. In the upper the corners of the cooling plates 3 there are grooves 12 (fig. 3) for laying the clips 13; in closed rings (Fig. 2). Fixato sh 13 is made of metal (steel, cast iron) or of fireproof material, such as chamotte. Tubes 14 for supplying and discharging a cooling agent (for example, water) under pressure and protective tpyfSKH 15 are monolithic in the body of the cooling plates 3. The cold plates 3 are attached to the casing 1 with steel holes 16 that are welded to the casing along the perimeter 1 with a seam 17, and along the edge of the aperture, the welded seam 18 is welded to the protective tube I. The fixture is made in the center of gravity zone 19 of the cooling plate 2 (Fig. 4). The presence of layer 5 (50-70 mm) between the casing I and the horizontal sections of the intermediate casing 2, which is filled with thermal insulating material during construction, allows the installation of both casings with normal tolerances for deviations from the design geometrical shape established by the valid SNP . The holes 11 in the intermediate casing 2 are filled with several large sizes than the ipyGbi 15 cold plates 3 nl passed through these openings 3 nln other equipment elements (not shown) therefore, their mounting methods do not differ from the known methods and do not cause any difficulties . A sharp decrease in the total number of holes in due to the exclusion of traditional fixing bolts (3–4 CK. Influences on cool cooling) and reduction of the sidewall 14 to one place significantly reduces the laboriousness of manufacturing, manufacturing and installation and practically allows to realize the idea of a blast furnace two covers. Failure of d1 fixing bolts is compensated for by installation (well fps 13 in the grooves 12 of the cold plates 3. Fixator 13 unite the cold plates with each other in closed rings, vfo eliminates the possibility of the cold plates P {I1 accidental destruction of the weld seams} 7 and 18 nli protective pipe 1 jouKke mi of several halves of the fossil plates temporarily. Ptoi “Kpbi4 HKcatop“ i 13 is smaller (n 5-W mm) sizes of paeos 12. This makes it difficult for them to get 1 m and free from that temperature | each refrigerating lit 3. I install 3 slabs with a practical enclosure to the intermediate casing 2. The gap 7 is constructively harmster defined by normal tolerances for deviations from the correct geometry | 1desk (L forwards the installation of the intermediate casing 2 and the cooling plates 3. Irmfrost the gap .8 between refrigeration With Mtami 3 chuguyuy putty intermediate casing 2 serves as a natural lining, ozhumu have the opportunity to gap 8 to fill completely and as a single. In this case, the guindy of putty in the interval between the cots (SLA 5) is practically excluded, since the near-gap gaps 1B and 9 are unequal at different levels and, therefore, for a good filling (without voids) with the 5-ht layer of the interference. The injection of the solution is carried out under pressure, and therefore the solution also part of the filter into the gap 7 through the holes in the gaps 9 of the intermediate casing 2. This design allows, even in the process of stressing, to ensure the gas density of the multilayer wall of the domain loop and ensure real preconditioning for its application lines. . The nature and conditions of operation of the blast furnace casings of the applied structure differs significantly from the operation of traditional blast furnaces with one casing. Intermediate casing 2, divided by height into hormone parts that are not interconnected, cannot take the load (both in the meridional and ring (directions) from the gigantic pressure of the internal gaseous medium: This load is almost completely transmitted to the outside tightly-welded jacket 1, since the remaining elements of the multilayer furnace walls also m can be energized due to their gas permeability. Operational loads in the annular direction from temperature growth of the lining 4 and refrigerated plnt 3, p a (The material of charge materials and the static pressure of the iron (not shown) are perceived by both housings, and the load of each load of each of the housings "southeast is adjusted (at design) by appropriate selection of their thickness, the thickness of layers 5 and 6 taking into account the actual deformation properties materials that are filled with them and the difference in the temperatures of the heating of the casing. The meridional effects of the above loads are perceived, naturally, only by the external casing 1, since the intermediate casing 2 dismemberment and horizontal sections, between which compensation pads 10 are installed, to compensate for vertical displacements of these sections. Despite the fact that casing 1 is suitable for all meridional effects as well as in furnaces with one ccd, it can be made thin, because the casing thickness of housemaid pmi almost by. its entire height is determined by the magnitude of the ring stresses. Taking into account this feature, the TsntsGrabatana structure with two covers, which is more reliable in accordance with the following considerations :. reducing the thickness of each iQ of the covers allows you to more fully use the strength and plastic properties of the stele; due to the soft surface a1 of the inner casing (the single stretching of the rings), the probability of the formation of brittle cracks in it is removed; the greater deformability of the enclosures provides for better sustainability of the multi-SPY wall to men- tional effects; at the expense of increasing the gas-freeness of the multilayer wall of the furnace, with the likelihood of TiosP overheating due to the penetration of hot gases to the casings in the initial stage and operation; protection against corrosion caused by

the effect of internal aggressive condensates, since the intermediate casing, being a screen, significantly reduces the removal of aggressive substances to the outer casing, and the intermediate casing has less opportunities for the formation of condensate due to the fact that its temperature is higher than 30-SOC (approximately equal to the surface temperature Prnmykayuishh refrigeration plates); due to a significant decrease in the total volume of welding (overall dimensions of thin sheets. can be increased), the level of residual welding stresses and their effect on the overall strength and reliability of housings decrease, it is easier for thin sheets to ensure the required quality of welded joints, as in construction, Tak and current repairs.

The most appropriate intermediate casing 2 to install in the cooled part of the shihA-A

You are in the furnace to the tuyere zone, but there are no principal limitations or contraindications for arranging the intermediate casing over the entire height of the furnace.

Large-sized blast furnace cooling plates usually have horizontal ridges (not shown) to install the lining. The design is applicable also in this case, only horizontal protrusions should be arranged in the central or lower parts of the hollow plates.

The proposed construction of a blast furnace with two housings can be most effectively used in the construction of large furnaces with a water system of refrigerated cooling plates. The economic effect is achieved by increasing the operational reliability of the furnace, significantly reducing the costs of repairs and the product losses associated with repairs.

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Claims (1)

A DOMAIN FURNACE, containing a cow ι a chimney, attached to it - refrigerating plates with clamps and equipment elements, a lining, heat-insulating and compensating gaskets, characterized in that, in order to increase the strength and reliability of the design of the furnace shaft, between the casing and the refrigerating plates it is installed with by a gap relative to them, an intermediate casing made of annular sections with openings for free passage of elements of refrigerating plates and equipment, and compensation gaskets are installed between the annular sections, When this holodalnymi gaps between the plates and the intermediate casing are arranged offset