SU1375651A1 - Blast furnace lining - Google Patents

Abstract

This invention relates to ferrous metallurgy, in particular to blast furnace lining devices. The aim of the invention is to increase the durability of the masonry and increase its service life. After mounting the casing 1, bottom 2, coolers 3, blocks 4, 5, blocks 6 of the first masonry ring are mounted so that the face faces of the blocks are chords of the outer and inner circles of the masonry ring, and the axial lines of the blocks are tangent to a circle with a radius of 0.4 -0.5 radius of the outer circumference of the ring. At the same time, the blocks in adjacent rings are raveguty in opposite directions relative to the vertical axis of the furnace. In addition, the ratio of the length of the blocks to the width of the outer end face is not less than 2. 7 Il.

Description

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137565

This invention relates to ferrous metallurgy, in particular to blast furnace lining devices.

The aim of the invention is to increase the durability and rigidity of the masonry and to reduce its service life.

Figure 1 shows a horn domain furnace with blocks stacked in plan in one ring, a vertical section; .a figure 2 sections aa and bb in figure 1; on FIG. 3 - horn of a blast furnace. with blocks laid. in two rings, a vertical section; figure 4 - sections bb and GGD fig.Z; fig.Z - node I in figure 2; Fig. 6 is a schematic diagram of the construction of a block shape, a plan view; Fig. 7 is a schematic diagram of the manufacture of the block.

In Figures 1-7, the following symbols are accepted: blocks,. a, laid in plan in one ring with the tangential direction of the axes of the blocks with rotation relative to the center of the furnace in one direction; blocks b, laid in plan in one ring with around the axis of the axes of blocks in the opposite direction relative to the center of the furnace and blocks c, d, 3, e, laid in two rings in plan with the rotation of the axes of adjacent rings in opposite directions relative to the center of the furnace, radius R outer ring of blocks; radius RT; inner ring of blocks; radius r of a circle, relative to which the axial lines of the blocks are directed tangent

socially, i.e. are tangent lines; width n wide end of the block; width n, narrow end of the block; width of 1 ring of blocks; n-j block length along its axis; acute angles to and from / between the axis of the block and, respectively, wide and narrow widths of the block; as well as intermediate values ofj, n, n ..

The blast furnace contains casing 1, bottom 2, plate refrigerators 3, graphitized vertical blocks 4, peripheral blocks with parallel faces in plan 5, carbon blocks conical in plan 6, laid in a plan in one ring with axes directed tangentially ( are displaced relative to the center of the furnace), as well as high-refractory mullite products 7 in the central part of the floor, compensation packing 8 of carbon mass in the annular vertical gaps between refractory products, refrigerators and casing, carbon blocks 9 in section onah iron notches and

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fire-resistant chamotte products 10 and 1 in the area of cast-iron tap-holes and in the hearth.

It is also possible to construct a blast furnace with laying carbon conical blocks 1 2 in a two-ring plan with a tangential direction of the axes of the blocks (offset from the center of the furnace).

The lining is performed as follows.

After mounting the casing 1, the bottom 2 and the plate coolers 3, the graphitized vertical 4 and the peripheral 5 blocks, the blocks 6 of the first ring are mounted so that the end faces of the blocks are chords of the outer radius R and the inner radius R, the circumferences of the ring, and the axial lines of the blocks directed tangentially, i.e. are tangent lines to a circle, the radius g of which is 0.4-0.5 of the radius R of the local circle of the ring.

Practically, the blocks are set by the calculated angle c (displacement of the axes of the blocks relative to the center of the furnace, which is derived from the ratio r / R, specified in the range 0.4-0.5. So, for example, at r / R 0.45,

ol arcsih - arcsin 0,45 26 ° 45. to

Consistently assemble the blocks with. Observance of the regulatory seam between them. In this case, the blocks a and 6 adjacent rings are turned in opposite directions relative to the center of the furnace.

As the blocks 6 are mounted, the high-refractory mullite products 7 are placed in the central part of the bottom, and the gaps between the refractory products 7, blocks 6 and plate refrigerators 3 are hammered with a compensation gasket 8 (carbonaceous mass).

Simultaneously with the installation of blocks 6 of the hearth, carbon blocks 9 and fire-resistant chamotte products 10 are laid out in the areas of cast-iron entrance plates. Upon completion of the installation of the blocks 6 hearth complete the hearth lining with refractory fireclay products 11. I

With the construction of a blast furnace with

By arranging the carbon conical blocks of the bottom and hearth in two rings in the plan (Fig. 3 and 4) the blocks in each ring are arranged in the order described, the sequence of mounting the rings is determined by technology. At the same time, in adjacent rings, vertically and horizontally, the blocks are turned in opposite directions relative to the center of the furnace.

This blast furnace lining design will reduce the concentration of stresses in the casing and increase the durability of the lining of the bottom and hearth, which is achieved by the tangential direction of the axes of the blocks (offset from the center of the furnace), at which the loads on the casing and on the corresponding blocks in the ring are distributed more evenly; each block is in contact with 10-12 adjacent blocks, which increases the rigidity of the whole masonry array, the length of the vertical joints between blocks increases by 12-15% with the same width of 1 block of blocks and, moreover, , the vertical gavas between the blocks are compacted due to pressure from inside the furnace, which prevents liquid iron from penetrating into the willows between the blocks and prevents the gavas from opening on the peripheral part of the

ca.

Thus, the invention will improve the durability of the lining and

housing in the most dangerous area - in the bottom and horn and extend the campaign

blast furnace.

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The lining design can also be applied in other industrial furnaces, in which the lining is made of large-sized elements in the form of a ring.

Claims (1)

Invention Formula The lining of the blast furnace, including a compensatory gasket, ring hornstone and bottom of refractory wedge blocks, the end faces of which have the form of chords of the outer and inner circumferences of the masonry rings, which are designed to increase the durability of the masonry and increase its service life in the masonry rings so that their axial lines are tangent to the circle F with a radius of 0.4-0.5 and the radius of the outer circumference of the masonry ring, and the ratio of the length of the blocks to the iirin of the outer face is at least 2, th blocks in adjacent rings masonry deployed in opposite directions relative to the vertical axis of the furnace. .A-a 6-5 one i 1Z in 5 P3 R &-AT 12 one  fHH oi FIG. five Nontur SQ omoS- none b / roHu Phi2.1