CN212051494U - Blast furnace with thin lining combined with plate wall - Google Patents

Abstract

The blast furnace with plate-wall combined thin lining consists of blast furnace foundation, smooth cooling wall of grey cast iron, smooth tuyere cooling wall, embedded bricks, cooling plate, double-layer water-cooled nodular cast iron cooling wall with embedded bricks, two-section furnace body, reverse L-shaped wear-resisting nodular cast iron cooling wall, reverse C-shaped wear-resisting nodular cast iron cooling wall, water-cooled furnace throat steel brick and furnace top sealing cover. A gray cast iron smooth surface cooling wall is adopted at the hearth part of the blast furnace bottom; the cooling mode that a double-layer water-cooling nodular cast iron cooling wall with embedded bricks is combined with a cooling plate is adopted at the parts with high heat load of the middle lower part of the furnace belly, the furnace waist and the furnace body; the middle part of the furnace body adopts a cooling form that a single-layer water-cooling nodular cast iron cooling wall with inlaid bricks is combined with a cooling plate; an inverted L-shaped and inverted C-shaped plain surface wear-resistant nodular cast iron cooling wall is adopted at the upper part of the furnace body; the furnace throat adopts water-cooling cast steel furnace throat steel bricks. The advantages are that: high yield, long service life, high efficiency, low cost and saving energy.

Description

Blast furnace with thin lining combined with plate wall

The technical field is as follows:

the utility model relates to the technical field of smelting equipment, in particular to a blast furnace body with a plate wall combined with a thin furnace lining cooling mode.

Background art:

at present, the main types of blast furnace bodies classified in a cooling mode are as follows: the high-temperature zone adopts a blast furnace body in the form of a copper cooling wall and a thin furnace lining; a blast furnace body in the form of an all-iron-based cooling wall and a thick furnace lining; a blast furnace body in the form of an all-iron-based cooling wall and a thin furnace lining; the plate wall is combined with a blast furnace body in the form of cooling equipment and thick furnace lining; the high temperature zone adopts a blast furnace body with copper rib all iron base cooling wall and thin furnace lining. The high-temperature zone adopts a copper cooling wall and thin furnace lining form, and the copper cooling wall can withstand the impact of heat flow density of 300 kW/square meter due to the high heat conductivity of copper, so that the high yield, long service life, high efficiency and energy conservation of the blast furnace can be realized. However, as the copper cooling wall is additionally provided with soft water closed circulation, the engineering investment is high, the common large blast furnace is used commonly, and the engineering investment of the medium and small blast furnaces is difficult to bear; the cooling wall is good in lining at the initial stage of production of the blast furnace in the form of an all-iron-based cooling wall plus a thick furnace lining and an all-iron-based cooling wall plus a thin furnace lining, but after several months of production, the lining gradually falls off and disappears due to no support, so that the cooling wall is completely exposed, and the iron-based cooling wall is burnt out quickly due to the fact that the iron-based cooling wall is low in heat flow strength and has serious direct contact with molten iron and erosion, and high yield, long service life and high efficiency of the blast furnace cannot be realized; the plate wall is combined with a cooling device and a thick furnace lining, a replaceable cooling plate is combined with a non-replaceable cooling wall, the non-replaceable cooling wall is protected by the replaceable cooling plate, and meanwhile, the cooling plate can also play a role in supporting refractory materials and easily forming slag crust; the high-temperature area adopts the form of the copper-ribbed all-iron-based cooling wall and the thin furnace lining, the high-temperature area adopts the cooling wall with the copper ribs, and the copper cooling plate and the iron-based cooling wall are ingeniously combined together.

The utility model has the following contents:

the utility model aims to overcome the defects in the prior art and provide a blast furnace which is suitable for various furnace bodies and has the advantages of high yield, long service life, high efficiency, energy conservation and low cost.

The utility model discloses a realize through following technical scheme: the blast furnace with the thin furnace lining combined with the plate wall comprises a blast furnace foundation and a furnace top sealing cover; the method is characterized in that: the furnace also comprises a gray cast iron smooth surface cooling wall, a smooth transition tuyere cooling wall, an embedded brick, a cooling plate, a double-layer water-cooling nodular cast iron cooling wall with an embedded brick, a two-section furnace body, an inverted L-shaped wear-resistant nodular cast iron cooling wall, an inverted C-shaped wear-resistant nodular cast iron cooling wall and a water-cooling furnace throat steel brick; a grey cast iron smooth surface cooling wall is adopted at the hearth and hearth part of the blast furnace foundation; the cooling mode that a double-layer water-cooling nodular cast iron cooling wall with inlaid bricks is combined with a cooling plate is adopted at the part with high heat load at the furnace belly, the furnace waist and the lower part of the furnace body; the middle part of the furnace body adopts a cooling form that a single-layer water-cooling nodular cast iron cooling wall with inlaid bricks is combined with a cooling plate; the upper part of the furnace body adopts the structural forms of an inverted L-shaped wear-resistant nodular cast iron cooling wall and an inverted C-shaped wear-resistant nodular cast iron cooling wall; the furnace throat adopts a form of cast steel water-cooling furnace throat steel bricks; the hearth part of the blast furnace bottom, the furnace belly, the furnace waist, the lower part of the furnace body, the middle part of the furnace body and the upper part of the furnace body are all connected in a masonry mode to form the blast furnace body.

The utility model has the advantages that: the cooling mode of plate-wall combination uses the replaceable cooling plate to protect the non-replaceable cooling wall, thus prolonging the service life of the cooling wall, and meanwhile, the cooling plate can also play the roles of supporting refractory materials and easily forming slag crust, thus achieving the goal of long service life of the blast furnace. The utility model discloses changed in the past little blast furnace shaft upper portion does not have refrigerated structural style, adopted the cooling structure that the siding combines the full coverage, and what furnace shaft upper portion adopted is wear-resisting nodular cast iron stave, has strengthened the wearability of stave to the furnace charge again under the refrigerated circumstances of assurance. The utility model discloses the hot face of whole furnace body stave adopts the smooth transition form, and the position is adopted to link up with shaft upper portion, shaft upper portion and shaft middle part in the furnace hearth, falls L type plain noodles stave, and the wind gap stave adopts smooth transition structural style, makes the stave hot face not have the boss, has alleviateed the washing away of gas stream to the stave, has prolonged the stave life-span. The utility model discloses a two segmentation stack designs, under the performance condition of not influencing blast furnace, can effectively reduce resistant material, stave, stove outer covering weight, reduce the engineering investment. The cooling structure of the cooling wall and the thin furnace lining is combined on the plate wall, so that the service life of the cooling wall is ensured, the use amount of refractory materials is reduced, the designed furnace type is basically consistent with the working furnace type, and the engineering investment can be effectively reduced under the same furnace capacity.

Description of the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an embodiment of the present invention, which is an inverted C-shaped wear-resistant nodular cast iron cooling wall;

fig. 3 is the wear-resisting nodular cast iron stave of type of falling L in the embodiment of the utility model.

In the drawings: 1. a blast furnace foundation; 2. a gray cast iron smooth cooling wall; 3. a tuyere cooling wall with smooth transition; 4. inlaying bricks; 5. a cooling plate; 6. a double-layer water-cooling nodular cast iron cooling wall with embedded bricks; 7. a two-section furnace body; 8. an inverted L-shaped wear-resistant nodular cast iron cooling wall; 9. an inverted C-shaped wear-resistant nodular cast iron cooling wall; 10. water-cooling the furnace throat steel brick; 11. a furnace roof enclosure.

The specific implementation mode is as follows:

the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. As shown in figure 1: a plate-wall combined thin-lining blast furnace comprises a blast furnace foundation 1, a gray cast iron smooth surface cooling wall 2, a smooth transition tuyere cooling wall 3, an embedded brick 4, a cooling plate 5, a double-layer water-cooling nodular cast iron cooling wall 6 with an embedded brick, a two-section furnace body 7, an inverted L-shaped wear-resistant nodular cast iron cooling wall 8, an inverted C-shaped wear-resistant nodular cast iron cooling wall 9, a water-cooling furnace throat steel brick 10 and a furnace top sealing cover 11; a gray cast iron smooth surface cooling wall is adopted at the hearth part of the blast furnace bottom; the cooling mode that a double-layer water-cooling nodular cast iron cooling wall with inlaid bricks is combined with a cooling plate is adopted at the part with high heat load at the furnace belly, the furnace waist and the lower part of the furnace body; the middle part of the furnace body adopts a cooling form that a single-layer water-cooling nodular cast iron cooling wall with inlaid bricks is combined with a cooling plate; as shown in fig. 2 and 3: in fig. 2, the upper part of the furnace body adopts an inverted L-shaped wear-resistant nodular cast iron cooling wall structure, and in fig. 3, the upper part of the furnace body adopts an inverted C-shaped wear-resistant nodular cast iron cooling wall structure; the furnace throat adopts a water-cooling cast steel furnace throat steel brick form. The hearth part of the blast furnace bottom, the furnace belly, the furnace waist, the lower part of the furnace body, the middle part of the furnace body and the upper part of the furnace body are all connected in a masonry mode to form the blast furnace body.

Claims (1)

1. A blast furnace with a plate wall combined with a thin furnace lining comprises a blast furnace foundation (1) and a furnace top sealing cover (11); the method is characterized in that: the furnace also comprises a gray cast iron smooth surface cooling wall (2), a smooth transition tuyere cooling wall (3), an embedded brick (4), a cooling plate (5), a double-layer water-cooling nodular cast iron cooling wall (6) with an embedded brick, a two-section furnace body (7), an inverted L-shaped wear-resistant nodular cast iron cooling wall (8), an inverted C-shaped wear-resistant nodular cast iron cooling wall (9) and a water-cooling furnace throat steel brick (10); a furnace bottom hearth part of a blast furnace foundation (1) adopts a gray cast iron smooth surface cooling wall (2); the cooling mode of combining a double-layer water-cooling nodular cast iron cooling wall (6) with inlaid bricks and a cooling plate (5) is adopted at the positions with high thermal load at the furnace belly, the furnace waist and the lower part of the furnace body; the middle part of the furnace body adopts a cooling form that a single-layer water-cooling nodular cast iron cooling wall with inlaid bricks is combined with a cooling plate; the upper part of the furnace body adopts the structural forms of an inverted L-shaped wear-resistant nodular cast iron cooling wall (8) and an inverted C-shaped wear-resistant nodular cast iron cooling wall (9); the furnace throat adopts a form of cast steel water-cooling furnace throat steel bricks (10); the hearth part of the blast furnace bottom, the furnace belly, the furnace waist, the lower part of the furnace body, the middle part of the furnace body and the upper part of the furnace body are all connected in a masonry mode to form the blast furnace body.

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