CN214991674U

CN214991674U - Blast furnace bell-less top distribution chute

Info

Publication number: CN214991674U
Application number: CN202121559194.0U
Authority: CN
Inventors: 刘铭; 杨行隆
Original assignee: Jiangyin Hongnuo Machinery Equipment Manufacturing Co ltd
Current assignee: Jiangyin Hongnuo Machinery Equipment Manufacturing Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-12-03
Anticipated expiration: 2031-07-09

Abstract

The utility model discloses a blast furnace bell-less furnace top distribution chute, which comprises a chute body, wherein a wear-resistant lining plate is arranged in the chute body and is parallel to the bottom surface of the chute body, a plurality of striker plates are arranged on the wear-resistant lining plate, and the striker plates are inclined towards the front end of the chute body and form an included angle of less than 65 degrees with the bottom surface of the chute body; the striker plate sets up towards the front end slope of cell body, can make the front of striker plate bear the impact of furnace charge whereabouts, the effect of accepting the furnace charge of performance striker plate that can furthest to even wear-resisting welt can continue to exert the effect of accepting the furnace charge after the striker plate wearing and tearing finish, improve the life of distribution chute.

Description

Blast furnace bell-less top distribution chute

Technical Field

The utility model belongs to the technical field of blast furnace ironmaking equipment, in particular to a bell-less furnace top distribution chute of a blast furnace.

Background

The distribution chute is the most important vulnerable part in blast furnace bell-less top charging equipment, is hung at the bottom of a chute transmission gear box and is driven by the chute transmission gear box to rotate and tilt, and iron-making furnace burden is distributed and charged into the furnace in a certain required reasonable mode in classified batches. The material passing amount of a distribution chute of the large blast furnace producing ten thousand tons of molten iron per day reaches more than 2 ten thousand tons, the furnace materials are discharged from a material flow regulating valve arranged at the bottom of a weighing charging bucket to a material distribution chute material dropping point and have a fall of 5-6 m, and the furnace material speed at the material dropping point reaches about 10 m/s. The distribution chute continuously works in the closed space at the upper part of the furnace throat of the blast furnace for a long time, the temperature is high, the temperature change is frequent, the working condition environment is severe, the high-strength impact erosion abrasion is borne, the working load is very large, and the working condition and the damage condition of the distribution chute cannot be observed outside the blast furnace. Therefore, a distribution chute is required which has sufficient reliability and service life. At present, the service life of the domestic blast furnace distribution chute is generally short, namely only 6-8 months, and the service life of the distribution chute can reach 10-12 months. Therefore, the service life of the distribution chute is prolonged, and the method has very important significance for reducing production loss, reducing the damping-down rate of the blast furnace and fully exerting the advantages of the bell-less top of the blast furnace.

As shown in fig. 1, the distribution chute generally adopted in China at present is of a two-section structure, a plurality of material blocking devices are obliquely and vertically arranged at a first blanking point section bearing direct impact of furnace burden, a material cushion formed by storing the furnace burden at intervals by utilizing the material blocking devices resists direct impact erosion abrasion of the furnace burden on a chute lining plate, and the purpose of prolonging the service life of the distribution chute is achieved in the form of material grinding materials; and in the second drop point section, it is usually in the form of a multi-layer flat wear liner. The first blanking point section bears direct impact scouring of furnace burden, so that the abrasion is particularly serious, the service life of the first blanking point section greatly determines the whole service life of the distribution chute, and the second blanking point section is the second.

The dam device of the first blanking point district section of all distribution chutes at present is the slope setting towards distribution chute afterbody direction, the angle is generally 45, the dam device top bears the direct impact erosion and wear of furnace charge, after dam device top carbide sclerosis layer wearing and tearing became invalid, surplus dam device base member and both sides face carbide sclerosis layer bear the ability of direct impact erosion and wear for weakening greatly can accelerated wear became invalid, the bedding course that the dam device was saved constantly reduces the attenuate and loses the material abrasive action, finally lead to the distribution chute to become invalid because of first blanking point position grinds hourglass wearing and tearing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the prior technical defects and provide a blast furnace bell-less furnace top distribution chute which can greatly prolong the whole service life of the distribution chute.

In order to solve the technical problem, the utility model provides a blast furnace does not have bell furnace roof distribution chute, cell body including the distribution chute, be equipped with in the cell body with the bottom surface parallel arrangement's of cell body wear-resisting welt, be equipped with a plurality of striker plates on the wear-resisting welt, the striker plate orientation cell body front end slope set up and with the contained angle of the bottom surface of cell body is less than 65.

Further, the striker plate is located including the slope the backup pad of wear-resisting welt upper end, locate first steel base plate and the build-up welding of backup pad upper end are located the first stereoplasm alloy layer of the upper end of first steel base plate, the backup pad with first steel base plate links together through the cooperation of first bolt and first nut.

Furthermore, a first thermal insulation buffer layer is arranged at the lower end of the first steel substrate.

Further, the wear-resistant lining plate comprises a second steel base plate arranged at the upper end of the groove body, a second hard alloy layer is arranged on the upper end of the second steel base plate in a build-up welding mode, and the groove body and the second steel base plate are connected together through a second bolt and a second nut in a matched mode.

Furthermore, a second heat insulation buffer layer is arranged at the lower end of the second steel substrate.

Further, the included angle between the material baffle plate and the bottom surface of the groove body is 60 degrees.

The utility model discloses following beneficial effect has:

the utility model discloses when the furnace charge falls to the cell body on, the furnace charge at first drops to the striker plate, and because the striker plate sets up towards the front end slope of cell body, can make the front of striker plate bear the impact of furnace charge whereabouts, the effect of accepting the furnace charge of performance striker plate that can furthest to even have the effect that wear-resisting welt can continue to exert and accept the furnace charge after the striker plate wearing and tearing finish, make the life-span of cloth chute can improvement by a relatively large margin.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute a limitation of the invention, and in which:

fig. 1 is a schematic diagram of a distribution chute structure commonly used in China at present.

Fig. 2 is a schematic diagram of a bell-less top distribution chute of a blast furnace in an embodiment.

Fig. 3 is a sectional view of a bell-less top distribution chute of a blast furnace in an embodiment.

Fig. 4 is a schematic view of a wear liner in an embodiment.

Fig. 5 is a schematic view of the striker plate in the embodiment.

Detailed Description

In order to fully understand the technical contents of the present invention, the present invention will be further described and explained with reference to the accompanying drawings and specific embodiments; it should be noted that, if "first" or "second" is described in the text, it is used to distinguish different components, and the like, and does not represent the order of precedence, and does not limit "first" and "second" to be different types.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

As shown in fig. 2-5, the blast furnace bell-less top distribution chute shown in this embodiment includes a chute body 1 of the distribution chute, a wear-resistant lining plate 2 arranged in parallel with the bottom surface of the chute body 1 is arranged in the chute body 1, a plurality of striker plates 3 are arranged on the wear-resistant lining plate 2, and the striker plates 3 are arranged in an inclined manner towards the front end of the chute body 1 and form an included angle of 60 degrees with the bottom surface of the chute body 1; in the structure, because the bottom at chute drive gear box is hung in the slope of cell body 1, when the furnace charge falls to in the cell body 1, the furnace charge at first drops to striker plate 3, and because striker plate 3 sets up towards the front end slope of cell body 1, can make the front of striker plate 3 bear the impact of furnace charge whereabouts, the effect of accepting the furnace charge of performance striker plate 3 that can furthest, and even have wear-resisting welt 2 to continue to exert the effect of accepting the furnace charge after 3 wearing and tearing of striker plate finish, make the life-span of distribution chute can by a relatively large margin improve.

Specifically, the striker plate 3 comprises a support plate 31 obliquely arranged at the upper end of the wear-resistant lining plate 2, a first steel substrate 32 arranged at the upper end of the support plate 31, and a first hard alloy layer 33 arranged at the upper end of the first steel substrate 32 in a surfacing manner, wherein a first thermal insulation buffer layer 34 is arranged at the lower end of the first steel substrate 32, the first thermal insulation buffer layer 34, the first steel substrate 32 and the first hard alloy layer 33 are respectively two layers, and the support plate 31 and the first steel substrate 32 are connected together through the matching of a first bolt 35 and a first nut 36; the service life of the striker plate 3 can be further prolonged by the two first hard alloy layers 33, the two first insulating buffer layers 34 can better isolate heat, and simultaneously play a better buffering role, so that the impact force of furnace burden falling onto the first hard alloy layers 33 is reduced.

Specifically, the wear-resistant lining plate 2 comprises a second steel base plate 21 arranged at the upper end of the tank body 1, a second hard alloy layer 22 is arranged at the upper end of the second steel base plate 21 in a surfacing mode, a second heat-insulating buffer layer 23 is arranged at the lower end of the second steel base plate 21, and the tank body 1 and the second steel base plate 21 are connected together through a second bolt 24 and a second nut 25 in a matching mode; the second thermal insulation buffer layer 23 is used for isolating heat, and the second thermal insulation buffer layer 23 can also play a certain role in buffering, so that impact force when furnace burden falls onto the second hard alloy layer 22 is reduced.

The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a blast furnace bell-less furnace roof distribution chute, includes the cell body of distribution chute, its characterized in that, be equipped with in the cell body with the wear-resisting welt of the bottom surface parallel arrangement of cell body, be equipped with a plurality of striker plates on the wear-resisting welt, the striker plate orientation the slope of cell body front end set up and with the contained angle of the bottom surface of cell body is less than 65.

2. The blast furnace bell-less top distribution chute of claim 1, wherein said striker plate comprises a support plate obliquely disposed at an upper end of said wear-resistant lining plate, a first steel base plate disposed at an upper end of said support plate, and a first hard alloy layer disposed at an upper end of said first steel base plate by build-up welding, said support plate and said first steel base plate being connected together by a first bolt and a first nut in cooperation.

3. The blast furnace bellless top distribution chute of claim 2, wherein said first steel base plate is provided at its lower end with a first thermally insulating buffer layer.

4. The blast furnace bellless furnace top distribution chute of claim 3, wherein said wear-resistant lining plate comprises a second steel base plate disposed at the upper end of said trough body, a second hard alloy layer is deposited on the upper end of said second steel base plate, and said trough body and said second steel base plate are connected together by means of a second bolt and a second nut.

5. The blast furnace bellless top distribution chute of claim 4, wherein said second steel base plate is provided at its lower end with a second thermally insulating buffer layer.

6. The blast furnace bellless top distribution chute of claim 1, wherein the angle between the striker plate and the bottom surface of the chute body is 60 °.