CN108034789B

CN108034789B - Filling and plugging equipment for steel tapping hole of trough type electric arc furnace

Info

Publication number: CN108034789B
Application number: CN201711490667.4A
Authority: CN
Inventors: 王培明; 李小英
Original assignee: Sinosteel Xingtai Machinery and Mill Roll Co Ltd
Current assignee: Sinosteel Xingtai Machinery and Mill Roll Co Ltd
Priority date: 2017-12-30
Filing date: 2017-12-30
Publication date: 2021-05-14
Anticipated expiration: 2037-12-30
Also published as: CN108034789A

Abstract

The invention discloses a plugging device for a steel tapping hole of a trough type electric arc furnace, which relates to the field of electric arc furnace steel-making equipment and comprises a rotating bracket, wherein a storage bin for plugging the steel tapping hole is hinged to the end part of the rotating bracket, the storage bin comprises a shell, a mud outlet is formed in the front end of the shell, and a hydraulic push rod is arranged at the rear end of the shell. The invention realizes the remote operation of steel tapping hole plugging, reduces the labor intensity and has safer operation.

Description

Filling and plugging equipment for steel tapping hole of trough type electric arc furnace

Technical Field

The invention relates to the field of electric arc furnace steel-making equipment, which is used for plugging a steel tapping hole of an electric arc furnace.

Background

The electric arc furnace has the advantages of high temperature, easy control, capability of manufacturing reducing atmosphere, simple smelting equipment and the like, and is widely applied to steelmaking. At present, electric arc furnace steel making mainly adopts two forms of slotted steel tapping and eccentric bottom steel tapping. The trough-type tapping electric arc furnace uses a traditional electric arc furnace, so that smelted molten steel flows into a ladle through a tapping trough, and the trough-type tapping electric arc furnace is widely applied to casting, metallurgy and machinery industries.

When the steel tapping hole is plugged, firstly, pouring a lime block (CaO) into the steel tapping hole, and then poking the lime block into the steel tapping hole; then, magnesia sand of 3-8mm is used for filling and blocking a steel outlet channel, a mixture of magnesia sand, clay and brine is used for sealing and covering the channel, the mixture is solidified and hardened after being heated, the strength is increased, molten steel is prevented from flowing out, and the thickness of the sealing and covering is controlled to be about 50 mm; after the smelted molten steel meets the technological requirements, an operator opens the steel tapping hole by using tools such as a shovel, a steel chisel and the like, and the molten steel flows into the steel ladle through the steel tapping groove.

The steel tapping hole is plugged and opened by manual operation for a long time, the problems of overhigh temperature of the operation environment, overlarge radiation, serious dust pollution, high labor intensity, long operation time and the like exist, and meanwhile, due to the difference of personnel operation, if the steel tapping hole is not plugged firmly, the steel running accident is easily caused.

Disclosure of Invention

The invention aims to provide the plugging equipment for the steel tapping hole of the trough-type electric arc furnace, which realizes the plugging of the steel tapping hole by remote operation, reduces the labor intensity and ensures safer operation.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a stifled equipment of filling of slot type electric arc furnace steel-tapping hole, includes the runing rest, the runing rest tip articulates there is the feed bin of the stemming that the stifled steel-tapping hole was used, the feed bin includes the shell, and the shell front end is provided with out the mud mouth, and the inside hydraulic push rod that is provided with of rear end.

The technical scheme of the invention is further improved as follows: the rotary support comprises an upright post, a cross rod is fixed at the upper end of the upright post (3), the end part of the cross rod is hinged with a cross beam, a swing oil cylinder for driving the cross beam to swing is hinged between the cross rod and the cross beam, the end part of the cross beam is hinged with a vertical hinged shaft, a short rod is fixed at the upper end of the hinged shaft, a stock bin is fixed at the lower end of the hinged shaft, the end part of the short rod is hinged with a fixed length, and the other end of the fixed length.

The technical scheme of the invention is further improved as follows: the fixed length comprises a long fixed length and a short fixed length which are hinged with each other, the other end of the short fixed length is hinged with the cross rod, and the long fixed length is hinged with the short rod.

The technical scheme of the invention is further improved as follows: the mud outlet of the storage bin is conical, and the taper is 15 degrees.

The technical scheme of the invention is further improved as follows: the diameter of the mud outlet of the storage bin is smaller than that of the steel outlet.

The technical scheme of the invention is further improved as follows: the stemming is prepared from 15% of clay powder, 10% of high-aluminum fine powder, 20% of chromium oxide, 20% of silicon dioxide, 15% of corundum powder, 5% of silicon carbide and 15% of coal tar.

Due to the adoption of the technical scheme, the invention has the technical progress that:

the invention realizes the remote steel tapping hole plugging operation, accurately plugs the stemming at the position of the steel tapping hole, shortens the plugging time, reduces the labor intensity and avoids the occurrence of steel leakage accidents; the rotary bracket moves the bin from far to steel mouth position, to improve the work efficiency; the conical mud outlet is convenient for accurately aligning the mud outlet with the steel outlet, so that the plugging efficiency is improved; the high-quality stemming ensures the reliability of steel port plugging.

Drawings

FIG. 1 is a schematic view of the apparatus of the present invention;

FIG. 2 is a schematic view showing an assembly structure of a hinge shaft, a bin, a lift cylinder and a stub bar;

the device comprises a storage bin 1, a storage bin 2, a lifting oil cylinder 3, a stand column 4, a cross rod 5, a cross beam 6, a swing oil cylinder 7, a hinge shaft 8, a short rod 9, a long fixed length 10 and a short fixed length.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

the utility model provides a stifled equipment of filling of slot type electric arc furnace steel-tapping hole, includes the runing rest, the runing rest tip articulates there is feed bin 1, is provided with the stemming that the stifled steel-tapping hole was used in the feed bin 1, and the feed bin includes the shell, and the shell front end is provided with out the mud mouth, and the rear end is provided with hydraulic push rod. The invention realizes the remote steel tapping hole plugging operation, accurately plugs the stemming at the position of the steel tapping hole, shortens the plugging time, reduces the labor intensity and avoids the occurrence of steel leakage accidents.

The runing rest includes stand 3, and 3 upper ends of stand are fixed with horizontal pole 4, and 4 one ends of horizontal pole are fixed with 3 tops of stand, and 4 other ends of horizontal pole articulate there is crossbeam 5, and it has 5 wobbling swing hydro-cylinders 6 to articulate between 4 middle parts of horizontal pole and the 5 middle parts of crossbeam, and 5 tip articulations of crossbeam have vertical articulated

shaft

7, and 7 upper ends of articulated shaft are fixed with quarter butt 8, and 1 middle part of feed bin is connected at 7 lower extremes of articulated shaft and can be along with 7 synchronous rotations of articulated shaft. 8 tip on the quarter butt is provided with the scale, and the scale is including mutual articulated long scale 9 and short scale 10, and the short scale 10 other end is articulated with horizontal pole 4, and long scale 9 is articulated with quarter butt 8.

The preferable shape of the mud outlet of the storage bin 1 is conical, and the taper is 15 degrees. And the diameter of the mud outlet is smaller than that of the steel outlet.

Preferably, the lower end of the hinge shaft 7 can be hinged with a rotating shaft in a vertical manner, as shown in fig. 2, the rotating shaft can rotate around the center of the rotating shaft, two ends of the rotating shaft are fixedly connected with the storage bin 1, the rear end of the storage bin 1 and the short rod 8 are connected with an inclined lifting oil cylinder 2, and the telescopic lifting oil cylinder 2 can adjust the vertical fine adjustment of a mud outlet of the storage bin.

The stemming is prepared from 15% of clay powder, 10% of high-aluminum fine powder, 20% of chromium oxide, 20% of silicon dioxide, 15% of corundum powder, 5% of silicon carbide and 15% of coal tar.

The specific plugging method comprises the following steps:

(1) preparing anhydrous stemming;

(2) cleaning field personnel, and leaving no other personnel outside operators and observers on the field from the aspect of safety;

(3) selecting proper anhydrous stemming, filling the anhydrous stemming into a stemming bin, wherein the specific amount of the anhydrous stemming is determined by the volume of a steel outlet and the type of molten steel

(4) The plane of the furnace wall where the cross rod and the electric arc furnace steel tapping hole are located is adjusted to be in a vertical state, then the swing oil cylinder 6 is driven to extend to enable the short fixed length and the long fixed length to be in a superposed state, the swing oil cylinder 6 continues to extend until the storage bin 1 is vertical to the cross beam 5, and meanwhile, the cross beam 5 is vertical to the cross rod 4;

(5) adjusting the lifting oil cylinder 2 to align the mud outlet of the storage bin with the steel outlet;

(6) and adjusting the hydraulic push rod to push out the anhydrous stemming from the stemming outlet.

Claims

1. The utility model provides a stifled equipment of stifled of slot type electric arc furnace tapping hole which characterized in that: the device comprises a rotary support, wherein a storage bin (1) for filling stemming for a steel tapping hole is hinged to the end part of the rotary support, the storage bin (1) comprises a shell, a mud discharging hole is formed in the front end of the shell, and a hydraulic push rod is arranged in the rear end of the shell; the rotary support comprises an upright post (3), a cross rod (4) is fixed at the upper end of the upright post (3), a cross beam (5) is hinged to the end part of the cross rod (4), a swing oil cylinder (6) for driving the cross beam (5) to swing is hinged between the cross rod (4) and the cross beam (5), a vertical hinged shaft (7) is hinged to the end part of the cross beam (5), a short rod (8) is fixed at the upper end of the hinged shaft (7), a storage bin (1) is fixed at the lower end of the hinged shaft (7), a fixed length is hinged to the end part of the short rod (8), and the other end of the fixed length is hinged; the fixed length comprises a long fixed length (9) and a short fixed length (10) which are hinged with each other, the other end of the short fixed length (10) is hinged with the cross rod (4), and the long fixed length (9) is hinged with the short rod (8); the lower end of the articulated shaft (7) is vertically articulated with a rotating shaft around the center of the rotating shaft, the two ends of the rotating shaft are fixedly connected with the storage bin (1), the rear end of the storage bin (1) and the short rod (8) are connected with an inclined lifting oil cylinder (2), and the telescopic adjustment of the lifting oil cylinder (2) is used for finely adjusting the sludge outlet of the storage bin up and down; the mud outlet of the storage bin (1) is conical in shape, and the taper is 15 degrees; the diameter of a mud outlet of the storage bin (1) is smaller than that of a steel outlet; the stemming is prepared from 15% of clay powder, 10% of high-aluminum fine powder, 20% of chromium oxide, 20% of silicon dioxide, 15% of corundum powder, 5% of silicon carbide and 15% of coal tar.