CN213841749U

CN213841749U - Submerged arc furnace equipment with contactor and belt type pressure ring

Info

Publication number: CN213841749U
Application number: CN202022252263.5U
Authority: CN
Inventors: 李宗翰; 邸俊明; 李佳; 王志虎; 韩照日格图; 牛强; 周鹏飞
Original assignee: Ordos Xijin Mining And Metallurgy Co ltd; Inner Mongolia Erdos Electric Power Metallurgy Group Co Ltd
Current assignee: Ordos Xijin Mining And Metallurgy Co ltd; Inner Mongolia Erdos Electric Power Metallurgy Group Co Ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-07-30
Anticipated expiration: 2030-10-10

Abstract

The utility model belongs to hot stove field in the ore deposit especially relates to a hot stove equipment in ore deposit with contactor and belt pressure ring. The device comprises an electrode shell, a bottom ring, a contactor and a belt type pressure ring; the electrode shell is cylindrical, and the outer side surface of the electrode shell is contacted with the inner side surface of the contactor; the contactors are provided with a plurality of groups and are uniformly distributed on the outer side surface of the electrode shell, and the bottom ends of the contactors are in contact with one side of the bottom ring; the belt-type pressure ring is tightly attached to the two grooves on the contactor; the two grooves for the belt-type pressure rings to cling to are formed in the back of the plurality of groups of contactors; two belt type tightening devices are additionally arranged on the back of the contactor; two holes are formed in the contactor in the radial direction, and a disc spring is placed in the holes; the inner side surface of the bottom ring is in contact with the outer side surface of the electrode shell. The utility model discloses changed the structure of contactor, solved the contactor of electric stove operation in-process and the bias current that the contact of electrode shell well caused beat the muscle piece accident, improved the stability of electric stove operation.

Description

Submerged arc furnace equipment with contactor and belt type pressure ring

Technical Field

The utility model belongs to hot stove field in the ore deposit especially relates to a hot stove equipment in ore deposit with contactor and belt pressure ring.

Background

The submerged arc furnace is a system device for ferrosilicon smelting, and the combined holder is a core device of the system. A typical furnace for an electric furnace has a diameter of about 10 meters and is filled with feedstock. Three electrodes inserted into the raw materials provide electric energy for the furnace, three-phase current heats part of the raw materials to 2000 ℃ through furnace burden, and silicon dioxide is reduced into liquid silicon at high temperature. And liquid metal silicon is discharged from a furnace outlet of the furnace bottom to a silicon ladle, and the molten iron is cast by the ladle finally. The gas obtained by reaction in the furnace is combusted at the charge level, and the generated heat energy is basically the same as the heat energy generated by the electric energy entering the furnace. The part of heat energy can be recycled by a waste heat recovery device or can be used for waste heat power generation. The purified gas still has some impurities, and most of the impurities are gas. The dust purified by dust removal is more than silicon powder.

The combined holder electrode mainly comprises an upper electrode jacket, a lower electrode jacket, an electrode shell, a conductive element, a bottom ring, a protection screen, a feed pipe, an electrode cold and hot air device, an electrode water path, an electrode pressing device, an accident clamping device, a lifting vertical cylinder and the like. The end face of the upper electrode jacket is provided with an electrode pressing device and an accident clamp, and the side face is provided with an electrode cold and hot air device. The lower electrode is sleeved with a fixed electrode waterway, a feed pipe, a lower hanging contact element, a bottom ring, a stainless steel shield and the like.

The electric conduction principle of the motor shell of the combined holder is that the core part is conductive, and the electrode is roasted from the core part to the surface of the electrode shell through resistance heat. The current is transmitted to the electric furnace from the secondary outlet end of the transformer through the short net, the feeding tube, the conductive element and the electrode. The electrode conductive elements of the combined holder are a group of conductive elements, are pre-compressed by 16 groups of belleville springs to generate certain clamping force to tightly clamp the rib plates of the electrode shell, and the electrode shell is not ignited in normal production.

However, due to the structural limitation of the contactor, in addition to pursuing the yield on site, the secondary current on site exceeds the rated current, so that the contactor on the combined type holder brings certain hidden trouble, the current is too large, the cross section of the contactor is possibly over-current to damage the contactor, and the rib striking accident is caused. The inside water structure is because the heat dissipation is not in time, but inside gasification leads to contactor internal pressure too high, makes the emergence of certain weak link of welding condition such as crack appear. The conditions influence the normal operation of the furnace platform if the conditions are small, and the conditions of electric furnace operation shutdown, serious equipment accidents and submerged arc furnace shutdown can occur if the conditions are large.

FIG. 1 is a flow chart of an electric process for smelting a submerged arc furnace, which describes low-voltage side power supply, wherein power supply from a transformer substation is output through a low-voltage end of a transformer 1, passes through a compensator 2, then passes through a water-cooled cable 3, passes through a vertical copper pipe 4 fixed on an electrode, and reaches a contactor 5, and the contactor 5 discharges to the bottom of the submerged arc furnace through an electrode shell 7 to form an electric arc, so that raw materials of the submerged arc furnace are subjected to thermochemical reaction.

Fig. 2 is a simple diagram of an original contactor, the outer side of an electrode shell 7 is in fit contact with the arc surface on the inner side of a contactor 5, and it is understood from fig. 1 that the structure has no belt-type pressure ring 9, so that the contact surface cannot be in close contact, and the phenomenon of bias current is caused.

Patent document CN204007161U discloses a submerged arc furnace electrode holder, including seven or more than seven annular copper pipes, the inlet and outlet of the annular copper pipe are installed together through the busbar, each annular copper pipe on be connected with two sets of perpendicular copper pipes, there are two per set of perpendicular copper pipes, for left perpendicular copper pipe and right perpendicular copper pipe, be provided with the connection piece on the annular copper pipe between left perpendicular copper pipe and right perpendicular copper pipe, the connection piece separate annular copper pipe, right perpendicular copper pipe lower extreme is together fixed with right contact element through right connecting block, left perpendicular copper pipe lower extreme is together fixed with left contact element through left connecting block, be provided with water inlet channel and water outlet channel on right connecting block and the left connecting block respectively, right contact element and left contact element on be provided with water inlet, delivery port and U type water course respectively.

Patent document CN203219539U discloses a conducting system of a combined holder of a submerged arc furnace, which comprises an even number of groups of conducting copper pipes and two busbars, wherein each busbar is electrically connected with half of the number of conducting copper pipes.

The above patent documents all relate to a holder combined with a submerged arc furnace, which can uniformly distribute current, but still have the problems of small contact strength between an electrode shell and a contactor, poor contact and the like, and cause phenomena such as bias current and the like.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a solve the hot stove equipment in ore deposit of above-mentioned problem with contactor and belt pressure ring.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

the submerged arc furnace equipment with the contactor and the belt type pressure ring comprises an electrode shell, a bottom ring, the contactor and the belt type pressure ring; the electrode shell is cylindrical, and the outer side surface of the electrode shell is contacted with the inner side surface of the contactor; the contactor is provided with a plurality of groups which are uniformly distributed on the outer side surface of the electrode shell, and the bottom end of the contactor is in contact with one side of the bottom ring and is in a vertical state; the belt-type pressure ring is tightly attached to two grooves on the contactor.

Furthermore, two holes are formed in the contactor in the radial direction, and a disc spring is placed in the holes.

Furthermore, two belt type tightening devices are additionally arranged on the contactor.

Furthermore, two grooves for tightly attaching the belt-type pressure rings are formed in the back of the plurality of groups of contactors, and have a limiting effect.

Further, the belt type pressure ring is transversely fixed in a groove at the back of the contactor in the vertical direction through a belt type clamping device, and the contactor is contacted.

Further, the bottom ring is positioned at the lower position of the equipment.

Furthermore, the inner side surface of the bottom ring is in contact with the outer side surface of the electrode shell, and the electrode shell is perpendicular to the bottom ring.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) the utility model changes the structure of the contactor, solves the problem of rib hitting accidents caused by poor contact between the contactor and the electrode shell in the operation process of the electric furnace, and improves the operation stability of the electric furnace;

(2) the novel contactor changes the contact strength of the original contactor and the electrode shell, has simple structure and convenient operation, and can solve the bias current problem caused by poor contact between the contactor and the electrode shell in the prior silicon iron and industrial silicon industries;

(3) the novel contactor hooping structure of the novel combined type holder improves the strength of a contact surface, reduces the occurrence of a bias current phenomenon, improves the safety degree of equipment operation, and reduces the occurrence of safety accidents.

Drawings

FIG. 1 is a flow chart of an electric process for smelting in a submerged arc furnace;

FIG. 2 is a simplified diagram of the original contactor;

FIG. 3 is a simplified diagram of the novel apparatus of the present invention;

FIG. 4 is a schematic view of a belted pressure ring and contactor combination of the present invention;

the reference numbers are as follows: 1. a transformer; 2. a compensator; 3. a water-cooled cable; 4. erecting a copper pipe; 5. a contactor; 6. a bottom ring; 7. an electrode case; 8. contactor arc (similar to copper tile); 9. a belt-type pressure ring.

Detailed Description

In order to make the objects and technical solutions of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the following embodiments.

Examples

Fig. 3 is a simplified diagram of the novel device of the present invention, which includes an electrode shell 7, a bottom ring 6, a contactor 5 and a belt-type pressure ring 9; the electrode shell 7 is cylindrical, and the outer side surface of the electrode shell 7 is in contact with the inner side surface of the contactor 5; the contactors 5 are provided with a plurality of groups and are uniformly distributed on the outer side surface of the electrode shell 7, and the bottom ends of the contactors 5 are in contact with one side of the bottom ring 6 and are in a vertical state; the band-type pressure ring 9 is tightly attached to two grooves on the contactor 5.

Two holes are formed in the contactor 5 in the radial direction, and disc springs are placed in the holes. Two belt type tightening devices are additionally arranged on the contactor 5. Two grooves for clinging the belt type pressure ring 9 are arranged on the back of the plurality of groups of contactors 5. The belt-type pressure ring 9 is transversely fixed in a groove at the back of the contactor 5 in the vertical direction through a belt-type tightening device and is in contact with a certain number of contactors 5. The bottom ring 6 is shaped and positioned at the lower part of the equipment. The inner side surface of the bottom ring 6 is in contact with the outer side surface of the electrode shell, and the electrode shell 7 is perpendicular to the bottom ring 6.

This equipment has reduced the emergence of bias current phenomenon through the contact strength in the outside of the inboard cambered surface of increase contactor and electrode shell, on this basis, has increased the belt pressure ring again, and the squeezing action through the belt pressure ring makes the contact of contactor and electrode shell inseparabler, and it is more obvious to reduce the bias current effect.

The utility model discloses can replace the bias current problem that contactor and electrode shell contact failure caused in solving present ferrosilicon and industrial silicon trade, reduce the fault rate and the running cost of electric stove moreover, improve the stability of electric stove operation, finally brought economic benefits.

The above description is only for the embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which all fall within the scope of the present invention.

Claims

1. a submerged arc furnace equipment with contactor and belt pressure ring, is characterized in that, comprises electrode shell, bottom ring, contactor and belt pressure ring;

The electrode shell is cylindrical, and the outer surface of the electrode shell is in contact with the inner surface of the contactor;

There are multiple groups of the contactors, which are evenly distributed on the outer side of the electrode shell, and the bottom end of the contactor is in contact with one side of the bottom ring and is in a vertical state;

The belt pressure ring is in close contact with the two grooves on the contactor.

2 . The submerged arc furnace equipment with a contactor and a belt pressure ring according to claim 1 , wherein two holes are radially opened on the contactor, and a disc spring is placed in the holes. 3 .

3 . The submerged arc furnace equipment with a contactor and a belt pressure ring according to claim 2 , wherein two belt clamping devices are added to the contactor. 4 .

4. a kind of submerged arc furnace equipment with a contactor and a belt pressure ring according to claim 3, is characterized in that, the two grooves that the described belt pressure ring is in close contact with are arranged in the multiple groups of contactors The back acts as a limiter.

5. A submerged arc furnace equipment with a contactor and a belt pressure ring according to claim 4, characterized in that, the belt pressure ring is laterally fixed in contact with a vertical direction by a belt clamp device Contact the contactor in the slot on the back of the device.

6 . The submerged arc furnace equipment with a contactor and a belt pressure ring according to claim 1 , wherein the bottom ring is located at a lower position of the equipment. 7 .

7. A submerged arc furnace equipment with a contactor and a belt pressure ring according to claim 6, wherein the inner side of the bottom ring is in contact with the outer side of the electrode shell, and the electrode shell perpendicular to the bottom ring.