CN114136098A

CN114136098A - High-efficient tin concentrate smelting electric furnace roof device

Info

Publication number: CN114136098A
Application number: CN202111581848.4A
Authority: CN
Inventors: 杨进; 章静波; 章景中
Original assignee: Maanshan Weitai Tin Industry Co ltd
Current assignee: Maanshan Weitai Tin Industry Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-03-04

Abstract

The invention discloses a furnace top device of an electric furnace for smelting tin concentrate with high efficiency, belonging to the technical field of tin concentrate processing. The tin concentrate transferring device comprises a supporting platform, a tin concentrate transferring mechanism and an electrode rod lifting mechanism, wherein the tin concentrate transferring mechanism and the electrode rod lifting mechanism are fixed on the supporting platform; the electrode rod lifting mechanisms are symmetrically and vertically arranged around the furnace top; symmetrically distributed electrode bar inserting openings are also formed in the furnace top surrounding the middle opening; the feed end of the tin concentrate transfer mechanism is transversely fixed on the supporting platform through a bracket of the tin concentrate transfer mechanism, a blanking port at the discharge end of the tin concentrate transfer mechanism is hermetically communicated with the middle opening of the furnace top, and the fixed connection part of the blanking port is sealed through a sealing ring or a sealing gasket; the electrode rod lifting mechanism inserts the electrode rods into the electrode rod insertion holes in the furnace top, the electrode rods are symmetrically arranged on the periphery of the middle opening of the furnace top, and materials can be evenly dropped between the electrode rods when fed through the middle opening, so that the technical effect of evenly heating the materials is achieved.

Description

High-efficient tin concentrate smelting electric furnace roof device

Technical Field

The invention relates to the technical field of tin concentrate processing, in particular to a furnace top device of an efficient tin concentrate smelting electric furnace.

Background

In smelting electric furnaces for producing tin, ferroalloys, silicon, pig iron and the like, consumable electrode rods, typically carbon electrodes, are used which are immersed in the charge material during operation of the smelting electric furnace. The electrode is held by an electrode holder. The working current flows to the electrode clamp and then to the electrode. The electrode is vertically adjusted by a hydraulic cylinder to maintain a predetermined electrode current, or a predetermined resistance value. The electrode clamp system further includes means for sliding the electrode through the electrode clamp to compensate for consumption of the electrode.

This electrode rod that tin concentrate electric furnace was used is top position in smelting the electric furnace, belongs to the consumable article, needs often to change, because electrode rod weight is great, needs to lift by crane in the change process, but ordinary driving lifts by crane the formula installation and hardly aims at the installing port and lead to the installation effectiveness poor, in addition, takes place the interference formula collision easily and causes the loss and the safety risk of electrode rod.

When the existing tin concentrate electric furnace feeds, concentrate is generally conveyed to a feed inlet on the furnace top through a conveyor, for the convenience of feeding, the feed inlet is generally arranged on one side of the furnace top, the technical problem that the concentrate is unevenly fed in the electric furnace after feeding exists, further the temperature rise of the concentrate is unbalanced, and the consumption degree of electrode rods is different.

Disclosure of Invention

1. Technical problem to be solved by the invention

Aiming at the problems of uneven temperature rise of concentrate and uneven smelting caused by uneven feeding of the existing tin concentrate electric furnace, the invention designs the furnace top device of the high-efficiency tin concentrate smelting electric furnace.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a furnace top device of a high-efficiency tin concentrate smelting electric furnace comprises a supporting platform, a tin concentrate transferring mechanism and an electrode bar lifting mechanism, wherein the tin concentrate transferring mechanism and the electrode bar lifting mechanism are fixed on the supporting platform; the electrode bar lifting mechanisms are symmetrically and vertically arranged around the furnace top; symmetrically distributed electrode bar inserting openings are also formed in the furnace top surrounding the middle opening; the feed end of the tin concentrate transfer mechanism is transversely fixed on the supporting platform through a support of the tin concentrate transfer mechanism, and a blanking port at the discharge end of the tin concentrate transfer mechanism is hermetically communicated with the middle opening of the furnace top, namely after the blanking port is communicated with the middle opening, the fixed connection part of the blanking port is sealed through a sealing ring or a sealing gasket; the electrode rod lifting mechanism inserts the electrode rods into the electrode rod insertion holes in the furnace top, the electrode rods are symmetrically arranged on the periphery of the middle opening of the furnace top, and materials can be evenly dropped between the electrode rods when fed through the middle opening, so that the technical effect of balanced temperature rise of the materials is achieved.

The tin concentrate conveying mechanism is generally an auger type conveyor; the number of the electrode rod lifting mechanisms is three, and the finished product is distributed around the furnace top; the electrode rod lifting mechanism comprises a vertical fixing frame, a lifting arm, a winch and a pulley mechanism; the electrode bar lifting mechanism is fixed on the supporting platform through a vertical fixing frame of the electrode bar lifting mechanism, a plurality of tin concentrate lifting mechanisms are not required to be arranged, and one tin concentrate lifting mechanism is connected with one tin concentrate transferring mechanism to achieve the purpose of feeding materials through an opening in the middle of the furnace top; and 3 electrode bar lifting mechanisms are not required to be arranged, and the purpose of balanced heating of the materials can be achieved.

According to a further technical scheme, the vertical fixing frame comprises a vertical support column, a support guide column on the inner side of the support column and a crane boom transversely and fixedly connected to the top ends of the support column and the support guide column; the support column and the support guide column are both fixedly connected to the support platform; one end of the lifting arm is fixedly connected with a guide frame which is sleeved on the support guide post and is in sliding connection with the support guide post, and the other end of the lifting arm is fixedly connected with an electrode bar fixing piece; the pulley mechanism comprises a first fixed pulley, a second fixed pulley, a third fixed pulley and a fourth fixed pulley which are parallel to the third fixed pulley and are sequentially arranged and fixed on the upper surface of the crane boom, and further comprises a first movable pulley which is fixed on the upper surface of the lifting arm, and a first through hole and a second through hole are respectively formed in the crane boom close to the second fixed pulley and the third fixed pulley; the winch is fixed on the outer side of the lower part of the pillar, the free end of a traction rope of the winch sequentially bypasses a first fixed pulley, a fourth fixed pulley, a second through hole which downwards penetrates through a first movable pulley, a second through hole which upwards penetrates through a second fixed pulley, a third fixed pulley and a second fixed pulley and downwards penetrates through a first through hole, the winch is fixedly connected to the guide frame, the winch is fixed on the supporting platform through a stable vertical fixing frame, the guide pillar and the guide frame are matched in a vertical guide type lifting mode, and the lifting arm of the winch is matched with the fixed pulley and the movable pulley in the pulley mechanism, so that the technical effects of accurately aligning the mounting opening to mount the electrode rod and improving the replacement efficiency are achieved.

According to a further technical scheme, the pulley mechanism further comprises a fixed pulley five close to the through hole II and a movable pulley II parallel to the movable pulley I on the upper surface of the lifting arm, and the fixed pulley five and the fixed pulley are arranged on two sides of the through hole II in a trisection manner; the free end of the traction rope sequentially bypasses the first fixed pulley and the fourth fixed pulley, downwards passes through the second through hole, bypasses the first movable pulley, upwards passes through the second through hole, bypasses the fifth fixed pulley, downwards passes through the second through hole, bypasses the second movable pulley, upwards passes through the second through hole, bypasses the third fixed pulley and the second fixed pulley, and downwards passes through the first through hole, and then is fixedly connected to the guide frame.

According to the further technical scheme, the wheel directions of the fixed pulley five and the fixed pulley three are mutually vertical, so that mutual interference caused by 4 strands of traction ropes formed after encircling can be effectively avoided.

According to the further technical scheme, the electrode bar fixing part is a single-slit or double-slit half sleeve, and can be disassembled, so that the electrode bar is convenient to install and disassemble; the bottom end face of the half sleeve is fixedly connected with a sealing ring, so that mine dust is prevented from overflowing.

According to the technical scheme, the guide frame is internally fixed with the rolling rail piece which is in rolling connection with the guide pillar, so that the guide frame drives the lifting arm to ascend and descend in a sliding upgrading mode to roll, and the lifting arm is more convenient and efficient to ascend and descend.

According to the technical scheme, the rolling rail piece comprises a connecting shaft and rolling wheels, wherein the connecting shaft is arranged in the guide frame and is connected with the two frame plates opposite to the guide frame, the rolling wheels are sleeved at two ends of the connecting shaft, and the rolling rail piece is convenient to install and good in rolling effect through the matching of the connecting shaft and the rolling wheels.

In a further technical scheme, the number of the rolling rail parts is even, and the rolling rail parts are symmetrically distributed in the guide frame, so that the rolling friction force achieves the technical effect of uniform sharing.

According to the further technical scheme, the central section of the roller is step-shaped, the step is clamped on the side of the guide pillar, and the roller rolls and plays a role in guiding.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the furnace top device of the high-efficiency tin concentrate smelting electric furnace, the electrode rods are symmetrically arranged on the periphery of the middle opening of the furnace top, materials can be evenly dropped between the electrode rods when being fed through the middle opening, and the technical effect of evenly heating and smelting the materials is achieved;

(2) according to the furnace top device of the high-efficiency tin concentrate smelting electric furnace, a plurality of tin concentrate lifting mechanisms are not required to be arranged, and one tin concentrate lifting mechanism is connected with one tin concentrate transferring mechanism, so that the purpose of feeding materials through the opening in the middle of the furnace top can be achieved; 3 electrode bar lifting mechanisms are not needed to be arranged, and the purpose of balanced heating smelting of the materials can be achieved;

(3) according to the furnace top device of the high-efficiency tin concentrate smelting electric furnace, the stable double-column vertical fixing frame is fixed on a working surface, and the vertical guide type lifting guide pillar is matched with the guide frame and also has the double effects of supporting and guiding; the hoisting type lifting arm is matched with the fixed pulley and the movable pulley in the pulley mechanism, so that the technical effects of accurately aligning the mounting opening to mount the electrode bar and improving the replacement efficiency are achieved;

(4) according to the furnace top device of the high-efficiency tin concentrate smelting electric furnace, the double-acting pulley and the fixed pulley in the pulley mechanism act synergistically, so that the operation is more labor-saving, and the lifting weight can be effectively improved;

(5) according to the furnace top device of the high-efficiency tin concentrate smelting electric furnace, the three directions of the fixed pulley five and the fixed pulley are mutually vertical, but one of the two pulleys is vertical and the other is transversely arranged, so that the mutual interference caused by the formation of 4 strands of traction ropes after the double-acting pulleys are encircled can be effectively avoided;

(6) the furnace top device of the high-efficiency tin concentrate smelting electric furnace has the advantages that the half sleeve type electrode rod fixing piece is detachable, and the electrode rod can be conveniently installed and disassembled;

(7) according to the furnace top device of the efficient tin concentrate smelting electric furnace, the rail rolling piece enables the guide frame to drive the lifting arm to lift from sliding to rolling, and the lifting arm is more convenient and efficient to lift; the symmetrically distributed connecting shafts and the roller rail pieces matched with the rollers enable rolling friction to achieve the technical effect of uniform sharing, lifting of the lifting arm is more efficient and labor-saving, and the service life of the lifting arm can be prolonged;

(8) according to the furnace top device of the high-efficiency tin concentrate smelting electric furnace, the step-shaped roller is clamped on the side edge of the guide pillar, and the roller rolls and plays a role in guiding.

Drawings

FIG. 1 is a schematic structural view of a furnace top device of the high-efficiency tin concentrate smelting electric furnace of the invention;

FIG. 2 is a schematic structural view of a tin concentrate transferring mechanism in the present invention;

FIG. 3 is a schematic view of the electrode rod lifting mechanism according to the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3;

FIG. 5 is a schematic structural view of an electrode rod elevating mechanism according to embodiment 2;

FIG. 6 is a schematic diagram of the lifting state of the electrode rod according to the present invention.

In the figure: 1-vertical fixed mount; 2-a lifting arm; 3-a winch; 4-a pulley mechanism; 5-supporting the platform; 6-electrode bar; 7-smelting an electric furnace; 8-tin concentrate lifting mechanism; 9-a tin concentrate transfer mechanism; 10. an electrode bar lifting mechanism; 11-a crane boom; 12-a pillar; 13-guide posts; 21-a guide frame; 22-electrode bar fixing member; 23-a roller rail member; 24-a sealing ring; 31-a hauling rope; 41-fixed pulley I; 42-fixed pulley II; 43-fixed pulley III; 44-fixed pulley four; 45-fixed pulley five; 46-a movable pulley I; 47-movable pulley II; 71-furnace roof; 91-a support; 92, a blanking port; 111-via one; 112-via two; 231-a roller; 232-connecting shaft.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

Example 1

The furnace top device of the high-efficiency tin concentrate smelting electric furnace of the embodiment comprises a supporting platform 5, a tin concentrate transferring mechanism 9 and an electrode rod lifting mechanism 10, wherein the tin concentrate transferring mechanism 9 and the electrode rod lifting mechanism 10 are fixed on the supporting platform 5, and after a furnace body of a smelting electric furnace 7 penetrates through the supporting platform 5, the furnace top 71 of the smelting electric furnace protrudes out of the supporting platform 5; the electrode rod lifting mechanisms 10 are symmetrically and vertically arranged around the furnace top 71; the middle part of the furnace top 71 is opened, and symmetrically distributed electrode bar inserting openings are also formed on the furnace top 71 surrounding the middle part opening; as shown in fig. 1 and 2, the feed end of the tin concentrate transferring mechanism 9 is transversely fixed on the supporting platform 5 through a bracket 91, and the blanking port 92 at the discharge end is hermetically communicated with the middle opening of the furnace top 71, i.e. after the blanking port 92 is communicated with the middle opening, the fixed connection position is sealed through a sealing ring or a sealing gasket; the electrode rod lifting mechanism 10 inserts the electrode rods 6 into the electrode rod insertion holes of the furnace top 71, the electrode rods 6 are symmetrically arranged on the periphery of the middle opening of the furnace top 71, and materials can be evenly dropped between the electrode rods 6 when fed through the middle opening, so that the technical effect of evenly heating the materials is achieved. The tin concentrate temporary storage device also comprises a tin concentrate lifting mechanism 8 which is generally a lifting auger, wherein a bottom feeding port of the tin concentrate lifting mechanism 8 is communicated with the tin concentrate temporary storage bin, an upper discharging port of the tin concentrate lifting mechanism 8 is communicated with a feeding end of a tin concentrate transfer mechanism 9, and the tin concentrate transfer mechanism 9 is generally an auger type conveyor; the number of the electrode rod lifting mechanisms 10 is three, and the finished product is distributed around the furnace top 71; the electrode rod lifting mechanism 10 comprises a vertical fixing frame 1, a lifting arm 2, a winch 3 and a pulley mechanism 4; the electrode bar lifting mechanism 10 is fixed on the supporting platform 5 through the vertical fixing frame 1, a plurality of tin concentrate lifting mechanisms 8 are not required to be arranged, and the purpose of feeding materials through the opening in the middle of the furnace top 71 can be achieved by connecting one tin concentrate lifting mechanism 8 with one tin concentrate transferring mechanism 9; the purpose of uniformly heating the material can be achieved without arranging a plurality of electrode

rod lifting mechanisms

10 and 3 electrode rod lifting mechanisms in a delta-shaped arrangement. The vertical fixing frame 1 comprises a vertical pillar 12 and a supporting and guiding pillar 13 arranged on the inner side of the pillar 12, and the supporting and guiding pillar 13 has double functions of supporting and guiding; the crane further comprises a crane boom 11 transversely and fixedly connected to the top ends of the

support columns

12 and 13; one end of the lifting arm 2 is fixedly connected with a guide frame 21 which is sleeved on the support guide post 13 and is connected with the support guide post in a sliding way, and the other end of the lifting arm is fixedly connected with an electrode bar fixing piece 22; the pulley mechanism 4 comprises a first fixed pulley 41, a second fixed pulley 42, a third fixed pulley 43 and a fourth fixed pulley 44 which are arranged and fixed on the upper surface of the crane boom 11 in sequence, and is parallel to the third fixed pulley 43, and further comprises a first movable pulley 46 fixed on the upper surface of the lifting arm 2, and a first through hole 111 and a second through hole 112 are respectively drilled on the crane boom 11 close to the second fixed pulley 42 and the third fixed pulley 43; the winch 3 is fixed on the outer side of the lower part of the pillar 12, and the free end of the traction rope 31 sequentially passes through the first fixed pulley 41, the fourth fixed pulley 44, the second through hole 112 downwards, the first movable pulley 46, the second through hole 112 upwards, the third fixed pulley 43, the second fixed pulley 42 and the first through hole 111 downwards and is fixedly connected with the guide frame 21. Vertical mount 1 through stable two column types is fixed in tin concentrate electric stove top, and the cooperation of the perpendicular guide post 13 and the guide frame 21 that guide lift is gone up and down to and fixed pulley and movable pulley's cooperation in the lifing arm 2 of hoist formula and pulley mechanism 4 reaches the technological effect of accurate alignment installing port installation electrode bar 6 and improvement change efficiency.

Example 2

The basic structure of the furnace top device of the high-efficiency tin concentrate smelting electric furnace is the same as that of the furnace top device of the embodiment 1, and the differences and the improvements are as follows: as shown in fig. 5, the pulley mechanism 4 further includes a fixed pulley five 45 near the second through hole 112 and a movable pulley two 47 juxtaposed with the movable pulley one 46 on the upper surface of the lifting arm 2, the fixed pulley five 45 and the fixed pulley three 43 being arranged on both sides of the second through hole 112; the free end of the traction rope 31 sequentially bypasses the first fixed pulley 41, the fourth fixed pulley 44, the second through hole 112, the first movable pulley 46, the second through hole 112, the fifth fixed pulley 45, the second through hole 112, the second movable pulley 47, the second through hole 112, the third fixed pulley 43, the second fixed pulley 42 and the first through hole 111, and is fixedly connected to the guide frame 21. The wheel directions of the fifth fixed pulley 45 and the third fixed pulley 43 are mutually vertical, so that mutual interference caused by 4 strands of traction ropes 31 formed after winding can be effectively avoided. The electrode bar fixing part 22 is a single-slit or double-slit half sleeve, can be disassembled, and is convenient for assembling and disassembling the electrode bar 6. The electrode rod 6 is ready to be lifted after being tightened by the half sleeve as shown in figure 6. The bottom end face of the half sleeve is fixedly connected with a sealing ring 24, so that mine dust is prevented from overflowing when the middle opening is blanked.

Example 3

The basic structure of the furnace top device of the high-efficiency tin concentrate smelting electric furnace is the same as that of the furnace top device of the embodiment 2, and the differences and the improvements are as follows: as shown in fig. 3 and 4, a roller rail member 23 in rolling connection with the support pillar 13 is fixed in the guide frame 21, so that the guide frame 21 drives the lifting arm 2 to move up and down from sliding to rolling, and the lifting arm 2 is lifted and lowered more conveniently and efficiently. The rolling rail piece 23 comprises a connecting shaft 232 which is arranged in the guide frame 21 and is used for connecting two frame plates opposite to the guide frame 21, and a roller 231 which is sleeved at two ends of the connecting shaft 232, and is convenient to install and good in rolling effect through the matching of the connecting shaft 232 and the roller 231. The number of the rolling rail members 23 is even, and the rolling rail members are symmetrically distributed in the guide frame 21, for example, when the number of the rolling rail members is 4, the rolling rail members can be symmetrically installed at four corners of the frame of the guide frame 21, so that the rolling friction force can be uniformly shared. The central section of gyro wheel 231 is the step form, is the T font, and the step, T font card promptly are at the side of a guide pillar 13, and when rolling, play the effect of direction, when avoiding installation or dismantlement, the skew mounting hole of electrode bar 6.

The high-efficiency electric furnace roof device for smelting tin concentrate of the embodiment, 3 electrode rod lifting mechanisms 10 arranged in a shape like a Chinese character 'pin' can install 3 electrode rods 6, the electrode rods 6 are fixed on the furnace roof 71 as fixing devices of the electrode rods 6, when the electrode rods 6 reach the service life of the electrode rods 6, the electrode rods 6 become waste electrode rods 6, the 3 electrode rod lifting mechanisms 10 lift 3 waste electrode rods 6 at the same time, the waste electrode rods 6 are disassembled, the electrode rods 6 are simultaneously replaced and then inserted into electrode rod insertion holes, the replacement efficiency is high, therefore, the 3 electrode rod lifting mechanisms 10 can serve as dual functions for fixing the electrode rods 6 after being replaced, and under the synergistic effect of a auger type conveyor blanking from a middle opening on the furnace roof 71, the technical effect of material uniform temperature rise smelting is achieved.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. The utility model provides a high-efficient tin concentrate smelts electric stove furnace roof device which characterized in that: the device comprises a supporting platform (5), and a tin concentrate transfer mechanism (9) and an electrode rod lifting mechanism (10) which are fixed on the supporting platform (5), wherein after a furnace body of a smelting electric furnace (7) penetrates through the supporting platform (5), a furnace top (71) of the smelting electric furnace protrudes out of the supporting platform (5); the electrode bar lifting mechanisms (10) are symmetrically and vertically arranged around the furnace top (71); the middle part of the furnace top (71) is opened, and symmetrically distributed electrode bar inserting openings are also formed in the furnace top (71) surrounding the middle part opening; the feed end of the tin concentrate transfer mechanism (9) is transversely fixed on the supporting platform (5) through a bracket (91) of the tin concentrate transfer mechanism, and a blanking port (92) at the discharge end of the tin concentrate transfer mechanism is communicated with the middle opening of the furnace top (71) in a sealing manner; the electrode rod lifting mechanism (10) inserts the electrode rod (6) into an electrode rod insertion opening of the furnace top (71).

2. The furnace top device of the high-efficiency tin concentrate smelting electric furnace according to claim 1, characterized in that: the tin concentrate temporary storage device is characterized by also comprising a tin concentrate lifting mechanism (8), wherein a bottom feeding hole of the tin concentrate lifting mechanism (8) is communicated with the tin concentrate temporary storage bin, and an upper discharging hole is communicated with a feeding end of the tin concentrate transfer mechanism (9); the number of the electrode rod lifting mechanisms (10) is three, and the finished product is distributed around the furnace top (71); the electrode rod lifting mechanism (10) comprises a vertical fixing frame (1), a lifting arm (2), a winch (3) and a pulley mechanism (4); the electrode bar lifting mechanism (10) is fixed on the supporting platform (5) through the vertical fixing frame (1).

3. The furnace top device of the high-efficiency tin concentrate smelting electric furnace according to claim 2, characterized in that: the vertical fixing frame (1) comprises a vertical support column (12) and a support guide column (13) on the inner side of the support column (12), and further comprises a crane boom (11) which is transversely and fixedly connected to the top ends of the support column (12) and the support guide column (13); the support column (12) and the support guide column (13) are both fixedly connected to the supporting platform (5);

one end of the lifting arm (2) is fixedly connected with a guide frame (21) which is sleeved on the support guide post (13) and is connected with the support guide post in a sliding way, and the other end of the lifting arm is fixedly connected with an electrode bar fixing piece (22);

the pulley mechanism (4) comprises a first fixed pulley (41), a second fixed pulley (42), a third fixed pulley (43) and a fourth fixed pulley (44) which is parallel to the third fixed pulley (43) which are sequentially arranged and fixed on the upper surface of the crane boom (11), and further comprises a first movable pulley (46) which is fixed on the upper surface of the lifting arm (2), and the crane boom (11) close to the second fixed pulley (42) and the third fixed pulley (43) is respectively provided with a first through hole (111) and a second through hole (112) in a hole way;

the winch (3) is fixed on the outer side of the lower portion of the support column (12), and the free end of the traction rope (31) of the winch sequentially bypasses the first fixed pulley (41), the fourth fixed pulley (44), the second through hole (112) downwards, the first movable pulley (46), the second through hole (112) upwards, the third fixed pulley (43), the second fixed pulley (42) downwards, the first through hole (111) and then is fixedly connected to the guide frame (21).

4. The efficient tin concentrate smelting electric furnace top device according to claim 3, characterized in that: the pulley mechanism (4) further comprises a fixed pulley five (45) close to the through hole two (112) and a movable pulley two (47) which is arranged on the upper surface of the lifting arm (2) in parallel with the movable pulley one (46), and the fixed pulley five (45) and the fixed pulley three (43) are arranged on two sides of the through hole two (112) in a row; the free end of the traction rope (31) sequentially bypasses the first fixed pulley (41), the fourth fixed pulley (44), the second through hole (112) downwards, the first movable pulley (46), the second through hole (112) upwards, the fifth fixed pulley (45), the second through hole (112) downwards, the second movable pulley (47), the second through hole (112) upwards, the third fixed pulley (43), the second fixed pulley (42) downwards, the first through hole (111) and then is fixedly connected to the guide frame (21).

5. The efficient tin concentrate smelting electric furnace top device according to claim 4, characterized in that: the wheel directions of the fixed pulley five (45) and the fixed pulley three (43) are mutually vertical.

6. The efficient tin concentrate smelting electric furnace top device according to claim 4, characterized in that: the electrode bar fixing part (22) is a single-slit or double-slit half sleeve; and the bottom end surface of the half sleeve is fixedly connected with a sealing ring (24).

7. The efficient tin concentrate smelting electric furnace top device according to claim 4, characterized in that: a rolling rail piece (23) which is in rolling connection with the support guide post (13) is fixed in the guide frame (21).

8. The furnace top device of the high-efficiency tin concentrate smelting electric furnace according to claim 7, characterized in that: the rolling rail piece (23) comprises a connecting shaft (232) which is arranged in the guide frame (21) and is connected with two frame plates opposite to the guide frame (21), and rolling wheels (231) which are sleeved at two ends of the connecting shaft (232).

9. The furnace top device of the high-efficiency tin concentrate smelting electric furnace according to claim 8, characterized in that: the rolling rail members (23) are even in number and are symmetrically distributed in the guide frame (21).

10. The furnace top device of the high-efficiency tin concentrate smelting electric furnace according to claim 8, characterized in that: the central section of the roller (231) is step-shaped, and the step is clamped at the side of the support guide post (13).