Precious metal smelting top-blowing silver separating furnace device

Abstract

The utility model discloses a top-blowing silver separating furnace device for precious metal smelting. The top-blowing silver separating furnace device comprises a furnace body, a hearth used for containing liquid is arranged in the furnace body, the furnace body is connected with a driving device so that the furnace body can rotate, a rolling ring is arranged on the furnace body, a riding wheel set is arranged below the furnace body, and the rolling ring is arranged on the riding wheel set so as to bear the furnace body. An oxygen lance opening, a slag outlet and a chute opening are formed in the upper part of the furnace body; a coarse alloy outlet is formed in the furnace wall in the middle of the furnace body, a first blind plate and a second blind plate are arranged at the two ends of the furnace body respectively, and a cold feeding port is formed in the first blind plate. The top-blowing mode can greatly reduce the pressure of the silver separating furnace on metal, the contact area of the oxygen lance and a molten pool in the blowing process is increased, the blowing oxidation effect can be improved through the top-blowing mode, the telescopic device is additionally arranged at the upper end of the oxygen lance, and an operator can automatically adjust the insertion depth of the oxygen lance according to the thickness of the molten pool in the furnace and the blowing condition; the blowing efficiency is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of precious metal smelting and recycling technology, and in particular to a top-blown silver separation furnace device for precious metal smelting. Background Technology

[0002] Precious metal smelting production systems use lead-copper anode mud as raw material. After smelting in a precious lead furnace, precious lead and reducing slag are produced. Most precious metal smelting enterprises process the produced precious lead using bottom blowing or furnace opening tuyere insertion for oxidation refining. In traditional bottom blowing oxidizers, the oxygen lance is inserted into the molten pool in a relatively fixed position during production. Therefore, it is necessary to ensure that the height of the precious lead molten pool in the furnace is within a certain range. When the amount of precious lead in a single furnace is small, it cannot be directly processed. At the same time, traditional bottom blowing furnaces use siphoning to discharge slag and lead, which leads to an increase in the amount of precious lead occupying the furnace bottom, increasing the system's metal occupancy and affecting the direct recovery rate of precious metals. Traditional bottom blowing oxidizers have a complex structure, a high degree of precious lead oxidation, and high difficulty in controlling process operation nodes. During the production process of converter oxidation refining with furnace opening tuyere insertion, manual participation is required throughout the entire process. The degree of automation is low, the labor intensity of employees is high, and the on-site working environment is poor. Summary of the Invention

[0003] This utility model addresses the shortcomings of existing technologies by providing a top-blown silver separation furnace device for precious metal smelting that features a simpler structure, more convenient operation, higher degree of automation, lower labor intensity for workers, and a better on-site working environment.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a top-blown silver separation furnace device for precious metal smelting, comprising a furnace body, the furnace body having a furnace chamber for holding liquid, characterized in that: the furnace body is connected to a driving device through a transmission mechanism to form a rotatable structure, a rolling ring is provided on the furnace body, and a roller assembly is provided below the furnace body, the rolling ring being placed on the roller assembly to form a supporting structure for the furnace body; an oxygen lance port for inserting an oxygen lance, a slag outlet and a chute port are provided at the upper part of the furnace body, and a device for generating liquid precious lead is connected through the chute port; a crude alloy outlet is provided on the furnace wall at the middle position of the furnace body, and a first blind plate and a second blind plate are respectively provided at both ends of the furnace body, with a cold feed port provided on the first blind plate.

[0005] Furthermore, the furnace body is cylindrical in shape, and a ring-shaped gear is provided near one end of the furnace body. The gear meshes with the gear of the transmission mechanism to form a structure that drives the furnace body to rotate around the central axis.

[0006] Further, there are two rolling rings, namely the first rolling ring and the second rolling ring, and the two rolling rings are fixedly welded in parallel at an interval on the circumferential surface of the furnace body; the supporting roller group includes a first supporting roller group and a second supporting roller group. On both sides below the furnace body, two groups of first supporting roller groups and two groups of second supporting roller groups are respectively arranged at positions corresponding to the first rolling ring and the second rolling ring. The first rolling ring is supported by the two first supporting roller groups, and the second rolling ring is supported by the two second supporting roller groups.

[0007] Further, a second oxygen nozzle is also arranged at the middle position of the furnace body. The second oxygen nozzle and the first oxygen nozzle are staggered in position, and a telescopic oxygen lance can be inserted through the first oxygen nozzle or the second oxygen nozzle.

[0008] Further, the first supporting roller group and the second supporting roller group are respectively installed on the corresponding supporting seats. The supporting seats are arranged below the furnace body. The two groups of first supporting roller groups and the two groups of second supporting roller groups are symmetrically arranged on both sides below the furnace body, and both form a 30-degree angle with the vertical plane passing through the central axis of the furnace body.

[0009] Further, a "rice" - shaped reinforcing framework is arranged on the outer sides of the first blind plate and the second blind plate to form a reinforcing structure for the blind plates.

[0010] Further, the "rice" - shaped reinforcing framework is welded by steel plates with a thickness of 8 - 12 mm. The first blind plate and the second blind plate are both locked and fixed to the furnace body by bolts.

[0011] Further, the first oxygen nozzle, the second oxygen nozzle, the slag outlet and the crude alloy outlet are arranged between the first rolling ring and the second rolling ring, and the chute outlet is arranged between the second rolling ring and the second blind plate.

[0012] Further, the driving device uses a motor, the transmission mechanism uses a gear配合a transmission shaft. The transmission shaft is connected to the motor, and the gear is fixed on the transmission shaft.

[0013] The structure of the present utility model is relatively simple. By adopting the top - blowing method, the occupation of silver - separating furnace on metal can be greatly reduced, the contact area between the oxygen lance blowing process and the molten pool can be increased, the top - blowing method can improve the blowing oxidation effect. An expansion device is added at the upper end of the oxygen lance, enabling the operator to automatically adjust the insertion depth of the oxygen lance according to the thickness of the molten pool in the furnace and the blowing situation, so as to improve the blowing efficiency and reduce the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front - view schematic diagram of the present utility model;

[0015] Figure 2 is a back - view schematic diagram of the present utility model;

[0016] Figure 3 is a schematic diagram of the right side of the main part of the present utility model;

[0017] Figure 4 This is a schematic diagram of the left side of the main body of this utility model.

[0018] In the figure, 1 is the furnace body, 11 is the first oxygen lance nozzle, 12 is the second oxygen lance nozzle, 13 is the chute opening, 14 is the slag outlet, 15 is the crude alloy outlet, 2 is the drive device, 21 is the transmission mechanism, 31 is the first support roller group, 32 is the second support roller group, 33 is the support base, 4 is the gear ring, 51 is the first rolling ring, 52 is the second rolling ring, 6 is the first blind plate, 61 is the cold feed port, 7 is the second blind plate, and 8 is the reinforcing frame. Detailed Implementation

[0019] In this embodiment, refer to Figures 1-4 The top-blown silver separation furnace device for precious metal smelting includes a furnace body 1, which has a furnace chamber for holding liquid (liquid precious lead). The furnace body 1 is connected to a drive device 2 via a transmission mechanism 21 to form a rotatable structure. A rolling ring is provided on the furnace body 1, and a roller assembly is provided below the furnace body 1. The rolling ring is placed on the roller assembly to form a support structure for the furnace body. An oxygen lance port for inserting an oxygen lance, a slag outlet 14, and a chute 13 are provided at the upper part of the furnace body 1. A device for producing liquid precious lead (such as a bottom-blown precious lead furnace) is connected through the chute 13. A crude alloy outlet 15 is provided on the furnace wall at the middle position of the furnace body 1. A first blind plate 6 and a second blind plate 7 are provided at both ends of the furnace body 1, and a cold feed port 61 is provided on the first blind plate 6.

[0020] The furnace body 1 is cylindrical in shape. A ring gear 4 is provided on the furnace body 1 near one end. The ring gear 4 meshes with the gear of the transmission mechanism 21 to form a structure that drives the furnace body to rotate around the central axis. The driving device provides power and braking for the rotation of the furnace body 1.

[0021] The furnace body 1 has two roller rings, a first roller ring 51 and a second roller ring 52, which are welded parallel to each other and fixed to the circumference of the furnace body 1 at a distance from each other. The support roller assembly includes a first support roller assembly 31 and a second support roller assembly 32. Two sets of first support roller assemblies 31 and two sets of second support roller assemblies 32 are respectively arranged on both sides below the furnace body 1, corresponding to the positions of the first roller ring 51 and the second roller ring 52. The first roller ring 51 supports the first roller ring 51, and the two sets of second support roller assemblies 32 support the second roller ring 52. The first roller ring 51 supports the furnace body 1 and assists in its rotation, while the second roller ring 52 supports the furnace body 1 and facilitates its rotation.

[0022] A second oxygen lance 12 is also provided in the middle of the furnace body 1. The second oxygen lance 12 is staggered from the first oxygen lance 11. The retractable oxygen lance can be inserted through the first oxygen lance 11 or the second oxygen lance 12. The second oxygen lance 12 is mainly used as a backup.

[0023] The first supporting roller group 31 and the second supporting roller group 32 are respectively installed on the corresponding supporting seats 33, and the supporting seats 33 are arranged below the furnace body 1. The two groups of first supporting roller groups 31 and the two groups of second supporting roller groups 32 are symmetrically arranged on both sides below the furnace body 1 and both form a 30-degree angle with the vertical plane passing through the central axis of the furnace body 1.

[0024] On the outer sides of both the first blind plate 6 and the second blind plate 7, a "rice" - shaped reinforcing framework 8 is provided to form a reinforcing structure for the blind plates. The diameter of the two blind plates is 2680 mm.

[0025] The "rice" - shaped reinforcing framework 8 is welded with steel plates with a thickness of 8 - 12 mm (such as 10 mm). Both the first blind plate 6 and the second blind plate 7 are locked and fixed to the furnace body 1 through bolts.

[0026] The first oxygen nozzle 11, the second oxygen nozzle 12, the slag outlet 14 and the crude alloy outlet 15 are arranged between the first rolling ring 51 and the second rolling ring 52, and the chute opening 13 is arranged between the second rolling ring 52 and the second blind plate 7.

[0027] The driving device 2 uses a motor, and the transmission mechanism 21 uses gears to cooperate with a transmission shaft. The transmission shaft is connected to the motor, and the gears are fixed on the transmission shaft. [[ID=十四]]

[0028] The thickness of the furnace body 1 is 30 mm, the diameter is 2620 mm, the length is 4200 mm, and refractory bricks are laid inside.

[0029] The inner diameter of the first rolling ring 51 is 2620 mm, the outer diameter is 3360 mm, the width is 500 mm, and it is sleeved and welded at one end of the furnace body 1, at a position where the center line is about 1200 mm away from the first blind plate 6. [[ID=十九]]

[0030] The inner diameter of the gear ring 4 is 2620 mm, the outer diameter is 3460 mm, the width is 500 mm, the tooth height is 4 mm, the tooth width is 6 mm, the tooth thickness is 1.5 mm, and it is sleeved and welded at one end of the furnace body 1 close to the first blind plate 6, at a position where the center line is about 700 mm away from the first blind plate 6. The inner diameter of the second rolling ring 52 is 2620 mm, the outer diameter is 3360 mm, the width is 500 mm, and it is sleeved and welded at the other end of the furnace body 1, at a position where the center line is about 1200 mm away from the second blind plate 7.

[0031] The center line of the chute opening 13 is about 750 mm away from the second blind plate 7, directly above the furnace body 1, with a size of 500 mm × 500 mm, and is used for feeding liquid precious lead into the silver - separating top - blowing furnace.

[0032] The first oxygen nozzle 11 is arranged directly above the furnace body 1, with a diameter of 50 mm, and the center line is about 1700 mm away from the second blind plate 7, and is used for the insertion of the oxygen lance of the silver - separating top - blowing furnace. The second oxygen nozzle 12 is arranged directly above the furnace body 1, with a diameter of 50 mm, and the center line is about 2000 mm away from the second blind plate 7, and is used for the backup insertion of the oxygen lance of the silver - separating top - blowing furnace.

[0033] Slag outlet 14 is a 400mm×400mm opening used for slag discharge from the top-blown silver furnace.

[0034] The cold material inlet 61 opens at the first blind plate 6 and is a slanted cylinder with a diameter of 500mm.

[0035] The crude alloy outlet 15 is a 200mm×200mm opening on the back of the furnace body, used to discharge the crude alloy liquid in the top-blown silver separation furnace.

[0036] Working process: Liquid precious lead produced by the bottom-blown precious lead furnace enters the furnace body 1 through a chute opening 13. Solid cold precious lead blocks enter the furnace body through the cold material inlet 61. The oxygen lance with its own telescopic function extends from the first oxygen lance port 11 or the second oxygen lance port 12 into the furnace chamber to 15 cm below the liquid surface to blow the molten pool. After a period of reaction, the blocked slag outlet 14 is opened to release the slag. Crude alloy continuously deposits at the bottom of the furnace body, and the crude alloy liquid level gradually rises and is released from the crude alloy outlet 15. When a converter is required, the oxygen lance is first pulled out from the oxygen lance port, and the gear ring 4 is driven by the drive device 2 to rotate the furnace body 1. The converter is completed through the cooperation of the first rolling ring 51, the second rolling ring 52, the first support roller group 31, and the second support roller group 32.

[0037] The top-blown silver separator furnace features two oxygen lances at the top, increasing the contact area between the lances and the molten pool during the blowing process. The top-blown method enhances the oxidation effect. An extension device can be added to the upper end of the oxygen lance, allowing operators to automatically adjust the lance insertion depth based on the thickness of the molten pool and the blowing conditions, thereby improving blowing efficiency. During production, operators can visually assess the furnace's operation through the slag outlet and make rapid adjustments, facilitating worker control. Compared to traditional bottom-blown furnaces, the top-blown silver separator furnace further reduces metal congestion within the furnace. During slag and lead discharge operations, the entire molten metal pool at the bottom can be drained, eliminating visible metal congestion and improving the direct recovery rate of gold and silver in the precious metals system.

[0038] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A top-blown silver separation furnace apparatus for precious metal smelting, comprising a furnace body, the furnace body having a furnace chamber for containing liquid, characterized in that: The furnace body is connected with a driving device through a transmission mechanism to form a rotatable structure. A girth is arranged on the furnace body, and a set of supporting rollers is arranged below the furnace body. The furnace body is supported by placing the girth on the set of supporting rollers to form a bearing structure for the furnace body. An oxygen lance inlet, a slag outlet and a chute outlet for extending an oxygen lance are arranged at the upper part of the furnace body. A device for generating liquid lead bullion is connected through the chute outlet. A crude alloy outlet is arranged on the furnace wall at the middle position of the furnace body. A first blind plate and a second blind plate are respectively arranged at two ends of the furnace body, and a cold feed inlet is arranged on the first blind plate.

2. The top-blown silver separation furnace apparatus for precious metal smelting according to claim 1, characterized in that: The furnace body is of a cylindrical shape. An annular gear ring is arranged at a position close to one end of the furnace body. The gear ring meshes with the gear of the transmission mechanism to form a structure for driving the furnace body to rotate around the central axis.

3. The top-blown silver separation furnace apparatus for precious metal smelting according to claim 2, characterized in that: There are two girths, namely a first girth and a second girth. The two girths are fixedly welded in parallel on the circumferential surface of the furnace body at an interval. The set of supporting rollers includes a first set of supporting rollers and a second set of supporting rollers. Two sets of first set of supporting rollers and two sets of second set of supporting rollers are respectively arranged at positions corresponding to the first girth and the second girth on both sides below the furnace body. The first girth is supported by the two first sets of supporting rollers, and the second girth is supported by the two second sets of supporting rollers.

4. The top-blown silver separation furnace apparatus for precious metal smelting according to claim 1, characterized in that: A second oxygen lance inlet is also arranged at the middle position of the furnace body. The second oxygen lance inlet and the first oxygen lance inlet are staggered with each other. The retractable oxygen lance is extended through the first oxygen lance inlet or the second oxygen lance inlet.

5. The top-blown silver separation furnace apparatus for precious metal smelting according to claim 3, characterized in that: The first set of supporting rollers and the second set of supporting rollers are respectively installed on corresponding supporting seats. The supporting seats are arranged below the furnace body. The two sets of first set of supporting rollers and the two sets of second set of supporting rollers are symmetrically arranged on both sides below the furnace body, and both form an angle of 30 degrees with the vertical plane passing through the central axis of the furnace body.

6. The top-blown silver separation furnace apparatus for precious metal smelting according to claim 1, characterized in that: A "rice"-shaped reinforcing framework is arranged on the outer sides of the first blind plate and the second blind plate to form a reinforcing structure for the blind plates.

7. The top-blown silver separation furnace apparatus for precious metal smelting according to claim 6, characterized in that: The "rice"-shaped reinforcing framework is welded by steel plates with a thickness of 8-12 mm. The first blind plate and the second blind plate are both locked and fixed to the furnace body through bolts.

8. The top-blown silver separation furnace apparatus for precious metal smelting according to claim 3, characterized in that: The first oxygen lance inlet, the second oxygen lance inlet, the slag outlet and the crude alloy outlet are arranged between the first girth and the second girth, and the chute outlet is arranged between the second girth and the second blind plate.

9. The top-blown silver separation furnace apparatus for precious metal smelting according to claim 2, characterized in that: The driving device adopts a motor, and the transmission mechanism adopts a gear cooperating with a transmission shaft. The transmission shaft is connected with the motor, and the gear is fixed on the transmission shaft.

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