Copper recovery reducing agent spray gun and purification process thereof

Abstract

The invention discloses a copper recovery reducing agent spray gun and a purification process thereof, and belongs to the field of smelting furnace spray gun devices. The device comprises a spray pipe of which a spray gun penetrates through a furnace top, wherein a first guide sleeve is arranged on the furnace top; a plurality of fixing rods are fixed on the top side surface of the furnace top on the peripheral side of the first guide sleeve; a first supporting plate and a second supporting plate are sequentially fixed on the fixing rods from bottom to top; the top of the spraying pipe penetrates through the first supporting plate and the second supporting plate. A first driving structure for driving the spraying pipe to move in the axial direction is arranged on the upper surface of the second supporting plate; the purification process comprises the step of intermittently controlling the spray pipe to move upwards in the vertical direction to adjust the insertion depth of the spray gun in the copper melt. By arranging the first driving structure driven by the telescopic cylinder, the spraying pipe can be accurately controlled to do lifting motion in the axial direction of the spraying pipe, the depth of the spraying head in the copper melt is allowed to be flexibly adjusted in different refining stages, and therefore the reaction efficiency is optimized.

Description

Technical Field

[0001] This invention relates to the field of furnace spray gun devices, and particularly to a copper recovery reducing agent spray gun and its purification process. Background Technology

[0002] In the pyrometallurgical refining process of copper, the reduction stage is a crucial step. This stage requires injecting a reducing agent (such as natural gas, ammonia, or petroleum gas) into the molten crude copper using a spray gun to remove cuprous oxide dissolved in the copper liquid, thereby obtaining anode copper with the required oxygen content.

[0003] Traditional reducing agent spray guns are usually fixed, which cannot flexibly and precisely adjust the height of the bottom of the spray gun from the surface of the copper molten metal according to process requirements (such as the depth of the molten pool and the reaction stage). As a result, this fixed mode may lead to uneven distribution of the reducing agent inside the molten metal, low reaction efficiency, affecting the quality of the final anode copper, and may also cause waste of the reducing agent. Summary of the Invention

[0004] This invention provides a copper recovery reducing agent spray gun and its purification process, which can solve the problem in the prior art that the height of the bottom of the spray gun cannot be adjusted according to process requirements.

[0005] A copper recovery reducing agent spray gun includes a spray pipe penetrating the top of a furnace, on which a first guide sleeve is provided. Several fixing rods are fixed to the top side of the furnace top, located around the first guide sleeve. A first support plate and a second support plate are sequentially fixed to each fixing rod from bottom to top. The top of the spray pipe passes through the first and second support plates. A first driving structure for driving the spray pipe to move axially is provided on the upper surface of the second support plate. The first driving structure includes an annular component surrounding the spray pipe. At least three first grooves are provided on the inner wall of the annular component. A first telescopic module that extends and retracts horizontally is fixed inside each of the first grooves. The end of the first telescopic module is provided with a first abutment against the outer wall of the spray pipe. A protruding edge is provided on the outer periphery of the annular component. At least one telescopic cylinder is connected to the bottom side of the protruding edge. The telescopic cylinder is fixed to the upper surface of the second support plate. A gap is provided between the annular component and the spray pipe. A second guide sleeve is penetrating through the middle of the second support plate. The spray pipe passes through both the first and second guide sleeves.

[0006] Furthermore, a third support plate is fixed on the fixing rod located between the first support plate and the second support plate. The upper surface of the third support plate is provided with a second driving structure that drives the nozzle to move along its axial direction. The second driving structure and the first driving structure have the same structure.

[0007] Furthermore, at least one guide telescopic rod is connected to the bottom side of the convex edge, and the bottom end of the guide telescopic rod is fixed to the upper surface of the third support plate / second support plate.

[0008] Furthermore, both the first and third support plates have bearing holes at their centers, and a first bearing and a second bearing are respectively installed in the two bearing holes; it also includes a sleeve disposed on the outside of the nozzle, with the two ends of the sleeve respectively fitted into the inner rings of the first bearing and the second bearing; at least three through holes are opened on the periphery of the sleeve, and a sleeve is fixed to the outer wall surface of the sleeve located at the through holes, and a second telescopic module is installed on the inner bottom side of the sleeve, with a second abutment block abutting against the outer wall surface of the nozzle at the end of the second telescopic module.

[0009] Furthermore, a third driving structure for driving the sleeve to rotate is also provided; the third driving structure includes a mounting base fixed to the upper surface of the first support plate, a rotary motor fixed to the upper surface of the mounting base, a gear mounted on the output end of the rotary motor, a gear disk sleeved on the sleeve, and the gear disk and the gear meshing and transmitting power.

[0010] Furthermore, the bottom end of the nozzle is provided with a bent tube, and the end of the bent tube is detachably equipped with a nozzle. The bent tube is made of high-temperature resistant alloy material, and the angle between its axis and the nozzle axis is 100° to 145°.

[0011] Furthermore, both the first and second bearings are high-temperature resistant deep groove ball bearings; the inner walls of both the first and second guide sleeves are fitted with high-temperature resistant and wear-resistant bushings.

[0012] Furthermore, the telescopic cylinders of the first and second drive structures extend and retract alternately; the first telescopic modules of the first and second drive structures extend and retract alternately; both the first and second telescopic modules are telescopic cylinders, and the telescopic cylinders are telescopic motors or electric telescopic push rods; the control system is electrically connected to the telescopic cylinders, the first telescopic module, the second telescopic module, and the rotary motor, and is used to control the lifting and rotation of the nozzle.

[0013] A copper recovery and purification process includes: During the oxidation period, oxidizing gas is injected into the copper melt through the spray gun; During the reduction period, reducing agent gas is injected into the copper melt through the spray gun to carry out the reduction reaction.

[0014] Furthermore, the reduction period includes: First, insert the spray gun head into the copper slag to a depth of 7 / 10, spray for 15-25 minutes, and spray the reducing agent at a flow rate of 0.5-1 m³ / min. Every 5-10 minutes, the spray gun is raised 1 / 10 of its depth by the first drive structure, while the reducing agent spray flow rate is reduced by 0.04-0.06 m³ / min. When the spray gun is raised to 1 / 10 of the depth of the molten slag surface and the reducing agent flow rate drops to 40%-50% of the initial flow rate, continue spraying for 5-10 minutes to complete the gradient reduction.

[0015] 1. This invention, by setting a first drive structure driven by a telescopic cylinder, can precisely control the lifting and lowering movement of the nozzle along its axial direction, allowing for flexible adjustment of the nozzle's depth in the copper melt at different refining stages, thereby optimizing reaction efficiency; at the same time, the first drive structure and the second drive structure alternately operate to achieve relay-style lifting and lowering, avoiding the situation where, when using only the first drive structure, the nozzle slides downward under its own weight when the first telescopic module of the first drive structure releases its clamping action on the nozzle.

[0016] 2. The nozzle of the present invention passes through the first guide sleeve and the second guide sleeve, and a rotatable sleeve structure is set between the support plates and supported by bearings; this multi-point guiding and support design effectively enhances the stability of the spray gun during the lifting process and prevents the nozzle from shaking.

[0017] 3. The bent pipe and detachable nozzle at the bottom of the nozzle of the present invention, together with the third driving structure that can drive the nozzle to rotate, enable the reducing agent to be sprayed into the copper melt at a better angle and in a better manner, thereby improving the uniformity of the distribution of the reducing agent inside the melt. Attached Figure Description

[0018] Figure 1 A schematic diagram of the spray gun structure is provided for this invention; Figure 2 Provided for the present invention Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 Provided for the present invention Figure 1 The main view; Figure 4 Provided for the present invention Figure 3 Sectional view at point AA; Figure 5 Provided for the present invention Figure 4 Enlarged view of a section at point C; Figure 6 Provided for the present invention Figure 4 Enlarged view of section B in the middle.

[0019] Explanation of reference numerals in the attached figures: 1-Furnace top, 2-Nozzle, 3-Rotary motor, 5-First drive structure, 6-Sleeve, 11-First guide sleeve, 12-Fixing rod, 21-Bent pipe, 30-First support plate, 31-First bearing / mounting seat, 32-Gear, 40-Third support plate, 41-Second bearing, 50-Second support plate, 51-Telescopic cylinder, 52-Protruding edge, 53-Annular part, 54-First groove, 55-First telescopic module, 56-First abutment, 57-Second guide sleeve, 61-Gear disc / sleeve, 62-Second telescopic module, 63-Second abutment. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 6 As shown in the figure, a copper recovery reducing agent spray gun provided in this embodiment of the invention includes a spray pipe 2 penetrating through the furnace top 1, and a first guide sleeve 11 is provided on the furnace top 1; six fixing rods 12 are fixed on the top side of the furnace top 1 located around the first guide sleeve 11, and a first support plate 30, a third support plate 40, and a second support plate 50 are fixed on the six fixing rods 12 from bottom to top; the spray pipe 2 passes through the first support plate 30, the third support plate 40, and the second support plate 50.

[0022] To facilitate the control of the nozzle 2 to move up and down in the vertical direction when needed, the present invention provides a first driving structure 5 for driving the nozzle 2 to move in its axial direction on the upper surface of the second support plate 50, and a second driving structure 4 for driving the nozzle 2 to move in its axial direction on the upper surface of the third support plate 40; the second driving structure 4 and the first driving structure 5 have the same structure.

[0023] Specifically, such as Figure 5 The first drive structure 5 includes an annular component 53 on the outer periphery of the nozzle 2. Three first grooves 54 are provided on the inner wall of the annular component 53. A first telescopic module 55, which extends and retracts horizontally, is fixed inside the first grooves 54. A first abutment block 56, which abuts against the outer wall of the nozzle 2, is provided at the end of the first telescopic module 55. A protruding edge 52 is provided on the outer periphery of the annular component 53. At least one telescopic cylinder 51 is connected to the bottom side of the protruding edge 52. The telescopic cylinder 51 is fixed to the upper surface of the second support plate 50. A gap is provided between the annular component 53 and the nozzle 2. A second guide sleeve 57 is provided through the middle of the second support plate 50. The nozzle 2 passes through the first guide sleeve 11 and the second guide sleeve 57. Three guide telescopic rods are also connected to the bottom side of the protruding edge 52. The bottom ends of the guide telescopic rods are fixed to the upper surface of the third support plate 40 / second support plate 50. The guide telescopic rods enhance the stability of the annular component 53's movement and prevent the nozzle 2 from deviating.

[0024] In use, the telescopic cylinders 51 of the first drive structure 5 and the second drive structure 4 extend and retract alternately; the first telescopic modules 55 of the first drive structure 5 and the second drive structure 4 extend and retract alternately; both the first telescopic module 55 and the second telescopic module 62 are telescopic cylinders, and the telescopic cylinder 51 is a telescopic motor or an electric telescopic push rod; the control system is electrically connected to the telescopic cylinder 51, the first telescopic module 55, the second telescopic module 62 and the rotary motor 3, and is used to control the lifting and rotation of the nozzle 2.

[0025] The specific work process is as follows: In the initial state, the first telescopic module 55 of the second drive structure 4 clamps the nozzle 2, and the first telescopic module 55 of the second drive structure 4 is in the retracted state. First, control the first telescopic module 55 of the first drive structure 5 to clamp the nozzle 2, and at the same time control the first telescopic module 55 of the second drive structure 4 to release the clamp on the nozzle 2. Then control the first telescopic module 55 to extend, which will drive the nozzle 2 to rise. When the first telescopic module 55 of the first drive structure 5 extends, the first telescopic module 55 of the second drive structure 4 is simultaneously retracted. After the first telescopic module 55 of the first drive structure 5 has finished extending, the first telescopic module 55 of the second drive structure 4 is controlled to clamp the nozzle 2. When the first telescopic module 55 of the first drive structure 5 drops its clamping grip on the nozzle 2, the first telescopic module 55 of the second drive structure 4 is controlled to extend, which drives the nozzle 2 to rise. Repeat the above steps to control the nozzle 2 to rise.

[0026] The bottom end of the nozzle 2 is provided with a bent tube 21, and the end of the bent tube 21 is detachably installed with a nozzle. The bent tube 21 is made of high temperature resistant alloy material, and the angle between its axis and the axis of the nozzle 2 is 120°. In addition to 120°, the angle can also be set to 100°, 110°, 130°, or 145°.

[0027] To facilitate control of the nozzle 2's rotation during use, thereby driving the bent tube 21 to rotate inside the copper melt and improving the uniformity of reducing gas distribution within the copper melt, bearing holes are provided at the centers of the first support plate 30 and the third support plate 40. A first bearing 31 and a second bearing 41 are respectively installed in the two bearing holes. The system also includes a sleeve 6 located outside the nozzle 2, with both ends of the sleeve 6 fitted to the inner rings of the first bearing 31 and the second bearing 41, respectively. Figure 2 and 6At least three through holes are opened on the periphery of the sleeve 6. A sleeve 61 is fixed on the outer wall of the sleeve 6 at the through holes. A second telescopic module 62 is installed on the inner bottom side of the sleeve 61. A second abutment block 63 is provided at the end of the second telescopic module 62, which abuts against the outer wall of the nozzle 2. A third drive structure is also provided to drive the sleeve 6 to rotate. The third drive structure includes a mounting base 31 fixed on the upper surface of the first support plate 30. A rotary motor 3 is fixed on the upper surface of the mounting base 31. A gear 32 is installed at the output end of the rotary motor 3. A gear disk 61 is sleeved on the sleeve 6. The gear disk 61 and the gear 32 mesh and drive each other. When in use, the rotary motor 3 rotates, and the sleeve 6 is driven to rotate under the action of the meshing transmission of the gear disk 61 and the gear 32. When the sleeve 6 rotates, since the sleeve 6 is connected to the nozzle 2 as a whole through the telescopic module 62 and the second abutment block 63, the rotation of the sleeve 6 will drive the nozzle 2 to rotate.

[0028] Both the first bearing 31 and the second bearing 41 are high-temperature resistant deep groove ball bearings; the inner walls of the first guide sleeve 11 and the second guide sleeve 57 are both fitted with high-temperature resistant and wear-resistant bushings. The high-temperature resistant bearings and high-temperature resistant and wear-resistant bushings reduce high-temperature wear and ensure the long-term reliability of the equipment; the first abutment block 56 and the second abutment block 63 are both made of high-temperature resistant alloy blocks or special engineering ceramic blocks.

[0029] A copper recovery and purification process includes: During the oxidation period, oxidizing gas is injected into the molten copper through a spray gun; During the reduction period, reducing agent gas is injected into the molten copper through a spray gun to carry out the reduction reaction. Specifically, first insert the spray gun head into the copper slag to a depth of 7 / 10, spray for 20 minutes, and spray the reducing agent at a flow rate of 0.75 m³ / min; Every 7 minutes, the spray gun is raised 1 / 10 of its depth via the first drive structure 5, while the reducing agent spray flow rate is reduced by 0.05 m³ / min. When the spray gun is raised to 1 / 10 of the depth of the molten slag surface, the reducing agent flow rate drops to 0.45 m³ / min. Continue spraying for 10 minutes to complete the gradient reduction.

[0030] By combining the lifting and lowering of the spray gun with flow gradient control, layered reduction is achieved; and the gradient reduction process reduces the waste of reducing agent, ensuring sufficient reaction by adjusting the depth and flow rate in stages.

[0031] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A copper recovery reducing agent spray gun, characterized in that, Includes a nozzle (2) that penetrates the furnace top (1), and a first guide sleeve (11) is provided on the furnace top (1). A number of fixing rods (12) are fixed on the top side of the furnace top (1) located around the first guide sleeve (11). A first support plate (30) and a second support plate (50) are fixed on the fixing rods (12) from bottom to top. The top of the nozzle (2) passes through the first support plate (30) and the second support plate (50). The upper surface of the second support plate (50) is provided with a first drive structure (5) that drives the nozzle (2) to move along its axial direction; The first drive structure (5) includes an annular part (53) on the outer periphery of the nozzle (2). The inner wall of the annular part (53) is provided with at least three first grooves (54). The first groove (54) is fixed with a first telescopic module (55) that can extend and retract in the horizontal direction. The end of the first telescopic module (55) is provided with a first abutment block (56) that abuts against the outer wall of the nozzle (2). The outer periphery of the annular part (53) is provided with a protruding edge (52), and the bottom side of the protruding edge (52) is connected to at least one telescopic cylinder (51), and the telescopic cylinder (51) is fixed to the upper surface of the second support plate (50). The annular component (53) and the nozzle (2) are spaced apart, and a second guide sleeve (57) is provided through the middle of the second support plate (50); the nozzle (2) passes through the first guide sleeve (11) and the second guide sleeve (57).

2. The copper recovery reducing agent spray gun as described in claim 1, characterized in that, A third support plate (40) is also fixed on the fixing rod (12) located between the first support plate (30) and the second support plate (50). The upper surface of the third support plate (40) is provided with a second driving structure (4) that drives the nozzle (2) to move along its axial direction. The second driving structure (4) and the first driving structure (5) have the same structure.

3. The copper recovery reducing agent spray gun as described in claim 2, characterized in that, The bottom side of the protruding edge (52) is also connected to at least one guide telescopic rod, the bottom end of which is fixed to the upper surface of the third support plate (40) / second support plate (50).

4. The copper recovery reducing agent spray gun as described in claim 2, characterized in that, The first support plate (30) and the third support plate (40) are both provided with bearing holes at their centers, and the first bearing (31) and the second bearing (41) are respectively installed in the two bearing holes. It also includes a sleeve (6) located outside the nozzle (2), with the two ends of the sleeve (6) respectively fitted into the inner rings of the first bearing (31) and the second bearing (41); At least three through holes are opened on the periphery of the sleeve (6). A sleeve (61) is fixed on the outer wall of the sleeve (6) located at the through holes. A second telescopic module (62) is installed on the inner bottom side of the sleeve (61). A second abutment block (63) is provided at the end of the second telescopic module (62) against the outer wall of the nozzle (2).

5. The copper recovery reducing agent spray gun as described in claim 4, characterized in that, It is also equipped with a third drive structure for driving the sleeve (6) to rotate; The third drive structure includes a mounting base (31) fixed on the upper surface of the first support plate (30), a rotary motor (3) fixed on the upper surface of the mounting base (31), a gear (32) installed at the output end of the rotary motor (3), a gear disk (61) sleeved on the sleeve (6), and the gear disk (61) and the gear (32) meshing and driving.

6. The copper recovery reducing agent spray gun as described in claim 5, characterized in that, The bottom end of the nozzle (2) is provided with a bent tube (21), and the end of the bent tube (21) is detachably equipped with a nozzle. The bent tube (21) is made of high temperature resistant alloy material, and the angle between its axis and the axis of the nozzle (2) is 100° to 145°.

7. The copper recovery reducing agent spray gun as described in claim 4, characterized in that, The first bearing (31) and the second bearing (41) are both high-temperature resistant deep groove ball bearings; the inner walls of the first guide sleeve (11) and the second guide sleeve (57) are both fitted with high-temperature resistant and wear-resistant bushings.

8. The copper recovery reducing agent spray gun as described in claim 2, characterized in that, The telescopic cylinders (51) of the first drive structure (5) and the second drive structure (4) extend and retract alternately; the first telescopic modules (55) of the first drive structure (5) and the second drive structure (4) extend and retract alternately. Both the first telescopic module (55) and the second telescopic module (62) are telescopic cylinders, and the telescopic cylinder (51) is a telescopic motor or an electric telescopic push rod. The control system is electrically connected to the telescopic cylinder (51), the first telescopic module (55), the second telescopic module (62) and the rotary motor (3) to control the lifting and rotation of the nozzle (2).

9. A copper recovery and purification process, characterized in that, Using the copper recovery reducing agent spray gun as described in any one of claims 1-8, comprising: During the oxidation period, oxidizing gas is injected into the copper melt through the spray gun; During the reduction period, reducing agent gas is injected into the copper melt through the spray gun to carry out the reduction reaction.

10. The copper recovery and purification process as described in claim 9, characterized in that, The recovery period includes: First, insert the spray gun head into the copper slag to a depth of 7 / 10, spray for 15-25 minutes, and spray the reducing agent at a flow rate of 0.5-1 m³ / min. Every 5-10 minutes, the spray gun is raised 1 / 10 of its depth by the first drive structure (5), while the reducing agent spray flow rate is reduced by 0.04-0.06 m³ / min. When the spray gun is raised to 1 / 10 of the depth of the molten slag surface and the reducing agent flow rate drops to 40%-50% of the initial flow rate, continue spraying for 5-10 minutes to complete the gradient reduction.

Images