A copper smelting slag recovery and treatment device and treatment process

Abstract

The present invention relates to the technical field of copper smelting slag recovery and treatment, specifically to a copper smelting slag recovery and treatment device and treatment process, comprising a reduction mechanism, the reduction mechanism comprising a furnace body; a material chamber, the upper and lower ends of the material chamber are fixedly connected to the inner wall of the furnace body, used as a reaction container, and the reaction raw material is granular copper smelting slag; a heating element, arranged between the furnace body and the material chamber, for providing the heat required for the reaction; an air inlet pipe, for introducing hydrogen into the material chamber; an exhaust pipe, for discharging tail gas from the material chamber; a dispersion component, for dispersing the hydrogen entering the material chamber; a spoiler component, for changing the flow direction of hydrogen in the material chamber; and a retention component, for slowing down the rising speed of the tail gas. The copper smelting slag recovery and treatment device and treatment process reduce the spherical particles of copper smelting slag by hydrogen, and the product after the reaction has high cleanliness and is easy to handle, which reduces energy consumption and pollution to the environment.

Description

Technical Field

[0001] The present invention relates to the technical field of copper smelting slag recovery and treatment, and in particular to a copper smelting slag recovery and treatment device and a treatment process. Background Art

[0002] Copper smelting slag is the waste residue produced in the copper smelting process. The chemical composition of copper smelting slag is SiO230-40%, CaO 5-10%, MgO 1-5%, Al2O32-4%, in addition to a large amount of iron 27-35% and a small amount of zinc 2-3%. At present, the metals in copper smelting waste slag can be replaced by reducing gas, so that the resources can be reused for the second time.

[0003] In the prior art, natural gas, a mixed gas rich in coal gas or SO2 gas is generally used as a reducing gas to perform a reduction treatment on the molten copper smelting slag.

[0004] For example, a copper smelting hot slag iron extraction process and device disclosed in publication number CN101705360B automatically flows the copper smelting hot slag into the second molten pool, i.e., the iron reduction zone, and coal, quicklime, and oxygen-enriched air are sprayed into the second molten pool or the iron reduction zone by side blowing or top blowing to achieve reduction and iron extraction. A method for recovering copper smelting slag by enhanced separation using SO2 disclosed in publication number CN109082534B is to pass high-concentration SO2 gas into a corrosion-resistant pipe arranged at the bottom of the copper smelting slag slurry, the pipe is provided with micropores, and the pipe is spirally coiled into a single-layer disc shape, the gas enters the copper smelting slag slurry through the micropores, and the larger bubbles are sheared into smaller bubbles through the agitator arranged in the copper smelting slag slurry, and the SO2 forms sulfuric acid in the copper smelting slag slurry, and the valuable metals in the copper smelting slag slurry are leached out. Publication No. CN102952952B discloses a method for directly reducing and recovering copper and iron from smelting copper slag, the steps of which are: transferring the high-temperature molten copper slag to a high-temperature reduction furnace via a tundish, and injecting natural gas for molten reduction.

[0005] The above-mentioned treatment method will result in the final reaction product containing a large amount of carbon or sulfur-containing gas, which will pollute the environment. In addition, copper smelting slag participates in the reaction in a molten state, which not only consumes a lot of heat energy, but also makes it difficult to separate and process the solid product after the reaction, which increases the subsequent processing cost and is not conducive to energy conservation and emission reduction. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a copper smelting slag recovery and treatment device and treatment process, which solves the problem that the existing copper smelting slag treatment method produces a large amount of polluting gas and has excessive energy consumption.

[0007] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present invention provides a copper smelting slag recovery and treatment device, comprising:

[0008] Furnace body;

[0009] A material chamber, wherein both upper and lower ends of the material chamber are fixedly connected to the inner wall of the furnace body and used as a reaction container, and the reaction raw material is granular copper smelting slag;

[0010] The heating element is arranged between the furnace body and the material chamber to provide the heat required for the reaction;

[0011] An air inlet pipe is used to introduce hydrogen into the material chamber;

[0012] Exhaust pipe, used to discharge exhaust gas from the material chamber;

[0013] A dispersion component, used to disperse the hydrogen entering the material chamber;

[0014] A spoiler component is used to change the flow direction of hydrogen in the material chamber;

[0015] Retention components are used to slow down the rising speed of exhaust gas;

[0016] The spoiler component includes a shaft rod rotatably connected to the inner wall of the furnace body, and a plurality of partition plates are distributed in an array on the outer peripheral wall of the shaft rod, one side of the partition plate is fixedly connected to the outer peripheral wall of the shaft rod, and the other side is S-shaped, and the top view of the partition plate is triangular, and the bottom end of the partition plate is in contact with the top of the bottom plate, and a plurality of T-shaped plates are fixedly connected to the outer peripheral wall of the shaft rod, the T-shaped plate is hollow inside and has an air outlet at the bottom, and a guide cavity is provided inside the shaft rod, and the bottom end of the guide cavity is connected to a guide pipe, one end of the guide pipe is connected to the air inlet pipe, and the guide cavity is connected to the inside of the T-shaped plate.

[0017] As a preferred technical solution, the dispersing component includes a base plate fixedly connected to the inner wall of the material chamber, the base plate is evenly distributed with through holes, and an air intake cavity is provided between the base plate and the furnace body, the air intake cavity is connected with a pressurizing pipe, and one end of the pressurizing pipe is connected to the air intake pipe.

[0018] As a preferred technical solution, a plurality of fan blades are distributed in a circular array on the outer peripheral wall of the shaft, and the fan blades are located in the air inlet cavity. The fan blades can be driven to rotate by the wind force blown out by the pressurized pipe.

[0019] As a preferred technical solution, the retention component includes a top plate fixedly connected to the inner peripheral wall of the material chamber, the top plate is evenly distributed with through holes, and the bottom of the top plate is in contact with the top of the partition plate;

[0020] One end of the exhaust pipe passes through the material chamber and is communicated with the top of the top plate.

[0021] As a preferred technical solution, it also includes a feeding mechanism;

[0022] The feeding mechanism comprises a material distribution shell, the bottom of the material distribution shell is connected to a plurality of hoppers, the bottom of the hopper is connected to a feeding pipe, the bottom of the feeding pipe passes through the top plate and is connected to the inside of the material chamber;

[0023] A rotating rod is rotatably connected to the inner wall of the material dividing shell, a material shifting plate is fixedly connected to the top of the rotating rod, and the bottom end of the rotating rod is fixedly connected to the top of the shaft rod.

[0024] As a preferred technical solution, it also includes a material discharge mechanism, which includes a cooling hopper arranged at the bottom end of the furnace body, and a material discharge pipe is connected to the top of the cooling hopper. The top end of the material discharge pipe passes through the bottom plate and is connected to the inside of the material chamber.

[0025] A second aspect of an embodiment of the present invention provides a copper smelting slag recovery and treatment process, comprising the following steps:

[0026] Step 1: Granulation: mixing copper smelting slag powder with an adhesive to form spherical particles with a certain density;

[0027] Step 2: conveying and feeding, conveying the spherical particles into the feeding mechanism, and the particles enter the material chamber through the feeding mechanism;

[0028] Step 3, hydrogen reduction, hydrogen is introduced into the material chamber, heated to 900°C-950°C, and the spherical particles are reduced. During this process, the hydrogen is continuously dispersed by the dispersion component and then contacts the spherical particles, and the position of the spherical particles and the flow direction of the hydrogen are changed by the spoiler component, and the residence time of the hydrogen in the upper layer of the reaction area is extended by the retention component to allow the reaction to proceed fully;

[0029] Step 4: Hydrogen recovery: the tail gas of the reaction is cooled by a heat exchanger, and the hydrogen in it is separated by a separator and then refluxed into the material chamber.

[0030] By means of the above technical scheme, the present invention provides a copper smelting slag recovery and treatment device and treatment process. It has at least the following beneficial effects: the copper smelting slag recovery and treatment device and treatment process reduce the spherical particles of copper smelting slag by hydrogen, and the product after the reaction is highly clean and easy to handle, which reduces energy consumption and pollution to the environment. By setting a dispersion component, the hydrogen entering the material chamber can be dispersed, so that the hydrogen enters the reaction area more evenly. By setting a turbulent component, the original rising path of the hydrogen can be broken up, so that the gas rises irregularly, so that it flows evenly and randomly in the copper slag particles, and the reaction degree of the middle-layer particles is improved. By setting a retention component, the residence time of hydrogen in the upper layer of the material chamber can be extended, so that the upper-layer particles can be fully reacted, thereby improving the utilization rate and reaction efficiency of hydrogen, reducing energy consumption, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0032] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of a heat exchanger and a separator in an embodiment of the present invention;

[0034] Figure 3 is a schematic diagram of a heating element in an embodiment of the present invention;

[0035] Figure 4 Schematic diagram of a feeding mechanism in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the bottom structure of a T-shaped plate in an embodiment of the present invention;

[0037] Figure 6 is a cross-sectional view of the shaft rod and the T-shaped plate in an embodiment of the present invention;

[0038] Figure 7 Schematic diagram of a feeding mechanism in an embodiment of the present invention;

[0039] Figure 8 Schematic diagram of gas concentration distribution in the material chamber in an embodiment of the present invention.

[0040] In the figure: 1. granulator; 2. conveyor; 3. feeding mechanism; 31. material dividing shell; 32. hopper; 33. feeding pipe; 34. rotating rod; 35. material shifting plate; 4. reduction mechanism; 41. furnace body; 42. material chamber; 43. heating element; 44. air inlet pipe; 45. exhaust pipe; 46. dispersion component; 461. bottom plate; 462. air inlet cavity; 463. pressurizing pipe; 47. spoiler component; 471. shaft; 472. partition plate; 473. fan blade; 474. T-shaped plate; 475. air outlet; 476. guide cavity; 477. guide pipe; 48. retention component; 481. top plate; 5. unloading mechanism; 51. cooling hopper; 52. unloading pipe; 53. discharge pipe; 6. heat exchanger; 7. separator; 8. hydrogen source. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1

[0043] See also Figure 1-Figure 3 An embodiment of the present invention provides a copper smelting slag recovery and processing device, which at least includes a reduction furnace, which is a vertical furnace and serves as a reaction container to recover metal elements in the copper smelting slag, wherein the reducing gas is hydrogen.

[0044] In the prior art, natural gas, mixed gas rich in coal gas or SO2 gas is used as reducing gas, and the exhaust gas contains a large amount of carbon-containing or sulfur-containing gas, which is highly polluting. In addition, the prior art requires the copper smelting slag to be converted into a molten state before reacting, which requires high temperature, and the separation and treatment of the final product of the reaction is troublesome and the cost is too high.

[0045] Therefore, the first embodiment also includes:

[0046] A hydrogen source 8 is used to provide hydrogen as a reducing gas to replace the metal in the copper smelting slag, and the byproduct is water, so as to achieve clean production;

[0047] Granulator 1 is used to make copper smelting slag powder into granules, so that it maintains a certain weight and does not rise with hydrogen. The waste slag is directly reduced in granules and is easy to discharge and handle after the reaction;

[0048] Conveyor 2, used to convey copper slag particles into the reduction furnace to achieve continuous feeding;

[0049] Heat exchanger 6, used to preheat and cool the gas entering and exiting the reduction furnace, increase the temperature rise rate of the entering gas, reduce heat energy consumption, and increase the cooling rate of the exhaust gas, so as to facilitate and quickly separate the water vapor in the exhaust gas;

[0050] The separator 7 is used to separate the hydrogen and water vapor in the tail gas, so as to facilitate the recovery of the hydrogen that has not been fully reacted and reduce the loss.

[0051] Specifically, the reduction furnace includes a feeding mechanism 3, a reduction mechanism 4 and a unloading mechanism 5 which are arranged in sequence from top to bottom.

[0052] The reduction mechanism 4 includes a furnace body 41, and a material chamber 42 is coaxially arranged inside the furnace body 41. The material chamber 42 is cylindrical and is used to hold copper slag particles and serve as a reaction container. The top of the material chamber 42 is fixedly connected to the inner top wall of the furnace body 41, and the bottom is fixedly connected to the inner bottom wall of the furnace body 41. There is an annular heating cavity between the outer peripheral wall of the material chamber 42 and the inner peripheral wall of the furnace body 41. A heating element 43 is arranged in the heating cavity. The heating element 43 is a resistance wire and is used to provide the material chamber 42 with heat energy required for the reaction.

[0053] The material chamber 42 is connected with an air inlet pipe 44 and an exhaust pipe 45, wherein the air inlet pipe 44 is used to introduce hydrogen into the material chamber 42, and the exhaust pipe 45 is used to discharge the tail gas generated by the reduction reaction. The air inlet pipe 44 is located above the exhaust pipe 45, wherein the air inlet pipe 44 can be inserted into the material chamber 42 from the bottom end of the furnace body 41 or the side near the bottom end, and the exhaust pipe 45 can be inserted into the material chamber 42 from the top end of the furnace body 41 or the side near the top end.

[0054] Embodiment 2

[0055] See also Figure 3-Figure 8 Based on the first embodiment, this embodiment provides a copper smelting slag recovery and processing device.

[0056] After the hydrogen enters the material chamber 42 from the air inlet pipe 44, it will continue to rise. Affected by the high temperature of the material chamber 42, its rising speed is further accelerated. In this process:

[0057] First, there are many gaps between copper slag particles, and hydrogen passes through the gaps, causing part of the hydrogen to be discharged directly without reaction, resulting in low hydrogen utilization rate;

[0058] Secondly, when hydrogen is first introduced, the temperature is low and the rising speed is slow. After the temperature is increased, the rising speed increases and finally reaches a stable state, resulting in a high hydrogen concentration in the lower layer of the material chamber 42. In addition, when hydrogen is first discharged from the intake pipe 44, it cannot be dispersed instantly, but is concentrated at the inlet pipe 44 port. In the rising process, as the number of gaps passed through increases, the degree of dispersion increases, and finally reaches a relatively uniform state, resulting in a relatively concentrated hydrogen in the lower layer of the material chamber 42, with a moderate concentration and good dispersion compared to the upper hydrogen. At the top layer, due to the light weight of hydrogen, there is a trend of continuous rise, and the outlet of the exhaust pipe 45 is small, the rising gas cannot be discharged from the exhaust pipe 45 evenly, but will be retained to a certain extent, resulting in an increase in the concentration of the upper layer of the material chamber 42. Even so, most of the upper layer gas is a by-product of the reaction, and the contact time between the unreacted hydrogen and the upper layer hydrogen is short, resulting in a low degree of conversion.

[0059] Therefore, if Figure 8 As shown, we divide the interior of the material chamber 42 into three layers: upper, middle and lower;

[0060] Thirdly, from the perspective of reduction reaction, the chemical formula of hydrogen reduction of copper smelting slag is H2+MO→M+H2O, wherein M represents metal, the molar amount of hydrogen consumed is the same as the molar amount of water vapor generated, and the water vapor generated by the reaction will rise along with the hydrogen under the action of high temperature, and finally be discharged as exhaust gas, so that the change of gas concentration in the material chamber 42 still conforms to the above law.

[0061] The uneven distribution of hydrogen makes it impossible for copper smelting slag to fully and evenly undergo reduction reaction, resulting in high raw material consumption and low output, making the input and output not proportional. In addition, when the tail gas is discharged, a large amount of reaction heat will be taken away, and the unreacted hydrogen will be directly discharged at high temperature, which will greatly increase energy consumption and increase production costs.

[0062] In order to improve the utilization rate of hydrogen in the material chamber 42, the reduction mechanism 4 also includes:

[0063] The dispersion component 46 is used to improve the dispersion of the incoming air so that the hydrogen in the lower layer of the material chamber 42 is more evenly distributed;

[0064] The spoiler 47 is used to break up the original rising path of the gas, so that the gas rises irregularly, thereby flowing evenly and randomly in the copper slag particles, thereby improving the reaction degree of the middle layer particles;

[0065] The retention component 48 is used to slow down the rising speed of the exhaust gas and further retain the gas in the upper layer so that the particles in the upper layer can fully react.

[0066] Combination Figure 3 and Figure 4 As shown, the dispersion component 46 includes a bottom plate 461 fixedly connected to the inner peripheral wall of the material chamber 42, and there is a certain distance between the bottom plate 461 and the inner bottom wall of the furnace body 41, so that an air inlet cavity 462 is formed between the bottom plate 461, the furnace body 41 and the material chamber 42. A pressurizing pipe 463 is connected in the air inlet cavity 462, and one end of the pressurizing pipe 463 passes through the material chamber 42 and the furnace body 41 in sequence and is connected to the air inlet pipe 44, so that hydrogen is supplied into the air inlet cavity 462. There are multiple through holes evenly distributed on the bottom plate 461. After the hydrogen diffuses in the air inlet cavity 462, it enters the material chamber 42 through the evenly distributed through holes, thereby reducing the local concentration of hydrogen and allowing the hydrogen to rise in a more dispersed manner.

[0067] Combination Figure 3-Figure 7 As shown, the spoiler component 47 includes a shaft 471 coaxially arranged with the material chamber 42, and the upper and lower ends of the shaft 471 are both rotatably connected to the inner wall of the furnace body 41. A plurality of partition plates 472 are arranged in an array on the outer peripheral wall of the shaft 471. The partition plates 472 have a certain curvature, one side of which is fixedly connected to the outer peripheral wall of the shaft 471, and the other side is a free end, which is S-shaped. There is a certain angle between the upper and lower surfaces of the partition plate 472. When viewed from above or above, the partition plate 472 is triangular. The plurality of partition plates 472 divide the internal space of the material chamber 42 into a plurality of areas. Through the special shape design, when the copper smelting slag enters the material chamber 42, it can drive the partition plates 472 to rotate, thereby making the copper smelting slag more evenly distributed in the material chamber 42.

[0068] A plurality of blades 473 are arranged in a circular array on the outer peripheral wall of the shaft 471. The blades 473 are located in the air inlet cavity 462. The blades 473 can be driven to rotate by the wind blown out by the pressurized pipe 463, so that during the reduction stage, the partition plate 472 can keep rotating, thereby driving the angle of the copper smelting slag to change continuously, so that the copper smelting slag in different areas can be evenly contacted with hydrogen. In addition, the rotation of the blades 473 can buffer the pressure of the intake air and make the gas more dispersed.

[0069] In order to increase the hydrogen concentration in the middle layer of the material chamber 42, a plurality of T-shaped plates 474 are fixedly connected to the outer peripheral wall of the shaft 471. The T-shaped plates 474 are hollow inside and have an air outlet 475 at the bottom. The first end and the second end of the T-shaped plates 474 are respectively fixed at the middle position of two adjacent partition plates 472, and the third end of the T-shaped plates 474 is provided with an opening and connected to the shaft 471. A guide cavity 476 is provided inside the shaft 471, and the guide cavity 476 is connected to the inside of the T-shaped plates 474. A guide pipe 477 is connected to the bottom end of the guide cavity 476, and one end of the guide pipe 477 passes through the material chamber 42 and the furnace body 41 in sequence and is connected to the air inlet pipe 44, so that hydrogen is passed into the T-shaped plates 474 through the guide cavity 476 and blown out from the bottom of the T-shaped plates 474. The blown hydrogen turbulents the original rising gas, and then rises together with the original gas, so that the hydrogen concentration in the middle layer of the material chamber 42 is increased. Compared with the original method of introducing air from one direction, this embodiment divides the same amount of gas into two parts and introduces air from different directions, so that the gas concentration distribution is more uniform.

[0070] In addition, the retention component 48 includes a top plate 481 fixedly connected to the inner wall of the material chamber 42, and through holes are evenly distributed on the top plate 481. One end of the exhaust pipe 45 passes through the material chamber 42 and is connected to the space above the top plate 481. The obstruction of the top plate 481 can buffer the rising speed of the gas, retain most of the gas in the reaction area, and extend the reaction time of the upper layer of the material chamber 42.

[0071] The bottom end of the partition plate 472 is in contact with the top end of the bottom plate 461, so that the partition plate 472 can drive the copper smelting slag in the area to rotate when it rotates to avoid omission. The top end of the partition plate 472 is in contact with the bottom end of the top plate 481 to ensure that when the partition plate 472 rotates, the gas in the reaction area can be disturbed by it. The gas below the top plate 481 is affected by the kinetic energy provided by the partition plate 472, which alleviates the upward movement trend of the gas and allows the hydrogen in the gas to react more fully with the upper material.

[0072] Adapting to the reduction mechanism 4, the feeding mechanism 3 includes a material distribution shell 31 arranged at the top of the furnace body 41, and the bottom of the material distribution shell 31 is connected to multiple hoppers 32, and the bottom end of the hopper 32 is connected to a feeding pipe 33. The bottom end of the feeding pipe 33 passes through the top plate 481 and is connected to the inside of the material chamber 42 to add copper slag particles into the reduction area. As a preferred embodiment, the number of feeding pipes 33 is the same as the number of partition plates 472, and each feeding pipe 33 corresponds to a reaction area, so that when feeding, multiple partition plates 472 can contact the copper smelting slag, and the copper smelting slag can provide sufficient and uniform force to rotate the partition plates 472. A rotating rod 34 is rotatably connected to the inner wall of the material distribution shell 31, and a material removal plate 35 is fixedly connected to the top of the rotating rod 34. The bottom end of the rotating rod 34 is fixedly connected to the top of the shaft rod 471. When the shaft rod 471 rotates, the rotating rod 34 synchronously drives the material removal plate 35 to rotate, so that the copper slag particles in the material distribution shell 31 can enter the hopper 32.

[0073] The unloading mechanism 5 includes a cooling hopper 51 arranged at the bottom end of the furnace body 41, and a unloading pipe 52 is connected to the top of the cooling hopper 51. The top end of the unloading pipe 52 passes through the bottom plate 461 and is connected to the inside of the material chamber 42. The bottom end of the cooling hopper 51 is connected to a discharge pipe 53 to discharge the copper slag particles out of the device.

[0074] Embodiment 3

[0075] The embodiment of the present invention provides a copper smelting slag recovery and treatment process, comprising the following steps:

[0076] Step 1: Granulation: Mix the copper smelting slag powder with an adhesive to make spherical particles with a certain density to prevent the copper slag from floating up with the hydrogen.

[0077] Step 2: conveying: after screening, the qualified spherical particles are conveyed to the feeding mechanism 3 through the conveyor 2.

[0078] Step 3: Feeding: copper slag particles enter the material chamber 42 through multiple feeding pipes 33 , and during the feeding process, gravity drives the partition plates 472 and the shaft 471 to rotate, so that the copper slag particles are evenly distributed between the partition plates 472 .

[0079] Step 4: Hydrogen reduction: hydrogen is introduced into the material chamber 42 and heated to 900° C.-950° C. by the heating element 43 to reduce the spherical particles;

[0080] In this process, the hydrogen gas input through the air inlet pipe 44 enters the pressurizing pipe 463 and the guide pipe 477 respectively, and the hydrogen gas in the pressurizing pipe 463 is discharged in the air inlet chamber 462 and impacts the fan blade 473, so that the fan blade 473 rotates, and then drives the shaft 471 and the partition plate 472 to rotate, and the partition plate 472 drives the copper slag particles to rotate, and disturbs the hydrogen gas in the material chamber 42, destroying the original hydrogen rising path, so that the hydrogen gas flows irregularly between the materials, and the materials and the hydrogen gas contact more evenly; in addition, the hydrogen gas diffuses in the air inlet chamber 462 and then passes through the through hole on the bottom plate 461 into the reaction area, so that the hydrogen gas is dispersed more evenly;

[0081] The hydrogen in the guide tube 477 enters into the multiple T-shaped plates 474 through the guide cavity 476 inside the shaft 471, and is blown downward through the gas outlet 475 opened at the bottom of the T-shaped plate 474, thereby counteracting the originally rising gas, slowing down the rising speed of the hydrogen, increasing the hydrogen concentration in the middle layer of the material chamber 42, and allowing the middle layer material to fully react;

[0082] After the gas rises to the upper layer of the material chamber 42, it is blocked by the top plate 481, so that its rising speed is buffered, the contact time between the hydrogen and the upper layer material is prolonged, and the reactivity of the upper layer material is improved.

[0083] Step 5, hydrogen recovery. After the reaction tail gas is discharged through the exhaust pipe 45, it exchanges heat with the intake air through the heat exchanger 6, and the temperature drops. It then enters the separator 7, separates the hydrogen in the tail gas and recovers it to the hydrogen source 8, and finally flows back to the reduction furnace for reuse.

[0084] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A copper smelting slag recovery and treatment device, characterized in that: include: Furnace body (41); A material chamber (42), wherein both upper and lower ends of the material chamber (42) are fixedly connected to the inner wall of the furnace body (41), and is used as a reaction container, wherein the reaction raw material is granular copper smelting slag; A heating element (43) is disposed between the furnace body (41) and the material chamber (42) and is used to provide heat required for the reaction; An air inlet pipe (44) for introducing hydrogen into the material chamber (42); An exhaust pipe (45) for discharging exhaust gas from the material chamber (42); A dispersion component (46) for dispersing the hydrogen entering the material chamber (42); A flow-disturbing component (47) for changing the flow direction of hydrogen in the material chamber (42); A retention component (48) for slowing down the rising speed of the exhaust gas; The spoiler component (47) comprises a shaft (471) rotatably connected to the inner wall of the furnace body (41); a plurality of partition plates (472) are arranged in an array on the outer peripheral wall of the shaft (471); one side of the partition plate (472) is fixedly connected to the outer peripheral wall of the shaft (471); the other side is S-shaped; and the top view of the partition plate (472) is triangular; the bottom end of the partition plate (472) contacts the top end of the bottom plate (461); A plurality of T-shaped plates (474) are fixedly connected to the outer peripheral wall of the shaft rod (471); the interior of the T-shaped plates (474) is hollow and an air outlet (475) is provided at the bottom; a flow guide cavity (476) is provided inside the shaft rod (471); the bottom end of the flow guide cavity (476) is connected to a flow guide pipe (477); one end of the flow guide pipe (477) is connected to the air inlet pipe (44); and the flow guide cavity (476) is connected to the interior of the T-shaped plates (474).

2. The copper smelting slag recovery and treatment device according to claim 1, characterized in that: The dispersion component (46) comprises a bottom plate (461) fixedly connected to the inner wall of the material chamber (42), the bottom plate (461) being evenly distributed with through holes, and an air intake cavity (462) being provided between the bottom plate (461) and the furnace body (41), the air intake cavity (462) being connected to a pressurizing pipe (463), and one end of the pressurizing pipe (463) being connected to the air intake pipe (44).

3. The copper smelting slag recovery and treatment device according to claim 1, characterized in that: A plurality of fan blades (473) are distributed in a circular array on the outer peripheral wall of the shaft (471); the fan blades (473) are located in the air inlet cavity (462); and the fan blades (473) can be driven to rotate by the wind force blown out by the pressurized pipe (463).

4. The copper smelting slag recovery and treatment device according to any one of claims 1 to 3, characterized in that: The retention component (48) includes a top plate (481) fixedly connected to the inner peripheral wall of the material chamber (42), the top plate (481) is evenly distributed with through holes, and the bottom of the top plate (481) is in contact with the top of the partition plate (472); One end of the exhaust pipe (45) passes through the material chamber (42) and is connected to the top of the top plate (481).

5. The copper smelting slag recovery and treatment device according to claim 4, characterized in that: Also includes a feeding mechanism (3); The feeding mechanism (3) comprises a material distribution shell (31), the bottom of the material distribution shell (31) is connected to a plurality of hoppers (32), the bottom end of the hopper (32) is connected to a feeding pipe (33), the bottom end of the feeding pipe (33) passes through the top plate (481) and is connected to the inside of the material chamber (42); A rotating rod (34) is rotatably connected to the inner wall of the material dividing shell (31), a material shifting plate (35) is fixedly connected to the top end of the rotating rod (34), and a bottom end of the rotating rod (34) is fixedly connected to the top end of the shaft rod (471).

6. The copper smelting slag recovery and treatment device according to claim 4, characterized in that: The furnace also includes a material discharge mechanism (5), which includes a cooling hopper (51) arranged at the bottom end of the furnace body (41), a material discharge pipe (52) connected to the top of the cooling hopper (51), and a top end of the material discharge pipe (52) passing through the bottom plate (461) and communicating with the inside of the material chamber (42).

7. A copper smelting slag recovery process, used for the copper smelting slag recovery device according to claim 5, characterized in that: The following steps are involved: Step 1: Granulation: mixing copper smelting slag powder with an adhesive to form spherical particles with a certain density; Step 2: conveying and feeding, conveying the spherical particles into the feeding mechanism (3), and the particles enter the material chamber (42) through the feeding mechanism (3); Step 3, hydrogen reduction, hydrogen is introduced into the material chamber (42), heated to 900°C-950°C, and the spherical particles are reduced. During this process, the hydrogen is continuously dispersed by the dispersion component (46) and then contacts the spherical particles. The position of the spherical particles and the flow direction of the hydrogen are changed by the spoiler component (47), and the residence time of the hydrogen in the upper layer of the reaction area is prolonged by the retention component (48), so that the reaction is fully carried out; Step 4: Hydrogen recovery: the tail gas of the reaction is cooled by a heat exchanger (6), and the hydrogen therein is separated by a separator (7) and then refluxed into the material chamber (42).

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