A smelting device and its smelting process for the preparation of rare and precious metals

Abstract

The present invention discloses a smelting device and a smelting process for preparing rare and precious metals in the technical field of metal smelting, including a smelting furnace, a furnace cover covering the top of the smelting furnace, and a consumable electrode inserted through the furnace cover. It is characterized in that: a flue gas treatment assembly, the flue gas treatment assembly includes a gas guiding assembly communicated with the furnace cover and a flue gas treatment chamber internally storing a flue gas treatment liquid and communicated with the gas guiding assembly; during the process of the rotating jet head of the present invention discharging the flue gas into the flue gas treatment liquid, on the one hand, the flue gas can be uniformly injected into multiple positions in the flue gas treatment liquid, which is beneficial to increasing the uniform contact between the flue gas and the flue gas treatment liquid. On the other hand, while injecting gas, the rotating jet head will stir the flue gas treatment liquid, so that the flue gas treatment liquid continuously flows and mixes with the flue gas, which is beneficial to the full mixing of the flue gas and the flue gas treatment liquid and is also beneficial to breaking the gas film, so that the flue gas treatment liquid can contact the flue gas after breaking through the gas film.

Description

Technical Field

[0001] The present invention relates to the technical field of metal smelting, and particularly to a smelting device and a smelting process for preparing rare and precious metals. Background Art

[0002] An electroslag remelting furnace is an electric furnace device that uses the method of isolating air by molten slag to refine certain steels or alloys.

[0003] In terms of the heating principle, an electroslag remelting furnace is a resistance melting furnace. In the electroslag remelting process, the lower end of the electrode is immersed in the molten slag. When an alternating current passes through the high-resistance slag pool, a large amount of heat is generated. It melts the end of the electrode immersed in the molten slag, and the molten metal droplets generated by melting pass through the slag pool and drip into the metal molten pool, and then are cooled by the water-cooled crystallizer and solidified into ingots. During this process, the molten metal droplets are in full contact with the high-temperature and high-alkalinity molten slag, resulting in strong metallurgical chemical reactions, and the metal is refined.

[0004] Some invention patents in the technical field of metal smelting are disclosed in the prior art. Among them, the invention patent with the publication number CN202880900U discloses a closed-loop water mist recovery device for the flue gas of a boron carbide smelting furnace, including a smelting furnace, a smoking hood and a flue. Its characteristics are: a hydrolysis tank is added to the end of the said flue, an atomizing spray head and a discharge port are arranged on the upper part of the hydrolysis tank, the outlet of the hydrolysis tank is connected to the feed port of a filter press, a liquid receiving tank is arranged under the filter press, the liquid receiving tank is connected to the inlet of a crystallization tank through a pipeline, and the discharge port of the crystallization tank is connected to a dehydrator through a pipeline.

[0005] In the process of treating flue gas with a flue gas treatment liquid in the prior art, the method of injecting the flue gas into the flue gas treatment liquid is mostly fixed exhaust, which is not conducive to the uniform mixing of the flue gas and the flue gas treatment liquid, and it is easy to generate a gas film during the gas flow, which is not conducive to the full contact between the treatment liquid and the gas.

[0006] Based on this, the present invention designs a smelting device and a smelting process for preparing rare and precious metals to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a smelting device and a smelting process for preparing rare and precious metals to solve the problem that in the process of treating flue gas with a flue gas treatment liquid in the above-mentioned background art, the method of injecting the flue gas into the flue gas treatment liquid is mostly fixed exhaust, which is not conducive to the uniform mixing of the flue gas and the flue gas treatment liquid, and it is easy to generate a gas film during the gas flow, which is not conducive to the full contact between the treatment liquid and the gas.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] In a first aspect, a smelting device for preparing rare and precious metals includes a smelting furnace, a furnace cover covering the top of the smelting furnace, and a consumable electrode inserted through the furnace cover. It is characterized in that it further includes:

[0010] A flue gas treatment assembly, the flue gas treatment assembly includes a gas guiding assembly communicated with the furnace cover and a flue gas treatment chamber internally storing a flue gas treatment liquid, and the flue gas treatment liquid in the flue gas treatment chamber is used for treating the passing gas;

[0011] A spraying assembly, the spraying assembly includes a plurality of annular nozzles with different inner ring diameters, and the annular nozzles are used for spraying the flue gas treatment liquid to form a plurality of annular water curtains;

[0012] An air injection assembly, the air injection assembly includes a rotating air jet head communicated with a gas guiding pipe component and a drainage assembly. The rotating air jet head is used for rotatingly injecting gas into the flue gas treatment liquid to stir the flue gas treatment liquid while injecting the flue gas, which is beneficial to increasing the opportunity of water and gas to mix and contact. The drainage assembly is used for converging the flue gas passing through the flue gas treatment liquid and then draining it into the innermost annular water curtain with the smallest inner ring diameter among the plurality of annular water curtains, so that the flue gas is discharged after passing through the plurality of water curtains, and the flue gas contacts the water curtain during the process of passing through the water curtain.

[0013] It should be understood that in the first stage of treating the flue gas, the gas in the smelting furnace is injected into the flue gas treatment chamber through the gas guiding assembly and discharged into the flue gas treatment liquid through the rotating air jet head. During the process of the rotating air jet head discharging the flue gas into the flue gas treatment liquid, on the one hand, the flue gas can be evenly injected into multiple positions in the flue gas treatment liquid, which is beneficial to increasing the uniform contact between the flue gas and the flue gas treatment liquid. On the other hand, while injecting the gas, the rotating air jet head will stir the flue gas treatment liquid, so that the flue gas treatment liquid continuously flows and mixes with the flue gas, which is beneficial to the full mixing of the flue gas and the flue gas treatment liquid and is also beneficial to breaking the gas film, so that the flue gas treatment liquid can contact the flue gas after breaking through the gas film;

[0014] In the second stage of treating the flue gas, the flue gas passing through the flue gas treatment liquid will converge above the liquid level in the flue gas treatment chamber. The flue gas treatment liquid is sprayed through the spraying assembly to form a plurality of annular water curtains. The flue gas is converged into the inner part of the annular water curtain through the drainage assembly, so that the flue gas needs to break through the plurality of water curtains before it can be discharged, further treating the flue gas. And under the impact of the falling water curtain, it is easy to impact the flue gas and break the gas film, so that the impacted flue gas will flow between adjacent water curtains. There will be floating water mist between the water curtains, forming a plurality of treatment spaces, which is beneficial to the further contact between the flue gas and the flue gas treatment liquid and is beneficial to improving the treatment effect.

[0015] As an optional technical solution of the present invention, the gas guiding assembly includes:

[0016] The first air duct is fixedly communicated with the top of the furnace cover;

[0017] The second air duct is fixedly communicated with the side of the flue gas treatment bin near the bottom end and is communicated with the rotary jet head;

[0018] The pressurization bin has its bottom end and top end respectively communicated with the first air duct and the second air duct, and is used for squeezing the flue gas introduced by the first air duct until, after reaching a certain pressure, injecting the flue gas into the rotary jet head through the second air duct.

[0019] It should be understood that by leading the flue gas in the smelting furnace into the pressurization bin through the first air duct and when the pressure is increased to a certain value, injecting the flue gas into the rotary jet head through the second air duct. On the one hand, it is beneficial to gather enough flue gas, and on the other hand, through pressurization, it is beneficial to have enough power during exhaust. During the process of the rotary nozzle jetting, the flue gas can flow deep into the flue gas treatment liquid, which is beneficial to increasing the contact opportunity between the gas and the flue gas treatment liquid.

[0020] As an optional technical solution of the present invention, the pressurization bin further includes:

[0021] An exhaust pipe is fixedly communicated with the inner top surface of the pressurization bin and is communicated with the first air duct;

[0022] An exhaust hole is opened on the side surface of the exhaust pipe;

[0023] A moving piston is slidably sleeved on the surface of the exhaust pipe, and a support spring is fixedly connected between the top surface of the moving piston and the inner top surface of the pressurization bin;

[0024] A telescopic pipe is located between the top surface of the moving piston and the inner top surface of the pressurization bin, and both ends are fixedly connected to the top surface of the moving piston and the inner top surface of the pressurization bin respectively.

[0025] It should be understood that after the flue gas enters the pressurization bin, it will continuously gather and simultaneously act on the moving piston. When the pressure is high enough, the moving piston will compress the support spring and then move above the exhaust hole, and the flue gas will enter the exhaust pipe through the exhaust hole. Under the elastic pushing action of the support spring and the pressure action of the flue gas gathering, pressurization is formed.

[0026] As an optional technical solution of the present invention, the rotary nozzle includes:

[0027] An air vent seat is fixedly communicated with the end of the first air duct;

[0028] A rotary seat is rotatably connected to the top end of the air vent seat;

[0029] The first impeller, and the first impeller is fixedly installed on the inner wall of the rotating seat;

[0030] A plurality of jet pipes, and the plurality of jet pipes are fixedly communicated with the side wall of the rotating seat and are annularly arrayed above the first impeller.

[0031] It should be understood that during the process of the flue gas passing through the first impeller, the impeller will rotate, the impeller will synchronously drive the rotating seat to rotate, the rotating seat will synchronously drive the plurality of jet pipes to move, and the jet pipes will jet the flue gas towards the deep direction of the flue gas treatment liquid, which is beneficial for the flue gas to flow to the deep part of the flue gas treatment liquid and then flow upward, which is beneficial for extending the flow trajectory of the flue gas and increasing the treatment opportunity of the flue gas treatment liquid for the flue gas. And during the gas injection process, the jet pipes will stir the flue gas treatment liquid, which is beneficial for strengthening the uniform mixing of the flue gas treatment liquid and the flue gas.

[0032] As a further optimized technical solution of the present invention, the plurality of jet pipes are inclined to discharge the flue gas towards the bottom end inside the flue gas treatment chamber.

[0033] It should be understood that the inclined setting is to jet the flue gas towards the deep part of the flue gas treatment liquid.

[0034] As a further optimized technical solution of the present invention, it further includes a pumping assembly. The pumping assembly includes:

[0035] A water pump, the water inlet end of the water pump is communicated with the bottom end of the side wall of the flue gas treatment chamber, the water drainage end of the water pump is communicated with a pumping pipe, and the pumping pipe penetrates through the top end of the flue gas treatment chamber and is communicated with a spraying assembly to pump the flue gas treatment liquid in the flue gas treatment chamber to the spraying assembly.

[0036] It should be understood that by setting the water pump, the flue gas treatment liquid in the flue gas treatment chamber can be pumped to the spraying assembly, and the sprayed flue gas treatment liquid can further contact and treat the flue gas gathered above the flue gas treatment liquid inside the flue gas treatment chamber.

[0037] As an optional technical solution of the present invention, the spraying assembly further includes:

[0038] A sealing plate, and the sealing plate is rotationally communicated with the end of the pumping pipe;

[0039] A water collecting pool, and the top end of the water collecting pool is rotationally connected with the sealing plate;

[0040] A plurality of shunt pipes, and the plurality of shunt pipes are annularly arrayed on the side wall of the water collecting pool, and the annular nozzles are communicated through the shunt pipes to spray out a plurality of annular water curtains.

[0041] It should be understood that by arranging a plurality of annular spray heads, during the process of spraying the flue gas treatment liquid, multiple water curtains will be formed, and water mist will be formed between the multiple water curtains, so that the flue gas needs to break through multiple water curtains before it can be discharged from the flue gas treatment chamber. During the process of the flue gas breaking through the multiple water curtains, it will further contact and mix with the flue gas treatment liquid to achieve further treatment.

[0042] As an optional technical solution of the present invention, the drainage assembly includes:

[0043] A drainage cover, the drainage cover includes an exhaust part and a partition part, and the partition part divides the space of the flue gas treatment chamber into a spraying chamber and a liquid storage chamber;

[0044] An exhaust hood, the exhaust hood is rotationally communicated with the top of the exhaust part, and a plurality of inclined air outlet heads distributed in a circular array are fixedly communicated with the side wall;

[0045] A second impeller, the second impeller is fixedly connected to the inner wall of the exhaust hood so that the gas passes through the second impeller and then passes through the air outlet head.

[0046] It should be understood that during the process of the flue gas passing through the second impeller, the second impeller will rotate, the second impeller will synchronously drive the exhaust hood to rotate, the exhaust hood will drive the air outlet head to move, and the air outlet head moves along a circular track, which is beneficial to uniformly discharging the flue gas into the interior of the water curtain and exhausting the flue gas downward below the water curtain, so that the flue gas first enters the lower part of the water curtain and then flows upward through multiple water curtains, which is beneficial to the flow track of the flue gas and increases the contact opportunity with the flue gas treatment liquid. As a further optimized technical solution of the present invention,

[0047] A plurality of water dropping heads are fixedly communicated with the top of the partition part to realize the return of the water in the spraying chamber to the liquid storage chamber and disperse and sprinkle it into the liquid storage chamber to strike the flue gas treatment liquid in the liquid storage chamber for the mixed flue gas and strengthen the shaking of the flue gas treatment liquid.

[0048] It should be understood that by arranging the water dropping heads, the flue gas treatment liquid collected in the spraying chamber can be discharged into the liquid storage chamber and fall onto the liquid surface of the flue gas treatment liquid in the liquid storage chamber to form an impact, further increasing the fluidity of the flue gas treatment liquid and being beneficial to improving the mixing effect.

[0049] In a second aspect, a smelting process for preparing rare precious metals is provided, including the following steps:

[0050] Step 1, collecting gas: introducing the flue gas in the smelting furnace into the flue gas treatment chamber through the gas guiding assembly;

[0051] Step 2: Gas-liquid mixing: Through the gas injection component, the flue gas in the smelting furnace is injected into the flue gas treatment bin. The rotating jet head is used to rotate and inject the gas into the flue gas treatment liquid, so as to realize the agitation of the flue gas treatment liquid while injecting the flue gas, and achieve uniform gas-liquid mixing;

[0052] Step 3: Spray treatment: The drainage component converges the flue gas that penetrates the flue gas treatment liquid and drains it into the innermost water curtain with the smallest annular diameter among multiple annular water curtains, so that the flue gas is discharged after passing through multiple water curtains. During the process of the flue gas passing through the water curtain, the flue gas will come into contact with the water curtain to achieve further treatment.

[0053] Compared with the prior art, the beneficial effects of the present invention are:

[0054] 1. During the process of the rotating jet head discharging the flue gas into the flue gas treatment liquid, on the one hand, the flue gas can be evenly injected into multiple positions in the flue gas treatment liquid, which is beneficial to increasing the uniform contact between the flue gas and the flue gas treatment liquid. On the other hand, while injecting the gas, the rotating jet head will agitate the flue gas treatment liquid, so that the flue gas treatment liquid continuously flows and mixes with the flue gas, which is beneficial to the full mixing of the flue gas and the flue gas treatment liquid and is also beneficial to breaking the gas film, so that the flue gas treatment liquid can contact the flue gas after breaking through the gas film.

[0055] 2. The flue gas is collected inside the annular water curtain through the drainage component, so that the flue gas needs to break through multiple water curtains before it can be discharged, further treating the flue gas. And under the impact of the falling water curtain, it is easy to impact the flue gas and break the gas film, so that the impacted flue gas will flow between adjacent water curtains. There will be floating water mist between the water curtains, forming multiple treatment spaces, which is beneficial to the further contact between the flue gas and the flue gas treatment liquid and is beneficial to improving the treatment effect.

[0056] 3. The flue gas in the smelting furnace is led to the pressurization chamber through the first gas pipe. When the pressure is increased to a certain value, the flue gas is injected into the rotating jet head through the second gas pipe. On the one hand, it is beneficial to collect enough flue gas. On the other hand, through pressurization, it is beneficial to have enough power during exhaust. During the process of the rotating nozzle jetting gas, the flue gas can flow deep into the flue gas treatment liquid, which is beneficial to increasing the contact opportunity between the gas and the flue gas treatment liquid.

[0057] 4. During the process of the flue gas passing through the first impeller, the impeller will rotate. The impeller synchronously drives the rotating seat to rotate, and the rotating seat will synchronously move multiple gas pipes. The gas pipes will jet the flue gas in the direction of the deep part of the flue gas treatment liquid, which is beneficial to the flue gas flowing to the deep part of the flue gas treatment liquid and then flowing upward, which is beneficial to extending the flow trajectory of the flue gas and increasing the treatment opportunity of the flue gas treatment liquid for the flue gas. And during the process of injecting gas, the gas pipes will agitate the flue gas treatment liquid, which is beneficial to strengthening the uniform mixing of the flue gas treatment liquid and the flue gas.

[0058] 5. During the process of the flue gas passing through the second impeller, the second impeller rotates, which synchronously drives the exhaust hood to rotate. The exhaust hood drives the air outlet head to move, and the air outlet head moves along an annular trajectory, which is beneficial to evenly discharging the flue gas into the interior of the water curtain and exhausting the flue gas downward to the water curtain. This allows the flue gas to first enter the lower part of the water curtain and then flow upward through multiple water curtains, which is beneficial to the flow trajectory of the flue gas and increases the contact opportunity with the flue gas treatment liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is the process flow chart of the present invention;

[0060] Figure 2 is the overall structural schematic diagram of the smelting equipment of the present invention;

[0061] Figure 3 is the structural sectional view of the flue gas treatment chamber of the present invention;

[0062] Figure 4 is the mechanism sectional view of the spraying assembly and the drainage assembly of the present invention;

[0063] Figure 5 is Figure 4 the enlarged view of part A in

[0064] Figure 6 is the structural schematic diagram of the exhaust hood of the present invention;

[0065] Figure 7 is the structural sectional view of the water dropping head of the present invention;

[0066] Figure 8 is the structural sectional view of the rotating jet head of the present invention;

[0067] Figure 9 is Figure 8 the enlarged view of part B in

[0068] In the drawings, the list of components represented by each reference numeral is as follows:

[0069] Smelting furnace 1, furnace cover 2, consumable electrode 3, gas guiding assembly 4, first gas guiding pipe 401, second gas guiding pipe 402, pressurization chamber 403, exhaust pipe 404, exhaust hole 405, moving piston 406, support spring 407, telescopic pipe 408, flue gas treatment chamber 5, air outlet pipe 501, rotating jet head 6, air vent seat 601, rotating seat 602, first impeller 603, jet pipe 604, water pump 7, drainage assembly 8, drainage cover 801, exhaust part 80101, isolation part 80102, exhaust hood 802, air outlet head 803, second impeller 804, spraying assembly 9, sealing plate 901, water collecting pool 902, shunt pipe 903, annular spray head 904, water dropping head 10, downcomer 1001, cover body 1002, sealing ring 1003, return spring 1004, water dropping hole 1005, linkage shaft 11. Detailed implementation manner

[0070] Please refer to Figure 2-9 , the present invention provides a technical solution: a smelting device for preparing rare and precious metals, including a smelting furnace 1, a furnace cover 2 covering the top of the smelting furnace 1, and a consumable electrode 3 inserted through the furnace cover 2, characterized in that; further comprising:

[0071] A flue gas treatment assembly, the flue gas treatment assembly includes a gas guiding assembly 4 communicated with the furnace cover 2 and a flue gas treatment chamber 5 internally storing a flue gas treatment liquid and communicated with the gas guiding assembly 4, and the flue gas treatment liquid in the flue gas treatment chamber 5 is used for treating the passing gas;

[0072] Specifically, the top end of the flue gas treatment chamber 5 is also fixedly communicated with an air outlet pipe 501 for discharging the treated flue gas.

[0073] A spraying assembly 9, the spraying assembly 9 includes a plurality of annular spray heads 904 with different inner ring diameters, and the annular spray heads 904 are used for spraying the flue gas treatment liquid to form a plurality of annular water curtains;

[0074] An air injection assembly, the air injection assembly includes a rotating jet head 6 communicated with a gas guiding member and a drainage assembly 8, the rotating jet head 6 is used for rotatingly injecting gas into the flue gas treatment liquid to stir the flue gas treatment liquid while injecting the flue gas, which is beneficial to increasing the opportunity of water and gas to mix and contact, and the drainage assembly 8 is used for converging the flue gas passing through the flue gas treatment liquid and draining it into the innermost annular water curtain with the smallest inner ring diameter among the plurality of annular water curtains, so that the flue gas is discharged after passing through the plurality of water curtains, and the flue gas contacts the water curtain during the process of passing through the water curtain.

[0075] It should be understood that in the first stage of treating the flue gas, when the gas in the smelting furnace 1 is injected into the flue gas treatment chamber 5 through the air guiding assembly 4 and discharged into the flue gas treatment liquid through the rotating jet head 6, during the process that the rotating jet head 6 discharges the flue gas into the interior of the flue gas treatment liquid, on the one hand, the flue gas can be evenly injected into multiple positions in the flue gas treatment liquid, which is beneficial to increasing the uniform contact between the flue gas and the flue gas treatment liquid. On the other hand, while injecting gas, the rotating jet head 6 will stir the flue gas treatment liquid, so that the flue gas treatment liquid continuously flows and mixes with the flue gas in contact, which is beneficial to the full mixing of the flue gas and the flue gas treatment liquid and is also beneficial to breaking the gas film, so that the flue gas treatment liquid can break through the gas film and then contact with the flue gas treatment liquid;

[0076] In the second stage of treating the flue gas, the flue gas passing through the flue gas treatment liquid will gather above the liquid surface in the flue gas treatment chamber 5. The flue gas treatment liquid is sprayed through the spraying assembly 9 to form multiple annular water curtains. The flue gas is gathered inside the annular water curtains through the drainage assembly 8, so that the flue gas needs to break through multiple water curtains before it can be discharged, further treating the flue gas. And under the impact of the falling water curtains, it is easy to impact the flue gas and break the gas film, so that the impacted flue gas will flow between adjacent water curtains. There will be floating water mist between the water curtains, forming multiple treatment spaces, which is beneficial to the further contact between the flue gas and the flue gas treatment liquid and is beneficial to improving the treatment effect.

[0077] As an optional implementation manner of the present invention, the air guiding assembly 4 includes:

[0078] The first air duct 401, and the first air duct 401 is fixedly communicated with the top of the furnace cover 2;

[0079] The second air duct 402, and the second air duct 402 is fixedly communicated with the side of the flue gas treatment chamber 5 near the bottom end and is communicated with the rotating jet head 6;

[0080] The pressurizing chamber 403, the bottom end and the top end of the pressurizing chamber 403 are respectively communicated with the first air duct 401 and the second air duct 402, and are used for squeezing the flue gas introduced by the first air duct 401 until it reaches a certain pressure and then injecting the flue gas into the rotating jet head 6 through the second air duct 402.

[0081] It should be understood that the flue gas in the smelting furnace 1 is led into the pressurizing chamber 403 through the first air duct 401. When the pressure is increased to a certain value, the flue gas is injected into the rotating jet head 6 through the second air duct 402. On the one hand, it is beneficial to gather enough flue gas. On the other hand, through pressurization, it is beneficial to have enough power during exhaust. During the process of the rotating nozzle jetting gas, the flue gas can flow deep into the flue gas treatment liquid, which is beneficial to increasing the opportunity of contact between the gas and the flue gas treatment liquid.

[0082] As an optional implementation manner of the present invention, the pressurizing chamber 403 further includes:

[0083] An exhaust pipe 404, the exhaust pipe 404 is fixedly connected to the top surface inside the pressurization chamber 403 and is communicated with the first air duct 401;

[0084] An exhaust hole 405, the exhaust hole 405 is opened on the side surface of the exhaust pipe 404;

[0085] A moving piston 406, the moving piston 406 is slidably sleeved on the surface of the exhaust pipe 404, and a support spring 407 is fixedly connected between the top surface of the moving piston 406 and the top surface inside the pressurization chamber 403;

[0086] A telescopic pipe 408, the telescopic pipe 408 is located between the top surface of the moving piston 406 and the top surface inside the pressurization chamber 403, and both ends are fixedly connected to the top surface of the moving piston 406 and the top surface inside the pressurization chamber 403 respectively.

[0087] It should be understood that after the flue gas enters the pressurization chamber 403, it will continuously accumulate and simultaneously act on the moving piston 406. When the pressure is high enough, the moving piston 406 will compress the support spring and then move above the exhaust hole 405, and the flue gas will enter the exhaust pipe 404 through the exhaust hole 405. Under the elastic pushing action of the support spring 407 and the pressure action of the flue gas accumulation, pressurization is formed.

[0088] As an optional implementation manner of the present invention, the rotary nozzle includes:

[0089] An air vent seat 601, the air vent seat 601 is fixedly communicated with the end of the first air duct 401;

[0090] A rotary seat 602, the rotary seat 602 is rotatably connected to the top end of the air vent seat 601;

[0091] A first impeller 603, the first impeller 603 is fixedly installed on the inner wall of the rotary seat 602;

[0092] A plurality of jet pipes 604, the plurality of jet pipes 604 are fixedly communicated with the side wall of the rotary seat 602 and are annularly and arrayedly distributed above the first impeller 603.

[0093] It should be understood that during the process of the flue gas passing through the first impeller 603, the impeller will rotate, the impeller will synchronously drive the rotary seat 602 to rotate, the rotary seat 602 will synchronously move the plurality of jet pipes 604, and the jet pipes 604 will jet the flue gas towards the deep direction of the flue gas treatment liquid, which is beneficial to the flue gas flowing to the deep part of the flue gas treatment liquid and then flowing upward, which is beneficial to extending the flow trajectory of the flue gas and increasing the treatment opportunity of the flue gas treatment liquid for the flue gas. And during the air injection process, the jet pipes 604 will stir the flue gas treatment liquid, which is beneficial to strengthening the uniform mixing of the flue gas treatment liquid and the flue gas.

[0094] As a further optimized embodiment of the present invention, a plurality of jet pipes 604 are inclined to discharge the flue gas towards the bottom end inside the flue gas treatment chamber 5.

[0095] It should be understood that the inclined setting is to spray the flue gas deep into the flue gas treatment liquid.

[0096] As a further optimized embodiment of the present invention, it further includes a pumping assembly. The pumping assembly includes:

[0097] A water pump 7, the water inlet end of the water pump 7 is connected to the bottom end of the side wall of the flue gas treatment chamber 5, and the water discharge end of the water pump 7 is connected with a pumping pipe. The pumping pipe penetrates through the top end of the flue gas treatment chamber 5 and is connected to the spraying assembly 9 to pump the flue gas treatment liquid in the flue gas treatment chamber 5 to the spraying assembly 9.

[0098] It should be understood that by setting the water pump 7, the flue gas treatment liquid in the flue gas treatment chamber 5 can be pumped to the spraying assembly 9, and the sprayed flue gas treatment liquid can further contact and treat the flue gas collected above the flue gas treatment liquid inside the flue gas treatment chamber 5.

[0099] As an alternative embodiment of the present invention, the spraying assembly 9 further includes:

[0100] A sealing plate 901, the sealing plate 901 is rotatably connected to the end of the pumping pipe;

[0101] A water collecting pool 902, the top end of the water collecting pool 902 is rotatably connected to the sealing plate 901;

[0102] A plurality of shunt pipes 903, the plurality of shunt pipes 903 are annularly arrayed on the side wall of the water collecting pool 902, and the annular nozzles 904 are connected through the shunt pipes 903 to spray out a plurality of annular water curtains.

[0103] It should be understood that by setting a plurality of annular nozzles 904, during the process of spraying the flue gas treatment liquid, multiple layers of water curtains will be formed, and water mist will be formed between the multiple layers of water curtains, so that the flue gas needs to break through multiple water curtains before it can be discharged from the flue gas treatment chamber 5. During the process of the flue gas breaking through multiple water curtains, it will further contact and mix with the flue gas treatment liquid to achieve further treatment.

[0104] As an alternative embodiment of the present invention, the drainage assembly 8 includes:

[0105] A drainage cover 801, the drainage cover 801 includes an exhaust part 80101 and an isolation part 80102, and the isolation part 80102 divides the space of the flue gas treatment chamber 5 into a spraying cavity and a liquid storage cavity;

[0106] An exhaust hood 802, the exhaust hood 802 is rotatably connected to the top end of the exhaust part 80101, and a plurality of inclined air outlet heads 803 distributed in an annular array are fixedly connected to the side wall;

[0107] The second impeller 804 is fixedly connected to the inner wall of the exhaust hood 802 so that the gas passes through the second impeller 804 and then passes through the air outlet head 803.

[0108] It should be understood that during the process of the flue gas passing through the second impeller 804, the second impeller 804 will rotate, the second impeller 804 will synchronously drive the exhaust hood 802 to rotate, the exhaust hood 802 will drive the air outlet head 803 to move, and the air outlet head 803 will move along an annular trajectory, which is beneficial to evenly discharging the flue gas into the interior of the water curtain and exhausting the flue gas downward to the water curtain, so that the flue gas first enters the lower part of the water curtain and then flows upward through multiple water curtains, which is beneficial to the flow trajectory of the flue gas and increases the contact opportunity with the flue gas treatment liquid.

[0109] As a further optimized embodiment of the present invention,

[0110] A plurality of water dropping heads 10 distributed in an annular array are fixedly communicated with the top of the isolation part 80102 to realize the return of the water in the spray cavity to the liquid storage cavity and disperse and sprinkle it into the liquid storage cavity, so as to strike the flue gas treatment liquid in the liquid storage cavity for the mixed flue gas and strengthen the shaking of the flue gas treatment liquid.

[0111] It should be understood that by arranging the water dropping heads 10, the flue gas treatment liquid collected in the spray cavity can be discharged into the liquid storage cavity and fall onto the liquid surface of the flue gas treatment liquid in the liquid storage cavity to form an impact, further increasing the fluidity of the flue gas treatment liquid and being beneficial to improving the mixing effect.

[0112] It needs to be further defined that the water dropping head 10 is internally provided with a downcomer 1001, the surface of the downcomer 1001 is fixedly sleeved with a cover body 1002, the cover body 1002 is fixedly communicated with the isolation part 80102, a sealing ring 1003 is slidably sealed between the inner wall of the cover body 1002 and the outer wall of the downcomer 1001, a return spring 1004 is fixedly connected between the sealing ring 1003 and the bottom of the inner wall of the cover body 1002, and a water dropping hole 1005 is formed in the side wall of the downcomer 1001. When the sealing ring 1003 moves to below the water dropping hole 1005 under the action of the gravity of the water in the spray cavity, the water drops.

[0113] It should be understood that through the design of the sealing ring 1003 and the return spring 1004, the flue gas treatment liquid in the spray cavity can collect a sufficient amount before enough pressure can be exerted on the sealing ring 1003, so that the sealing ring 1003 compresses the return spring 1004 and moves to below the water dropping hole 1005 to discharge the flue gas treatment liquid collected in the spray cavity. On the one hand, a certain depth of flue gas treatment liquid is always maintained in the spray cavity, which is beneficial to generating water mist when the water curtain falls and impacts during the spraying process and increasing the contact opportunity between the flue gas and the flue gas treatment liquid.

[0114] It should be further specified that a linkage shaft 11 is fixedly connected to the top of the second impeller 804. The linkage shaft 11 penetrates through the exhaust hood 802 and is fixedly connected to the water collecting tank 902.

[0115] It should be understood that driven by the linkage shaft 11, the water collecting tank 902 will be driven to rotate, and the annular spray heads 904 of the synchronous belt will rotate. As a result, the water columns of the water curtain will be more evenly distributed, enabling the water outlet of the annular spray head 904 to move to various positions on the annular track and reducing the gaps between the water columns, which is beneficial to increasing the contact opportunity between the flue gas treatment liquid and the flue gas.

[0116] As Figure 1 shown, a smelting process for the preparation of rare and precious metals is provided, including the following steps:

[0117] Step 1: Gas collection: The flue gas in the smelting furnace 1 is introduced into the flue gas treatment chamber 5 through the gas guiding assembly 4.

[0118] Step 2: Gas-liquid mixing: Through the gas injection assembly, the flue gas in the smelting furnace 1 is injected into the flue gas treatment chamber 5. The rotating jet head 6 is used to rotate and inject the gas into the flue gas treatment liquid, so as to stir the flue gas treatment liquid while injecting the flue gas, realizing uniform gas-liquid mixing.

[0119] Step 3: Spray treatment: The drainage assembly 8 converges the flue gas passing through the flue gas treatment liquid and drains it into the innermost water curtain with the smallest annular diameter among multiple annular water curtains, so that the flue gas is discharged after passing through multiple water curtains. During the process of the flue gas passing through the water curtain, the flue gas will come into contact with the water curtain to achieve further treatment.

Claims

1. A smelting device for preparing rare and precious metals, comprising a smelting furnace (1), a furnace cover (2) arranged on the top of the smelting furnace (1), and a consumable electrode (3) inserted through the furnace cover (2), characterized in that; Also includes: A flue gas treatment component, the flue gas treatment component comprising an air guide component (4) in communication with the furnace cover (2) and a flue gas treatment chamber (5) in communication with the air guide component (4) and containing a flue gas treatment liquid, wherein the flue gas treatment liquid in the flue gas treatment chamber (5) is used to treat the gas passing therethrough; A spray assembly (9), the spray assembly (9) comprising a plurality of annular spray heads (904) with inner ring diameters of different sizes, the annular spray heads (904) being used to spray the flue gas treatment liquid to form a plurality of annular water curtains; An air injection component, the air injection component comprising a rotating jet head (6) and a drainage component (8) connected to the air guide pipe, the rotating jet head (6) being used to rotate and spray gas into the flue gas treatment liquid, so as to achieve the stirring of the flue gas treatment liquid while injecting the flue gas, which is conducive to increasing the chance of mixing and contacting water and gas, and the drainage component (8) being used to gather the flue gas that has passed through the flue gas treatment liquid and then drain it into the water curtain with the smallest inner ring diameter among the multiple annular water curtains, so that the flue gas is discharged after passing through the multiple water curtains, and contacts the water curtains during the process of the flue gas passing through the water curtains; Also included is a pumping assembly, the pumping assembly comprising: A water pump (7), wherein the water inlet end of the water pump (7) is connected to the bottom end of the side wall of the flue gas treatment chamber (5), and the water outlet end of the water pump (7) is connected to a pumping pipe, and the pumping pipe passes through the top of the flue gas treatment chamber (5) and is connected to the spraying assembly (9), so as to realize pumping the flue gas treatment liquid in the flue gas treatment chamber (5) to the spraying assembly (9); The spray assembly (9) further comprises: A sealing plate (901), the sealing plate (901) being rotatably connected to the end of the pumping pipe; A water collecting pool (902), the top end of which is rotatably connected to the sealing plate (901); A plurality of diverter pipes (903), wherein the plurality of diverter pipes (903) are distributed in an annular array on the side wall of the water collecting pool (902), and the annular spray heads (904) are connected through the diverter pipes (903) to spray a plurality of annular water curtains; The drainage component (8) comprises: A drainage hood (801), the drainage hood (801) comprising an exhaust portion (80101) and an isolation portion (80102), the isolation portion (80102) dividing the space of the smoke treatment chamber (5) into a spray chamber and a liquid storage chamber; An exhaust hood (802), the exhaust hood (802) is rotatably connected to the top of the exhaust portion (80101), and a plurality of obliquely arranged exhaust heads (803) distributed in a circular array are fixedly connected to the side wall; A second impeller (804), the second impeller (804) being fixedly connected to the inner wall of the exhaust hood (802), so that the gas passes through the second impeller (804) and then through the gas outlet head (803); The top of the isolation part (80102) is fixedly connected to a plurality of water droppers (10) distributed in a circular array, so as to realize the return of water in the spray chamber to the liquid storage chamber, and disperse and sprinkle into the liquid storage chamber, so as to strike the flue gas treatment liquid mixed with the flue gas in the liquid storage chamber, thereby enhancing the shaking of the flue gas treatment liquid; A water pipe (1001) is provided in the water head (10), a cover body (1002) is fixedly sleeved on the surface of the water pipe (1001), the cover body (1002) is fixedly connected with the isolation part (80102), a sealing ring (1003) is slidably sealed between the inner wall of the cover body (1002) and the outer wall of the water pipe (1001), a return spring (1004) is fixedly connected between the sealing ring (1003) and the bottom of the inner wall of the cover body (1002), a water hole (1005) is opened on the side wall of the water pipe (1001), and water is dropped when the sealing ring (1003) is moved to the bottom of the water hole (1005) by the gravity of the water in the spray chamber.

2. The smelting equipment for preparing rare and precious metals according to claim 1, characterized in that: The air guide component (4) comprises: A first air guide pipe (401), the first air guide pipe (401) being fixedly connected to the top of the furnace cover (2); A second air duct (402), the second air duct (402) being fixedly connected to a position on the side of the smoke treatment chamber (5) near the bottom end, and being connected to the rotating nozzle (6); A pressurizing chamber (403), the bottom and top of which are respectively connected to the first air duct (401) and the second air duct (402), for squeezing the smoke introduced by the first air duct (401) until a certain pressure is reached and then injecting the smoke into the rotating nozzle (6) through the second air duct (402).

3. The smelting equipment for preparing rare and precious metals according to claim 2, characterized in that: The pressurizing chamber (403) further comprises: An exhaust pipe (404), the exhaust pipe (404) being fixedly connected to the top surface inside the pressurizing chamber (403) and connected to the first air guide pipe (401); An exhaust hole (405), wherein the exhaust hole (405) is opened on a side of the exhaust pipe (404); A movable piston (406), wherein the movable piston (406) is slidably sleeved on the surface of the exhaust pipe (404), and a support spring (407) is fixedly connected between the top surface and the inner top surface of the boost chamber (403); The telescopic tube (408) is located between the top surface of the movable piston (406) and the inner top surface of the pressurizing chamber (403), and the two ends are respectively fixedly connected to the top surface of the movable piston (406) and the inner top surface of the pressurizing chamber (403).

4. The smelting equipment for preparing rare and precious metals according to claim 3, characterized in that: The rotary nozzle comprises: A vent seat (601), the vent seat (601) being fixedly connected to an end of the first air guide pipe (401); A rotating seat (602), the rotating seat (602) is rotatably connected to the top end of the vent seat (601); A first impeller (603), the first impeller (603) being fixedly mounted on the inner wall of the rotating seat (602); A plurality of air injection pipes (604) are fixedly connected to the side wall of the rotating seat (602) and are distributed in an annular array above the first impeller (603).

5. The smelting equipment for preparing rare and precious metals according to claim 4, characterized in that: The plurality of gas injection pipes (604) are arranged at an angle so as to discharge the smoke toward the bottom end of the smoke treatment chamber (5).

6. A smelting process for preparing rare and precious metals, applicable to the smelting equipment for preparing rare and precious metals according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Collecting gas: guiding the flue gas in the smelting furnace (1) into the flue gas treatment chamber (5) through the gas guide component (4); Step 2, gas-liquid mixing: the flue gas in the smelting furnace (1) is injected into the flue gas treatment chamber (5) through the gas injection component, and the rotating nozzle (6) is used to rotate and inject the gas into the flue gas treatment liquid, so as to stir the flue gas treatment liquid and inject the flue gas at the same time, so as to achieve uniform mixing of gas and liquid; Step 3, spray treatment: The drainage component (8) gathers the flue gas that passes through the flue gas treatment liquid and drains it to the inside of the water curtain with the smallest annular diameter among the multiple annular water curtains, so that the flue gas is discharged after passing through the multiple water curtains. In the process of the flue gas passing through the water curtains, the flue gas will contact the water curtains to achieve further treatment.

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