Method and equipment for reducing the generation amount of waste residue in the metal processing process

Abstract

The present application relates to a method and equipment for reducing the generation amount of waste slag in the metal processing process, which is applied in the field of metal smelting. The method includes the following steps: preparing materials with a set volume and preheating the materials to be processed; performing stepwise heating on a narrow-mouth furnace, and performing stirring, inspection, and composition adjustment; putting a slag-making agent into the narrow-mouth furnace, and clearing out the waste slag with the furnace cover in a closed state after slag-making is completed; introducing the fusion in the narrow-mouth furnace into a holding furnace through a closed-type furnace guiding trough; putting a slag-making agent into the holding furnace, and clearing out the waste slag with the holding furnace cover in a closed state after slag-making is completed. The equipment includes: a narrow-mouth furnace, a holding furnace, and a closed-type furnace guiding trough; a narrow-mouth section with a rectangular cross-section is provided at the port of the narrow-mouth furnace, and a closed-type slag skimming unit for the furnace is provided at the port of the narrow-mouth furnace; the holding furnace is arranged in a quadrangular prism structure, and a closed-type slag skimming unit for the holding furnace is provided at the port of the holding furnace. The present application has the effect of reducing the generation amount of waste slag.

Description

Technical Field

[0001] This application belongs to the field of metal smelting, and in particular relates to a method for reducing the amount of waste slag generated during metal processing. In addition, it also relates to an apparatus for reducing the amount of waste slag generated during metal processing. Background Art

[0002] Metal smelting is a common metal processing method, which melts solid-phase metal into liquid-phase metal to facilitate refining of the metal or adding other metals to the metal to form an alloy.

[0003] During the process of metal smelting, once the liquid-phase metal comes into contact with the outside world, an oxide layer will form on its surface to generate waste slag, and other impurities in the liquid-phase metal will also form solid waste slag. The waste slag needs to be removed in time to avoid affecting the overall quality of the product. If the frequency of waste slag removal is too high, the amount of waste slag generated will be larger, reducing the material utilization rate in the production process, resulting in waste and economic losses.

[0004] In the prior art, when cleaning the generated waste slag, workers often use a slag rake to remove the waste slag in the furnace. During the slag removal process, the furnace opening is often open, which easily allows oxygen to enter the furnace body, causing an oxide layer to continue to form on the surface of the molten metal to generate waste slag, resulting in the amount of waste slag still being difficult to effectively control. Moreover, during the process of opening the furnace for slag removal, the temperature of the liquid-phase metal in the furnace is too high, and the risk of slag removal is also greater.

[0005] In view of this, a method for reducing the amount of waste slag generated during metal processing is needed. Summary of the Invention

[0006] In order to improve the problems of a large amount of waste slag generated during the process of metal smelting and high risk during the slag removal operation, this application provides a method and an apparatus for reducing the amount of waste slag generated during metal processing.

[0007] The first aspect of this application provides a method for reducing the amount of waste slag generated during metal processing, including the following steps:

[0008] Stock preparation and feeding: Preheat the solid-phase material to be processed, and set the volume of the solid-phase material so that after being added to a narrow-mouth furnace and melted, the liquid level in the narrow-mouth furnace reaches the narrow-mouth position;

[0009] Heating and melting: Gradually increase the temperature of the narrow-mouth furnace in a stepped manner, stir the mixture in the narrow-mouth furnace when reaching the first set temperature, and inspect and adjust the composition of the mixture when reaching the second set temperature;

[0010] Furnace refining and slag removal: Add a slag-forming agent to the narrow-mouth furnace, and after the slag formation is completed, remove the waste slag with the furnace cover closed;

[0011] Furnace guiding: guiding the fusion in the narrow - mouth furnace into the holding furnace through a closed guiding trough;

[0012] Refining and slag skimming in the holding furnace: putting the slag - making agent into the holding furnace, and after slag - making is completed, clearing the waste slag with the cover of the holding furnace closed.

[0013] By adopting the above - mentioned technical solution, using a narrow - mouth furnace can ensure that the contact surface between the molten metal and air is small, reduce the generation of waste slag, and through the design of a special furnace cover and the cover of the holding furnace, during the slag - skimming process, both the furnace cover and the cover of the holding furnace are in a closed state, which can effectively reduce the air entering the narrow - mouth furnace and the holding furnace, prevent the air mixed in during the slag - skimming process from continuing to oxidize the surface of the molten metal, thereby effectively reducing the amount of waste slag generated during the slag - skimming process. In addition, since slag - skimming can be carried out without opening the furnace cover and the cover of the holding furnace, the safety of the slag - skimming operation is higher.

[0014] Optionally, the solid - phase material includes high - purity metal ingots and master alloys; the temperature difference between the heating temperature of each stage in the step - wise heating and the furnace temperature of the narrow - mouth furnace is 100 to 200 °C; a magnetic stirring device is used to stir the fusion during the heating and melting step.

[0015] By adopting the above - mentioned technical solution, selecting high - purity metal ingots can reduce the entry of impurities, thereby reducing the amount of waste slag from the source. Master alloys are easier to melt, which can reduce the melting time of the solid - phase material; adopting the step - wise heating method to heat up and maintaining the temperature difference between the set heating temperature and the furnace temperature can make the energy consumption required for heating low, and it is not easy to cause the surface of the solid - phase material to be rapidly oxidized to generate a large amount of waste slag; using magnetic stirring makes the stirring process softer and not easy to damage the surface oxide layer, thereby reducing the amount of waste slag.

[0016] The second aspect of the present application provides a device for reducing the generation amount of waste slag during metal processing, adopting the following technical solution:

[0017] A device for reducing the generation amount of waste slag during metal processing includes the narrow - mouth furnace, the holding furnace, and the closed guiding trough described in the technical solution of the method for reducing the generation amount of waste slag during metal processing; a narrow - mouth section is provided at the port of the narrow - mouth furnace, the cross - section of the narrow - mouth section is rectangular, the narrow - mouth position is at the narrow - mouth section, and a closed - type slag - skimming unit for the furnace is provided at the port of the narrow - mouth furnace; the holding furnace is set as a quadrangular prism structure, and a closed - type slag - skimming unit for the holding furnace is provided at the port of the holding furnace.

[0018] By adopting the above technical scheme, a closed slag removal unit for the melting furnace and a closed slag removal unit for the insulation furnace are provided, so that there is no need to open the cover during the slag removal process, which can not only ensure the safety of the slag removal operation, but also ensure that the amount of air mixed into the furnace during the slag removal process is small, thereby avoiding the situation where an oxide layer is still generated to form waste slag during slag removal.

[0019] Specifically, the closed furnace slag removal unit comprises a furnace cover, a furnace flexible cover plate arranged on the furnace cover, a pair of furnace flexible cover plate retractors arranged opposite to each other, and a furnace slag rake arranged on the furnace flexible cover plate;

[0020] The furnace cover is provided with a furnace slag removal groove extending along the length direction of the furnace cover, and the furnace flexible cover plate is provided with a through-hole structure;

[0021] The slag rake of the slag furnace comprises a rake head and a rake rod, wherein the rake head of the slag rake of the slag furnace can be placed in the narrow-mouthed slag furnace, one end of the rake rod of the slag rake of the slag furnace is connected to the rake head, and the other end of the rake rod can pass through the slag trough of the slag furnace and pass out from the through-hole structure on the flexible cover plate of the slag furnace;

[0022] The two ends of the furnace flexible cover are connected to the corresponding furnace flexible cover retractors, so that the furnace slag rake can be controlled to move along the length direction of the furnace flexible cover via the furnace flexible cover retractors to scrape the waste slag to the furnace threshold of the port of the narrow-mouth furnace.

[0023] By adopting the above technical scheme, a furnace slag trough is provided, which can facilitate the furnace slag rake to move and collect waste slag in a narrow-mouth furnace. Both ends of the furnace flexible cover are connected to the corresponding furnace flexible cover retractors, so that the furnace flexible cover can move along the direction of the furnace cover body, thereby driving the furnace slag rake to move and collect waste slag in the narrow-mouth furnace. In the process of the furnace slag rake moving to collect waste slag, the furnace flexible cover can cover the furnace slag trough, making it difficult for air to enter the narrow-mouth furnace, thereby preventing the continuous generation of an oxide layer on the surface of the liquid metal and the formation of a large amount of waste slag.

[0024] Furthermore, the furnace threshold extends in a direction away from the narrow-mouth furnace to form a furnace flange platform structure, and the furnace cover body cooperates with the furnace flange platform structure to form a furnace rake head channel suitable for the rake head of the furnace slag rake to pass through, and a furnace rotating valve plate is provided at the bottom of the furnace flange platform structure. When the furnace rotating valve plate is in a first working position, the furnace rake head channel can be closed, and when in a second working position, a furnace slag outlet suitable for the rake head to escape downward can be formed at the bottom of the furnace flange platform structure.

[0025] By adopting the above technical solution, the furnace slag rake can be placed on the outside of the narrow-mouth furnace during the smelting process to protect the furnace slag rake from metal corrosion and thermal corrosion; the furnace rake head channel is closed by rotating the valve plate of the furnace so that air is not easy to enter the narrow-mouth furnace during the smelting and slagging process, thereby reducing the oxide layer formed on the surface of the liquid metal, thereby achieving the effect of reducing waste slag.

[0026] Furthermore, the furnace cover is also provided with a furnace slag-forming agent feed port and a furnace observation slot, and the furnace observation slot is covered with a high-temperature resistant transparent plate.

[0027] By adopting the above technical solution, slag-forming agent can be added into the furnace through the slag-forming agent feed port of the furnace, and the slag discharge and slag removal conditions can be observed through the furnace observation slot.

[0028] Furthermore, a furnace guide groove inlet is provided at one end portion of the closed furnace guide groove, so as to be connected to the furnace discharge port at the bottom of the narrow-mouthed furnace via the furnace guide groove inlet, and a discharge port blocking member is provided at the furnace discharge port. The end portion of the other end of the closed furnace guide groove is closed, and a furnace guide groove outlet is provided on the side wall near the end portion, and the furnace guide groove outlet is arranged toward the ground and is connected to the feed port of the insulation furnace.

[0029] By adopting the above technical solution, a closed furnace guide trough is provided, which can reduce or avoid the contact between liquid metal and air during the furnace guide process, and the furnace guide trough outlet is provided on the side wall of the closed furnace guide trough and downwardly provided to be connected to the feed port of the insulation furnace, so that the liquid metal can flow into the insulation furnace in the form of undercurrent, thereby not destroying the surface oxide layer and reducing the generation of waste slag in the insulation furnace.

[0030] Furthermore, the closed furnace guide trough also includes a sealing piece extraction outlet and a furnace guide trough cover plate, a discharge port sealing piece accommodating cavity is formed on the furnace guide trough cover plate, a through hole structure is provided on the discharge port sealing piece accommodating cavity, the discharge port sealing piece is connected to one end of the discharge port sealing piece connecting rod, and the other end of the discharge port sealing piece connecting rod can pass through the sealing piece extraction outlet and pass through the through hole structure on the discharge port sealing piece accommodating cavity.

[0031] By adopting the above technical scheme, setting a sealing piece withdrawal outlet can facilitate the withdrawal of the discharge port sealing piece to realize furnace conduction, and the pulled out discharge port sealing piece can be accommodated in the discharge port sealing piece accommodating chamber to facilitate the flow of liquid metal, and the furnace conduction groove cover plate can cover the sealing piece withdrawal outlet, so that air is not easy to enter the closed furnace conduction groove, which can prevent the formation of an oxide layer on the surface of the liquid metal and the formation of waste slag. In addition, the movable furnace conduction groove cover plate can realize the opening of the sealing piece withdrawal outlet, which is convenient for observing the inside of the closed furnace conduction groove.

[0032] Furthermore, the closed slag removal unit of the insulation furnace comprises an insulation furnace cover, an insulation furnace flexible cover plate arranged on the insulation furnace cover, a pair of insulation furnace flexible cover plate retractors arranged opposite to each other, and an insulation furnace slag rake arranged on the insulation furnace flexible cover plate;

[0033] The insulation furnace cover is provided with an insulation furnace slag removal groove extending along the length direction of the insulation furnace cover, and the insulation furnace flexible cover plate is provided with a through-hole structure;

[0034] The insulation furnace slag rake comprises a rake head and a rake rod, the rake head of the insulation furnace slag rake can be placed in the insulation furnace, one end of the rake rod of the insulation furnace slag rake is connected to the rake head, and the other end can pass through the insulation furnace slag removal groove and pass through the through-hole structure on the flexible cover plate of the insulation furnace;

[0035] The two ends of the insulation furnace flexible cover are connected to the corresponding insulation furnace flexible cover retractors, so that the insulation furnace slag rake can be controlled to move along the length direction of the insulation furnace flexible cover via the insulation furnace flexible cover retractors to scrape the waste slag to the insulation furnace threshold located at the port of the insulation furnace.

[0036] By adopting the above technical scheme, a slag scraping trough of the insulation furnace is provided, which can facilitate the insulation furnace slag rake to move and collect waste slag in the insulation furnace. Both ends of the insulation furnace flexible cover are connected to the corresponding insulation furnace flexible cover retractors, so that the insulation furnace flexible cover can move along the direction of the insulation furnace cover body, thereby driving the insulation furnace slag rake to move and collect waste slag in the insulation furnace. In the process of the insulation furnace slag rake moving to collect waste slag, the insulation furnace flexible cover can cover the insulation furnace slag scraping trough, making it difficult for air to enter the insulation furnace, thereby preventing the continuous generation of an oxide layer on the surface of the liquid metal and the formation of a large amount of waste slag.

[0037] Furthermore, the insulation furnace threshold extends in a direction away from the insulation furnace to form an insulation furnace flange platform structure, and the insulation furnace cover body cooperates with the insulation furnace flange platform structure to form an insulation furnace rake head channel suitable for the rake head of the insulation furnace slag rake to pass through, and an insulation furnace rotating valve plate is provided at the bottom of the insulation furnace flange platform structure. When the insulation furnace rotating valve plate is in the first working position, the insulation furnace rake head channel can be closed, and when it is in the second working position, an insulation furnace slag outlet suitable for the rake head to escape downward can be formed at the bottom of the insulation furnace flange platform structure; the insulation furnace cover body is also provided with an insulation furnace slag-making agent feeding port and an insulation furnace observation groove, and the insulation furnace observation groove is covered with a high-temperature resistant transparent plate.

[0038] By adopting the above technical solutions, the insulating furnace slag rake can be placed outside the insulating furnace during the smelting process to protect the insulating furnace slag rake from being easily corroded by metal and thermally corroded. The insulating furnace rake head passage is closed by the insulating furnace rotating valve plate, so that air is not easily introduced into the insulating furnace during the smelting and slag skimming processes, thereby reducing the oxide layer formed on the surface of the liquid metal and achieving the effect of reducing waste slag. Moreover, the slag-making agent can be added into the insulating furnace through the insulating furnace slag-making agent feed port, and the slag discharging situation and slag skimming situation can be observed through the insulating furnace observation tank.

[0039] In summary, the present application includes at least one of the following beneficial technical effects:

[0040] 1. Using a narrow-mouth melting furnace can ensure a small contact surface between the molten metal and air, reducing the generation of waste slag. Through the special designs of the melting furnace cover and the insulating furnace cover, during the metal smelting and slag skimming processes, both the melting furnace cover of the narrow-mouth melting furnace and the insulating furnace cover of the insulating furnace are closed, preventing air from entering the narrow-mouth melting furnace and the insulating furnace, especially during the slag skimming process. This can prevent the continuous formation of an oxide layer on the surface of the liquid metal in the furnace, avoiding the generation of a large amount of waste slag. Moreover, since slag skimming can be carried out without opening the melting furnace cover and the insulating furnace cover, the safety of the slag skimming operation is higher.

[0041] 2. Setting the ladle trough connecting the narrow-mouth melting furnace and the insulating furnace as a closed ladle trough can prevent the liquid metal from coming into contact with air and oxidizing to generate waste slag during the ladling process, thus reducing the amount of waste slag generated during the ladling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a three-dimensional structural schematic diagram of the equipment for reducing the generation amount of waste slag during the metal processing process of the present application.

[0043] Figure 2 is an internal structural schematic diagram of the equipment for reducing the generation amount of waste slag during the metal processing process of the present application.

[0044] Figure 3 is an internal structural schematic diagram of the narrow-mouth melting furnace in the equipment for reducing the generation amount of waste slag during the metal processing process of the present application.

[0045] Figure 4 is a structural schematic diagram of the closed ladle trough in the equipment for reducing the generation amount of waste slag during the metal processing process of the present application.

[0046] Figure 5 is an internal structural schematic diagram of the insulating furnace in the equipment for reducing the generation amount of waste slag during the metal processing process of the present application.

[0047] Reference numerals: 1, narrow-mouth furnace; 11, narrow-mouth section; 12, furnace cover body; 121, slag skimming trough of the furnace; 13, flexible furnace cover plate; 14, flexible furnace cover plate retractor; 15, furnace slag rake; 16, furnace sill; 161, rotary valve plate of the furnace; 17, discharge port plugging member; 18, connecting rod of the discharge port plugging member; 2, holding furnace; 21, holding furnace cover body; 211, slag skimming trough of the holding furnace; 22, flexible holding furnace cover plate; 23, flexible holding furnace cover plate retractor; 24, holding furnace slag rake; 25, holding furnace sill; 251, rotary valve plate of the holding furnace; 3, closed furnace guiding trough; 31, guiding trough inlet; 32, guiding trough outlet; 33, plugging member extraction port; 34, guiding trough cover plate. Detailed implementation mode

[0048] The following is a further detailed description of the present application in conjunction with the attached Figures 1-5 drawings.

[0049] The embodiment of the present application discloses a method for reducing the generation amount of waste slag in the metal processing process.

[0050] A method for reducing the generation amount of waste slag in the metal processing process includes the following steps:

[0051] Stock preparation and feeding: Taking the melting of aluminum alloy as an example, during stock preparation, high-purity aluminum ingots and master alloys can be selected as the materials for melting aluminum alloy. Using high-purity aluminum ingots can reduce the amount of impurities entering the furnace, thereby reducing the amount of waste slag from the source. Master alloys have the characteristics of fast melting and low melting point, which can reduce the heating time during the melting process and lower the heating temperature required during melting, so that during the melting process, the surface of the solid-phase material is not prone to generate a large amount of oxidation when it is not melted, thereby reducing the generation amount of waste slag; the prepared solid-phase materials can be preheated in a flue gas waste heat furnace to achieve the effect of efficiently using heat energy and reducing the melting time; as Figure 1 and Figure 2 shown, the furnace can be set as a narrow-mouth furnace 1, and the volume of the solid-phase material is set so that after being added to the narrow-mouth furnace 1 and melted, the liquid level in the narrow-mouth furnace 1 reaches the narrow-mouth position, so that the contact surface between the molten liquid metal and air is small, thereby making the area of the generated oxide layer small and reducing the generation of waste slag.

[0052] Heating and melting: The narrow-mouth furnace 1 is heated step by step. During the step-by-step heating, the temperature difference between the heating temperature at each stage and the furnace temperature of the narrow-mouth furnace 1 can be maintained at 100 to 200 °C, so that the energy consumption required during heating is low, and it is not easy for the surface of the solid-phase material to be rapidly oxidized to produce a large amount of waste slag. When the first set temperature is reached (taking the melting of aluminum alloy as an example, the first set temperature can be set at 700 ± 10 °C), the mixture in the narrow-mouth furnace 1 is stirred, and when the second set temperature is reached (taking the melting of aluminum alloy as an example, the second set temperature can be set at 745 ± 2 °C), the mixture is inspected and its composition is adjusted until the required composition is prepared. Among them, when stirring the mixture, a magnetic stirring device can be selected to stir it. The magnetic stirring device uses the electromagnetic effect to generate eddy currents inside the liquid metal to achieve the stirring of the liquid metal. This stirring method can ensure the sufficiency of stirring while avoiding damage to the surface oxide layer of the liquid metal, thereby reducing the oxidation amount of the liquid metal and achieving the purpose of reducing the generation amount of waste slag.

[0053] Furnace refining and slag skimming: Add a slag-making agent into the narrow-mouth furnace 1. After the slag-making is completed, the waste slag is removed with the furnace cover 12 closed. Taking the melting of aluminum alloy as an example, the slag-making agent can be selected as sodium fluorosilicate. Sodium fluorosilicate reacts with the oxide layer on the surface of the molten aluminum to generate aluminum fluoride. Aluminum fluoride will undergo an exothermic reaction with aluminum and oxygen. The heat released by the reaction can make the viscous molten slag become loose powder-like dry slag. During the formation of the dry slag, the wettability between the molten aluminum and the oxides in the aluminum slag becomes smaller, causing the granular aluminum droplets mixed in the aluminum slag to break away and return to the melt, thereby reducing the amount of waste slag and increasing the utilization rate of aluminum. And during the slag skimming process, the furnace cover 12 is in a closed state, which can effectively reduce the air entering the narrow-mouth furnace 1 and prevent the air mixed in during the slag skimming process from continuously oxidizing the surface of the molten metal, thereby effectively reducing the amount of waste slag generated during the slag skimming process. In addition, since the slag skimming can be carried out without opening the furnace cover 12, the safety of the slag skimming operation is higher.

[0054] Furnace guiding: The mixture in the narrow-mouth furnace 1 is introduced into the holding furnace 2 through the closed guiding furnace trough 3. Setting the guiding furnace trough as the closed guiding furnace trough 3 can reduce or avoid the contact between the liquid metal and the air during the furnace guiding process, thereby reducing the generation of waste slag.

[0055] Refining and slag skimming in the holding furnace: Add slag-making agent into the holding furnace 2. After the slag-making is completed, remove the waste slag with the cover body 21 of the holding furnace closed. Taking the smelting of aluminum alloy as an example, sodium fluorosilicate can be selected as the slag-making agent. Sodium fluorosilicate reacts with the oxide layer on the surface of the molten aluminum to generate aluminum fluoride. Aluminum fluoride will undergo an exothermic reaction with aluminum and oxygen. The heat released by the reaction can make the viscous molten slag become loose powder-like dry slag. During the formation of the dry slag, the wettability between the molten aluminum and the oxides in the aluminum slag becomes smaller, enabling the granular aluminum droplets mixed in the aluminum slag to break away and return to the melt, thereby reducing the amount of waste slag and improving the utilization rate of aluminum. Moreover, during the slag skimming process, the cover body 21 of the holding furnace is in a closed state, which can effectively reduce the air entering the holding furnace 2 and prevent the air mixed in during the slag skimming process from continuously oxidizing the surface of the molten metal, thus effectively reducing the amount of waste slag generated during the slag skimming process. In addition, since the slag skimming can be carried out without opening the cover body 21 of the holding furnace, the safety of the slag skimming operation can be higher.

[0056] The embodiment of the present application also discloses a device for reducing the generation amount of waste slag in the metal processing process.

[0057] Refer to Figure 1 and Figure 2 As shown in and, a device for reducing the generation amount of waste slag in the metal processing process includes the narrow-mouth melting furnace 1, the holding furnace 2, and the closed guiding trough 3 in the above technical solution. Among them, a narrow-mouth section 11 is provided at the port of the narrow-mouth melting furnace 1. The cross-section of the narrow-mouth section 11 is set as a rectangle. The narrow-mouth position mentioned in the above technical solution is located at this narrow-mouth section 11, and a melting furnace closed slag skimming unit is provided at the port of the narrow-mouth melting furnace 1. The holding furnace 2 is set as a quadrangular prism structure, and a holding furnace closed slag skimming unit is provided at the port of the holding furnace 2. By setting the narrow-mouth section 11 and keeping the liquid level in the narrow-mouth melting furnace 1 at the narrow-mouth section 11, the liquid surface area of the molten metal can be small, the area of the oxide layer generated is small, and the oxidation amount is small. Therefore, the generation amount of waste slag can be reduced. Setting the holding furnace 2 as a quadrangular prism structure enables its cross-section and the cross-section of the narrow-mouth section 11 to be both rectangles, so that the width of the rake head of the slag rake can be set to be the same as the width of the rectangular cross-section, facilitating the slag skimming operation.

[0058] Refer to Figure 2 and Figure 3The closed slag removal unit of the furnace in the equipment for reducing the amount of waste slag generated in the metal processing process of the present application includes a furnace cover body 12, a furnace flexible cover plate 13 arranged on the furnace cover body 12, a pair of furnace flexible cover plate retractors 14 arranged opposite to each other, and a furnace slag rake 15 arranged on the furnace flexible cover plate 13; the structure of the furnace flexible cover plate 13 is similar to that of the rolling door panel, and is made of high-temperature resistant metal material. Specifically, the furnace cover body 12 is provided with a furnace slag removal groove 121 extending along the length direction of the furnace cover body 12, and the two ends of the furnace flexible cover plate 13 are respectively connected to the corresponding furnace flexible cover plate retractors 14, and the structure of the furnace flexible cover plate retractors 14 is similar to the driving structure for driving the rolling door panel to be retracted and extended. When one of the furnace flexible cover plate retractors 14 reels the furnace flexible cover plate 13, the other will release the furnace flexible cover plate 13. A pair of relatively arranged furnace flexible cover plate guide grooves (not shown in the figure) may be further arranged on both sides of the furnace slag trough 121. The furnace flexible cover plate 13 between the two furnace flexible cover plate retractors 14 is arranged in the furnace flexible cover plate guide grooves. The furnace flexible cover plate guide grooves can guide the movement of the furnace flexible cover plate 13 and can also make the furnace flexible cover plate 13 abut against the furnace slag trough 121 to form a good coverage of the furnace slag trough 121 and prevent air from entering the narrow-mouth furnace 1 from the furnace slag trough 121 to oxidize the liquid metal and produce waste slag.

[0059] The slag rake 15 includes a rake head and a rake rod. The rake head of the slag rake 15 can be placed in the narrow-mouthed furnace 1. One end of the rake rod of the slag rake 15 is connected to the rake head, and the other end can pass through the furnace slag removal groove 121 and pass through the through-hole structure provided on the flexible cover plate 13 of the furnace, so that workers can control the up and down movement of the slag rake 15. In addition, the movement of the through-hole structure on the flexible cover plate 13 of the furnace (that is, the slag rake 15) can be achieved by controlling the flexible cover plate retractor 14 of the furnace, so that the slag rake 15 can be moved along the length direction of the flexible cover plate 13 of the furnace, so that the waste slag can be removed to the furnace threshold 16 provided at the port of the narrow-mouthed furnace 1. The above-mentioned design makes it possible for the slag rake 15 to move in the narrow-mouthed furnace 1 to collect waste slag without opening the furnace cover body 12, so as to avoid air from entering the narrow-mouthed furnace 1, causing oxidation of the liquid metal to produce waste slag, and to make the slag removal operation environment safer.

[0060] Reference Figure 1 and Figure 2, in the equipment for reducing the generation amount of waste slag in the metal processing process of the present application, the furnace sill 16 in the furnace extends away from the narrow-mouth furnace 1 to form a furnace flange platform structure. The furnace cover 12 cooperates with the furnace flange platform structure to form a furnace rake head passage suitable for the rake head of the furnace slag rake 15 to pass through. And a furnace rotating valve plate 161 is provided at the bottom of the furnace flange platform structure. When the furnace rotating valve plate 161 rotates upward to the first working position, it can invade into the interior of the furnace rake head passage until it can close the furnace rake head passage, so as to realize the seal between the furnace cover 12 and the port of the narrow-mouth furnace 1, ensuring that air is not easily or even will not enter the narrow-mouth furnace 1, thereby reducing or avoiding the oxidation of liquid metal to generate waste slag; when the furnace rotating valve plate 161 rotates downward to the second working position, it can form a furnace slag discharge port at the bottom of the furnace flange platform structure suitable for the rake head to be taken out downward, so that the waste slag can be discharged from the furnace slag discharge port. Since the size of the furnace slag discharge port is small and the opening time of the furnace slag discharge port during slag discharge is also short, the amount of air entering the narrow-mouth furnace 1 can be small, and the amount of oxide waste slag generated is small.

[0061] Furthermore, the furnace rotating valve plate 161 can be arranged at a position close to the connection between the furnace sill 16 and the port of the narrow-mouth furnace 1, so that the end of the furnace sill 16 (i.e., the furnace rake head passage) far from the narrow-mouth furnace 1 has a rake head accommodation cavity capable of accommodating the rake head of the furnace slag rake 15. Thus, during the slag skimming process, first keep the furnace rotating valve plate 161 flush with the bottom surface of the furnace flange platform structure, so that the furnace rotating valve plate 161 can block the furnace slag discharge port. When the furnace slag rake 15 moves until its rake head is in the rake head accommodation cavity, the furnace rotating valve plate 161 flips up to the first working position to block the furnace rake head passage, and at the same time opens the furnace slag discharge port, enabling the furnace slag rake 15 to be taken out downward from the furnace slag discharge port for slag discharge. The above design can make the time for air to enter the narrow-mouth furnace 1 shorter, achieving a better anti-oxidation and anti-slagging effect, and also enabling the furnace slag rake 15 not to be in the furnace chamber of the narrow-mouth furnace 1 during the heating process, so that the furnace slag rake 15 will not be corroded by metal and thermal corrosion.

[0062] Furthermore, a furnace slag-making agent feed port (not shown in the figure) and a furnace observation slot (not shown in the figure) can also be provided on the furnace cover 12 of the equipment for reducing the generation amount of waste slag in the metal processing process of the present application. Thus, the slag-making agent can be put into the furnace through the furnace slag-making agent feed port. The furnace observation slot can be designed along the length direction of the furnace cover 12 to be able to observe the surface of the entire liquid metal, and a high-temperature resistant transparent plate (such as a high-temperature resistant quartz plate) can be covered at the furnace observation slot to be able to observe the slag discharge situation and the slag skimming situation through the furnace observation slot.

[0063] Refer to Figure 4, at one end of the closed furnace guiding trough 3 in the device for reducing the generation amount of waste residue in the metal processing process of the present application, a furnace guiding trough inlet 31 is provided, so that it can be connected to the furnace discharging port at the bottom of the narrow-mouth furnace 1 through the furnace guiding trough inlet 31. The other end of the closed furnace guiding trough 3 is closed, and a furnace guiding trough outlet 32 is provided on the side wall near this end. The furnace guiding trough outlet 32 is arranged towards the ground and can be connected to the feeding port of the heat preservation furnace 2 through the furnace guiding trough outlet 32, so as to realize furnace guiding. Among them, a discharging port plugging member 17 is provided at the furnace discharging port, and after the liquid metal in the narrow-mouth furnace 1 reaches the required conditions, the discharging port plugging member 17 is pulled out for furnace guiding; the furnace guiding trough outlet 32 is arranged towards the ground and connected to the feeding port of the heat preservation furnace 2, so that the liquid metal in the closed furnace guiding trough 3 flows into the heat preservation furnace 2 in a subsurface flow manner. Therefore, even if the surface of the liquid metal in the closed furnace guiding trough 3 is oxidized, the subsurface flow manner can not damage the surface oxide layer, so that a large amount of oxide layer will not be continuously generated during the furnace guiding process, and thus the amount of waste residue generated can be reduced.

[0064] Refer to Figure 4 , the closed furnace guiding trough 3 in the device for reducing the generation amount of waste residue in the metal processing process of the present application further includes a plugging member extraction port 33 and a furnace guiding trough cover plate 34. A discharging port plugging member accommodating cavity is formed on the furnace guiding trough cover plate 34, and a through-hole structure is provided on the discharging port plugging member accommodating cavity. One end of the discharging port plugging member 17 is connected to one end of the discharging port plugging member connecting rod 18, and the other end of the discharging port plugging member connecting rod 18 can pass through the plugging member extraction port 33 and pass out from the through-hole structure on the discharging port plugging member accommodating cavity, so that the operator can pull the discharging port plugging member connecting rod 18 to pull out the discharging port plugging member 17 from the furnace discharging port, and after pulling out, the discharging port plugging member connecting rod 18 can be continuously pulled to move the discharging port plugging member 17 into the discharging port plugging member accommodating cavity, so as not to hinder furnace guiding. In addition, furnace guiding trough cover plate guiding grooves (not shown in the figure) can be provided on both sides of the plugging member extraction port 33, and the furnace guiding trough cover plate 35 is arranged in the furnace guiding trough cover plate guiding grooves, so that it can be close to or far from the furnace discharging port, so that the furnace guiding trough cover plate 35 can be close to the plugging member extraction port 33 to cover the plugging member extraction port 33 to prevent oxidation from forming waste residue; or be far from the plugging member extraction port 33 to facilitate observing or overhauling the inside of the closed furnace guiding trough 3 through the plugging member extraction port 33.

[0065] Refer to Figure 2 and Figure 5The closed slag removal unit of the insulation furnace in the equipment for reducing the amount of waste slag generated during metal processing of the present application includes an insulation furnace cover body 21, an insulation furnace flexible cover plate 22 arranged on the insulation furnace cover body 21, a pair of insulation furnace flexible cover plate retractors 23 arranged opposite to each other, and an insulation furnace slag rake 24 arranged on the insulation furnace flexible cover plate 22; the structure of the insulation furnace flexible cover plate 22 is the same as that of the above-mentioned melting furnace flexible cover plate 13, and the structure of the insulation furnace flexible cover plate retractor 23 is the same as that of the above-mentioned melting furnace flexible cover plate retractor 14; specifically, the insulation furnace cover body 21 is provided with an insulation furnace slag removal groove 211 extending along the length direction of the insulation furnace cover body 21, and the two ends of the insulation furnace flexible cover plate 22 are respectively connected to the corresponding insulation furnace flexible cover plate retractors 23, and the two When one of the insulation furnace flexible cover plate retractors 23 reels the insulation furnace flexible cover plate 22, the other will release the insulation furnace flexible cover plate 22. A pair of relatively arranged insulation furnace flexible cover plate guide grooves (not shown in the figure) can be further arranged on both sides of the insulation furnace slag trough 211. The insulation furnace flexible cover plate 22 between the two insulation furnace flexible cover plate retractors 23 is arranged in the insulation furnace flexible cover plate guide grooves. The insulation furnace flexible cover plate guide grooves can guide the movement of the insulation furnace flexible cover plate 22 and can also make the insulation furnace flexible cover plate 22 abut against the insulation furnace slag trough 211 to cover the insulation furnace slag trough 211 and prevent air from entering the insulation furnace 2 from the insulation furnace slag trough 211 to oxidize the liquid metal and produce waste slag.

[0066] The insulation furnace slag rake 24 also includes a rake head and a rake rod. The rake head of the molten furnace slag rake 24 can be placed in the insulation furnace 2. One end of the rake rod of the insulation furnace slag rake 24 is connected to the rake head, and the other end can pass through the insulation furnace slag removal groove 211 and pass through the through-hole structure provided on the insulation furnace flexible cover plate 22, so that the worker can control the upward movement of the insulation furnace slag rake 24, and the through-hole structure on the insulation furnace flexible cover plate 22 (that is, the insulation furnace flexible cover plate retractor 23) can be controlled to realize The slag rake 24 can be moved along the length direction of the insulating furnace flexible cover 22 to scrape the waste slag to the insulating furnace threshold 25 provided at the port of the insulating furnace 2; the above-mentioned design makes it unnecessary to open the insulating furnace cover 21 when the insulating furnace slag rake 24 moves in the insulating furnace 2 to collect the waste slag, so as to avoid air from entering the insulating furnace 2 and causing oxidation of the liquid metal to produce waste slag, and can make the slag scraping operation environment safer.

[0067] Reference Figure 1 and Figure 2, the thermal insulation furnace threshold 25 in the equipment for reducing the generation amount of waste slag in the metal processing process of the present application extends away from the thermal insulation furnace 2 to form a thermal insulation furnace flange platform structure. The thermal insulation furnace cover 21 cooperates with the thermal insulation furnace flange platform structure to form a melting furnace rake head passage suitable for the rake head of the thermal insulation furnace slag rake 24 to pass through. And a thermal insulation furnace rotating valve plate 251 is provided at the bottom of the thermal insulation furnace flange platform structure. When the thermal insulation furnace rotating valve plate 251 rotates upward to the first working position, it can intrude into the interior of the thermal insulation furnace rake head passage until it can seal the thermal insulation furnace rake head passage, so as to realize the seal between the thermal insulation furnace cover 21 and the port of the thermal insulation furnace 2, ensuring that air is not easily even will not enter the thermal insulation furnace 2, thereby reducing or avoiding the oxidation of liquid metal to generate waste slag; when the thermal insulation furnace rotating valve plate 251 rotates downward to the second working position, it can form a thermal insulation furnace slag discharge port suitable for the rake head to be taken out downward at the bottom of the thermal insulation furnace flange platform structure, so that the waste slag can be discharged from the thermal insulation furnace slag discharge port. Since the size of the thermal insulation furnace slag discharge port is small and the opening time of the thermal insulation furnace slag discharge port during slag discharge is also short, the amount of air entering the thermal insulation furnace 2 can be small, and the amount of oxide waste slag generated is small.

[0068] Further, the thermal insulation furnace rotating valve plate 251 can be arranged at a position close to the connection of the thermal insulation furnace threshold 25 and the port of the thermal insulation furnace 2, so that the end of the thermal insulation furnace threshold 25 (i.e., the thermal insulation furnace rake head passage) far from the thermal insulation furnace 2 has a rake head accommodating cavity capable of accommodating the rake head of the thermal insulation furnace slag rake 24. Thus, during the slag skimming process, first keep the thermal insulation furnace rotating valve plate 251 flush with the bottom surface of the thermal insulation furnace flange platform structure, so that the thermal insulation furnace rotating valve plate 251 can block the thermal insulation furnace slag discharge port. When the thermal insulation furnace slag rake 24 moves to the position where its rake head is in the rake head accommodating cavity, the thermal insulation furnace rotating valve plate 251 flips up to the first working position to block the thermal insulation furnace rake head passage, and at the same time opens the thermal insulation furnace slag discharge port, so that the thermal insulation furnace slag rake 24 can be taken out downward from the thermal insulation furnace slag discharge port for slag discharge. The above design can make the time for air to enter the thermal insulation furnace 2 shorter, achieving a better anti-oxidation and anti-slagging effect, and also enabling the thermal insulation furnace slag rake 24 not to be in the furnace chamber of the thermal insulation furnace 2 during the heating process, so that the thermal insulation furnace slag rake 24 will not be corroded by metal and thermal corrosion.

[0069] In addition, a thermal insulation furnace slag-making agent feed port (not shown in the figure) and a thermal insulation furnace observation slot (not shown in the figure) are also provided on the thermal insulation furnace cover 21, so that the slag-making agent can be put into the furnace through the thermal insulation furnace slag-making agent feed port. The thermal insulation furnace observation slot can be designed along the length direction of the thermal insulation furnace cover 21 to observe the surface of the entire liquid metal, and a high-temperature resistant transparent plate (such as a high-temperature resistant quartz plate) can be covered at the thermal insulation furnace observation slot to observe the slag discharge situation and slag skimming situation through the thermal insulation furnace observation slot.

[0070] The implementation principle of the device for reducing the amount of waste slag generated during metal processing in the embodiment of the present application is as follows: the furnace cover 12 and the insulation cover 21 are configured to have a flexible cover plate, a pair of flexible cover plate retractors arranged opposite to each other, and a slag rake arranged on the flexible cover plate. Specifically, the flexible cover plate can abut against the slag removal groove to cover the slag removal groove to prevent air from entering the narrow-mouthed furnace 1 or the insulation furnace 2 from the slag removal groove to cause oxidation of the liquid metal to produce waste slag; the flexible cover can be realized by controlling the flexible cover retractor The through-hole structure on the plate (that is, the slag rake) can be moved along the length direction of the flexible cover plate, so that the waste slag can be scraped to the furnace threshold provided at the port of the narrow-mouthed melting furnace 1 and the port of the insulation furnace 2, so that the slag rake does not need to open the furnace cover 12 or the insulation furnace cover 21 when moving in the narrow-mouthed melting furnace 1 and the insulation furnace 2 to collect the waste slag, so as to prevent air from entering the narrow-mouthed melting furnace 1 or the insulation furnace 2, causing oxidation of the liquid metal to produce waste slag, and can make the slag scraping operation environment safer.

[0071] In addition, the furnace threshold extends in a direction away from the narrow-mouthed furnace 1 or the insulating furnace 2 to form a flange platform structure, and the furnace cover 12 and the insulating cover 21 can cooperate with the flange platform structure to form a rake head channel suitable for the rake head of the slag rake to pass through, and a rotating valve plate is provided at the bottom of the flange platform structure, and the furnace rake head channel can be closed by rotating the furnace rotating valve plate to ensure that air is not easy or even does not enter the narrow-mouthed furnace 1 or the insulating furnace 2, thereby reducing or avoiding the oxidation of liquid metal to produce waste slag; or a slag outlet suitable for the rake head to escape downward is formed at the bottom of the flange platform structure, so that the waste slag can be discharged from the slag outlet. Since the size of the slag outlet is small and the slag outlet is open for a short time during slag discharge, the amount of air entering the narrow-mouthed furnace 1 or the insulating furnace 2 can be reduced, and the amount of oxide waste slag generated can be reduced.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for reducing the amount of waste slag generated during metal processing, Features: The invention comprises a narrow-mouth melting furnace (1), a heat-insulating furnace (2) and a closed furnace guide groove (3); a narrow-mouth section (11) is provided at the port of the narrow-mouth melting furnace (1); the cross section of the narrow-mouth section (11) is rectangular; the narrow mouth is located at the narrow-mouth section (11); a closed furnace slag removal unit is provided at the port of the narrow-mouth melting furnace (1); the heat-insulating furnace (2) is configured as a quadrangular prism structure; a closed furnace slag removal unit is provided at the port of the heat-insulating furnace (2); the closed furnace slag removal unit comprises a melting furnace cover (12), a melting furnace cover (12) and a melting furnace cover (12) disposed on the melting furnace cover (12); A furnace flexible cover plate (13), a pair of furnace flexible cover plate retractors (14) arranged opposite to each other, and a furnace slag rake (15) arranged on the furnace flexible cover plate (13); the furnace cover body (12) is provided with a furnace slag removal groove (121) extending along the length direction of the furnace cover body (12); the furnace flexible cover plate (13) is provided with a through-hole structure; the furnace slag rake (15) includes a rake head and a rake rod; the rake head of the furnace slag rake (15) can be placed in the narrow-mouth furnace (1); one end of the rake rod of the furnace slag rake (15) is connected to the rake The other end of the head connection can pass through the furnace slag removal groove (121) and pass through the through-hole structure on the furnace flexible cover plate (13), and the two ends of the furnace flexible cover plate (13) are connected to the corresponding furnace flexible cover plate retractor (14), so that the furnace slag rake (15) can be controlled by the furnace flexible cover plate retractor (14) to move along the length direction of the furnace flexible cover plate (13) to remove the waste slag to the furnace threshold (16) provided at the port of the narrow-mouthed furnace (1), and the furnace threshold (16) moves away from the narrow-mouthed furnace (1). The furnace cover (12) is extended in the direction of the furnace mouth (1) to form a furnace flange platform structure, the furnace cover (12) cooperates with the furnace flange platform structure to form a furnace rake head channel suitable for the rake head of the furnace slag rake (15) to pass through, and a furnace rotating valve plate (161) is provided at the bottom of the furnace flange platform structure. When the furnace rotating valve plate (161) is in the first working position, the furnace rake head channel can be closed, and when it is in the second working position, a furnace slag outlet suitable for the rake head to escape downward can be formed at the bottom of the furnace flange platform structure.

2. The device for reducing the amount of waste slag generated during metal processing according to claim 1, Features: The furnace cover (12) is also provided with a furnace slag-forming agent feed port and a furnace observation slot, and the furnace observation slot is covered with a high-temperature resistant transparent plate.

3. The device for reducing the amount of waste slag generated during metal processing according to claim 1, Features: One end of the closed guiding furnace trough (3) is provided with a guiding furnace trough inlet (31) for connecting to the furnace discharge port at the bottom of the narrow-mouth melting furnace (1) via the guiding furnace trough inlet (31). A discharge port plugging member (17) is provided at the furnace discharge port. The other end of the closed guiding furnace trough (3) is closed, and a guiding furnace trough outlet (32) is provided on the side wall near this end. The guiding furnace trough outlet (32) is arranged facing the ground and is connected to the feed port of the holding furnace (2).

4. The equipment for reducing the generation amount of waste residue in the metal processing process according to claim 3, characterized in that: The closed guiding furnace trough (3) further includes a plugging member extraction port (33) and a guiding furnace trough cover plate (34). A discharge port plugging member accommodation cavity is formed on the guiding furnace trough cover plate (34). A through-hole structure is provided on the discharge port plugging member accommodation cavity. One end of the discharge port plugging member (17) is connected to one end of a discharge port plugging member connecting rod (18), and the other end of the discharge port plugging member connecting rod (18) can pass through the plugging member extraction port (33) and penetrate out from the through-hole structure on the discharge port plugging member accommodation cavity.

5. The equipment for reducing the generation amount of waste residue in the metal processing process according to claim 1, characterized in that: The holding furnace closed slag skimming unit includes a holding furnace cover body (21), a holding furnace flexible cover plate (22) provided on the holding furnace cover body (21), a pair of relatively arranged holding furnace flexible cover plate retracting and extending devices (23), and a holding furnace slag rake (24) provided on the holding furnace flexible cover plate (22); A holding furnace slag skimming trough (211) extending along the length direction of the holding furnace cover body (21) is provided on the holding furnace cover body (21). A through-hole structure is provided on the holding furnace flexible cover plate (22); The holding furnace slag rake (24) includes a rake head and a rake rod. The rake head of the holding furnace slag rake (24) can be placed inside the holding furnace (2). One end of the rake rod of the holding furnace slag rake (24) is connected to the rake head, and the other end can pass through the holding furnace slag skimming trough (211) and penetrate out from the through-hole structure on the holding furnace flexible cover plate (22); Both ends of the holding furnace flexible cover plate (22) are connected to the holding furnace flexible cover plate retracting and extending device (23) so as to be able to control the holding furnace slag rake (24) to move along the length direction of the holding furnace flexible cover plate (22) via the holding furnace flexible cover plate retracting and extending device (23), and skim the waste residue to the holding furnace sill (25) provided at the port of the holding furnace (2).

6. The equipment for reducing the generation amount of waste residue in the metal processing process according to claim 5, characterized in that: The furnace threshold (25) of the holding furnace extends away from the holding furnace (2) to form a flange platform structure of the holding furnace. The holding furnace cover body (21) cooperates with the flange platform structure of the holding furnace to form a holding furnace rake head passage suitable for the rake head of the holding furnace slag rake (24) to pass through. A holding furnace rotary valve plate (251) is provided at the bottom of the flange platform structure of the holding furnace. When the holding furnace rotary valve plate (251) is in the first working position, it can close the holding furnace rake head passage, and when it is in the second working position, it can form a slag discharge opening of the holding furnace suitable for the rake head to escape downward at the bottom of the flange platform structure of the holding furnace; A slag-making agent feeding port and an observation tank of the holding furnace are further provided on the holding furnace cover body (21), and a high-temperature resistant transparent plate is covered at the observation tank of the holding furnace.

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