Recycling equipment for one-stage smelting of waste steel secondary material in refining furnace

Abstract

The utility model provides recovery processing equipment for one-stage smelting of waste steel secondary materials in a refining furnace, which comprises the refining furnace, a steel tapping hole arranged at the bottom of the refining furnace, a slag discharge hole arranged at the selected height of the refining furnace, and an electrode bar arranged at the high position of the refining furnace; the dust collecting cover is arranged above the refining furnace; the dust collection structure is arranged above the refining furnace; the waste steel secondary material bin is provided with a feeding piece connected with the waste steel secondary material bin and a movable feeding pipe connected with the feeding piece and the refining furnace, and the movable feeding pipe can move between the feeding piece and the refining furnace in a reciprocating mode; and the component adjusting bin is connected with the refining furnace. The closed dust collection cover is arranged above the refining furnace, material damage caused by splashing of molten steel formed by melting waste steel secondary materials can be prevented, air pollution caused by scattering of flying dust formed at high temperature can be prevented, meanwhile, the arrangement position of the dust collection structure is heightened, excessive and high-temperature flying dust can be prevented from being sucked in, and the service life can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of recovery processing equipment of scrap steel secondary material one-stage smelting in refining furnace, in particular to the equipment that can use refining furnace one-stage smelting to recycle and process, for example, planing chip, turning chip, slag iron (ball mill water washing material), rust, flame cutting chip, grinding chip, peeling material, numerical control (CNC) planing chip and similar metal processing waste etc.The weight proportion of scrap steel secondary material added in refining furnace can be more than 50% to 100% complete scrap steel secondary material is added. BACKGROUND

[0002] Traditional crude iron ore (iron ore) uses electric arc furnace to smelt. In addition to crude iron ore, steel mills will also use the double-furnace smelting operation of electric furnace (or converter) and refining furnace to re-obtain high-quality steel materials from the large amount of scrap steel generated. The scrap steel is melted into liquid high-temperature molten steel in the electric furnace, and after tapping into the ladle, it is sent to the refining furnace for further refining treatment. The molten steel is usually kept in the refining furnace to adjust the composition and pouring temperature, achieving the effect of improving the quality of the steel blank, such as JP7266938B, CN113652523B, CN117587186A, etc. The double-furnace smelting technology is disclosed. Among them, scrap steel is classified as high-quality grade high scrap, such as planing chip, turning chip, slag iron (ball mill water washing material), rust, flame cutting chip, grinding chip, peeling material, numerical control (CNC) planing chip and similar processed scrap, etc. containing a large amount of non-metallic, oil, and fine scrap, etc. The greater the difference in grade, the greater the price difference.

[0003] In double-furnace smelting, in order to improve the utilization rate of scrap steel, scrap steel is further added in the refining furnace, such as CN108660287A, CN117431365A, CN117778670A, CN114015836B, CN221094200U, etc. The above-mentioned cases disclose that the scrap steel added in the refining furnace is, for example, CN108660287A discloses using steel bar cuttings (secondary scrap after non-mechanical processing) with a length ≤100mm and a diameter ≤40mm, CN117431365A discloses using large-tonnage scrap steel (secondary scrap after non-mechanical processing) such as steel plate edge wire cuttings, tailings, and tundish residual steel, etc., and CN114015836B discloses that the amount of scrap steel added in the refining furnace is 100kg / ton of steel to 120kg / ton of steel.

[0004] The finished steel enters the processing plant for subsequent processing. Among them, the waste materials (scrap steel) generated in the process of metal processing, such as shavings, turning chips, slag iron (ball mill water washing material), rust, flame cutting chips, grinding chips, peeled material, numerical control (CNC) shavings and similar processed waste materials, although their composition is the same as the raw material, but because of the adhesion to the turning oil and other lubricants in the processing process, or the poor storage environment after processing, it is easy to oxidize, with the characteristics of fine, high oxygen, high impurities, etc. Therefore, these scrap steels are different from simple recycled scrap steels or large block scrap steels, which are primary materials, and belong to secondary scrap steels (or referred to as secondary materials). The secondary scrap steel and the high-grade scrap steel have a significant price difference, but because of the unstable outflow or recovery rate in the electric furnace (or converter), only a limited amount of secondary scrap steel can be added. Even due to the factors such as blowing or dust collection of the furnace operation characteristics, the secondary scrap steel cannot be used.

[0005] If the secondary scrap steel is to be regenerated as a usable resource, the following methods are currently used:

[0006] 1. Pressing and forging method: as described in TW181997B (Taiwanese patent) and GB1313545A, the secondary scrap steel is ground and homogenized, then pressed into a metal container, forged into a billet by heating and pressing, and a reducing atmosphere is introduced to reduce the metal oxides therein. CN116536535A is to directly press the secondary scrap steel into a block by a hydraulic press and then melt it into molten steel in the furnace. The main problem of this method is low work efficiency.

[0007] 2. Fuel furnace (electric furnace) melting method: as described in CN208733152U, the secondary scrap steel is added with coal in the fuel furnace to heat together into molten steel, which can reduce the metal oxides in the secondary scrap steel by carbon thermal reduction. The main problem of this method is that (1) the fuel furnace is the first melting stage of metal smelting. In order to obtain a large amount of preliminary molten steel, the fuel furnace has a large volume and a wide transverse width. The upper half of the furnace cover and the furnace wall has a water cooling mechanism, and in order to promote the melting of the incoming material as soon as possible, it has the characteristics of high voltage input. In the melting process, the secondary scrap steel is easily adhered to the furnace body due to spattering, and a large amount of dust is generated in the melting process. The strong dust collection system has strong dust collection characteristics, which causes the secondary scrap steel to be lost in the form of slag and dust collection ash, resulting in serious loss of secondary scrap steel. In the first stage of melting in the fuel furnace, steps such as oxygen blowing desiliconization and dephosphorization are required. Therefore, the fuel furnace is in an oxidizing environment, which is not conducive to the effective reduction and deoxidation of the fine and high-oxidized secondary scrap steel. If the target yield or precious metal recovery rate is to be achieved, high-priced raw materials (high-grade and high-quality scrap steel) are required. Therefore, the maximum amount of secondary scrap steel added in the fuel furnace melting method is usually not more than 30% by weight. (2) The use of petrochemical fuel causes air pollution problems due to carbon emissions. CN113430449B discloses adding 10% to 40% of low-chromium secondary material (secondary material) in the electric arc furnace for double-furnace steelmaking.

[0008] 3. Intermediate frequency furnace smelting method: as described in CN111575440A, CN001040393A, the scrap secondary material is removed after cleaning, drying and removing water, etc. Impurities, then add carbonizer to the intermediate frequency furnace (induction furnace) for reduction refining, and after oxygen blowing desulfurization and dephosphorization, the furnace is discharged. The main problems of this method are (1) the smelting process is easy to splash, so that the scrap secondary material is lost in the form of slag; (2) physical or chemical bridging may cause steel penetration and gas explosion, so impurities must be removed, otherwise uneven heating may cause the intermediate frequency furnace to explode and cause work safety hazards, and the process of removing impurities may use chemicals such as alkali, which has certain harmfulness to the environment; (3) the volume of the intermediate frequency furnace is small, and the amount of one-time smelting is small, and the narrow inlet of the intermediate frequency furnace makes the work safety risk high, so the scrap secondary material needs to be pretreated.

[0009] The above-mentioned various scrap secondary material recycling methods have the problems described above, and the treatment amount of scrap secondary material is limited, and the valuable elements contained in the secondary material scrap steel, such as stainless steel and high alloy steel secondary material, cannot be efficiently deformed and recycled. Practical new type content

[0010] In order to effectively recycle and process scrap secondary material, the purpose of the present application is to provide a scrap secondary material one-stage smelting recycling equipment in a refining furnace.

[0011] The present application provides a scrap secondary material one-stage smelting recycling equipment (i.e. a refining furnace equipment) in a refining furnace, which comprises:

[0012] A refining furnace is provided with a tapping hole at the bottom of the furnace, and a slagging hole is provided at a selected height of the furnace. A dust collecting hood is provided above the refining furnace. A dust collecting structure is provided above the dust collecting hood. A scrap secondary material bin is connected to the scrap secondary material bin by a vibrating feeder, and a movable feeding pipe is connected to the vibrating feeder and the refining furnace. The movable feeding pipe can reciprocate between the vibrating feeder and the refining furnace. A component adjusting bin is connected to the refining furnace.

[0013] Further, the scrap secondary material is alloy steel scrap secondary material.

[0014] Further, the dust collecting structure is arranged above the dust collecting cover, thereby increasing the arrangement position of the dust collecting structure, the flying dust is cooled quickly without using water cooling mechanism, the dust collecting structure can avoid sucking too much and high temperature flying dust, prolong the service life of the dust collecting structure, the height of the general dust collecting cover is close to the height of the electrode rod, the dust collecting structure is arranged above the dust collecting cover, for example, the height of the dust collecting structure is controlled to be 1.5 times to 3 times of the height of the electrode rod, or the height of the dust collecting structure is controlled to be about 2 meters to 6 meters higher than the height of the electrode rod, so that the above-mentioned effect is achieved, therefore, as long as the arrangement height of the dust collecting structure is increased, even if the dust collecting structure is not arranged above the dust collecting cover, it also belongs to the protection scope of the utility model.

[0015] Further, the feeding member is provided with one of a vibrating mechanism, a rolling mechanism, a disturbing mechanism or an agitating mechanism, the waste steel secondary material is continuously fed and the feeding position of the waste steel secondary material is adjusted to ensure the feeding effect through the vibration / rolling / agitation / disturbing and movement of the feeding member and the movable feeding pipe.

[0016] Further, the waste steel secondary material is put into the waste steel secondary material bin, and the component adjusting material is put into the component adjusting bin.

[0017] Further, the slag discharge port can discharge the molten steel with more impurities above the selected height in the refining furnace.

[0018] Further, the slag discharge port can discharge the molten steel with more impurities above the selected height in the refining furnace.

[0019] Further, the furnace body of the refining furnace is made of air permeable bricks, and the flowing air can oxidize and remove impurities in the refining furnace, for example, oxidize and remove phosphorus.

[0020] Further, different components of molten steel can be added in the refining furnace to produce different components of alloy steel.

[0021] Further, the weight proportion of the waste steel secondary material added in the refining furnace is between 50% and 100%, and then the waste steel secondary material is melted in the refining furnace; the reducing agent is added in the refining furnace, so that the waste steel secondary material is reduced and deoxidized in the refining furnace to become process molten steel; wherein the recovered waste steel secondary material is not limited to steel type.

[0022] The reducing agent includes adding coke in the refining furnace, or adding silicon and lime in the smelting process.

[0023] The utility model also provides a kind of recovery processing equipment of waste steel secondary material in refining furnace one-stage smelting, it is characterized in that, including:

[0024] A refining furnace, a tapping hole is arranged at the bottom of the refining furnace, a slagging hole is arranged at a selected height of the refining furnace, an electrode rod is arranged at a high position of the refining furnace, and the furnace body of the refining furnace is made of air permeable bricks;

[0025] A dust collecting cover is arranged above the refining furnace;

[0026] A dust collecting structure is arranged above the refining furnace, and the dust collecting structure is arranged at a position higher than 1.5 to 3 times the height of the electrode rod, or about 2 to 6 meters higher than the height of the electrode rod;

[0027] A scrap steel secondary material bin is connected with a feeding member, and a movable feeding pipe is connected between the feeding member and the refining furnace, the feeding member is provided with one of a vibrating mechanism, a rolling mechanism, a disturbing mechanism or a stirring mechanism, and the movable feeding pipe can reciprocate between the feeding member and the refining furnace;

[0028] A component adjusting bin is connected with the refining furnace.

[0029] The following effects can be achieved according to the above technical features:

[0030] 1. The utility model uses a refining furnace one-stage smelting to recycle and process scrap steel secondary materials, the refining furnace one-stage smelting directly feeds the scrap steel secondary materials into the refining furnace for smelting, and high proportion of valuable metals can be recycled and directly become process molten steel meeting quality requirements after smelting in the refining furnace, the scrap steel secondary materials fed into the refining furnace can be more than 50% in weight proportion, and even 100% of the scrap steel secondary materials can be completely fed into the refining furnace for smelting and recycling. The utility model can effectively eliminate the scrap steel secondary materials derived from product production in the city, and can produce high-value steel by using low-cost scrap steel secondary materials, and has the characteristics of city steelmaking.

[0031] 2. The fuel furnace (electric furnace) has a large volume and a wide transverse width, the upper half of the furnace cover and the furnace wall is provided with a water cooling mechanism, and in order to promote the incoming materials to melt as soon as possible, the fuel furnace (electric furnace) has the characteristics of high voltage and internal oxidation atmosphere, so that the splashing in the smelting process is obvious and a large amount of dust is generated, and a powerful dust extraction system is provided, and the fine scrap steel secondary materials are easily extracted and lost. Compared with the fuel furnace (electric furnace) smelting method, the refining furnace has a small volume and a slender shape, can be sealed to achieve a reducing atmosphere (+ reducing material) environment, and has no water cooling in the production process, so the splashing is weak and generally does not need a powerful dust extraction (and the dust collecting structure of the utility model is arranged higher), so the utility model smelts the scrap steel secondary materials in the refining furnace in one stage, and adds coke or reduces and deoxidizes by adding silicon and lime and other reducing agents in the smelting process, and the reducing environment in the refining furnace is a reducing atmosphere, which can obtain a high recovery rate of valuable metals.

[0032] 3. Compared with the intermediate frequency furnace smelting method, the waste steel secondary material is one-stage smelted in the refining furnace, and a reducing process is performed by adding coke or reducing agents such as silicon and lime during the smelting process, so that a larger amount of waste steel secondary material can be recycled and processed at one time, and the process of removing oil stains / impurities is not required.

[0033] 4. The waste steel secondary material for one-stage smelting and recycling in the refining furnace is not limited to steel types, such as waste steel secondary material of carbon steel or alloy steel, and is particularly suitable for recycling of high-value alloy steel such as 304, 316 stainless steel.

[0034] 5. The closed dust collecting cover is arranged above the refining furnace, which can prevent the molten steel of the waste steel secondary material from splashing and causing material loss, and prevent the flying dust formed by high temperature from scattering and causing air pollution. By arranging the position of the dust collecting structure, such as arranging the dust collecting structure above the dust collecting cover, the flying dust is cooled quickly without using a water cooling mechanism, so that the dust collecting structure can avoid inhaling too much and high-temperature flying dust, and the service life of the dust collecting structure can be prolonged.

[0035] 6. Since the refining furnace is generally used for the second-stage smelting of the metal smelting process, the purpose is to heat or refine the molten steel of the first-stage smelting of the fuel furnace to obtain the required steel type, and the volume is smaller than the fuel furnace, and the waste steel secondary material with uneven shape may be stuck in the material inlet. The feeding member and the movable feeding pipe are used to vibrate / roll / agitate / disturb and move the feeding, so as to achieve the purpose of continuous feeding of the waste steel secondary material, and the feeding position of the waste steel secondary material can be adjusted to ensure that the material is fed.

[0036] 7. The steel type for metal processing to generate cutting chips is limited, and the composition of the molten steel is affected by the feeding, so the double bins of the waste steel secondary material bin and the composition adjusting bin are arranged, and the composition adjusting material such as chromium and manganese is fed according to the composition requirement of the required molten steel, so as to increase the flexibility of the molten steel composition.

[0037] 8. The steel outlet is arranged at the bottom of the refining furnace, so that the molten steel can be discharged from the bottom of the refining furnace, and the effect of slag-free tapping can be achieved. The slag outlet is arranged at a selected height of the refining furnace, and the molten steel with more impurities can be discharged.

[0038] 9. The furnace body of the refining furnace is made of air permeable bricks, and the air flow can oxidize and remove impurities in the refining furnace, such as oxidizing and removing phosphorus.

[0039] 10. Adding molten steel with different compositions in the refining furnace can produce alloy steel with different compositions, and also can reduce the use of alloy. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is a schematic diagram of the refining furnace equipment of the utility model.

[0041] Figure 2 A flow chart of the recycling process of the one-stage smelting of the scrap secondary material in the refining furnace equipment of the present application.

[0042] Reference numerals: 1 - refining furnace; 11 - tapping hole; 12 - slagging hole; 13 - electrode rod; 2 - dust collecting hood; 3 - dust collecting structure; 4 - scrap secondary material bin; 5 - feeding member; 6 - movable feeding pipe; 7 - component adjusting bin; 8 - trolley; A - molten steel. DETAILED DESCRIPTION

[0043] The following described embodiments are only auxiliary to illustrate the recycling equipment (refining furnace equipment) of the one-stage smelting of the scrap secondary material in the refining furnace of the present application, and are not used to limit the present application. Among them, the scrap secondary material refers to the waste material after metal processing, such as shavings, turning chips, slag iron (ball milling water washing material), rust, flame cutting chips, grinding chips, skinned material, numerical control (CNC) shavings, etc.

[0044] Referring to Figure 1 The refining furnace equipment of the present embodiment includes: a refining furnace 1, a tapping hole 11 with a sliding door is arranged at the bottom of the refining furnace 1, a slagging hole 12 is arranged at a selected height of the refining furnace 1, and an electrode rod 13 for heating is arranged at the upper half of the refining furnace 1. A dust collecting hood 2 is arranged above the refining furnace 1. A dust collecting structure 3 is arranged above the dust collecting hood 2. Specifically, the arrangement position of the dust collecting structure 3 is increased, for example, the height of the dust collecting structure 3 can be controlled to be between about 1.5 times and 3 times of the height of the electrode rod 13, or at least between about 2 meters and 6 meters of the height of the electrode rod 13. A scrap secondary material bin 4 has a feeding member 5 connected to the scrap secondary material bin 4, and a movable feeding pipe 6 connected between the feeding member 5 and the refining furnace 1. The feeding member 5 is provided with a vibrating mechanism, a rolling mechanism, a disturbing mechanism or a stirring mechanism. The movable feeding pipe 6 can reciprocate between the feeding member 5 and the refining furnace 1. A component adjusting bin 7 is connected to the refining furnace 1. A trolley 8 is used to carry the refining furnace 1, and the setting position of the refining furnace 1 can be easily changed by the trolley 8.

[0045] Referring to Figure 2 When performing one-stage smelting recycling of scrap secondary material, scrap secondary material with a weight ratio of between 50% and 100% is added to the refining furnace 1, and then the scrap secondary material is melted in the refining furnace 1. Reducing agent is added to the refining furnace 1 to reduce and deoxidize the scrap secondary material in the refining furnace 1 to become process molten steel A. Among them, the recycling of scrap secondary material is not limited to steel grade, for example, scrap secondary material of carbon steel or alloy steel can be used, and is particularly suitable for recycling of high value alloy steel such as 304, 316 stainless steel.

[0046] The embodiment directly feeds the scrap steel secondary material from the scrap steel secondary material bin 4 without pre-removing oil stains / impurities from the scrap steel secondary material, and through the vibration mechanism, rolling mechanism, disturbance mechanism or stirring mechanism of the feeding member 5 and the moving feeding pipe 6, vibration / rolling / stirring / disturbance and moving feeding can be performed to achieve the purpose of continuous feeding of the scrap steel secondary material, and the feeding position of the scrap steel secondary material can be adjusted to ensure that the scrap steel secondary material is indeed fed into the refining furnace 1 and does not get stuck in the feeding port of the refining furnace 1. After the scrap steel secondary material is completely fed, the electrode rod 13 is used to heat and melt the scrap steel secondary material into molten steel A. In the refining furnace 1, coke is added in the smelting process or silicon and lime are added as reducing agents in the smelting process. The splashed molten steel A can be blocked by the dust hood 2 to prevent the splashing of the molten steel A from the scrap steel secondary material from causing material loss. The dust hood 2 can also prevent the scattering of flying dust caused by high temperature from causing air pollution. The dust collection structure 3 is arranged above the dust hood 2, so it can be arranged at a higher position without using a water cooling mechanism due to the fast cooling characteristics of the flying dust. The dust collection structure 3 also avoids inhaling too much and high-temperature flying dust, thereby prolonging the service life of the dust collection structure 3. The body of the refining furnace 1 is made of air brick, and the flowing air can oxidize and remove impurities in the molten steel A in the refining furnace 1, such as oxidizing and removing phosphorus. The steel type used for metal processing to produce cutting chips is limited, and the composition of the molten steel A is affected by the feed material. The composition adjustment bin 7 can input composition adjustment materials such as chromium and manganese according to the composition requirements of the desired molten steel A, thereby increasing the flexibility of the composition of the molten steel A. The scrap steel secondary material smelting process can also produce alloy steel of different compositions by adding molten steel A of different compositions in the refining furnace 1. After the scrap steel secondary material is melted into molten steel A, the slag outlet 12 can remove the molten steel A with more impurities such as floating solid oxides above a selected height in the refining furnace 1 after smelting, thereby shortening the operation time, and then the molten steel can be discharged through the tapping hole 11 at the bottom of the refining furnace 1, thereby achieving the effect of slag-free tapping.

[0047] Please refer to Table 1 below. In this embodiment, scrap steel secondary material of 304, 310, 316, T91 and other steel types is used for testing, wherein the scrap steel secondary material is fed in a shaving form, and the input ratio is 100% using only scrap steel secondary material. After one-stage smelting and recycling treatment in the refining furnace, it is found that the recycling yield of molten steel is 91.7% to 99.3%, and the steel type can have a high yield of more than 90%.

[0048] Table 1

[0049]

[0050]

[0051] Please refer to Table II and Table III below for further comparison of (1) the molten steel yield rate of the primary material of scrap steel smelted by the fuel furnace (electric furnace) of the conventional steel mill, (2) the molten steel yield rate of the secondary material of scrap steel recycling treatment by the fuel furnace (electric furnace) smelting method of the prior art, (3) the estimated molten steel yield rate of the secondary material of scrap steel recycling treatment by the fuel furnace (electric furnace) smelting method of the prior art to 100%, and (4) the molten steel yield rate of the secondary material of scrap steel recycling treatment by the refining furnace one-stage smelting of the present application, YS and YT in Table III are the plant numbers of the applicant. As can be seen from Table II and Table III, the molten steel yield rate of the secondary material of scrap steel recycling treatment by the fuel furnace (electric furnace) smelting method of the prior art is lower than that of the primary material of scrap steel smelted by the fuel furnace (electric furnace) of the conventional steel mill, and the molten steel yield rate of the secondary material of scrap steel recycling treatment by the fuel furnace (electric furnace) smelting method of the prior art to 100% is even lower. Therefore, as described in the prior art, when the secondary material of scrap steel is recycled and treated by the fuel furnace (electric furnace) smelting method, the input rate of the secondary material of scrap steel is usually not more than 30% by weight; but when the secondary material of scrap steel is recycled and treated by the refining furnace one-stage smelting of the present application, the molten steel yield rate can even be higher than that of the primary material of scrap steel smelted by the fuel furnace (electric furnace) of the conventional steel mill. In this way, the present application can not only effectively dehydrogenate the secondary material of scrap steel, but also significantly reduce the production cost of molten steel due to the large amount of secondary material of scrap steel used, compared with the production cost of the conventional production method using raw material ore or primary material.

[0052] Table II

[0053]

[0054] Table III

[0055]

[0056]

[0057] The recycling treatment equipment of the secondary material of scrap steel by the refining furnace one-stage smelting of the present application is not disclosed by the prior art. Compared with the prior art which can only recycle and treat less than 30% by weight of the secondary material of scrap steel each time, the recycling treatment of the refining furnace one-stage smelting of the present application can add a high proportion (more than 50% by weight, even 100% completely) of the secondary material of scrap steel in the refining furnace, and obtain a high recovery rate of precious metals after recycling and treatment, which has unexpected effects and thus the present application has progressiveness. Furthermore, the refining furnace one-stage smelting recycling treatment of a high proportion of the secondary material of scrap steel is also not used by the steel industry, so it overcomes the technical prejudice and solves the long-standing problem of difficult treatment of the secondary material of scrap steel, which meets the auxiliary judgment progressiveness factor.

[0058] From the above description of the embodiments, the operation, use and effects of the utility model can be fully understood, and the above embodiments are only the preferred embodiments of the utility model, and should not limit the range of the utility model implementation, that is, any simple equivalent changes and modifications according to the content of the utility model are within the scope of the utility model.

Claims

1. A recycling and processing device for secondary scrap steel materials in a one-stage smelting process in a refining furnace, characterized in that, The invention includes: a refining furnace, a tapping hole is arranged at the bottom of the refining furnace, a slagging hole is arranged at a selected height of the refining furnace, and an electrode rod is arranged at a high position of the refining furnace; a dust collecting cover arranged above the refining furnace; a dust collecting structure arranged above the refining furnace; a scrap steel secondary material bin, a feeding member is connected to the scrap steel secondary material bin, and a movable feeding pipe is connected between the feeding member and the refining furnace, and the movable feeding pipe can reciprocate between the feeding member and the refining furnace; a component adjusting bin connected to the refining furnace.

2. The scrap steel secondary material one-stage smelting recycling treatment apparatus according to claim 1, characterized by, The scrap steel secondary material is alloy steel scrap steel secondary material.

3. The scrap steel secondary material one-stage smelting recycling treatment apparatus according to claim 1, characterized by, The furnace body of the refining furnace is made of air permeable bricks, and the convection air can oxidize and remove impurities in the refining furnace.

4. The scrap steel secondary material one-stage smelting recycling treatment apparatus according to claim 1, characterized by, The feeding member is provided with one of a vibrating mechanism, a rolling mechanism, a disturbing mechanism or a stirring mechanism.

5. The scrap steel secondary material one-stage smelting recycling treatment apparatus according to claim 1, characterized by, The dust collecting structure is arranged at a position higher than 1.5 to 3 times the height of the electrode rod, or 2 to 6 meters higher than the height of the electrode rod.

6. The scrap steel secondary material one-stage smelting recycling treatment apparatus according to claim 1, characterized by, The scrap steel secondary material is added to the refining furnace in a weight ratio of 50% to 100%, and then the scrap steel secondary material is melted in the refining furnace; a reducing agent is added to the refining furnace to reduce the oxygen in the scrap steel secondary material in the refining furnace to become process molten steel; wherein the scrap steel secondary material recovered and processed is not limited to a steel grade; wherein the reducing agent includes adding coke in the refining furnace, or adding silicon and lime during the smelting process.

7. A scrap recycling plant for one-stage smelting of scrap in a refining furnace, characterized in that The invention includes: a refining furnace, a tapping hole is arranged at the bottom of the refining furnace, a slagging hole is arranged at a selected height of the refining furnace, and an electrode rod is arranged at a high position of the refining furnace, and the furnace body of the refining furnace is made of air permeable bricks; a dust collecting cover arranged above the refining furnace; a dust collecting structure arranged above the refining furnace, and the dust collecting structure is arranged at a position higher than 1.5 to 3 times the height of the electrode rod, or about 2 to 6 meters higher than the height of the electrode rod; a scrap steel secondary material bin, a feeding member is connected to the scrap steel secondary material bin, and a movable feeding pipe is connected between the feeding member and the refining furnace, and the movable feeding pipe can reciprocate between the feeding member and the refining furnace; a component adjusting bin connected to the refining furnace. The scrap steel secondary material is alloy steel scrap steel secondary material. The furnace body of the refining furnace is made of air permeable bricks, and the convection air can oxidize and remove impurities in the refining furnace. The feeding member is provided with one of a vibrating mechanism, a rolling mechanism, a disturbing mechanism or a stirring mechanism. The dust collecting structure is arranged at a position higher than 1.5 to 3 times the height of the electrode rod, or 2 to 6 meters higher than the height of the electrode rod. The scrap steel secondary material is added to the refining furnace in a weight ratio of 50% to 100%, and then the scrap steel secondary material is melted in the refining furnace; a reducing agent is added to the refining furnace to reduce the oxygen in the scrap steel secondary material in the refining furnace to become process molten steel; wherein the scrap steel secondary material recovered and processed is not limited to a steel grade; wherein the reducing agent includes adding coke in the refining furnace, or adding silicon and lime during the smelting process.

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