CN116121626B - Oriented silicon steel waste recycling method and recycling equipment - Google Patents

Oriented silicon steel waste recycling method and recycling equipment Download PDF

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Publication number
CN116121626B
CN116121626B CN202211446067.9A CN202211446067A CN116121626B CN 116121626 B CN116121626 B CN 116121626B CN 202211446067 A CN202211446067 A CN 202211446067A CN 116121626 B CN116121626 B CN 116121626B
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Prior art keywords
steel
screening
equal
waste
percent
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CN116121626A (en
Inventor
杜星宏
陈明毅
杨猛
邵光帅
叶明辉
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Anqing Xinpu Electric Equipment Co ltd
Wuxi Putian Iron Core Co Ltd
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Anqing Xinpu Electric Equipment Co ltd
Wuxi Putian Iron Core Co Ltd
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Priority to CN202211446067.9A priority Critical patent/CN116121626B/en
Publication of CN116121626A publication Critical patent/CN116121626A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C22C33/06—Making ferrous alloys by melting using master alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/16—Apparatus having only parallel elements the elements being movable and in other than roller form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/08—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5241—Manufacture of steel in electric furnaces in an inductively heated furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/005—Preliminary treatment of scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention belongs to the technical field of oriented silicon steel production, in particular to a method and equipment for recycling oriented silicon steel waste, wherein the recycling method comprises the following steps: a1: and (3) scrap steel screening: carrying out screening treatment on the cold rolled trimming material and cold impact rim charge of oriented silicon steel or non-oriented silicon steel and the waste coil of silicon steel meeting the element requirement to obtain a waste steel raw material; a2: melting in an intermediate frequency induction furnace: adopting intermediate frequency induction furnace equipment with bottom Ar blowing, adding scrap steel raw materials into the intermediate frequency induction furnace equipment for melting, adopting a carbonless ladle to hold molten steel, and carrying out tin alloying in the tapping process of the intermediate frequency induction furnace to obtain molten steel; a3: RH refining: adding molten steel into an RH refining furnace for refining to obtain refined molten steel; a4: casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain heavy cast silicon steel; the adopted short process is used for producing the technical silicon steel casting blank, and the ton of steel standard coal is 238-278 kg; compared with the traditional silicon steel casting blank production process, the production process adopted by the invention can save 543kgce/t.

Description

Oriented silicon steel waste recycling method and recycling equipment
Technical Field
The invention belongs to the technical field of oriented silicon steel production, and particularly relates to a method and equipment for recycling oriented silicon steel waste.
Background
The oriented silicon steel is a soft magnetic alloy with high magnetic flux density, and is mainly used for manufacturing iron cores of motors and transformers; the oriented silicon steel has complex production process and strict manufacturing technology, and is mainly divided into common oriented silicon steel and high magnetic induction oriented silicon steel.
The oriented silicon steel has the extremely narrow process window, so that the production flow of the traditional silicon steel casting blank is long: the method is characterized by sequentially carrying out mineral separation, sintering, coking, blast furnace, KR pretreatment, converter, RH refining and continuous casting, and has the overall high energy consumption and high emission; the traditional production process has high energy consumption and high emission, and does not meet the development requirement of the smelting industry.
After the silicon steel is cast, the silicon steel is required to be subjected to a subsequent stamping process to support products with fixed sizes, and in the process, the utilization rate of silicon steel materials is only 40-60%, a large amount of silicon steel waste is generated, and huge energy consumption and pollution are generated when the silicon steel waste is recycled.
Therefore, the invention provides a method and equipment for recycling oriented silicon steel waste.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a recovery method of oriented silicon steel waste, which comprises the following steps:
A1: and (3) scrap steel screening: screening the oriented silicon steel or non-oriented silicon steel cold-rolled trimming material, cold-impact edge corner material and silicon steel waste rolls meeting the element requirements to obtain waste steel granularity meeting the requirements, wherein the requirement on the waste steel granularity is not more than 200mm x 400mm, and the weight of single waste steel is not more than 500kg, so as to obtain a waste steel raw material;
a2: melting in an intermediate frequency induction furnace: adopting intermediate frequency induction furnace equipment with bottom Ar blowing, adding scrap steel raw materials into the intermediate frequency induction furnace equipment for melting, ensuring that the bubble area diameter of the surface of molten steel is 100-200 mm, removing steel slag on the surface of molten steel before tapping at the tapping temperature of 1600-1680 ℃, ensuring that the exposed area of molten steel is more than 95%, adopting a carbonless ladle to hold molten steel, tapping for not more than 3min, and performing tin alloying in the tapping process of the intermediate frequency induction furnace to obtain molten steel;
a3: RH refining: adding molten steel into an RH refining furnace for refining, and if the RH approach temperature is more than or equal to 1580 ℃, not performing pure aluminum oxygen heating operation; if 1550 ℃ is less than or equal to RH arrival temperature less than 1580 ℃, performing pure aluminum oxide heating operation; after RH treatment reaches the highest vacuum degree, namely not more than 40pa, the circulation time is not less than 10min; the RH treatment sequence comprises pre-vacuumizing, aluminum oxide heating, decarburization, deoxidization, alloying, net circulation and emptying; the adding sequence of the alloy in RH treatment is sequentially metal aluminum, sulfur iron, silicon nitride iron, silicon iron and metal manganese; refining to obtain refined molten steel;
A4: casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain heavy cast silicon steel; the adopted short process is used for producing the technical silicon steel casting blank, and the ton of steel standard coal is 238-278 kg; energy consumption estimation of the traditional casting blank production process: sintering 48kgce/t, pelletizing 25kgce/t, coking 100kgce/t, a blast furnace 400kgce/t, and pretreating 30kgce/t by using a converter and KR; compared with the traditional silicon steel casting blank production process, the production process adopted by the invention can save 543kgce/t.
Preferably, the steel scrap raw material comprises the following elements in percentage by mass: c is more than 0.003 percent and less than or equal to 0.07 percent; si is less than or equal to 4.5 percent; mn is more than or equal to 0.2% and less than or equal to 1.1%; p is less than or equal to 0.035%; s is more than 0.0020 percent and less than or equal to 0.01 percent; al < 0.6%; n is less than or equal to 0.01%; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities; the silicon steel trimming and stamping waste materials are utilized, the harmful elements are few, excellent raw material conditions are provided for controlling the components of the steelmaking process, only Sn, al, si, mn and elements are needed to be finely adjusted, and the production process is low in control.
Preferably, the recast silicon steel comprises the following elements in percentage by mass: c is more than or equal to 0.04% and less than or equal to 0.06%; si is more than or equal to 3.1 percent and less than or equal to 3.8 percent; mn is more than or equal to 0.07 percent and less than or equal to 0.25 percent; p is less than or equal to 0.020%; s is more than or equal to 0.008 percent and less than or equal to 0.015 percent; n is more than or equal to 0.008 percent and less than or equal to 0.09 percent; al is more than or equal to 0.010 percent and less than or equal to 0.030 percent; sn is less than or equal to 0.070; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities.
Preferably, the screening process comprises the steps of:
b1: the screening rods penetrate through the round holes, the screening rods are uniformly installed at the top of the vibrating screening machine, gaps between adjacent screening rods are controlled, the fixing plates are installed by bolts, and the screening rods are fixedly locked;
b2: the screw rod is screwed by using a wrench, the sliding plate is driven to move, the iron core is driven to slide into the distance inside the inner cavity, the current of the coil is adjusted, and the hydraulic cylinder is controlled to push the top conveyor belt to descend to be close to the bottom conveyor belt;
b3: feeding oriented silicon steel or non-oriented silicon steel cold-rolled trimming materials, cold-impact leftovers and silicon steel waste rolls meeting element requirements into a feeding end of a vibration screening machine, screening the waste steel in size by the vibration screening machine, enabling the waste steel meeting the requirements to pass through a screening rod and fall onto a screening plate, screening dust impurities in the waste steel by the screening plate, enabling the waste steel meeting the size requirements to fall onto a bottom conveyor belt through the screening plate, and discharging the waste steel with larger size out of the vibration screening machine through an oversized blanking port;
b4: the waste steel meeting the size requirement is brought into the shell by the bottom conveyor belt, the coil and the iron core are matched to generate magnetic force, the waste steel with larger mass cannot be sucked up and falls into the overweight blanking port, and the waste steel is led out of the shell by the blanking plate; the waste steel with the quality meeting the requirements is adsorbed on the surface of the baffle plate and is driven by the top conveyor belt to be transmitted, the waste steel with the quality meeting the requirements is blocked by the blanking scraper plate to fall onto the top surface of one bottom conveyor belt far away from the vibration screening machine and is conveyed out of the shell, and the waste steel meeting the requirements is obtained;
B5: and (3) introducing the waste steel with larger size and the waste steel with larger mass into a waste steel crusher to carry out crushing treatment, and sieving the treated waste steel again.
An oriented silicon steel scrap recycling apparatus, which is suitable for the oriented silicon steel scrap recycling method described above, the recycling apparatus comprising a size screening structure and a quality screening structure; the outlet of the size screening structure is communicated with the inlet of the quality screening structure; the size screening structure comprises a vibrating screening machine, a screening rod and a screening plate; a plurality of screening rods are uniformly arranged at the top of the vibrating screening machine, a screening plate is bolted to the middle of the vibrating screening machine, a plurality of through holes are uniformly formed in the middle of the screening plate, and an oversized feed opening is formed in one side of the top of the vibrating screening machine; the mass screening structure comprises a shell, a bottom conveyor belt, a top conveyor belt, a mounting seat, a coil and an iron core; the bottom conveyor belts are arranged at two ends of the bottom of the shell, an overweight blanking port is formed in one side of the middle of the shell, the overweight blanking port is positioned between the bottom conveyor belts at two ends, the blanking ends of the screening plates are communicated with the bottom conveyor belts close to each other, the top of the shell is provided with a top conveyor belt, the outer ring of the top conveyor belt is uniformly fixedly connected with a plurality of mounting seats, a plurality of inner cavities are uniformly formed in the mounting seats, coils are fixedly connected to the inner outer ring of the inner cavities, an iron core is arranged in the middle of the inner cavities, an inner ring of each coil is sleeved on the outer ring of each iron core, and one end, far away from the vibrating screening machine, of the top of the shell is provided with a blanking scraper; when the vibrating screen is in operation, oriented silicon steel or non-oriented silicon steel cold-rolled trimming materials, cold-impact leftover materials and silicon steel waste rolls meeting element requirements are put into the feeding end of the vibrating screen, the vibrating screen screens the sizes of the waste steel, the waste steel meeting the requirements passes through a screening rod to fall onto a screening plate, dust and impurities in the waste steel are screened out by the screening plate, the waste steel meeting the size requirements falls onto a bottom conveyor belt through the screening plate, and the waste steel with larger size is discharged out of the vibrating screen through an oversized blanking port; the scrap steel meeting the size requirement is brought into the shell by the bottom conveyor belt, the coil and the iron core are matched to generate magnetic force, the scrap steel with larger mass cannot be sucked up, and falls into the overweight blanking port to be led out of the shell; the waste steel with the quality meeting the requirements is sucked up and driven by the top conveyor belt to be transmitted, the waste steel with the quality meeting the requirements is blocked by the blanking scraper plate to fall onto the top surface of one bottom conveyor belt far away from the vibration screening machine and is conveyed out of the shell, and the waste steel meeting the requirements is obtained; introducing the waste steel with larger size and the waste steel with larger mass into a waste steel crusher to carry out crushing treatment, and sieving the treated waste steel again; thereby obtaining the waste steel raw material meeting the requirements, improving the screening efficiency and reducing the workload of staff.
Preferably, a plurality of cross beams are uniformly and fixedly connected to the inner ring at the top of the vibration screening machine, a plurality of round holes are formed in one side of the top of the cross beams and one side of the top of the vibration screening machine, the adjacent round holes are communicated, screening rods are slidably arranged in the round holes, a fixing plate is bolted to one side of the top of the vibration screening machine, one surface of the fixing plate, close to the vibration screening machine, covers the outer ring of the round holes, and the fixing plate is in sliding fit with the end heads of the screening rods; when the vibrating screen is in operation, the screening rods penetrate through the round holes, the screening rods are uniformly arranged at the top of the vibrating screen, gaps between adjacent screening rods are controlled, the fixing plates are arranged by using bolts, and the screening rods are fixedly locked; the screening of the size of the scrap steel is controlled by controlling the distance between the adjacent screening rods, so that the adjustment of workers is facilitated; the screening rod is fixed through the fixed plate that sets up to the vibration of vibration screening machine during operation has reduced the probability that the screening rod takes place to rock the displacement.
Preferably, the outer ring of the bottom conveyor belt is uniformly fixedly connected with a plurality of anti-slip strips, and the surfaces of the anti-slip strips are uniformly provided with anti-slip lines; the coil and the iron core are matched to generate magnetic force, so that the waste steel with larger mass cannot be sucked up, but the generated magnetic force can reduce the friction force between the waste steel and the bottom conveyor belt, so that the conveying effect of the bottom conveyor belt is reduced, and the waste steel with larger mass is accumulated and blocked on the bottom conveyor belt; the friction force between the steel scraps and the anti-slip strips is increased, so that the conveying effect of the bottom conveyor belt is improved, and the probability of accumulation and blockage of the steel scraps with larger mass on the bottom conveyor belt is reduced.
Preferably, a baffle is fixedly connected to one surface of the mounting seat far away from the top conveyor belt, adjacent baffle plates are contacted with each other, the bottom end of the blanking scraper is in sliding fit with the outer ring of the baffle plate, screw rods are rotatably mounted at two ends of the baffle plate, the end heads of the screw rods are rotatably connected with the mounting seat, sliding plates are slidably mounted between the screw rods at two sides, a threaded sleeve is mounted on the outer ring threads of the screw rods, the outer ring of the threaded sleeve is fixedly connected with the sliding plates, one surface of the sliding plate close to the mounting seat is fixedly connected with the end heads of iron cores, and the iron cores slidably penetrate through the outer wall of the mounting seat; during operation, the spanner is used to twist the screw rod, through the screw-thread fit of the surplus screw rod of screw thread sleeve, simultaneously, the screw rod at both ends has restricted the slide and has taken place to rotate for the slide removes along the screw rod, drives the iron core and slides into the inner chamber inside, thereby the control coil cover is at the number of turns of iron core outer lane, cooperates the electric current size of adjusting the coil simultaneously, and the magnetic force size of control production, then the quality of control suction steel scrap.
Preferably, hydraulic cylinders are fixedly connected to two ends of the top of the shell, piston rods of the hydraulic cylinders penetrate through the top wall of the shell in a sliding mode, a top plate is mounted on the top of the shell in a sliding mode, the top surface of the top plate is fixedly connected with the piston rods of the hydraulic cylinders, a top conveyor belt is mounted in the top plate, one end, far away from the vibration screening machine, of the top plate is fixedly connected with a plurality of sliding rails, the top of the blanking scraper is in sliding fit with the sliding rails, and the top of the blanking scraper is fixed with the sliding rails through bolts; when the device works, the hydraulic cylinder is controlled to push the top conveyor belt to descend to be close to the bottom conveyor belt, and the distance between the magnetic force generated by the coil and the iron core and the scrap steel is controlled, so that the scrap steel sucking efficiency meeting the requirements is further controlled; through the slide rail that sets up, the contact and the stopper between the steel scrap of staff's control unloading scraper blade and absorption on the baffle of being convenient for to the unloading rate of steel scrap has been improved to the compliance, the steel scrap has reduced the probability that steel scrap accompanies top conveyer belt rotation to the top.
Preferably, a blanking plate is fixedly connected in the overweight blanking opening, the blanking plate is obliquely arranged, and a spring is arranged at the bottom of the blanking plate; when the steel strip feeding device works, after the steel strip with larger mass falls into the overweight feed opening, the steel strip with larger mass falls onto the top of the feed plate, and the steel strip with larger mass slides out of the shell along the feed plate; simultaneously, the weight of the waste steel with larger mass enables the spring at the bottom of the blanking plate to be compressed, and the generated elastic force pushes the blanking plate to shake, so that the blanking rate of the blanking plate is improved.
The beneficial effects of the invention are as follows:
1. according to the oriented silicon steel waste recycling method and recycling equipment, the short-process production process silicon steel casting blank is adopted, and the ton of steel standard coal is 238-278 kg; energy consumption estimation of the traditional casting blank production process: sintering 48kgce/t, pelletizing 25kgce/t, coking 100kgce/t, a blast furnace 400kgce/t, and pretreating 30kgce/t by using a converter and KR; compared with the traditional silicon steel casting blank production process, the production process adopted by the invention can save 543kgce/t; the silicon steel trimming and stamping waste materials are utilized, the harmful elements are few, excellent raw material conditions are provided for controlling the components of the steelmaking process, only Sn, al, si, mn and elements are needed to be finely adjusted, and the production process is low in control.
2. According to the oriented silicon steel waste recycling method and recycling equipment, a vibrating screening machine, a screening rod, a screening plate, a shell, a bottom conveyor belt, a top conveyor belt, a mounting seat, a coil and an iron core are arranged; the method comprises the steps that oriented silicon steel or non-oriented silicon steel cold-rolled trimming materials and cold-impact leftover materials and silicon steel waste rolls meeting element requirements are put into a feeding end of a vibration screening machine, the vibration screening machine screens the sizes of waste steel, the waste steel meeting the requirements passes through a screening rod and falls onto a screening plate, dust impurities in the waste steel are screened out by the screening plate, the waste steel meeting the size requirements falls onto a bottom conveyor belt through the screening plate, and the waste steel with larger size is discharged out of the vibration screening machine through an oversized blanking port; the scrap steel meeting the size requirement is brought into the shell by the bottom conveyor belt, the coil and the iron core are matched to generate magnetic force, the scrap steel with larger mass cannot be sucked up, and falls into the overweight blanking port to be led out of the shell; the waste steel with the quality meeting the requirements is sucked up and driven by the top conveyor belt to be transmitted, the waste steel with the quality meeting the requirements is blocked by the blanking scraper plate to fall onto the top surface of one bottom conveyor belt far away from the vibration screening machine and is conveyed out of the shell, and the waste steel meeting the requirements is obtained; thereby obtaining the waste steel raw material meeting the requirements, improving the screening efficiency and reducing the workload of staff.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of the recovery method of the present invention;
FIG. 2 is a flow chart of a screening process in the present invention;
FIG. 3 is a perspective view of the present invention;
FIG. 4 is a perspective view of a size screening arrangement of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a perspective view of a mass screening structure of the present invention;
FIG. 7 is a cross-sectional view of a mass screening structure of the present invention;
FIG. 8 is an enlarged view of a portion of FIG. 7 at B;
FIG. 9 is a perspective view of the blanking scraper of the present invention;
FIG. 10 is a perspective view of a mount of the present invention;
FIG. 11 is a cross-sectional view of a mount of the present invention;
in the figure: 1. a vibratory screening machine; 2. a screening rod; 3. a screening plate; 4. a housing; 5. a bottom conveyor belt; 6. a top conveyor belt; 7. a mounting base; 8. a coil; 9. an iron core; 10. overweight blanking port; 11. an inner cavity; 12. a blanking scraper; 13. a cross beam; 14. a round hole; 15. a fixing plate; 16. an anti-slip strip; 17. a baffle; 18. a screw; 19. a slide plate; 20. a threaded sleeve; 21. a hydraulic cylinder; 22. a top plate; 23. a slide rail; 24. and (5) blanking plates.
Detailed Description
The invention is further described in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
As shown in fig. 1, the method for recycling oriented silicon steel waste according to the embodiment of the invention comprises the following steps:
a1: and (3) scrap steel screening: screening the oriented silicon steel or non-oriented silicon steel cold-rolled trimming material, cold-impact edge corner material and silicon steel waste rolls meeting the element requirements to obtain waste steel granularity meeting the requirements, wherein the requirement on the waste steel granularity is not more than 200mm x 400mm, and the weight of single waste steel is not more than 500kg, so as to obtain a waste steel raw material;
a2: melting in an intermediate frequency induction furnace: adopting intermediate frequency induction furnace equipment with bottom Ar blowing, adding scrap steel raw materials into the intermediate frequency induction furnace equipment for melting, ensuring that the bubble area diameter of the surface of molten steel is 100-200 mm, removing steel slag on the surface of molten steel before tapping at the tapping temperature of 1600-1680 ℃, ensuring that the exposed area of molten steel is more than 95%, adopting a carbonless ladle to hold molten steel, tapping for not more than 3min, and performing tin alloying in the tapping process of the intermediate frequency induction furnace to obtain molten steel;
a3: RH refining: adding molten steel into an RH refining furnace for refining, and if the RH approach temperature is more than or equal to 1580 ℃, not performing pure aluminum oxygen heating operation; if 1550 ℃ is less than or equal to RH arrival temperature less than 1580 ℃, performing pure aluminum oxide heating operation; after RH treatment reaches the highest vacuum degree, namely not more than 40pa, the circulation time is not less than 10min; the RH treatment sequence comprises pre-vacuumizing, aluminum oxide heating, decarburization, deoxidization, alloying, net circulation and emptying; the adding sequence of the alloy in RH treatment is sequentially metal aluminum, sulfur iron, silicon nitride iron, silicon iron and metal manganese; refining to obtain refined molten steel;
A4: casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain heavy cast silicon steel; the adopted short process is used for producing the technical silicon steel casting blank, and the ton of steel standard coal is 238-278 kg; energy consumption estimation of the traditional casting blank production process: sintering 48kgce/t, pelletizing 25kgce/t, coking 100kgce/t, a blast furnace 400kgce/t, and pretreating 30kgce/t by using a converter and KR; compared with the traditional silicon steel casting blank production process, the production process adopted by the invention can save 543kgce/t.
The steel scrap raw material comprises the following elements in percentage by mass: c is more than 0.003 percent and less than or equal to 0.07 percent; si is less than or equal to 4.5 percent; mn is more than or equal to 0.2% and less than or equal to 1.1%; p is less than or equal to 0.035%; s is more than 0.0020 percent and less than or equal to 0.01 percent; al < 0.6%; n is less than or equal to 0.01%; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities; the silicon steel trimming and stamping waste materials are utilized, the harmful elements are few, excellent raw material conditions are provided for controlling the components of the steelmaking process, only Sn, al, si, mn and elements are needed to be finely adjusted, and the production process is low in control.
The recast silicon steel comprises the following elements in percentage by mass: c is more than or equal to 0.04% and less than or equal to 0.06%; si is more than or equal to 3.1 percent and less than or equal to 3.8 percent; mn is more than or equal to 0.07 percent and less than or equal to 0.25 percent; p is less than or equal to 0.020%; s is more than or equal to 0.008 percent and less than or equal to 0.015 percent; n is more than or equal to 0.008 percent and less than or equal to 0.09 percent; al is more than or equal to 0.010 percent and less than or equal to 0.030 percent; sn is less than or equal to 0.070; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities.
As shown in fig. 2, the screening process includes the steps of:
b1: the screening rods 2 penetrate through the round holes 14, the screening rods 2 are uniformly installed on the top of the vibrating screening machine 1, gaps between adjacent screening rods 2 are controlled, the fixing plates 15 are installed by bolts, and the screening rods 2 are fixedly locked;
b2: the screw rod 18 is screwed by using a spanner, the sliding plate 19 is driven to move, the iron core 9 is driven to slide into the distance inside the inner cavity 11, the current of the coil 8 is adjusted, and the hydraulic cylinder 21 is controlled to push the top conveyor belt 6 to descend to be close to the bottom conveyor belt 5;
b3: feeding oriented silicon steel or non-oriented silicon steel cold-rolled trimming materials, cold-impact leftovers and silicon steel waste rolls meeting element requirements into a feeding end of a vibrating screening machine 1, screening the waste steel in size by the vibrating screening machine 1, enabling the waste steel meeting the requirements to pass through a screening rod 2 and fall onto a screening plate 3, screening dust impurities in the waste steel by the screening plate 3, enabling the waste steel meeting the size requirements to fall onto a bottom conveyor belt 5 through the screening plate 3, and discharging the waste steel with larger size out of the vibrating screening machine 1 through an oversized blanking port;
b4: the scrap steel meeting the size requirement is brought into the shell 4 by the bottom conveyor belt 5, the coil 8 and the iron core 9 are matched to generate magnetic force, the scrap steel with larger mass cannot be sucked up and falls into the overweight blanking opening 10, and the scrap steel is led out of the shell 4 by the blanking plate 24; the waste steel with the quality meeting the requirements is adsorbed on the surface of the baffle 17 and is driven to be transmitted by the top conveyor belt 6, the waste steel with the quality meeting the requirements is blocked by the blanking scraper 12 from falling onto the top surface of one bottom conveyor belt 5 far away from the vibration screening machine 1 and is conveyed out of the shell 4, and the waste steel meeting the requirements is obtained;
B5: and (3) introducing the waste steel with larger size and the waste steel with larger mass into a waste steel crusher to carry out crushing treatment, and sieving the treated waste steel again.
As shown in fig. 3 to 11, an oriented silicon steel scrap recycling apparatus, which is suitable for the above oriented silicon steel scrap recycling method, includes a size screening structure and a quality screening structure; the outlet of the size screening structure is communicated with the inlet of the quality screening structure; the size screening structure comprises a vibrating screening machine 1, a screening rod 2 and a screening plate 3; a plurality of screening rods 2 are uniformly arranged at the top of the vibrating screening machine 1, a screening plate 3 is bolted to the middle of the vibrating screening machine 1, a plurality of through holes are uniformly formed in the middle of the screening plate 3, and an oversized blanking opening is formed in one side of the top of the vibrating screening machine 1; the mass screening structure comprises a shell 4, a bottom conveyor belt 5, a top conveyor belt 6, a mounting seat 7, a coil 8 and an iron core 9; the bottom conveyor belts 5 are arranged at two ends of the bottom of the shell 4, an overweight blanking port 10 is formed in one side of the middle of the shell 4, the overweight blanking port 10 is positioned between the bottom conveyor belts 5 at two ends, the blanking ends of the screening plates 3 are communicated with the bottom conveyor belts 5 close to each other, the top of the shell 4 is provided with a top conveyor belt 6, the outer ring of the top conveyor belt 6 is uniformly fixedly connected with a plurality of mounting seats 7, a plurality of inner cavities 11 are uniformly formed in the mounting seats 7, coils 8 are fixedly connected to the inner outer ring of the inner cavities 11, an iron core 9 is arranged in the middle of the inner cavities 11, the inner ring of each coil 8 is sleeved on the outer ring of each iron core 9, and one end, far away from the vibrating screening machine 1, of the top of the shell 4 is provided with a blanking scraper 12; when the vibrating screen machine works, oriented silicon steel or non-oriented silicon steel cold-rolled trimming materials, cold-impact leftover materials and silicon steel waste rolls meeting element requirements are put into the feeding end of the vibrating screen machine 1, the vibrating screen machine 1 screens the sizes of the waste steel, the waste steel meeting the requirements passes through a screening rod 2 and falls onto a screening plate 3, dust and impurities in the waste steel are screened out by the screening plate 3, the waste steel meeting the size requirements falls onto a bottom conveyor belt 5 through the screening plate 3, and the waste steel with larger size is discharged out of the vibrating screen machine 1 through an oversized blanking opening; the scrap steel meeting the size requirement is brought into the shell 4 by the bottom conveyor belt 5, the coil 8 and the iron core 9 are matched to generate magnetic force, the scrap steel with larger mass cannot be sucked up, and falls into the overweight blanking port 10 to be led out of the shell; the scrap steel with the quality meeting the requirements is sucked up and driven by the top conveyor belt 6 to be transmitted, the scrap steel with the quality meeting the requirements is blocked by the blanking scraper 12 from falling onto the top surface of one bottom conveyor belt 5 far away from the vibration screening machine 1 and is conveyed out of the shell 4, and the scrap steel meeting the requirements is obtained; introducing the waste steel with larger size and the waste steel with larger mass into a waste steel crusher to carry out crushing treatment, and sieving the treated waste steel again; thereby obtaining the waste steel raw material meeting the requirements, improving the screening efficiency and reducing the workload of staff.
As shown in fig. 3 to 5, the inner ring at the top of the vibration screening machine 1 is uniformly and fixedly connected with a plurality of cross beams 13, a plurality of round holes 14 are formed in one side of the cross beams 13 and the top of the vibration screening machine 1, the adjacent round holes 14 are communicated, screening rods 2 are slidably mounted in the plurality of round holes 14, a fixing plate 15 is bolted to one side of the top of the vibration screening machine 1, one side of the fixing plate 15, close to the vibration screening machine 1, is covered on the outer ring of the round holes 14, and the fixing plate 15 is in sliding fit with the end heads of the screening rods 2; when the vibrating screen is in operation, the screening rods 2 penetrate through the round holes 14, the screening rods 2 are uniformly installed on the top of the vibrating screen 1, gaps between adjacent screening rods 2 are controlled, the fixing plates 15 are installed by bolts, and the screening rods 2 are fixedly locked; the screening of the size of the scrap steel is controlled by controlling the distance between the adjacent screening rods 2, so that the adjustment of workers is facilitated; the screening rod 2 is fixed through the fixed plate 15, so that the probability of shaking displacement of the screening rod 2 caused by vibration of the vibration screening machine 1 during working is reduced.
As shown in fig. 6 to 8, the outer ring of the bottom conveyor belt 5 is uniformly and fixedly connected with a plurality of anti-slip strips 16, and the surface of the anti-slip strips 16 is uniformly provided with anti-slip lines; the coil 8 and the iron core 9 are matched to generate magnetic force, so that the waste steel with larger mass cannot be sucked up, but the generated magnetic force can reduce the friction force between the waste steel and the bottom conveyor belt 5, reduce the conveying effect of the bottom conveyor belt 5 and enable the waste steel with larger mass to be accumulated and blocked on the bottom conveyor belt 5; friction with the scrap steel is increased through the arranged anti-slip strips 16, so that conveying effect of the bottom conveyor belt 5 is improved, and probability of accumulation and blockage of the scrap steel with larger mass on the bottom conveyor belt 5 is reduced.
As shown in fig. 10 to 11, a baffle 17 is fixedly connected to one surface of the mounting seat 7 far away from the top conveyor belt 6, adjacent baffle 17 are in contact with each other, the bottom end of the blanking scraper 12 is in sliding fit with the outer ring of the baffle 17, two ends of the baffle 17 are rotatably provided with a screw rod 18, the end head of the screw rod 18 is rotatably connected with the mounting seat 7, two sides of the screw rod 18 are slidably provided with a sliding plate 19, the outer ring of the screw rod 18 is provided with a threaded sleeve 20 in a threaded manner, the outer ring of the threaded sleeve 20 is fixedly connected with the sliding plate 19, one surface of the sliding plate 19 close to the mounting seat 7 is fixedly connected with the end head of the iron core 9, and the iron core 9 penetrates through the outer wall of the mounting seat 7 in a sliding manner; during operation, the screw rod 18 is screwed by using the spanner, the threaded sleeve 20 is matched with the threads of the screw rod 18, meanwhile, the screws 18 at two ends limit the sliding plate 19 to rotate, the sliding plate 19 moves along the screw rod 18 to drive the iron core 9 to slide into the inner cavity 11, thereby controlling the number of turns of the coil 8 sleeved on the outer ring of the iron core 9, simultaneously matching with the current of the coil 8 to adjust the magnetic force generated by the coil 8, and further controlling the quality of the sucked scrap steel.
As shown in fig. 6, 7 and 9, two ends of the top of the casing 4 are fixedly connected with a hydraulic cylinder 21, a piston rod of the hydraulic cylinder 21 penetrates through the top wall of the casing 4 in a sliding manner, a top plate 22 is slidably mounted on the top of the casing 4, the top surface of the top plate 22 is fixedly connected with the piston rod of the hydraulic cylinder 21, a top conveyor belt 6 is mounted in the top plate 22, a plurality of sliding rails 23 are fixedly connected to one end, far away from the vibration screening machine 1, of the top plate 22, the top of the blanking scraper 12 is slidably matched with the sliding rails 23, and the top of the blanking scraper 12 is fixed with the sliding rails 23 through bolts; when the device works, the hydraulic cylinder 21 is controlled to push the top conveyor belt 6 to descend to be close to the bottom conveyor belt 5, and the distance between the magnetic force generated by the coil 8 and the iron core 9 and the scrap steel is controlled, so that the scrap steel sucking efficiency meeting the requirements is further controlled; through the slide rail 23 that sets up, the contact and the resistance between the steel scrap of staff's control unloading scraper blade 12 and absorption on baffle 17 are convenient for to the unloading rate of steel scrap has been improved to the compliance, the probability that steel scrap accompanies top conveyer belt 6 to rotate the top has been reduced.
As shown in fig. 3 and 7, the inside of the overweight blanking port 10 is fixedly connected with a blanking plate 24, the blanking plate 24 is obliquely arranged, and the bottom of the blanking plate 24 is provided with a spring; when the steel scrap box works, after the steel scrap with larger mass falls into the overweight blanking port 10, the steel scrap with larger mass falls onto the top of the blanking plate 24, and the steel scrap with larger mass slides out of the shell 4 along the blanking plate 24; meanwhile, the spring at the bottom of the blanking plate 24 is compressed due to the weight of the waste steel with larger mass, and the generated elastic force pushes the blanking plate 24 to shake, so that the blanking rate of the blanking plate 24 is improved.
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Example 1
The embodiment of the invention discloses a method for recycling oriented silicon steel waste, which comprises the following steps:
a1: and (3) scrap steel screening: 100% of the sources of the scrap steel raw materials are the waste materials of the oriented scrap silicon steel, the scrap steel granularity meeting the requirements is screened out, the requirement of the scrap steel granularity is not more than 200mm x 400mm, and the weight of single scrap steel is not more than 500kg, so that the scrap steel raw materials are obtained;
a2: melting in an intermediate frequency induction furnace: adding scrap steel raw materials into medium frequency induction furnace equipment with bottom Ar blowing for melting, wherein the area diameter of bubbles on the surface of molten steel is 100-200 mm, the tapping temperature is 1680 ℃, the steel slag on the surface of molten steel is removed before tapping, the exposed area of molten steel is 95%, a carbonless ladle is used for containing molten steel, the tapping time is 2.8min, and tin alloying is carried out in the tapping process of the medium frequency induction furnace to obtain molten steel;
A3: RH refining: adding molten steel into an RH refining furnace for refining, wherein the RH station entering temperature is 1625 ℃, the RH pre-pumping vacuum degree is 45kpa, and the highest vacuum degree is 35pa; the RH treatment sequence comprises pre-vacuumizing, decarburizing, deoxidizing, alloying, net circulation and emptying; the adding sequence of the alloy in RH treatment is sequentially metal aluminum, silicon nitride iron, silicon iron and metal manganese; refining to obtain refined molten steel;
a4: and casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain the heavy casting silicon steel.
The mass percentages of the detection of the steel scrap raw material elements are as follows: c is more than or equal to 0.003 percent and less than or equal to 0.06 percent; si is more than or equal to 2.8 percent and less than or equal to 3.6 percent; mn is more than or equal to 0.20% and less than or equal to 0.25%; p is more than or equal to 0.012% and less than or equal to 0.020%; s is more than or equal to 0.0080% and less than or equal to 0.0095%; al is more than or equal to 0.0080% and less than 0.030%; n is more than or equal to 0.0080% and less than or equal to 0.009%; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities.
Production energy consumption: 253.3 kg of medium frequency induction furnace and RH refining ton steel standard coal, and 19.6 kg of slab continuous casting ton steel standard coal.
Example two
The embodiment of the invention discloses a method for recycling oriented silicon steel waste, which comprises the following steps:
a1: and (3) scrap steel screening: 100% of the scrap steel raw material is waste material of non-oriented scrap silicon steel, screening is carried out, the scrap steel granularity meeting the requirement is screened out, the requirement of the scrap steel granularity is not more than 200mm x 400mm, and the weight of single scrap steel is not more than 500kg, so that the scrap steel raw material is obtained;
A2: melting in an intermediate frequency induction furnace: adopting intermediate frequency induction furnace equipment with bottom Ar blowing, adding scrap steel raw materials into the intermediate frequency induction furnace equipment for melting, ensuring the bubble area diameter of the surface of molten steel to be 100-200 mm, removing steel slag on the surface of molten steel before tapping at 1605 ℃, enabling the bare area of molten steel to be 98%, adopting a carbonless ladle to hold molten steel, enabling the tapping time to be not more than 3.0min, and carrying out tin alloying in the tapping process of the intermediate frequency induction furnace to obtain molten steel;
a3: RH refining: adding molten steel into an RH refining furnace for refining, wherein the RH approach temperature is 1635 ℃, the RH pre-pumping vacuum degree is 45kpa, and the highest vacuum degree is 33pa; the RH treatment sequence comprises pre-vacuumizing, decarburizing, deoxidizing, alloying, net circulation and emptying; the adding sequence of the alloy in RH treatment is sequentially metal aluminum, sulfur iron, silicon nitride iron, silicon iron and metal manganese; refining to obtain refined molten steel;
a4: and casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain the heavy casting silicon steel.
The mass percentages of the detection of the steel scrap raw material elements are as follows: c is more than or equal to 0.0031 percent and less than or equal to 0.0035 percent; si is more than or equal to 1.0% and less than or equal to 3.2%; mn is more than or equal to 0.20% and less than or equal to 0.40%; p is more than or equal to 0.015% and less than or equal to 0.020%; s is more than or equal to 0.0020 percent and less than or equal to 0.0035 percent; al is more than or equal to 0.02 percent and less than 0.55 percent; n is more than or equal to 0.001% and less than or equal to 0.002%; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities.
Production energy consumption: 241.2 kg of medium frequency induction furnace and RH refining ton steel standard coal, and 18.9 kg of slab continuous casting ton steel standard coal.
Example III
The embodiment of the invention discloses a method for recycling oriented silicon steel waste, which comprises the following steps:
a1: and (3) scrap steel screening: the sources of the scrap steel raw materials are 50% of waste materials of non-oriented waste silicon steel and 50% of waste materials of oriented waste silicon steel, screening is carried out, the scrap steel granularity meeting the requirements is screened out, the requirement of the scrap steel granularity is not more than 200mm x 400mm, and the weight of single scrap steel is not more than 500kg, so that the scrap steel raw materials are obtained;
a2: melting in an intermediate frequency induction furnace: adopting intermediate frequency induction furnace equipment with bottom Ar blowing, adding scrap steel raw materials into the intermediate frequency induction furnace equipment for melting, ensuring the bubble area diameter of the surface of molten steel to be 100-200 mm, removing steel slag on the surface of molten steel before tapping at 1605 ℃, wherein the bare area of molten steel is 96%, adopting a carbonless ladle to hold molten steel, tapping for not more than 2.5min, and performing tin alloying in the tapping process of the intermediate frequency induction furnace to obtain molten steel;
a3: RH refining: adding molten steel into an RH refining furnace for refining, wherein the RH approach temperature is 1575 ℃, and the oxygen blowing amount is 200Nm 3 Metal Al addition amount 30kg, RH pre-pumping vacuum degree of 45kpa and highest vacuum degree of 31pa; the RH treatment sequence comprises pre-vacuumizing, decarburizing, deoxidizing, alloying, net circulation and emptying; the adding sequence of the alloy in RH treatment is sequentially metal aluminum, sulfur iron, silicon nitride iron, silicon iron and metal manganese; refining to obtain refined molten steel;
a4: and casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain the heavy casting silicon steel.
The mass percentages of the detection of the steel scrap raw material elements are as follows: c is more than or equal to 0.003% and less than or equal to 0.050%; si is more than or equal to 1.0% and less than or equal to 4.0%; mn is more than or equal to 0.15 percent and less than or equal to 0.40 percent; p is more than or equal to 0.010% and less than or equal to 0.020%; s is more than or equal to 0.0020 percent and less than or equal to 0.01 percent; al is more than or equal to 0.008 percent and less than 0.58 percent; n is more than or equal to 0.001% and less than or equal to 0.01%; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities.
Production energy consumption: 239.6 kg of medium frequency induction furnace and RH refining ton steel standard coal and 18.5 kg of slab continuous casting ton steel standard coal.
Example IV
The embodiment of the invention discloses a method for recycling oriented silicon steel waste, which comprises the following steps:
a1: and (3) scrap steel screening: the sources of the scrap steel raw materials are 30% of waste materials of non-oriented waste silicon steel and 70% of waste materials of oriented waste silicon steel, screening is carried out, the scrap steel granularity meeting the requirements is screened out, the requirement of the scrap steel granularity is not more than 200mm x 400mm, and the weight of single scrap steel is not more than 500kg, so that the scrap steel raw materials are obtained;
A2: melting in an intermediate frequency induction furnace: adopting intermediate frequency induction furnace equipment with bottom Ar blowing, adding scrap steel raw materials into the intermediate frequency induction furnace equipment for melting, ensuring the bubble area diameter of the surface of molten steel to be 100-200 mm, removing steel slag on the surface of molten steel before tapping at the temperature of 1625 ℃, wherein the bare area of molten steel is 96%, adopting a carbonless ladle to hold molten steel, the tapping time is not more than 2.5min, and tin alloying is carried out in the tapping process of the intermediate frequency induction furnace to obtain molten steel;
a3: RH refining: adding molten steel into an RH refining furnace for refining, wherein the RH station entering temperature is 1595 ℃, the RH pre-pumping vacuum degree is 45kpa, and the highest vacuum degree is 31pa; the RH treatment sequence comprises pre-vacuumizing, decarburizing, deoxidizing, alloying, net circulation and emptying; the adding sequence of the alloy in RH treatment is sequentially metal aluminum, sulfur iron, silicon nitride iron, silicon iron and metal manganese; refining to obtain refined molten steel;
a4: and casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain the heavy casting silicon steel.
The mass percentages of the detection of the steel scrap raw material elements are as follows: c is more than or equal to 0.0035 percent and less than or equal to 0.060 percent; si is more than or equal to 1.5% and less than or equal to 3.8%; mn is more than or equal to 0.22 percent and less than or equal to 0.40 percent; p is more than or equal to 0.011% and less than or equal to 0.018%; s is more than or equal to 0.0020 percent and less than or equal to 0.009 percent; al is more than or equal to 0.007% and less than 0.58%; n is more than or equal to 0.001% and less than or equal to 0.008%; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities.
Production energy consumption: intermediate frequency induction furnace and RH refining ton steel standard coal 235.5 kg, slab continuous casting ton steel standard coal 18.3 kg.
When in operation, the device comprises: the screening rods 2 penetrate through the round holes 14, the screening rods 2 are uniformly installed on the top of the vibrating screening machine 1, gaps between adjacent screening rods 2 are controlled, the fixing plates 15 are installed by bolts, and the screening rods 2 are fixedly locked; the screening of the size of the scrap steel is controlled by controlling the distance between the adjacent screening rods 2, so that the adjustment of workers is facilitated; the screw rod 18 is screwed by using a spanner, the screw rods 18 at two ends are limited to rotate by the screw thread sleeve 20 and the screw threads of the screw rod 18, so that the slide plate 19 moves along the screw rod 18 to drive the iron core 9 to slide into the inner cavity 11, thereby controlling the number of turns of the coil 8 sleeved on the outer ring of the iron core 9, and simultaneously controlling the magnitude of the generated magnetic force by matching with the current magnitude of the coil 8; the control hydraulic cylinder 21 pushes the top conveyor belt 6 to descend to be close to the bottom conveyor belt 5, and the distance between the magnetic force generated by the coil 8 and the iron core 9 and the scrap steel is controlled;
feeding oriented silicon steel or non-oriented silicon steel cold-rolled trimming materials, cold-impact leftovers and silicon steel waste rolls meeting element requirements into a feeding end of a vibrating screening machine 1, screening the waste steel in size by the vibrating screening machine 1, enabling the waste steel meeting the requirements to pass through a screening rod 2 and fall onto a screening plate 3, screening dust impurities in the waste steel by the screening plate 3, enabling the waste steel meeting the size requirements to fall onto a bottom conveyor belt 5 through the screening plate 3, and discharging the waste steel with larger size out of the vibrating screening machine 1 through an oversized blanking port; the scrap steel meeting the size requirement is brought into the shell 4 by the bottom conveyor belt 5, the coil 8 and the iron core 9 are matched to generate magnetic force, the scrap steel with larger mass cannot be sucked up, and falls into the overweight blanking port 10 to be led out of the shell; the scrap steel with the quality meeting the requirements is sucked up and driven by the top conveyor belt 6 to be transmitted, the scrap steel with the quality meeting the requirements is blocked by the blanking scraper 12 from falling onto the top surface of one bottom conveyor belt 5 far away from the vibration screening machine 1 and is conveyed out of the shell 4, and the scrap steel meeting the requirements is obtained; introducing the waste steel with larger size and the waste steel with larger mass into a waste steel crusher to carry out crushing treatment, and sieving the treated waste steel again; screening out waste steel granularity meeting the requirement, wherein the requirement of the waste steel granularity is not more than 200mm x 400mm, and the weight of single waste steel is not more than 500kg, so as to obtain a waste steel raw material;
Adopting intermediate frequency induction furnace equipment with bottom Ar blowing, adding scrap steel raw materials into the intermediate frequency induction furnace equipment for melting, ensuring that the bubble area diameter of the surface of molten steel is 100-200 mm, removing steel slag on the surface of molten steel before tapping at the tapping temperature of 1600-1680 ℃, ensuring that the exposed area of molten steel is more than 95%, adopting a carbonless ladle to hold molten steel, tapping for not more than 3min, and performing tin alloying in the tapping process of the intermediate frequency induction furnace to obtain molten steel; adding molten steel into an RH refining furnace for refining, and if the RH approach temperature is more than or equal to 1580 ℃, not performing pure aluminum oxygen heating operation; if 1550 ℃ is less than or equal to RH arrival temperature less than 1580 ℃, performing pure aluminum oxide heating operation; after RH treatment reaches the highest vacuum degree, namely not more than 40pa, the circulation time is not less than 10min; the RH treatment sequence comprises pre-vacuumizing, aluminum oxide heating, decarburization, deoxidization, alloying, net circulation and emptying; the adding sequence of the alloy in RH treatment is sequentially metal aluminum, sulfur iron, silicon nitride iron, silicon iron and metal manganese; refining to obtain refined molten steel; and casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain the heavy casting silicon steel.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. An oriented silicon steel waste recycling device, which is characterized in that: the recovery equipment is suitable for a recovery method of oriented silicon steel waste, and the recovery method comprises the following steps:
a1: and (3) scrap steel screening: screening the oriented silicon steel or non-oriented silicon steel cold-rolled trimming material, cold-impact edge corner material and silicon steel waste rolls meeting the element requirements to obtain waste steel granularity meeting the requirements, wherein the requirement on the waste steel granularity is not more than 200mm x 400mm, and the weight of single waste steel is not more than 500kg, so as to obtain a waste steel raw material;
a2: melting in an intermediate frequency induction furnace: adopting intermediate frequency induction furnace equipment with bottom Ar blowing, adding scrap steel raw materials into the intermediate frequency induction furnace equipment for melting, ensuring that the bubble area diameter of the surface of molten steel is 100-200 mm, removing steel slag on the surface of molten steel before tapping at the tapping temperature of 1600-1680 ℃, ensuring that the exposed area of molten steel is more than 95%, adopting a carbonless ladle to hold molten steel, tapping for not more than 3min, and performing tin alloying in the tapping process of the intermediate frequency induction furnace to obtain molten steel;
a3: RH refining: adding molten steel into an RH refining furnace for refining, and if the RH approach temperature is more than or equal to 1580 ℃, not performing pure aluminum oxygen heating operation; if 1550 ℃ is less than or equal to RH arrival temperature less than 1580 ℃, performing pure aluminum oxide heating operation; after RH treatment reaches the highest vacuum degree, namely not more than 40pa, the circulation time is not less than 10min; the RH treatment sequence comprises pre-vacuumizing, aluminum oxide heating, decarburization, deoxidization, alloying, net circulation and emptying; the adding sequence of the alloy in RH treatment is sequentially metal aluminum, sulfur iron, silicon nitride iron, silicon iron and metal manganese; refining to obtain refined molten steel;
A4: casting the refined molten steel into a continuous casting blank by using a continuous casting process to obtain heavy cast silicon steel;
the steel scrap raw material comprises the following elements in percentage by mass: c is more than 0.003 percent and less than or equal to 0.07 percent; si is less than or equal to 4.5 percent; mn is more than or equal to 0.2% and less than or equal to 1.1%; p is less than or equal to 0.035%; s is more than 0.0020 percent and less than or equal to 0.01 percent; al < 0.6%; n is less than or equal to 0.01%; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities;
the recast silicon steel comprises the following elements in percentage by mass: c is more than or equal to 0.04% and less than or equal to 0.06%; si is more than or equal to 3.1 percent and less than or equal to 3.8 percent; mn is more than or equal to 0.07 percent and less than or equal to 0.25 percent; p is less than or equal to 0.020%; s is more than or equal to 0.008 percent and less than or equal to 0.015 percent; n is more than or equal to 0.008 percent and less than or equal to 0.09 percent; al is more than or equal to 0.010 percent and less than or equal to 0.030 percent; sn is less than or equal to 0.070; the total amount of Ti, nb, V and As is less than or equal to 0.01 percent; the balance of Fe and unavoidable impurities;
the screening process comprises the following steps:
b1: the screening rods (2) penetrate through the round holes (14), the screening rods (2) are uniformly arranged at the top of the vibrating screening machine (1), gaps between adjacent screening rods (2) are controlled, the fixing plates (15) are arranged by bolts, and the screening rods (2) are fixedly locked;
b2: the screw rod (18) is screwed by using a spanner, the sliding plate (19) is driven to move, the iron core (9) is driven to slide into the distance inside the inner cavity (11), the current of the coil (8) is regulated, and the hydraulic cylinder (21) is controlled to push the top conveyor belt (6) to descend to be close to the bottom conveyor belt (5);
B3: feeding oriented silicon steel or non-oriented silicon steel cold-rolled trimming materials, cold-impact leftovers and silicon steel waste rolls meeting element requirements into a feeding end of a vibrating screening machine (1), screening the sizes of the waste steel by the vibrating screening machine (1), enabling the waste steel meeting the requirements to pass through a screening rod (2) and fall onto a screening plate (3), screening dust impurities in the waste steel by the screening plate (3), enabling the waste steel meeting the size requirements to fall onto a bottom conveyor belt (5) through the screening plate (3), and discharging the waste steel with larger size out of the vibrating screening machine (1) through an oversized blanking port;
b4: the scrap steel meeting the size requirement is brought into the shell (4) by the bottom conveyor belt (5), the coil (8) and the iron core (9) are matched to generate magnetic force, the scrap steel with larger mass cannot be sucked up and falls into the overweight blanking opening (10), and the scrap steel is led out of the shell (4) by the blanking plate (24); the waste steel with the quality meeting the requirements is adsorbed on the surface of a baffle (17) and is driven to be transmitted by a top conveyor belt (6), the waste steel with the quality meeting the requirements is blocked by a blanking scraper (12) to fall onto the top surface of one bottom conveyor belt (5) far away from the vibration screening machine (1) and is conveyed out of a shell (4), and the waste steel meeting the requirements is obtained;
b5: introducing the waste steel with larger size and the waste steel with larger mass into a waste steel crusher to carry out crushing treatment, and sieving the treated waste steel again;
The recycling device comprises a size screening structure and a quality screening structure; the outlet of the size screening structure is communicated with the inlet of the quality screening structure;
the size screening structure comprises a vibrating screening machine (1), screening rods (2) and screening plates (3); a plurality of screening rods (2) are uniformly arranged at the top of the vibrating screening machine (1), a screening plate (3) is bolted to the middle of the vibrating screening machine (1), a plurality of through holes are uniformly formed in the middle of the screening plate (3), and an oversized blanking opening is formed in one side of the top of the vibrating screening machine (1);
the mass screening structure comprises a shell (4), a bottom conveyor belt (5), a top conveyor belt (6), a mounting seat (7), a coil (8) and an iron core (9); the vibrating screen comprises a shell (4), and is characterized in that bottom conveyor belts (5) are arranged at two ends of the bottom of the shell (4), an overweight blanking port (10) is formed in one side of the middle of the shell (4), the overweight blanking port (10) is located between the bottom conveyor belts (5) at two ends, the blanking ends of the screening plates (3) are communicated with the bottom conveyor belts (5) close to each other, a top conveyor belt (6) is arranged at the top of the shell (4), a plurality of mounting seats (7) are uniformly fixedly connected to the outer ring of the top conveyor belt (6), a plurality of inner cavities (11) are uniformly formed in the mounting seats (7), a coil (8) is fixedly connected to the inner outer ring of the inner cavities (11), an iron core (9) is arranged in the middle of the inner ring of the coil (8) and sleeved on the outer ring of the iron core (9), and a blanking scraper (12) is arranged at one end, far away from the vibrating screen (1), of the top of the shell (4);
The one side rigid coupling that top conveyer belt (6) was kept away from to mount pad (7) has baffle (17), and is adjacent contact each other between baffle (17), the bottom of unloading scraper blade (12) and the outer lane sliding fit of baffle (17), screw rod (18) are all installed in the rotation of both ends of baffle (17), the end and mount pad (7) of screw rod (18) rotate to be connected, both sides slidable mounting has slide (19) between screw rod (18), threaded sleeve (20) are installed to the outer lane screw thread of screw rod (18), the outer lane and slide (19) rigid coupling of threaded sleeve (20), the one side that slide (19) are close to mount pad (7) and the end rigid coupling of iron core (9), the outer wall of mount pad (7) is run through in iron core (9) slip.
2. An oriented silicon steel scrap recycling apparatus according to claim 1, characterized in that: the utility model discloses a vibrating screen machine, including vibrating screen machine (1), fixed plate (15) have evenly rigid coupling in top inner circle, a plurality of crossbeams (13) have all been seted up in top one side of crossbeam (13) and vibrating screen machine (1) a plurality of round holes (14), adjacent communicate between round hole (14), a plurality of inside slidable mounting screening rod (2) of round hole (14), the bolt in top one side of vibrating screen machine (1) has fixed plate (15), the one side that fixed plate (15) is close to vibrating screen machine (1) covers the outer lane at round hole (14), the end sliding fit of fixed plate (15) and screening rod (2).
3. An oriented silicon steel scrap recycling apparatus according to claim 1, characterized in that: the outer ring of the bottom conveyor belt (5) is uniformly fixedly connected with a plurality of anti-slip strips (16), and anti-slip lines are uniformly formed on the surfaces of the anti-slip strips (16).
4. An oriented silicon steel scrap recycling apparatus according to claim 1, characterized in that: the top both ends of casing (4) all are fixedly connected with pneumatic cylinder (21), the piston rod of pneumatic cylinder (21) slides and runs through the roof of casing (4), the top slidable mounting of casing (4) has roof (22), the top surface of roof (22) and the piston rod rigid coupling of pneumatic cylinder (21), the internally mounted top conveyer belt (6) of roof (22), the one end rigid coupling that vibration screening machine (1) was kept away from to roof (22) has a plurality of slide rails (23), the top and slide rail (23) sliding fit of unloading scraper blade (12), and the top of unloading scraper blade (12) is fixed with slide rail (23) through the bolt.
5. An oriented silicon steel scrap recycling apparatus according to claim 1, characterized in that: the inside rigid coupling of overweight feed opening (10) has flitch (24), and flitch (24) slope setting, the bottom of flitch (24) is provided with the spring.
CN202211446067.9A 2022-11-18 2022-11-18 Oriented silicon steel waste recycling method and recycling equipment Active CN116121626B (en)

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FR1368527A (en) * 1963-09-05 1964-07-31 Nordberg Manufacturing Co Vibrating screen
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CN115069723A (en) * 2022-06-23 2022-09-20 湖南信港实业有限公司 Slag fine aggregate processing production line

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