Method for increasing the speed of adding scrap steel to converter

Abstract

The embodiment of the present invention provides a method for increasing the speed of adding scrap steel to a converter, and relates to the field of steelmaking. The method aims to improve the problem of low speed of adding scrap steel to a converter. The method for increasing the speed of adding scrap steel to a converter comprises laying a first layer of scrap steel on the bottom of the scrap steel bucket along the direction from the bucket mouth to the bucket tail of the scrap steel bucket; laying a second layer of scrap steel on the first layer of scrap steel along the direction from the bucket mouth to the bucket tail of the scrap steel bucket, and the starting end of the first layer of scrap steel near the bucket mouth of the scrap steel bucket and the starting end of the second layer of scrap steel near the bucket mouth of the scrap steel bucket are stacked obliquely along the height direction of the scrap steel bucket. The first layer of scrap steel and the second layer of scrap steel are laid in sequence along the height direction from the bottom of the scrap steel bucket to the bucket surface, and one end of the scrap steel near the bucket mouth of the scrap steel bucket is inclined along the height direction of the scrap steel bucket, that is, the direction from the bottom of the bucket to the bucket surface, so that the scrap steel can be smoothly dumped into the furnace through the scrap steel bucket, and the furnace mouth is prevented from being blocked during the process of dumping the scrap steel into the furnace.

Description

Technical Field

[0001] The invention relates to the field of steelmaking, and in particular to a method for increasing the speed of adding scrap steel to a converter. Background Art

[0002] The patent with patent number 202023190760.3 specifically relates to a molten iron tank and scrap steel buffer device, which includes an installation base, a mounting bracket and a buffer hopper. The mounting bracket is fixedly installed on the ground through the installation base and is located on one side of the running track of the molten iron tank car. The buffer hopper is movably installed on the top of the mounting bracket through a hinge seat. The buffer hopper is hinged to the hydraulic cylinder hinged in the mounting bracket so that it can be flipped around the hinge seat. The inside of the buffer hopper is a chute for convenient loading and unloading of raw materials. A support platform is fixed inside the mounting bracket, and the support platform is supported and reinforced by multiple diagonal braces.

[0003] The patent with patent number 202122331178.2 belongs to the field of electric furnace steelmaking process and equipment technology, including a bulk material storage bin 1 arranged according to the flow direction of various bulk materials and receiving and discharging materials in sequence, a feeding device 2 under the storage bin, a weighing bucket 3, a weighing pressure head 4 under the weighing bucket, an electromagnetic vibrating feeder 5 and a material continuous conveying device 7, and also includes a material funnel 8 for collecting various bulk materials, and a material funnel weighing pressure head 9 under the material funnel that receives and discharges materials in sequence from the material funnel 8, a material continuous conveying device 2 10 and a receiving hopper 11 on the electric furnace cover; the number of bulk material storage bins 1 is adapted to the bulk materials, and the corresponding types of bulk materials are temporarily stored in the corresponding bulk material storage bins 1; it also includes an electric furnace computer control connected by a signal The control system 13 and the adding system PLC12, the electric furnace computer control system 13 and the adding system PLC12 are also connected to the material continuous conveying device 2 10, the weighing head 9 under the material hopper, the material continuous conveying device 1 7, the electromagnetic vibrating feeder 5, the weighing head 4 under the weighing bucket and the feeding device 2 under the storage bin through signals; the adding system PLC12 adjusts the feeding amount of different bulk materials in real time by controlling the electromagnetic force of each electromagnetic vibrating feeder 5 according to the different feeding requirements of various bulk materials proposed by the electric furnace computer control system 13, and detects and controls the feeding device 2 under the storage bin, the weighing head 4 under the weighing bucket, the electromagnetic vibrating feeder 5, the material continuous conveying device 1 7, the weighing head 9 under the material hopper and the material continuous conveying device 2 10.

[0004] The patent number 202111126193.1 is applied to the field of dosing control technology in the foundry industry. It includes variables for controlling the suction amount of the last plate of raw materials configured by the electromagnetic chuck to control and adjust the amount of raw materials sucked by the electromagnetic chuck. The variables of the suction amount include the dosing amount, the tolerance amount, and the redundancy amount; and in order to better control the blanking of the last plate of materials of the electromagnetic chuck, the dosing amount, the tolerance amount and the redundancy amount are formed by the following calculations to form four composite variables for controlling the blanking, and the composite variables are [dosing amount + tolerance amount + redundancy amount], [dosing amount + tolerance amount], [dosing amount] and [dosing amount tolerance amount]. Through the above technical solution, the electromagnetic chuck can directly position the weight of the absorbed raw materials near the dosing weight when sucking the last plate of raw materials, and the weight required for adding can be obtained after two vibration cycles of stabilization.

[0005] The above three patents have made improvements on the problem of increasing the speed of adding scrap steel. Their technical solutions have indeed achieved certain effects in a certain process, but none of them has been reflected in increasing the speed of adding scrap steel to the converter.

[0006] Steel mills proposed to save iron and increase steel, and to increase the iron-steel ratio, with the goal of achieving maximum benefits by increasing the amount of scrap steel added to the furnace. However, after increasing the amount of scrap steel added to the furnace, the time for adding scrap steel into the furnace has been extended. In addition to the slagging at the converter mouth, which has not been cleaned and has resulted in a small furnace mouth, the main reasons for affecting the speed of adding scrap steel into the converter are unreasonable assembly of the scrap steel bucket and incorrect methods of adding scrap steel into the converter by crane operation.

[0007] In the past, the assembly method of scrap steel bucket was: highly arbitrary, and the purpose was to assemble it to meet the weight requirements of converter production. Often, the scrap steel was higher than the scrap steel bucket surface, and all the large pieces were put in a pile, or even a pile of materials was directly put in the front half of the bucket, so that the scrap steel was blocked just after it was added to the furnace mouth, and the scrap steel could not be added to the furnace at all. In addition, some self-produced and purchased scrap steel did not meet the requirements. When assembling the scrap steel, the employees also put these overlong and oversized scrap steel that did not meet the requirements into the bucket.

[0008] The method of adding scrap steel into the converter by crane operation: After the crane operator hears the signal from the ground to add scrap steel, he often quickly lifts the auxiliary hook after the scrap steel bucket is placed at the furnace mouth. At this time, as long as the scrap steel bucket is slightly full, the scrap steel will be blocked at the furnace mouth, and the scrap steel will not be added into the converter at all. The whole process of adding scrap steel is extremely difficult. Summary of the invention

[0009] The objects of the present invention include, for example, providing a method for increasing the speed of adding scrap steel into a converter, which can improve the problem of low speed of adding scrap steel into the converter.

[0010] The embodiments of the present invention can be implemented as follows:

[0011] An embodiment of the present invention provides a method for increasing the speed of adding scrap steel to a converter, comprising:

[0012] Laying a first layer of scrap steel on the bottom of the scrap steel bucket from the bucket mouth to the bucket tail, wherein the first layer of scrap steel includes at least one of bulk material, crushed material, cut material, pig iron, round bar and threaded steel;

[0013] Laying a second layer of scrap steel on the first layer of scrap steel along the direction from the bucket mouth to the bucket tail of the scrap steel bucket, and the first layer of scrap steel near the starting end of the bucket mouth of the scrap steel bucket and the second layer of scrap steel near the starting end of the bucket mouth of the scrap steel bucket are stacked obliquely along the height direction of the scrap steel bucket, and the second layer of scrap steel includes steel briquettes and / or medium and heavy scrap;

[0014] Among them, when the second layer of scrap steel includes steel briquettes and medium and heavy scrap, the steel briquettes are laid on the first layer of scrap steel along the direction from the bucket mouth to the bucket tail of the scrap steel bucket, and the medium and heavy scrap are laid on the steel briquettes along the direction from the bucket mouth to the bucket tail of the scrap steel bucket.

[0015] In addition, the method for increasing the speed of adding scrap steel to a converter provided by the embodiment of the present invention may also have the following additional technical features:

[0016] Optionally, the first layer of scrap steel includes bulk material, crushed material, off-cut material and / or pig iron, round bars and / or threaded steel; the scrap steel bucket includes a first arrangement section, a second arrangement section and a third arrangement section which are sequentially connected from the bucket mouth to the bucket tail, the bulk material, the crushed material, the off-cut material and / or the pig iron are laid in the first arrangement section, and the round bars and / or the threaded steel are laid in the second arrangement section and the third arrangement section.

[0017] Optionally, the scrap steel bucket is provided with a front ear shaft and a rear ear shaft for hanging; the front ear shaft is closer to the bucket mouth of the scrap steel bucket than the rear ear shaft;

[0018] The first layer of scrap steel near the starting end of the scrap bucket and the second layer of scrap steel near the starting end of the scrap bucket are stacked obliquely along the height direction of the scrap bucket from the scrap bucket to the position of the front ear axis.

[0019] Optionally, the second layer of scrap steel includes steel briquettes, the laying height of the steel briquettes is lower than or equal to the setting height of the front ear axis and the rear ear axis, and the steel briquettes are laid in 1-2 layers from the bucket mouth to the bucket tail of the scrap steel bucket.

[0020] Optionally, the steel briquette includes a long side portion and a short side portion, and the long side portion of the steel briquette is arranged along the direction from the bucket mouth to the bucket tail of the scrap steel bucket.

[0021] Optionally, the second layer of scrap steel includes steel briquettes and medium and heavy scrap; one end of the steel briquettes close to the opening of the scrap steel bucket protrudes by at least two pieces relative to one end of the medium and heavy scraps close to the opening of the scrap steel bucket.

[0022] Optionally, the second layer of scrap steel includes steel briquettes and medium-sized scrap and heavy-sized scrap; the laying height of the medium-sized scrap and heavy-sized scrap is lower than the bucket surface of the scrap steel bucket.

[0023] Optionally, the medium waste and heavy waste are laid in a layer.

[0024] Optionally, the scrap steel bucket containing the scrap steel is operated to dump into the converter in a direction with a first inclination angle to a plane where a furnace mouth of the converter is located for a first preset time period;

[0025] The scrap steel bucket containing the scrap steel is operated to dump into the converter in a direction with a second inclination angle with respect to the plane where the furnace mouth is located for a second preset time period;

[0026] The scrap steel bucket containing the scrap steel is operated to dump into the converter in a direction with a third inclination angle with respect to the plane where the furnace mouth is located for a third preset time period;

[0027] The first inclination angle is less than the second inclination angle and less than the third inclination angle.

[0028] Optionally, the first inclination angle is 20-25°, and the second inclination angle is 35-40°.

[0029] The beneficial effects of the method for increasing the speed of adding scrap steel to a converter according to an embodiment of the present invention include, for example:

[0030] The method for increasing the speed of adding scrap steel to a converter comprises: laying a first layer of scrap steel on the bottom of a scrap steel bucket along the direction from the bucket mouth to the bucket tail of the scrap steel bucket, the first layer of scrap steel comprising at least one of bulk material, crushed material, cut material, pig iron, round rod and threaded steel; laying a second layer of scrap steel on the first layer of scrap steel along the direction from the bucket mouth to the bucket tail of the scrap steel bucket, and the starting end of the first layer of scrap steel near the bucket mouth of the scrap steel bucket and the starting end of the second layer of scrap steel near the bucket mouth of the scrap steel bucket are tilted and stacked along the height direction of the scrap steel bucket, the second layer of scrap steel comprises steel briquettes and / or medium and heavy scrap; wherein, when the second layer of scrap steel comprises steel briquettes and medium and heavy scrap, the steel briquettes are laid on the first layer of scrap steel along the direction from the bucket mouth to the bucket tail of the scrap steel bucket, and the medium and heavy scrap are laid on the steel briquettes along the direction from the bucket mouth to the bucket tail of the scrap steel bucket.

[0031] The first layer of scrap steel and the second layer of scrap steel are laid in sequence along the height direction from the bottom of the scrap steel bucket to the bucket surface. The end of the scrap steel close to the bucket mouth of the scrap steel bucket is inclined along the height direction of the scrap steel bucket, that is, from the bottom of the bucket to the bucket surface. The scrap steel can be smoothly dumped into the furnace through the scrap steel bucket, preventing the furnace mouth from being blocked during the process of dumping the scrap steel into the furnace, thereby increasing the speed of adding scrap steel to the converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A flowchart of the steps of assembling a scrap steel bucket in a method for increasing the scrap steel feeding rate of a converter provided by an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the assembly of scrap steel in a scrap steel bucket provided by an embodiment of the present invention;

[0035] Figure 3 A flowchart of the steps of adding scrap steel into a converter in the method for increasing the speed of adding scrap steel into a converter provided in an embodiment of the present invention.

[0036] Icon: 100- scrap bucket; 110- bucket mouth; 120- bucket bottom; 130- front ear shaft; 140- rear ear shaft. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0042] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0043] Combine the following Figures 1 to 3 The method for increasing the speed of adding scrap steel to a converter provided in this embodiment is described in detail.

[0044] Please refer to Figure 1 as well as Figure 2 , an embodiment of the present invention provides a method for increasing the speed of adding scrap steel to a converter, comprising:

[0045] Step a1, laying a first layer of scrap steel on the bottom of the scrap steel bucket 100 from the bucket mouth 110 to the bucket tail of the scrap steel bucket 100, wherein the first layer of scrap steel includes at least one of bulk material, crushed material, cut material, pig iron, round rod and threaded steel;

[0046] Step a2, laying a second layer of scrap steel on the first layer of scrap steel along the direction from the bucket mouth 110 to the bucket tail of the scrap steel bucket 100, and the starting end of the first layer of scrap steel near the bucket mouth 110 of the scrap steel bucket 100 and the starting end of the second layer of scrap steel near the bucket mouth 110 of the scrap steel bucket 100 are tilted and stacked along the height direction of the scrap steel bucket 100, and the second layer of scrap steel includes steel briquettes and / or medium and heavy scraps;

[0047] Among them, when the second layer of scrap steel includes steel briquettes and medium and heavy scrap, the steel briquettes are laid on the first layer of scrap steel along the direction from the bucket mouth 110 to the bucket tail of the scrap steel bucket 100, and the medium and heavy scrap are laid on the steel briquettes along the direction from the bucket mouth 110 to the bucket tail of the scrap steel bucket 100.

[0048] In this embodiment, there are six types of "bulk materials, crushed materials, off-cut materials, pig iron, round bars and threaded steel", and "at least one" includes one, two, three, four, five or six types. The first layer of scrap steel is light in weight, and is used to reduce the friction between the second layer of scrap steel and the bottom of the scrap steel bucket 100, so as to facilitate the smooth dumping of the second layer of scrap steel into the furnace. It should be noted that the first layer of scrap steel includes at least one of bulk materials, crushed materials, off-cut materials, pig iron, round bars and threaded steel, which only limits the types of scrap steel included in the first layer of scrap steel, and does not mention how many pieces are included. The specific number of pieces can be set according to the number of layers of the specific type of scrap steel. Among them, the layer mentioned in this embodiment refers to a plurality of pieces of this type of scrap steel laid out in sequence, that is, a layer, that is, the height of a piece of this type of scrap steel.

[0049] "The second layer of scrap steel includes steel briquettes and / or medium scrap and heavy scrap" includes three situations: the second layer of scrap steel includes steel briquettes but does not include medium scrap and heavy scrap, and the steel briquettes are laid on the first layer of scrap steel; the second layer of scrap steel does not include steel briquettes but includes medium scrap and heavy scrap, and the medium scrap and heavy scrap are laid on the first layer of scrap steel; the second layer of scrap steel includes steel briquettes and also includes medium scrap and heavy scrap, and the steel briquettes are laid on the first layer of scrap steel, and the medium scrap and heavy scrap are laid on the steel briquettes.

[0050] That is, the first layer of scrap steel and the second layer of scrap steel are laid in sequence along the height direction from the bottom 120 of the scrap steel bucket 100 to the bucket surface. The end of the scrap steel close to the bucket mouth 110 of the scrap steel bucket 100 is inclined along the height direction of the scrap steel bucket 100, that is, from the bottom 120 to the bucket surface. This allows the scrap steel to be smoothly dumped into the furnace through the scrap steel bucket 100, preventing the furnace mouth from being blocked during the process of dumping the scrap steel into the furnace.

[0051] Reference Figure 2 In this embodiment, the first layer of scrap steel includes bulk material, crushed material, off-cut material and / or pig iron, round bars and / or threaded steel; the scrap steel bucket 100 includes a first arrangement section, a second arrangement section and a third arrangement section which are sequentially connected in the direction from the bucket mouth 110 to the bucket tail, and the bulk material, crushed material, off-cut material and / or pig iron are laid in the first arrangement section, and the round bars and / or threaded steel are laid in the second arrangement section and the third arrangement section.

[0052] “The first layer of scrap steel includes bulk material, crushed material, off-cut material and / or pig iron, round bars and / or rebar” means that the first layer of scrap steel includes bulk material, crushed material, off-cut material, pig iron, round bars and rebar; or the first layer of scrap steel includes bulk material, crushed material, off-cut material and round bars; or the first layer of scrap steel includes bulk material, crushed material, off-cut material and rebar; or the first layer of scrap steel includes bulk material, crushed material, pig iron and round bars; or the first layer of scrap steel includes bulk material, crushed material, pig iron and rebar.

[0053] Bulk materials, crushed materials, cut materials and / or pig iron are laid at the front end of the scrap bucket 100. "Cut materials and / or pig iron" include cut materials, or pig iron, or cut materials and pig iron. Round bars and / or threaded steel bars are laid at the middle and rear end of the scrap bucket 100. "Round bars and / or threaded steel bars" include round bars, or threaded steel bars, or round bars and threaded steel bars.

[0054] Reference Figure 2 , refer to Figure 2 Bulk materials, crushed materials, off-cut materials and / or pig iron are laid out in a disorderly manner, and round bars and / or threaded steel bars are arranged in sequence, but the tops of the bulk materials, crushed materials, off-cut materials and / or pig iron, round bars and / or threaded steel bars are approximately flush.

[0055] Specifically, bulk material assembly: the first few trays of about 3-4t of base material (bulk material, crushed material, pellets or pig iron) for scrap steel loading should be loaded into the front half of the scrap steel bucket 100, which is conducive to the front half of the scrap steel sliding into the furnace first when adding scrap steel to the converter. Round bar and threaded steel assembly: trimmed and self-produced steel bars and round bars must be loaded into the bucket bottom 120 first and the trolley must be started to spread before magnetization to avoid cross blocking.

[0056] Reference Figure 2 In this embodiment, the scrap bucket 100 is provided with a front ear shaft 130 and a rear ear shaft 140 for hanging; the front ear shaft 130 is closer to the bucket mouth 110 of the scrap bucket 100 relative to the rear ear shaft 140; the starting end of the first layer of scrap steel close to the bucket mouth 110 of the scrap bucket 100 and the starting end of the second layer of scrap steel close to the bucket mouth 110 of the scrap bucket 100 are stacked obliquely along the height direction of the scrap bucket 100 from the bucket mouth 110 of the scrap bucket 100 to the position of the front ear shaft 130.

[0057] There should be space between the bucket mouth 110 and the front ear shaft 130 of the scrap bucket 100, and the slope should be maintained at an angle of about 45 degrees, and the slope should be gradually increased from low to high by paving the middle and tail of the bucket. The front ear shaft 130 is set at the front end of the scrap bucket 100, and the rear ear shaft 140 is set at the rear end of the scrap bucket 100. Figure 2 The relative position in the figure is introduced. In the length direction from the bucket mouth 110 to the front ear axis 130, the front end of the scrap steel is set in an inclined manner from the lower left to the upper right.

[0058] Reference Figure 2 In this embodiment, the second layer of scrap steel includes steel briquettes, the laying height of the steel briquettes is lower than or equal to the setting height of the front ear axis 130 and the rear ear axis 140, and the steel briquettes are laid in 1-2 layers from the bucket mouth 110 to the bucket tail of the scrap steel bucket 100.

[0059] The arrangement height of the steel briquette can only reach the height of the front ear axis 130 and the rear ear axis 140 at most, and cannot exceed. It should be noted that in this embodiment, the height mentioned in the text refers to the direction from the bucket bottom 120 to the bucket mouth 110 of the scrap steel bucket 100.

[0060] Reference Figure 2 In this embodiment, the steel briquette includes a long side portion and a short side portion, and the long side portion of the steel briquette is arranged along the direction from the bucket mouth 110 to the bucket tail of the scrap steel bucket 100.

[0061] The steel briquette can only be placed horizontally, not vertically, otherwise it will be too high and it is easy to block the furnace mouth when the scrap steel bucket 100 is dumped into the furnace.

[0062] Specifically, steel briquette assembly: only one layer of briquette is installed from the scrap bucket 100 opening to the front ear axis 130 of the scrap bucket 100, and at most two layers of briquette are installed. The briquette cannot be installed vertically, and the rest is filled with "medium waste" scrap steel to the height of the ear axis position. It is not allowed to assemble above the bucket surface. The steel briquette should be installed in the middle and rear positions of the scrap bucket 100.

[0063] Reference Figure 2 In this embodiment, the second layer of scrap steel includes steel briquettes and medium and heavy scrap; one end of the steel briquettes close to the bucket opening 110 of the scrap steel bucket 100 protrudes at least two pieces relative to the other end of the medium and heavy scraps close to the bucket opening 110 of the scrap steel bucket 100.

[0064] by Figure 2 The relative position of the steel briquette is introduced. Two steel briquettes are set relative to the medium and heavy scrap. If there is only one piece, the scrap steel behind will easily reach the furnace mouth and block the furnace mouth; if there are two pieces, the second piece actually prevents the scrap steel behind from blocking the furnace mouth all at once. This can ensure the smooth entry of scrap steel into the furnace.

[0065] Reference Figure 2 In this embodiment, the second layer of scrap steel includes steel briquettes and medium and heavy scrap steel; the laying height of the medium and heavy scrap steel is lower than the bucket surface of the scrap steel bucket 100. After all the scrap steel is stacked, the total height is lower than the bucket surface, ensuring construction safety.

[0066] Reference Figure 2 In this embodiment, medium waste and heavy waste are laid in one layer. In this embodiment, steel briquettes are laid in one layer, that is, the laying height is the height of one steel briquette, and at the same time, medium waste and heavy waste are also laid in one layer.

[0067] Reference Figure 3 In this embodiment, in step b1, the scrap steel bucket 100 containing scrap steel is operated to dump into the converter in a direction with a first inclination angle with respect to the plane where the furnace mouth of the converter is located for a first preset time period;

[0068] Step b2, operating the scrap steel bucket 100 containing scrap steel to pour into the converter in a direction with a second inclination angle with respect to the plane where the furnace mouth is located for a second preset time period;

[0069] Step b3, operating the scrap steel bucket 100 containing scrap steel to dump into the converter in a direction with a third inclination angle to the plane where the furnace mouth is located for a third preset time period;

[0070] Among them, the first inclination angle is less than the second inclination angle and less than the third inclination angle.

[0071] After the scrap steel bucket 100 is loaded, the scrap steel bucket 100 is placed on the furnace mouth and dumped in stages to ensure smooth entry without blocking the furnace mouth, thereby increasing the acceleration of the scrap steel in the heating furnace.

[0072] In this embodiment, the first inclination angle is 20-25°, and the second inclination angle is 35-40°.

[0073] Method of adding scrap steel into converter by crane operation: Strictly implement the "three starts and two stops" operation method to avoid the bucket from getting stuck at the furnace mouth. One start: When the scrap steel bucket 100 is placed at the furnace mouth, the crane auxiliary hook is lifted at the 2nd or 3rd gear speed until the scrap steel bucket 100 forms an angle of 20 degrees with the plane of the furnace mouth, and then pauses for 3 seconds, so that the bulk materials, crushed materials, pellets or pig iron at the bucket mouth 110.5 meters, and the two briquettes in front can be added to the furnace in an orderly manner; Two starts: Then continue to lift the hook at the 2nd gear speed until the scrap steel bucket 100 forms an angle of 35-40 degrees with the plane of the furnace mouth, and then pauses for 6 seconds. All the scrap steel bucket 100 For materials such as briquettes, since there is no resistance in front of the scrap steel bucket 100 and there is enough space for entering the furnace, the heavy materials on the upper layer in front will reach the scrap steel bucket 100 faster than the bulk materials, crushed materials, pellets or pig iron on the lower layer due to the effect of gravity. At the same time, with the help of the bulk materials, crushed materials, pellets or pig iron on the lower layer, they are added into the furnace in sequence. At the same time, observe whether there is any scrap steel in the scrap steel bucket 100. If there is; three lifts: continue to lift at a speed of 2nd or 3rd gear until all are added.

[0074] According to a method for increasing the speed of adding scrap steel to a converter provided in this embodiment, the working principle of the method for increasing the speed of adding scrap steel to a converter is:

[0075] Bulk material assembly: about 3-4t of base material (bulk material, crushed material, pelletized or pig iron) is loaded into the front half of the scrap bucket 100, which is conducive to the front half of the scrap steel sliding into the furnace first when adding scrap steel to the converter. Round bar and threaded steel assembly: trimmed and self-produced steel bars and round bars must be loaded into the bucket bottom 120 first and the trolley must be started to spread before magnetization to avoid cross blocking. Steel briquette assembly: only one layer of briquette is loaded from the mouth of the scrap bucket 100 to the front ear axis 130 of the scrap bucket 100, and at most two layers. Steel briquette cannot be installed vertically. The rest is filled with "medium waste" scrap steel to the height of the ear axis position. It is not allowed to assemble above the bucket surface. There should be space between the bucket mouth 110 and the front ear axis 130 of the scrap bucket 100, and the inclined surface should be maintained at an angle of about 45 degrees. The briquette is paved in turn to the middle and tail of the scrap bucket 100 to form an inclined surface that increases from low to high. Steel briquettes should be installed in the middle and rear of the scrap bucket 100. Middle scrap assembly: Middle scrap should be laid on top of the steel briquettes. Self-produced scrap: When the operator finds that the volume of self-produced scrap is too large, it shall not be loaded into the bucket, and feedback shall be immediately given to the scrap team to measure on site. Sorting of scrap in the bucket: When the scrap exceeds the bucket surface and needs to be sorted, the magnetic disk slowly approaches the scrap and then attracts the magnet. The magnetic disk shall not be used to press the scrap.

[0076] Precautions when loading and matching buckets: Strictly follow the steps one by one, and do not change the matching order at will. If you find oversized materials, you must not load them on the truck, and immediately select them and place them on one side of the material span, with obvious separation compared to the standard materials. At the same time, notify the shift to arrange for processing to the outdoor span as soon as possible, waiting for processing. When matching several types of flat materials, pay attention to loosening the magnet on the suction plate while moving the trolley to spread the scrap steel as flat as possible. The pile of materials in the middle front near the scrap steel bucket 100 bucket mouth 110 should not be too high, and can be appropriately spread out to the 1.5 meters reserved before.

[0077] The method for increasing the speed of adding scrap steel to a converter provided in this embodiment has at least the following advantages:

[0078] The first layer of scrap steel and the second layer of scrap steel are laid in sequence along the height direction from the bottom 120 of the scrap steel bucket 100 to the bucket surface. The end of the scrap steel close to the bucket mouth 110 of the scrap steel bucket 100 is inclined along the height direction of the scrap steel bucket 100, that is, from the bottom 120 to the bucket surface. This allows the scrap steel to be smoothly dumped into the furnace through the scrap steel bucket 100, preventing the furnace mouth from being blocked during the process of dumping the scrap steel into the furnace.

[0079] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for increasing the speed of adding scrap steel to a converter, characterized in that: include: Laying a first layer of scrap steel on the bottom of the scrap steel bucket (100) in a direction from the bucket mouth (110) to the bucket tail of the scrap steel bucket (100), wherein the first layer of scrap steel comprises at least one of crushed material, round bars and threaded steel; Laying a second layer of scrap steel on the first layer of scrap steel along a direction from the bucket opening (110) to the bucket tail of the scrap steel bucket (100), and the starting end of the first layer of scrap steel close to the bucket opening (110) of the scrap steel bucket (100) and the starting end of the second layer of scrap steel close to the bucket opening (110) of the scrap steel bucket (100) are stacked obliquely along the height direction of the scrap steel bucket (100), and the second layer of scrap steel includes steel briquettes and / or medium and heavy scrap; Wherein, when the second layer of scrap steel includes steel briquettes and medium and heavy scrap, the steel briquettes are laid on the first layer of scrap steel along a direction from the bucket opening (110) to the bucket tail of the scrap steel bucket (100), and the medium and heavy scrap are laid on the steel briquettes along a direction from the bucket opening (110) to the bucket tail of the scrap steel bucket (100); The scrap steel bucket (100) is provided with a front ear shaft (130) and a rear ear shaft (140) for hanging; the front ear shaft (130) is closer to the bucket opening (110) of the scrap steel bucket (100) relative to the rear ear shaft (140); A space is left between the bucket mouth (110) and the front trunnion (130) of the scrap steel bucket (100), and a 45-degree inclined surface is maintained, and the inclined surfaces are successively paved toward the middle and the tail of the bucket to form an inclined surface that increases from low to high. The front trunnion (130) is arranged at the front end of the scrap steel bucket (100), and the rear trunnion (140) is arranged at the rear end of the scrap steel bucket (100).

2. The method for increasing the speed of adding scrap steel to a converter according to claim 1, characterized in that: The first layer of scrap steel includes crushed materials, round bars and rebars; The scrap steel bucket (100) comprises a first arrangement section, a second arrangement section and a third arrangement section which are sequentially connected in a direction from the bucket mouth (110) to the bucket tail, the crushed material is laid in the first arrangement section, and the round bars and the threaded steel bars are laid in the second arrangement section and the third arrangement section.

3. The method for increasing the speed of adding scrap steel to a converter according to claim 1, characterized in that: The first layer of scrap steel having a starting end close to the bucket mouth (110) of the scrap steel bucket (100) and the second layer of scrap steel having a starting end close to the bucket mouth (110) of the scrap steel bucket (100) are stacked obliquely along the height direction of the scrap steel bucket (100) from the bucket mouth (110) of the scrap steel bucket (100) to the position of the front ear axis (130).

4. The method for increasing the speed of adding scrap steel to a converter according to claim 3, characterized in that: The second layer of scrap steel comprises steel briquettes, the laying height of the steel briquettes being lower than or equal to the setting height of the front ear shaft (130) and the rear ear shaft (140), and the steel briquettes being laid in 1-2 layers in a direction from the bucket mouth (110) to the bucket tail of the scrap steel bucket (100).

5. The method for increasing the speed of adding scrap steel to a converter according to claim 4, characterized in that: The steel pressing block comprises a long side portion and a short side portion, and the long side portion of the steel pressing block is arranged along a direction from the bucket mouth (110) to the bucket tail of the scrap steel bucket (100).

6. The method for increasing the speed of adding scrap steel to a converter according to claim 1, characterized in that: The second layer of scrap steel includes steel briquettes and medium and heavy scrap; one end of the steel briquettes close to the bucket opening (110) of the scrap steel bucket (100) protrudes by at least two pieces relative to one end of the medium and heavy scraps close to the bucket opening (110) of the scrap steel bucket (100).

7. The method for increasing the speed of adding scrap steel to a converter according to claim 6, characterized in that: The second layer of scrap steel comprises steel briquettes and medium and heavy scrap; the laying height of the medium and heavy scrap is lower than the bucket surface of the scrap steel bucket (100).

8. The method for increasing the speed of adding scrap steel to a converter according to claim 7, characterized in that: The medium waste and heavy waste are laid in a layer.

9. The method for increasing the speed of adding scrap steel to a converter according to any one of claims 1 to 8, characterized in that: The scrap steel bucket (100) containing the scrap steel is operated to dump the scrap steel into the converter in a direction with a first inclination angle with respect to the plane where the furnace mouth of the converter is located for a first preset time period; Operating the scrap steel bucket (100) containing the scrap steel to pour into the converter in a direction with a second inclination angle with respect to the plane where the furnace mouth is located for a second preset time period; Operating the scrap steel bucket (100) containing the scrap steel to dump the scrap steel into the converter in a direction with a third inclination angle to the plane where the furnace mouth is located for a third preset time period; The first inclination angle is less than the second inclination angle and less than the third inclination angle.

10. The method for increasing the speed of adding scrap steel to a converter according to claim 9, characterized in that: The first inclination angle is 20-25°, and the second inclination angle is 35-40°.

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