Micro-powder carburant adding device and working method thereof

Abstract

The invention relates to the technical field of steelmaking, in particular to a micro-powder carburant adding device and a working method thereof.The micro-powder carburant adding device comprises a stock bin used for storing a carburant; the charging hole is formed in the top of the stock bin and is used for supplementing a carburant to the stock bin; the charging opening cover can be screwed with the charging opening through a gland or a thread structure to realize sealing and is used for sealing the stock bin; the vibration feeder is located at the bottom of the stock bin and controls discharging of materials in the stock bin; the material level detector is used for detecting whether materials exist in the injection tank or not; the injection pipe is fixed through a steel rope or a support, one end of the injection pipe stretches into molten steel of the steel ladle in the material adding process, and the injection pipe is taken out of the steel ladle after material adding is completed; one end of the metal hose is connected with the injection tank, the other end of the metal hose is connected with one end, far away from molten steel, of the injection pipe, and joints of two ends of the metal hose are fastened; and the gas storage tank is used for storing argon. The problem that the fine powdery carburant is difficult to add into the molten steel is solved, and the purpose of effective recarburization can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steelmaking, and particularly relates to a micro-powdered carbon additive adding device and a working method thereof. BACKGROUND

[0002] In the smelting process of steel products, the smelting loss of carbon elements in the molten iron is increased due to factors such as long smelting time, holding time and overheating time, so that the carbon content in the molten iron is reduced, and the carbon content in the molten iron cannot reach the expected theoretical value. In order to make up the carbon content burned in the steel smelting process, a carbon-containing substance is added, which is called carbon additive.

[0003] Generally, the particle size of the carbon additive is required to be controlled within 3mm to 8mm, and the weight exceeding the upper and lower limits cannot exceed 5% of the total weight, and the maximum particle size cannot be greater than 15mm. However, a lot of fine powder is generated in the preparation, storage and transportation of the carbon additive, and other substances such as graphite powder and biomass, and the fixed carbon content is usually greater than or equal to 90%, and the particle size is less than 3mm. The current carbon additive adding usually adopts a chute adding method, and the powder is easy to produce dust problems in the process of metering and adding, and the fine powder is blown away or sucked away by fluctuating air flow and cannot be added into the molten steel. At the same time, even if the fine powder is added into the molten steel, the fine powder floats on the surface of the molten steel and is easy to burn with oxygen, so the effect of carbon addition cannot be achieved.

[0004] Therefore, it is necessary to provide an adding device capable of adding fine-powdered carbon additive into molten steel. SUMMARY

[0005] According to the above technical problems, a micro-powdered carbon additive adding device and a working method thereof are provided. The present application mainly utilizes a scanning imaging radar to measure the volume of the material in the stock bin, and utilizes a controller to control the adding amount and valve switch of the carbon additive, so that the fine-powdered carbon additive is added on the basis of the existing equipment.

[0006] The technical means adopted by the present application are as follows: The micro-powdered recarburizer adding device comprises a bin for storing recarburizer, a charging port arranged at the top of the bin for supplementing recarburizer to the bin, a charging port cover capable of being screwed with the charging port to realize sealing and used for closing the bin, a vibrating feeder located at the bottom of the bin for controlling the discharging of the material in the bin, a valve a located between the vibrating feeder and a blowing tank for controlling the required adding amount of the powdered recarburizer, a level detector located at the flange upper edge of the valve b for detecting whether there is material in the blowing tank, a valve b located between the blowing tank and a metal hose for controlling the actual adding amount of the micro-powdered recarburizer, a valve c located between a gas storage tank and the blowing tank for controlling the flow rate of the micro-powdered recarburizer, a blowing pipe fixed by a steel rope or a support, one end of the blowing pipe being inserted into the molten steel in the ladle during the adding process and being taken out of the ladle after the adding is completed, the metal hose having one end connected with the blowing tank and the other end connected with the end of the blowing pipe away from the molten steel, and the connection positions of the two ends of the metal hose being fastened, and a gas storage tank for storing argon.

[0007] Further, the micro-powdered recarburizer adding device further comprises a scanning imaging radar, which scans the material in the bin in real time and detects the volume of the material in real time.

[0008] Further, the micro-powdered recarburizer adding device further comprises a controller, which is used for receiving the volume of the material measured by the scanning imaging radar in real time, receiving the signal of the level detector detecting whether there is material in the blowing tank, and issuing instructions to control the opening and closing of the valve a, the valve b and the valve c and the starting and stopping of the vibrating feeder.

[0009] Further, the depth of the end of the blowing pipe inserted into the molten steel in the ladle is controlled to be within the range of 100mm-1000mm.

[0010] The application further provides a working method of the micro-powdered recarburizer adding device. The application further provides a working method of the micro-powdered recarburizer adding device. M=(C2-C1)×M0 / C0 The vibrating feeder is started, the valve a is opened, and the micro-powdered recarburizer enters the blowing tank from the bin; one end of the blowing pipe is inserted into the molten steel in the ladle to a depth of 100mm-1000mm; when the real-time volume of the material detected by the scanning imaging radar reaches the preset value When the controller receives the signal change from having to not having from the ladle level detector detecting the injection tank level signal, the controller sends valve b and valve c closing instructions, and lifts the injection pipe from the ladle.

[0011] Further, the preset value of the real-time material volume amount The calculation method is as follows: = -(C2-C1) x M0 / (C0 x ) Wherein, M0 represents the material volume amount before the stock bin adds the carbon additive to the ladle, M0 represents the bulk density of the fine powdery carbon additive in the stock bin.

[0012] Compared with the prior art, the present application has the following advantages: The fine powdery carbon additive adding device and the working method thereof provided by the present application solve the problem of difficult addition of fine powdery carbon additive into molten steel, and can achieve the purpose of effective carbonization. The device is a closed system during the addition process, and there is no problem of dust overflow. The scanning imaging radar and the controller solve the problems of accurate metering and accurate addition of fine powdery carbon additive.

[0013] The device of the present application uses a carbon steel pipe as an addition channel, so that the carbon additive enters the inside of the molten steel, reduces the loss caused by the combustion of the carbon additive on the surface of the molten steel, and fully utilizes the large surface area of the fine powdery carbon additive, greatly improves the carbonation speed, and shortens the carbonation time. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0015] Figure 1 The structure diagram of the fine powdery carbon additive adding device in the present application.

[0016] In the figure: 1, charging port cover; 2, charging port; 3, stock bin; 4, vibrating feeder; 5, valve a; 6, injection tank; 7, level detector; 8, valve b; 9, metal hose; 10, injection pipe; 11, ladle; 12, scanning imaging radar; 13, valve c; 14, gas storage tank; 15, controller. DETAILED DESCRIPTION

[0017] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0018] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0020] Unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in the embodiments are not meant to limit the scope of the present application. At the same time, it should be clear that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportion relationship. The technology, methods and devices known to those skilled in the relevant art can not be discussed in detail, but should be considered as part of the specification in appropriate cases. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0021] As Figure 1As shown, the present invention provides a micro-powdered carburizing agent addition device, comprising: a silo 3 for storing carburizing agent; a loading port 2 located at the top of the silo 3 for adding carburizing agent to the silo 3; a loading port cover 1, which can be sealed to the loading port 2 by means of a pressure cap or a threaded structure, for sealing the silo 3; a vibrating feeder 4 located at the bottom of the silo 3 for controlling the material discharge from the silo 3; a material level detector 7 located at the upper edge of the flange on valve b8 for detecting whether there is material in the injection tank 6; an injection pipe 10 fixed by a steel rope or bracket, one end of the injection pipe being inserted into the molten steel in the ladle 11 during the material addition process, and removed from the ladle 11 after the material addition is completed; a metal hose 9, one end of which is connected to the injection tank 6, and the other end of which is connected to the end of the injection pipe 10 away from the molten steel, and both ends of the metal hose 9 are tightened; and a gas storage tank 14 for storing argon gas.

[0022] Valve a5, located between vibrating feeder 4 and spray tank 6, is used to control the required amount of powdered recarburizer added; valve b8, located between spray tank 6 and metal hose 9, is used to control the actual amount of micro powdered recarburizer added; valve c13, located between air storage tank 14 and spray tank 6, is used to control the flow rate of micro powdered recarburizer. In a specific implementation, as a preferred embodiment of the present invention, the micro powdered carbon raiser addition device further includes a scanning imaging radar 12, which scans the material in the silo in real time and detects the volume of the material in real time.

[0023] In a specific implementation, as a preferred embodiment of the present invention, the micro powdered carbon raiser addition device further includes a controller 15. The controller is used to receive the material volume measured in real time by the scanning imaging radar 12, the material level detector to detect whether there is a material level signal in the blowing tank 6, and to issue commands to control the opening and closing of valves a5, b8, and c13 and the start and stop of the vibrating feeder 4.

[0024] In a specific implementation, as a preferred embodiment of the present invention, the depth of the end of the injection pipe 10 inserted into the molten steel in the ladle is controlled within the range of 100mm-1000mm. The pipe material can be made of high-temperature resistant materials such as magnesium-calcium (MgO-CaO) pipe, magnesium-zirconium (MgO-ZrO2) pipe, magnesium-aluminum spinel (MgO-Al2O3) pipe, aluminum-carbon (Al2O3-C) pipe, or heat-resistant seamless steel pipe.

[0025] This invention also provides a method for operating a micro-powdered carbon raiser addition device, specifically including: loading the micro-powdered carbon raiser into the silo 3 through the loading port 2 and closing the loading port cover 1; valves a5, b8, and c13 are in the closed state, and the volume of material detected by the scanning imaging radar 12 is recorded. ;Preset known bulk density of micro-powdered carbon raiser in silo 3 (kg / m 3 Calculate the required mass of carbon recarburizer to be added based on the following: carbon content C0 (%) of the powdered recarburizer, weight M0 (kg) of the molten steel to be added to the ladle, initial carbon content C1 (%) of the molten steel, and target carbon content C2 (%). M = (C2 - C1) × M0 / C0 Start the vibrating feeder 4 and open valve a5. The micro-powdered carburizing agent enters the injection chamber 6 from the silo 3; one end of the injection pipe 10 is inserted into the molten steel in the ladle 11 to a depth of 100mm-1000mm; when the real-time material volume detected by the scanning imaging radar 12 reaches the preset value... At that time, the controller 15 issues a command to close valve a5 and stop vibrating feeder 4, and at the same time issues commands to open valve b8 and valve c13; when the controller 15 receives a signal change from the presence to the absence of the material level signal detected by the material level detector 7, the controller 15 issues a command to close valve b8 and valve c13, and lifts the blow pipe 10 from the ladle 11.

[0026] In a specific implementation, as a preferred embodiment of the present invention, the preset value of the real-time material volume is... The calculation method is as follows: = -(C2-C1)×M0 / (C0× ) in, This indicates the volume of material (m³) before the carburizer is added from the silo to the ladle. 3 ), This indicates the bulk density of the powdered carbon raiser in the silo (kg / m³). 3 C0 represents the fixed carbon content (%) of the micronized carbon raiser, M0 represents the weight (kg) of molten steel to be added to the ladle, C1 represents the initial carbon content (%) of the molten steel in the ladle, and C2 represents the target carbon content (%) of the molten steel in the ladle.

[0027] Example like Figure 1 As shown, the present invention provides a method for operating a micronized carbon raiser addition device, the specific operating steps of which are as follows: 1) Detect the bulk density of the micro powdered carbon raiser 800kg / m 3 The micronized carbon raiser has a fixed carbon content of C0=90%, a planned addition weight of molten steel to the ladle M0=200000kg, an initial carbon content of molten steel C1=1.0%, and a target carbon content C2=1.5%. 2) Load the micro-powdered carbon raiser into the silo through the loading port and close the loading port cover; 3) With valves a, b, and c in the closed state, record the volume of material detected by the scanning imaging radar. 20m 3 ; 4) Start the vibrating feeder and open valve a. The fine powdered carbon raiser enters the injection chamber from the silo. 5) Insert one end of the blowpipe into the molten steel in the ladle to a depth of 100mm-1000mm; 6) When the real-time material volume detected by the scanning imaging radar reaches the preset value 18.6m 3 At that time, the controller sends a command to close valve a and stop the vibrating feeder, and simultaneously sends commands to open valves b and c. 7) When the controller receives a signal change from the presence to absence of the material level signal detected by the material level detector in the blow tank, the controller issues a command to close valves b and c and lifts the blow pipe from the ladle.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fine powdered recarburizer adding device characterized by comprising: It comprises: a bin for storing recarburizer; a charging port provided at the top of the bin for supplementing recarburizer to the bin; a charging port cover capable of being screwed with the charging port to achieve sealing, for closing the bin; a vibrating feeder located at the bottom of the bin for controlling the discharge of materials in the bin; a valve a located between the vibrating feeder and the injection tank for controlling the required amount of powdered recarburizer to be added; a level detector located at the upper flange of valve b for detecting whether there is material in the injection tank; a valve b located between the injection tank and the metal hose for controlling the actual amount of micro-powdered recarburizer to be added; a valve c located between the gas storage tank and the injection tank for controlling the flow rate of micro-powdered recarburizer; an injection pipe fixed by a steel rope or a support, one end of which is inserted into the molten steel in the ladle during the feeding process, and is taken out of the ladle after the feeding is completed; a metal hose having one end connected with the injection tank and the other end connected with the end of the injection pipe away from the molten steel, and the connection between the two ends of the metal hose is fastened; a gas storage tank for storing argon.

2. The fine-carburettant adding device according to claim 1, characterized by The micro-powdered recarburizer adding device further comprises a scanning imaging radar, which scans the materials in the bin in real time and detects the volume of the materials in real time.

3. The fine-carburettant-adding device according to claim 1, characterized in that The micro-powdered recarburizer adding device further comprises a controller, which is used to receive the volume of the materials measured by the scanning imaging radar in real time, the signal of the level detector detecting whether there is material in the injection tank, and issue instructions to control the opening and closing of valve a, valve b and valve c and the starting and stopping of the vibrating feeder.

4. The fine-carburetant adding device according to claim 1, wherein The depth of the end of the injection pipe inserted into the molten steel in the ladle is controlled within the range of 100mm-1000mm.

5. A method of operating a pulverized recarburizer adding device according to any one of claims 1 to 4, characterized by, Specifically, it comprises: Pre-set known bulk density of fine powdered recarburizer in bin , the fixed carbon content Co of the fine powdered recarburizer, the steel ladle weight M0 to be added, the initial carbon content C1 of the molten steel, and the target carbon content C2, the powdered recarburizer carbon requirement is calculated as: M=(C2-C1)×M0 / C0 Start the vibrating feeder, open valve a, and let the micro-powdered recarburizer enter the injection tank from the bin; make one end of the injection pipe inserted into the molten steel in the ladle to a depth of 100mm-1000mm; When the real-time material volume detected by the scanning imaging radar reaches the preset value When the real-time material volume detected by the scanning imaging radar reaches the preset value When the real-time material volume detected by the scanning imaging radar reaches the preset value When the real-time material volume detected by the scanning imaging radar reaches the preset value When the real-time material volume detected by the scanning imaging radar reaches the preset value When the real-time material volume detected by the scanning imaging radar reaches the When the controller receives the signal change from the signal of the level detector detecting the material level in the injection tank changing from having material to no material, the controller issues the closing instructions of valve b and valve c, and lifts the injection pipe out of the ladle.

6. The working method of the pulverized recarburizer adding device according to claim 5, characterized in that, The preset value of the real-time material volume quantity The calculation method is as follows: = -(C2-C1) x M0 / (C0 x ) wherein, represents the volume of material, represents the bulk density of the fine powdered recarburizer in the bin.

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