Furnace technology beneficial to eliminating carbon on steel wire mesh of small square blank tire bead of electric furnace

Abstract

The invention relates to the field of blank carbon elimination of steel wire rods for producing cord tire bead steel wires in iron and steel enterprises, in particular to a stokehole process beneficial to elimination of steel wire mesh carbon of a tire bead of a small square billet of an electric furnace. The heating process of the three-section heat accumulating type heating furnace of the high-speed wire rod steel rolling workshop is optimized, the traditional mode that the heating temperature of each section is increased step by step is broken through, the temperature of a blank is rapidly increased to 1100 DEG C, and therefore the high-temperature diffusion time is prolonged, the carbon element in the steel blank is fully diffused, and carbon segregation is fully eliminated; and the detection rate of high-grade net carbon in the finished wire rod is greatly reduced, and the use requirements of downstream users are met.

Description

Technical Field

[0001] The present invention relates to the field of decarburization of billets for producing bead wire rod in iron and steel enterprises, and specifically relates to a furnace operation process that is beneficial to eliminating network carbon in bead wire of electric furnace small square billets. Background Art

[0002] Due to the characteristics of fine wire diameter and complex structure in the subsequent processing of bead wire, the requirement for the grain boundary cementite grade of the product is higher than that of general steel grades; in order to meet the requirement of downstream tire wire product users for carbon reduction of wire rod, Shagang developed the LX82A product rolled from electric furnace small square billets; when it was put into production of 0.225mm HT structure, high wire breakage occurred, seriously affecting the cost-effectiveness of electric furnace small square billet cord steel; under the background that the current billet segregation level of electric furnace small square billets is objectively inferior to that of large square billets, the present application invented a new furnace operation process different from the traditional stepped heating; the new process greatly improved the grain boundary cementite level of the bead wire product of electric furnace small square billets by redesigning the gradient relationship of the temperatures of each section of the heating furnace.

[0003] In the current prior art, during the preheating and heating processes of the traditional furnace operation process, the furnace temperature is set relatively low, which will reduce the heating rate and diffusion efficiency of the steel billet, and is not conducive to the diffusion of carbon elements in the steel billet and the elimination of carbon segregation. There is high-level network carbon in the finished wire rod, seriously affecting the use of downstream users; the present application invented a new furnace operation process different from the traditional stepped heating, and increased the furnace temperature of the preheating section and the heating section by 100°C respectively on the basis of the traditional heating process. The furnace temperature of the heating section is basically close to the furnace temperature of the soaking section, thereby greatly extending the high-temperature diffusion time of the billet, being conducive to the full diffusion of carbon elements in the steel and the full elimination of carbon segregation, and the high-level network carbon in the finished wire rod significantly decreases. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A furnace operation process that is beneficial to eliminating network carbon in bead wire of electric furnace small square billets according to the present invention includes the following steps:

[0006] S1. Set the furnace temperature of the three-stage regenerative heating furnace;

[0007] S2. Charge the billets into the furnace for distribution;

[0008] S3. The three-stage regenerative heating furnace heats the billets according to the heating process;

[0009] S4. After the three-stage regenerative heating furnace finishes heating, roll the billets into wire rods and detect the metallographic structure.

[0010] Preferably, the three-stage heating method of the stoker is divided into a preheating section temperature, a heating section temperature, and a soaking section temperature:

[0011] The temperature range of the preheating section is between 930°C and 980°C, which is 100°C higher than the conventional process, and the residence time of the preheating section in the furnace is 33 minutes;

[0012] The temperature range of the heating section is between 1080°C and 1100°C, which is 100°C higher than the conventional process, and the residence time of the heating section in the furnace is 35 minutes;

[0013] The temperature range of the soaking section is between 1100°C and 1120°C, which remains unchanged compared with the conventional process, and the residence time of the soaking section in the furnace is 36 minutes.

[0014] Preferably, the three-stage regenerative heating furnace includes three-stage heaters and a stoker box fixedly installed on the outer surface of the output end of the three-stage heaters, a smoke exhaust electric control valve detachably installed on the outer surface of the top of the stoker box, a calorific value monitoring screen arranged on one side surface of the stoker box, a support frame movably lapped on the inner wall surface of the top of the stoker box, a small square brick wire ring detachably installed on the outer surface of the top of the support frame, and a foundation platform fixedly installed on the bottom surfaces of the three-stage heaters, the stoker box, and the calorific value monitoring screen.

[0015] Preferably, lateral sliding strips are fixedly connected to the inner wall surfaces on both sides of the stoker box, a limiting track strip is fixedly installed on the inner wall surface of the bottom of the stoker box, notches are formed on the two side surfaces of the stoker box and at the edge position of one side of the lateral sliding strips, a sealing extrusion strip is fixedly installed on the inner wall surface of the stoker box and at the edge position of one side of the notch, and a closing door is movably sleeved on the inner wall surface of the stoker box.

[0016] Preferably, fixing blocks are fixedly installed on the two side surfaces of the stoker box at the edge position of the notch entrance, hydraulic rods are fixedly installed on the outer surfaces of the fixing blocks, a swing extrusion plate that movably fits on the outer surface of the closing door is swingably sleeved on the inner wall surface of the notch, and the output end surface of the hydraulic rod movably laps on the outer surface of the swing extrusion plate.

[0017] Preferably, support limiting columns that movably lap on the outer surface of the top of the limiting track strip are fixedly connected to the bottom surface of the support frame, triangular clamping grooves that movably sleeve on the outer surface of the lateral sliding strips are formed on the two side surfaces of the support frame, a clamping groove is formed in the middle position on the top surface of the support frame, and a trapezoidal groove is formed in the middle position on the bottom surface of the clamping groove.

[0018] Preferably, a fixed beam movably sleeved on the inner side wall surface of the clamping groove is arranged on the top surface of the support frame. A trapezoidal docking bar movably sleeved on the inner side wall surface of the trapezoidal groove is arranged on the bottom surface of the fixed beam. A limit lock movably sleeved on the two side surfaces of the small square billet wire ring is fixedly connected to the top surface of the fixed beam. Hanging rings are fixedly connected to the top surface of the fixed beam and located at the two side edge positions.

[0019] Preferably, a heat insulation cover is fixedly connected to the top surface of the foundation platform and located at one side edge position of the stoker box. A gas booster tank is arranged inside the heat insulation cover on the top surface of the foundation platform. A gas guide pipe extending to the inner side wall surface of the stoker box is fixedly connected to the top surface of the gas booster tank.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. For the stoking process of the present invention which is beneficial to eliminating carbon in the wire mesh of the small square billet tire of the electric furnace, after the cold billet enters the preheating section, it is preheated at high temperature and quickly raised to the temperature of the heating section, and is kept at the same high temperature in the heating section and soaking section for a long time; in the three-section temperature, the preheating section is increased by 100 °C, the heating section is increased by 100 °C, and the soaking section remains unchanged; the detection rate of GBC≥C grade of the new process product is reduced from 7% to 0.5%. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 is the process flow schematic diagram in the present invention

[0024] Figure 2 is the three-section heater three-dimensional view of the present invention;

[0025] Figure 3 is the stoker box three-dimensional view of the present invention;

[0026] Figure 4 is the support frame sectional three-dimensional view of the present invention;

[0027] Figure 5 is the support frame unfolded three-dimensional view of the present invention;

[0028] Figure 6 is the stoker box sectional three-dimensional view of the present invention;

[0029] Figure 7 is the stoker box internal structure three-dimensional view of the present invention.

[0030] In the figure: 11, foundation platform; 111, three-stage heater; 112, heat insulation cover; 113, gas booster tank; 114, gas duct; 115, closing door; 12, stoker box; a1, fixed block; a2, hydraulic rod; a3, swing extrusion plate; 121, limit track bar; 122, lateral slide bar; 123, notch; 124, sealing extrusion bar; 13, exhaust gas electric control valve; 14, calorific value monitoring screen; 15, support frame; 151, support limit column; 152, triangular clamping groove; 153, clamping groove; 154, trapezoidal groove; 155, fixed beam; 156, trapezoidal docking bar; 157, hanging ring; 158, limit lock; 16, small square training steel wire ring. Detailed implementation mode

[0031] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with the specific implementation modes.

[0032] Embodiment 1

[0033] Such as Figures 1 to 7As shown in the figure, a furnace operation process of a furnaceman that is beneficial to eliminating carbon in the wire mesh of small billets in an electric furnace according to an embodiment of the present invention includes the following steps: S1. Set the furnace chamber temperature of a three-stage regenerative heating furnace; S2. Charge the billets into the furnace for distribution; S3. Heat the billets by the three-stage regenerative heating furnace according to the heating process; S4. After the three-stage regenerative heating furnace finishes heating, roll the billets into wire rods and detect the metallographic structure. The three-stage heating method of the furnaceman is divided into a preheating section temperature, a heating section temperature, and a soaking section temperature: The temperature range of the preheating section is between 930°C and 980°C, which is 100°C higher than the conventional process, and the residence time of the preheating section in the furnace is 33 minutes; The temperature range of the heating section is between 1080°C and 1100°C, which is 100°C higher than the conventional process, and the residence time of the heating section in the furnace is 35 minutes; The temperature range of the soaking section is between 1100°C and 1120°C, which remains unchanged compared with the conventional process, and the residence time of the soaking section in the furnace is 36 minutes. The three-stage regenerative heating furnace includes three-stage heaters 111 and a furnaceman box 12 fixedly installed on the outer surface of the output end of the three-stage heaters 111, a smoke exhaust electric regulating valve 13 detachably installed on the outer surface of the top of the furnaceman box 12, a calorific value monitoring screen 14 arranged on one surface of the furnaceman box 12, a support frame 15 movably lapped on the inner wall surface of the top of the furnaceman box 12, a small billet wire ring 16 detachably installed on the outer surface of the top of the support frame 15, a foundation platform 11 fixedly installed on the bottom surfaces of the three-stage heaters 111, the furnaceman box 12, and the calorific value monitoring screen 14. A heat insulation cover 112 is fixedly connected to the top surface of the foundation platform 11 and at the edge position on one side of the furnaceman box 12. A gas booster tank 113 is arranged inside the heat insulation cover 112 on the top surface of the foundation platform 11. A gas guide pipe 114 fixedly connected to the top surface of the gas booster tank 113 extends to the inner wall surface of the furnaceman box 12.

[0034] Before placing the small square billet wire coil 16, preheat the interior of the stoker box 12 in conjunction with the three-stage heater 111 so that the interior temperature of the stoker box 12 reaches 955 °C and lasts for 33 minutes. After the interior of the lateral slide bar 122 is preheated, move the small square billet wire coil 16 and the support frame 15 into the interior of the stoker box 12, and then attach the closing door 115 to the surface of the sealing extrusion strip 124 so that the interior of the stoker box 12 is in a closed state, greatly reducing the dissipation of the temperature inside the stoker box 12. Then, perform secondary heating on the interior of the stoker box 12 through the three-stage heater 111 to raise the interior of the stoker box 12 to 1100 °C and last for 35 min. Then, perform the third-stage homogenization treatment to raise the temperature inside the stoker box 12 to 1120 °C and last for 36 min. After that, turn off the three-stage heater 111 and use the residual heat to continuously heat the small square billet wire coil 16. The harmful gases generated during the heating process of the small square billet wire coil 16 are absorbed by the smoke exhaust electric control valve 13 and the harmful gases are discharged, achieving a slight increase in the temperature of the heating section, changing the temperature relationship between the three stages, reducing the temperature difference between the preheating section and the other two sections, and basically eliminating the temperature gradient between the heating section and the homogenization section; it can greatly eliminate the intergranular cementite of the electric furnace small square billet bead product and reduce the wire breakage rate.

[0035] As Figure 1 and Figure 4 shown, a support limit column 151 that is movably lapped on the outer surface of the top of the limit track bar 121 is fixedly connected to the bottom surface of the support frame 15. Triangular clamping grooves 152 that are movably sleeved on the outer surface of the lateral slide bar 122 are formed on both side surfaces of the support frame 15. A clamping groove 153 is formed in the middle of the top surface of the support frame 15. A trapezoidal groove 154 is formed in the middle of the bottom surface of the clamping groove 153. A fixed beam 155 that is movably sleeved on the inner wall surface of the clamping groove 153 is provided on the top surface of the support frame 15. A trapezoidal docking strip 156 that is movably sleeved on the inner wall surface of the trapezoidal groove 154 is provided on the bottom surface of the fixed beam 155. A limit lock 158 that is movably sleeved on both side surfaces of the small square billet wire coil 16 is fixedly connected to the top surface of the fixed beam 155. Hanging rings 157 are fixedly connected to both side edge positions of the top surface of the fixed beam 155.

[0036] Lap the small square baking ring 16 on the top surface of the fixed beam 155. At this time, cooperate with the limit lock 158 to limit the positions of the two side surfaces of the small square baking ring 16, so that the small square baking ring 16 is firmly positioned on the top surface of the fixed beam 155. Then, use a crane to place the fixed beam 155 flat on the top surface of the support frame 15. At this time, cooperate with the fixed beam 155 and the trapezoidal docking strip 156 to dock on the inner side wall surfaces of the clamping groove 153 and the trapezoidal groove 154, and push the support frame 15, so that the triangular clamping groove 152 and the support limit column 151 slide on the outer side surfaces of the lateral slide bar 122 and the limit track bar 121 respectively, achieving the effect of using the limit track bar 121 and the lateral slide bar 122 to limit the position of the support frame 15, so that the support frame 15 can horizontally move deep into the inner part of the stoker box 12.

[0037] As Figures 1 to 6 shown, on the two inner side wall surfaces of the stoker box 12, there are fixed-connected lateral slide bars 122, and a limit track bar 121 is fixedly installed on the inner bottom side wall surface of the stoker box 12. On the two side surfaces of the stoker box 12 and at one side edge position of the lateral slide bar 122, there are notches 123 opened. On the inner side wall surface of the stoker box 12 and at one side edge position of the notch 123, there is a sealing extrusion strip 124 fixedly installed. A closing door 115 is movably sleeved on the inner side wall surface of the stoker box 12. On the two side surfaces of the stoker box 12, there are fixed blocks a1 installed at the edge position of the entrance of the notch 123. On the outer side surface of the fixed block a1, there is a hydraulic rod a2 fixedly installed. On the inner side wall surface of the notch 123, there is a swing extrusion plate a3 swing-sleeved and actively attached to the outer side surface of the closing door 115. The output end surface of the hydraulic rod a2 is actively lapped on the outer side surface of the swing extrusion plate a3; when the closing door 115 fits at the entrance of the stoker box 12, cooperate with the hydraulic rod a2 to push the swing extrusion plate a3 inside the notch 123, so that the swing extrusion plate a3 swings inside the notch 123, and then the surface of the swing extrusion plate a3 fits on the outer side surface of the closing door 115, so that the closing door 115 is closely attached and extruded with the surface of the sealing extrusion strip 124, increasing the sealing effect inside the stoker box 12.

[0038] Embodiment 2

[0039] As Figures 1 to 7As shown in the figure, a furnace operation process of the present invention embodiment for a billet of electric furnace small square billet that is beneficial to eliminating the carbon of the wire mesh of the bead, includes the following steps: S1, setting the furnace temperature of the three-section regenerative heating furnace; S2, charging and distributing the billets into the furnace; S3, heating the billets by the three-section regenerative heating furnace according to the heating process; S4, after the three-section regenerative heating furnace finishes heating, rolling the billets into wire rods and detecting the metallographic structure; The three-section heating method of the furnace operation is divided into the preheating section temperature, the heating section temperature, and the soaking section temperature: The temperature range of the preheating section is located at 930°C to 980°C, which is 100°C higher than the conventional process, and the residence time of the preheating section in the furnace is 33 minutes; The temperature range of the heating section is located at 1080°C to 1100°C, which is 100°C higher than the conventional process, and the residence time of the heating section in the furnace is 35 minutes; The temperature range of the soaking section is located at 1100°C to 1120°C, which remains unchanged compared with the conventional process, and the residence time of the soaking section in the furnace is 36 minutes; The three-section regenerative heating furnace includes three-section heaters 111 and a furnace operation box 12 fixedly installed on the outer surface of the output end of the three-section heaters 111, a smoke exhaust electric control valve 13 detachably installed on the outer surface of the top of the furnace operation box 12, a calorific value monitoring screen 14 arranged on one surface of the furnace operation box 12, a support frame 15 movably lapped on the inner wall surface of the top of the furnace operation box 12, a small square billet wire ring 16 detachably installed on the outer surface of the top of the support frame 15, a foundation platform 11 fixedly installed on the bottom surfaces of the three-section heaters 111, the furnace operation box 12, and the calorific value monitoring screen 14, a heat insulation cover 112 fixedly connected to the top surface of the foundation platform 11 and located at one edge position of the furnace operation box 12, a gas booster tank 113 arranged inside the heat insulation cover 112 on the top surface of the foundation platform 11, and a gas guide pipe 114 fixedly connected to the top surface of the gas booster tank 113 and extending to the inner wall surface of the furnace operation box 12.

[0040] Before placing the small square billet wire coil 16, preheat the interior of the stoker box 12 in cooperation with the three-stage heater 111 so that the interior temperature of the stoker box 12 reaches 955 °C and lasts for 33 minutes. After the interior of the lateral slide bar 122 is preheated, move the small square billet wire coil 16 and the support frame 15 into the interior of the stoker box 12, and then make the closing door 115 fit on the surface of the sealing extrusion strip 124 so that the interior of the stoker box 12 is in a closed state, greatly reducing the dissipation of the temperature inside the stoker box 12. Then, perform secondary heating on the interior of the stoker box 12 through the three-stage heater 111 to raise the interior of the stoker box 12 to 1100 °C and last for 35 min. Furthermore, perform the third-stage homogenization treatment to raise the temperature inside the stoker box 12 to 1120 °C and last for 36 min. Then, turn off the three-stage heater 111 and use the waste heat to continuously heat the small square billet wire coil 16. The harmful gases generated during the heating process of the small square billet wire coil 16 are absorbed by the smoke exhaust electric control valve 13 and the harmful gases are discharged, achieving the effect of slightly increasing the temperature of the heating section, changing the temperature relationship between the three stages, reducing the temperature difference between the preheating section and the other two sections, and basically eliminating the temperature gradient between the heating section and the homogenization section; it can greatly eliminate the grain boundary cementite of the electric furnace small square billet bead product and reduce the wire breakage rate.

[0041] As Figures 1 to 4 shown, a support limit post 151 is fixedly connected to the bottom surface of the support frame 15 and movably lapped on the outer surface of the top of the limit track bar 121. Triangular clamping grooves 152 are formed on both side surfaces of the support frame 15 and movably sleeved on the outer surface of the lateral slide bar 122. A clamping groove 153 is formed on the top surface of the support frame 15 and located at the middle position. A trapezoidal groove 154 is formed on the bottom surface of the clamping groove 153 and located at the middle position. A fixed beam 155 is arranged on the top surface of the support frame 15 and movably sleeved on the inner wall surface of the clamping groove 153. A trapezoidal docking bar 156 is arranged on the bottom surface of the fixed beam 155 and movably sleeved on the inner wall surface of the trapezoidal groove 154. A limit lock 158 is fixedly connected to the top surface of the fixed beam 155 and movably sleeved on both side surfaces of the small square billet wire coil 16. Hanging rings 157 are fixedly connected to both side edge positions on the top surface of the fixed beam 155.

[0042] Lap the small square ingot wire coil 16 on the top surface of the fixed beam 155. At this time, cooperate with the limit locking buckle 158 to limit the positions of the two side surfaces of the small square ingot wire coil 16, so that the small square ingot wire coil 16 is firmly positioned on the top surface of the fixed beam 155. Then, use a crane to place the fixed beam 155 flat on the top surface of the support frame 15. At this time, cooperate with the fixed beam 155 and the trapezoidal docking strip 156 to dock on the inner side wall surfaces of the clamping groove 153 and the trapezoidal groove 154, and push the support frame 15, so that the triangular clamping groove 152 and the support limit column 151 slide on the outer side surfaces of the lateral sliding strip 122 and the limit track strip 121 respectively, achieving the effect of using the limit track strip 121 and the lateral sliding strip 122 to limit the position of the support frame 15, so that the support frame 15 can horizontally move deep into the inner part of the stoker box 12.

[0043] As Figures 1 to 6 shown, on the two inner side wall surfaces of the stoker box 12, there are fixedly connected lateral sliding strips 122, and a limit track strip 121 is fixedly installed on the inner bottom side wall surface of the stoker box 12. On the two side surfaces of the stoker box 12 and at one side edge position of the lateral sliding strip 122, there are openings 123. On the inner side wall surface of the stoker box 12 and at one side edge position of the opening 123, there is fixedly installed a sealing extrusion strip 124. A closing door 115 is movably sleeved on the inner side wall surface of the stoker box 12. On the two side surfaces of the stoker box 12, there are fixedly installed fixing blocks a1 at the edge position of the entrance of the opening 123. On the outer side surface of the fixing block a1, there is fixedly installed a hydraulic rod a2. A swinging extrusion plate a3 that is swingingly sleeved on the inner side wall surface of the opening 123 and is movably attached to the outer side surface of the closing door 115. The output end surface of the hydraulic rod a2 is movably lapped on the outer side surface of the swinging extrusion plate a3; when the closing door 115 fits at the entrance of the stoker box 12, cooperate with the hydraulic rod a2 to push the swinging extrusion plate a3 inside the opening 123, so that the swinging extrusion plate a3 swings inside the opening 123, and then the surface of the swinging extrusion plate a3 fits on the outer side surface of the closing door 115, so that the closing door 115 is tightly fitted and extruded with the surface of the sealing extrusion strip 124, increasing the sealing effect inside the stoker box 12.

[0044] Example 3

[0045] As Figures 1 to 7As shown in the figure, a furnace operation process of the present invention embodiment for an electric furnace small billet bead wire mesh carbon elimination, comprising the following steps: S1, setting the furnace temperature of a three-stage regenerative heating furnace; S2, charging and distributing the billets into the furnace; S3, heating the billets by the three-stage regenerative heating furnace according to the heating process; S4, after the three-stage regenerative heating furnace completes heating, rolling the billets into wire rods and detecting the metallographic structure; the three-stage heating mode of the furnace operation is divided into the preheating section temperature, the heating section temperature and the soaking section temperature: the preheating section temperature range is from 930°C to 980°C, 100°C higher than the conventional process, and the residence time of the preheating section in the furnace: 33 min; the heating section temperature range is from 1080°C to 1100°C, 100°C higher than the conventional process, and the residence time of the heating section in the furnace: 35 min; the soaking section temperature range is from 1100°C to 1120°C, remaining unchanged compared with the conventional process, and the residence time of the soaking section in the furnace: 36 min; the three-stage regenerative heating furnace includes three-stage heaters 111 and a furnace operation box 12 fixedly installed on the outer surface of the output end of the three-stage heaters 111, a smoke exhaust electric control valve 13 detachably installed on the outer surface of the top of the furnace operation box 12, a calorific value monitoring screen 14 arranged on one side surface of the furnace operation box 12, a support frame 15 movably lapped on the inner wall surface of the top of the furnace operation box 12, a small billet wire ring 16 detachably installed on the outer surface of the top of the support frame 15, a foundation platform 11 fixedly installed on the bottom surfaces of the three-stage heaters 111, the furnace operation box 12 and the calorific value monitoring screen 14, a heat insulation cover 112 fixedly connected to the top surface of the foundation platform 11 and at the edge position on one side of the furnace operation box 12, a gas booster tank 113 arranged inside the heat insulation cover 112 on the top surface of the foundation platform 11, and a gas guide pipe 114 fixedly connected to the top surface of the gas booster tank 113 and extending to the inner wall surface of the furnace operation box 12.

[0046] Before putting the small square billet wire coil 16, preheat the inside of the stoker box 12 in cooperation with the three-stage heater 111 so that the internal temperature of the stoker box 12 reaches 955 °C and lasts for 33 minutes. After the inside of the lateral slide bar 122 is preheated, move the small square billet wire coil 16 and the support frame 15 into the inside of the stoker box 12, and then make the closing door 115 fit on the surface of the sealing extrusion strip 124 so that the inside of the stoker box 12 is in a closed state, greatly reducing the dissipation of the internal temperature of the stoker box 12. Then, perform secondary heating on the inside of the stoker box 12 through the three-stage heater 111 to raise the inside of the stoker box 12 to 1100 °C and last for 35 min. Then, perform the third-stage homogenization treatment to raise the temperature inside the stoker box 12 to 1120 °C and last for 36 min. Then, turn off the three-stage heater 111 and use the waste heat to continuously heat the small square billet wire coil 16. The harmful gases generated during the heating process of the small square billet wire coil 16 are absorbed by the exhaust gas electric control valve 13 and the harmful gases are discharged, achieving the effect of slightly increasing the temperature of the heating section, changing the temperature relationship between the three stages, reducing the temperature difference between the preheating section and the other two sections, and basically eliminating the temperature gradient between the heating section and the homogenization section; being able to greatly eliminate the grain boundary cementite of the electric furnace small square billet bead product and reduce the wire breakage rate;

[0047] After the cold billet enters the preheating section, the temperature of the core part rises rapidly and is kept at the same high temperature in the heating and homogenization stages for a long time; in the three-stage temperature, the preheating section is increased by 75 °C, the heating section is increased by 20 °C, and the homogenization section remains unchanged; the detection rate of GBC≥C grade of the new process product is reduced from 7% to 0.5%. The heating furnace is equipped with a gas pressure stabilizing and boosting device, and the gas pressure is required to be ≥5 kPa and kept stable.

[0048] As Figures 1 to 4 shown, a support limit column 151 that is movably lapped on the outer surface of the top of the limit track bar 121 is fixedly connected to the bottom surface of the support frame 15. Triangular clamping grooves 152 that are movably sleeved on the outer surface of the lateral slide bar 122 are formed on both side surfaces of the support frame 15. A clamping groove 153 is formed on the top surface of the support frame 15 and in the middle position. A trapezoidal groove 154 is formed on the bottom surface of the clamping groove 153 and in the middle position. A fixed beam 155 that is movably sleeved on the inner wall surface of the clamping groove 153 is arranged on the top surface of the support frame 15. A trapezoidal docking bar 156 that is movably sleeved on the inner wall surface of the trapezoidal groove 154 is arranged on the bottom surface of the fixed beam 155. A limit lock 158 that is movably sleeved on both side surfaces of the small square billet wire coil 16 is fixedly connected to the top surface of the fixed beam 155. Hanging rings 157 are fixedly connected to the top surface of the fixed beam 155 and at both side edge positions.

[0049] Lap the small square baking ring 16 on the top surface of the fixed beam 155. At this time, cooperate with the limit lock 158 to limit the positions of the two side surfaces of the small square baking ring 16, so that the small square baking ring 16 is firmly positioned on the top surface of the fixed beam 155. Then, use a crane to place the fixed beam 155 flat on the top surface of the support frame 15. At this time, cooperate with the fixed beam 155 and the trapezoidal docking strip 156 to dock on the inner side wall surfaces of the clamping groove 153 and the trapezoidal groove 154, and push the support frame 15, so that the triangular clamping groove 152 and the support limit column 151 slide on the outer side surfaces of the lateral slide bar 122 and the limit track bar 121 respectively, achieving the effect of using the limit track bar 121 and the lateral slide bar 122 to limit the position of the support frame 15, so that the support frame 15 can horizontally move deep into the inner part of the stoker box 12.

[0050] As Figures 1 to 6 shown, the lateral slide bars 122 are fixedly connected to the inner side wall surfaces on both sides of the stoker box 12, the limit track bar 121 is fixedly installed on the inner side wall surface at the bottom of the stoker box 12. The notch 123 is opened on the two side surfaces of the stoker box 12 and at the side edge position of the lateral slide bar 122. The sealing extrusion strip 124 is fixedly installed on the inner side wall surface of the stoker box 12 and at the side edge position of the notch 123. The closing door 115 is movably sleeved on the inner side wall surface of the stoker box 12. The fixed block a1 is fixedly installed on the two side surfaces of the stoker box 12 and at the edge position at the entrance of the notch 123. The hydraulic rod a2 is fixedly installed on the outer side surface of the fixed block a1. The swing extrusion plate a3 that is movably attached to the outer side surface of the closing door 115 is swingably sleeved on the inner side wall surface of the notch 123. The output end surface of the hydraulic rod a2 is movably lapped on the outer side surface of the swing extrusion plate a3.

[0051] When the closing door 115 fits at the entrance of the stoker box 12, cooperate with the hydraulic rod a2 to push the swing extrusion plate a3 inside the notch 123, so that the swing extrusion plate a3 swings inside the notch 123, and then the surface of the swing extrusion plate a3 fits on the outer side surface of the closing door 115, so that the closing door 115 is closely attached and extruded with the surface of the sealing extrusion strip 124, increasing the sealing effect inside the stoker box 12.

[0052] Working principle: The small square billet wire coil 16 is lapped on the top surface of the fixed beam 155. At this time, the position of both side surfaces of the small square billet wire coil 16 is limited by the limiting lock catch 158, so that the small square billet wire coil 16 is firmly positioned on the top surface of the fixed beam 155. Then, the fixed beam 155 is placed flat on the top surface of the support frame 15 by a hoist. Fixed beams 155 are added at both ends of the heating section to prevent the billet from bending in the billet furnace under the new process. At this time, in cooperation with the fixed beam 155 and the trapezoidal docking strip 156, they are docked on the inner side wall surfaces of the clamping groove 153 and the trapezoidal groove 154 to push the support frame 15, so that the triangular clamping groove 152 and the support limiting column 151 slide on the outer surface of the lateral slide bar 122 and the limiting track bar 121 respectively, achieving the effect of limiting the position of the support frame 15 by the limiting track bar 121 and the lateral slide bar 122, so that the support frame 15 can horizontally move deep into the inner part of the stoker box 12;

[0053] Before putting the small square billet wire coil 16, the inside of the stoker box 12 is preheated by the three-section heater 111, so that the internal temperature of the stoker box 12 reaches 955 °C and lasts for 33 minutes. After the inside of the lateral slide bar 122 is preheated, the small square billet wire coil 16 and the support frame 15 are moved into the inside of the stoker box 12. Then, the closing door 115 is attached to the surface of the sealing extrusion strip 124, so that the inside of the stoker box 12 is in a closed state, greatly reducing the dissipation of the internal temperature of the stoker box 12. Then, the inside of the stoker box 12 is heated in the second stage by the three-section heater 111, so that the internal temperature of the stoker box 12 is raised to 1100 °C and lasts for 35 min. Then, in the third stage of homogenization treatment, the internal temperature of the stoker box 12 is raised to 1120 °C and lasts for 36 min. Then, the three-section heater 111 is turned off, and the waste heat is used to continuously heat the small square billet wire coil 16. The harmful gases generated during the heating process of the small square billet wire coil 16 are absorbed by the smoke exhaust electric control valve 13 and the harmful gases are discharged, achieving the effect of slightly increasing the temperature of the heating section, changing the temperature relationship among the three sections, reducing the temperature difference between the preheating section and the other two sections, and basically eliminating the temperature gradient between the heating section and the homogenization section; and being able to largely eliminate the grain boundary cementite of the electric furnace small square billet bead product and reduce the wire breakage rate.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A stoker process that is conducive to eliminating carbon in the wire mesh of the bead of small square billets in an electric furnace, characterized in that: It includes the following steps: S1. Set the furnace temperature of the three-stage regenerative heating furnace. S2. Charge the billets into the furnace for distribution. S3. The three-stage regenerative heating furnace heats the billets according to the heating process. S4. After the three-stage regenerative heating furnace finishes heating, roll the billets into wire rods and detect the metallographic structure.

2. The stoker process according to claim 1, which is beneficial to eliminating the carbon of the wire mesh of the small square billet in the electric furnace, is characterized in that: The three-stage heating method of the furnace operator is divided into the preheating section temperature, the heating section temperature, and the soaking section temperature: The temperature range of the preheating section is from 930°C to 980°C, which is 100°C higher than the conventional process, and the residence time of the preheating section in the furnace is 33 minutes. The temperature range of the heating section is from 1080°C to 1100°C, which is 100°C higher than the conventional process, and the residence time of the heating section in the furnace is 35 minutes. The temperature range of the soaking section is from 1100°C to 1120°C, which remains unchanged compared with the conventional process, and the residence time of the soaking section in the furnace is 36 minutes.

3. A stoker process for eliminating carbon in the wire mesh of the bead of small billets in an electric furnace, as claimed in claim 2, characterized in that: The three-stage regenerative heating furnace includes three-stage heaters (111), a furnace operator box (12) fixedly installed on the outer surface of the output end of the three-stage heaters (111), a smoke exhaust electric control valve (13) detachably installed on the outer surface of the top of the furnace operator box (12), a calorific value monitoring screen (14) arranged on one side surface of the furnace operator box (12), a support frame (15) movably lapped on the inner wall surface of the top of the furnace operator box (12), a small square brick wire ring (16) detachably installed on the outer surface of the top of the support frame (15), and a foundation platform (11) fixedly installed on the bottom surfaces of the three-stage heaters (111), the furnace operator box (12), and the calorific value monitoring screen (14).

4. A stoker process for eliminating carbon in the wire mesh of the bead of small billets in an electric furnace, according to claim 3, characterized in that: On the inner wall surfaces of both sides of the furnace operator box (12), there are laterally sliding strips ( 5. A stoker process for facilitating the elimination of carbon in the wire mesh of the bead of small billets in an electric furnace according to claim 3, characterized in that: ​ 6. A stoker process for eliminating carbon in the wire mesh of the bead of small billets in an electric furnace according to claim 3, characterized in that: A support limit column (151) which is fixedly connected to the bottom surface of the support frame (15) and movably lapped on the outer surface of the top of the limit track bar (121), triangular clamping grooves (152) which are formed in both side surfaces of the support frame (15) and movably sleeved on the outer surface of the lateral sliding bar (122), a clamping groove (153) which is formed in the middle of the top surface of the support frame (15), and a trapezoidal groove (154) which is formed in the middle of the bottom surface of the clamping groove (153).

7. A stoker process for facilitating the elimination of carbon from the wire mesh of the bead of small billets in an electric furnace according to claim 6, characterized in that: A fixed beam (155) which is movably sleeved on the inner wall surface of the clamping groove (153) is arranged on the top surface of the support frame (15), a trapezoidal docking bar (156) which is movably sleeved on the inner wall surface of the trapezoidal groove (154) is arranged on the bottom surface of the fixed beam (155), a limit lock (158) which is movably sleeved on both side surfaces of the small square training wire ring (16) is fixedly connected to the top surface of the fixed beam (155), and hanging rings (157) are fixedly connected to both side edge positions of the top surface of the fixed beam (155).

8. A stoker process for eliminating carbon in the wire mesh of the billet of an electric furnace, which is beneficial according to claim 3, characterized in that: A heat insulation cover (112) is fixedly connected to the top surface of the foundation platform (11) and on one side edge position of the stoker box (12), a gas booster tank (113) is arranged inside the heat insulation cover (112) on the top surface of the foundation platform (11), and a gas guide pipe (114) which extends to the inner wall surface of the stoker box (12) is fixedly connected to the top surface of the gas booster tank (113).

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