CN112813255B

CN112813255B - Method for shaping sintered material surface and system for shaping sintered material surface

Info

Publication number: CN112813255B
Application number: CN202110014990.4A
Authority: CN
Inventors: 周浩宇; 刘前; 叶恒棣
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2023-04-28
Anticipated expiration: 2041-01-06
Also published as: CN112813255A

Abstract

The invention discloses a method for shaping a sintering material surface and a system for shaping the sintering material surface, wherein the system for shaping the sintering material surface is adopted to carry out sintering after grooves are formed in the sintering material surface, and meanwhile, the quantity, depth and width of the grooves are accurately controlled and regulated according to the requirements of actual working conditions, so that the problem that transverse and longitudinal cracks are generated on the sintering material surface in the sintering process, and the quality of sintered ore products is affected is solved.

Description

Method for shaping sintered material surface and system for shaping sintered material surface

Technical Field

The invention relates to a sintering treatment process of a sintering material, in particular to a method for shaping the surface of the sintering material and a system for shaping the surface of the sintering material, and belongs to the technical field of sintering treatment.

Background

The sintering process is one key link in iron making process, and is characterized by that various powdered iron-containing raw materials are mixed with proper quantity of fuel and flux, and added with proper quantity of water, and after mixing and pelletizing, the materials are undergone the processes of a series of physical-chemical change on sintering equipment, and sintered into blocks, so that they are fed into blast furnace to implement next process. Sintering is a main raw material processing technology for steel smelting in China, and more than 75% of blast furnace raw materials are derived from sinter.

The starting point of the sintering process is a material distribution, which is to arrange a sinter mixture containing sintering raw materials such as iron ore, coke, and quicklime from a silo onto a sintering machine trolley to form a sinter raw material layer with a certain thickness. The shaping of the sintering material surface refers to controlling the material distribution process to form a specific shape on the surface of the formed sintering material layer so as to achieve the effects of improving the air permeability of the sintering material layer and promoting the sintering process. The quality of the shaping quality of the material surface has a considerable influence on the quality of the finished mineral products when the subsequent sintering process is carried out normally. In the prior art of shaping the sintered material surface, the sintered material surface is shaped into a simple horizontal surface shape, and the material surface shaping method is favorable for uniform distribution of air flow at all parts of the material surface, but has large material surface tension, and can easily form transverse or longitudinal cracks on the material surface due to shrinkage of the sintered ore volume in the cooling process of the sintered ore, thereby influencing the quality of the sintered ore product.

Fig. 2 is a schematic diagram of a conventional sintering machine. The sintering machine head is provided with a device 01 material distribution device, and a device 02 ignition furnace is arranged at the rear part of the material distribution device. The sintering machine trolley of the plurality of devices 03 is arranged on the sintering machine in an end-to-end mode, wheels of the sintering machine trolley are arranged on the sintering machine track of the devices 06, and the trolley runs along the sintering machine track. The bottom bellows of the device 04 is arranged below the track, the upper part of the bellows is just at the bottom of the trolley, and the lower part of the bellows is connected with a large sintering flue 05. Before sintering starts, the mixture of iron ore, coke, dolomite and the like is filled into the sintering trolley from the front part of the sintering machine. When the trolley filled with sintering materials passes below the ignition furnace cover, the ignition burner ignites coke and the like on the surface of the sintering materials, a thin combustion belt is formed on the surface of the material layer, and the trolley continuously moves towards the tail part of the sintering machine along the track. And a certain negative pressure (generally about 14 kPa) is maintained in the sintering large flue, so that the trolley at the upper part of the sintering machine is in an air suction state, and air above the material layer is pumped into the sintering material layer. Under the action of the air draft, the material at the lower part of the material layer is gradually ignited by the upper combustion belt, and the combustion belt at the surface layer finally moves to the bottom of the trolley to finish sintering of the material. And discharging the sintered finished ore from the tail part of the sintering machine, and pumping the waste gas formed in the sintering process from a large flue at the bottom. FIG. 3 shows a conventional method for shaping a sintered charge level, wherein after the completion of the distribution of the sintered mixture, a flat charge level with a horizontal plane (FIG. 3-a) or a flat charge level with inclined waists on both sides (FIG. 3-b) is formed (super trolley breast board distribution).

Aiming at the problems of large material surface tension and easy generation of transverse and longitudinal cracks in the prior sintering technology, the invention provides a novel material surface shaping process and a control method thereof, so as to solve the problems that the transverse and longitudinal cracks are generated on the sintered material surface in the sintering process and the quality of sintered mineral products is influenced.

Disclosure of Invention

Aiming at the problems of large material surface tension and easy generation of transverse and longitudinal cracks in the prior sintering technology, the method for shaping the sintering material surface and the system thereof are used for sintering the sintering material surface after forming grooves, and simultaneously, the forming number, the forming depth, the opening width and the like of the grooves are precisely controlled according to the actual working condition requirement so as to solve the problems that the sintering material surface generates transverse and longitudinal cracks and the quality of sintered mineral products is influenced in the sintering process.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

according to a first embodiment of the present invention, a method of sinter charge shaping is provided.

A method of sinter charge level shaping, the method comprising the steps of:

1) The sinter mix is first loaded into the sinter trolley from the front of the sinter machine.

2) Then, grooves are formed on the sintering material surface in the sintering trolley, so that the sintering material surface becomes a mixed structure material surface formed by combining the flat material surface and the grooves.

3) And then the ignition furnace is used for igniting and sintering the sintering mixture with the material surface with the mixed structure to obtain the sintering ore.

Preferably, in step 2), the cross section of the groove is one or more of V-shape, semicircle and rectangle.

Preferably, the grooves are formed in the surface of the sintered material.

Preferably, the arrangement manner of the plurality of grooves is as follows: and the grooves are distributed equidistantly or distributed gradually or densely towards two sides by taking the midpoint of the sintering material surface as an origin in the width direction of the sintering material surface. The grooves are of a linear and/or curved design in the length direction of the sinter level.

Preferably, in step 2), the trench opening includes the steps of:

201 Determining the number of grooves, the depth of the grooves and the width of the grooves according to the actual working conditions.

202 In the vertical direction perpendicular to the sintering material surface, the opening depth of the groove is adjusted.

203 In the width direction of the sintered material surface, the opening number of the grooves is further adjusted by adjusting the distance between the central axes of the adjacent grooves.

204 In the width direction of the sinter level, the opening width of the groove is adjusted.

Preferably, in step 201), first, the width of the single-section plane is determined according to the width of the sinter level, the allowable stress of the sinter and the temperature difference between before and after the sinter is cooled, and then the number of grooves to be opened and the distance between the central axes of the adjacent grooves are determined according to the width of the single-section plane. Secondly, determining the opening depth of the grooves according to ignition temperature of the ignition furnace, width of the sintering material surface and the opening quantity of the grooves. And finally, determining the opening width of the groove according to the length of the groove edge of the groove opening tool and the opening depth of the groove.

Preferably, the opening quantity of the regulating grooves, the opening depth of the regulating grooves and the opening width of the regulating grooves are all regulated by adopting a material surface shaping device. The material surface shaping device comprises a fixed support, a semicircular base, a connecting ball, a pull rod and a groove blade. One end of the semicircular base is fixed on the fixed support. The other end of the semicircular base is connected with one end of the pull rod through a connecting ball. The other end of the pull rod is provided with the groove edge.

Generally, the semicircular base, the connecting ball and the pull rod are all provided with a plurality of connecting balls, and the number of the connecting balls is consistent with that of the connecting balls.

Preferably, the allowable stress of the sinter is set to be δ, kPa. The width of the sintering material surface is M and M. The temperature difference before and after the cooling of the sinter is delta T and DEG C. The width V of the single-section flat material surface after the grooves are formed on the sintering material surface is as follows:

v=δ/(k1·Δt), (formula I).

In the formula I, V is the width of a single-section flat material surface after a groove is formed on the sintering material surface, and m. k1 is an empirical coefficient of the surface stress of the sinter, obtained from field tests, and has a value of 3.5 to 5.5 kPa/mC, preferably 4.0 to 5.5 kPa/mC, for example 4.2 kPa/mC.

Then, the number n of grooves is:

n= { M/V } -1..(formula II).

In the formula I, "{ }" is an upward rounding symbol, and represents that the value is the smallest integer which is greater than or equal to the target value.

Further, the distance x between the central axes of adjacent grooves is:

x=m/(n+1), (formula III).

In the formula III, x is the interval between the central axes of adjacent grooves, and m.

Preferably, the setpoint furnace ignition temperature is T1, DEG C. The opening depth d of the groove is:

d= (k2·t1·m)/n. (formula IV).

In the formula IV, d is the opening depth of the groove, and m. k2 is an empirical coefficient of the trench depth, and is obtained by field test and has a value of 1.1X10 ^-5 ～3.0×10 ^-5 Preferably 1.5X10. Degree.C ^-5 ～2.5×10 ^-5 Per DEG C, e.g. 2.38X10 ^-5 and/C. M is the width of the sintered material surface and M. n is the number of grooves.

Preferably, the trench opening width b is:

in the formula (V), b is the opening width of the groove, and m. d is the opening depth of the groove, m and C is the length of the groove edge, m.

Preferably, step 202) specifically comprises: and (3) adjusting the rotation angles of the pull rod in the plane where the axis of the sintered material surface in the length direction of the material surface in the material surface shaping device is positioned to be theta so that the opening depth of the groove is d, and then:

in the formula VI, d is the opening depth of the groove and m. H is the vertical height of the sphere center of the connecting sphere from the sintering material surface, and m. L is the length of the pull rod, m.

Preferably, step 204) specifically includes: adjusting the self-rotation angle alpha of the groove blade in the material surface shaping device by taking the central axis of the pull rod as a rotation axis to enable the opening width of the groove to be b, and then:

α=arcsin (b/C.) (formula VII).

In formula VII, alpha is the self-rotation angle of the groove blade with the central axis of the pull rod as the rotation axis. b is the opening width of the trench, m. C is the length of the slot edge, m.

Preferably, step 203) specifically includes: all the pull rods are sequentially arranged in the width direction of the sintering material surfaceThe number is 1,2, i, n. Sequentially calculating the rotation angle beta of the pull rod in the plane of the axis of the sintered material surface in the width direction according to the following mode _i Setting beta ₁ The constant value is 0 DEG, i is more than or equal to 1 and less than n. Then:

20301 When beta is _i+1 When the ratio of x to (Z-L.sin theta.sin beta) is less than or equal to 90 DEG _i +L·sinθ·sinβ _i+1 ). The following steps are performed: the rotation angle of the (i+1) th pull rod in the plane of the axis of the sintered material surface in the width direction of the sintered material surface in the material surface shaping device is regulated to be beta according to the formula (VIII) _i+1 So that the spacing between the two tie rods numbered i and (i+1) (i.e., the spacing between the central axes of two adjacent grooves) is x:

in (formula VIII), beta _i+1 The rotation angle of the (i+1) th pull rod in the plane of the axis of the sintering material surface in the width direction is DEG. x is the distance between the central axes of adjacent grooves, and m. Z is the distance between the centers of two adjacent connecting balls, and m. L is the length of the pull rod, m. θ is the rotation angle of the pull rod in the plane of the axis of the length direction of the sintering material surface.

20302 When beta is _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) The length of the pull rod is gradually increased to be L' = (L+L) _s ). Then substituting L' into (formula VI) to recalculate to obtain new value of theta, continuing to perform step 20302), and performing iterative calculation until x is less than or equal to (Z-L.sin theta.sin beta) _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed). Wherein L is _s The value of the length of the pull rod added for each step is 1-100mm, preferably 5-80mm.

Alternatively, when beta _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) And (3) the current (i+1) th pull rod is withdrawn from the groove pulling operation. And then taking the (i+2) th pull rod as the next calculation target of the i th pull rod for calculation. Namely, when the original (i+1) th pull rod is withdrawn from the pull rodAfter the ditch operation, the original (i+2) th pull rod is used as a new (i+1) th pull rod, and then the step 20302 is continued, and iterative calculation is carried out according to the result until x is less than or equal to (Z-L.sin theta.sin beta) _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed).

According to a second embodiment of the invention, a sinter level shaping system or a sinter level shaping system for use in the method of the first embodiment is provided.

A sintered charge level shaping system comprises a charge level shaping device, a sintering trolley and an ignition furnace. The material surface shaping device is arranged at the front end of the ignition furnace and is positioned above the sintering trolley.

Preferably, the material surface shaping device comprises a fixed support, a semicircular base, a connecting ball and a pull rod. One end of the fixed support is fixed on the side wall of the front end of the ignition furnace. One end of the semicircular base is fixedly connected to the other end of the fixed support. The other end of the semicircular base is connected with the top end of the pull rod through a connecting ball. The pull rod rotates in the semicircular base through the connecting ball.

Preferably, the rotation of the tie rod in the semicircular base through the connecting ball includes a rotation of the tie rod in a plane in which an axis of the connecting ball in a length direction of an upper surface of the sintering pallet is located with the connecting ball as an origin, a rotation of the tie rod in a plane in which an axis of the connecting ball in a width direction of an upper surface of the sintering pallet is located with the connecting ball as an origin, and a self rotation of the tie rod with the central axis of the tie rod in the length direction as a rotation axis.

Preferably, the system further comprises a fluted edge. The groove edge is arranged at the bottom end of the pull rod. The cross section of the groove edge is one of triangle, rectangle and semicircular combined graph.

Preferably, the groove blade rotates with the tie rod by itself with the central axis in the length direction of the tie rod as the rotation axis, or the groove blade rotates by itself with the point of connection between the groove blade and the tie rod as the origin and with the central axis in the length direction of the tie rod as the rotation axis.

Preferably, the system comprises a plurality of said semi-circular bases. Any one of the semicircular bases is independently connected with a pull rod through a connecting ball.

Preferably, the number of the semicircular bases is 1 to 100, preferably 3 to 80, more preferably 5 to 50.

Preferably, the pull rod is arranged in a telescopic structure, and preferably, the pull rod is in a sleeved telescopic structure.

Preferably, the groove blade is arranged in a telescopic structure, and preferably, the groove blade is in a sleeved telescopic structure.

Preferably, the slot blade and the pull rod are positioned on the same central axis, or an included angle is formed between the slot blade and the pull rod.

Preferably, the system further comprises a control unit. The control unit is connected with the connecting ball, the pull rod and the groove edge in a one-to-one independent mode.

In the prior art, after the completion of the sintering mixture cloth, a flat material surface with a horizontal plane is formed (fig. 3-a) or a flat material surface with inclined waists on both sides is formed (fig. 3-b) when the super trolley breast board cloth is formed. The sintered material surface is molded into a simple horizontal surface shape, and the material surface shaping method is favorable for uniform distribution of air flow at all parts of the material surface, but has large material surface tension, and is easy to form transverse or longitudinal cracks on the material surface due to shrinkage of the sintered ore volume in the cooling process of the sintered ore, so that the quality of sintered ore products is influenced.

In the invention, a process of firstly forming a groove on a sintering material surface and then sintering is provided. The prior art has different leveling material levels, and the sintering material level is provided with grooves and then is a mixed structure material level formed by combining the mutually-spaced leveling material levels and the grooves. The shape of the grooves may be V-shaped (FIG. 4-a), semi-circular (FIG. 4-b), rectangular (FIG. 4-c), etc. The grooves can be distributed equidistantly or gradually or densely from the middle point to two sides or according to other rules. The shape of the groove in the direction of travel of the trolley (direction indicated by the arrow in fig. 5) may be straight (fig. 5-a) or curved (fig. 5-b) or other similar shape. The invention divides the whole sintering material surface into a plurality of smaller single-section flat material surfaces by forming grooves on the sintering material surface. After being divided into a plurality of single-section flat material surfaces, the single-section flat material surfaces are small in surface tension, so that the internal stress generated by shrinkage and stretching of the surface layers of the material surfaces is small when the material surfaces are sintered and cooled, and further the problem that transverse or longitudinal cracks are formed on the material surfaces under the action of the internal stress is effectively avoided.

In the invention, in consideration of the diversity of actual working conditions, in the production process, the operating parameters such as the height of the sintering material surface, the temperature of the ignition furnace and the like can fluctuate along with the working conditions, and the spacing between the central axes of adjacent grooves, the opening depth of the grooves, the opening width of the grooves and the like are correspondingly adjusted to realize the optimal technical effect. Therefore, the number, depth, opening width and the like of the grooves of the sintered material surface need to be accurately designed and adjusted in real time. According to the invention, the width of the single-section plane is determined according to the width of the sintering material surface, the allowable stress of the sintering ore and the temperature difference before and after the sintering ore is cooled, and then the number of grooves is determined according to the width of the single-section plane, and the distance between the central axes of the adjacent grooves is further determined. Secondly, determining the opening depth of the grooves according to ignition temperature of the ignition furnace, width of the sintering material surface and the opening quantity of the grooves. And finally, determining the opening width of the groove according to the length of the groove edge of the groove opening tool and the opening depth of the groove.

In the invention, the opening quantity of the regulating grooves, the opening depth of the regulating grooves and the opening width of the regulating grooves are all regulated by adopting a material surface shaping device. The whole charge level shaping device is fixed at the installation position (on the ignition furnace front wall body) by adopting a welding mode or a bolt connection mode through a fixed support. The material surface shaping device comprises a fixed support, a semicircular base, a connecting ball, a pull rod and a groove blade. One end of at least one semicircular base is fixed on the fixed support. The other end of any one semicircular base is independently connected with one end of the pull rod through a connecting ball. The other end of the pull rod is provided with the groove edge. The connecting ball can freely rotate in the semicircular base, so that the pull rod is driven to rotate in a plane perpendicular to the length direction of the material surface by taking the connecting ball as the center of a circle (360-degree azimuth selection can be realized). The rotation (first rotation angle) of the pull rod in the plane of the axis of the sintering material surface in the length direction is used for adjusting the vertical height of the bottom end of the pull rod. The rotation (second rotation angle) of the tie rod in the plane in which the axis of the sintering material surface in the width direction is located is used to adjust the interval between the bottom ends of the adjacent tie rods. Simultaneously, the pull rod can also rotate (third rotation angle) by taking the central axis along the length direction of the pull rod as a rotation shaft, so as to drive the autorotation of the groove blade arranged at the bottom end of the pull rod and the like, thereby realizing the purpose of adjusting the included angle between the groove blade and the sintered material surface in the width direction of the material surface, namely realizing the purpose of adjusting the opening width of the groove formed by the groove blade in the material surface. The longitudinal direction of the charge level refers to the direction in which the sintering pallet is traveling. The width direction of the material surface refers to the horizontal direction perpendicular to the running direction of the sintering trolley. Taking fig. 5 as an example, the left-right direction (also referred to as the forward-backward direction of the carriage running) indicated by the arrow is the longitudinal direction of the stock surface, perpendicular to the view plane. The vertical direction perpendicular to the direction indicated by the arrow is the width direction of the material surface.

In the invention, because the operating parameters such as the height of the sintering material surface, the temperature of the ignition furnace and the like can fluctuate along with working conditions in the production process, the process parameters such as the spacing between the central axes of adjacent grooves (determining the number of the grooves to be opened), the opening depth of the grooves, the opening width of the grooves and the like are correspondingly adjusted in order to realize the optimal technical effect. In the invention, the determination principle of the space between the central axes of adjacent grooves (determining the number of the grooves) is as follows: the number of grooves on the surface of the sinter bed is as small as possible on the premise of ensuring that shrinkage stress is insufficient to tear surface ores, so that negative effects caused by inconsistent surface ores due to material surface trench pulling are reduced. Actual shrinkage stress delta formed by shrinkage of surface sinter due to cooling _{Real world} Is positively correlated with the width M of the sintering material surface and the temperature reduction amplitude (the temperature difference between the sintering ore before and after cooling) DeltaT. The method comprises the following steps:

δ _{real world} =k1·m·Δt. (formula 1).

In order to prevent cracking during the shrinkage of the sintered charge level, the actual shrinkage stress delta _{Real world} Must be smaller than the allowable stress delta (kPa) of the sinter, therefore, the maximum width V of the single-stage burden surface should be:

v=δ/(k1·Δt), (formula I).

I.e. to ensure the actual shrinkage stress delta _{Real world} The allowable stress delta of the sinter is required to be smaller than that of the sinter, and the width value of the actual single-section material surface formed after the groove is formed is required to be smaller than or equal to the calculated value V and m of the formula I.

Further, on the sintered material surface with the total width of M, when the width of the single-section material surface formed after the grooves are formed is V, the required number of grooves formed is n:

n= { M/V } -1..(formula II).

In the formula II, "{ }" is an upward rounding symbol, and represents that the value is the smallest integer greater than or equal to the target value. E.g., {2} = 2; {3.12} = 4; {3.85} = 4.

In general, the number N of grooves is limited by the total number N of the pull rods; namely:

n=min [ ({ M/V } -1), N ] (formula 2).

In actual conditions, the total number of tie rods is set to meet the process with the maximum sinter level width. Aiming at the working condition of the width of the sintering material surface, the corresponding number of pull rods meeting the production requirement can be selectively used according to the actual width of the sintering material surface.

Further, the distance x between the central axes of adjacent trenches can be further calculated by the formula II:

x=m/(n+1), (formula III).

In the invention, the principle of determining the opening depth of the groove is as follows: in actual working conditions, the opening depth of the groove is too shallow, the generated groove is easy to deform at high temperature after the ignition process, and the purpose of reducing shrinkage stress can not be realized by dividing the material surface after ignition into a plurality of small sections of flat material surfaces. Meanwhile, the open depth of the groove is too deep, so that the inconsistency of the material layers in the width direction is aggravated, and the quality of the sintered mineral products is affected. Therefore, based on the principle of resisting the deformation of the material surface in the ignition process, the relation between the proper groove opening depth and the sintering material surface width M, the ignition temperature T1 of the ignition furnace and the opening number n of the grooves is as follows:

d·n=k2·t1·m. (formula 3);

further convert into:

d= (k2·t1·m)/n. (formula IV).

In the formula IV, d is the opening depth of the groove, and m. k2 is an empirical coefficient of the trench depth, and is obtained by field test and has a value of 1.1X10 ^-5 ～3.0×10 ^-5 Preferably 1.5X10. Degree.C ^-5 ～2.5×10 ^-5 Per DEG C, e.g. 2.38X10 ^-5 and/C. M is the width of the sintered material surface and M. n is the number of grooves; t1 is the ignition temperature of the ignition furnace and DEG C.

In the invention, the opening width of the groove is determined according to the following principle: in practical conditions, experiments show that the capability of the groove to resist thermal expansion and thermal contraction is positively correlated with the length of the hypotenuse of the cross section of the groove (i.e. the length of the groove edge) C (i.e. the longer the hypotenuse length, the stronger the capability of the groove to resist thermal expansion and thermal contraction). Thus, the relationship between the opening width b of a suitable trench and the opening depth d of the trench can be expressed as:

C ² ＝d ² +b ² .. (formula 4);

further convert into:

/>

in the formula V, b is the opening width of the groove, and m. d is the opening depth of the groove and m. C is the length of the hypotenuse of the cross section of the groove (i.e. the length of the groove edge), m.

In the invention, after the number of the pull rods (which is equal to the number of the grooves), the opening depth of the grooves and the opening width of the grooves are determined, the specification of the grooves formed by the pull rods driving the groove blades is set to be a set target value by adjusting the first rotation angle, the second rotation angle and the third rotation angle of the pull rods. All the pull rods are numbered as 1,2, i and n in sequence along the width direction of the sintering material surface. Setting the first rotation angle of any pull rod as theta (namely the rotation angle of the pull rod in the plane where the axial line of the pull rod in the length direction of the sintering material surface is positioned), and the first rotation angle is formed; then there are:

In the formula VI, d is the opening depth of the groove and m. H is the vertical height of the sphere center of the connecting sphere from the sintering material surface, and m. L is the length of the pull rod, m. The first rotation angle of the pull rod has a value range of 0-90 degrees. In the plane of the axis in the length direction of the sintering material surface; when the pull rod is perpendicular to the sintering material surface, the first rotation angle of the pull rod is 0 degrees. When the tie rod is parallel to the sinter level, the first rotation angle of the tie rod is 90 °.

In the present invention, the third rotation angle of any one of the tie rods is set to α (the self-rotation angle using the center axis of the tie rod as the rotation axis), and is set to α; then there are:

α=arcsin (b/C.) (formula VII).

In the invention, all the pull rods are numbered as 1,2, i and n in sequence in the width direction of the sintering material surface. Sequentially calculating the rotation angle beta of the pull rod in the plane of the axis of the sintered material surface in the width direction according to the following mode _i Setting beta ₁ The constant value is 0 DEG, i is more than or equal to 1 and less than n. Then:

it should be noted that the second rotation angle of the 1 st pull rod is constant at 0, and then the second rotation angles of the adjacent pull rods are sequentially adjusted with the 1 st pull rod as the starting point to be beta respectively _i And beta _i+1 The distance between central axes of any group of adjacent grooves is x (namely, the second rotation angle of the 2 nd pull rod is adjusted based on the 1 st pull rod, then the second rotation angle of the 3 rd pull rod is adjusted based on the 2 nd pull rod, and so on until the adjustment of the second rotation angle of the n pull rods is completed).

Further, it should be noted that: in the actual adjustment process, when the calculated interval x between the central axes of the theoretical adjacent grooves is too large, the rotation angle of the (i+1) th pull rod in the two pull rods in the plane of the axes of the two pull rods in the width direction of the sintering material surface is 90 degrees (namely beta) _i+1 When the distance requirement cannot be met after the pull rod is in the range of 90 DEG, the length of the pull rod is increased or the pull rod replaces the current pull rod to serve as a new adjacent pull rod to be adjusted. (for example, when the two rotation angles of the 3 rd pull rod are calculated based on the 2 nd pull rod, even if the second rotation angle of the current 3 rd pull rod is 90 degrees, the current 3 rd pull rod is withdrawn from the grooving operation, that is, the first rotation angle of the current 3 rd pull rod is adjusted to 90 degrees, then the two rotation angles of the 4 th pull rod are directly calculated based on the 2 nd pull rod, that is, the original pull rod with the number 4 replaces the original pull rod with the number 3 to be a new pull rod with the number 3, and the numbers of the pull rods ordered at the back are changed correspondingly).

Further 20301) when beta _i+1 When the ratio of x to (Z-L.sin theta.sin beta) is less than or equal to 90 DEG _i +L·sinθ·sinβ _i+1 ). The following steps are performed: the rotation angle beta of the (i+1) th pull rod in the plane of the axis of the sintered material surface in the width direction of the sintered material surface in the material surface shaping device is sequentially adjusted according to the formula (VIII) _i+1 So that the spacing between the two tie rods numbered i and (i+1) (i.e., the spacing between the central axes of two adjacent grooves) is x:

Further, 20302) when beta _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) The length of the pull rod is gradually increased to be L' = (L+L) _s ). Then substituting L' into (formula VI) to recalculate to obtain new value of theta, continuing to perform step 20302), and performing iterative calculation until x is less than or equal to (Z-L.sin theta.sin beta) _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed). Wherein L is _s The value of the length of the pull rod added for each step is 1-100mm, preferably 5-80mm.

Alternatively, when beta _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) And (3) the current (i+1) th pull rod is withdrawn from the groove pulling operation. And then taking the (i+2) th pull rod as the next calculation target of the i th pull rod for calculation. That is, after the original (i+1) th tie rod is withdrawn from the trench, the step 20302) is continued with the original (i+2) th tie rod as a new (i+1) th tie rod, and the iterative calculation is performed in this way until x is not more than (Z-L.sin θ.sin β) _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed).

In summary, on the sintered material surface with the total width M calculated according to the actual working condition, when the single-segment planar material surface width is V, the number of grooves required to be opened is calculated as n of (formula II), the distance between the central axes of adjacent grooves is calculated as x of (formula III), the opening depth of the grooves is calculated as d of (formula IV), and the opening width of the grooves is calculated as b of (formula V). By adjusting the material surface shaping device, only n pull rods are used for openingThe grooves are formed, and the first rotation angles of all the tie rods are adjusted to be the calculated value theta of the formula VI, and the third rotation angles of all the tie rods are adjusted to be the calculated value alpha of the formula VII. Adjusting the second rotation angle of the 1 st pull rod to be 0 constantly, and then sequentially adjusting the second rotation angles of the 2 nd to the n th pull rods to be the calculated value beta of the formula VIII _i+1 And the specifications of the formed grooves can be enabled to accord with the current working condition.

In the invention, the sintering charge level shaping system comprises a charge level shaping device, a sintering trolley and an ignition furnace. The material surface shaping device is arranged at the front end of the ignition furnace and is positioned above the sintering trolley. The sintering trolley filled with the sintering mixture is firstly operated to the material surface shaping device, and then operated to the ignition furnace for sintering treatment after the groove is formed on the sintering material surface by the material surface shaping device.

In the invention, the material surface shaping device rotates (first rotation angle) in the plane by adjusting the axis of the pull rod in the length direction of the sintered material surface, so that the depth of the groove blade entering the sintered mixture is controlled to be the opening depth of the groove. By adjusting the axes of two adjacent pull rods in the width direction of the sintering material surface to rotate (second rotation angle), the adjustment sequence of the pull rods is generally carried out according to the ordering direction of the pull rods, and the ordering sequence of the pull rods is as follows: all the pull rods are sequentially ordered to be 1,2, i and n from one side to the other side of the sintered material surface in the width direction of the sintered material surface. When adjusting the second rotation angle of two adjacent tie rods (i-th tie rod and (i+1) -th tie rod), it is generally only necessary to adjust the second rotation angle of the (i+1) -th tie rod, because the second rotation angle of the (i) -th tie rod is already determined by the second rotation angle of the (i-1) -th tie rod, and so on, the second rotation angle of the 2 nd tie rod is determined by the second rotation angle of the 1 st tie rod. In general, the second rotation angle of the 1 st pull rod is always 0 degree (for convenience of operation and calculation).

The second rotation angle of the pull rod is within the range of-90 to 90 degrees. When the central axis of the pull rod and the sintered material surface are longWhen the axes in the degree direction are parallel, the second angle of the pull rod is 0 degrees. In the width direction of the sintering material surface, when the central axis of the pull rod is parallel to the axis in the width direction of the sintering material surface and the bottom end of the pull rod points to the trend direction of the sequence number of the pull rod, the second angle of the pull rod is-90 degrees. In the width direction of the sintered material surface, when the central axis of the pull rod is parallel to the axis in the width direction of the sintered material surface and the bottom end of the pull rod points to the direction from which the serial number of the pull rod is oriented, the second angle of the pull rod is 90 degrees. In the present invention, when the second angle of the tie rod is negative, all the above calculations (formulas I-IX) relate to sin beta in the formula of the calculation of the second angle of the tie rod _i The value of (2) is sin I beta _i And I. For example when beta _i When the angle is-30 DEG, the value is sin beta _i =sin=30° i=sin 30° =0.5. Similarly, when calculating beta _i If (Z-V-0.5.b) < 0, then the beta obtained by calculation is used in formula VII _i Should be considered as a negative angle. For example, when (Z-V-0.5. B) < 0, beta obtained by calculation of (formula VII) _i The value is 60 deg., then during the actual adjustment the second rotation angle of the pull rod should be adjusted to-60 deg.. Conversely, when (Z-V-0.5. B) > 0, beta _i Is a positive angle. And when (Z-V-0.5·b) =0, β _i ＝0°。

In the invention, a plurality of semicircular bases are arranged in the material surface shaping device. Any one of the semicircular bases is independently connected with a pull rod through a connecting ball. The number of the semicircular bases, the number of the connecting balls and the number of the pull rods are identical. The number of semicircular seats is 1 to 100, preferably 3 to 80, more preferably 5 to 50. The semicircular bases are uniformly arranged on the front wall of the ignition furnace through the fixing support (the fixing support can be a large fixing support which spans the front wall of the whole ignition furnace, or can be a plurality of small fixing supports which are consistent with the semicircular bases in number). The distances between the centers of any two adjacent connecting balls are equal. It should be noted that the vertical distance between the two side edges of the sintered material surface and the center of the first connecting ball or the center of the last connecting ball is equal to the distance between any two adjacent connecting balls.

In the present invention, the system further comprises a control unit. The control unit is connected with the connecting ball, the pull rod and the groove edge in a one-to-one independent mode. The rotation and the extension of the connecting ball, the pull rod and the groove blade can be independently regulated by the control unit.

In the present invention, the width of the sintering pallet is 0.5 to 30m, preferably 1 to 20m, more preferably 2 to 15m. The semicircular base is of a rectangular structure with semicircular connectors, and the thickness of the rectangular body is 1-1200cm, preferably 10-1000cm, and more preferably 20-800cm. The diameter of the connecting ball is 1-800cm, preferably 3-500cm, more preferably 5-300cm. The pull rod is of a cylindrical structure, and the diameter of the pull rod is 5-1000cm, preferably 10-800cm, and more preferably 15-600cm.

Compared with the prior art, the invention has the following beneficial technical effects:

1. according to the invention, the grooves are formed in the sintering material mixing surface, so that the sintering material mixing surface is divided into a plurality of small flat material surfaces, and further, the internal stress of the sintering material surface is reduced in the sintering cooling process, so that transverse or longitudinal cracks are prevented from being formed on the material surface, and even the transverse or longitudinal cracks are further developed into through seams penetrating through a sintering material layer, and the quality of sintered mineral products is seriously influenced.

2. In the invention, because the operating parameters such as the height of the sintering material surface, the temperature of the ignition furnace and the like can fluctuate along with the working condition in the production process, the trench pulling distance, the depth, the width and the like are correspondingly adjusted in order to realize the optimal technical effect. The sintering material surface groove is provided with the adjusting control strategy, so that the material surface shaping device can be accurately adjusted to be in an optimal working state in real time under the condition of fluctuation of sintering working conditions.

3. The process disclosed by the invention is simple in operation flow, high in control accuracy, good in effect of preventing the formation of transverse or longitudinal cracks on the material surface, simple in structure, low in input cost, capable of realizing intelligent self-adaptive operation, suitable for sintering material surface shaping operation under different working conditions and easy to popularize.

Drawings

FIG. 1 is a flow chart of a method for shaping a sintered charge level according to the present invention.

Fig. 2 is a schematic diagram of a prior art sintering machine.

Fig. 3 is a diagram of a prior art sintered charge level structure.

FIG. 4 is a side view of a sintered charge level with grooves according to the present invention.

FIG. 5 is a schematic diagram showing a top view of a sintered charge level with grooves according to the present invention

FIG. 6 is a schematic diagram of a system for shaping the surface of a sintered material according to the present invention.

FIG. 7 is a top view of the sinter level shaping system of the invention.

Fig. 8 is a schematic diagram of the charge level shaping device according to the present invention.

FIG. 9 is a schematic view of the connection of the connecting ball, the tie rod and the slot blade according to the present invention.

FIG. 10 is a schematic diagram of the depth adjustment of the open-end of the trench in the sinter level of the invention.

FIG. 11 is a schematic diagram of the pitch adjustment between the central axes of adjacent grooves of the sinter level of the invention.

FIG. 12 is a schematic diagram of the opening width adjustment of the sintered charge level channel of the present invention.

Fig. 13 is a schematic diagram of a control mechanism of the charge level shaping device according to the present invention.

FIG. 14 is a control logic diagram I of the method of sinter level shaping of the invention.

FIG. 15 is a second control logic diagram of the method of sinter level shaping of the invention.

Reference numerals: 1: a material surface shaping device; 11: a fixed support; 12: a semicircular base; 13: a connecting ball; 14: a pull rod; 15: a slot edge; 2: sintering trolley; 3: igniting a furnace; 4: a sintering machine; 5: and a control unit.

Detailed Description

The following examples illustrate the technical aspects of the invention, and the scope of the invention claimed includes but is not limited to the following examples.

A method of sinter charge level shaping, the method comprising the steps of:

Preferably, the grooves are formed in the surface of the sintered material.

Preferably, in step 2), the trench opening includes the steps of:

Preferably, the opening quantity of the regulating grooves, the opening depth of the regulating grooves and the opening width of the regulating grooves are all regulated by adopting a material surface shaping device. The material surface shaping device comprises a fixed support 11, a semicircular base 12, a connecting ball 13, a pull rod 14 and a groove blade 15. One end of the semicircular base 12 is fixed on the fixed support 11. The other end of the semicircular base 12 is connected with one end of a pull rod 14 through a connecting ball 13. The other end of the pull rod 14 is provided with the groove edge 15.

Generally, the semicircular base 12, the connecting ball 13 and the pull rod 14 are all provided in plurality, and the number of them is consistent.

v=δ/(k1·Δt), (formula I).

Then, the number n of grooves is:

n= { M/V } -1..(formula II).

Further, the distance x between the central axes of adjacent grooves is:

x=m/(n+1), (formula III).

d= (k2·t1·m)/n. (formula IV).

In the formula IV, d is a grooveM, the opening depth of the steel plate. k2 is an empirical coefficient of the trench depth, and is obtained by field test and has a value of 1.1X10 ^-5 ～3.0×10 ^-5 Preferably 1.5X10. Degree.C ^-5 ～2.5×10 ^-5 Per DEG C, e.g. 2.38X10 ^-5 and/C. M is the width of the sintered material surface and M. n is the number of grooves.

Preferably, the trench opening width b is:

in the formula (V), b is the opening width of the groove, and m. d is the opening depth of the groove, m, and C is the length of the groove edge 15, m.

Preferably, step 202) specifically comprises: the rotation angles of the pull rod 14 in the plane where the axis of the sintered charge level in the charge level shaping device is positioned are all theta, so that the opening depth of the groove is d, and then:

in the formula VI, d is the opening depth of the groove and m. H is the vertical height of the center of the connecting ball 13 from the sinter level, m. L is the length of the pull rod 14, m.

Preferably, step 204) specifically includes: adjusting the self-rotation angle alpha of the groove blade 15 in the charge level shaping device with the central axis of the pull rod 14 as the rotation axis to make the opening width of the groove be b:

α=arcsin (b/C.) (formula VII).

In formula VII, α is a self-rotation angle of the slot blade 15 about the central axis of the tie rod 14 as a rotation axis. b is the opening width of the trench, m. C is the length of the slot edge 15, m.

Preferably, step 203) specifically includes: all the pull rods 14 are numbered as 1,2, i, n in sequence in the width direction of the sintered material surface. The rotation angle beta of the pull rod 14 in the plane of the axis of the sintering material surface in the width direction is sequentially calculated according to the following steps _i Setting beta ₁ The constant value is 0 DEG, i is more than or equal to 1 and less than n. Then:

20301 When beta is _i+1 When the ratio of x to (Z-L.sin theta.sin beta) is less than or equal to 90 DEG _i +L·sinθ·sinβ _i+1 ). The following steps are performed: the rotation angle beta of the (i+1) th pull rod 14 in the plane of the axis of the sintered material surface in the width direction of the sintered material surface in the material surface shaping device is sequentially adjusted according to the formula (VIII) _i+1 Such that the spacing between the (i+1) th and (i) th tie rods 14 (i.e., the spacing between the central axes of two adjacent grooves) is x:

in (formula VIII), beta _i+1 Is the rotation angle in the plane of the (i+1) th tie rod 14 in the width direction of the sintered material surface. x is the distance between the central axes of adjacent grooves, and m. Z is the distance between the centers of two adjacent connecting balls 13, and m. L is the length of the pull rod 14, m. θ is the rotation angle in the plane of the axis of the tie rod 14 in the length direction of the sinter level.

20302 When beta is _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) The length of the pull rod 14 is gradually increased to l= (l+l) _s ). Then substituting L' into (formula VI) to recalculate to obtain new value of theta, continuing to perform step 20302), and performing iterative calculation until x is less than or equal to (Z-L.sin theta.sin beta) _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed). Wherein L is _s The length of the tie rod 14 added for each step is 1-100mm, preferably 5-80mm.

Alternatively, when beta _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) The current (i+1) th tie rod 14 is withdrawn from the trenching operation. The (i+2) th tie rod 14 is then calculated as the next calculation target of the i-th tie rod 14. That is, when the original (i+1) th tie rod 14 is withdrawn from the trenching operation, the step 20302 is continued with the original (i+2) th tie rod 14 as a new (i+1) th tie rod 14), and the iterative calculation is performed in this way until x is not more than (Z-L ·)sinθ·sinβ _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed).

A sintered charge level shaping system includes a charge level shaping device 1, a sintering pallet 2, and an ignition furnace 3. The charge level shaping device 1 is arranged at the front end of the ignition furnace 3, and the charge level shaping device 1 is positioned above the sintering pallet 2.

Preferably, the charge level shaping device 1 comprises a fixed support 11, a semicircular base 12, a connecting ball 13 and a pull rod 14. One end of the fixed support 11 is fixed on the side wall of the front end of the ignition furnace 3. The other end of the fixed support 11 is fixedly connected with one end of a semicircular base 12. The other end of the semicircular base 12 is connected with the top end of a pull rod 14 through a connecting ball 13. The pull rod 14 rotates in the semicircular base 12 through the connecting ball 13.

Preferably, the rotation of the tie rod 14 in the semicircular base 12 by the connection ball 13 includes a rotation of the tie rod 14 in a plane in which an axis of the connection ball 13 in the length direction of the upper surface of the sintering pallet 2 is located with the origin, a rotation of the tie rod 14 in a plane in which an axis of the connection ball 13 in the width direction of the upper surface of the sintering pallet 2 is located with the origin, and a self rotation of the tie rod 14 with the center axis of the tie rod 14 in the length direction thereof as a rotation axis.

Preferably, the system further comprises a fluted edge 15. The slot edge 15 is arranged at the bottom end of the pull rod 14. The cross section of the groove edge 15 is one of triangle, rectangle and semicircular combined patterns.

Preferably, the slot blade 15 rotates with the tie rod 14 by itself with the central axis of the tie rod 14 in the longitudinal direction thereof as a rotation axis, or the slot blade 15 rotates by itself with the connection point of the slot blade 15 and the tie rod 14 as an origin and with the central axis of the tie rod 14 in the longitudinal direction thereof as a rotation axis.

Preferably, the system includes a plurality of said semi-circular bases 12. Any one of the semicircular bases 12 is independently connected with a pull rod 14 through a connecting ball 13.

Preferably, the number of the semicircular bases 12 is 1 to 100, preferably 3 to 80, more preferably 5 to 50.

Preferably, the pull rod 14 is provided with a telescopic structure, and preferably, the pull rod 14 is provided with a sleeved telescopic structure.

Preferably, the groove blade 15 is provided with a telescopic structure, and preferably, the groove blade 15 is provided with a telescopic structure.

Preferably, the slot edge 15 and the pull rod 14 are located on the same central axis, or an included angle is formed between the slot edge 15 and the pull rod 14.

Preferably, the system further comprises a control unit 5. The control unit 5 is connected with the connecting ball 13, the pull rod 14 and the groove blade 15 in a one-to-one independent mode.

Example 1

As shown in fig. 1, a method for shaping a sintered charge level includes the steps of:

Example 2

Example 1 was repeated, as shown in fig. 4 (a), except that in step 2), the grooves were V-shaped in cross section.

Example 3

Example 1 was repeated, as shown in fig. 4 (b), except that in step 2), the grooves were semicircular in cross section.

Example 4

Example 1 was repeated, as shown in fig. 4 (c), except that in step 2), the grooves were rectangular in cross section.

Example 5

Example 4 was repeated, as shown in fig. 5 (a), except that in step 2), the grooves were opened in a plurality on the sintered charge level.

The arrangement mode of the plurality of grooves is as follows: and a plurality of grooves are distributed equidistantly in the width direction of the sintering material surface. In the length direction of the sintering material surface, the grooves are of a linear design.

Example 6

Example 4 was repeated, as shown in fig. 5 (b), except that in step 2), the grooves were opened in a plurality on the sintered charge level.

The arrangement mode of the plurality of grooves is as follows: and a plurality of grooves are distributed equidistantly in the width direction of the sintering material surface. The grooves are of curved design in the length direction of the sintered charge level.

Example 7

Example 5 was repeated except that in step 2), the trench opening comprises the steps of:

Example 8

Example 7 was repeated except that in step 201), first, the width of the single-stage level was determined based on the sinter level width, the sinter allowable stress, and the temperature difference between before and after the sinter was cooled, and then the number of grooves to be opened and the distance between the central axes of the adjacent grooves were determined based on the width of the single-stage level. Secondly, determining the opening depth of the grooves according to ignition temperature of the ignition furnace, width of the sintering material surface and the opening quantity of the grooves. And finally, determining the opening width of the groove according to the length of the groove edge of the groove opening tool and the opening depth of the groove.

Example 8

Example 7 was repeated, as shown in fig. 6 to 8, except that it is preferable that the number of the openings of the grooves, the opening depth of the grooves, and the opening width of the grooves were all adjusted by using a charge level shaping device. The material surface shaping device comprises a fixed support 11, a semicircular base 12, a connecting ball 13, a pull rod 14 and a groove blade 15. One end of the semicircular base 12 is fixed on the fixed support 11. The other end of the semicircular base 12 is connected with one end of a pull rod 14 through a connecting ball 13. The other end of the pull rod 14 is provided with the groove edge 15.

Example 9

Example 8 was repeated except that the allowable stress of the obtained sinter was measured to be δ, kPa. The width of the sintering material surface is M and M. The temperature difference before and after the cooling of the sinter is delta T and DEG C. The width V of the single-section flat material surface after the grooves are formed on the sintering material surface is as follows:

v=δ/(k1·Δt), (formula I).

In the formula I, V is the width of a single-section flat material surface after a groove is formed on the sintering material surface, and m. k1 is an empirical coefficient of the surface stress of the sinter, and is obtained by field test and has a value of 4.2 kPa/mdeg.C.

Then, the number n of grooves is:

n= { M/V } -1..(formula II).

Further, the distance x between the central axes of adjacent grooves is:

x=m/(n+1), (formula III).

Example 10

Example 9 was repeated except that the ignition temperature of the ignition furnace was measured to be 1050 c at T1. The sintered charge level width M was obtained to be 4M. k2 is an empirical coefficient of the trench depth, and is obtained by field test and has a value of 2.38X10 ^-5 and/C. The number of grooves n=4; the opening depth d of the groove is:

d＝(k2·T1·M)/n＝0.025m＝25mm。

example 11

Example 10 was repeated except that the length of the slot edge 15 was measured to be C,0.050m. The calculated opening depth d of the groove is 0.025m. The opening width b of the trench is:

Example 12

Example 11 was repeated, and as shown in FIG. 10, the vertical height H of the center of the connecting ball 13 from the sintered material surface was measured and obtained to be 1m. The length L of the tie rod 14 is 1.5m. When the rotation angles of the tie rod 14 in the plane where the axis of the sintered charge level in the charge level shaping device is located are all θ so that the opening depth of the groove is d=0.025m, then:

example 13

Example 12 is repeated as shown in fig. 12. The length C of the slot edge 15 was measured to be 0.050m. The opening width b of the groove was calculated to be 0.043m. Adjusting the self-rotation angle alpha of the groove blade 15 in the charge level shaping device with the central axis of the pull rod 14 as the rotation axis to make the opening width of the groove be b:

α＝arcsin(b/C)＝59.4°。

example 14

Example 13 was repeated, and as shown in fig. 13, the pitch Z between the centers of two adjacent connection balls 13 was measured and obtained to be 0.8m. The length L of the tie rod 14 is 1.5m. And calculating to obtain the single-section flat material surface width V of 0.5m after the sintering material surface is provided with the grooves. The rotation angle θ of the tie rod 14 in the plane in which the axis in the length direction of the sinter level lies was 46.9 °. All the pull rods 14 are numbered as 1,2, i, n in sequence in the width direction of the sintered material surface. Setting the rotation angle beta of any one pull rod 14 in the plane of the axis in the width direction of the sintering material surface _i 0 deg.. Wherein, set beta ₁ The constant value is 0 DEG, i is more than or equal to 1 and less than n.

Example 15

Example 14 is repeated as in the figure11, only when beta _i+1 When the ratio of x to (Z-L.sin theta.sin beta) is less than or equal to 90 DEG _i +L·sinθ·sinβ _i+1 ). The following steps are performed: the rotation angle beta of the (i+1) th pull rod 14 in the plane of the axis of the sintered charge level width direction in the charge level shaping device is sequentially adjusted according to the formula (VIII) _i+1 Such that the spacing between the (i+1) th and (i) th tie rods 14 (i.e., the spacing between the central axes of two adjacent grooves) is x:

Example 16

Example 14 was repeated except that beta _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) The length of the pull rod 14 is gradually increased to l= (l+l) _s ). Then substituting L' into (formula VI) to recalculate to obtain new value of theta, continuing to perform step 20302), and performing iterative calculation until x is less than or equal to (Z-L.sin theta.sin beta) _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed). Wherein L is _s The length of the tie rod 14 added for each step was 10mm.

Example 17

Example 16 was repeated except that beta _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) The current (i+1) th tie rod 14 is withdrawn from the trenching operation. The (i+2) th tie rod 14 is then calculated as the next calculation target of the i-th tie rod 14. That is, when the original (i+1) th tie rod 14 is withdrawn from the trenching operation, the original (i+2) th tie rod 14 is used as a new (i+1) th tie rod 14, and the process proceeds to step 20302) Performing iterative calculation according to the above steps until x is less than or equal to (Z-L.sin theta.sin beta) _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed).

Example 18

As shown in fig. 6 to 7, a sintered charge level shaping system includes a charge level shaping device 1, a sintering pallet 2, and an ignition furnace 3. The charge level shaping device 1 is arranged at the front end of the ignition furnace 3, and the charge level shaping device 1 is positioned above the sintering pallet 2.

Example 19

Example 18 is repeated, as shown in fig. 8-9, except that the charge level shaping device 1 comprises a fixed support 11, a semicircular base 12, a connecting ball 13 and a tie rod 14. One end of the fixed support 11 is fixed on the side wall of the front end of the ignition furnace 3. One end of a semicircular base 12 is fixedly connected to the other end of the fixed support 11. The other end of the semicircular base 12 is connected with the top end of a pull rod 14 through a connecting ball 13. The pull rod 14 rotates in the semicircular base 12 through the connecting ball 13.

Example 20

Example 19 was repeated except that the rotation of the tie rod 14 in the semicircular base 12 through the connection ball 13 included the rotation of the tie rod 14 in the plane of the axis of the connection ball 13 in the length direction of the upper surface of the sintering pallet 2 as the origin, included the rotation of the tie rod 14 in the plane of the axis of the connection ball 13 in the width direction of the upper surface of the sintering pallet 2 as the origin, and included the self-rotation of the tie rod 14 with the central axis of the tie rod 14 in the length direction as the rotation axis.

Example 21

Example 20 is repeated except that the system further includes a fluted edge 15. The slot edge 15 is arranged at the bottom end of the pull rod 14. The cross section of the groove edge 15 is rectangular.

Example 22

Example 21 is repeated except that the groove blade 15 rotates with the tie rod 14 by itself with the center axis of the tie rod 14 in the longitudinal direction thereof as the rotation axis.

Example 23

Example 22 is repeated as shown in fig. 7, except that the system includes a plurality of said semi-circular bases 12. Any one of the semicircular bases 12 is independently connected with a pull rod 14 through a connecting ball 13. The number of the semicircular bases 12 is 80.

Example 24

Example 23 is repeated except that the slot edge 15 and the pull rod 14 are located on the same central axis, and the pull rod 14 is of a telescopic structure.

Example 25

Example 24 is repeated except that the slot edge 15 is of a telescopic structure.

Example 26

Example 25 is repeated as shown in fig. 14, except that the system further comprises a control unit 5. The control unit 5 is connected with the connecting ball 13, the pull rod 14 and the groove blade 15 in a one-to-one independent mode.

Claims

1. A method for shaping a sintered charge level, characterized by: the method comprises the following steps:

1) Firstly, filling a sintering mixture into a sintering trolley from the front part of a sintering machine;

2) Then, forming grooves on the sintering material surface in the sintering trolley, so that the sintering material surface becomes a mixed structure material surface formed by combining a flat material surface and the grooves; the trench is formed by the following steps:

201 Determining the number of grooves, the depth of the grooves and the width of the grooves according to the actual working conditions; firstly, determining the width of a single-section flat material surface according to the width of the flat material surface, the allowable stress of the agglomerate and the temperature difference before and after the agglomerate is cooled, and determining the number of grooves and further determining the distance between central axes of adjacent grooves according to the width of the single-section flat material surface; secondly, determining the opening depth of the groove according to ignition temperature of the ignition furnace, width of the sintering material surface and the opening quantity of the groove; finally, determining the opening width of the groove according to the length of the groove edge of the groove opening tool and the opening depth of the groove;

Setting allowable stress of the sinter as delta and kPa; the width of the sintering material surface is M, M; the temperature difference before and after the cooling of the sinter is delta T and DEG C; the width V of the single-section flat material surface after the grooves are formed on the sintering material surface is as follows: v=δ/(k1·Δt), (formula I); in the formula I, V is the width of a single-section flat material surface after a groove is formed on the sintering material surface, and m; k1 is an empirical coefficient of the surface stress of the sinter, and is obtained by field test, wherein the value is 3.5-5.5kPa/m ℃;

then, the number n of grooves is: n= { M/V } -1. (formula II); in the formula II, "{ }" is an upward rounding symbol, and represents that the value is the smallest integer which is larger than or equal to the target value;

the distance x between the central axes of adjacent grooves is as follows: x=m/(n+1), (formula III); in the formula III, x is the interval between the central axes of adjacent grooves, and m;

202 In the vertical direction perpendicular to the sintering material surface, adjusting the opening depth of the groove; setting the ignition temperature of the furnace to be T1 and DEG C; the opening depth d of the groove is: d= (k2·t1·m)/n. (formula IV); in the formula IV, d is the opening depth of the groove, and m; k2 is an empirical coefficient of the trench depth, and is obtained by field test and has a value of 1.1X10 ^-5 ～3.0×10 ^-5 a/DEG C; m is the width of the sintering material surface and M; n is the number of grooves;

203 In the width direction of the sintered material surface, the opening number of the grooves is further adjusted by adjusting the distance between the central axes of the adjacent grooves;

204 In the width direction of the sintered charge level, adjusting the opening width of the trench; the trench opening width b is:

(formula V); in the formula (V), b is the opening width of the groove, and m; d is the opening depth of the groove, m and C is the length of the groove edge (15), m;

2. The method according to claim 1, wherein: in the step 2), the cross section of the groove is one or more of V-shaped, semicircular and rectangular.

3. The method according to claim 1, wherein: the grooves are formed in the surface of the sintering material.

4. A method according to claim 3, characterized in that: the arrangement mode of the plurality of grooves is as follows: and a plurality of grooves are distributed at equal intervals in the width direction of the sintering material surface, and the grooves are linear.

5. The method according to claim 1, characterized in that: the opening quantity of the regulating grooves, the opening depth of the regulating grooves and the opening width of the regulating grooves are all regulated by adopting a material surface shaping device; the material surface shaping device comprises a fixed support (11), a semicircular base (12), a connecting ball (13), a pull rod (14) and a groove blade (15); one end of the semicircular base (12) is fixed on the fixed support (11); the other end of the semicircular base (12) is connected with one end of a pull rod (14) through a connecting ball (13); the other end of the pull rod (14) is provided with the groove edge (15).

6. The method according to claim 1, characterized in that: the value of k1 is 4.0-5.5 kPa/mdeg.C.

7. The method according to claim 1, characterized in that: the value of k2 is 1.5X10 ^-5 ～2.5×10 ^-5 /℃。

8. The method according to any one of claims 1-7, wherein: step 202) is specifically: and (3) adjusting the rotation angles of the pull rod (14) in the plane where the axis of the sintered material surface in the length direction is positioned to be theta in the material surface shaping device so that the opening depth of the groove is d, wherein the steps are as follows:

in the formula VI, d is the opening depth of the groove and m; h is the vertical height, m, of the center of the connecting ball (13) from the sintering material surface; l is the length of the pull rod (14), m.

9. The method according to claim 8, wherein: step 204) specifically comprises: and (3) adjusting the self-rotation angle alpha of the groove blade (15) in the material surface shaping device by taking the central axis of the pull rod (14) as a rotation axis to enable the opening width of the groove to be b, wherein:

α=arcsin (b/c.) (formula VII);

in the formula VII, alpha is the self-rotation angle of the groove blade 15 with the central axis of the pull rod 14 as a rotation axis; b is the opening width of the groove, m; c is the length of the slot edge (15), m.

10. The method according to claim 9, wherein: step 203) specifically comprises: all the pull rods (14) are numbered as 1,2, i and n in sequence in the width direction of the sintering material surface; sequentially calculating the rotation angle beta of the pull rod (14) in the plane of the axis of the width direction of the sintering material surface _i Setting beta ₁ The constant value is 0 DEG, i is more than or equal to 1 and less than n; then:

20301 When beta is _i+1 When the ratio of x to (Z-L.sin theta.sin beta) is less than or equal to 90 DEG _i +L·sinθ·sinβ _i+1 ) The method comprises the steps of carrying out a first treatment on the surface of the The following steps are performed: the rotation angle beta of the (i+1) th pull rod (14) in the plane of the axis in the width direction of the sintering material surface in the material surface shaping device is sequentially regulated according to the formula (VIII) _i+1 So that the distance between the two tie rods (14) numbered i and (i+1) is x:

in (formula VIII), beta _i+1 The rotation angle of the (i+1) th pull rod (14) in the plane of the axis in the width direction of the sintering material surface is DEG; x is the distance between the central axes of adjacent grooves, and m; z is the distance between the centers of two adjacent connecting balls (13), m; l is the length of the pull rod (14), m; θ is the rotation angle in the plane of the axis of the pull rod (14) in the length direction of the sintering material surface;

20302 When beta is _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) The length of the pull rod (14) is gradually increased to be L= (L+L) _s ) The method comprises the steps of carrying out a first treatment on the surface of the Then substituting L' into (formula VI) to recalculate to obtain new value of theta, continuing to perform step 20302), and performing iterative calculation until x is less than or equal to (Z-L.sin theta.sin beta) _i +L·sinθ·sinβ _i+1 ) Step 20301) is performed afterwards; wherein L is _s The length value of the pull rod (14) added for each step is 1-100mm;

Alternatively, when beta _i+1 When=90°, if x > (Z-l·sin θ·sin β _i +L·sinθ·sinβ _i+1 ) The current (i+1) th pull rod (14) is withdrawn from the trench pulling operation; then taking the (i+2) th pull rod (14) as the next calculation target of the i th pull rod (14) for calculation; that is, when the original (i+1) th tie rod (14) is withdrawn from the trench pulling operation, the step 20302 is continued after the original (i+2) th tie rod (14) is used as a new (i+1) th tie rod (14), and the iterative calculation is performed in this way until x is less than or equal to (Z-L.sin θ.sin β) _i +L·sinθ·sinβ _i+1 ) Step 20301 is then performed).

11. The method according to claim 10, wherein: l (L) _s The value of (2) is 5-80mm.