WO2017088595A1

WO2017088595A1 - Secondary material distribution system

Info

Publication number: WO2017088595A1
Application number: PCT/CN2016/101616
Authority: WO
Inventors: 戴文军; 马云峰; 郑军; 王蜀生; 王永猛; 张波
Original assignee: 中冶赛迪工程技术股份有限公司
Priority date: 2015-11-26
Filing date: 2016-10-10
Publication date: 2017-06-01
Also published as: CN105603139A; CN105603139B

Abstract

A secondary material distribution system comprises a valve container (1) and a bellows pipe (2) disposed therebelow. The valve container (1) comprises two or more material inlets (101) disposed at a top of the valve container (1), and a material outlet (102) disposed at a bottom of the valve container (1). The secondary material distribution system further comprises a secondary distribution device (5) disposed between the valve container (1) and the bellows pipe (2) or integrated in the bellows pipe (2), and has a structure comprising a housing (51) and a collecting funnel (52) fixed and attached to the inside of the housing (51) via a positioning and connecting component (53). The collecting funnel (52) is disposed directly below the outlet port (102), and a gap is provided between the collecting funnel (52) and an inner wall of the housing (51). The secondary material distribution system effectively prevents material segregation, and reduces the impact of materials on a bellows pipe throat (201) and a material distributing device throat (301), extending a service life thereof, increasing production efficiency of a blast furnace, and being widely applicable to a blast furnace bell-less top feeding system and other vertical wall material feeding systems.

Description

Material secondary distribution system

Technical field

The invention belongs to the technical field of metallurgical smelting equipment, and relates to a shaft type furnace top technology, in particular to a material secondary distribution system of a blast furnace bellless top charging system.

Background technique

The blast furnace bell-less top charging system is used by most blast furnaces in the world, but in the existing blast furnace or multi-tank bell-less charging system, after the material enters the valve box from the tank, the material deviates from the blast furnace center. The S-shaped flow trajectory is presented during the blanking process, and finally deviates from the center of the blast furnace at the outlet of the distributor pipe to cause segregation of the material, as shown in Fig. 1.

The above segregation has the following disadvantages: on the one hand, in the flow process of the S-shaped curve, the material will cause segregation of the material, so that the material will be unevenly distributed after the material is discharged into the furnace through the distributor chute, and the cloth ring tends to be elliptical, which seriously affects the blast furnace. Production efficiency; Secondly, during the flow of the S-shaped curve, the material continuously impacts the bellows pipe and the distributor pipe, causing severe wear of the pipe and affecting the service life of the equipment.

Summary of the invention

In view of the above, the object of the present invention is to provide a material secondary distribution system, which can vertically cut the material along the center line of the blanking, effectively prevent the occurrence of material segregation and reduce the material to the bellows and the pipe. The impact of the distributor hose delays its service life and improves the efficiency of the blast furnace.

In order to achieve the above object, the present invention is achieved by the following technical solutions:

The invention provides a material secondary distribution system, comprising a valve box and a bellows disposed under the valve box, the valve box has at least two inlets at the top, a discharge port at the bottom thereof, and two a secondary dispensing device disposed between the valve box and the bellows or integrated into the bellows, configured with a housing and a concentrated funnel fixedly coupled within the housing by a positioning connection assembly, the concentrated funnel being disposed There is a gap directly under the discharge port and between the inner wall of the casing. When the flow passes through the valve box to the concentrated funnel, it falls into the concentrated funnel. After the material is temporarily buffered and mixed, the secondary distribution changes the direction of the blanking, and the material is changed from the oblique material to the vertical material. When the material flow rate is large, the material can be By flowing out of the gap between the outer wall of the concentrating funnel and the casing of the secondary distribution device, no blocking phenomenon occurs.

Preferably, the concentrated funnel is a conical or elliptical or square tapered structure, the large end of the mouth is facing the discharge opening, and the size of the large port portion is larger than the size of the mouth of the discharge port.

Preferably, the large mouth end of the concentrated funnel is symmetrically provided with a set of notches for improving the material discharging ability after the material is buffered by the concentrated funnel.

Preferably, the positioning connection assembly is at least two sets and is evenly arranged along the circumferential direction of the concentrating funnel, including a support plate I disposed on the outer wall of the concentrating funnel, a support plate II disposed on the inner wall of the casing, and a fixed connection Connecting bolts for the support plate I and the support plate II. The installation height of the concentrated funnel can be adjusted by connecting bolts, so that the centralized funnel position is optimal and the material segregation effect is best.

Preferably, the adjusting pad is sleeved on the connecting bolt, and the adjusting pad is a steel ring or a spring pad.

In an embodiment of the material secondary distribution system, a plurality of annular baffles are disposed along the axial direction of the concentrated funnel, and the baffle and the inner wall of the concentrated funnel are coated with a layer on the surface directly contacting the material. Abrasion resistant material. The space formed between the baffle plate and the inner wall of the casing can store a certain amount of material, so that the material hits the stored material during the blanking process, effectively reducing the wear of the concentrated funnel and greatly improving the service life thereof.

In an embodiment of the material secondary distribution system, the inner wall of the concentrated funnel is provided with a detachable wear-resistant lining, and the wear-resistant lining is coated with a layer of wear-resistant material on the surface layer directly contacting the material. .

The invention has the beneficial effects that: by rationally setting the secondary distribution device, the material is vertically distributed after the device is secondly distributed, and the material is vertically discharged along the blanking center, thereby effectively preventing material segregation, improving the production efficiency of the blast furnace, and reducing the material pair. The impact of the bellows pipe and the distributor pipe delays the service life of the equipment and is very suitable for use in shaft furnaces, especially in the blast furnace bellless top loading system.

Other advantages, objects, and features of the invention will be set forth in part in the description which follows, and in the <RTIgt; The teachings of the present invention are taught. The objectives and other advantages of the invention may be realized and obtained by the following description.

DRAWINGS

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail with reference to the accompanying drawings in which:

Figure 1 is a cross-sectional view showing a part of the equipment of the prior blast furnace bellless top charging system;

Figure 2 is a cross-sectional view of the material secondary distribution system apparatus of the present invention;

Figure 3 is a cross-sectional view showing a secondary distribution device according to a first embodiment of the present invention;

Figure 4 is a plan view of Figure 3;

Figure 5 is a cross-sectional view showing a secondary distribution device according to a second embodiment of the present invention;

Figure 6 is a schematic view showing the working principle of the material secondary distribution system of the present invention;

LIST OF REFERENCE NUMERALS 1 - valve box, 101 - inlet port, 102 - discharge port; 2 - bellows, 201 - bellows throat; - 3 distributor, 301 - distributor throat; 4 material; - secondary distribution device, 51-shell, 52-concentrated funnel, 521-notch, 53-positioning connection assembly, 531-support plate I, 532-support plate II, 533-connection bolt; 6-block plate; - wear-resistant lining; 8 - wear-resistant Material; the spline with the front indicates the material blanking line.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Embodiment 1:

As shown in FIG. 2-4, the present invention provides a material secondary distribution system comprising a valve box 1 and a bellows 2 disposed under the valve box 1, the valve box 1 having at least two inlet ports at the top of the valve box 1. 101, a discharge port 102 is provided at the bottom thereof, and further includes a secondary distribution device 5, which is disposed between the valve box 1 and the bellows 2 or integrated in the bellows 2, and is configured with a casing The concentrating funnel 52 is fixedly connected to the housing 51 by a positioning connection assembly 53. The concentrating funnel 52 is disposed directly below the discharge opening 102 and is provided with a gap between the inner wall of the housing 51.

Specifically, the top inlet 101 of the valve box 1 of the present embodiment is provided with two juxtaposed tanks (not shown), and the tank is connected to the inlet 101 of the valve box 1, and the material is connected twice under the valve box 1. The distribution device 5 is connected to the bellows 2 under the secondary distribution device 5, the bellows 2 is connected to the distributor 3, and the interior of the bellows 2 and the distributor 3 are respectively provided with a bellows throat 201 and a distributor throat 301. Of course, in different embodiments, the secondary distribution device can also be integrated in the bellows 2, not only to achieve the above purpose, but also to avoid reducing the rigidity of the blast furnace material bell top charging system, or avoiding the increase of the blast furnace. The overall height of the material bell top loading system. The concentrating funnel 52 has a conical structure and is disposed directly below the discharge port 102 of the valve box 1 and has a large end toward the discharge port 102. The size of the large port portion is larger than the size of the mouth of the discharge port 102. It is convenient for the concentration funnel 52 to sufficiently collect the material 4 falling from the discharge port 102, that is, when the material 4 flows through the valve box 1 to the concentration funnel 52, it falls into the concentration funnel 52, and the material 4 is buffered twice for a short time. The distribution changes the direction of the blanking, from oblique cutting to vertical cutting. At the same time, the shape of the housing 51 is the same as that of the concentrating funnel 52, and the radial dimension thereof is 1.05 to 2 times that of the concentrating funnel 52, so that a certain gap is formed between the concentrating funnel 52 and the inner wall of the housing 51, so that the material is made. When the material flow rate is large, the material 4 can flow out through the gap between the outer wall of the concentrated funnel 52 and the casing 51 of the secondary distribution device 5, and no blocking phenomenon occurs. Of course, in different embodiments, the concentrating funnel 52 may also be an elliptical or square tapered structure, and the effect is the same.

The positioning connection assembly 53 is two sets and is evenly arranged along the circumferential direction of the concentrating funnel 52, and includes a support plate I531 disposed on the outer wall of the concentrating funnel 52, a support plate II532 disposed on the inner wall of the housing 51, and a fixed connection. The support bolts 533 of the support plate I531 and the support plate II532, and the installation height of the concentrated funnel 52 can be adjusted by the connecting bolts 533, so that the position of the concentrated funnel 52 is optimal, and the material segregation effect is best. Of course, in different embodiments, in order to ensure the stability of the concentrating funnel 52, the positioning connection assembly 53 can be arranged in multiple sets, such as three sets of positioning connection assemblies 53 arranged at 120° uniformly in the circumferential direction of the concentrating funnel 52.

Moreover, a plurality of annular baffles 6 are disposed along the axial direction of the concentrating funnel 52, and the number of the baffles 6 can be determined according to the size of the concentrating funnel and its cutting ability, and with the inner wall of the concentrating funnel 52. The angle between the angles is 30-90°, so that a plurality of spaces formed between the plurality of ring baffles 6 and the concentration funnel 52 are used for storing a certain material 4, and when the material is cut, the material 4 is hit. On the stored material, the contact area between the falling material 4 and the inner wall of the concentrated funnel 52 and the baffle plate 6 can be effectively reduced, thereby effectively reducing the wear of the concentrated funnel 52, greatly improving the service life thereof, and greatly Reduce the use of wear liners and reduce manufacturing costs. At the same time, the surface of the baffle plate 6 and the inner wall of the concentrated funnel 52 directly contacting the material 4 is coated with a layer of wear-resistant material 8 by surfacing, and the inner wall of the baffle plate 6 and the concentrated funnel 52 can be further protected. To enhance the wear resistance of the baffle 6.

As a further improvement of the embodiment, the large-mouth end of the concentrating funnel 52 is symmetrically provided with a set of notches 521 for improving the material-cutting ability of the material 4 after the secondary distribution of the buffer mixture by the concentrating funnel 52, that is, when the material 4 is concentrated After the accumulation in the funnel 52 reaches a certain height, the material 4 can be discharged along the set of symmetrically disposed notches 521 to alleviate the feeding ability of the concentrated funnel 2 and reduce the load carrying capacity of the concentrated funnel 52.

As a further improvement of the embodiment, further comprising an adjusting washer (not shown) sleeved on the connecting bolt 533, the adjusting washer is a steel ring, that is, between the supporting plate I and the supporting plate II and the connecting bolt 533 The nut is fixed by the nut, and the nut is provided with the steel ring between the support plate I and the support plate II, which is beneficial to enhance the connection rigidity between the concentrated funnel 52 and the casing 51, thereby enhancing the installation stability of the concentrated funnel 52, thereby Extend its service life. Of course, a spring pad can also be used in different embodiments.

As shown in FIG. 6, the working principle of the material secondary distribution system of the present invention is as follows: in the blast furnace bell-less top charging system of the present invention, when the material passes through the material tank and enters the inlet port of the valve box, From the bottom discharge port, the material directly impacts on the secondary distribution device, and then the material is temporarily buffered by the secondary distribution device to form a secondary distribution of the material, changing the direction of the blanking, and changing from oblique cutting to vertical The material is cut off, effectively preventing material segregation. When the material flow rate is large, the material can flow out through the gap between the concentrated funnel and the outer wall of the concentrated funnel and the casing of the secondary distribution device, and no blockage phenomenon occurs, and the material is guaranteed. Smooth. Wherein, when the material is initially cut, the material gradually fills the space formed between the baffle plate and the concentrated funnel, and when the material is subsequently loaded, the material is hit on the previously stored material, thereby effectively reducing the wear of the concentrated funnel and greatly improving Its service life. In addition, according to the actual working conditions, by adjusting the connecting bolts of the positioning and connecting components, the installation height of the concentrated funnel can be adjusted to achieve the optimal installation position, so that the anti-material segregation effect is the best.

Embodiment 2:

As shown in FIG. 5, the difference between the embodiment and the first embodiment is that the inner wall of the concentrating funnel 52 is provided with a detachable wear-resistant lining plate 7, which can be quickly replaced when the wear-resistant lining plate 7 is damaged. At the same time, the material 4 can be stored in the concentrated funnel, which is beneficial to reduce the load of the secondary dispensing device. In addition, the wear liner 7 is in direct contact with the material 4 A layer of wear-resistant material 8 is applied on the layer by surfacing, and the wear-resistant liner 7 can be further protected to enhance the wear resistance of the wear-resistant liner 7.

By rationally setting the secondary distribution device, the material is vertically distributed along the blanking center after being secondly distributed by the device, effectively preventing material segregation, improving blast furnace production efficiency, and reducing material to bellows throat pipe and cloth. The impact of the hose delays the life of the equipment and is ideal for use in shaft furnaces, especially in blast furnace bellless top loading systems.

The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art Modifications or equivalents are intended to be included within the scope of the appended claims.

Claims

A material secondary distribution system comprises a valve box and a bellows disposed under the valve box, wherein the top of the valve box is provided with at least two inlets, and a discharge port is arranged at the bottom thereof, and is characterized in that: a secondary distribution device disposed between the valve box and the bellows or integrated in the bellows, configured with a housing and a concentrated funnel fixedly connected in the housing by a positioning connection assembly, the concentrated funnel A gap is provided directly below the discharge port and between the inner wall of the housing.
The material secondary distribution system according to claim 1, wherein the concentrated funnel has a conical or elliptical or square tapered structure, the large end of the mouth facing the discharge opening, and the large port portion is larger than the outlet. Feed mouth size.
The material secondary distribution system according to claim 1, wherein the large-mouth end of the concentrated funnel is symmetrically provided with a set of notches.
The material secondary distribution system according to claim 1, wherein a plurality of ring baffles are arranged along the axial direction of the concentrating funnel, and the baffle plate and the inner wall of the concentrating funnel are in direct contact with the material. Painted with a layer of wear resistant material.
The material secondary distribution system according to claim 1, wherein the inner wall of the concentrated funnel is provided with a detachable wear-resistant lining, and the wear-resistant lining is coated with a surface directly contacting the material. Layer wear resistant material.
The material secondary distribution system according to claim 1, wherein the positioning connection assembly is at least two sets and is evenly arranged along the circumferential direction of the concentrated funnel, and comprises a support plate I disposed on the outer wall of the concentrated funnel. A support plate II on the inner wall of the casing and a connecting bolt for fixing the support plate I and the support plate II.
The material secondary distribution system according to claim 6, further comprising an adjusting gasket sleeved on the connecting bolt, wherein the adjusting gasket is a steel ring or a spring washer.