CN211471463U - Blast furnace grain slag filtering system - Google Patents

Blast furnace grain slag filtering system Download PDF

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Publication number
CN211471463U
CN211471463U CN201922348212.XU CN201922348212U CN211471463U CN 211471463 U CN211471463 U CN 211471463U CN 201922348212 U CN201922348212 U CN 201922348212U CN 211471463 U CN211471463 U CN 211471463U
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China
Prior art keywords
filtering
blast furnace
filter
filter layer
slag
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CN201922348212.XU
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Inventor
王得刚
段国建
陈秀娟
全强
孟凯彪
郭琼
宿立伟
马铭
樊波
靳征
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MCC Capital Engineering and Research Incorporation Ltd
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MCC Capital Engineering and Research Incorporation Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies

Abstract

The utility model discloses a blast furnace granulating slag filtration system, in the space rectangular coordinate system who uses X, Y, Z axles as the coordinate axis, this blast furnace granulating slag filtration system includes filtering ponds (1), be equipped with modularization filter layer (3) and drainage structures (5) in the bottom of filtering ponds (1), modularization filter layer (3) contain a plurality of filtration module (35), a plurality of filtration module (35) are regular ranks along X axle and Y axle direction and arrange, two adjacent filtration module (35) are connected, filtering ponds (1) contain the bottom plate, drainage structures (5) are for being located wash port or drainage groove in the upper surface of bottom plate. This blast furnace grain slag filtration system contains the modularization filter layer, and the corresponding filtration module of independent quick replacement can appear after the problem that hardens in the filter media among the modularization filter layer, avoids consumeing the manpower and gets into the filter tank and spend the hardened filter media of plenty of time clearance, improves filter effect and maintenance efficiency by a wide margin.

Description

Blast furnace grain slag filtering system
Technical Field
The utility model relates to the field of metal smelting equipment, in particular to a blast furnace granulated slag filtering system.
Background
High-temperature liquid slag (1350-1500 ℃) is generated during blast furnace smelting, about 7 hundred million tons of molten iron are produced in China every year, and about 2.5 million tons of high-temperature liquid slag are generated.
The slag is treated by a precipitation filtration method (commonly called bottom filtration method) water slag process at home and abroad. The method comprises the steps of carrying out hydraulic slag flushing in front of a blast furnace, crushing slag by water quenching to obtain a loose slag-water mixture (often called water slag), enabling water slag to enter a filter tank through a slag flushing channel, filtering liquid water through a filter layer in the filter tank, leaving solid wet slag particles at the bottom of the filter tank, and then grabbing, loading and transporting the slag particles by a bridge type grab crane. The slag particles (with the particle size of 0.2mm-3mm) obtained after water quenching have wide application, can be used as cement materials, heat insulation fillers and the like, and make full use of the slag.
Whether the filter layer can quickly filter the water granulated slag or not is achieved, the separation of liquid water and slag particles is efficiently achieved, and the filter layer is of great importance to the production of the water granulated slag process. The filtering layer is too tight, so that the filtering efficiency is low, the separation of a slag-water mixture cannot be rapidly completed, the slag grabbing condition with water occurs during slag grabbing, and the cyclic utilization of water resources cannot be fully realized; the filter layer is too sparse, so that fine slag particles cannot be isolated, and the fine slag particles and liquid water enter the circulating water system together, so that the pipeline and the valve of the circulating water system are seriously abraded, and the smooth operation of the water granulated slag process is influenced.
The blast furnace slag flushing water contains slag wool with certain components, and the slag wool is easy to block the filtering gap of the filtering layer in the filtering process of realizing slag-water separation, so that the filtering layer is hardened, the hardened filtering layer loses the filtering function, and the production of a water slag system cannot be smoothly carried out.
SUMMERY OF THE UTILITY MODEL
In order to improve the filter effect, the utility model provides a blast furnace grain slag filtration system, this blast furnace grain slag filtration system contain the modularization filter layer, and the corresponding filtration module of independent quick replacement appears in the filter medium among the modularization filter layer after hardening the problem, avoids consumeing the manpower and gets into the filter tank cost plenty of time clearance hardened filter medium, improves filter effect and maintenance efficiency by a wide margin.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a blast furnace granulating slag filtration system, in the space rectangular coordinate system who uses the X, Y, Z axle as the coordinate axis, this blast furnace granulating slag filtration system includes the filtering ponds, be equipped with modularization filter layer and drainage structures in the bottom of filtering ponds, the modularization filter layer is located drainage structures's top, the modularization filter layer contains a plurality of filter module, a plurality of filter module are regular ranks along X axle and Y axle direction and arrange, two adjacent filter module connect, the filtering ponds contain the bottom plate, drainage structures is for being located wash port or drainage groove in the upper surface of bottom plate.
Be equipped with grid apron in drainage structures's the upper end, be equipped with a plurality of drainage structures in the bottom of filtering ponds, be equipped with the boss between two adjacent drainage structures.
The modularization filter layer with the boss butt, the modularization filter layer is parallel with the grid apron, has the interval of setting for between grid apron and the modularization filter layer.
The grid cover plate comprises first grid strips and second grid strips, the first grid strips and the second grid strips are connected to form a grid-shaped structure, the first grid strips are parallel to an X axis, and the second grid strips are parallel to a Y axis.
The filtering module comprises a filtering box body and a filtering medium, the filtering medium is positioned in the filtering box body, the filtering box body comprises a bottom grating plate and four side grating plates, and the upper end of the filtering box body is in an open state.
The filter medium comprises a plurality of filter layers which are stacked along the Z-axis direction, each filter layer contains a granular filter body, and the upper end surface of the filter box body is flush with the upper surface of the filter medium.
Along from the direction of making progress down, the diameter of filtering the body in the filtration layering diminishes gradually, the superiors filter the body in the filtration layering for the slag grain or the quartz sand that the diameter is the same with the slag grain after the blast furnace slag granulation.
The thickness of the filtration layer gradually decreases in the direction from the bottom to the top.
Still be equipped with filter layer protection architecture in the filter tank, filter layer protection architecture and modularization filter layer range upon range of from top to bottom are connected.
The filter layer protection structure comprises a first steel beam and a second steel beam, the first steel beam is connected with the second steel beam to form a lattice-shaped structure, the first steel beam is parallel to an X axis, the second steel beam is parallel to a Y axis, the distance between every two adjacent first steel beams is smaller than the size of a grab bucket of the grab bucket crane, and the distance between every two adjacent second steel beams is smaller than the size of the grab bucket crane.
The utility model has the advantages that:
1. the filtering box body formed by the grating plates can effectively support the filtering medium without influencing the filtering speed.
2. The filtering medium in the filtering box body forms a gradient configuration with the diameter gradually reduced from bottom to top, the stability of the filtering medium is good, the small-diameter filtering medium on the upper layer cannot be taken away by filtered water, and the efficient operation of the filtering system is fully ensured.
3. The filter module of cuboid shape is covered with the filtering ponds bottom, and the corresponding filter module of independent quick replacement can appear after the hardened problem in the filter media, avoids consumeing the manpower and gets into the filtering ponds and spend the hardened filter media of plenty of time clearance, improves maintenance efficiency by a wide margin.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Figure 1 is a cross-sectional view of the blast furnace granulated slag filtration system of the present invention.
Fig. 2 is a perspective view of the blast furnace granulated slag filtering system of the present invention.
Fig. 3 is a schematic view of a grille cover plate.
FIG. 4 is a schematic view of a modular filter layer.
Fig. 5 is a cross-sectional view of a filtration module.
Fig. 6 is a schematic view of a filter housing.
Fig. 7 is a schematic view of a filter layer protective structure.
1. A filtration tank; 2. a filter layer protection structure; 3. a modular filter layer; 4. a grid cover plate; 5. a drainage structure;
21. a first steel beam; 22. a second steel beam;
31. a side grid plate; 32. a bottom grid plate; 33. cobblestones; 34. slag particles; 35. a filtration module;
41. a first grid bar; 42. a second grid bar; 43. the grid plate is provided with through holes.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A blast furnace granulated slag filtering system is characterized in that in a space rectangular coordinate system taking an X, Y, Z axis as a coordinate axis, the blast furnace granulated slag filtering system comprises a filtering tank 1, a modular filtering layer 3 and a drainage structure 5 are arranged in the bottom of the filtering tank 1, the modular filtering layer 3 is located above the drainage structure 5, the modular filtering layer 3 is of a rectangular plate-shaped structure, the modular filtering layer 3 is parallel to a plane where an X axis and a Y axis are located, the modular filtering layer 3 comprises a plurality of filtering modules 35, the filtering modules 35 are arranged in regular rows and columns along the X axis and the Y axis, two adjacent filtering modules 35 are connected in a seamless mode, the filtering tank 1 comprises a bottom plate and a side wall, and the drainage structure 5 is a drainage hole or a drainage groove located in the upper surface of the bottom plate, as shown in fig. 1 and fig. 2.
In this embodiment, the bottom plate and the side walls of the filtering tank 1 enclose a cubic filtering space, the bottom plate and the side walls enclose a steel frame concrete structure, and the drainage structure 5 is a drainage hole or a drainage groove prefabricated in the upper surface of the bottom plate. For example, the drainage structure 5 is a drainage groove, an opening of the drainage groove faces upward, a drainage port communicating with the drainage groove is provided on a side wall of the filtration tank 1, the drainage groove is opened along the X-axis direction, and a plurality of drainage grooves are arranged at intervals along the Y-axis direction, as shown in fig. 1 and 2.
In the embodiment, the upper end of the drainage structure 5 is provided with a grating cover plate 4, namely, the grating cover plate 4 is covered above the drainage groove, and the function of the grating cover plate 4 is basically the same as that of the well grate. The bottom of the filter tank 1 is internally provided with a plurality of drainage grooves, a boss is arranged between every two adjacent drainage grooves and is in a long strip shape, and the boss is parallel to the drainage grooves.
In this embodiment, modularization filter layer 3 with the boss butt, the weight of modularization filter layer 3 by the boss bears to avoid modularization filter layer 3 and filtering ponds 1's bottom plate direct contact, improve filtration efficiency. The modularized filter layer 3 is matched with the filter tank 1, the grid cover plate 4 is matched with the drainage groove, the modularized filter layer 3 is parallel to the grid cover plate 4, and a set distance (namely the height of the boss) exists between the grid cover plate 4 and the modularized filter layer 3, as shown in fig. 1.
Specifically, the structure of the grid cover plate 4 is substantially the same as that of the well grate, the grid cover plate 4 comprises a first grid bar 41 and a second grid bar 42, the first grid bar 41 and the second grid bar 42 are connected to form a grid-shaped structure, the grid cover plate 4 comprises grid plate through holes 43, the first grid bar 41 is parallel to the X axis, and the second grid bar 42 is parallel to the Y axis, as shown in fig. 3. The grating cover plate 4 is made of stainless steel or other corrosion-resistant materials, and can also be made of ordinary steel plates through brushing anti-rust paint. The filtered water of the grating cover plate 4 is finally discharged out of the filter tank 1 through the drainage structure 5.
In the present embodiment, the distance between two adjacent filter modules 35 is zero, the filter modules 35 are all distributed over the entire modular filter layer 3, each filter module 35 has the same size and structure, the filter modules 35 have a substantially rectangular plate-like structure, and each filter module 35 includes a filter box body filled with the filter medium, the filter box body includes a bottom grid plate 32 and four side grid plates 31, and an upper end of the filter box body is in an open state, as shown in fig. 4 to 6. The bottom grating plate 32 and the side grating plate 31 are formed by cutting grating plates, and the bottom grating plate 32 and the side grating plate 31 can be made of stainless steel plates or other corrosion-resistant materials, or can be made of ordinary steel plates by brushing anti-rust paint.
In this embodiment, the filter medium includes a plurality of filter layers stacked in the Z-axis direction, each filter layer includes a granular filter, and an upper end surface of the filter box is flush with an upper surface of the filter medium. The uppermost filter body in the filter layers is slag particles 34 after blast furnace slag granulation, and the rest filter bodies in the filter layers are cobblestones 33.
Namely, the filter bodies in the top filtering layer of the plurality of filtering layers are slag particles 34 after blast furnace slag granulation, and the filter bodies in the rest filtering layers of the plurality of filtering layers are cobblestones 33. The filter body in the top filtration layer may also be quartz sand or other filter medium having a diameter close to the diameter of the slag particles 34.
In this embodiment, the diameters of the filter bodies in the filter layers gradually decrease along the direction from bottom to top, and the diameters of the filter bodies in the same filter layer are uniform. The thickness of the filtration layer gradually decreases in the direction from bottom to top, as shown in fig. 5.
In this embodiment, a filter layer protection structure 2 is further disposed in the filtration tank 1, and the filter layer protection structure 2 is connected with the modular filter layer 3 in an up-down stacked manner. The filter layer protection structure 2 comprises a first steel beam 21 and a second steel beam 22, the first steel beam 21 and the second steel beam 22 are connected to form a lattice-shaped structure, the first steel beam 21 is parallel to an X axis, the second steel beam 22 is parallel to a Y axis, the distance between every two adjacent first steel beams 21 is smaller than the size of a grab bucket of the grab bucket crane, and the distance between every two adjacent second steel beams 22 is smaller than the size of the grab bucket crane. In order to avoid the damage of the filter layer by the grab crane during the slag grabbing process, as shown in fig. 7.
The utility model discloses in, follow from the orientation of making progress down, the diameter of filtering the intraformational filter body of filtration diminishes gradually, and filter medium stability is good, and the minor diameter filter medium on upper strata can not taken away by the drainage, fully guarantees filtration system's high-efficient operation. The filter box that the grid board is constituteed can effectively support filter medium under the prerequisite that does not influence filter speed, and the filter module of cuboid shape is covered with the filtering ponds space, and the independent quick replacement of being convenient for after the problem that hardens appears in the filter medium improves maintenance efficiency by a wide margin.
For easy understanding and description, the present invention adopts the absolute position relation and the space rectangular coordinate system to combine together to express, wherein the Z-axis direction in the space rectangular coordinate system is corresponding to the up-down direction, and the plane where the X-axis and the Y-axis are located in the space rectangular coordinate system is corresponding to the horizontal plane. The present invention has been described with reference to the viewing angle of the user, but the above words cannot be understood or interpreted as limitations to the scope of the present invention.
The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent. In addition, the utility model provides an between technical feature and the technical feature, between technical feature and technical scheme, technical scheme and the technical scheme all can the independent assortment use.

Claims (10)

1. The utility model provides a blast furnace granulating slag filtration system, characterized in that, in the space rectangular coordinate system who uses the X, Y, Z axle as the coordinate axis, this blast furnace granulating slag filtration system includes filtering ponds (1), be equipped with modularization filter layer (3) and drainage structures (5) in the bottom of filtering ponds (1), modularization filter layer (3) are located the top of drainage structures (5), modularization filter layer (3) contain a plurality of filter module (35), a plurality of filter module (35) are regular ranks along X axle and Y axle direction and arrange, two adjacent filter module (35) are connected, filtering ponds (1) contain the bottom plate, drainage structures (5) are for being located wash port or drainage groove in the upper surface of bottom plate.
2. The blast furnace granulated slag filtering system according to claim 1, wherein a grid cover plate (4) is arranged in the upper end of the drainage structure (5), a plurality of drainage structures (5) are arranged in the bottom of the filtering tank (1), and a boss is arranged between every two adjacent drainage structures (5).
3. The blast furnace granulated slag filtering system according to claim 2, wherein the modular filter layer (3) abuts against the boss, the modular filter layer (3) is parallel to the grate cover plate (4), and a set distance exists between the grate cover plate (4) and the modular filter layer (3).
4. The blast furnace granulated slag filtering system according to claim 2, wherein the grate cover plate (4) comprises a first grate bar (41) and a second grate bar (42), the first grate bar (41) and the second grate bar (42) are connected to form a lattice-like structure, the first grate bar (41) is parallel to the X-axis, and the second grate bar (42) is parallel to the Y-axis.
5. The blast furnace granulated slag filtering system according to claim 1, wherein the filtering module (35) comprises a filtering case and a filtering medium, the filtering medium is positioned in the filtering case, the filtering case comprises a bottom grid plate (32) and four side grid plates (31), and the upper end of the filtering case is in an open state.
6. The blast furnace granulated slag filtering system according to claim 5, wherein the filtering medium comprises a plurality of filtering layers which are stacked in the Z-axis direction, each filtering layer comprises a granular filtering body, and the upper end surface of the filtering box body is flush with the upper surface of the filtering medium.
7. The blast furnace granulated slag filtering system according to claim 6, wherein the diameter of the filter body in the filter layer gradually decreases from bottom to top, and the filter body in the uppermost filter layer is granulated blast furnace slag (34) or quartz sand having the same diameter as the slag (34).
8. The blast furnace granulated slag filtering system according to claim 1, wherein the thickness of the filtering layer is gradually decreased in a direction from bottom to top.
9. The blast furnace granulated slag filtering system according to claim 1, wherein a filtering layer protecting structure (2) is further arranged in the filtering tank (1), and the filtering layer protecting structure (2) is connected with the modular filtering layer (3) in an up-and-down stacked manner.
10. The blast furnace granulated slag filtering system according to claim 9, wherein the filter layer protecting structure (2) comprises first steel beams (21) and second steel beams (22), the first steel beams (21) and the second steel beams (22) are connected to form a lattice-like structure, the first steel beams (21) are parallel to the X-axis, the second steel beams (22) are parallel to the Y-axis, the distance between two adjacent first steel beams (21) is smaller than the size of the grab bucket of the grab crane, and the distance between two adjacent second steel beams (22) is smaller than the size of the grab bucket of the grab crane.
CN201922348212.XU 2019-12-24 2019-12-24 Blast furnace grain slag filtering system Active CN211471463U (en)

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Application Number Priority Date Filing Date Title
CN201922348212.XU CN211471463U (en) 2019-12-24 2019-12-24 Blast furnace grain slag filtering system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922348212.XU CN211471463U (en) 2019-12-24 2019-12-24 Blast furnace grain slag filtering system

Publications (1)

Publication Number Publication Date
CN211471463U true CN211471463U (en) 2020-09-11

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