Molten iron chute of blast furnace pig casting machine
By designing the structure of vortex, groove and diversion groove in the cast iron chute, and setting up the diversion table and arc-shaped wall surface, the problems of uneven flow of molten iron and easy burn through the iron mouth are solved, and uniform diversion and stability of molten iron are achieved Cooling extends the life of the equipment.
Patent Information
- Application Number
- CN202420074628.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-01-12
AI Technical Summary
The existing cast iron chute structure design of the cast iron machine is unreasonable, resulting in uneven flow of the iron and uneven cooling. The iron bonds severely on the inner wall of the flow trough, and the iron chute is easily burned through, affecting production continuity.
A structure including a vortex, a groove and a shunt are designed. The groove end of the groove is connected to the left side of the shunt, and a shunt table is arranged on the right side wall of the shunt, and the left side wall of the shunt table is spherical arc-shaped. Or an ellipsoidal arc shape, the bottom of the groove groove is R250mm arc, the bottom of the groove gradually becomes deeper and inclined, and the right end of the shunt groove narrows inward, forming a arc diversion port to reduce the impact force of molten iron.
It effectively reduces the impact force of molten iron on the diversion tank, realizes uniform diversion and buffering of molten iron, reduces the bonding and adhesion of molten iron after condensation, improves flow stability, and extends the service life of the equipment.
Smart Images
Figure CN222221083U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steel smelting, in particular to a molten iron chute for a blast furnace iron casting machine, which is a molten iron diversion device used in the iron casting process of the steel industry. Background Art
[0002] The cast iron machine is one of the important equipment in the ironmaking plant's production line. The cast iron process is that the tilting mechanism tilts the molten iron tank, and the molten iron flows into the cast iron machine mold through the vortex and grooves. The cast iron machine drives the cast iron mold to the cooling area and sprays water on the surface of the cast iron mold to accelerate the cooling and solidification of the newly crusted iron block before demolding the iron block.
[0003] The existing cast iron molten iron chute structure design is unreasonable; first, the vortex trough structure is asymmetric, and the cooling is uneven locally, which leads to the adhesion of molten iron on the inner wall of the chute, and the amount of iron adhesion is large, resulting in very large iron loss; second, the molten iron has a large flow rate through the groove, and it has a large impact force when flowing to the chute tail iron spout (diversion chute body), and the chute bottom of the iron spout is easy to burn through, which seriously affects the production continuity. Therefore, it is urgent to design a new structural chute. Utility Model Content
[0004] The invention object of the utility model is to provide a molten iron chute of a blast furnace cast iron machine in view of the above problems, which can effectively reduce the impact of molten iron on the diversion chute body.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:
[0006] A molten iron chute of a blast furnace cast iron machine comprises a vortex, a groove and a diversion chute, wherein the vortex, the groove and the diversion chute are connected and arranged in sequence, and the groove tail of the groove is connected to the left side of the diversion chute; the diversion platform is also included, and the diversion platform is arranged on the right side wall of the diversion chute, and the diversion platform is directly opposite to the groove tail of the groove.
[0007] Among them, the right wall of the diverter table is close to the right wall of the diverter trough, and the left wall of the diverter table is a spherical arc or ellipsoidal arc slope structure, which gradually thickens from the surroundings to the bottom center and has a high fixed strength, so that the molten iron impacts the diverter table and flows to the diversion ports on both sides.
[0008] The groove bottom cross section is an R250mm arc. The groove gradually deepens from the groove head to the groove tail, and the groove bottom is inclined downward from the groove head to the groove tail, and the inclination angle of the groove bottom is 1.5°-3°, such as 2° or 2.5°, forming a narrow and deep groove structure.
[0009] The groove body of the groove is arranged with steel plate layer, clay brick and castable layer in sequence from bottom to top, and the outer end edge of the diversion port of the clay brick and castable layer is contracted inward by a certain distance, such as 5 cm, relative to the outer end edge of the diversion port of the steel layer.
[0010] As mentioned above, the tail of the groove is connected to the left side of the diversion groove, and a diversion platform is set on the right side wall of the diversion groove, and the diversion platform is directly opposite to the tail of the groove. After the molten iron hits the diversion platform, it flows to the diversion ports on both sides, achieving the purpose of buffering the impact of the molten iron.
[0011] Based on the above scheme, in an improved scheme, the inner wall surface of the vortex groove is a hemispherical structure, which forms a vortex when receiving the molten iron, so that the temperature uniformity is optimal.
[0012] Based on the above scheme, in an improved scheme, the right side end of the diverter trough is narrowed inward relative to the left side end, and its surrounding edges are in the shape of an isosceles trapezoid when viewed from above. Specifically, the diverter trough forms two diverter ports at its front and rear ends, and the outer edge of the diverter port gradually tilts and shrinks inward from the left side end of the diverter trough to the right side end, and the inclination angle of the inward contraction of the outer edge of the diverter port is 5°-15°. For example, the inward contraction angle of the outer edge of the diverter port is 9.5°, 10° or 11°, etc. The diverter port is close to the diverter table. After the molten iron impacts the diverter table, an arc diverting flow direction is formed, and the flow velocity on the right side is faster. The narrowing of the right side allows the molten iron to be thrown at a closer distance, the diversion is smoother, and the distance between the throwing points is more balanced.
[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:
[0014] The utility model discloses a molten iron chute of a blast furnace cast iron machine, wherein the tail of the groove is connected to the left side of a diversion groove, a diversion platform is arranged on the right side wall of the diversion groove, and the diversion platform is directly opposite to the tail of the groove, and the molten iron flows to the diversion ports on both sides after impacting the diversion platform, so as to achieve the purpose of buffering the impact of the molten iron and facilitate more uniform diversion and casting of the molten iron. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the chute body structure of the utility model.
[0016] Figure 2 yes Figure 1 Schematic diagram of the internal structure.
[0017] Figure 3 It is a schematic diagram of the structure of the groove body and the diversion groove body of the utility model.
[0018] Figure 4 yes Figure 3 Schematic diagram of the internal structure.
[0019] Figure 5 yes Figure 3 A partial top view of .
[0020] In the accompanying drawings, 1. chute body, 2. groove body, 3. diversion trough body, 4. diversion platform, 5.,. DETAILED DESCRIPTION
[0021] Example 1
[0022] See also Figure 1-Figure 5 A molten iron chute of a blast furnace cast iron machine in this embodiment includes a vortex groove 13, a groove and a diversion groove. The vortex groove 13, the groove and the diversion groove are connected and arranged in sequence, and the groove tail of the groove is connected to the left side of the diversion groove; it also includes a diversion platform, which is arranged on the right side wall of the diversion groove, and the diversion platform is directly opposite to the groove tail of the groove.
[0023] The vortex 13 and the water outlet 14 are arranged on the vortex body, and the clay brick layer 11 and the main iron groove casting material layer are arranged from bottom to top. The groove body 2 is arranged on the surface of the groove, and the steel plate layer 21, the clay brick layer 22 and the casting material layer 23 are arranged in sequence from bottom to top; similarly, the diversion groove is arranged on the surface of the diversion groove body 3.
[0024] The diverter platform 4 is formed by a protrusion on the cast material layer of the diverter tank body 3. The right wall of the diverter platform 4 is close to the right wall of the diverter tank, and the left wall of the diverter platform 4 is a spherical arc or ellipsoidal arc slope structure, which gradually becomes thicker from the surrounding to the bottom center, and has a high fixing strength, so that the molten iron flows to the diverter ports on both sides after impacting the diverter platform.
[0025] In this way, the tail of the groove is connected to the left side of the diversion groove, and a diversion platform is set on the right side wall of the diversion groove, and the diversion platform is directly opposite to the tail of the groove. After the molten iron hits the diversion platform, it flows to the diversion ports on both sides, thereby achieving the purpose of buffering the impact of the molten iron and facilitating more uniform diversion and pouring of the molten iron.
[0026] Example 2
[0027] On the basis of Example 1, this embodiment has a vortex groove vortex structure, which is as follows:
[0028] See also Figure 1 and Figure 2 The inner wall of the vortex groove is a hemispherical structure, which forms a vortex when receiving the molten iron, so that the temperature uniformity reaches the best effect.
[0029] Example 3
[0030] On the basis of Example 1 or Example 2, this embodiment has a flow diversion and drainage structure, which is as follows:
[0031] See also Figure 3-Figure 5 The right end of the diversion trough is narrowed inwardly relative to the left end, and its surrounding edges are in the shape of an isosceles trapezoid when viewed from above.
[0032] Specifically, the diverter groove forms two diverter openings at its front and rear ends, and the outer edges of the diverter openings gradually incline and shrink inward from the left end to the right end of the diverter groove, and the inward contraction angle of the outer edges of the diverter openings is 5°-15°. For example, the inward contraction angle of the outer edges of the diverter openings is 9.5°, 10° or 11°.
[0033] In this way, the diversion port is closer to the diversion table. After the molten iron hits the diversion table, an arc diversion is formed to change the flow direction, and the flow rate on the right side is faster. The narrowing of the right side allows the molten iron to be thrown at a closer distance, and the diversion is smoother. The distance between the throwing points relative to the end of the groove and the center line of the diversion table is more balanced, avoiding overly protruding landing points on the left and right sides of the diversion port.
[0034] Example 4
[0035] This embodiment 4 will be further described in detail by taking the combined features of embodiment 2 and embodiment 3 as an example.
[0036] See also Figure 1-Figure 5 The present application provides a cast iron molten iron chute structure with three protective layers (steel plate layer, clay brick layer and castable layer) to reduce the cross-sectional area of molten iron passing through the chute, reduce iron formation, molten iron splashing and molten iron impact. The figure shows some dimensional parameters, and the length dimensional parameter unit is mm.
[0037] The design is based on the original steel plate frame, changing the vortex groove structure and cross-sectional area, so that the vortex groove forms a vortex when receiving molten iron. The inclination angle of the molten iron passing through the iron chute (groove) is adjusted to make the flow rate of the molten iron stable, greatly reducing the impact force of the molten iron.
[0038] The vortex trough is designed with a hemispherical structure based on the original vortex trough frame. When receiving molten iron, a vortex is formed to eliminate the splashing loss of molten iron due to local temperature unevenness.
[0039] Based on the original groove framework, the groove is designed to be a deep and narrow structure. The cross-sectional area of the molten iron passing through the groove is reduced (bottom arc R250mm) through the iron flow data, thereby reducing the heat loss of the molten iron and improving fluidity.
[0040] The iron-water diversion trough is designed with a buffer diversion platform to achieve uniform casting and reduce impact, thus avoiding molten iron overflow.
[0041] The chute solution is implemented without changing the main production structure and the original production process; it can not only ensure the integrity of the original production system, but also ensure the safe and reliable operation of the equipment. The chute solution is completely matched with the production environment, has all the functions of the production line, and meets the production conditions without changing the original design of the production line.
[0042] The vortex trough is designed as a hemispherical structure, which forms a vortex during the pouring process of the molten iron in the molten iron tank to achieve the best use effect. The inclination angle of the chute groove is adjusted to 1.5°-3°. During casting, the molten iron flow is buffered and diverted through the diversion platform baffle to achieve uniform casting and reduce impact. The molten iron diversion achieves uniform casting.
[0043] Through the structural transformation of the chute, the adaptability of the chute to the harsh environment of high-temperature iron flow is achieved, providing stable conditions for cast iron cooling. The rounded corner and arc surface design reduces the erosion of the lining by the molten iron, improves the stability of the molten iron flow, and reduces the adhesion and adhesion of the molten iron to the inner wall of the chute after condensation. The structure is simple, safe and reliable, and the operation effect is good.
[0044] It should be pointed out that the examples of the above-mentioned embodiments can be preferably combined with one or more of them according to actual needs, and multiple examples use a set of drawings to illustrate the combined technical features, which will not be described one by one here.
[0045] It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.
[0046] The above description is a detailed description and illustration of the preferred feasible embodiments of the utility model, but these descriptions are not intended to limit the scope of protection required by the utility model. All equivalent changes or modified changes completed under the technical teachings suggested by the utility model should fall within the scope of patent protection covered by the utility model.
Claims
1. A molten iron chute of a blast furnace cast iron machine, comprising a vortex groove, a groove and a diversion groove, wherein the vortex groove, the groove and the diversion groove are connected and arranged in sequence, and the groove tail of the groove is connected to the left side of the diversion groove; characterized in that: It also includes a diverter platform, which is arranged on the right side wall of the diverter slot, and the diverter platform is located directly opposite to the slot tail of the groove.
2. The molten iron chute of a blast furnace iron casting machine according to claim 1, characterized in that: The right side wall of the diverter platform is in close contact with the right side wall of the diverter slot, and the left side wall of the diverter platform is in a spherical arc shape or an ellipsoidal arc shape structure.
3. The molten iron chute of a blast furnace iron casting machine according to claim 1, characterized in that: The inner wall surface of the vortex groove is in a hemispherical structure.
4. The molten iron chute of a blast furnace iron casting machine according to claim 1, characterized in that: The groove bottom cross-section of the groove is an R250mm arc.
5. The molten iron chute of a blast furnace iron casting machine according to claim 1, characterized in that: The bottom of the groove is inclined downward from the groove head to the groove tail, and the inclination angle of the groove bottom is 1.5°-3°.
6. The molten iron chute of a blast furnace iron casting machine according to claim 1, characterized in that: The right side end of the diverter slot is narrowed inwardly relative to the left side end, and the peripheral edges thereof are in the shape of an isosceles trapezoid when viewed from above.
7. The molten iron chute of a blast furnace iron casting machine according to claim 6, characterized in that: The diverter groove forms two diverter openings at its front and rear ends, and the outer edges of the diverter openings gradually incline and shrink inward from the left end to the right end of the diverter groove, and the inward inclination angle of the outer edges of the diverter openings is 5°-15°.
8. The molten iron chute of a blast furnace iron casting machine according to claim 7, characterized in that: The inwardly contracting inclination angle of the outer end edge of the diversion port is 9.5°.
9. The molten iron chute of a blast furnace iron casting machine according to claim 7, characterized in that: The groove body of the groove is sequentially arranged with a steel plate layer, a clay brick and a castable layer from bottom to top, and the outer end edges of the diversion openings of the clay brick and the castable layer are contracted inward by a certain distance relative to the outer end edges of the diversion openings of the steel layer.