Efficient and energy-saving steel slag treatment equipment and treatment method

Abstract

The invention provides efficient and energy-saving steel slag treatment equipment and a treatment method. The steel slag treatment equipment comprises a sealing cover, a slag pot tipping machine, a curing pool and a rake type granulating machine, the sealing cover is arranged at the upper part of the curing tank and forms a closed system with the curing tank; a granulating rake of the rake type granulating machine and a first support form a moving pair through a second support, the granulating rake has a horizontal translation freedom degree in the direction from a front retaining wall to a rear retaining wall of the curing pool, and the trolley has a horizontal translation freedom degree perpendicular to the translation direction of the granulating rake; and the slag ladle tipping machine is positioned at the tipping machine channel at the rear part of the rear retaining wall, and has a horizontal translation degree of freedom in the same direction as the trolley. According to the embodiment of the invention, one slag ladle tipping machine can correspond to a plurality of curing beds, one rake-type granulating machine can process steel slag on a plurality of curing bed stations, and when the rake-type granulating machine crushes the tank shell slag, the pressure of the tip parts of the rake teeth is vertical and does not act on the tank shell slag in a force-free arm offset manner, so that the crushing efficiency is high, and the crushing efficiency is high. And the steel slag treatment process flow and equipment are greatly simplified.

Description

Technical Field

[0001] The invention relates to the technical field of molten high-temperature slag treatment in the metallurgical industry, and in particular to a highly efficient and energy-saving slag treatment device and a treatment method. Background Art

[0002] The existing slag solidification processes mainly include the traditional pool-type hot stuffing process and mechanical granulation (roller granulation). The traditional hot stuffing process uses engineering machinery (excavator) to achieve discrete solidification of molten steel slag, while the mechanical granulation process uses roller equipment to achieve discrete solidification of molten steel slag. The pool-type hot stuffing process is more suitable for steel slag, but its environmental protection level is worse than that of the roller process. The pool-type hot stuffing process cannot achieve a closed and environmentally friendly process of slag pouring, granulation, cooling and slag discharge. Although a dust hood is installed, the inherent operating process leads to low dust removal efficiency, low smoke capture rate, and a large amount of air leakage, resulting in extremely high dust removal energy consumption. The dust removal air volume of a single hot stuffing pool reaches 100,000-150,000m3 / h.

[0003] Converter slag or electric furnace slag often goes through several steelmaking cycles, and the slag pot is not sent to the slag processing workshop until it is full. During this period, part of the slag will have crystallized and solidified. The slag in the slag pot is actually a mixture of molten liquid and solid tank shell, and even contains some unmelted cold steel. Faced with the complex slag state, the existing technologies, except for the pool-type hot stuffing process, have poor adaptability to slag. Either they only process molten liquid slag, or some processes can process mixed slag, but the efficiency is low. For example, in the roller crushing process, the crushing roller is often stuck, the equipment failure rate is high, and the production line utilization rate is low.

[0004] The existing process construction investment is high. Taking the annual processing of 600,000 tons of steel slag as an example, the investment of roller granulation process is between 65 million and 75 million yuan (excluding the plant crane). This process requires at least two granulation rollers, two tilting machines, and two granulation beds. The construction investment of the pool hot stuffy process is lower than that of the roller process, but its operating cost is high, the dust removal air volume is high, and the energy consumption is high.

[0005] The principle of roller granulation is that the crushing roller rotates, driving the roller teeth on it to contact, cut and separate the slag. The roller teeth have a certain crushing effect, but the roller itself has a large diameter and a large moment of inertia, resulting in a large prime mover power. 40% of the prime mover work is used to maintain the rotation of the crushing roller itself. The power of the common roller crushing prime mover is 132kw, and the actual no-load current is about 80a. The crushing roller "eats" only 1-2cm in the length direction each time. Once the amount of material eaten is too large, the crushing roller will be overloaded and stuck. Therefore, the time it takes for the crushing roller to crush the slag once is about 4-5 minutes, and the efficiency is relatively low. Summary of the invention

[0006] In view of this, the purpose of the embodiments of the present invention is to provide an efficient and energy-saving steel slag processing equipment and processing method, which is efficient, energy-saving, labor-saving and cost-effective, and solves the technical problems existing in the prior art in the steel slag processing process, such as high production line construction investment, high operating cost, poor applicability to multiple states of steel slag, time-consuming and labor-intensive granulation and crushing methods, low production line utilization rate, high equipment failure rate, and environmental pollution.

[0007] To achieve the above-mentioned purpose, in a first aspect, an embodiment of the present invention provides a high-efficiency and energy-saving steel slag processing equipment, the steel slag processing equipment comprising: a sealing cover, a slag pot tilting machine, a solidification tank and a rake granulator;

[0008] The sealing cover is arranged on the upper part of the solidification pool and forms a closed system with the solidification pool;

[0009] The sealing cover comprises: a first inlet and outlet lifting door and a second inlet and outlet lifting door, wherein the first inlet and outlet lifting door is located at the front side of the sealing cover and is used for the rake granulator to enter and exit; the second inlet and outlet lifting door is located at the rear side of the sealing cover and is used for the slag pot tilting machine to enter and exit;

[0010] The solidification pool includes a rear baffle, a side baffle, a pool bottom and a front baffle, wherein the front baffle is located at the front of the sealing cover and corresponds to the first inlet and outlet lifting door, the rear baffle is located at the rear of the sealing cover and close to the moving passage of the slag pot tilting machine, and the front baffle is lower than the rear baffle and the side baffle;

[0011] The rake granulator comprises: a trolley, a granulating rake, a first support and a second support, wherein the first support is fixedly connected to the middle of the trolley, the granulating rake and the first support form a moving pair through the second support, the granulating rake has a horizontal translational freedom from the front baffle wall to one side of the rear baffle wall, and the trolley has a horizontal translational freedom perpendicular to the translational direction of the granulating rake;

[0012] The slag pot tilting machine is located at the tilting machine moving channel at the rear of the rear retaining wall and has the same horizontal translation freedom as the trolley. In some possible embodiments, the first support includes a first support body and a guide slideway;

[0013] The first support body comprises: two side plates and a top plate which are symmetrically arranged, wherein the top plate is arranged on the top of the two side plates and forms a gantry structure with the side plates;

[0014] The guide slideways are symmetrically arranged on the inner side surfaces of the side vertical plates.

[0015] In some possible implementations, the second support includes a second support body, a lifting cylinder, a guide key and a supporting wheel;

[0016] The second support body comprises a top plate, a bottom plate and two side plates, wherein the top plate, the bottom plate and the two side plates form a hollow box-shaped sleeve structure;

[0017] The supporting wheels are located inside the second support body and are symmetrically arranged on two side plates close to the bottom plate;

[0018] The guide key is arranged outside the second support body and is fixedly connected to the outer sides of the two side plates;

[0019] The lifting oil cylinder is arranged at the bottom of the second support body, the cylinder barrel thereof is fixedly connected to the trolley, and the cylinder rod is fixedly connected to the bottom plate.

[0020] In some possible implementations, the guide key of the second support is located in the guide slideway of the first support, and the second support and the first support form a moving pair that moves vertically.

[0021] In some possible implementations, the granulating rake includes: a push-pull rod, a main beam, a secondary beam, a roller, a rack, a lifting cylinder, a plurality of drill rods, a plurality of tooth tips, a material baffle plate and a spray device;

[0022] The main beam is a box-shaped structure with a groove on the upper end surface, and the auxiliary beam is located in the groove; a plurality of holes are provided at the bottom of the groove;

[0023] One end of the drill rod passes through the hole and is connected to the auxiliary beam, and the other end of the drill rod is connected to the tooth tip; both the drill rod and the tooth tip are hollow structures;

[0024] The baffle plates are symmetrically arranged on both sides of the drill rod, and the distance between the bottom of the baffle plates and the top of the tooth tip is 300 mm to 500 mm;

[0025] The cylinder barrel of the lifting cylinder is connected to the top of the main beam, the cylinder rod of the lifting cylinder is connected to the auxiliary beam, and the auxiliary beam has a translational freedom in the vertical direction relative to the main beam;

[0026] One end of the push-pull rod is connected to the side of the main beam, and the other end passes through the inside of the second support and is arranged on the supporting wheel. The rack is arranged on the push-pull rod and cooperates with the gear on the second support, so that the push-pull rod and the second support form a moving pair;

[0027] The rollers are arranged on both sides of the main beam along the length direction and are hingedly connected to the end faces on both sides;

[0028] The spray device is located at the bottom of the main beam and is arranged alternately with the drill rods.

[0029] In some possible implementations, the solidification pool further comprises a discharge port, a discharge port gate and a track, the discharge port is located on the bottom plate of the solidification pool and close to the front retaining wall, and the discharge port gate has horizontal translational freedom to realize the opening and closing of the discharge port;

[0030] The track is fixedly connected to the inner wall of the side retaining wall, and the top surface elevations of the tracks on the side retaining walls on both sides are equal, and the number of tracks on each side retaining wall is at least 1 level;

[0031] The roller drives the granulating rake to move back and forth in the solidification tank along the track.

[0032] In a second aspect, an embodiment of the present invention provides an efficient and energy-saving steel slag treatment method, which is applicable to the treatment equipment described in the first aspect, and the treatment method comprises:

[0033] S1, the slag pot tilting machine enters the slag pouring position in the tilting machine channel through the first inlet and outlet lifting door of the sealing cover, and the slag pot tilting machine pours the molten steel slag onto the bottom plate of the solidification pool;

[0034] S2, a granulating rake of a rake granulator enters the solidification pool through the second inlet and outlet lifting door of the sealing cover to perform shell crushing, discrete granulation and cooling treatment on the molten steel slag;

[0035] S3, the granulating rake of the rake granulator drags the solidified slag to the discharge port of the solidification tank for unloading.

[0036] In some possible implementations, S2 specifically includes:

[0037] The molten steel slag is subjected to a granulation treatment of the shell slag and a discrete separation treatment of the non-solid slag, wherein the shell slag is granulated by using a lifting cylinder of the sub-beam of the rake granulator to press the sub-beam downward, and the pressure of the lifting cylinder is transmitted to the shell slag through the sub-beam, the drill rod and the tooth tip to achieve granulation and crushing thereof;

[0038] The discrete separation of the non-solid slag is achieved by the horizontal translation of the main beam of the rake granulator driving the drill rod and the tooth tip to continuously cut the non-solid slag and physically separate the non-solid slag.

[0039] In some possible implementations, S3 specifically includes:

[0040] After the lifting cylinder of the sub-beam of the rake granulator drives the sub-beam, the drill rod, the material baffle plate and the tooth tip to descend to a preset height, the main beam of the rake granulator drives the sub-beam, the drill rod, the material baffle plate and the tooth tip to move toward the discharge port of the solidification pool, and the drill rod and the material baffle plate drive the granulated and solidified steel slag to move to the discharge port for unloading.

[0041] In some possible implementations, after S3, the processing method further includes: secondary cooling the steel slag solidified in the solidification pool, or processing the steel slag solidified in the solidification pool through a crushing, screening and magnetic separation processing line.

[0042] The beneficial technical effects of the above technical solution are:

[0043] 1. The process flow and main equipment are greatly simplified. One slag pot tilting machine can correspond to multiple solidification beds, and one rake granulator can process the steel slag on multiple solidification beds, which reduces the construction investment by more than 50% and the operating cost by more than 50% under the same slag volume, and saves floor space;

[0044] 2. When crushing the tank shell slag, the hydraulic cylinder drives the drill rod to press vertically into the tank shell slag to achieve the crushing and granulation of the tank shell slag. There is no force arm offset, and the crushing is more labor-saving. Under the same prime mover crushing power, the rake granulation output is more than 6 times that of the roller granulation output; when dispersing liquid slag, it is not limited by the amount of material eaten at one time, and the liquid slag can be separated and solidified by the sliding of the drill rod tooth tip;

[0045] 3. The phenomenon of steel jam is reduced, and the handling of steel jam is more convenient. The granulation rake can rake the slag steel directly out of the granulation area;

[0046] 4. The environmental protection level is high. The entire processing link (including slag pouring, granulation, cooling and slag discharge) is basically carried out in a fully closed system. The dust removal air volume is greatly reduced, saving energy and reducing consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 It is a schematic diagram of the overall structure of a high-efficiency and energy-saving steel slag processing equipment implemented by the present invention;

[0049] Figure 2 It is a side view of a high-efficiency and energy-saving slag processing equipment implemented by the present invention;

[0050] Figure 3 It is a schematic diagram of the overall structure of a first support implemented in the present invention;

[0051] Figure 4 is a side view of a first support implemented by the present invention;

[0052] Figure 5 It is a schematic diagram of the overall structure of a second support implemented by the present invention;

[0053] Figure 6 is a top view of a second support according to an embodiment of the present invention;

[0054] Figure 7 is a side view of a second support according to an embodiment of the present invention;

[0055] Figure 8 is an assembly diagram of a first support and a second support structure according to an embodiment of the present invention;

[0056] Fig. 9 is a side view of a granulation rake according to an embodiment of the present invention;

[0057] Fig.10 is a top view of a granulation rake according to an embodiment of the present invention;

[0058] Fig.11 is a front view of a granulation rake according to an embodiment of the present invention;

[0059] Fig.12 It is a flow chart of an efficient and energy-saving steel slag treatment method according to an embodiment of the present invention.

[0060] Description of Figure Numbers:

[0061] 1. Sealing cover; 1-1. First inlet and outlet lift door; 1-2. Second inlet and outlet lift door;

[0062] 2. Slag pot tipping machine;

[0063] 3. Solidification tank; 3-1. Rear retaining wall; 3-2. Side retaining wall; 3-3. Tank bottom; 3-4. Front retaining wall; 3-5. Discharge port; 3-6. Discharge port gate; 3-7. Track;

[0064] 4. Rake granulator; 4-1. Trolley; 4-2. Granulating rake; 4-2-1. Push-pull rod; 4-2-2. Main beam; 4-2-3. Subbeam; 4-2-4. Roller; 4-2-5. Rack; 4-2-6. Lifting cylinder; 4-2-7. Drill rod; 4-2-8. Tooth tip; 4-2-9. Baffle plate; 4-2-10. Spraying device; 4-3. First support; 4-3-1. The first support body; 4-3-1a, side plate; 4-3-1b, connecting plate; 4-3-2, guide slide; 4-4, second support; 4-4-1, second support body; 4-4-1a, top plate; 4-4-1b, bottom plate; 4-4-1c, side plate; 4-4-2, second support lifting cylinder; 4-4-3, guide key; 4-4-4, support wheel; 4-4-5, gear. DETAILED DESCRIPTION

[0065] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least part of the known structures and technologies are not shown in order to avoid unnecessary ambiguity of the present invention; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0066] Embodiment 1

[0067] Figure 1 It is a schematic diagram of the overall structure of a high-efficiency and energy-saving slag processing equipment implemented by the present invention. Figure 2 1 is a side view of a high-efficiency and energy-saving slag processing equipment implemented by the present invention, such as Figure 1 and Figure 2As shown, the slag processing equipment includes: a sealing cover 1, a slag pot tilting machine 2, a solidification pool 3 and a rake granulator 4; the sealing cover 1 is arranged on the upper part of the solidification pool 3 and forms a closed system with the solidification pool 3; the sealing cover 1 includes: a first inlet and outlet lifting door 1-1 and a second inlet and outlet lifting door 1-2, the first inlet and outlet lifting door 1-1 is located at the front side of the sealing cover 1, and is used for the rake granulator 4 to enter and exit; the second inlet and outlet lifting door 1-2 is located at the rear side of the sealing cover 1, and is used for the slag pot tilting machine 2 to enter and exit; the solidification pool 3 includes a rear retaining wall 3-1, a side retaining wall 3-2, a pool bottom 3-3 and a front retaining wall 3-4, the front retaining wall 3-4 is located at the front of the sealing cover 1, corresponding to the first inlet and outlet lifting door 1-1, and the rear retaining wall 3-4 is located at the front of the sealing cover 1. -1 is located at the rear of the sealing cover 1, corresponding to the second inlet and outlet lifting door 1-2; the rake granulator 4 includes: a trolley 4-1, a granulating rake 4-2, a first support 4-3 and a second support 4-4, the first support 4-3 is fixedly connected to the middle of the trolley 4-1, the granulating rake 4-2 and the first support 4-3 form a moving pair through the second support 4-4, the granulating rake 4-2 has a horizontal translational freedom from the front retaining wall 3-4 to the side of the side retaining wall 3-2, and the trolley 4-1 has a horizontal translational freedom perpendicular to the translational direction of the granulating rake 4-2; the slag pot tilting machine 2 is located at the tilting machine channel at the rear of the rear retaining wall 3-1, and has a horizontal translational freedom in the same direction as the trolley 4-1.

[0068] In this embodiment, when pouring slag, the first inlet and outlet lifting door 1-1 and the second inlet and outlet lifting door 1-2 of the sealing cover 1 are both in a closed state, so the closed system in the embodiment refers to the closed state during the slag pouring process; because the amount of dust generated during the slag pouring is particularly large, this application adopts a closed system during the slag pouring process to prevent dust from entering the air and polluting the environment. In addition, during granulation, the second inlet and outlet lifting door 1-2 is closed, and the first inlet and outlet lifting door 1-1 is in a half-open state. The slag discharge state is similar to the granulation state, and full sealing is achieved as much as possible to reduce air leakage.

[0069] Since the trolley 4-1 has the horizontal translation freedom perpendicular to the translation direction of the granulating rake 4-2, that is, it can move horizontally between multiple solidification pools 3, so that one rake granulator 4 can correspond to multiple solidification pools 3, that is, it can process steel slag on multiple solidification pools 3, which is flexible and maneuverable. The weight of a single set of rake granulator 4 is less than 100 tons, and the processing capacity is higher than that of the roller crushing process. Similarly, the slag pot tilting machine 2 can also move back and forth between multiple solidification pools 3, that is, it can dump steel slag into multiple solidification pools 3, which greatly improves the overall working efficiency of the equipment, and the construction investment and operating cost of the one-time treatment of steel slag are greatly reduced. Taking the annual treatment of 600,000 tons of steel slag as an example, the construction investment of the one-time treatment process is only about 30 million yuan, and the operating cost per ton of slag is about 10 yuan, which greatly saves costs.

[0070] Figure 3 is a schematic diagram of the overall structure of a first support implemented in the present invention, Figure 4 is a side view of a first support implemented in the present invention, such as Figure 3 and Figure 4 As shown, in some embodiments, the first support 4-3 includes a first support body 4-3-1 and a guide slide 4-3-2; the first support body 4-3-1 includes: two symmetrically arranged side panels 4-3-1a and a connecting plate 4-3-1b, the connecting plate 4-3-1b is arranged on the top of the two side panels 4-3-1a, and forms a gantry structure with the side panels 4-3-1a; the guide slide 4-3-2 is symmetrically arranged on the inner side of the side panels 4-3-1a.

[0071] Figure 5 is a schematic diagram of the overall structure of a second support implemented in the present invention, Figure 6 is a top view of a second support according to an embodiment of the present invention, Figure 7 is a side view of a second support according to an embodiment of the present invention, Figures 5 to 7 As shown, in some embodiments, the second support 4-4 includes a second support body 4-4-1, a lifting cylinder 4-4-2, a guide key 4-4-3 and a supporting wheel 4-4-4; the second support body 4-4-1 includes a top plate 4-4-1a, a bottom plate 4-4-1b and two side plates 4-4-1c, and the top plate 4-4-1a, the bottom plate 4-4-1b and the two side plates 4-4-1c form a hollow box-type sleeve structure; the supporting wheel 4-4- 4 is located inside the second support body 4-4-1 and is symmetrically arranged on the two side plates 4-4-1c close to the bottom plate 4-4-1b; the guide key 4-4-3 is arranged outside the second support body 4-4-1 and is fixedly connected to the outer sides of the two side plates 4-4-1c; the lifting cylinder 4-4-2 is arranged at the bottom of the second support body 4-4-1, and its cylinder barrel is fixedly connected to the trolley 4-1, and the cylinder rod is fixedly connected to the bottom plate 4-4-1b.

[0072] Figure 8 : is an assembly diagram of a first support and a second support structure of an embodiment of the present invention, such as Figure 8 As shown, in some embodiments, the guide key 4-4-3 of the second support 4-4 is located in the guide slide 4-3-2 of the first support 4-3, and the second support 4-4 and the first support 4-3 form a moving pair for vertical translation. In this embodiment, the guide key 4-4-3 slides up and down in the guide slide 4-3-2 to avoid the second support from deflecting and shaking when moving vertically. In this embodiment, the second support slides in the first support, which can be fully applicable to different initial heights of slag.

[0073] Fig. 9 is a side view of a granulation rake according to an embodiment of the present invention, Fig.10 is a top view of a granulation rake according to an embodiment of the present invention, Fig.112 is a front view of a granulating rake according to an embodiment of the present invention. Figures 9 to 11 As shown, in some embodiments, the granulating rake 4-2 includes: a push-pull rod 4-2-1, a main beam 4-2-2, a sub-beam 4-2-3, a roller 4-2-4, a rack 4-2-5, a lifting cylinder 4-2-6, a plurality of drill rods 4-2-7, a plurality of tooth tips 4-2-8, a material blocking plate 4-2-9 and a spray device 4-2-10; the main beam 4-2-2 is a box-shaped structure with a groove on the upper end surface, and the sub-beam 4-2-3 is located in the groove; a plurality of holes are provided at the bottom of the groove; one end of the drill rod 4-2-7 passes through the hole and connects with the sub-beam The drill rod 4-2-7 is connected with the tooth tip 4-2-8 at the other end; the drill rod 4-2-7 and the tooth tip 4-2-8 are both hollow structures, which can reduce the weight and facilitate water cooling of the drill rod 4-2-7 and the tooth tip 4-2-8, so as to ensure that the drill rod 4-2-7 and the tooth tip 4-2-8 are stable and wear-resistant at high temperatures and increase their service life; the baffle plates 4-2-9 are symmetrically arranged on both sides of the drill rod 4-2-7, and the distance between the bottom of the baffle plates 4-2-9 and the top of the tooth tip 4-2-8 is 300mm to 500mm. 00mm, more slag can be carried at one time during slag discharge, which improves the slag discharge efficiency. The cylinder barrel of the lifting cylinder 4-2-6 is connected to the top of the main beam 4-2-2, and the cylinder rod of the lifting cylinder 4-2-6 is connected to the auxiliary beam 4-2-3. The auxiliary beam 4-2-3 has a translational freedom in the vertical direction relative to the main beam 4-2-2; one end of the push-pull rod 4-2-1 is connected to the side of the main beam 4-2-2, and the other end passes through the inside of the second support 4-4 and is set on the supporting wheel 4-4-4. The rack 4-2-5 is set on the push-pull rod On 4-2-1, a gear 4-4-5 is arranged inside the second support 4-4, and the gear is driven by a hydraulic motor arranged on the side plate 4-4-1c of the second support 4-4 to drive the rack 4-2-5 to rotate, so that the push-pull rod 4-2-1 and the second support 4-4 form a moving pair, and the rollers 4-2-4 are arranged on both sides of the main beam 4-2-2 along the length direction and are hingedly connected to the end faces on both sides; the spray device 4-2-10 is located at the bottom of the main beam 4-2-2 and is alternately arranged with the drill rod 4-2-7, which improves the heat exchange efficiency.

[0074] Specifically, in the process of crushing the tank shell slag in this embodiment, the lifting cylinder 4-2-6 drives the drill rod 4-2-7 to exert force vertically up and down through the auxiliary beam 4-2-3, and vertically presses into the tank shell slag, and the force is completely transmitted to the rake tooth tip 4-2-8 of the granulating rake 4-2. The rake tooth tip 4-2-8 acts vertically and without offset on the tank shell slag, and the force is directly pressed on it to crush it. There is no force arm offset, the crushing is more labor-saving, and the steel jamming phenomenon is reduced. Even if there is steel jamming, the granulating rake 4-2 can directly rake the slag steel out of the granulation area, and when discrete liquid slag, it is not limited by the amount of material eaten at one time. The liquid slag can be separated and solidified by relying on the sliding of the drill rod 4-2-7 and the tooth tip 4-2-8, and then the solidified steel slag can be dragged to the discharge port of the solidification pool 3 through the material baffle plate 4-2-9 through the moving pair formed by the push-pull rod 4-2-1 and the second support 4-4, which can improve the dragging efficiency.

[0075] In addition, since the embodiment of the present invention can drive the auxiliary beam to exert force up and down by the lifting cylinder, there is no need to lift the entire granulating rake up and down, in this embodiment, a second lifting sub-door can be arranged outside the second entrance and exit lifting door to further reduce the opening of the second lifting door and achieve a closed state as much as possible.

[0076] The processing capacity of a single set of the rake granulator 4 in the embodiment of the present invention reaches 500,000 tons / year (one rake granulator 4 can correspond to multiple granulation processing stations), the granulator rake 4-2 weighs only 30 tons and has a light structure. The lifting cylinder 4-2-6 drives the auxiliary beam 4-2-3 to crush the tank shell slag, and its output is vertical up and down. The force is completely transmitted to the rake tooth tip 4-2-8 of the granulator rake 4-2 (taking the hydraulic cylinder bore of 200mm and the system pressure of 20Mpa as an example, the rake tooth crushing force reaches 628KN, which is more than 6 times that of the roller crusher). The force of the rake tooth tip 4-2-8 directly acts on the tank shell slag, there is no deviation, and the steel jamming phenomenon is reduced. Even if there is steel jamming, the granulator rake 4-2 of this embodiment can directly rake the slag steel out of the granulation area.

[0077] like Figure 1 , Figure 2 and Fig.11As shown, in some embodiments, the solidification pool 3 further includes a discharge port 3-5, a discharge port gate 3-6 and a track 3-7. The discharge port is located at the bottom 3-3 of the solidification pool 3 and close to the front retaining wall 3-4. The discharge port gate has horizontal translational freedom to realize the opening and closing of the discharge port; the track 3-7 is fixedly connected to the inner wall of the side retaining wall 3-2, and the top surface elevations of the tracks 3-7 on the side retaining walls 3-2 on both sides are equal, and the number of tracks 3-7 on each side retaining wall 3-2 is at least 1 level; it should be noted that the number of levels of the track 3-7 is set based on the original slag accumulation height. For example, if the incoming slag is relatively thick, the accumulation height may be relatively high. At this time, the main beam 4-2-2 needs to be raised to crush the tank shell slag; the roller 4-2-4 drives the granulating rake 4-2 to move back and forth in the solidification pool 3 along the track 3-7.

[0078] A fully enclosed steel slag processing equipment provided by an embodiment of the present invention forms a closed system during the slag pouring process through the combination of a sealing cover 1, a slag pot tilting machine 2, a solidification pool 3 and a rake granulator 4, thereby reducing dust and smoke leakage and improving environmental protection effects.

[0079] The embodiment of the present invention increases the moving stability and positioning accuracy of the rake granulator 4 and improves the efficiency and stability of the granulation process by means of the improved first support structure 4-3, including the guide slide 4-3-2.

[0080] The embodiment of the present invention adds a second support 4-4, including a lifting cylinder 4-4-2 and a guide key 4-4-3, to achieve more precise control of the granulation rake during the granulation process, enhance the flexibility of vertical and horizontal movement, and ensure the efficiency and accuracy of the granulation process.

[0081] The embodiment of the present invention utilizes the moving pair relationship between the second support 4-3 and the first support 4-4 to further increase the stability of the device and ensure reliability when working at different heights.

[0082] The embodiment of the present invention improves the granulation effect and increases the flexibility of mechanical movement by refining the composition of the granulating rake 4-2, including the push-pull rod 4-2-1, the tooth tip 4-2-8 and other detailed designs, so as to cope with steel slag in different states and achieve efficient treatment.

[0083] The embodiment of the present invention further optimizes the slag discharge process of the solidification tank by providing a discharge port and tracks 3-7, reduces manual intervention, and improves the automation and safety of the operation.

[0084] Embodiment 2

[0085] Fig.12 is a flow chart of an efficient and energy-saving steel slag treatment method according to an embodiment of the present invention, such as Fig.12As shown, the embodiment of the present invention also provides a high-efficiency and energy-saving steel slag treatment method, which comprises the following steps:

[0086] S1, the slag pot tilting machine 2 enters the slag pouring position in the tilting machine channel through the first inlet and outlet lifting door 1-1 of the sealing cover 1, and the slag pot tilting machine 2 pours the molten steel slag onto the bottom 3-3 of the solidification pool 3;

[0087] S2, the granulating rake 4-2 of the rake granulator 4 enters the solidification pool 3 through the second inlet and outlet lifting door 1-2 of the sealing cover 1, and performs shell crushing, discrete granulation and cooling treatment on the molten steel slag;

[0088] S3, the granulating rake 4-2 of the rake granulator 4 drags the solidified slag to the discharge port of the solidification tank 3 for unloading.

[0089] In the treatment process of the embodiment of the present invention, the entire treatment link (including slag pouring, granulation, cooling and slag discharge) is basically carried out in an energy-efficient and efficient manner, and the dust removal air volume is greatly reduced, which not only saves energy and reduces consumption, but also has a high level of environmental protection. Moreover, a slag pot tipping machine can correspond to multiple solidification beds, and a rake granulator can process steel slag on multiple solidification bed stations, which greatly simplifies the process flow and main equipment. In some embodiments, the treatment method may also include: secondary cooling of the steel slag solidified in the solidification pool 3, or processing the steel slag solidified in the solidification pool 3 through a crushing, screening and magnetic separation processing line. Since the slag discharge temperature of the solidification pool 3 is 80-900°C, the steel slag solidified in the solidification pool 3 can also be secondary cooled, or the steel slag solidified in the solidification pool 3 can be processed through a crushing, screening and magnetic separation processing line.

[0090] In some embodiments, step S2 specifically includes: granulating the molten steel slag and discretely separating the non-solid slag, wherein the granulating of the molten steel slag is performed by using the lifting cylinder 4-2-6 of the sub-beam 4-2-3 of the rake granulator 4 to press the sub-beam 4-2-3 downward, and the pressure of the lifting cylinder 4-2-6 is transmitted to the tank shell slag through the sub-beam 4-2-3, the drill rod 4-2-7 and the tooth tip 4-2-8 to achieve granulation and crushing; the discrete separation of the non-solid slag is performed by driving the drill rod 4-2-7 and the tooth tip 4-2-8 to continuously cut the non-solid slag through the horizontal translation of the main beam 4-2-2 of the rake granulator 4, and physically separating the non-solid slag. In this embodiment, in order to prevent the crystallization and crusting of the steel slag, the purpose of the one-time treatment of the steel slag is to cool and pulverize the steel slag to achieve small particles, which is conducive to the later iron selection.

[0091] In some embodiments, step S3 specifically includes: after the lifting cylinder 4-2-6 of the sub-beam 4-2-3 of the rake granulator 4 drives the sub-beam 4-2-3, the drill rod 4-2-7, the baffle plate 4-2-9 and the tooth tip 4-2-8 to descend to a preset height, the main beam 4-2-2 of the rake granulator 4 drives the sub-beam 4-2-3, the drill rod 4-2-7, the baffle plate 4-2-9 and the tooth tip 4-2-8 to move toward the discharge port of the solidification pool 3, and the drill rod 4-2-7 and the baffle plate 4-2-9 drive the granulated and solidified slag to move to the discharge port for unloading.

[0092] The steel slag processing method of the embodiment of the present invention greatly reduces the construction investment and operating cost of the one-time processing of steel slag. Taking the annual processing of 600,000 tons of steel slag as an example, the one-time processing process construction investment is only about 30 million yuan, and the operating cost per ton of slag is about 10 yuan; one tilting machine can correspond to multiple solidification beds, and one rake granulator 4 can process the steel slag on multiple solidification bed stations. It is flexible and maneuverable. The weight of a single set of rake granulators 4 is less than 100 tons, and the processing capacity is higher than roller crushing. The process flow and main equipment are greatly simplified, and the processing efficiency is high. The processing process of this embodiment solves the problems of high investment, high operating cost, poor applicability to multi-state steel slag, and laborious granulation and crushing methods of the existing process. The processing process of this embodiment has low investment, low operating cost, good adaptability, and labor-saving method.

[0093] In addition, the high-efficiency and energy-saving steel slag treatment equipment and process of the present invention are also suitable for casting slag treatment.

[0094] The embodiment of the present invention proposes an efficient and energy-saving steel slag treatment method, which effectively reduces pollution and improves environmental protection effects during slag pouring, granulation and unloading through a closed design of the entire process.

[0095] The embodiment of the present invention adds a secondary cooling or magnetic separation processing step to improve the quality of the processed slag and lay a foundation for subsequent resource utilization.

[0096] The embodiment of the present invention describes the operation steps of the granulation process in more detail, improves the granulation and separation effects during the treatment process, and adapts to steel slags with different characteristics.

[0097] The embodiment of the present invention optimizes the unloading step, utilizes the mechanical structure of the rake granulator, simplifies the transfer process of the solidified slag, and improves the slag discharge efficiency.

[0098] These technical effects jointly improve the efficiency, reliability, applicability and environmental protection of steel slag treatment, providing a more comprehensive and advanced steel slag treatment solution.

[0099] In the description of the embodiments of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0100] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed, connected, connected" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0101] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-efficiency and energy-saving steel slag processing equipment, characterized in that: The steel slag processing equipment comprises: a sealing cover (1), a slag pot tilting machine (2), a solidification tank (3) and a rake granulator (4); The sealing cover (1) is arranged on the upper part of the solidification pool (3) and forms a closed system with the solidification pool (3); The sealing cover (1) comprises: a first inlet and outlet lifting door (1-1) and a second inlet and outlet lifting door (1-2); the first inlet and outlet lifting door (1-1) is located at the front side of the sealing cover (1) and is used for the rake granulator (4) to enter and exit; the second inlet and outlet lifting door (1-2) is located at the rear side of the sealing cover (1) and is used for the slag pot tilting machine (2) to enter and exit; The solidification pool (3) comprises a rear baffle (3-1), a side baffle (3-2), a pool bottom (3-3) and a front baffle (3-4); the front baffle (3-4) is located at the front of the sealing cover (1) and corresponds to the first inlet and outlet lifting door (1-1); the rear baffle (3-1) is located at the rear of the sealing cover (1) and close to the moving passage of the slag pot tilting machine (2); the front baffle (3-4) is lower than the rear baffle (3-1) and the side baffle (3-2); The rake granulator (4) comprises: a trolley (4-1), a granulating rake (4-2), a first support (4-3) and a second support (4-4); the first support (4-3) is fixedly connected to the middle part of the trolley (4-1); the granulating rake (4-2) and the first support (4-3) form a moving pair through the second support (4-4); the granulating rake (4-2) has a horizontal translational freedom from the front baffle wall (3-4) to one side of the rear baffle wall (3-1); and the trolley (4-1) has a horizontal translational freedom perpendicular to the translational direction of the granulating rake (4-2); The slag pot tilting machine (2) is located at the tilting machine moving channel at the rear of the rear retaining wall (3-1) and has a horizontal translational freedom in the same direction as the trolley (4-1).

2. The high-efficiency and energy-saving slag processing equipment according to claim 1 is characterized in that: The first support (4-3) comprises a first support body (4-3-1) and a guide slideway (4-3-2); The first support body (4-3-1) comprises: two symmetrically arranged side plates (4-3-1a) and a connecting plate (4-3-1b), wherein the connecting plate (4-3-1b) is arranged on the top of the two side plates (4-3-1a) and forms a gantry structure with the side plates (4-3-1a); The guide slideway (4-3-2) is symmetrically arranged on the inner side surface of the side vertical plate (4-3-1a).

3. The high-efficiency and energy-saving slag processing equipment according to claim 1 is characterized in that: The second support (4-4) comprises: a second support body (4-4-1), a lifting cylinder (4-4-2), a guide key (4-4-3) and a supporting wheel (4-4-4); The second support body (4-4-1) comprises a top plate (4-4-1a), a bottom plate (4-4-1b) and two side plates (4-4-1c), wherein the top plate (4-4-1a), the bottom plate (4-4-1b) and the two side plates (4-4-1c) form a hollow box-type sleeve structure; The supporting wheels (4-4-4) are located inside the second support body (4-4-1) and are symmetrically arranged on two side plates close to the bottom plate (4-4-1b); The guide key (4-4-3) is arranged outside the second support body (4-4-1) and is fixedly connected to the outer sides of the two side plates; The lifting cylinder (4-4-2) is arranged at the bottom of the second support body (4-4-1), the cylinder barrel thereof is fixedly connected to the trolley (4-1), and the cylinder rod is fixedly connected to the bottom plate (4-4-1b).

4. The high-efficiency and energy-saving slag processing equipment according to claim 2 or 3, characterized in that: The guide key (4-4-3) of the second support (4-4) is located in the guide slideway (4-3-2) of the first support (4-3), and the second support (4-4) and the first support (4-3) form a moving pair that moves vertically.

5. The high-efficiency and energy-saving slag processing equipment according to claim 1 is characterized in that: The granulating rake (4-2) comprises: a push-pull rod (4-2-1), a main beam (4-2-2), a secondary beam (4-2-3), a roller (4-2-4), a rack (4-2-5), a lifting cylinder (4-2-6), a plurality of drill rods (4-2-7), a plurality of tooth tips (4-2-8), a material blocking plate (4-2-9) and a spray device (4-2-10); The main beam (4-2-2) is a box-shaped structure with a groove on the upper end surface, and the auxiliary beam (4-2-3) is located in the groove; a plurality of holes are arranged at the bottom of the groove; One end of the drill rod (4-2-7) passes through the hole and is connected to the auxiliary beam (4-2-3), and the other end of the drill rod (4-2-7) is connected to the tooth tip (4-2-8); the drill rod (4-2-7) and the tooth tip (4-2-8) are both hollow structures; The material blocking plate (4-2-9) is symmetrically arranged on both sides of the drill rod (4-2-7), and the distance between the bottom of the material blocking plate (4-2-9) and the top of the tooth tip (4-2-8) is 300 mm to 500 mm; The cylinder barrel of the lifting cylinder (4-2-6) is connected to the top of the main beam (4-2-2), the cylinder rod of the lifting cylinder (4-2-6) is connected to the auxiliary beam (4-2-3), and the auxiliary beam (4-2-3) has a translational freedom in the vertical direction relative to the main beam (4-2-2); One end of the push-pull rod (4-2-1) is connected to the side of the main beam (4-2-2), and the other end passes through the inside of the second support (4-4) and is arranged on the supporting wheel (4-4-4); the rack (4-2-5) is arranged on the push-pull rod (4-2-1); the rack (4-2-5) cooperates with the gear (4-4-5) on the second support (4-4) so ​​that the push-pull rod (4-2-1) and the second support (4-4) form a moving pair; The rollers (4-2-4) are arranged on both sides of the main beam (4-2-2) along the length direction and are hingedly connected to the end surfaces on both sides; The spray device (4-2-10) is located at the bottom of the main beam (4-2-2) and is arranged alternately with the drill rod (4-2-7).

6. The high-efficiency and energy-saving steel slag processing equipment according to claim 5, characterized in that: The solidification pool (3) further comprises a discharge port (3-5), a discharge port gate (3-6) and a track (3-7); the discharge port (3-5) is located at the bottom (3-3) of the solidification pool (3) and close to the front retaining wall (3-4); the discharge port gate (3-6) has a horizontal translational degree of freedom to realize the opening and closing of the discharge port (3-5); The track (3-7) is fixedly connected to the inner wall of the side retaining wall (3-2), and the top surface elevations of the tracks (3-7) on the side retaining walls (3-2) on both sides are equal, and the number of tracks (3-7) on each side retaining wall (3-2) is at least one level; The roller (4-2-4) drives the granulating rake (4-2) to move back and forth in the solidification tank (3) along the track (3-7).

7. A high-efficiency and energy-saving steel slag treatment method, characterized in that: The processing method is applicable to the processing equipment according to any one of claims 1 to 6, and the processing method comprises: S1, the slag pot tilting machine (2) enters the slag pouring position in the tilting machine channel through the first inlet and outlet lifting door (1-1) of the sealing cover (1), and the slag pot tilting machine (2) pours the molten steel slag onto the bottom (3-3) of the solidification pool (3); S2, the granulating rake (4-2) of the rake granulator (4) enters the solidification pool (3) through the second inlet and outlet lifting door (1-2) of the sealing cover (1), and performs shell crushing, discrete granulation and cooling treatment on the molten steel slag; S3, the granulating rake (4-2) of the rake granulator (4) drags the solidified slag to the discharge port (3-5) of the solidification tank (3) for unloading.

8. The processing method according to claim 7, characterized in that: The S2 specifically includes: The molten steel slag is subjected to a granulation treatment of the tank shell slag and a discrete separation treatment of the non-solid slag. The tank shell slag is granulated by using a lifting cylinder (4-2-6) of the auxiliary beam (4-2-3) of the rake granulator (4) to press the auxiliary beam (4-2-3) downward, and the pressure of the lifting cylinder (4-2-6) is transmitted to the tank shell slag through the auxiliary beam (4-2-3), the drill rod (4-2-7) and the tooth tip (4-2-8), thereby achieving granulation and crushing of the tank shell slag; The non-solid slag is discretely separated by the horizontal translation of the main beam (4-2-2) of the rake granulator (4) to drive the drill rod (4-2-7) and the tooth tip (4-2-8) to continuously cut the non-solid slag and physically separate the non-solid slag.

9. The processing method according to claim 7, characterized in that: The S3 specifically includes: After the lifting cylinder (4-2-6) of the secondary beam (4-2-3) of the rake granulator (4) drives the secondary beam (4-2-3), the drill rod (4-2-7), the material baffle plate (4-2-9) and the tooth tip (4-2-8) to descend to a preset height, the main beam (4-2-2) of the rake granulator (4) drives the secondary beam (4-2-3), the drill rod (4-2-7), the material baffle plate (4-2-9) and the tooth tip (4-2-8) to move toward the discharge port (3-5) of the solidification pool (3), and the drill rod (4-2-7) and the material baffle plate (4-2-9) drive the granulated and solidified steel slag to move to the discharge port (3-5) to realize discharge.

10. The processing method according to any one of claims 7 to 9, characterized in that: After S3, the method further includes: performing secondary cooling on the steel slag solidified in the solidification pool (3), or processing the steel slag solidified in the solidification pool (3) through a crushing, screening and magnetic separation processing line.

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