Molten steel slag air cooling treatment device based on circular cooler

Abstract

The utility model discloses a molten steel slag air-cooling treatment device based on an annular cooler. The molten steel slag air-cooling treatment device comprises the annular cooler, a material conveying mechanism, a slag pot tipping mechanism, a crusher, a plate feeder, a slag braising mechanism, a gravity dust collector, a waste heat boiler, a circulating fan and a circulating air pipe. The air cooling treatment device is based on the structure of the circular cooler, the slag pot tipping mechanism is combined to realize air cooling treatment of molten steel slag in the circular cooler, an existing treatment mode needing cooling water is changed, waste gas generated by heat exchange is firstly subjected to impurity removal and then enters a waste heat boiler to generate steam, the steam can be used for power generation or production, energy is saved, and meanwhile, energy is saved. The use efficiency of heat is greatly improved; in addition, the steel slag rotates along with the circular cooler, the requirement for the viscosity of the steel slag is not high, the treatment method of the treatment device is scientific and reasonable in arrangement aiming at the structure of the device, continuous, automatic and efficient treatment of steel slag treatment can be achieved, the yield of metal iron in the slag is high, and the steel slag is stable in performance and high in environmental protection performance.

Description

Technical Field

[0001] This utility model relates to the field of molten steel slag treatment technology, specifically to a molten steel slag air-cooling treatment device based on an annular cooler. Background Technology

[0002] Currently, there are many methods for treating and crushing molten steel slag, mainly including hot pouring, hot quenching, water quenching, air quenching, drum quenching, and granulation wheel methods. Among these methods, hot pouring requires a large area, has a long processing cycle, and generates a large amount of steam with unorganized emissions. Water quenching, air quenching, drum quenching, and granulation wheel methods all require high fluidity of the molten slag and are only suitable for processing molten steel slag with good fluidity. With the advancement of steelmaking technology, the viscosity of steel slag tends to increase, which is detrimental to the safe and efficient treatment of molten steel slag. In addition, all of the above methods require water cooling of the molten steel slag, which generates a large amount of steam during the cooling process. The steam contains a large amount of steel slag dust, which quickly forms scale on the pipe walls and heat exchangers, making it difficult to recover the heat energy from the steam. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a molten steel slag treatment device based on an annular cooler. This treatment device is pollution-free and has the advantages of heat energy utilization, high efficiency, safety, and environmental protection.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A cooling device for molten steel slag based on an annular cooler includes an annular cooler with a feed inlet connected to a conveying mechanism. The conveying mechanism has a slag pot tilting mechanism that can move on it. The discharge port of the annular cooler is connected to a crusher via a slag chute. The discharge port of the crusher is connected to a plate feeder via a slag chute. The plate feeder conveys the crushed solid steel slag particles to a slag-suppressing pot. The slag-suppressing pot is transported to the hoisting outlet of the slag-suppressing mechanism by a slag pot transport vehicle. The top of the annular cooler is connected to a gravity dust collector and a waste heat boiler via a dust removal duct. The waste heat boiler is connected to a circulating air pipe via a circulating fan. The circulating air pipe is connected to the annular cooler.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] This air-cooling treatment device is based on the structure of an annular cooler and incorporates a slag pot tilting mechanism to achieve air-cooling treatment of molten steel slag within the annular cooler. This changes the existing treatment method that requires cooling water. The waste gas generated during heat exchange is first purified before entering the waste heat boiler to generate steam, which can be used for power generation or production. This saves energy and greatly improves the efficiency of heat utilization. In addition, the steel slag is processed as the annular cooler rotates, so the viscosity requirements for the steel slag are not high. This enables continuous, automated, and efficient processing of steel slag, with a high recovery rate of metallic iron from the slag, stable steel slag performance, and high environmental performance. Attached Figure Description

[0008] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Reference numerals: 1. Circulating cooler; 1-1. Circulating cooler body; 1-2. Leveling mechanism; 1-3. Sealed exhaust gas collection hood; 1-4. Blower; 1-5. Dust removal branch pipe; 1-6. Slag collection tank; 2. Conveying mechanism; 2-1. Conveying platform; 2-2. Conveying track; 3. Slag tank tilting mechanism; 4. Crusher; 5. Slag simmering tank; 6. Slag simmering mechanism; 7. Dust removal duct; 8. Gravity dust collector; 9. Waste heat boiler; 10. Circulating fan; 11. Circulating air pipe. Detailed Implementation

[0011] like Figure 1The present invention provides a specific embodiment of a molten steel slag air-cooling treatment device based on an annular cooler, comprising an annular cooler 1, wherein the annular cooler 1 includes an annular cooler body 1-1, and a leveling mechanism 1-2 is uniformly arranged along its circumference inside the annular cooler body 1-1. The leveling mechanism 1-2 is used to level the molten steel slag. A sealed exhaust gas collection hood 1-3 is provided at the top of the annular cooler body 1-1. Several blowers 1-4 are uniformly connected to the side of the sealed exhaust gas collection hood 1-3 along its circumference through air ducts. Several dust removal air branch pipes 1-5 are uniformly arranged at the top of the sealed exhaust gas collection hood 1-3 along its circumference. The dust removal air branch pipes 1-5 are all connected to the dust removal air duct 7. The ring cooler body 1-1 is connected to the circumference of the bottom end, where a plurality of slag collection tanks 1-6 are evenly arranged. These slag collection tanks 1-6 are used to collect fine slag leaking from between the grates of the ring cooler body 1-1 and slag scattered when the slag tank tilting mechanism 3 tilts. The ring cooler 1 has a feed inlet connected to the conveying mechanism 2. In this embodiment, the conveying mechanism 2 includes a conveying platform 2-1 and a conveying track 2-2 on the conveying platform 2-1. The conveying mechanism 2 has a movable slag tank tilting mechanism 3, which can move back and forth along the conveying track 2-2. For detailed structure of the slag tank tilting mechanism 3, please refer to patent number CN214781. In this embodiment of the utility model 925U, a roller matching the conveying track 2-2 is provided on the slag pot tilting mechanism 3. Molten steel slag is poured into the slag pot of the tilting mechanism 3. After being conveyed to the end by the conveying mechanism 2, the tilting mechanism 3 tilts the molten steel slag into the inlet of the ring cooler 1. The 1400℃ molten steel slag rotates with the ring cooler body 1-1 and exchanges heat with the dry cold air blown in by the blower 1-4, condensing into solid steel slag at 600℃. The discharge port of the ring cooler 1 is connected to the crusher 4 through a slag chute. In this embodiment, the solid steel slag is crushed into particles with a diameter of less than 50mm in the crusher 4. The discharge port of the crusher 4 is connected to the crusher 4 through a slag chute. The slag trough is connected to a plate feeder, which conveys the crushed solid steel slag particles to the slag-suppressing tank 5. The slag-suppressing tank 5 is transported to the hoisting outlet of the slag-suppressing mechanism 6 by a slag tank transport vehicle. The slag-suppressing tank 5 containing solid steel slag particles is then hoisted into and out of the slag-suppressing tank mechanism 6 by a lifting device. The top of the annular cooler 1 is connected to the gravity dust collector 8 and the waste heat boiler 9 through a dust removal duct 7. In order to save energy and improve energy utilization, the waste heat boiler 9 is connected to the circulating air pipe 11 through a circulating fan 10. The circulating air pipe 11 is connected to the annular cooler 1. The waste gas for impurity removal and heat exchange is transported to the sealed waste gas collection hood 1-3 to cool the steel slag under the action of the circulating fan 10.

[0012] The processing method of this air-cooled treatment device includes the following steps:

[0013] (1) Spread a 10cm to 20cm thick heat insulation slag on the ring cooler 1. The heat insulation slag is the crushed steel slag tailings after magnetic separation and impurity removal. At the same time, spray high-temperature refractory material on the inner wall of the ring cooler 1.

[0014] (2) The slag pot containing molten steel slag is transported to and installed on the slag pot tilting mechanism 3 by the lifting equipment. When the slag pot tilting mechanism 3 moves to the feed inlet of the ring cooler 1 along with the material conveying mechanism 2, the slag pot tilting mechanism 3 tilts to the side, causing the molten steel slag in the slag pot to fall into the ring cooler 1.

[0015] (3) The molten steel slag rotates synchronously with the ring cooler 1. The unevenly piled steel slag is pushed flat to make the steel slag flat and uniform. After the steel slag is fixed by air cooling in the ring cooler 1 to below 600℃, the ring cooler 1 slides down the curved track to let the steel slag enter the crusher 4 from the discharge port of the ring cooler 1 through the slag chute for crushing. After all the steel slag enters the crusher 4, the ring cooler 1 rises up along the curved track to reset and repeats step (1). The hot waste gas generated in the air cooling heat exchange is collected by the sealed waste gas collection hood 1-3 and enters the gravity dust collector 8 from the dust removal duct 1-5 for dust removal, and then enters the waste heat boiler 9 to produce steam. The steam can be used for power generation or other production.

[0016] (4) The crusher 4 crushes the solid steel slag into steel slag particles with a particle size of less than 50mm. The steel slag particles are successively fed into the slag simmering tank 5 through the slag chute and the plate feeder. The slag simmering tank 5 is then transported to the slag simmering mechanism 6 by the lifting equipment for slag simmering operation.

[0017] Of course, the above description is only a detailed description of the preferred embodiments of the present utility model in conjunction with the accompanying drawings, and is not intended to limit the scope of implementation of the present utility model. All equivalent changes made in accordance with the principles, construction and structure of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A molten steel slag air-cooling treatment device based on an annular cooler, comprising an annular cooler (1), characterized in that: The annular cooler (1) is provided with a feed inlet, which is connected to the conveying mechanism (2). The conveying mechanism (2) is provided with a slag pot tilting mechanism (3) that can move on it. The discharge port of the annular cooler (1) is connected to the crusher (4) through a slag chute. The discharge port of the crusher (4) is connected to a plate feeder through a slag chute. The plate feeder conveys the crushed solid steel slag particles to the slag simmering pot (5). The slag simmering pot (5) is transported to the hoisting outlet of the slag simmering mechanism (6) by a slag pot transport vehicle. The top of the annular cooler (1) is connected to the gravity dust collector (8) and the waste heat boiler (9) through a dust removal duct (7). The waste heat boiler (9) is connected to the circulating air pipe (11) through a circulating fan (10). The circulating air pipe (11) is connected to the annular cooler (1).

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