A device for rapidly reducing free metal oxides in steel slag

Abstract

The utility model discloses a kind of steel slag free metal oxide quick reduction devices, it is related to steel slag processing technical field, it includes storage bin, the device further includes: gas storage steel bottle, fixedly set in the bottom of the storage bin one side, and the bottle mouth of gas storage steel bottle is fixedly set with siphon, the utility model, through the synergy of hydration pretreatment, carbonization and stirring, the problem of long cycle of traditional natural aging method, low efficiency of wet digestion method is solved, atomizing nozzle sprays atomizing water and quickly activates free calcium oxide, free magnesium oxide, electric three-way valve switches gas supply pipeline according to material level, ensure that carbon dioxide accurately contacts steel slag, layered stirring plate and ram continue to turn over steel slag, avoid local reaction blind area, shorten digestion cycle, improve digestion rate, meet the demand of steel enterprise solid waste rapid treatment.

Description

Technical Field

[0001] This utility model relates to the field of steel slag treatment technology, specifically to a device for rapidly reducing free metal oxides in steel slag. Background Technology

[0002] Steel slag is the main solid waste generated during the steel production process. The free calcium oxide and free magnesium oxide contained in steel slag are the core issues restricting its resource utilization. During subsequent storage or application, these two components are prone to hydration reaction with moisture in the air, generating calcium hydroxide and magnesium hydroxide that expand in volume, leading to cracking and pulverization of steel slag products, seriously affecting product quality such as reduced strength of building aggregates and roadbed settlement.

[0003] Currently, the industry's methods for reducing free metal oxides in steel slag include: some methods involve open-air stockpiling of steel slag, relying on the natural environment's moisture and carbon dioxide to slowly decompose free calcium oxide and free magnesium oxide. While this method requires no equipment investment, it is time-consuming, requires a large area, and is significantly affected by weather conditions, such as water accumulation during the rainy season leading to slag loss, and stagnation during the dry season, failing to meet the steel companies' demand for "rapid solid waste treatment." Other methods involve soaking the steel slag in water or spraying large amounts of water to accelerate the hydration reaction of free calcium oxide and free magnesium oxide. While this method shortens the cycle, it has two major drawbacks: first, excessive moisture easily leads to steel slag agglomeration, requiring additional crushing and increasing energy consumption; second, the hydration reaction... The calcium hydroxide and magnesium hydroxide that should be generated are not further stabilized and may still react with carbon dioxide, causing volume changes. Some devices directly react with free calcium oxide and free magnesium oxide in steel slag by introducing carbon dioxide into a sealed container. However, most existing forced carbonization devices adopt a "single-path gas supply" design, that is, nozzles are only set at the bottom or top of the container. When the steel slag level changes (such as half-filled or full-filled), there is a risk of wasting carbon dioxide by spraying gas in vacuum or the accumulation of unreacted steel slag in some areas, which prevents gas from penetrating. At the same time, most devices are not equipped with precise temperature and humidity control and stirring systems, resulting in poor digestion uniformity and failing to meet the requirements of high-specification resource utilization.

[0004] In summary, existing technologies suffer from problems such as "long digestion cycle, low efficiency, and poor uniformity," and there is an urgent need for a device that can achieve "fast, efficient, and stable" reduction of free metal oxides in steel slag. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a device for rapidly reducing free metal oxides in steel slag, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid reduction device for free metal oxides in steel slag, comprising a storage silo, and further comprising:

[0007] A gas storage cylinder is fixedly installed on one side of the bottom of the storage silo, and a siphon tube is fixedly installed at the mouth of the gas storage cylinder;

[0008] An electric three-way valve is installed at one end of the siphon pipe, and the outlet end of the electric three-way valve is respectively flanged with a main air supply pipe and a secondary air supply pipe.

[0009] Multiple main air supply nozzles are symmetrically distributed on the outer surface of the main air supply pipe.

[0010] According to the above technical solution, multiple auxiliary air supply nozzles are symmetrically distributed on the outer surface of the secondary air supply pipe. The multiple main air supply nozzles and multiple auxiliary air supply nozzles are grouped into groups of four. The two groups of main air supply nozzles and the two groups of auxiliary air supply nozzles are respectively set on both sides of the storage silo. The installation height of the multiple main air supply nozzles is at two-thirds of the height of the storage silo, and the installation height of the multiple auxiliary air supply nozzles is at one-third of the height of the storage silo.

[0011] According to the above technical solution, two sealed boxes are fixedly installed on both sides of the storage bin. The main air supply pipe and the secondary air supply pipe are fixedly connected to multiple sealed boxes. The two sets of main air supply nozzles and the two sets of auxiliary air supply nozzles are respectively located inside multiple sealed boxes. The multiple main air supply nozzles and the multiple auxiliary air supply nozzles are located inside multiple sealed boxes to prevent gas leakage.

[0012] According to the above technical solution, nozzle protective covers are fixedly installed on the inner wall of the storage silo at the positions corresponding to multiple sealed boxes. Multiple atomizing nozzles are fixedly installed on the upper side of the storage silo. A water inlet pipe is fixedly installed at one end of the multiple atomizing nozzles. A first conduit is installed on the outer surface of the water inlet pipe. The multiple nozzle protective covers make the multiple main air supply nozzles and multiple auxiliary air supply nozzles separated from the steel slag inside the storage silo, preventing the steel slag from being squeezed and damaged.

[0013] According to the above technical solution, a water pump is installed at one end of the first conduit, and a second conduit is installed at the water inlet of the water pump. One end of the second conduit is connected to an external water source. A hygrometer is installed on one side of the storage silo. By checking the reading of the hygrometer on the storage silo, the external power switch of the water pump is turned on. The external water source enters the water pump through the second conduit and is pressurized. It is then transported to multiple atomizing nozzles through the water inlet pipe and the first conduit to spray atomized water into the storage silo. The sprayed atomized water first undergoes a hydration reaction with the free calcium oxide and free magnesium oxide in the steel slag to generate calcium hydroxide.

[0014] According to the above technical solution, a rotating rod is installed at the center of one side of the storage bin via a bearing. Multiple stirring plates are evenly distributed from top to bottom on the outer surface of the rotating rod. A support rod is fixedly installed at one end of the rotating rod. When the multiple stirring plates rotate, they will agitate the steel slag inside the storage bin, expand the contact area between the steel slag and the reactants, accelerate the reaction rate, break the product layer on the surface of the steel slag particles, and break up the clumps of steel slag, exposing the unreacted harmful components inside.

[0015] According to the above technical solution, multiple tamping rods are fixedly installed on the outer surface of the support rod, and a drive motor is installed on one side of the top of the storage bin. The output shaft of the drive motor is fixedly connected to one side of the rotating rod through a coupling. When the external power switch of the drive motor is turned on, the output shaft of the drive motor drives the rotating rod and the support rod to rotate.

[0016] According to the above technical solution, a discharge pipe is fixedly installed on the side of the storage silo away from the drive motor. A first sealing cover is hinged on one side of the discharge pipe. Multiple tamping rods are located inside the discharge pipe. A silo door is slidably installed on the side of the storage silo near the top. By sliding the silo door at the top of the storage silo, the pretreated steel slag is fed into the storage silo through the silo opening.

[0017] According to the above technical solution, a ventilation pipe is fixedly installed on one side of the top of the storage silo. A round rod is installed at the center of one side of the inner wall of the ventilation pipe via a bearing. A fan blade is fixedly installed at one end of the round rod. An electric heating wire is installed on the inner wall of the ventilation pipe. A transmission rod is installed on one side of the ventilation pipe via a bearing. A first bevel gear is fixedly installed at both ends of the transmission rod. When the power switch of the electric heating wire inside the ventilation pipe is turned on, the electric heating wire is energized and heats up. When the second sealing cover is open, the fan blade rotates to generate airflow, which transports the air heated by the electric heating wire to the inside of the storage silo through the ventilation pipe. The hot air provides a suitable temperature environment for the carbonation reaction of carbon dioxide and calcium hydroxide. During this process, calcium hydroxide reacts with carbon dioxide to produce calcium carbonate and water. At the same time, the incompletely hydrated free magnesium oxide in the steel slag reacts with water to produce magnesium hydroxide, which then reacts with carbon dioxide to produce magnesium carbonate and water. When the second sealing cover is closed, it prevents gas leakage. When it is open, gas can enter through the ventilation port on one side of the ventilation pipe.

[0018] According to the above technical solution, a second bevel gear is fixedly sleeved on the outer surface of the round rod. The two first bevel gears are respectively meshed with the second bevel gear and the third bevel gear. A ventilation port is opened on one side of the ventilation pipe, and a second sealing cover is hinged on one side of the ventilation pipe. As the drive motor continues to run, the third bevel gear on the rotating rod drives the transmission rod to rotate through one of the first bevel gears, which further drives the second bevel gear to rotate, thereby making the round rod and the fan blade rotate synchronously.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. In this utility model, the problems of long cycle of traditional natural aging method and low efficiency of wet digestion method are solved by the synergy of hydration pretreatment, carbonization and stirring. The atomized water sprayed by the atomizing nozzle quickly activates free calcium oxide and free magnesium oxide. The electric three-way valve switches the gas supply pipeline according to the material level to ensure that carbon dioxide accurately contacts the steel slag. The layered stirring plate and tamping rod continuously turn the steel slag to avoid local reaction blind spots, thereby shortening the digestion cycle, improving the digestion rate and meeting the needs of steel enterprises for rapid solid waste treatment.

[0021] 2. In this utility model, main and auxiliary gas supply nozzles are respectively installed at two-thirds and one-third of the height of the storage silo. The electric three-way valve is used to adapt to the full or half-filled silo conditions, avoiding the waste of carbon dioxide by empty spraying and improving the gas utilization rate.

[0022] 3. In this utility model, the temperature is maintained in the optimal range for carbonization reaction by a temperature control system composed of a ventilation pipe, heating wire and fan blade, which solves the problem of uneven reaction caused by uncontrolled temperature and humidity in traditional devices.

[0023] 4. In this utility model, the stirring and ventilation system are linked by a drive motor. When the rotating rod rotates, the fan blades are driven to run synchronously through the first bevel gear, the second bevel gear and the third bevel gear. There is no need to configure a motor for the ventilation system, which reduces energy consumption. When discharging, the stirring plate and the tamping rod continuously loosen the steel slag to avoid pipe blockage. No manual cleaning is required, which meets the design requirements of "high efficiency, low consumption and convenience" for industrial equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a side view of the structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of this utility model without the sealing box;

[0027] Figure 4 This is a cross-sectional view of the material storage silo in this utility model;

[0028] Figure 5 This is a cross-sectional view of the discharge pipe in this utility model.

[0029] Figure 6 This is a cross-sectional view of the ventilation duct in this utility model;

[0030] Figure 7 This utility model Figure 2 Enlarged view of point A in the middle;

[0031] Figure 8 This utility model Figure 5 Enlarged view of section B in the middle.

[0032] The meanings of the labels in the diagram are as follows:

[0033] 1. Storage silo; 2. Gas cylinder; 201. Siphon pipe; 202. Electric three-way valve; 203. Main gas supply pipe; 204. Main gas supply nozzle; 205. Secondary gas supply pipe; 206. Auxiliary gas supply nozzle; 207. Sealing box; 208. Nozzle protective cover; 209. Atomizing nozzle; 210. Water inlet pipe; 211. First conduit; 212. Water pump; 213. Second conduit; 214. Hygrometer; 3 301. Rotating rod; 302. Stirring plate; 303. Support rod; 304. Tamping rod; 305. Discharge pipe; 306. First sealing cover; 307. Bin door; 308. Drive motor; 409. Ventilation pipe; 4001. Round rod; 401. Fan blade; 402. Heating wire; 403. Transmission rod; 404. First bevel gear; 405. Second bevel gear; 406. Third bevel gear; 407. Second sealing cover. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] like Figures 1 to 8 As shown, this utility model provides a rapid reduction device for free metal oxides in steel slag, which includes a storage silo 1. The device further includes: a gas storage cylinder 2, which is fixedly installed on one side of the bottom of the storage silo 1, and a siphon pipe 201 is fixedly installed at the mouth of the gas storage cylinder 2; an electric three-way valve 202, which is installed at one end of the siphon pipe 201, and a main gas supply pipe 203 and a secondary gas supply pipe 205 are respectively flanged at the outlet end of the electric three-way valve 202; and multiple main gas supply nozzles 204, which are symmetrically distributed on the main gas supply nozzles 204. On the outer surface of the air supply pipe 203 and the outer surface of the secondary air supply pipe 205, there are multiple auxiliary air supply nozzles 206 symmetrically distributed. The multiple main air supply nozzles 204 and the multiple auxiliary air supply nozzles 206 are grouped into groups of four. The two groups of main air supply nozzles 204 and the two groups of auxiliary air supply nozzles 206 are respectively set on both sides of the storage silo 1. The installation height of the multiple main air supply nozzles 204 is at two-thirds of the height of the storage silo 1, and the installation height of the multiple auxiliary air supply nozzles 206 is at one-third of the height of the storage silo 1.

[0036] When in use, open the valve of the gas cylinder 2. Carbon dioxide is discharged from the gas cylinder 2 through the siphon pipe 201 and enters the inlet of the electric three-way valve 202. If the storage silo 1 is full, that is, the steel slag is greater than or equal to two-thirds of the silo height, the electric three-way valve 202 is connected to the main gas supply pipe 203, and the carbon dioxide is transported into the main gas supply pipe 203 and delivered to the storage silo 1 at two-thirds of the height, and sprayed out from multiple main gas supply nozzles 204. If it is half full, that is, the steel slag is less than or equal to one-third of the silo height, the electric three-way valve 202 switches to the secondary gas supply pipe 205, and the carbon dioxide is sprayed out through multiple auxiliary gas supply nozzles 206.

[0037] Please see Figures 1 to 8 In one embodiment, two sealed boxes 207 are fixedly installed on both sides of the storage bin 1. The main air supply pipe 203 and the secondary air supply pipe 205 are fixedly connected to the multiple sealed boxes 207. The two sets of main air supply nozzles 204 and the two sets of auxiliary air supply nozzles 206 are respectively located inside the multiple sealed boxes 207. The multiple main air supply nozzles 204 and the multiple auxiliary air supply nozzles 206 are located inside the multiple sealed boxes 207 to prevent gas leakage.

[0038] Please see Figures 1 to 8 In one embodiment, nozzle protective covers 208 are fixedly installed on the inner wall of the storage silo 1 at the positions corresponding to the multiple sealed boxes 207. Multiple atomizing nozzles 209 are fixedly installed on the upper side of the storage silo 1. A water inlet pipe 210 is fixedly installed at one end of the multiple atomizing nozzles 209. A first conduit 211 is installed on the outer surface of the water inlet pipe 210. The multiple nozzle protective covers 208 make the multiple main air supply nozzles 204 and multiple auxiliary air supply nozzles 206 separate from the steel slag inside the storage silo 1, preventing the steel slag from being squeezed and damaged.

[0039] Please see Figures 1 to 8 In one embodiment, a water pump 212 is installed at one end of the first conduit 211, and a second conduit 213 is installed at the water inlet of the water pump 212. One end of the second conduit 213 is connected to an external water source. A hygrometer 214 is installed on one side of the storage silo 1. If the humidity is less than 65%RH, the external power switch of the water pump 212 is turned on. The external water source enters the water pump 212 through the second conduit 213 and is pressurized. It is then transported to multiple atomizing nozzles 209 through the water inlet pipe 210 and the first conduit 211 to spray atomized water into the storage silo 1. The sprayed atomized water first undergoes a hydration reaction with the free calcium oxide and free magnesium oxide in the steel slag to generate calcium hydroxide. When the hygrometer 214 shows that the humidity reaches 65%-75%RH, the switch of the water pump 212 is turned off.

[0040] Please see Figures 1 to 8In one embodiment, a rotating rod 3 is provided at the center of one side of the storage bin 1 via a bearing. Multiple stirring plates 301 are evenly distributed from top to bottom on the outer surface of the rotating rod 3. A support rod 302 is fixedly provided at one end of the rotating rod 3. When the multiple stirring plates 301 rotate, they will agitate the steel slag inside the storage bin 1, expand the contact area between the steel slag and the reactants, accelerate the reaction rate, break the product layer on the surface of the steel slag particles, and break up the clumps of steel slag, exposing the unreacted harmful components inside.

[0041] Please see Figures 1 to 8 In one embodiment, a plurality of tamping rods 303 are fixedly provided on the outer surface of the support rod 302. A drive motor 307 is installed on one side of the top of the storage bin 1. The output shaft of the drive motor 307 is fixedly connected to one side of the rotating rod 3 through a coupling. When the external power switch of the drive motor 307 is turned on, the output shaft of the drive motor 307 drives the rotating rod 3 and the support rod 302 to rotate.

[0042] Please see Figures 1 to 8 In one embodiment, a discharge pipe 304 is fixedly installed on the side of the storage silo 1 away from the drive motor 307. A first sealing cover 305 is hinged on one side of the discharge pipe 304. Multiple tamping rods 303 are located inside the discharge pipe 304. A silo door 306 is slidably installed on the side of the storage silo 1 near the top. By sliding the silo door 306 at the top of the storage silo 1, the pretreated steel slag is fed into the storage silo 1 through the silo opening.

[0043] Please see Figures 1 to 8 In one embodiment, a ventilation pipe 4 is fixedly installed on one side of the top of the storage silo 1. A round rod 401 is installed at the center of one side of the inner wall of the ventilation pipe 4 via a bearing. A fan blade 402 is fixedly installed at one end of the round rod 401. An electric heating wire 403 is installed on the inner wall of the ventilation pipe 4. A transmission rod 404 is installed on one side of the ventilation pipe 4 via a bearing. A first bevel gear 405 is fixedly installed at both ends of the transmission rod 404. When the power switch of the electric heating wire 403 inside the ventilation pipe 4 is turned on, the electric heating wire 403 is energized and heats up, and the second sealing cover 408 is in the open state. When in operation, the fan blades 402 rotate to generate airflow, which transports the air heated by the heating wire 403 to the inside of the storage silo 1 through the ventilation pipe 4. The hot air provides a suitable temperature environment for the carbonation reaction of carbon dioxide and calcium hydroxide. During this process, calcium hydroxide reacts with carbon dioxide to produce calcium carbonate and water. At the same time, the incompletely hydrated free magnesium oxide in the steel slag reacts with water to produce magnesium hydroxide, which then reacts with carbon dioxide to produce magnesium carbonate and water. When the second sealing cover 408 is closed, it prevents gas leakage. When it is opened, the gas can enter through the ventilation opening on one side of the ventilation pipe 4.

[0044] Please see Figures 1 to 8In one embodiment, a second bevel gear 406 is fixedly sleeved on the outer surface of the round rod 401. Two first bevel gears 405 are respectively meshed with the second bevel gear 406 and the third bevel gear 407. A ventilation port is opened on one side of the ventilation pipe 4, and a second sealing cover 408 is hinged on one side of the ventilation pipe 4. As the drive motor 307 continues to operate, the third bevel gear 407 on the rotating rod 3 drives the transmission rod 404 to rotate through one of the first bevel gears 405, which further drives the second bevel gear 406 to rotate through the other first bevel gear 405, thereby causing the round rod 401 and the fan blade 402 to rotate synchronously.

[0045] The working principle and usage process of this utility model are as follows: When processing steel slag, the operator slides the silo door 306 at the top of the storage silo 1 and puts the pre-treated steel slag into the interior of the storage silo 1 through the silo opening. When the steel slag reaches two-thirds or one-third of the silo height, the feeding is stopped and the silo door 306 is closed.

[0046] When the steel slag is fed into the storage silo 1, the external power switch of the drive motor 307 is turned on, and the output shaft of the drive motor 307 drives the rotating rod 3 and the support rod 302 to rotate, which in turn causes multiple stirring plates 301 and multiple tamping rods 303 to rotate. The multiple stirring plates 301 stir the steel slag inside the storage silo 1, and the multiple tamping rods 303 stir the steel slag inside the discharge pipe 304, which expands the contact area between the steel slag and the reactants, accelerates the reaction rate, breaks up the product layer on the surface of the steel slag particles, and breaks up the clumps of steel slag, exposing the unreacted harmful components inside.

[0047] Check the reading of the hygrometer 214 on the storage silo 1. If the humidity is less than 65%RH, turn on the external power switch of the water pump 212. The external water source enters the water pump 212 through the second conduit 213 and is pressurized. It is then transported to multiple atomizing nozzles 209 through the water inlet pipe 210 and the first conduit 211 to spray atomized water into the storage silo 1. The sprayed atomized water first undergoes a hydration reaction with the free calcium oxide and free magnesium oxide in the steel slag to generate calcium hydroxide. When the hygrometer 214 shows that the humidity reaches 65%-75%RH, turn off the switch of the water pump 212.

[0048] At this time, the valve of the gas storage cylinder 2 is opened. The gas storage cylinder 2 is filled with carbon dioxide. The carbon dioxide is discharged from the gas storage cylinder 2 through the siphon pipe 201 and enters the inlet of the electric three-way valve 202. If the storage silo 1 is full, that is, the steel slag is greater than or equal to two-thirds of the silo height, the electric three-way valve 202 is connected to the main gas supply pipe 203, and the carbon dioxide is transported into the main gas supply pipe 203. It is transported to the two-thirds height of the storage silo and sprayed out from multiple main gas supply nozzles 204. If it is half full, that is, the steel slag is less than or equal to one-third of the silo height, the electric three-way valve 202 switches to the secondary gas supply pipe 205, and the carbon dioxide is sprayed out through multiple auxiliary gas supply nozzles 206. The multiple main gas supply nozzles 204 and multiple auxiliary gas supply nozzles 206 are located inside multiple sealed boxes 207 to prevent gas leakage. Multiple nozzle protective covers 208 make the multiple main gas supply nozzles 204 and multiple auxiliary gas supply nozzles 206 separated from the steel slag inside the storage silo 1 to prevent the steel slag from being squeezed and damaged.

[0049] Once the carbon dioxide supply begins, the operator must simultaneously monitor the temperature inside the storage silo 1. If the temperature is below 40°C, turn on the power switch of the heating wire 403 inside the ventilation pipe 4. Simultaneously, as the drive motor 307 continues to operate, the third bevel gear 407 on the rotating rod 3 drives the transmission rod 404 to rotate through one of the first bevel gears 405, which in turn drives the second bevel gear 406 to rotate, thereby causing the round rod 401 and the fan blade 402 to rotate synchronously. At this time, the second sealing cover 408 is in the open state, and the fan blade 402 rotates to generate airflow, which transports the air heated by the heating wire 403 to the inside of the storage silo 1 through the ventilation pipe 4. The hot air provides a suitable temperature environment for the carbonation reaction of carbon dioxide and calcium hydroxide. During this process, calcium hydroxide reacts with carbon dioxide to produce calcium carbonate and water. At the same time, the incompletely hydrated free magnesium oxide in the steel slag reacts with water to produce magnesium hydroxide, which then reacts with carbon dioxide to produce magnesium carbonate and water.

[0050] After confirming that the steel slag has met the standards (i.e., the free calcium oxide content in the steel slag is less than or equal to 3%), the discharge stage begins. The operator first closes the valve of the gas storage cylinder 2, keeps the drive motor 307 and water pump 212 running for five minutes, and continues to stir to loosen the steel slag. At the same time, a small amount of atomized water is added to prevent steel slag dust from flying. Then, the power to the water pump 212 is turned off, and the first sealing cover 305 on the discharge pipe 304 is opened. As the rotating rod 3 continues to rotate, multiple stirring plates 301 loosen the steel slag at the bottom of the bin. At the same time, the support rod 302 drives multiple tamping rods 303 to stir the steel slag in the discharge pipe 304 to prevent clumping and blockage, thus completing the steel slag treatment.

[0051] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for rapidly reducing free metal oxides in steel slag, comprising a storage silo (1), characterized in that, The device also includes: A gas cylinder (2) is fixedly installed on one side of the bottom of the storage bin (1), and a siphon tube (201) is fixedly installed at the mouth of the gas cylinder (2); An electric three-way valve (202) is installed at one end of the siphon pipe (201), and the outlet end of the electric three-way valve (202) is respectively flanged with a main air supply pipe (203) and a secondary air supply pipe (205); Multiple main air supply nozzles (204) are symmetrically distributed on the outer surface of the main air supply pipe (203).

2. The rapid reduction device for free metal oxides in steel slag according to claim 1, characterized in that: Multiple auxiliary air supply nozzles (206) are symmetrically distributed on the outer surface of the secondary air supply pipe (205). The multiple main air supply nozzles (204) and the multiple auxiliary air supply nozzles (206) are all grouped in groups of four. The two groups of main air supply nozzles (204) and the two groups of auxiliary air supply nozzles (206) are respectively set on both sides of the storage silo (1). The installation height of the multiple main air supply nozzles (204) is at two-thirds of the height of the storage silo (1), and the installation height of the multiple auxiliary air supply nozzles (206) is at one-third of the height of the storage silo (1).

3. The rapid reduction device for free metal oxides in steel slag according to claim 2, characterized in that: Two sealed boxes (207) are fixedly installed on both sides of the storage bin (1). The main air supply pipe (203) and the secondary air supply pipe (205) are fixedly connected to multiple sealed boxes (207), and two sets of main air supply nozzles (204) and two sets of auxiliary air supply nozzles (206) are respectively located inside multiple sealed boxes (207).

4. The rapid reduction device for free metal oxides in steel slag according to claim 3, characterized in that: The inner wall of the storage silo (1) is fixedly provided with nozzle protective covers (208) at the positions corresponding to the multiple sealed boxes (207). Multiple atomizing nozzles (209) are fixedly provided on the upper side of the storage silo (1). A water inlet pipe (210) is fixedly provided at one end of the multiple atomizing nozzles (209). A first conduit (211) is installed on the outer surface of the water inlet pipe (210).

5. The rapid reduction device for free metal oxides in steel slag according to claim 4, characterized in that: A water pump (212) is installed at one end of the first conduit (211), and a second conduit (213) is installed at the water inlet end of the water pump (212). One end of the second conduit (213) is connected to an external water source, and a hygrometer (214) is installed on one side of the storage bin (1).

6. The rapid reduction device for free metal oxides in steel slag according to claim 1, characterized in that: A rotating rod (3) is installed at the center of one side of the storage bin (1) via a bearing. Multiple stirring plates (301) are evenly distributed on the outer surface of the rotating rod (3) from top to bottom. A support rod (302) is fixedly installed at one end of the rotating rod (3).

7. The rapid reduction device for free metal oxides in steel slag according to claim 6, characterized in that: Multiple tamping rods (303) are fixedly installed on the outer surface of the support rod (302). A drive motor (307) is installed on one side of the top of the storage bin (1). The output shaft of the drive motor (307) is fixedly connected to one side of the rotating rod (3) through a coupling.

8. The rapid reduction device for free metal oxides in steel slag according to claim 7, characterized in that: The storage bin (1) is fixedly provided with a discharge pipe (304) on the side away from the drive motor (307). A first sealing cover (305) is hinged on one side of the discharge pipe (304). Multiple tamping rods (303) are located inside the discharge pipe (304). A bin door (306) is slidably provided on the side of the storage bin (1) near the top.

9. The rapid reduction device for free metal oxides in steel slag according to claim 6, characterized in that: A ventilation pipe (4) is fixedly installed on one side of the top of the storage silo (1). A round rod (401) is installed at the center of one side of the inner wall of the ventilation pipe (4) via a bearing. A fan blade (402) is fixedly installed at one end of the round rod (401). An electric heating wire (403) is installed on the inner wall of the ventilation pipe (4). A transmission rod (404) is installed on one side of the ventilation pipe (4) via a bearing. A first bevel gear (405) is fixedly installed at both ends of the transmission rod (404).

10. The rapid reduction device for free metal oxides in steel slag according to claim 9, characterized in that: A second bevel gear (406) is fixedly sleeved on the outer surface of the round rod (401), and a third bevel gear (407) is fixedly sleeved on the outer surface of the rotating rod (3). The two first bevel gears (405) are respectively meshed with the second bevel gear (406) and the third bevel gear (407). A ventilation opening is provided on one side of the ventilation pipe (4), and a second sealing cover (408) is hinged on one side of the ventilation pipe (4).

Images