Device for mineralizing and solidifying carbon dioxide by using steel slag

Abstract

The device comprises a support, a box body is arranged on the support, a feeding port is formed in the upper side of one end in the length direction of the box body, a discharging port is formed in the lower side of the other end in the length direction of the box body, a first conveying belt is arranged in the box body in the length direction of the box body, and one end of the first conveying belt is located above the discharging port; a water spraying pipe is arranged in the box body in the width direction of the box body and located above the first conveying belt, a plurality of spraying heads are arranged on the water spraying pipe in the length direction of the water spraying pipe, and a main air spraying pipe is arranged in the box body in the width direction of the box body and located above the first conveying belt. A plurality of air injection branch pipes are arranged on the air injection main pipe in the length direction of the air injection main pipe. The conveying belt is arranged in the box body, steel slag is conveyed from one end of the box body to the other end of the box body through the conveying belt, water and carbon dioxide are sprayed to the steel slag in the conveying process, the steel slag solidifies the carbon dioxide, and CO2 emission reduction and resource utilization are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of slag treatment and relates to a device for solidifying carbon dioxide by mineralizing steel slag. Background Art

[0002] my country is a major steel producer. Steel slag is a solid waste generated during the steelmaking process. The output is huge, with an annual output of over 100 million tons. At present, my country's steel slag is mainly used in silicate cement and roadbed materials, and its comprehensive resource utilization rate is less than 25%. With the official release of GB175-2023 "General Portland Cement", steel slag can no longer be used as a mixed material for silicate cement, which will have an impact on the resource utilization of steel slag and the ecological environment. Therefore, it is urgent to increase the mineralization rate of steel slag and expand the resource application of steel slag.

[0003] The chemical composition of steel slag is mainly oxides of elements such as calcium, magnesium, aluminum, iron and silicon, and the main mineral components are dicalcium silicate, tricalcium silicate, calcium forsterite and RO phase. A large amount of calcium and magnesium oxides in steel slag can be used as a carrier for capturing CO2, and have higher reactivity and inherent alkalinity than natural minerals, making them more suitable for solidifying CO2. Using steel slag for mineralization and solidification of CO2 can not only reduce the emission pressure of CO2, but also improve the resource utilization rate of steel slag. The mineralized steel slag has a stable structure and can be better used in building materials and roadbed materials. Summary of the invention

[0004] The utility model aims to provide a device for solidifying carbon dioxide by mineralizing steel slag in view of the problems existing in the prior art.

[0005] To this end, the utility model adopts the following technical solutions:

[0006] A device for solidifying carbon dioxide by mineralizing slag comprises a bracket, a box body is provided on the bracket, a feed port is provided on the upper side of one end of the box body in the length direction, and a discharge port is provided on the lower side of the other end, a first conveyor belt is provided in the box body along the length direction of the box body, one end of the first conveyor belt is located above the discharge port, a water spray pipe is provided in the box body along the width direction of the box body, the water spray pipe is located above the first conveyor belt, a plurality of nozzles are provided on the water spray pipe along the length direction of the water spray pipe, a jet main pipe is provided in the box body along the width direction of the box body, the jet main pipe is located above the first conveyor belt, and a plurality of jet branch pipes are provided on the jet main pipe along the length direction of the jet main pipe.

[0007] Furthermore, a second conveyor belt for feeding materials into the feed port is provided on the upper side of the box body, and a crusher for crushing steel slag is provided at one end of the second conveyor belt away from the feed port.

[0008] Furthermore, an inclined material leveling plate is provided at the feed inlet, a vibration motor is provided at the bottom of the material leveling plate, and a baffle is provided on each side of the length direction of the material leveling plate.

[0009] Furthermore, the jet main pipe is located between the water spray pipe and the material delivery port.

[0010] Furthermore, the water spray pipe is connected to a water delivery pipe, the water delivery pipe passes through the top of the box body, and a water delivery valve is provided on the water delivery pipe.

[0011] Furthermore, the jet main pipe is connected to an air supply pipe, the air supply pipe is connected to an air storage tank, and an air supply valve is provided on the air supply pipe.

[0012] Furthermore, a collecting box is provided at the lower side of the discharge port.

[0013] The beneficial effects of the utility model are as follows: a conveyor belt is arranged in the box body, and the steel slag is conveyed from one end of the box body to the other end through the conveyor belt; water and carbon dioxide are sprayed on the steel slag during the conveying process, so that the steel slag solidifies the carbon dioxide, thereby achieving CO2 emission reduction and resource utilization, increasing the stability of the treated steel slag, and making the steel slag usable in the fields of building materials and roadbed materials; the steel slag is directly discharged through the discharge port after the carbon dioxide is solidified, and the whole process is efficient and fast; the structure is simple and the method of use is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic front view of the structure of the present invention;

[0015] Figure 2 for Figure 1 Sectional view along AA direction;

[0016] In the figure, 1- bracket, 2- box body, 3- feed port, 4- discharge port, 5- first conveyor belt, 6- second conveyor belt, 7- crusher, 8- material leveling plate, 9- vibration motor, 10- baffle, 11- water spray pipe, 12- nozzle, 13- water pipe, 14- water valve, 15- jet main pipe, 16- jet branch pipe, 17- air pipe, 18- air storage tank, 19- air valve, 20- aggregate box. DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with the accompanying drawings:

[0018] like Figure 1 and 2As shown, a device for solidifying carbon dioxide by mineralization of steel slag comprises a support 1, a box body 2 is arranged on the support 1, a feed port 3 is arranged on the upper side of one end of the box body 2 in the length direction, and a discharge port 4 is arranged on the lower side of the other end, the steel slag can enter the box body 2 through the feed port 3 and be discharged through the discharge port 4, a first conveyor belt 5 is arranged in the box body 2 along the length direction of the box body 2, the first conveyor belt 5 can adopt the existing conventional conveyor belt, one end of the first conveyor belt 5 is located above the discharge port 5, the steel slag can be transported in the box body 2 through the first conveyor belt 5, and the upper side of the box body 2 is provided with a conveyor belt for conveying the steel slag into the feed port 3 A second conveyor belt 6 is provided, and a crusher 7 for crushing steel slag is provided at one end of the second conveyor belt 6 away from the feed port 3. The crusher 7 can be an existing conventional crusher. After the steel slag is crushed, the contact area between the steel slag and the carbon dioxide gas is increased to improve the curing effect. An inclined leveling plate 8 is provided at the feed port 3. A vibration motor 9 is provided at the bottom of the leveling plate 8. A baffle 10 is provided on both sides of the length direction of the leveling plate 8. After the steel slag conveyed by the second conveyor belt 6 enters the feed port 3, it is transported to the first conveyor belt 5 through the leveling plate 8. The vibration of the vibration motor 9 can make the crushed steel slag The slag on the first conveyor belt 5 is evenly scattered on one end of the first conveyor belt 5 and moves with the first conveyor belt 5. A water spray pipe 11 is provided in the box body 2 along the width direction of the box body 2. The water spray pipe 11 is located above the first conveyor belt 5. A plurality of nozzles 12 are provided on the water spray pipe 11 along the length direction of the water spray pipe 11. Water can be sprayed to the slag on the first conveyor belt 5 through the nozzles 12. The water spray pipe 11 is connected to a water delivery pipe 13. The water delivery pipe 13 passes through the top of the box body 2. A water delivery valve 14 is provided on the water delivery pipe 13. The water delivery pipe 13 is connected to a water source. Water is delivered to the water spray pipe 11 through the water delivery pipe 13. The box body 2 is connected to the width direction of the box body 2. A jet main pipe 15 is provided in the direction of the first conveyor belt 5, the jet main pipe 15 is located above the first conveyor belt 5 and between the water spray pipe 11 and the feed port 4, a plurality of jet branch pipes 16 are provided along the length direction of the carbon dioxide gas 15, the jet branch pipes 16 can uniformly spray carbon dioxide gas onto the steel slag sprayed with water on the first conveyor belt 5, so that the steel slag and the carbon dioxide gas are mixed to solidify the carbon dioxide gas, the jet main pipe 15 is connected to a gas delivery pipe 17, the gas delivery pipe 17 is connected to a gas storage tank 18 for storing carbon dioxide gas, and a gas delivery valve 19 is provided on the gas delivery pipe 17.

[0019] A collection box 20 is provided at the lower side of the discharge port 4 . The steel slag after reacting with carbon dioxide is transported to the discharge port 4 through the first conveyor belt 5 , discharged from the box body 2 , and collected by the collection box 20 .

[0020] The usage of the utility model is as follows:

[0021] The receiver can put the steel slag into the crusher 7 for crushing, and then the crushed steel slag is transported to the feed port 3 through the second conveyor belt 6. After the steel slag enters the feed port 3, it is transported to the first conveyor belt 5 through the screed plate 8. At this time, the vibration motor 9 makes the steel slag on the screed plate 8 vibrate, so that the crushed steel slag can be evenly scattered on the first conveyor belt 5, and the steel slag is moved to one end of the discharge port of the box body 2 through the first conveyor belt 5. In this process, the water pipe 13 conveys water to the water spray pipe 11, and then the water is sprayed to the steel slag on the first conveyor belt 5 through the nozzle 12 to wet the steel slag. After being wetted, the steel slag continues to move on the first conveyor belt 5, and then the gas pipe 17 transfers the gas in the gas storage tank 18. The carbon dioxide gas is transported to the jet main pipe 15, and finally sprayed onto the wetted steel slag through the jet branch pipe 16. The steel slag reacts to generate CaCO3 solid attached to the steel slag. Finally, the steel slag is discharged from the box body 2 through the discharge port 4 and collected by the collecting box 20. In order to allow the steel slag to fully absorb the carbon dioxide, the moving speed of the first conveyor belt 5 can be reduced. The device can achieve the purpose of carbon fixation, realize CO2 emission reduction and resource utilization, increase the stability of the treated steel slag, and reduce the problems of volume expansion and cracking of steel slag tailings products during use. It expands the high value-added application of steel slag as industrial solid waste, and can be better used in the fields of building materials and roadbed materials.

Claims

1. A device for solidifying carbon dioxide by mineralization of steel slag, characterized in that: The invention comprises a support (1), wherein a box body (2) is provided on the support (1), a feed port (3) is provided on the upper side of one end of the box body (2) in the longitudinal direction, and a discharge port (4) is provided on the lower side of the other end, a first conveyor belt (5) is provided inside the box body (2) along the longitudinal direction of the box body (2), one end of the first conveyor belt (5) is located above the discharge port (4), a water spray pipe (11) is provided inside the box body (2) along the width direction of the box body (2), the water spray pipe (11) is located above the first conveyor belt (5), a plurality of spray heads (12) are provided on the water spray pipe (11) along the length direction of the water spray pipe (11), an air jet main pipe (15) is provided inside the box body (2) along the width direction of the box body (2), the air jet main pipe (15) is located above the first conveyor belt (5), and a plurality of air jet branch pipes (16) are provided on the air jet main pipe (15) along the length direction of the air jet main pipe (15).

2. The device for solidifying carbon dioxide by mineralization of steel slag according to claim 1, characterized in that: A second conveyor belt (6) for conveying materials into the feed port (3) is provided on the upper side of the box body (2); a crusher (7) for crushing steel slag is provided at one end of the second conveyor belt (6) away from the feed port (3).

3. The device for solidifying carbon dioxide by mineralization of steel slag according to claim 1, characterized in that: The feed inlet (3) is provided with an inclined material leveling plate (8), a vibration motor (9) is provided at the bottom of the material leveling plate (8), and a baffle (10) is provided on each side of the length direction of the material leveling plate (8).

4. The device for solidifying carbon dioxide by mineralization of steel slag according to claim 1, characterized in that: The jet main pipe (15) is located between the water jet pipe (11) and the material delivery port.

5. The device for solidifying carbon dioxide by mineralization of steel slag according to claim 1, characterized in that: The water spray pipe (11) is connected to a water delivery pipe (13), the water delivery pipe (13) passes through the top of the box body (2), and a water delivery valve (14) is provided on the water delivery pipe (13).

6. The device for solidifying carbon dioxide by mineralization of steel slag according to claim 1, characterized in that: The jet main pipe (15) is connected to an air delivery pipe (17), the air delivery pipe (17) is connected to an air storage tank (18), and an air delivery valve (19) is provided on the air delivery pipe (17).

7. The device for solidifying carbon dioxide by mineralization of steel slag according to claim 1, characterized in that: A material collection box (20) is provided at the lower side of the material discharge port (4).

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