Device and method for preparing carbon by using waste heat of steel slag, carbonized material and carbonized product

Abstract

The invention relates to equipment and a method for preparing carbon from waste heat of steel slag, a carbonized material and a carbonized product. The steel slag waste heat carbonization equipment comprises at least one carbonization device, and the carbonization device comprises a heat storage chamber and a carbonization chamber; the heat storage chamber is used for containing steel slag, and the carbonization chamber surrounds the outer side of the side wall of the heat storage chamber. The carbonization chamber in the carbonization device is arranged on the outer side of the side wall of the heat storage chamber in a surrounding manner; when a biomass material to be carbonized is placed in the carbonization chamber and high-temperature steel slag is placed in the heat storage chamber, heat of the steel slag in the heat storage chamber is conducted to the periphery, so that the biomass material in the carbonization chamber is heated and carbonized; the biomass in the carbonization chamber is heated more uniformly, and the carbonization effect is more uniform; the heat conduction of heat of the heat storage chamber to surrounding air is reduced to a certain extent, a certain heat preservation effect is achieved on the heat storage chamber, more heat is used for carbonizing biomass, the utilization rate of the waste heat of the steel slag is further improved, and the carbon making efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel slag waste heat recovery and utilization, and in particular to a steel slag waste heat carbonization device, method, carbonized material, and carbonized product. Background Art

[0002] There are many types of steel slag, mainly including converter slag, refined slag, casting slag, ladle slag, hot metal desulfurization slag, dephosphorization slag, desiliconization slag, etc. Taking the traditional long-process steel preparation process as an example, converter slag accounts for about 80% of its steel slag. After the converter taps the steel, a part of the converter slag is poured out, and the remaining slag is splashed to protect the furnace. Generally, the temperature of this part of the poured converter slag is ≥1500℃. The treatment method for the converter slag is generally hot stewing, hot pouring, drum, wind quenching, water quenching and other processes. During the treatment process, only a small part of the heat of the steel slag is recovered through the heat exchanger for power generation, while most of it is naturally cooled and not fully utilized. Summary of the invention

[0003] Based on this, it is necessary to provide steel slag waste heat carbonization equipment, methods, carbonized materials, and carbonized products that can improve the heat utilization rate of steel slag.

[0004] A first aspect of the present application provides a steel slag waste heat carbonization equipment, comprising at least one carbonization device, wherein the carbonization device comprises a heat storage chamber and a carbonization chamber; the heat storage chamber is used to place steel slag, and the carbonization chamber is arranged around the outer side of the side wall of the heat storage chamber.

[0005] The above-mentioned steel slag waste heat charcoal making equipment includes at least one charcoal making device, in which the carbonization chamber is arranged around the outside of the side wall of the heat storage chamber; when the biomass material to be carbonized is placed in the carbonization chamber and the high-temperature steel slag is placed in the heat storage chamber, the heat of the steel slag in the heat storage chamber is transferred to the surroundings, so that the biomass material in the carbonization chamber is heated and carbonized; further, the carbonization chamber is arranged around the outside of the heat storage chamber, so that the biomass in the carbonization chamber is heated more evenly and the carbonization effect is more uniform; further, the carbonization chamber is arranged around the outside of the side wall of the heat storage chamber, which can reduce the heat conduction of the heat storage chamber to the surrounding air to a certain extent, has a certain thermal insulation effect on the heat storage chamber, and makes more heat used for the carbonization of the biomass, further improves the utilization rate of the steel slag waste heat, and is conducive to improving the charcoal making efficiency.

[0006] In some embodiments, the heat storage chamber and the carbonization chamber are provided with a common wall and are separated by the common wall.

[0007] In some embodiments, the steel slag waste heat carbonization equipment meets at least one of the following conditions:

[0008] (1) The thickness of the common wall is 15 mm to 20 mm;

[0009] (2) The common wall is made of steel.

[0010] In some embodiments, the steel slag waste heat carbonization equipment meets at least one of the following conditions:

[0011] (1) The thickness of the outer wall of the carbonization chamber is 8 mm to 15 mm;

[0012] (2) The ratio of the volume of the heat storage chamber to the volume of the carbonization chamber is (3-5):1;

[0013] (3) The cross section of the heat storage chamber is a square; the cross section of the carbonization chamber is a square ring;

[0014] (4) The inner cavity height of the heat storage chamber is greater than or equal to the inner cavity height of the carbonization chamber.

[0015] In some embodiments, the heat storage chamber and the carbonization chamber are both structures with openings at both ends; the carbon making device further includes a heat preservation cover, a first valve and a second valve;

[0016] The heat preservation cover is detachably arranged at the top openings of the main bodies of the heat storage chamber and the carbonization chamber; the first valve is arranged at the lower opening of the main body of the heat storage chamber, and the second valve is arranged at the lower opening of the main body of the carbonization chamber.

[0017] In some embodiments, the steel slag waste heat carbon making equipment meets at least one of the following conditions:

[0018] (1) The heat-insulating cover is provided with a smoke exhaust duct connected to the carbonization chamber;

[0019] (2) The lower opening of the heat storage chamber body is located below the lower opening of the carbonization chamber body.

[0020] In some embodiments, the carbon making device further comprises a shielding plate, wherein the shielding plate is arranged on the outer side of the side wall of the heat storage chamber, and the shielding plate is located below the opening at the lower end of the carbonization chamber body.

[0021] The second aspect of the present application provides a method for making carbon using waste heat from steel slag, the method using the equipment for making carbon using waste heat from steel slag as described in the first aspect to make carbon, comprising the following steps:

[0022] Steel slag is placed in the heat storage chamber, and biomass is added into the carbonization chamber for carbonization.

[0023] The third aspect of the present application provides a carbonized material, which is prepared using the method described in the second aspect.

[0024] A fourth aspect of the present application provides a carbonized product, which includes the carbonized material described in the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application, and ordinary technicians in this field can obtain other drawings based on the disclosed drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of a steel slag waste heat carbon making device provided in one embodiment of the present application.

[0027] Figure 2 for Figure 1 A schematic diagram of the structure of one of the carbon-making devices.

[0028] Figure 3 for Figure 2 Schematic diagram of the structure of the heat storage chamber in the charcoal making device.

[0029] Figure 4 This is a top view of a slag waste heat carbon making device provided in one embodiment of the present application.

[0030] Reference numerals:

[0031] 1. Insulation cover; 2. Heat storage chamber; 21. Upper part; 22. Middle part; 23. Lower part; 3. Carbonization chamber; 4. Smoke exhaust duct; 5. Second valve; 6. Baffle plate; 7. First valve; 8. Main smoke duct; 9. Connecting pipe; 10. Biomass; 11. Steel slag. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present invention, the present invention is described more comprehensively below. And preferred embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. It should be understood that the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] The weight of the relevant components mentioned in the description of the embodiments of the present invention may not only refer to the specific content of each component, but also indicate the weight ratio between the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the description of the embodiments of the present invention, it is within the scope disclosed in the description of the embodiments of the present invention. Specifically, the weight described in the description of the embodiments of the present invention may be a mass unit known in the chemical industry such as μg, mg, g, kg, etc.

[0036] See also Figure 1 and Figure 2 In one embodiment of the present application, a steel slag waste heat carbonization equipment is provided, comprising at least one carbonization device 100. The carbonization device 100 comprises a heat storage chamber 2 and a carbonization chamber 3; the heat storage chamber 2 is used to place steel slag, and the carbonization chamber 3 is arranged around the outer side of the side wall of the heat storage chamber 2.

[0037] In the above-mentioned steel slag waste heat charcoal making equipment, the carbonization chamber 3 in the charcoal making device 100 is arranged around the outer side of the side wall of the heat storage chamber 2; when the biomass material to be carbonized is placed in the carbonization chamber 3 and the high-temperature steel slag is placed in the heat storage chamber 2, the heat of the steel slag in the heat storage chamber 2 is conducted to the surroundings, so that the biomass material in the carbonization chamber 3 is heated and carbonized; further, the carbonization chamber 3 is arranged around the outer side of the side wall of the heat storage chamber 2, so that the biomass in the carbonization chamber 3 is heated more evenly and the carbonization effect is more uniform; further, the carbonization chamber 3 is arranged around the outer side of the side wall of the heat storage chamber 2, which can reduce the heat conduction of the heat storage chamber 2 to the surrounding air to a certain extent, has a certain thermal insulation effect on the heat storage chamber 2, and makes more heat used for the carbonization of the biomass, further improves the utilization rate of the steel slag waste heat, and is conducive to improving the charcoal making efficiency.

[0038] In some embodiments, the heat storage chamber 2 and the carbonization chamber 3 are provided with a common wall and separated by the common wall. It can be understood that the common wall is the side wall of the heat storage chamber 2, and the common wall is the inner wall of the carbonization chamber 3, wherein the inner wall and the outer wall of the carbonization chamber 3 form the carbonization chamber 3 space.

[0039] Furthermore, the carbonization chamber 3 surrounds the side wall of the heat storage chamber 2 to form an annular cross-sectional structure.

[0040] In some embodiments, the thickness of the common wall is 15 mm to 20 mm. As an example, the thickness of the common wall can be 15 mm, 16 mm, 17 mm, 18 mm, 19 mm or 20 mm. Further, the thickness of the common wall can be a range value consisting of any two of the above point values ​​as end values. By controlling the thickness of the common wall, the heat in the heat storage chamber 2 can be smoothly transferred to the biomass to be carbonized in the carbonization chamber 3.

[0041] In some embodiments, the material of the common wall is steel. Specifically, it can be conventional stainless steel or heat-resistant steel. The heat conduction effect in the heat storage chamber 2 can be controlled by controlling the material of the common wall.

[0042] In some embodiments, the thickness of the outer wall of the carbonization chamber 3 is 8 mm to 15 mm. Further controlling the thickness of the outer wall of the carbonization chamber 3 is beneficial to reducing the heat conduction in the carbonization chamber to the surroundings, so that the heat is used to the maximum extent for carbonizing the biomass to be carbonized.

[0043] In some embodiments, the ratio of the volume of the heat storage chamber 2 to the volume of the carbonization chamber 3 is (3-5): 1. As an example, the ratio of the volume of the heat storage chamber 2 to the volume of the carbonization chamber 3 is 3: 1, 3.5: 1, 4: 1, 4.5: 1 or 5: 1. Further, the ratio of the volume of the heat storage chamber 2 to the volume of the carbonization chamber 3 can be any other ratio within the above range.

[0044] In some embodiments, the cross section of the heat storage chamber 2 is circular, square, rectangular or hexagonal, or other polygonal shapes. The cross section of the carbonization chamber 3 is circular, square, rectangular or hexagonal, or other polygonal ring structures.

[0045] It can be understood that the cross-sectional shape of the heat storage chamber 2 refers to the shape formed by the side wall of the heat storage chamber 2 (that is, the common wall of the heat storage chamber 2 and the carbonization chamber 3) in the cross section. The cross-sectional shape of the carbonization chamber 3 refers to the shape formed by the outer wall of the carbonization chamber 3 and the side wall of the heat storage chamber 2 in the cross section.

[0046] like Figure 4 In the specific example shown, the cross section of the heat storage chamber 2 is a square; the cross section of the carbonization chamber 3 is a square ring.

[0047] Furthermore, the width of the square ring structure of the carbonization chamber 3 is 2000 mm to 3000 mm; the width is the shortest vertical distance between the inner side of the outer wall of the carbonization chamber 3 and the outer side of the side wall of the heat storage chamber 2 .

[0048] See also Figure 3 In some embodiments, the heat storage chamber 2 is divided into an upper portion 21, a middle portion 22 and a lower portion 23; wherein the upper portion 21, the middle portion 22 and the lower portion 23 are connected in sequence.

[0049] Furthermore, the cross-sectional shapes of the upper portion 21 , the middle portion 22 and the lower portion 23 of the heat storage chamber 2 are the same.

[0050] Furthermore, the inner diameters of the upper portion 21, the middle portion 22 and the lower portion 23 show a trend of gradually decreasing. Figure 3 As shown, the inner diameter of the lower port of the upper portion 21 is the same as the inner diameter of the upper port of the middle portion 22 , and the inner diameter of the upper port of the lower portion 23 is the same as the inner diameter of the lower port of the middle portion 22 .

[0051] In some embodiments, in the longitudinal cross section, the upper portion 21 of the heat storage chamber 21 is rectangular, the middle portion 22 is an inverted trapezoid, and the lower portion 23 is rectangular. Further, the inner diameter side length of the upper portion 21 of the heat storage chamber 2 is 2000mm~3000mm. Further, the inner diameter side length of the lower portion 23 of the heat storage chamber 2 is 1000mm~1500mm. It can be understood that the inner diameter side length of the upper portion 21 of the heat storage chamber 2 is the width and / or length of the inner side of the side wall of the upper portion 21 in the cross section. The inner diameter side length of the lower portion 23 of the heat storage chamber 2 is the width and / or length of the inner side of the side wall of the lower portion 21 in the cross section.

[0052] See also Figure 4 When the steel slag waste heat carbonizing equipment includes multiple carbonizing devices 100, the multiple carbonizing devices 100 are arranged adjacent to each other; further, the carbonization chambers 3 of two adjacent carbonizing devices 100 are in contact with each other, thereby reducing the contact between the outer wall of the carbonization chamber 3 and the air, reducing the heat loss of the carbonization chamber 3, and being beneficial to improving heat utilization and carbonization efficiency.

[0053] Furthermore, the smoke exhaust ducts of multiple charcoal making devices 100 are connected in series, so that the collected smoke is centrally processed.

[0054] Furthermore, a plurality of carbon making devices 100 can be arranged in columns and connected in series. On this basis, they can also be arranged in rows, thus forming a matrix arrangement. Figure 4 In a specific example, the cross section of the carbonization device 100 is a square. Two adjacent carbonization devices 100 are closely arranged along the side length of the outer wall of the carbonization chamber 3, and the contact area between the two adjacent carbonization devices 100 is large; so that the heat in the two adjacent carbonization chambers 3 can be mutually transferred, which can further reduce the heat loss in the carbonization chamber 3 to the air and further improve the heat utilization rate.

[0055] In some embodiments, the inner cavity height of the heat storage chamber 2 is greater than or equal to the inner cavity height of the carbonization chamber 3. This ensures that the carbonization chamber 3 is in full contact with the heat storage chamber 2, and the biomass to be carbonized in the carbonization chamber 3 can be heated and carbonized.

[0056] In some embodiments, the bodies of the heat storage chamber 2 and the carbonization chamber 3 are both open at both ends.

[0057] In some embodiments, the carbon making device 100 also includes an insulation cover 1, a first valve 7 and a second valve 5. The insulation cover 1 is detachably arranged at the top openings of the heat storage chamber 2 and the carbonization chamber 3; the first valve 7 is arranged at the lower end opening of the main body of the heat storage chamber 2, and the second valve 5 is arranged at the lower end opening of the main body of the carbonization chamber 3.

[0058] In some embodiments, the second valve 5 is disposed around the lower opening of the carbonization chamber 3 .

[0059] In some embodiments, the lower opening of the heat storage chamber 2 is located below the lower opening of the carbonization chamber 3. In this way, the carbonization chamber 3 can be completely in contact with the heat storage chamber 2, and the biomass to be carbonized in the carbonization chamber 3 can be completely heated and carbonized.

[0060] In some embodiments, the heat-insulating cover 1 is provided with a smoke exhaust duct 4 connected to the carbonization chamber 3 .

[0061] In some embodiments, the shape of the smoke exhaust duct 4 is S-shaped or Z-shaped. Setting the smoke exhaust duct in S-shaped or Z-shaped shape can facilitate the opening and closing of the insulation cover and the connection between the smoke exhaust duct 4 and the main smoke duct 8.

[0062] In some embodiments, the other end of the smoke exhaust duct 4 is detachably connected to the main smoke duct 8. The main smoke duct 8 is used to transport the smoke generated in each charcoal making device 100 to the dust removal system.

[0063] In some embodiments, two or more main flues 8 may be provided. The number of main flues may be determined according to the actual processing capacity of the dust removal system and the setting of the steel slag waste heat carbon making equipment.

[0064] In some embodiments, the other end of the smoke exhaust duct 4 is connected to the main smoke duct 8 via a connecting pipe 9. The smoke exhaust duct 4 is connected to the main smoke duct 8 via the connecting pipe 9, so that the smoke exhaust duct 4 can be conveniently connected to the main smoke duct detachably.

[0065] In some embodiments, there are multiple carbon making devices 100 in the steel slag waste heat carbon making equipment, and the exhaust duct 4 in each carbon making device 100 is connected to a main flue 8 through a connecting pipe 9. Alternatively, a part of the exhaust duct 4 is connected to a main flue 8 through a connecting pipe 9, and another part of the exhaust duct 4 is connected to another main flue 8 through a connecting pipe 9.

[0066] In some embodiments, the carbon making device 100 further includes a shielding plate 6 , which is disposed on the outer side of the side wall of the heat storage chamber 2 , and the shielding plate 6 is located below the lower end opening of the main body of the carbonization chamber 3 .

[0067] In some embodiments, the shielding plate 6 is located above the lower end opening of the main body of the heat storage chamber 2 .

[0068] In some embodiments, the shielding plate 6 is disposed around the outer side of the side wall of the heat storage chamber 2 .

[0069] In some embodiments, the projection of the first valve 7 in the vertical direction is located within the projection range of the baffle plate 6 in the vertical direction.

[0070] In some embodiments, the width of the shielding plate 6 extending outward from the outer side of the side wall of the heat storage chamber 2 is greater than or equal to the width of the first valve 7 exposed from the body of the heat storage chamber 2 .

[0071] In some embodiments, the width of the shielding plate 6 extending outward from the outer side of the side wall of the heat storage chamber 2 ranges from 200 mm to 300 mm.

[0072] In some embodiments, the shielding plate 6 is arranged to be tilted downward from the outer side of the side wall of the heat storage chamber 2 .

[0073] In some embodiments, the shielding plate 6 is tilted downward at an angle of 30° to 45°.

[0074] See also Figure 1 and Figure 3 In another embodiment of the present application, a method for making carbon using the above-mentioned steel slag waste heat carbon making equipment is provided, comprising the following steps:

[0075] Steel slag 11 is placed in the heat storage chamber 2, and biomass 10 is added into the carbonization chamber 3 for carbonization.

[0076] There is no specific requirement for the order of placing the steel slag 11 in the heat storage chamber 2 and adding the biomass 10 to the carbonization chamber 3. The steel slag 11 can be placed in the heat storage chamber 2 first, and then the biomass 10 can be added to the carbonization chamber 3; or the biomass 10 can be added to the carbonization chamber 3 first, and then the steel slag 10 can be placed in the heat storage chamber 2.

[0077] In some embodiments, the step of placing steel slag in the heat storage chamber 2 includes: introducing steel slag having a temperature greater than or equal to 800° C. into the heat storage chamber 2 .

[0078] In some embodiments, the slag 11 is converter slag.

[0079] In some embodiments, the temperature of the converter slag is ≥ 1500°C.

[0080] In some embodiments, the step of introducing the converter slag into the heat storage chamber 2 also includes the step of air quenching the converter slag.

[0081] In some embodiments, the air volume during wind quenching is 60000Nm 3 / h~100000Nm 3 / h.

[0082] In some embodiments, the pressure during wind quenching is 0.4 MPa~1.0 MPa.

[0083] In some embodiments, the steel slag obtained after wind quenching is steel slag particles with an average particle size of 0.2 mm to 3.0 mm.

[0084] In some embodiments, the carbonization time is 2 h to 7 h.

[0085] In some embodiments, when the temperature of the steel slag in the heat storage chamber 2 is less than or equal to 400° C. to 450° C., the steel slag 11 in the heat storage chamber 2 is discharged, and new steel slag 11 is re-introduced.

[0086] In some embodiments, the biomass 10 includes at least one of rice husks, wood chips, sugarcane residues, Chinese medicinal residues, straw, and reeds.

[0087] In another embodiment of the present application, a carbonized material prepared by using the above-mentioned steel slag waste heat carbonization method is provided.

[0088] In another embodiment of the present application, a carbonized product is provided, comprising the above-mentioned carbonized material.

[0089] In some embodiments, the carbonized product includes, but is not limited to, activated carbon, a heat preservation agent, and a reducing agent.

[0090] In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The embodiments described below are only preferred embodiments of the present invention, which can be used to describe the present invention and cannot be understood as limiting the scope of the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0091] In order to better illustrate the present invention, the present invention is further described below in conjunction with the embodiments. The following are specific embodiments.

[0092] Example 1

[0093] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 This embodiment provides a steel slag waste heat carbonization equipment, and uses the steel slag waste heat carbonization equipment to carbonize biomass materials.

[0094] Specifically, the steel slag waste heat carbon making equipment used in this embodiment contains a plurality of steel slag waste heat carbon making devices 100, each of which includes a heat storage chamber 2 and a carbonization chamber 3, and the carbonization chamber 3 is arranged around the outer side of the side wall of the heat storage chamber 2; wherein the heat storage chamber 2 and the carbonization chamber 3 are arranged with a common wall and separated by the common wall, and the thickness of the common wall is 20mm; the thickness of the outer wall of the carbonization chamber 3 is 10mm. In cross section, the cross section of the heat storage chamber 2 is square, and the cross section of the carbonization chamber 3 is square ring, wherein the inner diameter side length of the upper part of the heat storage chamber 2 is 3000mm, and the inner diameter side length of the lower part is 1500mm, and the width of the square ring structure of the carbonization chamber 3 is 3000mm. A detachable heat preservation cover 1 is provided at the top of the carbonization chamber 3 and the heat storage chamber 2. The heat preservation cover 1 is provided with an S-shaped smoke exhaust duct 4 connected to the carbonization chamber 3. The other end of the S-shaped smoke exhaust duct 4 is connected to the main smoke duct 8 through a connecting pipe 9; wherein a plurality of S-shaped smoke exhaust ducts 4 are connected to the main smoke duct 8, and the main smoke duct 8 can send the smoke generated by the carbonization chamber to the dust removal system. A first valve 7 is installed at the lower end opening of the body of the heat storage chamber 2, and a second valve 5 is installed at the lower end opening of the body of the carbonization chamber 3. A baffle plate 6 is arranged around the outer side of the side wall of the heat storage chamber 2 which is lower than the second valve 5 and higher than the first valve 7; the inclination angle of the baffle plate 6 is 45°; the width of the baffle plate 6 extending outward from the outer side of the side wall of the heat storage chamber 2 is greater than the width of the first valve 7 exposed from the body of the heat storage chamber 2.

[0095] The carbonization method of biomass materials is as follows:

[0096] (1) Open the heat preservation cover 1, close the second valve 5 (i.e., carbon discharge valve) at the lower end of the carbonization chamber 3 and the first valve 7 (i.e., slag discharge valve) at the lower end of the heat storage chamber 2, and load 2.5 tons of rice husks to be carbonized into the carbonization chamber 3.

[0097] (2) After the converter is tapped, 15 tons of slag is poured out at a temperature of about 1520℃~1540℃, and air quenching is performed with an air volume of 80000Nm 3 / h, pressure 0.5MPa, after wind quenching, the surface temperature of the obtained steel slag particles is about 950℃~980℃; the average particle size of the steel slag particles is 0.2mm~3.0mm.

[0098] (3) 15t of air-quenched steel slag particles 11 are loaded into the heat storage chamber 2, covered with the heat preservation cover 1, and left to stand for 3 hours until the rice husk is completely carbonized. During the carbonization process, the smoke generated in the carbonization chamber 3 is discharged into the main smoke pipe 8 through the S-shaped smoke exhaust duct connected to the carbonization chamber 3, and then enters the dust removal system.

[0099] (4) After carbonization is completed, open the carbon discharge valve 5 to release the carbonized rice husk.

[0100] (5) Continue to add 2.5 tons of rice husks into the carbonization chamber 3 and let it stand for 6 hours; open the carbon discharge valve 5 to release the carbonized rice husks, and then open the slag discharge valve 7 to discharge the steel slag particles 11. The surface temperature is about 400℃~450℃.

[0101] (6) Close the carbon discharge valve 5 and the slag discharge valve 7, and reload them.

[0102] Production parameters and results:

[0103] After two carbonization treatments, the residual heat of each ton of air-quenched steel slag particles can carbonize about 330 kg of rice husks on average.

[0104] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims, and the description can be used to interpret the content of the claims.

Claims

1. A steel slag waste heat carbon making equipment, characterized in that: It comprises at least one carbon making device, which comprises a heat storage chamber and a carbonization chamber; the heat storage chamber is used for placing steel slag, and the carbonization chamber is arranged around the outer side of the side wall of the heat storage chamber.

2. The steel slag waste heat carbon making equipment according to claim 1, characterized in that: The heat storage chamber and the carbonization chamber are provided with a common wall and are separated by the common wall.

3. The steel slag waste heat carbon making equipment according to claim 2, characterized in that: At least one of the following conditions is met: (1) The thickness of the common wall is 15 mm to 20 mm; (2) The common wall is made of steel.

4. The steel slag waste heat carbon making equipment according to any one of claims 1 to 3, characterized in that: At least one of the following conditions is met: (1) The thickness of the outer wall of the carbonization chamber is 8 mm to 15 mm; (2) The ratio of the volume of the heat storage chamber to the volume of the carbonization chamber is (3-5):1; (3) The cross section of the heat storage chamber is a square; the cross section of the carbonization chamber is a square ring; (4) The inner cavity height of the heat storage chamber is greater than or equal to the inner cavity height of the carbonization chamber.

5. The steel slag waste heat carbon making equipment according to any one of claims 1 to 3, characterized in that: The bodies of the heat storage chamber and the carbonization chamber are both structures with openings at both ends; the carbon making device also includes a heat preservation cover, a first valve and a second valve; The heat preservation cover is detachably arranged at the top openings of the main bodies of the heat storage chamber and the carbonization chamber; the first valve is arranged at the lower opening of the main body of the heat storage chamber, and the second valve is arranged at the lower opening of the main body of the carbonization chamber.

6. The steel slag waste heat carbon making equipment according to claim 5, characterized in that: At least one of the following conditions is met: (1) The heat-insulating cover is provided with a smoke exhaust duct connected to the carbonization chamber; (2) The lower opening of the heat storage chamber body is located below the lower opening of the carbonization chamber body.

7. The steel slag waste heat carbon making equipment according to claim 6, characterized in that: The carbon making device further comprises a shielding plate, which is arranged on the outer side of the side wall of the heat storage chamber and is located below the lower end opening of the carbonization chamber body.

8. A method for making carbon using waste heat from steel slag, characterized in that: Carbon making using the steel slag waste heat carbon making equipment as claimed in any one of claims 1 to 7 comprises the following steps: Steel slag is placed in the heat storage chamber, and biomass is added into the carbonization chamber for carbonization.

9. A carbonized material, characterized in that: The method according to claim 8 is used to prepare it.

10. A carbonized product, characterized in that: Comprising the carbonized material as claimed in claim 9.

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