Sulfate residue efficient utilization sintering equipment

Abstract

The utility model provides a kind of sulphuric acid residue efficient utilization sintering equipment, including sintering furnace, the side of sintering furnace is provided with screening cylinder, spiral disc is fixedly connected in the screening cylinder.The utility model has the advantages that: the inertia of sulphuric acid residue with higher iron element content is stronger, it moves to discharge plate over drop hole, and rolls to screening box along discharge plate.Start motor drives magnetic roller to rotate, sulphuric acid residue in screening box falls on magnetic roller under the action of inertia, sulphuric acid residue with more iron content relative to its mass is adsorbed and driven to rotate by magnetic roller, sulphuric acid residue with less iron content relative to its mass flows along magnetic roller to enter discharge cylinder at through hole, so that the magnetic separation of sulphuric acid residue is realized.Sulphuric acid residue with higher iron element content enters sintering furnace through material passage, and completes ironmaking work with other ironmaking raw materials.Sulphuric acid residue is automatically screened, and two screening procedures are passed, and ironmaking raw material has higher iron element content, which is conducive to improving ironmaking quality.

Description

Technical Field

[0001] This utility model relates to the field of sulfuric acid slag recycling technology, and in particular to a high-efficiency sintering equipment for sulfuric acid slag utilization. Background Technology

[0002] Sulfuric acid slag is an industrial waste produced during the smelting of sulfuric acid. It is rich in iron but also contains impurities such as gangue components like silicon, aluminum, calcium, and magnesium, as well as harmful elements like lead, zinc, and arsenic. Sulfuric acid slag can be used as a raw material in iron smelting, replacing some iron ore. This not only reduces iron smelting costs but also decreases dependence on natural iron ore resources, achieving comprehensive resource utilization.

[0003] Because the iron content in sulfuric acid slag varies, its value as a raw material for ironmaking also varies. In ironmaking recycling, directly calcining a mixture of sulfuric acid slag and other ironmaking raw materials using sintering equipment can affect ironmaking quality and make the ironmaking process difficult to control. Therefore, this paper proposes an optimized sintering equipment for the efficient utilization of sulfuric acid slag. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose a sintering equipment for the efficient utilization of sulfuric acid slag, so as to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of this utility model provides a sintering device for the efficient utilization of sulfuric acid slag, including a sintering furnace. A screening cylinder is provided on one side of the sintering furnace, and a spiral disk is fixedly connected inside the screening cylinder. A discharge cylinder is fixedly connected to the bottom surface of the screening cylinder, and a discharge plate is fixedly connected to the bottom end of the spiral disk. A discharge hole is provided on the discharge plate, and a control plate is provided at the discharge hole on the spiral disk to adjust the opening degree of the discharge hole. A screening box is fixedly connected to one side of the screening cylinder, and a magnetic roller that can be rotated by a motor is provided inside the screening box. A through hole is provided between the screening box and the discharge cylinder, and a material passage is provided between the screening box and the sintering furnace. A guide plate is provided between the screening box and the material passage to remove the sulfuric acid slag adsorbed on the magnetic roller, and a metering component is provided on the material passage.

[0007] Preferably, in any of the above embodiments, the bottom surfaces of the screening cylinder and the screening box are fixedly connected to a support frame, and the top of the screening cylinder is fixedly connected to a feed hopper.

[0008] The above technical solution provides a calcination space for sulfuric acid slag and related ironmaking raw materials in the sintering furnace. The specific structure of the sintering furnace can refer to the structure of existing sintering furnaces; this application has no special requirements for its structure. The screening cylinder provides installation space for structures such as the spiral disc, and provides space for the spiral screening of sulfuric acid slag. A support frame is installed below the screening cylinder and screening box to improve the stability of the equipment. A feed hopper is installed at the top of the screening cylinder to facilitate the addition of sulfuric acid slag raw materials.

[0009] Preferably, in any of the above embodiments, a column is provided in the middle of the spiral disk, and the spiral disk is fixedly connected to the bottom plate of the screening cylinder through the column.

[0010] The above technical solution involves setting a column in the middle of the spiral disc and fixing it with the column. The column can provide support for the spiral disc and ensure its stability during the sulfuric acid residue screening process.

[0011] Preferably, in any of the above embodiments, a connecting plate is fixedly connected to the bottom surface of the discharge cylinder, and the discharge plate is inclined.

[0012] Using the above technical solution: Under the influence of gravity, sulfuric acid slag can flow on the spiral disc. Different masses of sulfuric acid slag will produce different rolling speeds. The discharge cylinder is used to discharge sulfuric acid slag with lower iron content and lighter weight. A connecting plate is installed on the bottom surface of the discharge cylinder to facilitate connection with external conveying components. A discharge plate is installed at the end of the spiral disc, which guides the sulfuric acid slag into the screening box.

[0013] Preferably, as described in any of the above schemes, an opening and closing door is provided on the outer side of the screening cylinder at the discharge plate, and a plurality of locking grooves are provided on the bottom surface of the spiral disc, and the control plate is fixed by means of a locking bolt cooperating with the locking groove.

[0014] The above technical solution works as follows: when sulfuric acid residue of different masses rolls on the spiral disc, the heavier residue with a higher iron content has stronger inertia, so it moves over the discharge hole to the discharge plate and rolls along the discharge plate into the screening box. The lighter residue with a lower iron content falls through the discharge hole and enters the discharge cylinder. An opening door is provided on the screening cylinder to allow operators to adjust the position of the control plate as needed, thus adjusting the width of the discharge hole.

[0015] Preferably, in any of the above embodiments, an inclined guide plate is provided at the through hole in the screening box, and the material passage is inclined.

[0016] The above technical solution provides installation and movement space for components such as the magnetic roller in the screening box. The motor drives the magnetic roller to rotate, and the sulfuric acid residue entering the screening box falls onto the magnetic roller due to inertia. Sulfuric acid residue with a relatively high iron content is attracted by the magnetic roller and rotates, while sulfuric acid residue with a relatively low iron content flows along the magnetic roller to the through-hole and enters the discharge cylinder, thus achieving magnetic separation of the sulfuric acid residue. An inclined guide plate is installed below the through-hole to prevent sulfuric acid residue from remaining in the screening box. A material passage is used to allow the sulfuric acid residue to flow from the screening box to the sintering furnace. The material passage is angled, allowing the sulfuric acid residue to flow within it by gravity.

[0017] Preferably, in any of the above embodiments, the guide plate is arranged at an angle, and the upper end of the guide plate abuts against the middle height of the magnetic roller.

[0018] The above technical solution employs a guide plate to separate the sulfuric acid residue adsorbed by the magnetic roller from the magnetic roller and to guide the residue into the material passage. The guide plate is angled, utilizing the kinetic energy of the sulfuric acid residue to ensure smoother flow. The upper end of the guide plate rests against the middle of the magnetic roller; by utilizing the difference in direction between gravity and magnetic force at this location, the sulfuric acid residue can be better separated from the magnetic roller.

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

[0020] 1. This high-efficiency sintering equipment for sulfuric acid slag utilizes a structure including a screening cylinder, spiral disc, discharge cylinder, discharge plate, control panel, discharge hole, screening box, magnetic roller, through holes, and material passage. Sulfuric acid slag is placed in the screening cylinder. When slag of different masses rolls on the spiral disc, the heavier slag with higher iron content has stronger inertia and moves over the discharge hole to the discharge plate, rolling along the plate into the screening box. Sulfuric acid slag with lower iron content and lighter weight falls through the discharge hole into the discharge cylinder. The motor drives the magnetic roller to rotate. Sulfuric acid slag entering the screening box falls onto the magnetic roller due to inertia. Sulfuric acid slag with a relatively higher iron content is attracted by the magnetic roller and rotates, while sulfuric acid slag with a relatively lower iron content flows along the magnetic roller to the through hole and enters the discharge cylinder. This achieves magnetic separation of the sulfuric acid slag. Sulfuric acid slag with a higher iron content enters the sintering furnace through the material passage to complete the ironmaking process with other ironmaking raw materials. The sulfuric acid slag is automatically screened, and after two screening processes, the iron content of the ironmaking raw material is higher, which is beneficial to improving the quality of ironmaking.

[0021] 2. This high-efficiency sintering equipment utilizes sulfuric acid slag. An opening and closing door is provided on the screening cylinder, allowing operators to easily adjust the position of the control plate as needed, thus adjusting the width of the discharge hole. An inclined guide plate is installed below the through hole to prevent sulfuric acid slag from accumulating in the screening box. A material passage allows the sulfuric acid slag to flow from the screening box to the sintering furnace. The inclined design of the material passage allows the sulfuric acid slag to flow within it by gravity.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 3 This is a structural schematic diagram of the screening cylinder and screening box of this utility model;

[0027] Figure 4 For the present utility model Figure 3 A schematic diagram of the structure at point A in the middle.

[0028] In the diagram: 1-Sintering furnace, 2-Screwing cylinder, 3-Spiral disc, 4-Discharge cylinder, 5-Discharge plate, 6-Discharge hole, 7-Control plate, 8-Screwing box, 9-Magnetic roller, 10-Through hole, 11-Material passage, 12-Guide plate, 13-Metering component. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] like Figures 1-4 As shown, this utility model includes a sintering furnace 1, a screening cylinder 2 on one side of the sintering furnace 1, a spiral disk 3 fixedly connected inside the screening cylinder 2, a discharge cylinder 4 fixedly connected to the bottom surface of the screening cylinder 2, a discharge plate 5 fixedly connected to the bottom end of the spiral disk 3, a discharge hole 6 opened on the discharge plate 5, and an adjustment plate 7 at the discharge hole 6 on the spiral disk 3 to adjust the opening degree of the discharge hole 6; a screening box 8 fixedly connected to one side of the screening cylinder 2, a magnetic roller 9 that can be driven by a motor to rotate is installed inside the screening box 8, a through hole 10 is opened between the screening box 8 and the discharge cylinder 4, a material passage 11 is provided between the screening box 8 and the sintering furnace 1, a guide plate 12 that can scrape off the sulfuric acid residue adsorbed on the magnetic roller 9 is provided between the screening box 8 and the material passage 11, and a metering component 13 is provided on the material passage 11.

[0032] Example 1: Support frames are fixedly connected to the bottom surfaces of both the screening cylinder 2 and the screening box 8, and a feed hopper is fixedly connected to the top of the screening cylinder 2. The sintering furnace 1 provides calcination space for sulfuric acid slag and related ironmaking raw materials. The specific structure of the sintering furnace 1 can refer to the structure of existing sintering furnaces; this application has no special requirements for its structure. The screening cylinder 2 provides installation space for structures such as the spiral disc 3, and provides space for the spiral screening of sulfuric acid slag. The support frames installed below the screening cylinder 2 and the screening box 8 help improve the stability of the equipment. A feed hopper is installed at the top of the screening cylinder 2 to facilitate the addition of sulfuric acid slag raw materials to the screening cylinder 2.

[0033] A column is installed in the middle of the spiral disc 3, and the spiral disc 3 is fixedly connected to the bottom plate of the screening cylinder 2 through the column. The column in the middle of the spiral disc 3 provides support for the spiral disc 3 and ensures its stability during the sulfuric acid residue screening process.

[0034] Example 2: A connecting plate is fixedly connected to the bottom surface of the discharge cylinder 4, and the discharge plate 5 is inclined. Under the action of gravity, the sulfuric acid residue can flow on the spiral disc 3. Different masses of sulfuric acid residue will produce different rolling speeds. The discharge cylinder 4 is used to supply sulfuric acid residue with low iron content and light weight. The connecting plate is provided on the bottom surface of the discharge cylinder 4 to facilitate its connection with external conveying components. The discharge plate 5 is provided at the end of the spiral disc 3, which can guide the sulfuric acid residue into the screening box 8.

[0035] An opening / closing door is provided on the outer side of the screening cylinder 2 at the discharge plate 5. Several locking grooves are provided on the bottom surface of the spiral disc 3, and the control plate 7 is fixed in place by a bolt engaging these locking grooves. When sulfuric acid residue of different masses rolls on the spiral disc 3, the heavier residue with higher iron content has stronger inertia and moves across the discharge hole 6 to the discharge plate 5, rolling along it into the screening box 8. The lighter residue with lower iron content falls from the discharge hole 6 and enters the discharge cylinder 4. The opening / closing door on the screening cylinder 2 allows operators to adjust the position of the control plate 7 as needed, thus adjusting the width of the discharge hole 6.

[0036] Example 3: An inclined guide plate is installed at the through hole 10 inside the screening box 8, and the material passage 11 is inclined. The screening box 8 provides installation and movement space for components such as the magnetic roller 9. When the motor is started, it drives the magnetic roller 9 to rotate. The sulfuric acid slag entering the screening box 8 falls onto the magnetic roller 9 under inertia. The sulfuric acid slag with a relatively high iron content is attracted by the magnetic roller 9 and driven to rotate, while the sulfuric acid slag with a relatively low iron content flows along the magnetic roller 9 to the through hole 10 and enters the discharge cylinder 4, thus achieving magnetic separation of the sulfuric acid slag. The inclined guide plate installed below the through hole 10 can prevent sulfuric acid slag from being retained in the screening box 8. The material passage 11 is used to allow the sulfuric acid slag to flow from the screening box 8 to the sintering furnace 1. The material passage 11 is inclined, allowing the sulfuric acid slag to flow within it by gravity.

[0037] The guide plate 12 is angled, with its upper end resting against the middle of the magnetic roller 9. The guide plate 12 separates the sulfuric acid residue adsorbed by the magnetic roller 9 from the roller and guides the residue into the material passage 11. The angled orientation of the guide plate 12 also utilizes the force of the sulfuric acid residue to make its flow smoother. The upper end of the guide plate 12 rests against the middle of the magnetic roller 9, taking advantage of the difference in direction between gravity and magnetic force at this position to better separate the sulfuric acid residue from the magnetic roller 9.

[0038] The working principle of this utility model is as follows:

[0039] S1. Sulfuric acid residue is placed into the screening cylinder 2. When sulfuric acid residue of different masses rolls on the spiral disc 3, the heavier sulfuric acid residue with higher iron content has stronger inertia. It moves over the discharge hole 6 to the discharge plate 5 and rolls along the discharge plate 5 into the screening box 8. The sulfuric acid residue with lower iron content and lighter weight falls from the discharge hole 6 and enters the discharge cylinder 4.

[0040] S2. Start the motor to drive the magnetic roller 9 to rotate. The sulfuric acid residue entering the screening box 8 falls onto the magnetic roller 9 under the action of inertia. The sulfuric acid residue with a relatively high iron content is attracted by the magnetic roller 9 and driven to rotate. The sulfuric acid residue with a relatively low iron content flows along the magnetic roller 9 to the through hole 10 and enters the discharge cylinder 4. In this way, the magnetic separation of sulfuric acid residue is achieved.

[0041] S3, sulfuric acid slag with a higher iron content, enters sintering furnace 1 through material passage 11 and works together with other ironmaking raw materials to complete the ironmaking process.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] 1. This high-efficiency sintering equipment for sulfuric acid slag utilization utilizes a structure including a screening cylinder 2, a spiral disc 3, a discharge cylinder 4, a discharge plate 5, a control plate 7, a discharge hole 6, a screening box 8, a magnetic roller 9, a through hole 10, and a material passage 11. Sulfuric acid slag of different masses is placed in the screening cylinder 2. When the sulfuric acid slag of different masses rolls on the spiral disc 3, the heavier slag with higher iron content has stronger inertia and moves past the discharge hole 6 to the discharge plate 5, rolling along the discharge plate 5 into the screening box 8. The sulfuric acid slag with lower iron content and lighter weight falls from the discharge hole 6 into the discharge cylinder 4. The motor drives the magnetic roller 9 to rotate. The sulfuric acid slag in the screening box 8 falls onto the magnetic roller 9 due to inertia. Sulfuric acid slag with a relatively higher iron content is attracted by the magnetic roller 9 and rotates, while sulfuric acid slag with a relatively lower iron content flows along the magnetic roller 9 to the through hole 10 and enters the discharge cylinder 4. This achieves magnetic separation of the sulfuric acid slag. The sulfuric acid slag, with a higher iron content, enters the sintering furnace 1 through the feed channel 11, where it works together with other ironmaking raw materials to complete the ironmaking process. The sulfuric acid slag is automatically screened, and after two screening processes, the iron content of the ironmaking raw materials is even higher, which is beneficial to improving the quality of ironmaking.

[0044] 2. This efficient sintering equipment utilizes sulfuric acid slag. An opening and closing door is provided on the screening cylinder 2, allowing operators to adjust the position of the control plate 7 as needed, thus adjusting the width of the discharge hole 6. An inclined guide plate is installed below the through hole 10 to prevent sulfuric acid slag from accumulating in the screening box 8. The material passage 11 allows the sulfuric acid slag to flow from the screening box 8 to the sintering furnace 1. The inclined design of the material passage 11 allows the sulfuric acid slag to flow within it by gravity.

Claims

1. A sintering device for high-efficiency utilization of sulfuric acid slag, comprising a sintering furnace (1); characterized in that, A sintering furnace (1) is provided with a screening cylinder (2) on one side. A spiral disc (3) is fixedly connected inside the screening cylinder (2). A discharge cylinder (4) is fixedly connected to the bottom surface of the screening cylinder (2). A discharge plate (5) is fixedly connected to the bottom end of the spiral disc (3). A discharge hole (6) is provided on the discharge plate (5). A control plate (7) is provided on the spiral disc (3) at the discharge hole (6) to adjust the opening degree of the discharge hole (6). A screening box (8) is fixedly connected to one side of the screening cylinder (2). A magnetic roller (9) that can be rotated by a motor is installed inside the screening box (8). A through hole (10) is opened between the screening box (8) and the discharge cylinder (4). A material passage (11) is provided between the screening box (8) and the sintering furnace (1). A guide plate (12) that can remove the sulfuric acid residue adsorbed on the magnetic roller (9) is provided between the screening box (8) and the material passage (11). A metering component (13) is provided on the material passage (11).

2. The sintering equipment for high-efficiency utilization of sulfuric acid slag as described in claim 1, characterized in that: The bottom surfaces of the screening cylinder (2) and screening box (8) are fixedly connected to support frames, and the top of the screening cylinder (2) is fixedly connected to a feed hopper.

3. The sintering equipment for high-efficiency utilization of sulfuric acid slag as described in claim 2, characterized in that: A column is provided in the middle of the spiral disk (3), and the spiral disk (3) is fixedly connected to the bottom plate of the screening cylinder (2) through the column.

4. The sintering equipment for high-efficiency utilization of sulfuric acid slag as described in claim 3, characterized in that: A connecting plate is fixedly connected to the bottom surface of the discharge cylinder (4), and the discharge plate (5) is inclined.

5. The sintering equipment for high-efficiency utilization of sulfuric acid slag as described in claim 4, characterized in that: The outer side of the screening cylinder (2) is provided with an opening and closing door at the discharge plate (5), and the bottom surface of the spiral disc (3) is provided with several locking grooves. The control plate (7) is fixed by locking bolts in conjunction with the locking grooves.

6. The sintering equipment for high-efficiency utilization of sulfuric acid slag as described in claim 5, characterized in that: An inclined guide plate is provided in the screening box (8) at the through hole (10), and the material passage (11) is inclined.

7. The sintering equipment for high-efficiency utilization of sulfuric acid slag as described in claim 6, characterized in that: The guide plate (12) is arranged at an angle, and the upper end of the guide plate (12) abuts against the middle height of the magnetic roller (9).

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