Lithium ore transformation device

Abstract

The lithium ore transformation device comprises a transformation tank, an inner cylinder, a fuel pipe and an ore powder bin, the transformation tank is vertically installed on the ground through a support, the inner cylinder is installed in the middle of the transformation tank, and the inner cylinder and the transformation tank are coaxial; the upper portion of the inner cylinder is open, the lower portion of the inner cylinder is closed, one end of the fuel pipe penetrates through the transformation tank and the inner cylinder and then extends to the middle of the inner cylinder, and an annular pipe is arranged at the end of the fuel pipe and communicated with the fuel pipe. Lithium ore powder and fuel can enter the inner barrel in the same direction, the lithium ore powder makes full contact with the fuel, and heat generated by combustion of the fuel can fully heat the lithium ore powder; by arranging the spiral air channel, high-temperature flue gas and lithium ore powder enter the space between the transformation tank and the inner cylinder in a spiral track, the lithium ore powder and the high-temperature flue gas are separated by utilizing the centrifugal principle, and the loss of the lithium ore powder is avoided; and the storage bin is arranged at the bottom of the transformation tank, so that the lithium ore powder can be insulated and aged by utilizing the waste heat of high-temperature flue gas, and the transformation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to lithium ore, and in particular to a lithium ore transformation device. Background Art

[0002] In the lithium ore processing technology, after the lithium ore is crushed and beneficiated, lithium concentrate with a LiO grade of 4% to 4.7% is obtained. In order to further obtain lithium elements, sulfuric acid needs to react with the lithium concentrate to obtain lithium sulfate. Lithium concentrate is mostly α-type spodumene, which is a monoclinic system with a dense structure and high chemical inertness. It hardly reacts with various acids and alkalis except hydrofluoric acid, so it is not suitable to react directly with lithium sulfate. α-type spodumene needs to be heated to a certain temperature and then transformed into β-type spodumene. β-type spodumene is a tetragonal crystal. Due to the transformation of the crystal form, the physical and chemical properties of the mineral also undergo significant changes, and it can react with acids and alkalis, which is suitable for lithium extraction. Common transformation equipment includes rotary kilns, but rotary kilns are prone to cause lithium concentrate to agglomerate during calcination. For this reason, people have designed new lithium ore transformation devices. For example, Chinese patent application number 202222615594.X discloses a device for rapid transformation of lithium ore by countercurrent collision, which includes: a gas-material mixing mechanism, a feed port, a reaction tower, a fuel delivery pipe, a sedimentation tank, a flue gas duct and a powder outlet; the feed port is located at the top of the reaction tower, the bottom of the reaction tower is connected to the sedimentation tank, and the fuel nozzle of the fuel delivery pipe is located at the bottom of the reaction tower; the feed port is located at the center of the top of the reaction tower, and the fuel nozzle is opposite to the feed port up and down. During the transformation, the device heats up the lithium ore powder by colliding the lithium ore powder with the fuel. Then, in practice, the lithium ore powder will be blown upward by the hot air, so that the lithium ore powder cannot contact the high temperature point of the fuel. In addition, the time period for the lithium ore powder to contact the high temperature hot gas leads to low actual transformation efficiency. Therefore, a lithium ore transformation device is needed, in which the fuel and the lithium ore powder are sprayed in the same direction, the fuel and the lithium ore powder are fully contacted and burned, and the lithium ore powder is in contact with the high temperature flue gas for a long time, so as to improve the lithium ore transformation efficiency. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a lithium ore transformation device, in which the fuel and the lithium ore powder are sprayed in the same direction, the fuel and the lithium ore powder are fully contacted and burned, and the lithium ore powder is in contact with the high-temperature flue gas for a long time, which is convenient for improving the lithium ore transformation efficiency.

[0004] The present invention is achieved through the following technical solutions: The present invention proposes a lithium ore transformation device, including: a transformation tank, an inner cylinder, a fuel pipe, and a mineral powder bin. The transformation tank is vertically installed on the ground through a bracket, and the inner cylinder is installed in the middle of the transformation tank, and the inner cylinder is coaxial with the transformation tank; the upper part of the inner cylinder is open, and the lower part of the inner cylinder is closed. One end of the fuel pipe passes through the transformation tank and the inner cylinder and extends to the middle of the inner cylinder. An annular tube is provided at the end of the fuel pipe, and the fuel pipe is connected to the annular tube; the mineral powder bin is installed on one side of the bracket, and the mineral powder bin is connected to the bottom of the inner cavity of the inner cylinder through a feeding pipe.

[0005] Furthermore, a plurality of spiral connection plates are provided between the upper portion of the inner tube and the transition tank, and the upper portion of the inner tube and the transition tank form a spiral airway through the connection plates.

[0006] Furthermore, the wall of the annular tube is provided with a plurality of fuel outlets, and the openings of the fuel outlets face upward.

[0007] Furthermore, the lower portion of the inner cylinder is conical, the end of the feed pipe penetrates into the inner cylinder from bottom to top, and the penetration end of the feed pipe faces vertically upward, and the penetration end of the feed pipe is coaxial with the annular tube.

[0008] Furthermore, the mineral powder bin is connected to one end of a feeding pipe through a first screw conveyor, and one end of the feeding pipe is connected to a compressed air pipe.

[0009] Furthermore, the lower part of the transition tank is conical, an exhaust pipe is provided at the bottom of the transition tank, a first end of the exhaust pipe is connected to the transition tank, and a second end of the exhaust pipe is connected to the scrubbing tower.

[0010] Furthermore, the first end of the exhaust pipe extends into the transition tank in a vertical direction, and a storage bin is left between the exhaust pipe and the lower side wall of the transition tank.

[0011] Furthermore, the bottom of the storage bin is connected to the outside of the transformation tank through a second screw conveyor.

[0012] Furthermore, the exhaust pipe is made of iron.

[0013] Furthermore, the outer diameter of the inner cylinder is 1 / 4 to 1 / 3 of the inner diameter of the transformation tank.

[0014] Beneficial effects of the present invention:

[0015] 1. By arranging the fuel pipe and the feeding pipe at the bottom of the inner cylinder, the lithium ore powder can enter the inner cylinder in the same direction as the fuel, the lithium ore powder is fully in contact with the fuel, and the heat generated by the combustion of the fuel can fully heat the lithium ore powder;

[0016] 2. By setting up a spiral airway, the high-temperature flue gas and lithium ore powder enter the space between the transformation tank and the inner cylinder in a spiral trajectory, and the lithium ore powder is separated from the high-temperature flue gas by the centrifugal principle to avoid the loss of lithium ore powder;

[0017] 3. By setting up a storage bin at the bottom of the transformation tank, the waste heat of the high-temperature flue gas can be used to keep the lithium ore powder warm and age, thereby improving the efficiency of the transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the lower part of the inner cylinder of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the mineral powder bin of the present invention;

[0021] In the figure: 1-transformation tank, 2-inner cylinder, 3-fuel pipe, 4-mineral powder bin, 5-bracket, 6-annular pipe, 7-feeding pipe, 8-connecting plate, 9-fuel outlet, 10-first screw conveyor, 11-compressed air pipe, 12-exhaust pipe, 13-storage bin, 14-second screw conveyor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, an embodiment of the present invention provides a lithium ore transformation device, including: a transformation tank 1, an inner cylinder 2, a fuel pipe 3, and a mineral powder bin 4. The transformation tank 1 is vertically installed on the ground through a bracket 5, and the inner cylinder 2 is installed in the middle of the transformation tank 1, and the inner cylinder 2 is coaxial with the transformation tank 1; the upper part of the inner cylinder 2 is open, and the lower part of the inner cylinder 2 is closed. One end of the fuel pipe 3 passes through the transformation tank 1 and the inner cylinder 2 and then extends to the middle of the inner cylinder 2. An annular tube 6 is provided at the end of the fuel pipe 3, and the fuel pipe 3 is connected to the annular tube 6; the mineral powder bin 4 is installed on one side of the bracket 5, and the mineral powder bin 4 is connected to the bottom of the inner cavity of the inner cylinder 2 through a feeding pipe 7.

[0026] During production, the fuel enters the inner cylinder 2 through the fuel pipe 3 and is sprayed upward through the annular pipe 6, notifying the lithium ore powder in the mineral powder bin 4 to be fed from the mineral powder bin 4 into one end of the feed pipe 7, and the compressed air pipe 11 sprays oxygen or oxygen-enriched air into the feed pipe 7, thereby blowing the mineral powder at the end of the feed pipe 7 to make it spray into the inner cylinder 2 from the lower part of the inner cylinder 2. After the fuel is ignited, the fuel burns to generate high temperature, thereby heating the lithium ore powder to transform. Since the lithium ore powder floats in the air, the contact area with the high-temperature flue gas is large, the heating speed is fast, and the conversion efficiency is high. The lithium ore powder in the inner cylinder 2 flows in the upper part of the inner cylinder 2 driven by the airflow and passes through the inner cylinder 2 enters the upper part of the transformation tank 1 through the upper opening, and then flows downward. Under the action of the spiral airway surrounded by the connecting plate 8, the high-temperature flue gas and lithium ore powder flow in the middle of the transformation tank 1 in a spiral path. Due to the high density of the lithium ore powder, it will be thrown to the outside during the flow. After contacting the inner wall of the transformation tank 1, the speed decreases and gradually slides downward into the storage bin 13, while the high-temperature flue gas is discharged through the exhaust pipe 12 in the middle of the lower part of the transformation tank 1. When discharged, the waste heat of the high-temperature flue gas heats the exhaust pipe 12, so that the lithium ore powder in the storage bin 13 is kept at a high temperature, which is convenient for aging and improves the efficiency of lithium ore from α type to β type. The lithium ore powder in the storage bin 13 is discharged through the second screw conveyor 14, which is convenient for subsequent reaction with sulfuric acid. After the lithium ore becomes β type, it is easy to react with sulfuric acid, which is convenient for subsequent extraction of lithium elements.

[0027] Preferably, a plurality of spiral connecting plates 8 are provided between the upper portion of the inner cylinder 2 and the transformation tank 1. The upper portion of the inner cylinder 2 and the transformation tank 1 form a spiral airway through the connecting plates 8. After the high-temperature flue gas and lithium ore powder flow in the spiral airway, they will continue to flow downward along the spiral downward path along the line of inertia. The lithium ore powder has a high density and is easily thrown to the outside, so that the lithium ore powder is gradually separated from the high-temperature flue gas to achieve gas-solid separation.

[0028] In a preferred embodiment, Figure 2 As shown, the wall of the annular tube 6 is provided with a plurality of fuel outlets 9, and the openings of the fuel outlets 9 face upward, so that the fuel is sprayed upward, which facilitates the complete combustion of the fuel.

[0029] Specifically, the lower part of the inner cylinder 2 is tapered, and the end of the feed pipe 7 penetrates into the inner cylinder 2 from bottom to top, and the penetration end of the feed pipe 7 is vertically upward, and the penetration end of the feed pipe 7 is coaxial with the annular tube 6, so that the lithium ore powder in the feed pipe 7 enters the inner cylinder 2 from bottom to top, which is the same as the direction of the fuel, so that the high temperature generated by the combustion of the fuel heats the lithium ore powder and transforms it at high temperature.

[0030] Preferably, if Figure 3 As shown, the mineral powder bin 4 is connected to one end of the feeding pipe 7 through the first screw conveyor 10, and one end of the feeding pipe 7 is connected to the compressed air pipe 11. On the one hand, the compressed air pipe 11 drives the lithium ore powder in the mineral powder bin 4 into the inner tube 2 to make it contact with the high-temperature flue gas. At the same time, the compressed air pipe 11 sends oxygen or oxygen-enriched air with an oxygen content of more than 50% into the inner tube 2, so as to facilitate the full combustion of the fuel to generate high temperature to transform the lithium ore powder.

[0031] In a specific embodiment, Figure 2 As shown, the lower part of the transformation tank 1 is conical to prevent the lithium ore powder from gathering at the lower part of the inner tube 2. An exhaust pipe 12 is provided at the bottom of the transformation tank 1. The first end of the exhaust pipe 12 is connected to the transformation tank 1, and the second end of the exhaust pipe 12 is connected to the scrubbing tower. The high-temperature flue gas will still take away 3%-6% of the lithium ore powder. The lithium ore powder can be completely removed from the high-temperature flue gas by scrubbing, and the lithium ore powder in the scrubbing water can be collected to increase the extraction ratio of the lithium element.

[0032] In a preferred embodiment, the first end of the exhaust pipe 12 extends into the transformation tank 1 in the vertical direction, and a storage bin 13 is left between the exhaust pipe 12 and the lower side wall of the transformation tank 1. The lithium ore powder slows down after contacting the inner wall of the transformation tank 1 when being thrown out, and then gradually slides along the inner wall of the transformation tank 1 to the storage bin 13, thereby being stored in the storage bin 13. The high-temperature flue gas will heat the exhaust pipe 12, thereby keeping the storage bin 13 in a high-temperature state to facilitate aging of the lithium ore powder.

[0033] Specifically, the bottom of the storage bin 13 is connected to the outside of the transformation tank 1 through the second screw conveyor 14 , so that the second screw conveyor 14 can discharge the lithium ore powder in the storage bin 13 .

[0034] In a preferred embodiment, the exhaust pipe 12 is made of iron, which has a high thermal conductivity, so that the exhaust pipe 12 can obtain heat from the waste heat of the high-temperature flue gas and maintain the storage bin 13 in a high-temperature state.

[0035] In a specific embodiment, the outer diameter of the inner cylinder 2 is 1 / 4 to 1 / 3 of the inner diameter of the transformation tank 1, so that after the high-temperature flue gas and lithium ore powder enter the transformation tank 1, the diameter increases and the flow rate decreases, which facilitates the separation of lithium ore powder and high-temperature flue gas.

[0036] Of course, the present invention may have many other implementations. Based on this implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present invention.

Claims

1. A lithium ore transformation device, characterized in that: include: A transformation tank (1), an inner tube (2), a fuel pipe (3), and a mineral powder bin (4), wherein the transformation tank (1) is vertically mounted on the ground via a bracket (5), the inner tube (2) is mounted in the middle of the transformation tank (1), and the inner tube (2) is coaxial with the transformation tank (1); the upper part of the inner tube (2) is open, and the lower part of the inner tube (2) is closed; one end of the fuel pipe (3) passes through the transformation tank (1) and the inner tube (2) and then extends to the middle of the inner tube (2); an annular tube (6) is provided at the end of the fuel pipe (3), and the fuel pipe (3) is in communication with the annular tube (6); the mineral powder bin (4) is mounted on one side of the bracket (5), and the mineral powder bin (4) is connected to the bottom of the inner cavity of the inner tube (2) via a feeding pipe (7).

2. A lithium ore transformation device according to claim 1, characterized in that: A plurality of spiral connection plates (8) are provided between the upper portion of the inner tube (2) and the transition tank (1), and the upper portion of the inner tube (2) and the transition tank (1) form a spiral air passage through the connection plates (8).

3. A lithium ore transformation device according to claim 1, characterized in that: The wall of the annular tube (6) is provided with a plurality of fuel outlets (9), and the openings of the fuel outlets (9) face upward.

4. A lithium ore transformation device according to claim 1, characterized in that: The lower part of the inner cylinder (2) is conical, and the end of the feeding pipe (7) penetrates into the inner cylinder (2) from bottom to top, and the penetration end of the feeding pipe (7) is vertically upward, and the penetration end of the feeding pipe (7) is coaxial with the annular tube (6).

5. A lithium ore transformation device according to claim 4, characterized in that: The mineral powder bin (4) is connected to one end of a feeding pipe (7) via a first screw conveyor (10), and one end of the feeding pipe (7) is connected to a compressed air pipe (11).

6. A lithium ore transformation device according to claim 1, characterized in that: The lower part of the transition tank (1) is conical, and an exhaust pipe (12) is provided at the bottom of the transition tank (1). The first end of the exhaust pipe (12) is connected to the transition tank (1), and the second end of the exhaust pipe (12) is connected to the scrubbing tower.

7. A lithium ore transformation device according to claim 6, characterized in that: The first end of the exhaust pipe (12) extends vertically into the transition tank (1), and a storage bin (13) is left between the exhaust pipe (12) and the lower side wall of the transition tank (1).

8. A lithium ore transformation device according to claim 7, characterized in that: The bottom of the storage bin (13) is connected to the outside of the transformation tank (1) through a second screw conveyor (14).

9. A lithium ore transformation device according to claim 8, characterized in that: The exhaust pipe (12) is made of iron.

10. A lithium ore transformation device according to claim 1, characterized in that: The outer diameter of the inner cylinder (2) is 1 / 4 to 1 / 3 of the inner diameter of the transformation tank (1).

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