A lithium ore roasting rotary kiln

Abstract

The present invention discloses a lithium ore roasting rotary kiln, which relates to the field of rotary kilns, including a kiln barrel, a kiln head cover is installed at the kiln head position of the kiln barrel, a burner is installed at one end of the kiln head cover, and a smoke chamber is installed at the kiln tail position. The lithium ore roasting rotary kiln described in the present invention is provided with a partition net, and during the rotation process, the material will fall on the surface of the partition net. Due to the partition of the partition net, the material will be scattered, reducing the occurrence of the situation of sandwiching, and the installation connection is carried out by using a fixed spring. When the material falls on the surface of the partition net, the partition net will vibrate, which can accelerate the situation of scattering the material and avoid the phenomenon of material accumulation on the surface of the partition net. In this embodiment, the fixed spring, the connecting plate and the partition net are all made of metal materials with good thermal conductivity. While the material is scattered, heat can be transferred, further avoiding the phenomenon of sandwiching and kiln stagnation.

Description

Technical Field

[0001] The present invention relates to the field of rotary kilns, and particularly to a rotary kiln for roasting lithium ore. Background Art

[0002] Rotary kilns can be divided into cement kilns, metallurgical and chemical kilns, and lime kilns according to the materials processed. Metallurgical and chemical kilns are mainly used for magnetization roasting of lean iron ore in steel mills in the metallurgical industry; oxidation roasting of chromium and nickel iron ore. The rotary kiln for roasting lithium ore belongs to one of the metallurgical and chemical kilns. The rotary kiln is also called a rotary calciner, commonly known as a rotary kiln. Through the rotation process, the fuel burns fully, including processes such as gas flow, fuel combustion, heat transfer, and material movement.

[0003] Since the fuel needs to continuously transfer movement during rotation, it is necessary to ensure that the rotary kiln is in an inclined state. During the heating process of the material in the kiln, in order to ensure production efficiency, a relatively large amount of material will be added to the kiln. However, a large amount of material will cause uneven heat propagation, so it may lead to the situation of undercooked materials and there may also be the situation of kiln clogging under certain circumstances. Therefore, it is necessary to ensure the full heating of the material. Summary of the Invention

[0004] The main purpose of the present invention is to provide a rotary kiln for roasting lithium ore, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A kiln barrel, a kiln head hood is installed at the kiln head position of the kiln barrel, a burner is installed at one end of the kiln head hood, a smoke chamber is installed at the kiln tail position, a discharge chute is opened on the surface of the kiln head hood, a feed chute is opened at the position of the smoke chamber, a large gear is installed on the surface of the kiln barrel, a small gear and a power group are installed below the kiln barrel, the small gear meshes with the large gear, a supporting wheel group is installed at the bottom of the kiln barrel, a refractory layer is arranged inside the kiln barrel, the thickness of the refractory layer at the kiln head position is greater than that at the kiln tail position, and the thickness decreases in a linear pattern;

[0007] A partition net is arranged inside the kiln barrel, the overall width of the partition net is less than half of the inner diameter of the kiln barrel, the partition net is installed on the inner wall of the kiln barrel through a fixing spring, the elastic coefficient of the fixing spring must ensure that when the partition net is placed horizontally, the partition net is almost in a horizontal state, and a connecting plate is installed between the fixing spring and the partition net;

[0008] The partition net includes a plurality of fixed rods, and the plurality of fixed rods are fixedly connected to form a grid shape. A movable rod is sleeved on the surface of the fixed rod, and the movable rod is cross-connected with the corresponding fixed rod. Both ends of the fixed rod are movably sleeved with torsion springs. One end of the torsion spring is fixedly connected to the surface of the movable rod, and the other end of the torsion spring is fixedly installed on the surface of the fixed rod. The plurality of movable rods divide the blank area of the grid in a cross shape.

[0009] A heat conducting rod is fixedly installed on the inner wall of the kiln cylinder. One end of the heat conducting rod is fixed on the inner wall of the kiln cylinder, and the other end extends to the center position of the kiln cylinder. The number of the heat conducting rods is set to be multiple, and they are arranged in a circular array along this position.

[0010] A heat conducting ball is installed at one end of the heat conducting rod close to the center of the kiln cylinder. The diameter of the heat conducting ball is larger than that of the heat conducting rod, and the heat conducting rod and the heat conducting ball are integrally arranged.

[0011] The inside of the heat conducting rod and the heat conducting ball is hollowed out and internally connected. A heat conducting groove is opened in the inside of the kiln cylinder, and the heat conducting groove is communicated with the inside of the heat conducting rod and the heat conducting ball. An air pump is installed on the surface of the kiln cylinder. A sealing plate is installed at the position of the heat conducting groove corresponding to the air pump. A heat conducting inlet pipe is installed at the air inlet end of the air pump, and the inside of the heat conducting inlet pipe is connected to one end inlet of the heat conducting groove. A heat conducting outlet pipe is installed at the air outlet end of the air pump, and the inside of the heat conducting outlet pipe is connected to one end outlet of the heat conducting groove.

[0012] The kiln cylinder includes a section I kiln, a section II kiln, and a section III kiln. One end of the section I kiln is fixedly connected to one end of the section II kiln, and one end of the section III kiln is fixedly connected to the other end. The heat conducting groove includes an air inlet groove, an annular groove, a gas guiding groove, and an air outlet groove. The air inlet groove and the air outlet groove are respectively opened at the opposite ends on the left and right sides of the section I kiln and the section III kiln. The annular groove is opened at both ends of the section II kiln. The heat conducting rod and the heat conducting ball are installed at the position of the annular groove. The gas guiding groove is opened on the inner wall of the section II kiln and is communicated with the two annular grooves, and the gas guiding groove and the air inlet groove are located at the upper and lower opposite positions.

[0013] Vertical grooves are opened on the surface of the kiln head hood. The burner is movably installed in the vertical grooves through a rotating shaft. A sliding joint is installed at the bottom of the burner. A telescopic column is installed at the bottom of the sliding joint. A groove is provided at the bottom of the vertical groove. A compression spring is installed in the groove. A locking assembly is installed between the groove and the telescopic column.

[0014] The locking assembly includes inclined grooves and clamping rods. The number of the inclined grooves is set to be multiple and is opened on the inner wall of the groove. Installation grooves are opened on the surface of the telescopic column. The clamping rods are installed in the installation grooves through connecting springs. A reset assembly is installed on the surface of the telescopic column.

[0015] The reset assembly includes a reset rod and a C-shaped groove. The reset rod is fixed on the surface of the clamping rod, and one end of the reset rod penetrates out of the inside of the C-shaped groove.

[0016] The number of the partition nets is four, two of which are installed inside the second-stage kiln, and the other two are installed inside the second-stage kiln, and the four partition nets are symmetrically installed up, down, left and right.

[0017] The number of the supporting roller groups is three, which are respectively arranged below the first-stage kiln, the second-stage kiln and the third-stage kiln.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, by arranging the partition net, during the rotation process, the material will fall on the surface of the partition net. Due to the partition of the partition net, the material will be scattered, reducing the occurrence of undercooked conditions. And it is installed and connected by using a fixing spring. When the material falls on the surface of the partition net, the partition net will vibrate, which can accelerate the scattering of the material and also avoid the phenomenon of material accumulation on the surface of the partition net. In this embodiment, the fixing spring, the connecting plate and the partition net are all made of metal materials with good heat conduction performance. While the material is being dispersed, heat transfer can also be carried out, further avoiding the phenomena of undercooking and kiln blocking.

[0020] 2. In the present invention, by arranging the fixing rod and the movable rod, the partition net is rectangular. The four sides of the outer rectangle are fixing rods, and it also includes five vertical fixing rods and one horizontal fixing rod inside. It is divided into twelve blank areas. The surface of the fixing rod is sleeved with a movable rod. Each blank area has four movable rods. The movable rod is cross-connected with the corresponding connecting fixing rod. The two movable rods of the fixing rods in the same blank area are fixedly connected as a whole. When the material falls on the surface of the movable rod, the torsion spring rotates, and the movable rod also vibrates to shake off the material on the surface.

[0021] 3. In the present invention, by arranging the heat conduction rod and the heat conduction ball, a plurality of heat conduction rods are placed inside the kiln barrel, so that the heat conduction rods extend into the inside of the material, so that the material always located inside can be smoothly heated during the rotation process, further avoiding the generation of undercooked phenomena. The diameter of the heat conduction ball is larger than the diameter of the heat conduction rod, and the surface area of the heat conduction ball in contact with the material is increased. Therefore, more materials can be contacted, and the heating area can be improved.

[0022] 4. In the present invention, by providing an air inlet groove, an air outlet groove and an annular groove, the air inlet groove and the air outlet groove are respectively opened at the opposite ends on the left and right sides of the first-stage kiln and the third-stage kiln, the annular groove is opened at both ends of the second-stage kiln, the heat conduction rods and the heat conduction balls are installed at the position of the annular groove, the air guiding groove is opened on the inner wall of the second-stage kiln and communicated with the two annular grooves, and the air guiding groove and the air inlet groove are located at the upper and lower opposite positions. The staggered positions are to ensure that as much as possible the inside of each heat conduction rod and heat conduction ball can be filled with hot air.

[0023] 5. In the present invention, by providing an inclined groove, a clamping rod and a connecting spring, only by rotating the burner upward, the inclined groove squeezes the surface of the clamping rod, causing the clamping rod to retract into the inside of the installation groove. When it moves into the inside of the next inclined groove, the burner can be fixed, and the angle between the burner and the material can be adjusted to make the combustion more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of a lithium ore roasting rotary kiln of the present invention;

[0025] Figure 2 is a three-dimensional structure diagram of the position of the power unit of a lithium ore roasting rotary kiln of the present invention;

[0026] Figure 3 is a plan structure diagram of the position of the supporting roller group of a lithium ore roasting rotary kiln of the present invention;

[0027] Figure 4 is a sectional structure diagram of the position of the fixing spring of a lithium ore roasting rotary kiln of the present invention;

[0028] Figure 5 is a three-dimensional structure diagram of the partition net of a lithium ore roasting rotary kiln of the present invention;

[0029] Figure 6 is a disassembled structure diagram of the partition net of a lithium ore roasting rotary kiln of the present invention;

[0030] Figure 7 is a partial sectional structure diagram of the position of the connecting spring of a lithium ore roasting rotary kiln of the present invention;

[0031] Figure 8 is a three-dimensional structure diagram of the burner of a lithium ore roasting rotary kiln of the present invention;

[0032] Figure 9 is a lithium ore roasting rotary kiln of the present invention Figure 8 structural diagram at position A.

[0033] In the figure: 1, kiln barrel; 101, section I kiln; 102, section II kiln; 103, section III kiln; 2, kiln head hood; 3, burner; 4, smoke chamber; 5, feed chute; 6, discharge chute; 7, large gear; 8, small gear; 9, power unit; 10, supporting roller group; 11, refractory layer; 12, partition net; 121, fixed rod; 122, movable rod; 123, torsion spring; 13, fixed spring; 14, connecting plate; 15, heat conducting rod; 16, heat conducting ball; 17, heat conducting groove; 171, air inlet groove; 172, annular groove; 173, air guiding groove; 174, air outlet groove; 18, air pump; 19, sealing plate; 20, heat conducting inlet pipe; 21, connecting spring; 22, C-shaped groove; 23, reset rod; 24, heat conducting outlet pipe; 25, vertical groove; 26, sliding joint; 27, telescopic column; 28, groove; 29, compression spring; 30, inclined groove; 31, clamping rod; 32, installation groove. Detailed implementation manners

[0034] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0035] As Figures 1-9 shown, it includes a kiln barrel 1. As Figure 1 shown, a kiln head hood 2 is installed at the kiln head position of the kiln barrel 1. A burner 3 is installed at one end of the kiln head hood 2. A smoke chamber 4 is installed at the kiln tail position. Since a certain amount of smoke will be generated during the combustion process, the smoke chamber 4 is mainly used for exhausting smoke. A discharge chute 6 is opened on the surface of the kiln head hood 2, and a feed chute 5 is opened at the position of the smoke chamber 4. A large gear 7 is installed on the surface of the kiln barrel 1. A small gear 8 and a power unit 9 are installed below the kiln barrel 1. The number of small gears 8 is set to two groups. The small gear 8 meshes with the large gear 7. A supporting roller group 10 is installed at the bottom of the kiln barrel 1. The supporting roller group 10 first supports the kiln barrel 1 and ensures that the kiln barrel 1 can rotate smoothly. Generally, a gear cover is also installed on the surface of the large gear 7 to protect the large gear 7. As Figure 4 shown, a refractory layer 11 is arranged inside the kiln barrel 1. The refractory layer 11 is generally built with commonly used refractory bricks. Since the burner 3 is located at the kiln head position itself, the thickness of the refractory layer 11 at the kiln head position is greater than that at the kiln tail position, and the thickness decreases in a linear mode. Therefore, the refractory layer 11 at the kiln head position is relatively thick, which can insulate heat to a greater extent, making the utilization rate of the refractory layer 11 higher, and making the inside of the kiln barrel 1 present an inclined state. During the rotation process, it can ensure that the material moves towards the kiln head position;

[0036] The burner 3 starts spraying fire from the position of the kiln head hood 2. The heat of the flame is lower as it is farther away from the kiln head hood 2. Since the heat of the burner 3 is transferred from the position of the kiln head hood 2, when the material enters from the position of the feed chute 5, preheating work can be carried out in advance, enabling the temperature of the material to rise slowly and minimizing the phenomenon of kiln clogging. The power unit 9 drives two small gears 8 to rotate, and the two small gears 8 drive the large gear 7 to rotate, thus causing the kiln barrel 1 to rotate.

[0037] As Figure 4 shown, a partition net 12 is provided inside the kiln barrel 1. The overall width of the partition net 12 is less than half of the inner diameter of the kiln barrel 1. The partition net 12 is installed on the inner wall of the kiln barrel 1 through fixed springs 13. During the rotation process, the material will fall on the surface of the partition net 12. Due to the partition of the partition net 12, the material will be scattered, reducing the occurrence of undercooked conditions. And by using the fixed springs 13 for installation and connection, when the material falls on the surface of the partition net 12, the partition net 12 will vibrate, which can accelerate the scattering of the material and also prevent the phenomenon of material accumulation on the surface of the partition net 12. The elastic coefficient of the fixed springs 13 must ensure that when the partition net 12 is placed horizontally, the partition net 12 remains almost horizontal. A connecting plate 14 is installed between the fixed springs 13 and the partition net 12. In this embodiment, the fixed springs 13, the connecting plate 14, and the partition net 12 are all made of metal materials with good heat conduction performance. While the material is being dispersed, heat transfer can also occur, further avoiding undercooked and kiln clogging phenomena;

[0038] As Figure 5 and Figure 6 shown, the partition net 12 includes a plurality of fixing rods 121. The plurality of fixing rods 121 are fixedly connected to form a grid shape. In this embodiment, the partition net 12 is rectangular, and the four outer sides of the rectangle are the fixing rods 121, and it also includes five vertical fixing rods 121 and one horizontal fixing rod 121 inside, dividing it into twelve blank areas. Activity rods 122 are sleeved on the surface of the fixing rods 121. There are four activity rods 122 in each blank area. The activity rods 122 are cross-connected with the corresponding fixing rods 121. The two activity rods 122 of the fixing rods 121 in the same blank area are fixedly connected as a whole. The two ends of the fixing rods 121 are movably sleeved with torsion springs 123. The diameter of the fixing rods 121 is reduced at the position where the activity rods 122 are installed to ensure that the activity rods 122 do not protrude from the surface of the fixing rods 121 when installed. One end of the torsion spring 123 is fixedly connected to the surface of the activity rod 122, and the other end of the torsion spring 123 is fixedly installed on the surface of the fixing rod 121. The plurality of activity rods 122 divide the blank areas of the grid in a cross shape. The activity rods 122 and the fixing rods 121 are also made of metal materials with good heat conduction performance.

[0039] As Figure 4As shown in the figure, a heat conduction rod 15 is fixedly installed on the inner wall of the kiln barrel 1. One end of the heat conduction rod 15 is fixed to the inner wall of the kiln barrel 1, and the other end extends to the center position of the kiln barrel 1. A plurality of heat conduction rods 15 are provided, and they are arranged in a circular array along this position. Placing more heat conduction rods 15 inside the kiln barrel 1 enables the heat conduction rods 15 to extend into the interior of the material, so that during the rotation process, the material that has been inside can also be heated smoothly, further avoiding the phenomenon of undercooking.

[0040] A heat conduction ball 16 is installed at one end of the heat conduction rod 15 close to the center of the kiln barrel 1. The diameter of the heat conduction ball 16 is larger than that of the heat conduction rod 15. The surface area of the heat conduction ball 16 in contact with the material is increased, so it can contact more materials, which can increase the heating area. The heat conduction rod 15 and the heat conduction ball 16 are integrally arranged, which can make the whole device more stable and avoid gaps between the heat conduction rod 15 and the heat conduction ball 16, so that the material is stuck in the gaps.

[0041] As Figure 4 As shown in the figure, the interiors of the heat conduction rod 15 and the heat conduction ball 16 are hollowed out and internally connected. A heat conduction groove 17 is opened inside the kiln barrel 1. The heat conduction groove 17 is communicated with the interiors of the heat conduction rod 15 and the heat conduction ball 16. An air pump 18 is installed on the surface of the kiln barrel 1. The air pump 18 is installed at a position without the supporting wheel set 10 and the power set 9 to ensure the smooth rotation of the kiln barrel 1. A sealing plate 19 is installed at the position of the heat conduction groove 17 corresponding to the air pump 18, so that the hot air can only pass through the air pump 18. A heat conduction inlet pipe 20 is installed at the air inlet end of the air pump 18, and the interior of the heat conduction inlet pipe 20 is connected to one end inlet of the heat conduction groove 17. A heat conduction outlet pipe 21 is installed at the air outlet end of the air pump 18, and the interior of the heat conduction outlet pipe 21 is connected to one end outlet of the heat conduction groove 17;

[0042] Using the suction ability of the air pump 18, since the heat conduction is directly carried out by the heat conduction rod 15 and the heat conduction ball 16, the heat conduction effect may not be good. Therefore, hot air is used for heating. The air pump 18 sucks the hot air from one side close to the heat conduction groove 17 and discharges it from the other side. Since the interiors of the heat conduction rod 15 and the heat conduction ball 16 are communicated with the interior of the heat conduction groove 17, the hot air passes through the interiors of the heat conduction rod 15 and the heat conduction ball 16. In this way, not only can the heat be fully utilized, but also the heat conduction function of the heat conduction rod 15 and the heat conduction ball 16 can be improved, further reducing the possibility of undercooking and kiln blockage.

[0043] As Figure 4As shown in the figure, the kiln barrel 1 includes the first-stage kiln 101, the second-stage kiln 102, and the third-stage kiln 103. One end of the first-stage kiln 101 is fixedly connected to one end of the second-stage kiln 102, and one end of the third-stage kiln 103 is fixedly connected to the other end. The heat conduction groove 17 includes an air inlet groove 171, an annular groove 172, an air guide groove 173, and an air outlet groove 174. The air inlet groove 171 and the air outlet groove 174 are respectively opened at the opposite ends on the left and right sides of the first-stage kiln 101 and the third-stage kiln 103. The annular groove 172 is opened at both ends of the second-stage kiln 102. The heat conduction rods 15 and the heat conduction balls 16 are installed at the position of the annular groove 172. The air guide groove 173 is opened on the inner wall of the second-stage kiln 102 and communicates with the two annular grooves 172. And the air guide groove 173 and the air inlet groove 171 are located at the upper and lower opposite positions. The staggered position is to ensure that as much as possible the inside of each heat conduction rod 15 and heat conduction ball 16 can be filled with hot air. The transmission direction of the hot air is: entering from the inside of the air inlet groove 171, passing through the heat conduction inlet pipe 20, the air pump 18, the heat conduction outlet pipe 21, the annular groove 172, the heat conduction rods 15 and the heat conduction balls 16, the air guide groove 173, the other annular groove 172, the heat conduction rods 15 and the heat conduction balls 16, and finally exiting from the air outlet groove 174.

[0044] As Figure 7 shown in the figure, vertical grooves 25 are opened on the surface of the kiln head hood 2. The burner 3 is movably installed inside the vertical grooves 25 through a rotating shaft. A sliding joint 26 is installed at the bottom of the burner 3. The sliding joint 26 can slide on the surface of the burner 3, and at the same time, the sliding joint 26 itself can also rotate. A telescopic column 27 is installed at the bottom of the sliding joint 26. A groove 28 is provided at the bottom of the vertical groove 25. A compression spring 29 is installed inside the groove 28. The telescopic column 27 can move up and down inside the groove 28, and at the same time, the sliding joint 26 slides on the surface of the burner 3. Since the combustion angle between the burner 3 and the material will also affect the heat transfer problem, for different kiln barrels 1, different positions of the burner 3 need to be adjusted. A locking component is installed between the groove 28 and the telescopic column 27. When adjusted to different positions, it can be fixed by using the locking component.

[0045] As Figure 7 shown in the figure, the locking component includes an inclined groove 30 and a clamping rod 31. The number of inclined grooves 30 is set to be multiple, and they are opened on the inner wall of the groove 28. An installation groove 32 is opened on the surface of the telescopic column 27. The clamping rod 31 is installed inside the installation groove 32 through a connecting spring 24. The clamping rod 31 is stuck inside the inclined grooves 30 at different positions according to the different heights of the telescopic column 27. In this process, the inclined groove 30 squeezes the surface of the clamping rod 31, causing the clamping rod 31 to retract into the inside of the installation groove 32. When moving into the inside of the next inclined groove 30, the burner 3 can be fixed. A reset component is installed on the surface of the telescopic column 27. Using the reset component can make the burner 3 return to the initial position for re-adjustment.

[0046] The reset assembly includes a reset rod 23 and a C-shaped groove 22. The reset rod 23 is fixed on the surface of the clamping rod 31, and one end of the reset rod 23 passes through the interior of the C-shaped groove 22. When in use, the reset rod 23 is moved to compress the connecting spring 24, and then the compression spring 29 is used to pull the telescopic column 27 downward to return to the initial position. When the angle needs to be adjusted, the burner 3 is pulled upward and rotated.

[0047] There are four partition nets 12, two of which are installed inside the stage II kiln 102, and the other two are installed inside the stage II kiln 102. The four partition nets 12 are installed symmetrically up and down and left and right. Most of the partition nets 12 can disperse the materials more evenly. There are three groups of supporting wheel groups 10, which are respectively arranged below the stage I kiln 101, the stage II kiln 102 and the stage III kiln 103, so as to provide better support for the kiln tube 1 and ensure that the kiln tube 1 can rotate stably.

[0048] It should be noted that the present invention is a lithium ore roasting rotary kiln. When in use, the height of the burner 3 is first adjusted. The burner 3 only needs to be rotated upward, and the inclined groove 30 squeezes the surface of the clamping rod 31, so that the clamping rod 31 is retracted into the inside of the installation groove 32. When it moves to the inside of the next inclined groove 30, the burner 3 can be fixed, and the angle between the burner 3 and the material can be adjusted to make the combustion more sufficient. When it needs to be reset, the reset rod 23 is moved to compress the connecting spring 24, and then the compression spring 29 is used to pull the telescopic column 27 downward to return to the initial position. The burner 3 starts to spray fire from the position of the kiln head cover 2. The heat of the flame is that the farther away from the kiln head cover 2, the lower its temperature. Since the heat of the burner 3 is transferred from the position of the kiln head cover 2, the material can be advanced when entering from the position of the feed chute 5. The preheating work makes the temperature of the material rise slowly to avoid the phenomenon of kiln stagnation as much as possible. The power group 9 drives the two small gears 8 to rotate, and the two small gears 8 will drive the large gear 7 to rotate, so that the kiln tube 1 rotates. During the rotation, the material will fall on the surface of the partition net 12. Due to the partition of the partition net 12, the material will be scattered to reduce the occurrence of undercooked materials. In addition, the air pump 18 absorbs hot air during operation. The air pump 18 absorbs hot air from the side close to the heat conduction groove 17 and discharges it from the other side. Since the interior of the heat conduction rod 15 and the heat conduction ball 16 is connected to the interior of the heat conduction groove 17, the hot air passes through the interior of the heat conduction rod 15 and the heat conduction ball 16, which not only can make full use of the heat, but also can improve the heat conduction function of the heat conduction rod 15 and the heat conduction ball 16, further reducing the possibility of undercooked materials and kiln stagnation.

[0049] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A lithium ore roasting rotary kiln, comprising a kiln barrel (1), a kiln head hood (2) is installed at the kiln head position of the kiln barrel (1), a burner (3) is installed at one end of the kiln head hood (2), a smoke chamber (4) is installed at the kiln tail position, a discharge chute (6) is formed on the surface of the kiln head hood (2), a feed chute (5) is formed at the position of the smoke chamber (4), a large gear (7) is installed on the surface of the kiln barrel (1), a small gear (8) and a power unit (9) are installed below the kiln barrel (1), the small gear (8) meshes with the large gear (7), and a supporting roller group (10) is installed at the bottom of the kiln barrel (1). Characterized in that: A refractory layer (11) is arranged inside the kiln barrel (1), the thickness of the refractory layer (11) at the kiln head position is greater than that at the kiln tail position, and the thickness decreases in a linear pattern; A partition net (12) is arranged inside the kiln barrel (1), the overall width of the partition net (12) is less than half of the inner diameter of the kiln barrel (1), the partition net (12) is installed on the inner wall of the kiln barrel (1) through a fixing spring (13), the elastic coefficient of the fixing spring (13) must ensure that when the partition net (12) is placed horizontally, the partition net (12) is almost in a horizontal state, and a connecting plate (14) is installed between the fixing spring (13) and the partition net (12); The partition net (12) comprises a plurality of fixing rods (121), the plurality of fixing rods (121) are fixedly connected to form a grid shape, a movable rod (122) is sleeved on the surface of the fixing rod (121), the movable rod (122) is cross-connected with the corresponding fixing rod (121), both ends of the fixing rod (121) are movably sleeved with torsion springs (123), one end of the torsion spring (123) is fixedly connected to the surface of the movable rod (122), the other end of the torsion spring (123) is fixedly installed on the surface of the fixing rod (121), and the plurality of movable rods (122) divide the blank area of the grid in a cross shape; Heat conducting rods (15) are fixedly installed on the inner wall of the kiln barrel (1), one end of the heat conducting rod (15) is fixed to the inner wall of the kiln barrel (1), and the other end extends to the center position of the kiln barrel (1), the number of the heat conducting rods (15) is multiple, and they are arranged in a circular array along this position; A heat conducting ball (16) is installed at one end of the heat conducting rod (15) close to the center of the kiln barrel (1), the diameter of the heat conducting ball (16) is greater than the diameter of the heat conducting rod (15), and the heat conducting rod (15) and the heat conducting ball (16) are integrally arranged; The heat-conducting rod (15) and the heat-conducting ball (16) are hollow inside and are interconnected inside. A heat-conducting groove (17) is provided inside the kiln barrel (1), and the heat-conducting groove (17) is communicated with the inside of the heat-conducting rod (15) and the heat-conducting ball (16). An air pump (18) is installed on the surface of the kiln barrel (1). A sealing plate (19) is installed at the position of the heat-conducting groove (17) corresponding to the air pump (18). A heat-conducting inlet pipe (20) is installed at the air inlet end of the air pump (18), and the inside of the heat-conducting inlet pipe (20) is connected to one end inlet of the heat-conducting groove (17). A heat-conducting outlet pipe (21) is installed at the air outlet end of the air pump (18), and the inside of the heat-conducting outlet pipe (21) is connected to one end outlet of the heat-conducting groove (17). The kiln barrel (1) includes a section I kiln (101), a section II kiln (102) and a section III kiln (103). One end of the section I kiln (101) is fixedly connected to one end of the section II kiln (102), and one end of the section III kiln (103) is fixedly connected to the other end. The heat-conducting groove (17) includes an air inlet groove (171), an annular groove (172), an air guiding groove (173) and an air outlet groove (174). The air inlet groove (171) and the air outlet groove (174) are respectively opened at the opposite ends on the left and right sides of the section I kiln (101) and the section III kiln (103). The annular groove (172) is opened at both ends of the section II kiln (102). The heat-conducting rod (15) and the heat-conducting ball (16) are installed at the position of the annular groove (172). The air guiding groove (173) is opened on the inner wall of the section II kiln (102) and is communicated with the two annular grooves (172), and the air guiding groove (173) and the air inlet groove (171) are located at the upper and lower opposite positions.

2. A lithium ore roasting rotary kiln according to claim 1, characterized in that: Vertical grooves (25) are opened on the surface of the kiln head hood (2). The burner (3) is movably installed inside the vertical grooves (25) through a rotating shaft. A sliding joint (26) is installed at the bottom of the burner (3). A telescopic column (27) is installed at the bottom of the sliding joint (26). A groove (28) is provided at the bottom of the vertical groove (25). A compression spring (29) is installed inside the groove (28). A locking assembly is installed between the groove (28) and the telescopic column (27).

3. A lithium ore roasting rotary kiln according to claim 2, characterized in that: The locking assembly includes inclined grooves (30) and clamping rods (31). The number of the inclined grooves (30) is multiple and is opened on the inner wall of the groove (28). An installation groove (32) is opened on the surface of the telescopic column (27). The clamping rod (31) is installed inside the installation groove (32) through a connecting spring (24). A reset assembly is installed on the surface of the telescopic column (27).

4. A lithium ore roasting rotary kiln according to claim 3, characterized in that: The reset assembly includes a reset rod (23) and a C-shaped groove (22). The reset rod (23) is fixed on the surface of the clamping rod (31), and one end of the reset rod (23) penetrates out of the inside of the C-shaped groove (22).

5. A lithium ore roasting rotary kiln according to claim 1, characterized in that: the number of the partition nets (12) is four, two of which are installed inside the second-stage kiln (102), and the other two are installed inside the second-stage kiln (102), and the four partition nets (12) are symmetrically installed vertically, horizontally, and diagonally.

6. A lithium ore roasting rotary kiln according to claim 1, characterized in that: the number of the supporting wheel sets (10) is three, which are respectively arranged below the first-stage kiln (101), the second-stage kiln (102), and the third-stage kiln (103).

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