CN114370760A

CN114370760A - Spodumene transformation type oxygen-enriched roasting method

Info

Publication number: CN114370760A
Application number: CN202210036323.0A
Authority: CN
Inventors: 朱庆典; 钟伟良; 曹群建
Original assignee: Jiangxi Yun Lithium Materials Co ltd
Current assignee: Jiangxi Yun Lithium Materials Co ltd
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-04-19

Abstract

The invention discloses a spodumene transformation type oxygen-enriched roasting method, which comprises the following steps: inspecting equipment, feeding oxygen-enriched incineration, oxygen-enriched roasting stage and cooling exhaust: step A. checking the equipment: before the equipment is used, workers check whether each component of the equipment is damaged or not, and the equipment can be ensured to carry out roasting work normally; b, feeding oxygen-enriched incineration: the materials to be combusted are placed in the rotary kiln burning zone through the feeding hopper, and the rotary kiln burning zone rotates to fully combust the materials in the rotary kiln burning zone. This spodumene transformation oxygen boosting calcination method, carry oxygen to the kiln body inside of rotary kiln burning zone through oxygenating the structure for kiln body is inside to reach the oxygen boosting state, and fuel passes through the combustor and gets into the combustion in the rotary kiln, because of the fuel combustion speed increases fast under the oxygen boosting state, and the burning is more abundant, because the material carries out abundant burning inside the kiln body, reduces harmful gas's output.

Description

Spodumene transformation type oxygen-enriched roasting method

Technical Field

The invention relates to the field of spodumene processing, in particular to a spodumene transformation type oxygen-enriched roasting method.

Background

Spodumene is the main industrial mineral raw material of the current lithium chemical products, and has three crystal forms, namely, the natural form is called alpha-spodumene; the beta-spodumene is converted into beta-spodumene after being heated to 1150-1200 ℃; at higher temperatures, beta spodumene will convert to gamma spodumene; the alpha-type spodumene is a monoclinic system, has compact structure and large chemical inertia, and hardly reacts with various acids and alkalis except hydrofluoric acid, so that the direct extraction of lithium is not suitable; the beta-spodumene is in a tetragonal crystal form, and the physicochemical properties of the transformed minerals of the crystal form are obviously changed, so that the beta-spodumene can react with acid and alkali, and is suitable for extracting lithium; therefore, the crystal form conversion roasting process of spodumene is the basis of the whole lithium extraction process, and the quality of crystal form conversion roasting directly influences the recovery rate of lithium; the prior spodumene roasting transformation technology adopts a preheater, a rotary kiln and a grate cooler process, and the process mainly has the following problems:

1. the heat efficiency of the rotary kiln is low, and the energy consumption is high; local oxygen deficiency often occurs in a fuel combustion area of the existing rotary kiln, so that insufficient fuel combustion is caused, the combustion speed is low, the flame temperature is low, fuel waste is caused, and the energy consumption is high;

2. the yield of a single rotary kiln is low; because the length of a firing zone of the existing rotary kiln is low, the thermal efficiency is low, and the output per unit hour of a single kiln is low;

3. the sintering zone temperature of the rotary kiln is stable, and the spodumene transformation quality is stable; because of insufficient combustion and unstable temperature of a burning zone, the spodumene transformation quality is poor, and the acidification roasting conversion rate of the subsequent process is influenced;

4. the smoke emission does not reach the standard; because of insufficient fuel combustion, carbon particles which are difficult to collect by a dust removal system enter flue gas, and meanwhile, the emission of the flue gas is large.

Disclosure of Invention

The invention provides a spodumene transformation type oxygen-enriched roasting method in order to make up for market blank.

The invention aims to provide a spodumene transformation type oxygen-enriched roasting method to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a spodumene transformation oxygen-enriched roasting method comprises the following steps: inspecting equipment, feeding oxygen-enriched incineration, oxygen-enriched roasting stage and cooling exhaust:

step A. checking the equipment: before the equipment is used, workers check whether each component of the equipment is damaged or not, and the equipment can be ensured to carry out roasting work normally;

b, feeding oxygen-enriched incineration: the material to be combusted is placed in the rotary kiln burning zone through the feeding hopper, and the rotary kiln burning zone rotates to fully combust the material in the rotary kiln burning zone;

step C, oxygen-enriched roasting stage: step B, continuously performing for 1-2 hours, and recycling the combusted materials into a collection frame;

step D, cooling and exhausting: and (3) treating the fully combusted gas through a flue gas purification process until pollutants in the flue gas reach the emission standard and then discharging the gas.

Further, the feeding oxygen-enriched roasting in the step B comprises the following steps:

the oxygen charging structure is characterized in that a liquid oxygen storage tank is mounted on the upper side of a fixing frame of the oxygen charging structure, a vaporizer is mounted on the lower side of the liquid oxygen storage tank, an oxygen storage bag is mounted on the lower side of the vaporizer, an oxygen lance is mounted on the lower side of the oxygen storage bag, and the oxygen discharging end of the oxygen lance is fixedly connected with the oxygen distribution structure;

the rotary kiln burning belt structure, the air-blower is installed to the upper left side of the base of rotary kiln burning belt structure, and the right side of air-blower installs the kiln body, and the air-blower communicates with the tuber pipe through exhaust pipe on it, and inside the kiln body was arranged in to the tuber pipe right-hand member, and the cooling discharge end is installed to the one end of kiln body simultaneously to the one end that the cooling discharge end was kept away from to the kiln body is arranged in the inside of smoke chamber, and the pipe of discharging fume is installed to the upper right side of smoke chamber.

Furthermore, the oxygenation structure comprises a liquid oxygen storage tank, a fixing frame, a vaporizer, an oxygen conveying pipeline, an oxygen storage bag, a manual valve, an oxygen lance and an oxygen distribution structure, and an oxygen outlet pipe of the liquid oxygen storage tank is communicated with the inlet end of the vaporizer.

Furthermore, the vaporizer is communicated with the oxygen storage bag through an oxygen conveying pipeline at the bottom of the vaporizer, an oxygen outlet end of the oxygen storage bag is communicated with an oxygen lance, a manual valve is installed on the oxygen outlet end of the oxygen storage bag, and the oxygen lance is communicated with a combustion cavity inside the kiln body through an oxygen distribution structure.

Further, the oxygen distribution structure comprises an oxygen distribution pipe, branch pipes, an oxygen distribution plate and oxygen outlet holes, wherein the bottom of the oxygen distribution pipe is uniformly provided with a plurality of groups of branch pipes, and one ends of the branch pipes far away from the oxygen distribution pipe penetrate through the side wall of the kiln body and are fixedly connected with the oxygen distribution plate.

Furthermore, the oxygen distribution plate is of a semicircular structure made of high-temperature-resistant metal materials, the sections of the oxygen distribution plate and the kiln body are of concentric circle structures, meanwhile, a plurality of groups of oxygen outlet holes are uniformly formed in the surface of the inner wall of the oxygen distribution plate, and the oxygen distribution plate is uniformly distributed in the kiln body.

Furthermore, the rotary kiln burning zone structure comprises a base, a blower, an air pipe, a collecting frame, a cooling discharge end, a kiln body, a supporting wheel, a motor, a gearbox, a driving gear, a transmission gear, a smoke chamber, a smoke exhaust pipe and a feeding hopper.

Furthermore, a transmission gear is installed on the outer side of the kiln body and meshed with the drive gear, a shaft lever of the drive gear is fixedly connected with an output shaft of the gearbox, an output shaft of the motor is fixedly connected with another output shaft of the gearbox through a coupler, and the outer side of the kiln body is supported through three groups of supporting wheels.

Compared with the prior art, the invention has the beneficial effects that:

1. oxygen is conveyed to the interior of a kiln body of a burning zone of the rotary kiln through an oxygenation structure, so that the interior of the kiln body reaches an oxygen-enriched state, fuel enters the rotary kiln through a burner to be burnt, the burning speed of the fuel is rapidly increased in the oxygen-enriched state, the burning is more sufficient, and the discharge amount of harmful gas is reduced as the material is sufficiently burnt in the kiln body;

2. liquid oxygen is liquefied and then conveyed into a kiln body of a burning zone of the rotary kiln through equipment such as a liquid oxygen storage tank, a fixing frame, a vaporizer, an oxygen conveying pipeline, an oxygen storage bag, a manual valve, an oxygen lance and an oxygen distribution structure, so that the burning zone reaches an oxygen-enriched state, and at the moment, the fuel of the rotary kiln is burnt to reach an oxygen-enriched burning state;

3. the oxygen charging structure enables the interior of the kiln body to form oxygen-enriched combustion, and oxygen is locally added for the oxygen-deficient area, so that the burning point of fuel is reduced, the combustion speed is increased, the fuel is combusted more, and the flame temperature is increased; according to the Wien displacement law, the radiation intensity is in direct proportion to the fourth power of the temperature, so that the utilization rate of heat energy can be greatly improved;

4. for oxygen-enriched combustion, firstly, due to the energy-saving effect, under the condition that the overall energy demand is not changed, the fuel consumption can be obviously reduced, and the emission of fuel type NOX can be reduced; secondly, as the oxygen content in the smoke gas is increased, the nitrogen content is obviously reduced;

5. oxygen enters into the inside of multiunit branch pipe through the oxygen distribution pipe in proper order to enter into the inside of oxygen distribution board, the oxygen distribution board sets up for the arc, spouts in going out the oxygen hole from its surface, makes the inside of entering into the kiln body that oxygen can be even, makes kiln body inside can carry out abundant burning.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic diagram of an oxygen distribution structure of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2 of the structure of the present invention;

FIG. 4 is a three-dimensional view of an oxygen distribution panel of the present invention construction;

FIG. 5 is a block diagram of the workflow of the architecture of the present invention.

In the figure: 1. an oxygenation structure; 11. a liquid oxygen storage tank; 12. a fixed mount; 13. a vaporizer; 14. an oxygen delivery conduit; 15. an oxygen storage bag; 16. a manual valve; 17. an oxygen lance; 18. an oxygen distribution structure; 181. an oxygen distribution pipe; 182. a branch pipe; 183. an oxygen distribution plate; 184. an oxygen outlet; 2. a rotary kiln firing belt structure; 20. a base; 21. a blower; 22. an air duct; 23. a collection frame; 24. cooling the discharge end; 25. a kiln body; 26. a riding wheel; 27. a motor; 28. a gearbox; 29. a drive gear; 30. a transmission gear; 31. a smoking chamber; 32. a smoke exhaust pipe; 33. a feeding hopper.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows: referring to fig. 1-5, the present invention provides a technical solution: a spodumene transformation oxygen-enriched roasting method comprises the following steps: inspecting equipment, feeding oxygen-enriched incineration, oxygen-enriched roasting stage and cooling exhaust:

b, feeding oxygen-enriched incineration: the materials to be combusted are placed in the rotary kiln burning zone through the feeding hopper 33, and the rotary kiln burning zone rotates to fully combust the materials in the rotary kiln burning zone;

step C, oxygen-enriched roasting stage: step B is continuously carried out for 1-2 hours, and the burnt materials are recycled to the collection frame 23;

Oxygen is conveyed to the interior of a kiln body 25 of a burning zone of the rotary kiln through an oxygenation structure 1, so that the interior of the kiln body 25 reaches an oxygen-enriched state, fuel enters the rotary kiln through a burner to be burnt, the burning speed of the fuel is rapidly increased in the oxygen-enriched state, the burning is more sufficient, the burning point temperature of the fuel is reduced, the flame temperature is obviously improved, the volume of combustion-supporting air entering the rotary kiln is reduced, and the heat efficiency of the rotary kiln is greatly improved; because the materials are fully combusted in the kiln body 25, the discharge amount of harmful gases is reduced.

The second embodiment is as follows: the embodiment is further limited by the first embodiment, and the feeding oxygen-enriched roasting in the step B is characterized by comprising the following steps:

the oxygen charging structure 1 is characterized in that a liquid oxygen storage tank 11 is arranged on the upper side of a fixing frame 12 of the oxygen charging structure 1, a vaporizer 13 is arranged on the lower side of the liquid oxygen storage tank 11, an oxygen storage bag 15 is arranged on the lower side of the vaporizer 13, an oxygen lance 17 is arranged on the lower side of the oxygen storage bag 15, and the oxygen discharging end of the oxygen lance 17 is fixedly connected with an oxygen distribution structure 18;

rotary kiln burning zone structure 2, air-blower 21 is installed to the upper left side of rotary kiln burning zone structure 2's base 20, and kiln body 25 is installed on air-blower 21's right side, air-blower 21 communicates with tuber pipe 22 through the exhaust pipe on it, inside kiln body 25 is arranged in to tuber pipe 22 right-hand member, cooling discharge end 24 is installed to the one end of kiln body 25 simultaneously, and kiln body 25 keeps away from the inside of arranging smoke chamber 31 in the one end of cooling discharge end 24, smoke exhaust pipe 32 is installed to the upper right side of smoke chamber 31.

Liquid oxygen is liquefied and then conveyed into a kiln body 25 of a burning zone of the rotary kiln through equipment such as a liquid oxygen storage tank 11, a fixed frame 12, a vaporizer 13, an oxygen conveying pipeline 14, an oxygen storage bag 15, a manual valve 16, an oxygen lance 17, an oxygen distribution structure 18 and the like, so that the burning zone reaches an oxygen-enriched state, and at the moment, the fuel combustion of the rotary kiln reaches an oxygen-enriched combustion state.

The third concrete implementation mode: the present embodiment is further limited to the first embodiment, the oxygenation structure 1 includes a liquid oxygen storage tank 11, a fixed frame 12, a vaporizer 13, an oxygen delivery pipeline 14, an oxygen storage bag 15, a manual valve 16, an oxygen lance 17 and an oxygen distribution structure 18, and an oxygen outlet pipe of the liquid oxygen storage tank 11 is communicated with an inlet end of the vaporizer 13.

The oxygen charging structure 1 enables the interior of the kiln body 25 to form oxygen-enriched combustion, and oxygen is locally added for an oxygen-deficient area, so that the ignition point of fuel is reduced, the combustion speed is increased, the fuel is combusted more, and the flame temperature is increased; according to the Wien displacement law, the radiation intensity is in direct proportion to the fourth power of the temperature, so that the utilization rate of heat energy can be greatly improved;

the fourth concrete implementation mode: the third embodiment is further limited by that, the vaporizer 13 is arranged to communicate with an oxygen storage bag 15 through an oxygen delivery pipe 14 at the bottom thereof, an oxygen outlet end of the oxygen storage bag 15 is communicated with an oxygen lance 17, a manual valve 16 is mounted on the oxygen outlet end of the oxygen storage bag 15, and the oxygen lance 17 is arranged to communicate with a combustion chamber inside the kiln body 25 through an oxygen distribution structure 18.

As described in fig. 1-3: the oxygen-enriched combustion can reduce the air intake of the blower 21 and the discharge of high-temperature flue gas, and can reduce the heat energy loss; the oxygen content of the air is 20.94 percent, and the nitrogen which does not support combustion is 78.097 percent; in the combustion process, a large amount of heat is taken away by the nitrogen, the air inlet amount can be reduced after oxygen-enriched combustion is adopted, namely, the loss of heat energy is reduced, and a fan with lower power can be used due to the reduction of the air amount; when the oxygen content of combustion air is increased from 21% to 30%, the theoretical air quantity is reduced by 30.0%, the theoretical flue gas quantity is reduced by 28.8%, and the loss is reduced by 16.3%; it is described that 23% of rich oxygen is used in cupola furnace in Japan, energy saving is as high as 26.7%; 23% -24% of oxygen enrichment is used on a casting furnace in the United states, and the energy is averagely saved by 44%;

the fifth concrete implementation mode: the fourth embodiment is further limited by the fourth embodiment, the oxygen distribution structure 18 includes an oxygen distribution pipe 181, branch pipes 182, an oxygen distribution plate 183, and oxygen outlet holes 184, and a plurality of groups of branch pipes 182 are uniformly arranged at the bottom of the oxygen distribution pipe 181, and one end of each branch pipe 182 far from the oxygen distribution pipe 181 penetrates through the side wall of the kiln body 25 and is fixedly connected with the oxygen distribution plate 183.

One of the main changes after the oxygen-enriched combustion is the reduction of the amount of the combustion-supporting gas; for actual combustion equipment, under a determined operation condition, the fuel consumption is fixed, the volume ratio of oxygen in combustion air is increased, and even if the volume ratio is only a few percent, the theoretical air quantity required by combustion can be obviously reduced; from the aspect of dust removal, under the condition that the total dust amount is not changed, the smoke amount is reduced due to the reduction of the air amount, the dust concentration in the smoke is increased, the dust removal collection is facilitated, and meanwhile, the volume of dust removal equipment can be correspondingly reduced;

the sixth specific implementation mode: in the fifth embodiment, the oxygen distribution plate 183 is a semi-circular structure made of a high temperature resistant metal material, the cross sections of the oxygen distribution plate 183 and the kiln body 25 are concentric, a plurality of groups of oxygen outlet holes 184 are uniformly formed on the inner wall surface of the oxygen distribution plate 183, and the oxygen distribution plate 183 is uniformly distributed in the kiln body 25.

The oxygen-enriched combustion reduces the influence of nitrogen oxides discharged into the atmosphere on the air, wherein the nitrogen oxides in the flue gas are generally NO and NO2 and are collectively called NOX; NOX generated in the combustion process can react with water vapor in the air to form acid rain, so that the environment is damaged; and the atmospheric environment is protected.

The seventh embodiment: the first embodiment is further limited in that the rotary kiln burning zone structure 2 comprises a base 20, a blower 21, an air duct 22, a collecting frame 23, a cooling discharge end 24, a kiln body 25, a supporting wheel 26, a motor 27, a gearbox 28, a driving gear 29, a transmission gear 30, a smoke chamber 31, a smoke exhaust pipe 32 and a feeding hopper 33.

For oxygen-enriched combustion, firstly, due to the energy-saving effect, under the condition that the overall energy demand is not changed, the fuel consumption can be obviously reduced, and the emission of fuel type NOX can be reduced; secondly, as the oxygen content in the smoke gas is increased, the nitrogen content is obviously reduced; the nitrogen content in the air is set to be 78 percent, the oxygen content is 21 percent, and the simple calculation can obtain that when the oxygen content of the oxygen-enriched air is 25 percent, the concentration of N2 in the combustion-supporting air is reduced to 74 percent, and the reduction is 5.1 percent; when the oxygen content of the oxygen-enriched air is 29 percent, the concentration of N2 in the combustion-supporting air is reduced to 70 percent, and the reduction is 10.2 percent; at the same time, the total air amount is reduced, and the total N2 is greatly reduced; from this point of view, the increase in oxygen content is beneficial for NOX reduction.

The specific implementation mode is eight: the seventh embodiment is further limited by that a transmission gear 30 is mounted on the outer side of the kiln body 25, the transmission gear 30 is meshed with a driving gear 29, the shaft lever of the driving gear 29 is fixedly connected with the output shaft of a gearbox 28, meanwhile, the output shaft of a motor 27 is fixedly connected with another output shaft of the gearbox 28 through a coupling, and the outer side of the kiln body 25 is supported through three sets of riding wheels 26.

As shown in fig. 1-3: inside oxygen of liquid oxygen storage tank 11 vaporizes under vaporizer 13's effect, and enter into inside oxygen gas storage package 15, open manual valve 16 on the pipeline of oxygen gas storage package 15 bottom, make oxygen inject into the inside of oxygen distribution structure 18 through oxygen rifle 17, and enter into the inside of kiln body 25, make the inside oxygen content of increase kiln body 25, make kiln body 25 inside when the burning, form the purpose of rich nutrition burning, can carry out abundant burning to the position of kiln body 25 inside, reduce the quantity that harmful substance generated.

As shown in fig. 2-4: oxygen enters the inside of multiunit branch pipe 182 through oxygen distribution pipe 181 in proper order to enter into the inside of oxygen distribution plate 183, oxygen distribution plate 183 sets up for the arc, spouts in the oxygen outlet 184 on its surface, makes the inside of entering into kiln body 25 that oxygen can be even, makes kiln body 25 inside can carry out abundant burning.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A spodumene transformation oxygen-enriched roasting method comprises the following steps: inspection equipment, pay-off oxygen boosting burn, oxygen boosting calcination stage and cooling exhaust, its characterized in that:

b, feeding oxygen-enriched incineration: the materials to be combusted are placed in the rotary kiln burning zone through the feeding hopper (33), and the rotary kiln burning zone rotates to fully combust the materials in the rotary kiln burning zone;

step C, oxygen-enriched roasting stage: step B is continuously carried out for 1-2 hours, and the burnt materials are recycled to a collection frame (23);

2. The spodumene transformation oxygen-enriched roasting method of claim 1, characterized in that: the feeding oxygen-enriched roasting in the step B is characterized by comprising the following steps:

the oxygen charging structure (1), a liquid oxygen storage tank (11) is installed on the upper side of a fixing frame (12) of the oxygen charging structure (1), a vaporizer (13) is installed on the lower side of the liquid oxygen storage tank (11), an oxygen storage bag (15) is installed on the lower side of the vaporizer (13), an oxygen lance (17) is installed on the lower side of the oxygen storage bag (15), and the oxygen discharging end of the oxygen lance (17) is fixedly connected with an oxygen distribution structure (18);

rotary kiln burns till band structure (2), rotary kiln burns till base (20) upper left side of band structure (2) and installs air-blower (21), and the right side of air-blower (21) installs kiln body (25), air-blower (21) through exhaust pipe and tuber pipe (22) intercommunication above that, inside kiln body (25) were arranged in to tuber pipe (22) right-hand member, cooling discharge end (24) are installed to the one end of kiln body (25) simultaneously, and kiln body (25) are kept away from the one end of cooling discharge end (24) and are arranged in the inside of smoke-box (31), smoke exhaust pipe (32) are installed to the upper right side of smoke-box (31).

3. The spodumene transformation oxygen-enriched roasting method of claim 1, characterized in that: the oxygenation structure (1) comprises a liquid oxygen storage tank (11), a fixing frame (12), a vaporizer (13), an oxygen conveying pipeline (14), an oxygen storage bag (15), a manual valve (16), an oxygen lance (17) and an oxygen distribution structure (18), and an oxygen outlet pipe of the liquid oxygen storage tank (11) is communicated with the inlet end of the vaporizer (13).

4. The spodumene transformation oxygen-enriched roasting method of claim 3, characterized in that: the gasifier (13) is communicated with the oxygen storage bag (15) through an oxygen conveying pipeline (14) at the bottom of the gasifier, an oxygen outlet end of the oxygen storage bag (15) is communicated with an oxygen lance (17), a manual valve (16) is installed on the oxygen outlet end of the oxygen storage bag (15), and the oxygen lance (17) is communicated with a combustion cavity inside the kiln body (25) through an oxygen distribution structure (18).

5. The spodumene transformation oxygen-enriched roasting method of claim 4, characterized in that: the oxygen distribution structure (18) comprises oxygen distribution pipes (181), branch pipes (182), oxygen distribution plates (183) and oxygen outlet holes (184), wherein the bottom of each oxygen distribution pipe (181) is uniformly provided with a plurality of groups of branch pipes (182), and one ends of the branch pipes (182) far away from the oxygen distribution pipes (181) penetrate through the side wall of the kiln body (25) and are fixedly connected with the oxygen distribution plates (183).

6. The spodumene transformation oxygen-enriched roasting method of claim 5, characterized in that: the oxygen distribution plate (183) is of a semicircular structure made of high-temperature-resistant metal materials, the sections of the oxygen distribution plate (183) and the kiln body (25) are of concentric circle structures, meanwhile, multiple groups of oxygen outlet holes (184) are uniformly formed in the surface of the inner wall of the oxygen distribution plate (183), and the oxygen distribution plate (183) is uniformly distributed in the kiln body (25).

7. The spodumene transformation oxygen-enriched roasting method of claim 1, characterized in that: the rotary kiln firing belt structure (2) comprises a base (20), a blower (21), an air pipe (22), a collecting frame (23), a cooling discharge end (24), a kiln body (25), a supporting wheel (26), a motor (27), a gearbox (28), a driving gear (29), a transmission gear (30), a smoke chamber (31), a smoke exhaust pipe (32) and a feeding hopper (33).

8. The spodumene transformation oxygen-enriched roasting method of claim 7, characterized in that: a transmission gear (30) is installed on the outer side of the kiln body (25), the transmission gear (30) is meshed with a driving gear (29), a shaft rod of the driving gear (29) is fixedly connected with an output shaft of a gearbox (28), meanwhile, an output shaft of a motor (27) is fixedly connected with another output shaft of the gearbox (28) through a coupler, and the outer side of the kiln body (25) is supported through three sets of riding wheels (26).