A device for activating lithium extraction from a clay-type lithium ore by calcination before leaching and a method of use

Abstract

A kind of clay type lithium ore leaching before calcination activation lithium extraction device and method, device includes pre-dryer, pre-heater, first activator, activation separator, second activator, first cooler, second cooler, denitration reactor, pre-drying separator, dust collector, induced draft fan and chimney.The method is: starting induced draft fan, realize ignition in first activator, send clay type lithium ore into pre-dryer, clay type lithium ore is dried and preheated and enters first activator and is calcined, no additive is added during calcination, reduce the environmental protection treatment burden of flue gas and leaching residue, equipment corrosion is lower, and temperature is low during calcination, the temperature of exhaust gas discharged is also lower, and the activation process after calcination realizes heat energy recycling, and through fluidization technology, the waste heat of high-temperature flue gas and high-temperature material is recovered by cascade utilization, which can further reduce energy consumption.Lithium ore product produced by the scheme of the application can realize leaching rate >93% in subsequent leaching process.

Description

Technical Field

[0001] This invention belongs to the field of lithium ore purification technology, and in particular relates to a device and method for calcining and activating clay-type lithium ore before leaching to extract lithium. Background Technology

[0002] Currently, natural lithium resources can be classified into three types based on their occurrence: brine type, hard rock type, and clay type. Among these, brine type lithium deposits and hard rock type lithium deposits are the most widely mined and utilized worldwide.

[0003] For lithium resources from salt lake brine, lithium is relatively easy to separate because it is directly present in the brine. However, the lithium abundance in these resources is low, resulting in high processing costs. Furthermore, due to the relatively mature processing techniques, the potential for further reducing the development cost of these lithium resources is limited.

[0004] Hard-rock lithium resources are characterized by high abundance and large reserves, with a dense lithium ore structure that introduces fewer impurities during lithium purification. However, hard-rock lithium resources have high requirements for vein quality, and the actual number of exploitable veins is limited, making them unsustainable lithium resources. Furthermore, vein mining inevitably leads to environmental damage and pollution problems.

[0005] Clay-type lithium resources were previously considered unprofitable due to their loose structure, high impurity leaching rate, and low recovery rate. However, clay-type lithium resources are characterized by short vein formation time and undemanding formation conditions. Furthermore, with the continuous optimization of lithium purification processes, clay-type lithium resources have the potential for large-scale development and utilization.

[0006] At present, the methods for purifying lithium from clay-type lithium resources can be broadly categorized into direct leaching, calcination with additives, and chlorination-sulfurization.

[0007] Direct leaching refers to the extraction process where a leaching agent is added directly to lithium ore that has not undergone high-temperature roasting. It can be further divided into water leaching and sulfuric acid leaching. Additive roasting involves roasting (or granulating roasting) a mixture of additives and the ore sample, followed by water leaching to obtain a lithium-containing solution. Commonly used additives include hydroxides, carbonates, sulfates, chlorides, and natural materials or industrial byproducts such as limestone and gypsum. Chlorination-sulfurization involves roasting the ore sample in a hydrochloric acid or sulfur dioxide atmosphere for a period of time to achieve sufficient chlorination or sulfidation, followed by water leaching to obtain a lithium-containing solution.

[0008] However, the water leaching method has the problem of low efficiency; although the sulfuric acid leaching method can obtain lithium-containing solutions with high aluminum content, the lithium loss rate during impurity removal is also high; the additive roasting method has the problems of high roasting temperature and high energy consumption; the chlorination and sulfidation method has the problem of severe equipment corrosion and also has a large environmental pressure. Summary of the Invention

[0009] To address the problems existing in the prior art, this invention provides a calcination and activation lithium extraction device and its usage method before leaching clay-type lithium ore, which improves the traditional extraction process of clay-type lithium ore and solves the problems of low leaching rate, low lithium recovery rate, high energy consumption, and severe equipment corrosion in the prior art.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: a calcination and activation lithium extraction device before leaching clay-type lithium ore, comprising a pre-dryer, a preheater, a primary activator, an activation separator, a secondary activator, a first cooler, a second cooler, a denitrification reactor, a pre-drying separator, a dust collector, an induced draft fan, and a chimney; the feed inlet of the pre-dryer is used to introduce clay-type lithium ore, the flue gas inlet of the pre-dryer is connected to the flue gas outlet of the denitrification reactor, the gas-material mixing outlet of the pre-dryer is connected to the gas-material mixing inlet of the pre-drying separator, and the pre-drying separator... The discharge port of the preheater is connected to the feed inlet of the pre-drying separator; the flue gas outlet of the pre-drying separator is connected to the flue gas inlet of the dust collector; the ash discharge port of the dust collector is connected to the feed inlet of the primary activator; the exhaust gas outlet of the dust collector is connected to the air inlet of the induced draft fan; the exhaust port of the induced draft fan is connected to the air inlet of the chimney; the exhaust port of the chimney is connected to the atmosphere and is used to discharge the purified exhaust gas after dust removal; the ash discharge port of the dust collector is used to output lithium-containing dust; the flue gas inlet of the denitrification reactor is connected to the flue gas outlet of the preheater; the flue gas inlet of the preheater... The preheater's outlet is connected to the flue gas outlet of the activation separator; the preheater's outlet is connected to the feed inlet of the primary activator; the primary activator's fuel inlet is used to supply fuel; the primary activator's gas-fuel mixture outlet is connected to the gas-fuel mixture inlet of the activation separator; the primary activator's combustion air inlet is connected to the outlet of the first cooler; the first cooler's inlet is used to introduce ambient temperature combustion air; and the first cooler's outlet is used to output preheated combustion air. The activation separator's outlet is connected to the feed inlet of the secondary activator, and the denitrification agent is added to the activation separator. The inlet of the secondary activator is used to introduce denitrification agent; the fluidizing gas inlet of the secondary activator is used to introduce compressed air; the outlet of the secondary activator is connected to the auxiliary air inlet of the first cooler; the outlet of the secondary activator is used to discharge dust-laden hot air; the outlet of the secondary activator is connected to the inlet of the first cooler; the outlet of the first cooler is connected to the inlet of the second cooler; the heat exchange medium inlet of the second cooler is used to introduce cooling water; the heat exchange medium outlet of the second cooler is used to output hot water or steam; and the outlet of the second cooler is used to output activated lithium ore products.

[0011] A method for using a calcination and activation lithium extraction device before leaching clay-type lithium ore includes the following steps:

[0012] Step 1: Start the induced draft fan. The ambient temperature combustion air enters the first stage activator through the first cooler. At the same time, the fuel is introduced into the first stage activator. The fuel is ignited in the first stage activator to achieve ignition. The generated high temperature flue gas passes through the activation separator, preheater, denitrification reactor, predryer, predrying separator, dust collector, induced draft fan and chimney and is discharged into the atmosphere.

[0013] Step 2: After successful ignition, the clay-type lithium ore is sent into the pre-dryer, where it is preheated and dried by high-temperature flue gas.

[0014] Step 3: After the clay-type lithium ore has been preheated and dried in the pre-dryer, it will enter the pre-drying separator along with the high-temperature flue gas. The separated material will enter the preheater, where the high-temperature flue gas will preheat the material again. At the same time, the separated dust-laden flue gas will enter the dust collector, where the dust collector will remove dust from the flue gas. The purified exhaust gas after dust removal will be discharged into the atmosphere through the induced draft fan and the chimney.

[0015] Step 4: After the material has completed secondary preheating in the preheater, it will enter the primary activator for calcination; at the same time, the lithium-containing dust collected by the dust collector will also enter the primary activator together with the material for calcination.

[0016] Step 5: After the material is calcined in the primary activator, it will enter the activation separator along with the high-temperature flue gas. At the same time, a denitrification agent will be introduced into the activation separator to reduce nitrogen oxides in the high-temperature flue gas.

[0017] Step Six: After the high-temperature flue gas completes denitrification in the activation separator, the material and the high-temperature flue gas are separated again. The separated material enters the secondary activator, and compressed air is introduced into the secondary activator at the same time. The compressed air drives the material into a fluidized state, thereby achieving further activation of the high-temperature material.

[0018] Step 7: After the high-temperature material is further activated in the secondary activator, the generated dust-laden hot air will enter the first cooler together with the activated high-temperature material and exchange heat with the room temperature combustion air in the first cooler. After the heat exchange is completed, the room temperature combustion air becomes preheated combustion air and enters the primary activator. After the heat exchange is completed, the high-temperature material is cooled down.

[0019] Step 8: After the high-temperature material completes its initial cooling in the first cooler, it will enter the second cooler for secondary cooling. At the same time, cooling water is introduced into the second cooler and exchanges heat with the cooling water. After the heat exchange is completed, the cooling water becomes hot water or steam for resource utilization. After the heat exchange is completed, the high-temperature material is cooled down until it is discharged from the second cooler and becomes an activated lithium ore product.

[0020] In step one, the temperature of the purified exhaust gas after dust removal is ≤120℃ when it is discharged from the induced draft fan into the chimney.

[0021] In step five, the calcination temperature of the material in the primary activator is 400℃~800℃.

[0022] In step five, the calcination time of the material in the primary activator is 1s to 10s.

[0023] In step six, the heat preservation residence time of the material in the secondary activator is 1 min to 60 min.

[0024] In step eight, the temperature of the material discharged from the second cooler is <80°C.

[0025] The beneficial effects of this invention are:

[0026] The present invention relates to a calcination and activation lithium extraction device and method for clay-type lithium ore before leaching, which improves the traditional extraction process of clay-type lithium ore. The activated lithium ore product produced using the scheme of the present invention can achieve a leaching rate of >93% (calculated as Li2O3) in the subsequent leaching process. The present invention does not add additives when calcining clay-type lithium ore at high temperature, which can reduce the environmental protection burden of flue gas and leaching slag, and at the same time reduce equipment corrosion. The present invention has a lower temperature when calcining clay-type lithium ore, and the exhaust gas temperature is also lower. The activation process after calcination realizes heat energy recovery and utilization, and the waste heat of high-temperature flue gas and high-temperature materials can be recovered and utilized in stages through fluidization technology, which can further reduce energy consumption. The present invention also has the characteristics of compact structure, high single-unit capacity, high degree of automation, high operating rate, and low labor intensity. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structural principle of a calcination and activation lithium extraction device for clay-type lithium ore before leaching, according to the present invention.

[0028] In the diagram, 1—pre-dryer, 2—preheater, 3—primary activator, 4—activation separator, 5—secondary activator, 6—first cooler, 7—second cooler, 8—denitrification reactor, 9—pre-drying separator, 10—dust collector, 11—induced draft fan, 12—chimney, A—clay-type lithium ore, B—activated lithium ore product, C—normal temperature combustion air, D—preheated combustion air, E—cooling water, F—hot water or steam, G—compressed air, H—dust-laden hot air, I—purified exhaust gas after dust removal, J—fuel, K—denitrification agent, L—lithium-containing dust. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1As shown, a lithium extraction device for calcination and activation before leaching of clay-type lithium ore includes a pre-dryer 1, a preheater 2, a primary activator 3, an activation separator 4, a secondary activator 5, a first cooler 6, a second cooler 7, a denitrification reactor 8, a pre-drying separator 9, a dust collector 10, an induced draft fan 11, and a chimney 12. The feed inlet of the pre-dryer 1 is used to introduce clay-type lithium ore A. The flue gas inlet of the pre-dryer 1 is connected to the flue gas outlet of the denitrification reactor 8. The gas-material mixing outlet of the pre-dryer 1 is connected to the gas-material mixing inlet of the pre-drying separator 9. The discharge outlet of the pre-drying separator 9 is connected to the inlet of the preheater 2. The feed inlet is connected to the feed outlet of the pre-drying separator 9, the flue gas outlet of the pre-drying separator 9 is connected to the flue gas inlet of the dust collector 10, the ash discharge port of the dust collector 10 is connected to the feed inlet of the primary activator 3, the exhaust gas outlet of the dust collector 10 is connected to the air inlet of the induced draft fan 11, the exhaust port of the induced draft fan 11 is connected to the air inlet of the chimney 12, and the exhaust port of the chimney 12 is connected to the atmosphere. The exhaust port of the chimney 12 is used to discharge the purified exhaust gas I after dust removal. The ash discharge port of the dust collector 10 is used to output lithium-containing dust L. The flue gas inlet of the denitrification reactor 8 is connected to the flue gas outlet of the preheater 2, and the flue gas inlet of the preheater 2 is connected to the feed outlet of the primary activator 3. The flue gas outlet of the chemical separator 4 is connected to the preheater 2, the outlet of the preheater 2 is connected to the feed inlet of the primary activator 3, the fuel inlet of the primary activator 3 is used to introduce fuel J, the gas-fuel mixture outlet of the primary activator 3 is connected to the gas-fuel mixture inlet of the activation separator 4, the combustion air inlet of the primary activator 3 is connected to the outlet of the first cooler 6, the inlet of the first cooler 6 is used to introduce ambient temperature combustion air C, and the outlet of the first cooler 6 is used to output preheated combustion air D; the outlet of the activation separator 4 is connected to the feed inlet of the secondary activator 5, and the denitrification agent addition port of the activation separator 4 is used for... The denitrification agent K is introduced; the fluidizing gas inlet of the secondary activator 5 is used to introduce compressed air G; the outlet of the secondary activator 5 is connected to the auxiliary air inlet of the first cooler 6; the outlet of the secondary activator 5 is used to discharge dust-laden hot air H; the discharge outlet of the secondary activator 5 is connected to the feed inlet of the first cooler 6; the discharge outlet of the first cooler 6 is connected to the feed inlet of the second cooler 7; the heat exchange medium inlet of the second cooler 7 is used to introduce cooling water E; the heat exchange medium outlet of the second cooler 7 is used to output hot water or steam F; and the discharge outlet of the second cooler 7 is used to output the activated lithium ore product B.

[0031] In this embodiment, clay-type lithium ore A is lithium chlorite, which is in the form of dry powder or wet powder; denitrification agent K is urea solution or ammonia water; fuel J is in the form of gas, liquid or solid; pre-dryer 1 consists of a vertical riser, venturi or drying and dispersing machine; preheater 2 consists of 1 to 5 stages of cyclone separators; primary activator 3 consists of upper and lower furnace sections and a combustion chamber, the upper furnace section is cylindrical and the lower furnace section is conical with the small opening facing downwards; activation separator 4 uses cyclone separators with multiple denitrification agent addition ports; secondary activator 5 uses a vertical or horizontal activation reactor; primary cooler 6 consists of 1 to 5 stages of cyclone separators; secondary cooler 7 uses a waste heat boiler or fluidized bed cooler; denitrification reactor 8 is equipped with denitrification catalyst; pre-drying separator 9 uses cyclone separators; dust collector 10 uses a bag filter, electrostatic precipitator or electrostatic bag filter; induced draft fan 11 uses a centrifugal induced draft fan.

[0032] A method for using a calcination and activation lithium extraction device before leaching clay-type lithium ore includes the following steps:

[0033] Step 1: Start the induced draft fan 11. The ambient temperature combustion air C enters the first-stage activator 3 through the first cooler 6. At the same time, fuel J is introduced into the first-stage activator 3. The fuel J is ignited in the first-stage activator 3 to achieve ignition. The generated high-temperature flue gas passes sequentially through the activation separator 4, preheater 2, denitrification reactor 8, predryer 1, predrying separator 9, dust collector 10, induced draft fan 11, and chimney 12 before being discharged into the atmosphere. Among them, the temperature of the purified exhaust gas I after dust removal is controlled below 120℃ when it is discharged from the induced draft fan 11 into the chimney 12.

[0034] Step 2: After successful ignition, clay-type lithium ore A is sent into pre-dryer 1, where high-temperature flue gas preheats and dries the clay-type lithium ore A.

[0035] Step 3: After the clay-type lithium ore A is preheated and dried in the pre-dryer 1, it will enter the pre-drying separator 9 along with the high-temperature flue gas. The separated material enters the preheater 2, where the high-temperature flue gas preheats the material again. At the same time, the separated dust-laden flue gas enters the dust collector 10, where the dust collector 10 removes dust from the flue gas. The purified tail gas I after dust removal is discharged into the atmosphere through the induced draft fan 11 and the chimney 12 in sequence.

[0036] Step 4: After the material has completed secondary preheating in the preheater 2, it will enter the primary activator 3 for calcination. At the same time, the lithium dust L collected by the dust collector 10 will also enter the primary activator 3 and be calcined together with the material. Specifically, the high-temperature flue gas generated by combustion first passes through the lower section of the primary activator 3, and then the high-temperature flue gas carries the material into the upper section of the primary activator 3. The speed is slowed down in the upper section of the furnace, and during this period, the material achieves high-temperature calcination.

[0037] Step 5: After the material is calcined in the primary activator 3, it enters the activation separator 4 along with the high-temperature flue gas. Simultaneously, denitrification agent K is introduced into the activation separator 4 to reduce nitrogen oxides in the high-temperature flue gas. The calcination temperature of the material in the primary activator 3 is controlled between 400℃ and 800℃, and the calcination time is controlled between 1s and 10s. Specifically, denitrification agent K is sprayed into the activation separator 4 at multiple points to ensure sufficient contact between denitrification agent K and the high-temperature flue gas, allowing for a full chemical reaction between denitrification agent K and the nitrogen oxides in the high-temperature flue gas. Furthermore, the high-temperature flue gas separated from the activation separator 4 enters the denitrification reactor 8 after passing through the multi-stage cyclone separator of the preheater 2. The denitrification catalyst in the denitrification reactor 8 further removes nitrogen oxides from the high-temperature flue gas, ensuring that the residual amount of denitrification agent meets emission standards.

[0038] Step Six: After the high-temperature flue gas completes denitrification in the activation separator 4, the material and the high-temperature flue gas are separated again. The separated material enters the secondary activator 5, and compressed air G is simultaneously introduced into the secondary activator 5. The compressed air G drives the material into a fluidized state, achieving further activation of the high-temperature material. The heat preservation residence time of the material in the secondary activator 5 is controlled between 1 min and 60 min. Specifically, the material enters a fluidized state under the action of compressed air G, and the high-temperature material has a small temperature drop and a long residence time in the secondary activator 5, ensuring the activation effect of the high-temperature material.

[0039] Step 7: After the high-temperature material is further activated in the secondary activator 5, the generated dust-laden hot air H will enter the first cooler 6 together with the activated high-temperature material, and exchange heat with the ambient temperature combustion air C in the first cooler 6. After the heat exchange is completed, the ambient temperature combustion air C becomes preheated combustion air D and enters the primary activator 3. The high-temperature material is cooled down after the heat exchange is completed. Specifically, the high-temperature material first enters the intermediate stage cyclone through the first stage cyclone of the first cooler 6, and finally exits through the final stage cyclone. The material is cooled down through the multi-stage cyclone cooling process, which improves the cooling effect of the material.

[0040] Step 8: After the high-temperature material completes its initial cooling in the first cooler 6, it will enter the second cooler 7 for secondary cooling. At the same time, cooling water E is introduced into the second cooler 7 and exchanges heat with the cooling water E in the second cooler 7. After the heat exchange is completed, the cooling water E becomes hot water or steam F for resource utilization. The high-temperature material is cooled after the heat exchange is completed until it is discharged from the second cooler 7 and becomes the activated lithium ore product B. The temperature when it is discharged from the second cooler 7 is controlled below 80°C.

[0041] The solutions described in the embodiments are not intended to limit the scope of patent protection of this invention. All equivalent implementations or modifications that do not depart from the scope of this invention are included in the patent scope of this case.

Claims

1. A device for activating lithium extraction from clay-type lithium ore by calcination before leaching, characterized by: The system includes a pre-dryer, a preheater, a primary activator, an activation separator, a secondary activator, a first cooler, a second cooler, a denitrification reactor, a pre-drying separator, a dust collector, an induced draft fan, and a chimney. The pre-dryer's inlet is used to feed clay-type lithium ore. The pre-dryer's flue gas inlet is connected to the denitrification reactor's flue gas outlet. The pre-dryer's gas-material mixing outlet is connected to the pre-drying separator's gas-material mixing inlet. The pre-drying separator's outlet is connected to the preheater's inlet. The pre-drying separator's flue gas outlet is connected to the dust collector. The dust collector's flue gas inlet is connected to the dust collector's ash discharge port, which is connected to the feed inlet of the primary activator. The dust collector's exhaust outlet is connected to the induced draft fan's inlet, the induced draft fan's outlet is connected to the chimney's inlet, and the chimney's exhaust outlet is connected to the atmosphere. The chimney's exhaust outlet is used to discharge the purified exhaust gas after dust removal. The dust collector's ash discharge port is used to output lithium-containing dust. The denitrification reactor's flue gas inlet is connected to the preheater's flue gas outlet, and the preheater's flue gas inlet is connected to the activation separator's flue gas outlet. The discharge port is connected to the feed port of the primary activator, the fuel inlet of the primary activator is used to receive fuel, the gas-fuel mixing outlet of the primary activator is connected to the gas-fuel mixing inlet of the activation separator, the combustion air inlet of the primary activator is connected to the outlet of the first cooler, the inlet of the first cooler is used to introduce ambient temperature combustion air, and the outlet of the first cooler is used to output preheated combustion air; the discharge port of the activation separator is connected to the feed port of the secondary activator, and the denitrification agent addition port of the activation separator is used to introduce denitrification agent; the fluidizing gas inlet of the secondary activator is used to introduce compressed air, the outlet of the secondary activator is connected to the auxiliary air inlet of the first cooler, and the outlet of the secondary activator is used to discharge dust-laden hot air; the discharge port of the secondary activator is connected to the feed port of the first cooler, the discharge port of the first cooler is connected to the inlet of the second cooler, the heat exchange medium inlet of the second cooler is used to introduce cooling water, the heat exchange medium outlet of the second cooler is used to output hot water or steam, and the discharge port of the second cooler is used to output activated lithium ore products.

2. The method of using the calcination and activation lithium extraction device before leaching of clay-type lithium ore as described in claim 1, characterized in that... Includes the following steps: Step 1: Start the induced draft fan. The ambient temperature combustion air enters the first stage activator through the first cooler. At the same time, the fuel is introduced into the first stage activator. The fuel is ignited in the first stage activator to achieve ignition. The generated high temperature flue gas passes through the activation separator, preheater, denitrification reactor, predryer, predrying separator, dust collector, induced draft fan and chimney and is discharged into the atmosphere. Step 2: After successful ignition, the clay-type lithium ore is sent into the pre-dryer, where it is preheated and dried by high-temperature flue gas. Step 3: After the clay-type lithium ore has been preheated and dried in the pre-dryer, it will enter the pre-drying separator along with the high-temperature flue gas. The separated material will enter the preheater, where the high-temperature flue gas will preheat the material again. At the same time, the separated dust-laden flue gas will enter the dust collector, where the dust collector will remove dust from the flue gas. The purified exhaust gas after dust removal will be discharged into the atmosphere through the induced draft fan and the chimney. Step 4: After the material has completed secondary preheating in the preheater, it will enter the primary activator for calcination; at the same time, the lithium-containing dust collected by the dust collector will also enter the primary activator together with the material for calcination. Step 5: After the material is calcined in the primary activator, it will enter the activation separator along with the high-temperature flue gas. At the same time, a denitrification agent will be introduced into the activation separator to reduce nitrogen oxides in the high-temperature flue gas. Step Six: After the high-temperature flue gas completes denitrification in the activation separator, the material and the high-temperature flue gas are separated again. The separated material enters the secondary activator, and compressed air is introduced into the secondary activator at the same time. The compressed air drives the material into a fluidized state, thereby achieving further activation of the high-temperature material. Step 7: After the high-temperature material is further activated in the secondary activator, the generated dust-laden hot air will enter the first cooler together with the activated high-temperature material and exchange heat with the room temperature combustion air in the first cooler. After the heat exchange is completed, the room temperature combustion air becomes preheated combustion air and enters the primary activator. After the heat exchange is completed, the high-temperature material is cooled down. Step 8: After the high-temperature material completes its initial cooling in the first cooler, it will enter the second cooler for secondary cooling. At the same time, cooling water is introduced into the second cooler and exchanges heat with the cooling water. After the heat exchange is completed, the cooling water becomes hot water or steam for resource utilization. After the heat exchange is completed, the high-temperature material is cooled down until it is discharged from the second cooler and becomes an activated lithium ore product.

3. The method of using the calcination and activation lithium extraction device before leaching of clay-type lithium ore according to claim 2, characterized in that: In step one, the temperature of the purified exhaust gas after dust removal is ≤120℃ when it is discharged from the induced draft fan into the chimney.

4. The method of using the calcination and activation lithium extraction device before leaching of clay-type lithium ore according to claim 2, characterized in that: In step five, the calcination temperature of the material in the primary activator is 400℃~800℃.

5. The method of using the calcination and activation lithium extraction device before leaching clay-type lithium ore according to claim 2, characterized in that: In step five, the calcination time of the material in the primary activator is 1s to 10s.

6. The method of using the calcination and activation lithium extraction device before leaching of clay-type lithium ore according to claim 2, characterized in that: In step six, the heat preservation residence time of the material in the secondary activator is 1 min to 60 min.

7. The method of using the calcination and activation lithium extraction device before leaching clay-type lithium ore according to claim 2, characterized in that: In step six, the temperature of the material discharged from the second cooler is <80°C.

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