Coal gangue roasting activation device

Abstract

The utility model discloses a coal gangue roasting activation device, which relates to the technical field of mineral processing and mainly comprises a roasting main furnace, a drying mixer, a staying tank and a cyclone cooler, an outlet of the roasting main furnace is communicated with the drying mixer through a secondary high-temperature separator, and an outlet of the drying mixer is communicated with a primary preheating separator. A flue gas outlet of the first-stage preheating separator is communicated with a flue gas treatment system, a discharge port of the first-stage preheating separator is communicated with a roasting main furnace, and the roasting main furnace is used for roasting a coal gangue raw material so as to perform kaolinite crystallization conversion; the second-stage high-temperature separator is communicated with the staying tank, so that the roasted sand enters the staying tank to complete crystal form transformation; a discharge port of the staying groove is communicated with an air inlet of the cyclone cooler, and an air outlet of the cyclone cooler is communicated with the roasting main furnace. According to the utility model, the kaolinite crystal phase can be decomposed into semi-crystalline or amorphous, the chemical reaction activity of the kaolinite crystal phase is improved, and the energy utilization rate can also be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mineral processing, in particular to a gangue roasting and activation device. Background Art

[0002] Coal gangue is a black rock with low carbon content that accompanies coal during the coal formation process. It is waste slag produced in the coal mining production process. Every ton of raw coal produced will produce 0.15 to 0.2 tons of coal gangue. Coal gangue has become one of the industrial wastes with the largest area and the largest cumulative stockpile in my country.

[0003] In some areas, coal gangue contains rich aluminum resources and a large amount of other mineral components such as kaolin that can be used. It is an important inorganic non-metallic resource that can be used, and has the dual attributes of solid waste and resources. At present, the main ways to utilize coal gangue resources are: fuel for power generation, preparation of building materials, purification of kaolin, recovery of pyrite and production of agricultural fertilizers, etc. Coal gangue with low utilization value is used for road construction, land reclamation, backfilling of goafs and subsidence areas, etc.

[0004] Since the aluminum oxide and silicon dioxide in the gangue exist in an ordered kaolinite crystal phase, they have almost no chemical reactivity and are difficult to be directly leached and utilized. They must be subjected to high-temperature activation roasting treatment to decompose the kaolinite crystal phase into amorphous semi-crystalline or amorphous, and then desiliconized to purify aluminum-rich compounds after increasing their chemical reactivity. In the prior art, a roasting furnace is usually simply set up to roast the gangue, and the roasted material is desiliconized by liquid alkali leaching, but the roasting sand activity is low, and when the gangue is roasted in a roasting furnace, the energy consumption is high, resulting in energy waste.

[0005] Therefore, it is urgent to provide a coal gangue roasting activation device to solve the above problems existing in the prior art. Utility Model Content

[0006] The utility model aims to provide a coal gangue roasting activation device to solve the problems existing in the above-mentioned prior art, which can decompose the kaolinite crystalline phase into semi-crystalline or amorphous phase, improve its chemical reaction activity, and also improve energy utilization.

[0007] To achieve the above purpose, the utility model provides the following solutions:

[0008] The utility model provides a coal gangue roasting activation device, comprising a roasting main furnace, a drying mixer, a primary preheating separator, a flue gas treatment system, a secondary high-temperature separator, a retention tank and a cyclone cooler, wherein the feed port of the drying mixer is used to add coal gangue raw materials, the outlet of the roasting main furnace is connected with the inlet of the secondary high-temperature separator, the flue gas outlet of the secondary high-temperature separator is connected with the flue gas inlet of the drying mixer, so that the flue gas is passed into the drying mixer to dry and preheat the coal gangue raw materials; the outlet of the drying mixer is connected with the inlet of the primary preheating separator, so that the coal gangue raw materials after drying and preheating enter the primary preheating separator together with the flue gas for gas-solid separation, and the flue gas outlet of the primary preheating separator It is connected to the flue gas treatment system, and the discharge port of the first-level preheating separator is connected to the feed port of the main roasting furnace. The main roasting furnace is used to calcine the coal gangue raw material to carry out kaolinite crystallization transformation; the second-level high-temperature separator is used to perform gas-solid separation on the roasted sand formed by calcination, and the discharge port of the second-level high-temperature separator is connected to the feed port of the retention tank, so that the roasted sand enters the retention tank to complete the crystal transformation; the air inlet of the cyclone cooler is used to introduce air, and the discharge port of the retention tank is connected to the air inlet of the cyclone cooler, so that the roasted sand enters the cyclone cooler for cooling, and the air outlet of the cyclone cooler is connected to the air inlet of the main roasting furnace, so that the heated air enters the main roasting furnace.

[0009] Preferably, the flue gas treatment system includes a dust collector, an induced draft fan and a chimney which are connected in sequence, the flue gas inlet of the dust collector can be connected to the flue gas outlet of the primary preheating separator, and the dust exhaust port of the dust collector is connected to the air inlet of the cyclone cooler.

[0010] Preferably, the main roasting furnace is also provided with a denitrification agent feeding port for adding denitrification agent to reduce nitrogen oxides in the flue gas;

[0011] A denitration reactor is also provided between the primary preheating separator and the flue gas treatment system for removing nitrogen oxides from the flue gas.

[0012] Preferably, the retention tank comprises an air-filled chamber and a material chamber, the material chamber is located above the air-filled chamber, and the feed port of the material chamber is communicated with the discharge port of the secondary high-temperature separator, and the discharge port of the material chamber is communicated with the air inlet of the cyclone cooler;

[0013] The inflation chamber is connected to the material chamber via a vent, and the inflation chamber is connected to a fluidizing fan for introducing gas.

[0014] Preferably, three cyclone coolers are provided, namely a first-stage cyclone cooler, a second-stage cyclone cooler and a third-stage cyclone cooler; wherein, the discharge port of the retention tank is communicated with the air inlet of the first-stage cyclone cooler, and the air inlet of the first-stage cyclone cooler is also communicated with the air outlet of the second-stage cyclone cooler, the air outlet of the first-stage cyclone cooler is communicated with the air inlet of the main roasting furnace, and the discharge port of the first-stage cyclone cooler is communicated with the air inlet of the second-stage cyclone cooler; the air inlet of the second-stage cyclone cooler is also communicated with the air outlet of the third-stage cyclone cooler, and the discharge port of the second-stage cyclone cooler is communicated with the air inlet of the third-stage cyclone cooler; the air inlet of the third-stage cyclone cooler is used for introducing air.

[0015] Preferably, a cooler is also included, the discharge port of the three-stage cyclone cooler is connected to the feed port of the cooler, the discharge port of the cooler is used to deliver the material to the user, and the water inlet of the cooler is used to introduce the cooling medium;

[0016] A first waste heat recovery device is also arranged between the secondary high-temperature separator and the dry mixer, and a second waste heat recovery device is also arranged between the primary preheating separator and the flue gas treatment system. The water outlet of the cooler is connected to the water inlet of the second waste heat recovery device, and the steam outlet of the second waste heat recovery device is connected to the steam inlet of the first waste heat recovery device. The steam outlet of the first waste heat recovery device is used to output steam.

[0017] Preferably, the first-stage preheating separator, the second-stage high-temperature separator, the first-stage cyclone cooler, the second-stage cyclone cooler and the third-stage cyclone cooler are all cyclone separators, and the interior of the cyclone separator is lined with a temperature-resistant insulation layer, and / or the exterior of the cyclone separator is provided with a thermal insulation layer.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] The utility model calcines the gangue raw material in a roasting main furnace to carry out kaolinite crystal transformation, and arranges a retention tank to complete the crystal transformation of roasted sand formed by calcination, so that the kaolinite crystallization existing between alumina and silicon dioxide in the gangue raw material can be destroyed, and the kaolinite crystal phase is decomposed into an amorphous semi-crystalline or amorphous phase, thereby improving its chemical reaction activity, and then desiliconization is carried out through a liquid alkali leaching method to enrich aluminum-rich compounds, so that the gangue resources can be optimally used, which has a positive effect on the efficient development and utilization of the gangue as an alumina raw material and the solution of abandoned gangue.

[0020] Furthermore, in the utility model, the heat of roasted sand can be recovered through the cyclone cooler to heat the air, and the heated air is transported to the main roasting furnace for utilization, and the flue gas generated after the ignition of the main roasting furnace is used to dry and preheat the coal gangue raw materials, thereby realizing flue gas heat recovery and improving energy utilization. The calorific value of the gangue itself is utilized during the working process, and only a part of the heat needs to be supplemented externally.

[0021] Moreover, the gangue raw material in the utility model can be gangue powder, which is suspended in the primary preheating separator, dry mixer, cyclone cooler, main roasting furnace, etc. The gangue powder has a large contact area with flue gas and air, and the heat transfer is fast, which can further make full use of the heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural principle diagram of the coal gangue roasting activation device in the embodiment of the utility model.

[0024] In the figure: 1-primary preheating separator, 2-drying mixer, 3-denitrification reactor, 4-first waste heat recovery device, 5-secondary high-temperature separator, 6-roasting main furnace, 7-retention tank, 8-primary cyclone cooler, 9-secondary cyclone cooler, 10-third-stage cyclone cooler, 11-cooler, 12-second waste heat recovery device, 13-dust collector, 14-induced draft fan, 15-chimney, 16-fluidizing fan, A-coal gangue raw material, B-roasted sand, C-flue gas, D-denitrification agent, E-dust, F-cooling medium, G-steam, H-fuel, I-room temperature air. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model aims to provide a coal gangue roasting activation device to solve the problems existing in the above-mentioned prior art, which can decompose the kaolinite crystalline phase into semi-crystalline or amorphous phase, improve its chemical reaction activity, and also improve energy utilization.

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Embodiment 1

[0029] like Figure 1 As shown, in this embodiment, a coal gangue roasting activation device is provided, including a primary preheating separator 1, a drying mixer 2, a denitration reactor 3, a first waste heat recovery, a secondary high-temperature separator 5, a roasting main furnace 6, a retention tank 7, a primary cyclone cooler 8, a secondary cyclone cooler 9, a tertiary cyclone cooler 10, a cooler 11, a second waste heat recovery device 12, a dust collector 13, an induced draft fan 14, a chimney 15, etc.; wherein,

[0030] The inlet of the primary preheating separator 1 is connected to the outlet of the drying mixer 2, the flue gas outlet of the primary preheating separator 1 is connected to the flue gas inlet of the denitration reactor 3, and the discharge port is connected to the feed port of the roasting main furnace 6; the flue gas inlet of the drying mixer 2 is connected to the flue gas outlet of the first waste heat recovery device 4, and the feed port is used to add coal gangue raw materials; the flue gas inlet of the first waste heat recovery device 4 is connected to the flue gas outlet of the secondary high-temperature separator 5, the inlet of the secondary high-temperature separator 5 is connected to the outlet of the roasting main furnace 6, and the discharge port of the secondary high-temperature separator 5 is connected to the feed port of the retention tank 7;

[0031] The air inlet of the main roasting furnace 6 is connected to the air outlet of the primary cyclone cooler 8, and the outlet of the main roasting furnace 6 is connected to the inlet of the secondary high-temperature separator 5. The combustion chamber of the main roasting furnace 6 is used to add fuel, and the main roasting furnace 6 is provided with a denitrification agent feeding port for the denitrification agent;

[0032] The air inlet of the first-stage cyclone cooler 8 is connected to the air outlet of the second-stage cyclone cooler 9, and the discharge port is connected to the air inlet of the second-stage cyclone cooler 9; the air inlet of the second-stage cyclone cooler 9 is connected to the air outlet of the third-stage cyclone cooler 10, and the discharge port is connected to the air inlet of the third-stage cyclone cooler 10; the air inlet of the third-stage cyclone cooler 10 is connected to the atmosphere for introducing room temperature air, and the discharge port is connected to the feed port of the cooler 11;

[0033] The discharge port of the cooler 11 is sent to the user, and the water inlet is used to introduce cooling medium, and the heated cooling medium is connected to the water inlet of the second waste heat recovery device 12; the flue gas outlet of the denitration reactor 3 is connected to the flue gas inlet of the second waste heat recovery device 12; the steam outlet of the second waste heat recovery device 12 is connected to the steam inlet of the first waste heat recovery device 4, and the flue gas outlet is connected to the flue gas inlet of the dust collector 13; the flue gas outlet of the dust collector 13 is connected to the flue gas inlet of the induced draft fan 14, and the dust exhaust port is connected to the flue gas inlet of the primary cyclone cooler 8; the flue gas outlet of the induced draft fan 14 is connected to the chimney 15, and the chimney 15 is connected to the atmosphere.

[0034] Further, it should be noted that, in this embodiment, the number of cyclone coolers is preferably three, but is not limited to three, and other numbers of cyclone coolers may be provided according to work requirements.

[0035] In this embodiment, the first-stage preheating separator 1, the second-stage high-temperature separator 5, the first-stage cyclone cooler 8, the second-stage cyclone cooler 9, the third-stage cyclone cooler 10, etc. are all cyclone separators. The cyclone separator with a high working temperature is lined with a temperature-resistant insulation layer, and the cyclone separator with a low working temperature is provided with an insulation layer on the outside.

[0036] In this embodiment, the retention tank 7 is composed of two layers, the lower layer is an inflation chamber, and the upper layer is a material chamber, and the inflation chamber is connected to the material chamber through ventilation holes; specifically, the inflation chamber and the material chamber can be separated by an inflation plate, and a plurality of ventilation holes are provided on the inflation plate for inflating the material chamber, or the inflation chamber and the material chamber are separated by a hood, and ventilation holes are provided in the hood; when the gas is filled into the material chamber through the inflation chamber, the gangue raw material is fluidized and has fluidity in the material chamber.

[0037] This embodiment also provides a method for using the gangue roasting activation device, comprising the following steps:

[0038] Step 1: Start the induced draft fan 14, and the normal temperature air I enters the roasting main furnace 6 through the third-stage cyclone cooler 10, the second-stage cyclone cooler 9, and the first-stage cyclone cooler 8, and at the same time, the fuel H is introduced into the roasting main furnace 6, and the fuel H is ignited in the roasting main furnace 6 to achieve ignition. The hot flue gas generated after the ignition of the roasting main furnace 6 is discharged into the atmosphere through the second-stage high-temperature separator 5, the first waste heat recovery device 4, the dry mixer 2, the first-stage preheating separator 1, the denitration reactor 3, the second waste heat recovery device 12, the dust collector 13, the induced draft fan 14 and the chimney 15 in sequence;

[0039] Step 2: When the temperature of the roasting main furnace 6 meets the requirements for inputting the gangue raw material A, the gangue raw material A is fed into the drying mixer 2. The high-temperature flue gas generated by the ignition of the roasting main furnace 6 passes through the secondary high-temperature separator 5 and the first waste heat recovery device 4. The high-temperature flue gas is cooled to a certain temperature and then enters the drying mixer 2 to dry and preheat the gangue raw material A.

[0040] Step 3: After the gangue raw material A is dried and preheated in the drying mixer 2, it enters the primary preheating separator 1 with the hot flue gas for gas-solid separation. The separated gangue raw material A is sent to the roasting main furnace 6 from the discharge port. The separated flue gas C enters the denitration reactor 3. The flue gas C with nitrogen oxides removed enters the second waste heat recovery device 12 to recover the flue gas heat and cool the flue gas C to a certain temperature before entering the dust collector 13. The flue gas C with dust E removed from the dust collector 13 is sent to the chimney 15 through the induced draft fan 14 and then discharged into the atmosphere;

[0041] Step 4: The gangue raw material A is preheated in the drying mixer 2, the primary preheating separator 1, and the secondary high-temperature separator 5, and after part of the organic matter is burned, it enters the main roasting furnace 6 for calcination, and the unburned organic matter and kaolinite crystal conversion are completed in the main roasting furnace 6;

[0042] Step 5: The gangue raw material A is calcined in the main roasting furnace 6, and the denitrification agent D is introduced into the main roasting furnace 6 to reduce the nitrogen oxides in the flue gas C. The calcined roasted sand B enters the secondary high-temperature separator 5 along with the flue gas C after the nitrogen oxides are removed;

[0043] Step 6: The roasted sand B completes gas-solid separation in the secondary high-temperature separator 5, the hot flue gas discharged from the secondary high-temperature separator 5 enters the first waste heat recovery device 4, and the roasted sand B discharged from the secondary high-temperature separator 5 enters the retention tank 7, where the roasted sand B is blown by the fluidizing air blown by the fluidizing fan and is in a fluidized state;

[0044] Step 7: The roasted sand B further completes the crystal transformation in the retention tank 7. After the crystal transformation is completely completed, the roasted sand B is discharged from the retention tank 7 and enters the primary cyclone cooler 8 for cooling;

[0045] Step 8: The roasted sand B is cooled for the first time in the primary cyclone cooler 8 and the gas-solid separation is completed. The hot air after separation enters the roasting main furnace 6 to participate in the combustion. The roasted sand B after separation enters the secondary cyclone cooler 9;

[0046] Step nine: the roasted sand B is cooled for the second time in the secondary cyclone cooler 9 and the gas-solid separation is completed. The hot air after separation enters the primary cyclone cooler 8, and the roasted sand B after separation enters the tertiary cyclone cooler 10;

[0047] Step 10: The roasted sand B is cooled for the third time by the room temperature air I from the atmosphere in the three-stage cyclone cooler 10 and completes the gas-solid separation. The hot air after separation enters the secondary cyclone cooler 9, and the roasted sand B after separation enters the cooler 11;

[0048] Step 11: The roasted sand B is further cooled in the cooler 11, and the cooled roasted sand B is delivered to the user. The cooling medium F is introduced into the cooler 11, and the heated cooling medium F is delivered to the second waste heat recovery device 12 to further absorb the heat in the flue gas C. The cooling medium F that absorbs the heat of the flue gas is converted into steam G and then enters the first waste heat recovery device 4 to be further heated, and the heated steam G is delivered to the user.

[0049] In this embodiment, in steps 1 to 3, the flue gas discharged from the primary preheating separator 1 is recycled by the second waste heat recovery device 12, and the flue gas temperature after waste heat recovery is 120-140°C;

[0050] In the step 3, the dust refers to fine powder of coal gangue;

[0051] In the step 4, the temperature of the gangue raw material in the secondary high-temperature separator 5 is 950-1100° C., and the temperature of the gangue raw material in the primary preheating separator 1 is 450-550° C.;

[0052] In the step 5, the temperature of the main roasting furnace 6 is 950-1100° C., and the calcination time is 1s-5s;

[0053] In step 5, the heat required for the roasting main furnace 6 is partially provided by the organic matter of the coal gangue itself, and the insufficient heat is supplied by external fuel;

[0054] In the steps 6 to 7, the residence time of the roasted sand in the retention tank 7 is 1 min to 10 min, and the roasted sand is kept at a constant temperature in the retention tank 7 without the need for additional heat input, and the constant temperature is 900 to 1000° C., thereby achieving the purpose of delayed roasting, thereby significantly reducing the roasting temperature of the roasting main furnace 6 by 50 to 100° C., greatly reducing the energy consumption of roasting coal gangue;

[0055] In the steps eight to eleven, the roasted sand is finally cooled to below 80°C;

[0056] In the steps 1 to 11, the gangue raw material is in a suspended state in the primary preheating separator 1, the drying mixer 2, the cyclone cooler, and the main roasting furnace 6, and the contact area between the gangue raw material and the flue gas and air is large, and the heat transfer is fast;

[0057] In the steps eight to eleven, the temperature of the hot air discharged from the primary cyclone cooler 8 is 600-700°C;

[0058] In the steps 1 to 11, the fuel H may be a gas fuel or a liquid fuel, the denitrification agent D may be urea or ammonia water, and the cooling medium F may be desalted water, which is hot water when it leaves the cooler, becomes low-pressure steam when it leaves the second waste heat recovery device 12, and becomes medium-pressure steam when it leaves the first waste heat recovery device 4;

[0059] In the steps 1 to 11, the gangue raw material can be dry gangue powder or wet gangue powder, and the appropriate number of preheating separators can be matched according to its moisture content.

[0060] In summary, the gangue suspension roasting activation furnace device of the utility model has the characteristics of large production capacity, high energy utilization rate, high silicon activity in roasted sand, which is easy to be leached out by liquid alkali to increase the aluminum-silicon ratio, and small footprint. It plays a positive role in the efficient development and utilization of coal gangue as aluminum raw material after purification and the solution of abandoned coal gangue.

[0061] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A coal gangue roasting activation device, characterized in that: The invention comprises a roasting main furnace, a drying mixer, a primary preheating separator, a flue gas treatment system, a secondary high-temperature separator, a retention tank and a cyclone cooler. The feed port of the drying mixer is used to add gangue raw materials. The outlet of the roasting main furnace is connected to the inlet of the secondary high-temperature separator. The flue gas outlet of the secondary high-temperature separator is connected to the flue gas inlet of the drying mixer, so that the flue gas is passed into the drying mixer to dry and preheat the gangue raw materials. The outlet of the drying mixer is connected to the inlet of the primary preheating separator, so that the gangue raw materials after drying and preheating enter the primary preheating separator together with the flue gas for gas-solid separation. The flue gas outlet of the primary preheating separator is connected to the flue gas treatment system. The discharge port of the first-level preheating separator is communicated with the feed port of the main roasting furnace, and the main roasting furnace is used to calcine the coal gangue raw material to carry out kaolinite crystal transformation; the secondary high-temperature separator is used to perform gas-solid separation on the roasted sand formed by calcination, and the discharge port of the secondary high-temperature separator is communicated with the feed port of the retention tank, so that the roasted sand enters the retention tank to complete the crystal transformation; the air inlet of the cyclone cooler is used to introduce air, the discharge port of the retention tank is communicated with the air inlet of the cyclone cooler, so that the roasted sand enters the cyclone cooler for cooling, and the air outlet of the cyclone cooler is communicated with the air inlet of the main roasting furnace, so that the heated air enters the main roasting furnace.

2. The gangue roasting activation device according to claim 1, characterized in that: The flue gas treatment system includes a dust collector, an induced draft fan and a chimney which are connected in sequence. The flue gas inlet of the dust collector can be connected to the flue gas outlet of the primary preheating separator, and the dust discharge outlet of the dust collector is connected to the air inlet of the cyclone cooler.

3. The gangue roasting activation device according to claim 1 or 2, characterized in that: The main roasting furnace is also provided with a denitrification agent feeding port for adding denitrification agent to reduce nitrogen oxides in the flue gas; A denitration reactor is also provided between the primary preheating separator and the flue gas treatment system for removing nitrogen oxides from the flue gas.

4. The gangue roasting activation device according to claim 1, characterized in that: The retention tank includes an air-filled chamber and a material chamber, wherein the material chamber is located above the air-filled chamber, and the feed port of the material chamber is connected to the discharge port of the secondary high-temperature separator, and the discharge port of the material chamber is connected to the air inlet of the cyclone cooler; The inflation chamber is connected to the material chamber via a vent, and the inflation chamber is connected to a fluidizing fan for introducing gas.

5. The gangue roasting activation device according to claim 1, 2 or 4, characterized in that: There are three cyclone coolers, namely a first-stage cyclone cooler, a second-stage cyclone cooler and a third-stage cyclone cooler; wherein, the discharge port of the retention tank is connected to the air inlet of the first-stage cyclone cooler, and the air inlet of the first-stage cyclone cooler is also connected to the air outlet of the second-stage cyclone cooler, the air outlet of the first-stage cyclone cooler is connected to the air inlet of the main roasting furnace, and the discharge port of the first-stage cyclone cooler is connected to the air inlet of the second-stage cyclone cooler; the air inlet of the second-stage cyclone cooler is also connected to the air outlet of the third-stage cyclone cooler, and the discharge port of the second-stage cyclone cooler is connected to the air inlet of the third-stage cyclone cooler; the air inlet of the third-stage cyclone cooler is used for passing air.

6. The gangue roasting activation device according to claim 5, characterized in that: It also includes a cooler, wherein the discharge port of the three-stage cyclone cooler is connected to the feed port of the cooler, the discharge port of the cooler is used to deliver the material to the user, and the water inlet of the cooler is used to introduce the cooling medium; A first waste heat recovery device is also arranged between the secondary high-temperature separator and the dry mixer, and a second waste heat recovery device is also arranged between the primary preheating separator and the flue gas treatment system. The water outlet of the cooler is connected to the water inlet of the second waste heat recovery device, and the steam outlet of the second waste heat recovery device is connected to the steam inlet of the first waste heat recovery device. The steam outlet of the first waste heat recovery device is used to output steam.

7. The gangue roasting activation device according to claim 5, characterized in that: The first-stage preheating separator, the second-stage high-temperature separator, the first-stage cyclone cooler, the second-stage cyclone cooler and the third-stage cyclone cooler are all cyclone separators, and the interior of the cyclone separator is lined with a temperature-resistant insulation layer, and / or the exterior of the cyclone separator is provided with a thermal insulation layer.

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