CN111850290A - Rare earth waste airflow mill oxygen-enriched roasting device and use method thereof - Google Patents
Rare earth waste airflow mill oxygen-enriched roasting device and use method thereof Download PDFInfo
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- CN111850290A CN111850290A CN202010775882.4A CN202010775882A CN111850290A CN 111850290 A CN111850290 A CN 111850290A CN 202010775882 A CN202010775882 A CN 202010775882A CN 111850290 A CN111850290 A CN 111850290A
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Abstract
The invention discloses a rare earth waste airflow mill oxygen enrichment roasting device which comprises a roasting furnace, wherein the roasting furnace is arranged on a supporting device, the supporting device comprises a supporting seat and a rotating disk, the rotating disk is arranged on the supporting seat, the roasting furnace is arranged at the upper end of the supporting seat, a driving device is arranged on one side of the rotating disk, the driving device comprises a transmission gear, the transmission gear is connected with a motor through a rotating tooth, the motor is arranged on a supporting seat on one side of the supporting seat, an oxygen enrichment ventilating device is arranged on a furnace wall arranged on one side of the roasting furnace, the oxygen enrichment ventilating device comprises a plurality of oxygen enrichment bolts and oxygen enrichment ventilating pipes, the rare earth waste airflow mill oxygen enrichment roasting device can accelerate the treatment of waste materials, improve the oxidation efficiency under high oxygen concentration in the roasting furnace, and ensure that rare earth waste materials in the roasting furnace are fully mixed with, the oxidation effect is better and thorough, thereby greatly improving the comprehensive utilization rate of metal.
Description
Technical Field
The invention relates to the technical field of rare earth processing, in particular to a rare earth waste airflow mill oxygen enrichment roasting device and a using method thereof.
Background
The rare earth resources in China are rich, the reserves of the rare earth resources are the first in the world, and the rare earth mineral products in China already occupy the vast majority of the yield in the world. After years of development of the rare earth industry in China, the rare earth industry has achieved a great deal of achievements and causes serious pollution, meanwhile, because the mining amount is large, some rare earth mines are exhausted, in order to reduce the mining of rare earth, the recycling of rare earth waste is improved, but the recycling process needs to be carried out in multiple stages, the waste is ground in advance, the rare earth waste is recycled after being transferred to roasting through multi-process operation, a large amount of manpower and material resources are wasted, the recycling rate is not high, waste phenomenon also occurs in each flow, the recovery function of the rare earth is greatly reduced, and in the common roasting oxidation, the low oxidation utilization rate and the high oxidation difficulty are also the reasons of serious rare earth waste at the present stage, however, with the large exploitation of rare earth resources in China, the storage capacity is continuously reduced, and equipment capable of improving the rare earth oxidation efficiency and the utilization rate is required to be designed.
Disclosure of Invention
The invention aims to provide a rare earth waste airflow milling oxygen-enriched roasting device and a using method thereof, which are used for solving the problems in the background technology, and can accelerate the treatment of waste, improve the oxidation efficiency under high oxygen concentration in a roasting furnace, fully mix and react rare earth waste in the roasting furnace with oxygen, and have better and thorough oxidation effect, thereby greatly improving the comprehensive utilization rate of metal, refining secondary oxidation roasting particles, removing a ball milling process flow, and improving the oxidation rate, thereby being based on improving the acid dissolution leaching efficiency in the later period.
In order to achieve the purpose, the invention provides the following technical scheme: the rare earth waste airflow mill oxygen enrichment roasting device comprises a roasting furnace, wherein the roasting furnace is arranged on a supporting device, the supporting device comprises a supporting seat and a rotating disk, the rotating disk is arranged on the supporting seat, the roasting furnace is arranged at the upper end of the supporting seat, a driving device is arranged on one side of the rotating disk, the driving device comprises a transmission gear, the transmission gear is connected with a motor through rotating teeth, the motor is arranged on a support on one side of the supporting seat, an oxygen enrichment ventilating device is arranged on a furnace wall arranged on one side of the roasting furnace and comprises a plurality of oxygen enrichment bolts and oxygen enrichment ventilating pipes, the oxygen enrichment bolts are fixedly connected with the oxygen enrichment ventilating pipes, an inner waste material feeding port is arranged at the upper end of the roasting furnace, an abrasive device is arranged in the waste material feeding port, the grinding roller is installed on the waste material feeding hole, one side of the grinding device is provided with a hydrolysis device, the hydrolysis device comprises a water cutter, and the water cutter is installed on one side of the waste material feeding hole; the driving device installed on the roasting furnace can rotate the roasting furnace when the roasting furnace is not used or maintained, the dressing and ventilation device can be detached, the oxygen content in the roasting furnace can be improved through the oxygen-enriched ventilation device in the use process, the oxidation of rare earth waste is accelerated by improving the oxygen content, the oxygen-enriched ventilation pipe is a high-pressure ventilation pipe, the oxygen-enriched channel can be ensured not to be blocked by the rare earth waste in the oxidation process, and the smoothness of oxygen-enriched ventilation is kept.
Preferably, the oxygen-enriched vent pipe is connected with an air passage on the furnace wall through an oxygen-enriched bolt, an oxygen blowing pipe is installed in the air passage, and the oxygen blowing pipe is in threaded connection with the air passage; through the oxygen boosting bolt with oxygen boosting breather pipe with bake burning furnace and be connected, wherein the oxygen boosting breather pipe is metal collapsible tube, be convenient for when maintaining rotatoryly, the oxygen boosting breather pipe can follow the rotation, and has thermal-insulated effect.
Preferably, the oxygen blowing pipe comprises an oxygen blowing outer pipe and an oxygen blowing inner pipe, the front end of the oxygen blowing outer pipe is welded on the oxygen blowing outer pipe through a baffle, the front end of the oxygen blowing inner pipe is embedded and connected to the inner wall of the oxygen blowing outer pipe through a support, the rear end of the oxygen blowing outer pipe is in threaded connection with the rear end of the oxygen blowing inner pipe, and the oxygen blowing outer pipe is connected to the air duct; when the high-pressure blowing of the oxygen blowing pipe is carried out, partial rare earth is prevented from entering the oxygen blowing outer pipe and the oxygen blowing inner pipe, the front end of the oxygen blowing inner pipe is provided with a baffle plate to prevent the rare earth from entering, the oxygen blowing inner pipe is communicated with the oxygen-enriched ventilating pipe to complete butt joint, and a plurality of oxygen holes arranged through the oxygen blowing outer pipe complete oxygen-enriched ventilation to the roasting furnace.
Preferably, the plurality of abrasive rollers comprise a first abrasive roller, a second abrasive roller and a third abrasive roller, the first abrasive roller is installed in the middle of the waste material feeding hole, and the second abrasive roller and the third abrasive roller are respectively arranged on two sides of the first abrasive roller in a mirror image manner; the rare earth waste is ground by the grinding teeth of the grinding roller in the rotation process, so that the oxidation efficiency of the rare earth waste is improved.
Preferably, the water cutter comprises a first water cutting head and a second water cutting head, the first water cutting head is mounted at the waste material feeding ports on two sides between the first abrasive roller and the second abrasive roller, and the second water cutting head is mounted at the waste material feeding ports on two sides between the first abrasive roller and the third abrasive roller; install the grinding of cutting the bold tombarthite and accelerating the abrasive roll between the abrasive roll through first water cutting head and second water cutting head, the abrasive feed rate has been improved, water that first water cutting head and second water cutting head jetted simultaneously can get into high temperature roasting furnace in, decompose into hydrogen and oxygen with water through high temperature, the oxidizing power of tombarthite waste material is accelerated in the burning through hydrogen, oxygen can improve the oxygen content of roasting furnace through oxygen simultaneously, further improvement tombarthite oxidation rate.
Preferably, the water cutter further comprises a high-pressure water pump pipe, a high-pressure air pump pipe and rare earth cutting particles, wherein the high-pressure water pump pipe and the high-pressure air pump pipe are mounted at one end of each of the first water cutting head and the second water cutting head, and the rare earth cutting particles are blown into the first water cutting head and the second water cutting head through the high-pressure air pump pipes; the cooperation of the high pressure water pump pipe and the high pressure air pump pipe of water cutting ware installation improves cutting speed, simultaneously for guaranteeing cutting quality and reducing the increase of impurity when the cutting, uses the cutting medium of function tombarthite cutting granule, reduces the increase to oxidation impurity.
The use method of the rare earth waste airflow milling oxygen-enriched roasting device comprises the following steps:
s1: rare earth waste enters the roasting furnace through a feed inlet at the upper end of the roasting furnace, in the entering process, in order to ensure the roasting speed of the roasting furnace, an abrasive device is arranged in a roasting port, the rare earth waste is ground through abrasive teeth arranged on a first abrasive roller, a second abrasive roller and a third abrasive roller of the abrasive device, hydrolysis devices are respectively arranged between the first abrasive roller and the second abrasive roller and between the first abrasive roller and the third abrasive roller so as to accelerate the speed of the abrasive, and a first water cutting head and a second water cutting head on the hydrolysis devices cut the rare earth waste passing through the abrasive device and can quickly enter the roasting furnace through the abrasive device;
s2: in the cutting process, a cutting high-pressure water pump pipe and a cutting high-pressure air pump are required to be controlled, the cutting speed of the rare earth waste is increased, the oxidizing capability of the roasting furnace is further accelerated, rare earth cutting particles are input into the high-pressure air pump pipe in the process, the oxidizing purity of the rare earth waste can be improved, and other impurities can be reduced from entering the roasting furnace;
s3: the oxygen-enriched ventilating device conveys high oxygen-enriched oxygen to the roasting furnace through the oxygen-enriched ventilating pipe in the ventilating passage while feeding is carried out at the feed port at the upper end, so that the oxidation efficiency of the rare earth waste material under the environment of oxygen enrichment and high temperature is improved, and the oxidation work of the rare earth waste material is completed.
Compared with the prior art, the invention has the beneficial effects that:
(1) the driving device arranged on the roasting furnace can rotate the roasting furnace when the roasting furnace is not used or maintained, the dressing and ventilating device can be guaranteed to be disassembled, and the oxygen content in the roasting furnace can be improved through the oxygen-enriched ventilating device in the using process.
(2) Through the oxygen boosting bolt with oxygen boosting breather pipe with bake burning furnace and be connected, wherein the oxygen boosting breather pipe is metal collapsible tube, be convenient for when maintaining rotatoryly, the oxygen boosting breather pipe can follow the rotation, and has thermal-insulated effect.
(3) Install the grinding of cutting the bold tombarthite and accelerating the abrasive roll between the abrasive roll through first water cutting head and second water cutting head, the abrasive feed rate has been improved, water that first water cutting head and second water cutting head jetted simultaneously can get into high temperature roasting furnace in, decompose into hydrogen and oxygen with water through high temperature, the oxidizing power of tombarthite waste material is accelerated in the burning through hydrogen, oxygen can improve the oxygen content of roasting furnace through oxygen simultaneously, further improvement tombarthite oxidation rate.
(4) The cooperation of the high pressure water pump pipe and the high pressure air pump pipe of water cutting ware installation improves cutting speed, simultaneously for guaranteeing cutting quality and reducing the increase of impurity when the cutting, uses the cutting medium of function tombarthite cutting granule, reduces the increase to oxidation impurity.
(5) Can accelerate the processing to the waste material through the device, improve the oxidation efficiency under the high oxygen concentration in the roasting furnace, make the tombarthite waste material in the roasting furnace fully react with the oxygen mixture, the oxidation effect is better thorough to promote the comprehensive utilization ratio of metal by a wide margin, refine secondary oxidation calcination granule, get rid of ball-milling process flow, improve the oxidation rate, thereby do the basis for the later stage improves acid-soluble leaching efficiency.
Drawings
FIG. 1 is a schematic view of the structural principle of the jet mill oxygen-enriched roasting device of the present invention.
FIG. 2 is a side view of the structure of the jet mill oxygen-enriched roasting device of the present invention.
FIG. 3 is a schematic view of the structure of the abrasive device and the hydrolysis device of the present invention.
FIG. 4 is a schematic view of the structure of the oxygen lance of the present invention.
Reference numerals: 1. the device comprises a roasting furnace, 2, a supporting device, 3, a supporting seat, 4, a rotating disk, 5, a driving device, 6, a transmission gear, 7, rotating teeth, 8, a motor, 9, a supporting seat, 10, an oxygen-enriched ventilating device, 11, an oxygen-enriched bolt, 12, an oxygen-enriched ventilating pipe, 13, a waste material feeding hole, 14, an abrasive device, 15, a hydrolysis device, 16, a water cutter, 17, an oxygen blowing pipe, 18, an oxygen blowing outer pipe, 19, an oxygen blowing inner pipe, 20, a baffle, 21, an oxygen introducing hole, 22, a first abrasive roller, 23, a second abrasive roller, 24, a third abrasive roller, 25, a first water cutting head, 26, a second water cutting head, 27, a high-pressure water pump pipe, 28, a high-pressure air pump pipe, 29 and abrasive teeth.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1 and 2, an oxygen-enriched roasting device for rare earth waste airflow mill comprises a roasting furnace 1, wherein the roasting furnace 1 is mounted on a supporting device 2, the supporting device 2 comprises a supporting seat 3 and a rotating disk 4, the rotating disk 4 is mounted on the supporting seat 3, the roasting furnace 1 is mounted at the upper end of the supporting seat 3, a driving device 5 is arranged on one side of the rotating disk 4, the driving device 5 comprises a transmission gear 6, the transmission gear 6 is connected with a motor 8 through a rotating tooth 7, the motor 8 is mounted on a support 9 on one side of the supporting seat 3, an oxygen-enriched ventilating device 10 is arranged on the furnace wall on one side of the roasting furnace 1, the oxygen-enriched ventilating device 10 comprises a plurality of oxygen-enriched bolts 11 and oxygen-enriched ventilating pipes 12, the oxygen-enriched bolts 11 are fixedly connected with the oxygen-enriched ventilating pipes 12, an abrasive device 14 is arranged in the waste material inlet 13, the abrasive device 14 comprises a plurality of abrasive rollers, the abrasive rollers are mounted on the waste material inlet 13, a hydrolysis device 15 is mounted on one side of the abrasive device 14, the hydrolysis device 15 comprises a water cutter 16, and the water cutter 16 is mounted on one side of the waste material inlet 13; drive arrangement 5 through roasting the stove 1 and go up the installation can be with roasting the stove 1 nonuse or rotate when maintaining over a slow fire, guarantee that oxygen boosting air breather 10 can dismantle, can improve the oxygen content of roasting the stove 1 in through oxygen boosting air breather 10 in the use, accelerate the oxidation of tombarthite waste material through improving the oxygen content, oxygen boosting breather pipe 10 is high-pressure vent pipe, can guarantee that the oxygen boosting passageway is not blockked up by tombarthite waste material in the oxidation process, keep the smooth and easy of oxygen boosting ventilation.
The oxygen-enriched vent pipe 10 is connected with an air passage on the furnace wall through an oxygen-enriched bolt 11, an oxygen blowing pipe 17 is installed in the air passage, and the oxygen blowing pipe 17 is in threaded connection with the air passage; through oxygen boosting bolt 11 with oxygen boosting breather pipe 10 with bake burning furnace 1 and be connected, wherein oxygen boosting breather pipe 10 is metal collapsible tube, when being convenient for maintain rotatoryly, oxygen boosting breather pipe 10 can follow the rotation, and has thermal-insulated effect.
As shown in fig. 4, the oxygen lance 17 comprises an outer oxygen lance 18 and an inner oxygen lance 19, the front end of the outer oxygen lance 18 is welded to the outer oxygen lance 18 through a baffle 20, the front end of the inner oxygen lance 19 is connected to the inner wall of the outer oxygen lance 18 through a strut 20 in an embedded manner, the rear end of the outer oxygen lance 18 is connected with the rear end of the inner oxygen lance 19 in a threaded manner, and the outer oxygen lance 18 is connected to the airway; when the oxygen blowing pipe 17 is blown at high pressure, partial rare earth is prevented from entering the oxygen blowing outer pipe 18 and the oxygen blowing inner pipe 19, the front end of the oxygen blowing inner pipe 19 is provided with a baffle 20 to prevent rare earth from entering, the oxygen blowing inner pipe 19 is communicated with the oxygen-enriched vent pipe 10 to complete butt joint, and oxygen-enriched ventilation to the roasting furnace 1 is completed through a plurality of oxygen-enriched holes 21 arranged on the oxygen blowing outer pipe 18.
As shown in fig. 3, the plurality of abrasive rollers include a first abrasive roller 22, a second abrasive roller 23 and a third abrasive roller 24, the first abrasive roller 22 is installed at a middle position of the scrap feed inlet 13, and the second abrasive roller 23 and the third abrasive roller 24 are respectively arranged on two sides of the first abrasive roller 22 in a mirror image manner; the grinding of the rare earth scrap by the grinding teeth 29 of the grinding roll during rotation improves the efficiency of the oxidation of the rare earth scrap.
As shown in fig. 3, the water cutter 16 includes a first water cutting head 25 and a second water cutting head 26, the first water cutting head 25 is installed at the waste material feed opening 13 between the first abrasive roll 22 and the second abrasive roll 23 on both sides, and the second water cutting head 26 is installed at the waste material feed opening 13 between the first abrasive roll 22 and the third abrasive roll 24 on both sides; install through first water cutting head 25 and second water cutting head 26 and cut the grinding of accelerating the abrasive roll with bold tombarthite between the abrasive roll, abrasive feed rate has been improved, water that first water cutting head 25 and second water cutting head 26 sprayed simultaneously can get into the high temperature roasting furnace in, decompose into hydrogen and oxygen with water through high temperature, accelerate the oxidability of tombarthite waste material through the burning of hydrogen, oxygen can improve the oxygen content of roasting furnace through oxygen simultaneously, further improvement tombarthite oxidation rate.
The water cutter 16 further comprises a high-pressure water pump pipe 27, a high-pressure air pump pipe 28 and rare earth cutting particles, wherein the high-pressure water pump pipe 27 and the high-pressure air pump pipe 28 are mounted at one end of each of the first water cutting head 25 and the second water cutting head 26, and the rare earth cutting particles are blown into the first water cutting head 25 and the second water cutting head 26 through the high-pressure air pump pipe 28; the high pressure water pump pipe 27 and the high pressure air pump pipe 28 installed on the water cutter 16 are matched to increase the cutting speed, and meanwhile, in order to ensure the cutting quality and reduce the increase of impurities during cutting, functional rare earth cutting particles are used as cutting media, so that the increase of oxidation impurities is reduced.
The use method of the rare earth waste airflow milling oxygen-enriched roasting device comprises the following steps:
s1: rare earth waste enters the roasting furnace 1 through a feeding hole in the upper end of the roasting furnace 4, in the entering process, in order to ensure the roasting speed of the roasting furnace 1, an abrasive device 14 is arranged in the roasting opening 1, the rare earth waste is ground through abrasive teeth 29 arranged on a first abrasive roller 22, a second abrasive roller 23 and a third abrasive roller 24 of the abrasive device 14, hydrolysis devices 15 are respectively arranged between the first abrasive roller 22 and the second abrasive roller 23 and between the first abrasive roller 22 and the third abrasive roller 24 so as to accelerate the grinding speed, and a first water cutting head 25 and a second water cutting head 26 on the hydrolysis devices 15 are aligned with the rare earth waste passing through the abrasive device 14 for cutting and can rapidly enter the roasting furnace through the abrasive device 14;
s2: in the cutting process, the cutting high-pressure water pump pipe 27 and the high-pressure air pump 28 need to be controlled, the cutting speed of the rare earth waste is increased, the oxidation capacity of the roasting furnace 1 is further accelerated, rare earth cutting particles input into the high-pressure air pump pipe 27 in the process can improve the oxidation purity of the rare earth waste, and other impurities can be reduced from entering the roasting furnace 1;
s3: when feeding is carried out at a feed inlet at the upper end, the oxygen-enriched ventilating device 10 conveys high-pressure oxygen-enriched oxygen to the roasting furnace 1 through the oxygen-enriched ventilating pipe 12 in the ventilating duct, so that the oxidation efficiency of the rare earth waste in an oxygen-enriched and high-temperature environment is improved, and the oxidation work of the rare earth waste is completed.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions are considered to be within the protective scope of the present invention.
Claims (7)
1. The utility model provides a tombarthite waste material jet mill oxygen boosting roasting device, includes bakes burning furnace, its characterized in that, bake burning furnace and install on strutting arrangement over a slow fire, strutting arrangement includes supporting seat and rotary disk, the rotary disk install in on the supporting seat, bake burning furnace is installed to the supporting seat upper end, rotary disk one side is provided with drive arrangement, drive arrangement includes drive gear, drive gear is connected with the motor through rotatory tooth, the motor install in on the support of supporting seat one side, be provided with oxygen boosting breather on the oven of burning furnace one side, oxygen boosting breather includes a plurality of oxygen boosting bolts and oxygen boosting breather pipe, the oxygen boosting bolt with oxygen boosting breather pipe fixed connection, bake burning furnace installs the waste material feed inlet in the upper end, set up abrasive device in the waste material feed inlet, abrasive device includes a plurality, the grinding roller is installed on the waste material feed inlet, a hydrolysis device is installed on one side of the grinding device, the hydrolysis device comprises a water cutter, and the water cutter is installed on one side of the waste material feed inlet.
2. The rare earth waste airflow mill oxygen-enriched roasting device of claim 1, wherein the oxygen-enriched air pipe is connected with an air passage on the furnace wall through an oxygen-enriched bolt, an oxygen blowing pipe is installed in the air passage, and the oxygen blowing pipe is in threaded connection with the air passage.
3. The rare earth waste airflow mill oxygen enrichment roasting device of claim 2, wherein the oxygen blowing pipe comprises an oxygen blowing outer pipe and an oxygen blowing inner pipe, the front end of the oxygen blowing outer pipe is welded on the oxygen blowing outer pipe through a baffle, the front end of the oxygen blowing inner pipe is connected to the inner wall of the oxygen blowing outer pipe in an embedded mode through a support, the rear end of the oxygen blowing outer pipe is in threaded connection with the rear end of the oxygen blowing inner pipe, and the oxygen blowing outer pipe is connected to the air duct.
4. The rare earth waste airflow mill oxygen-enriched roasting device of claim 1, wherein the plurality of abrasive rollers comprise a first abrasive roller, a second abrasive roller and a third abrasive roller, the first abrasive roller is installed in the middle of the waste material inlet, and the second abrasive roller and the third abrasive roller are respectively arranged on two sides of the first abrasive roller in a mirror image mode.
5. The rare earth waste airflow mill oxygen-enriched roasting device as claimed in claims 1 and 4, wherein the water cutter comprises a first water cutting head and a second water cutting head, the first water cutting head is installed at the waste material feeding port on two sides between the first abrasive roller and the second abrasive roller, and the second water cutting head is installed at the waste material feeding port on two sides between the first abrasive roller and the third abrasive roller.
6. The rare earth waste airflow mill oxygen-enriched roasting device of claim 5, wherein the water cutter further comprises a high-pressure water pump pipe, a high-pressure air pump pipe and rare earth cutting particles, the high-pressure water pump pipe and the high-pressure air pump pipe are installed at one end of each of the first water cutting head and the second water cutting head, and the rare earth cutting particles are blown into the first water cutting head and the second water cutting head through the high-pressure air pump pipe.
7. The use method of the rare earth waste airflow mill oxygen-enriched roasting device is characterized in that the rare earth waste airflow mill oxygen-enriched roasting device is the rare earth waste airflow mill oxygen-enriched roasting device in any one of claims 1 to 5, and comprises the following steps:
s1: rare earth waste enters the roasting furnace through a feed inlet at the upper end of the roasting furnace, in the entering process, in order to ensure the roasting speed of the roasting furnace, an abrasive device is arranged in a roasting port, the rare earth waste is ground through abrasive teeth arranged on a first abrasive roller, a second abrasive roller and a third abrasive roller of the abrasive device, hydrolysis devices are respectively arranged between the first abrasive roller and the second abrasive roller and between the first abrasive roller and the third abrasive roller so as to accelerate the speed of the abrasive, and a first water cutting head and a second water cutting head on the hydrolysis devices cut the rare earth waste which passes through the abrasive device, so that the rare earth waste can rapidly enter the roasting furnace through the abrasive device;
s2: in the cutting process, a cutting high-pressure water pump pipe and a cutting high-pressure air pump are required to be controlled, the cutting speed of the rare earth waste is increased, the oxidizing capability of the roasting furnace is further accelerated, rare earth cutting particles are input into the high-pressure air pump pipe in the process, the oxidizing purity of the rare earth waste can be improved, and other impurities can be reduced from entering the roasting furnace;
s3: the oxygen-enriched ventilating device conveys high oxygen-enriched oxygen to the roasting furnace through the oxygen-enriched ventilating pipe in the ventilating passage while feeding is carried out at the feed port at the upper end, so that the oxidation efficiency of the rare earth waste material under the environment of oxygen enrichment and high temperature is improved, and the oxidation work of the rare earth waste material is completed.
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Effective date of registration: 20210407 Address after: 341700 Fukang Industrial Park, Longnan economic and Technological Development Zone, Longnan City, Ganzhou City, Jiangxi Province Applicant after: Longnan Youli Rare Earth Technology Development Co.,Ltd. Address before: 341700 Fukang Industrial Park, Dongjiang Township, Longnan economic and Technological Development Zone, Longnan County, Ganzhou City, Jiangxi Province Applicant before: LONGNAN COUNTY YURAN TECHNOLOGY Co.,Ltd. |
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