CN113847789B - Purging and drying system for preventing titanium concentrate from hardening and process method thereof - Google Patents

Purging and drying system for preventing titanium concentrate from hardening and process method thereof Download PDF

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Publication number
CN113847789B
CN113847789B CN202111134616.4A CN202111134616A CN113847789B CN 113847789 B CN113847789 B CN 113847789B CN 202111134616 A CN202111134616 A CN 202111134616A CN 113847789 B CN113847789 B CN 113847789B
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purging
titanium concentrate
flue gas
rotary kiln
pipe
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CN113847789A (en
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齐建玲
李占军
王海波
樊河雲
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Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/02—Applications of driving mechanisms, not covered by another subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

The invention discloses a purging and drying system and a process method for preventing titanium concentrate from hardening, and belongs to the technical field of design and manufacture of metallurgical raw material production equipment. The purging and drying system and the process method for preventing the titanium concentrate from hardening can effectively prevent the titanium concentrate from hardening, so that the drying efficiency of the titanium concentrate is improved. The purging and drying system comprises a pressurizing assembly and a purging mechanism, wherein the purging mechanism can freely rotate around the axial center line of the purging mechanism, is arranged between a main flue gas pipe below a main flue gas pipe in the rotary kiln and a flue gas return pipe, and penetrates through a gas input end of a fixed kiln seat of the rotary kiln to be connected with the pressurizing assembly; in the drying process of the titanium concentrate, the titanium concentrate entering the rotary kiln through the blanking pipe is dispersed and suspended under the cooperation of the pressurized gas with the pressure value of 4000 Pa-5000 Pa output by the blowing mechanism, and the titanium concentrate positioned on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe is separated from the corresponding side wall under the cooperation of the pressurized gas output by the blowing mechanism.

Description

Purging and drying system for preventing titanium concentrate from hardening and process method thereof
Technical Field
The invention relates to a purging and drying system, in particular to a purging and drying system for preventing titanium concentrate from hardening, and belongs to the technical field of design and manufacture of metallurgical raw material production equipment. The invention relates to a process method for blowing and drying titanium concentrate by adopting the blowing and drying system.
Background
The titanium concentrate is obtained by taking tailings of iron-containing composite iron ore after iron separation as raw materials and enriching the tailings after ore separation, and has the following characteristics: the total granularity is fine, but the thickness is uneven, and the proportion of particles smaller than 200 meshes (0.074 mm) reaches more than 75 percent; the material has large water content and is easy to agglomerate, the actual water content entering the dryer in the production process is generally between 9 and 12 percent to 13 percent at the highest; the specific gravity is great, and the true specific gravity reaches 4.30t/m3; poor fluidity, etc.
The titanium slag produced by smelting the titanium concentrate in an electric furnace is the raw material of products such as titanium white, titanium sponge and the like. The titanium concentrate is dried and dehydrated before entering the electric furnace for smelting, otherwise, the explosion accident of the electric furnace is easy to be caused.
As the titanium concentrate has lower boiling points of xanthate, collector, foaming agent and other substances used in the mineral separation process, the flotation agents are decomposed or volatilized due to the overhigh temperature in the drying process, and the smoke gas after drying is discharged to generate a pungent odor, so that the environment is polluted, and the life of people is seriously influenced; therefore, the titanium concentrate cannot be directly dried by using high-temperature flue gas, and can only be dried at low temperature, so that the drying efficiency of the titanium concentrate is limited.
The low-temperature drying of the titanium concentrate is realized by direct drying and indirect drying, the loss of the direct drying titanium concentrate is large, the dust is large, and the production environment is poor; the indirect drying of the titanium concentrate has small loss and is relatively environment-friendly. However, the titanium concentrate has high specific gravity, slides along the inner wall after entering the drying rotary kiln, has fine granularity and high moisture content, is easy to harden on the inner wall of the flue gas return pipe and the drying rotary kiln at the feeding end, increases the equipment load and reduces the production efficiency.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the purging drying system for preventing the titanium concentrate from hardening can effectively prevent the titanium concentrate from hardening, so that the drying efficiency of the titanium concentrate is improved, and a process method for purging and drying the titanium concentrate by adopting the purging drying system are provided.
The technical scheme adopted for solving the technical problems is as follows: the purging and drying system comprises a pressurizing assembly and a purging mechanism, wherein the purging mechanism can freely rotate around an axial center line of the purging mechanism, is arranged between a main flue gas pipe below a main flue gas pipe in a rotary kiln and a flue gas return pipe, and penetrates through a gas input end of a fixed kiln seat of the rotary kiln to be connected with the pressurizing assembly; in the drying process of the titanium concentrate, the titanium concentrate entering the rotary kiln through the blanking pipe is dispersed and suspended under the cooperation of the pressurized gas output by the blowing mechanism, and the titanium concentrate positioned on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe is separated from the corresponding side wall under the cooperation of the pressurized gas output by the blowing mechanism.
Further, the pressurizing assembly is an air compressor.
The preferred mode of above-mentioned scheme is, the purge mechanism include purge ware and rotary joint, the purge ware pass through rotary joint around self axial central line freely rotatable connect on the gas output of pressurization subassembly.
Further, the purging device comprises an air inlet main shaft and a purging structure, wherein the blowing central line of the purging structure and the circular arc-shaped cross section of the air inlet main shaft are arranged on the axial outer side surface of the air inlet main shaft at an included angle of 30 degrees.
The preferable mode of the scheme is that the purging structure is at least two rows of blowing holes arranged on the circular arc-shaped side surface of the air inlet main shaft, and the blowing holes in each row are uniformly distributed along the circumferential direction of the air inlet main shaft.
Further, the purging structure comprises at least two groups of purging fins, wherein each group of purging fins uniformly distributed on the circular arc side surface of the air inlet main shaft along the circumferential direction are arranged at an included angle of 30 degrees with the circular arc-shaped cross section of the air inlet main shaft, and purging holes extending along the length direction are respectively formed in the outer side edge of each group of purging fins.
The preferable mode of the scheme is that the front end surfaces of the purging fins of each group are arranged at an included angle of 15 degrees with the outer side surface of the air inlet main shaft along the axial direction.
Further, the rear end surfaces of the purging fins of each group are arranged at an included angle of 30 degrees with the outer surface of the air inlet main shaft along the axial direction.
Further, the main flue gas pipe of the rotary kiln is axially arranged at the rotation center of the rotary kiln, the flue gas return pipe is circumferentially arranged on the rotary kiln wall outside the main flue gas pipe, the outlet end of the blanking pipe which is obliquely arranged on the fixed kiln seat of the rotary kiln is positioned between the flue gas return pipe and the main flue gas pipe, the distance between the outlet end and the main flue gas pipe is 1-1.5 m, and the axial center line of the main inlet pipe which is arranged between the flue gas return pipe and the main flue gas pipe is coplanar with the axial center line of the blanking pipe in the vertical direction.
The process method is characterized in that the titanium concentrate is input into the rotary kiln through a blanking pipe, meanwhile, the pressure gas with the pressure value of 4000 Pa-5000 Pa is blown out of a blower of the blowing mechanism to enable the titanium concentrate entering the rotary kiln to be in a suspended dispersion state, and the titanium concentrate in the rotary kiln is separated from a flue gas main pipe and the side wall of the rotary kiln to prevent the titanium concentrate from hardening, so that the titanium concentrate is dried.
The beneficial effects of the invention are as follows: the purging and drying system comprises a pressurizing assembly and a purging mechanism, wherein the purging mechanism can freely rotate around the axial center line of the purging mechanism, is arranged between a main flue gas pipe below a main flue gas pipe in the rotary kiln and a flue gas return pipe, and then penetrates through a gas input end of a fixed kiln seat of the rotary kiln to be connected with the pressurizing assembly; in the drying process of the titanium concentrate, the titanium concentrate entering the rotary kiln through the blanking pipe is dispersed and suspended under the cooperation of the pressurized gas output by the blowing mechanism, and the titanium concentrate positioned on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe is separated from the corresponding side wall under the cooperation of the pressurized gas output by the blowing mechanism. Therefore, the titanium concentrate which just enters the rotary kiln is in dispersed suspension, and meanwhile, the titanium concentrate in dispersed suspension is not bonded on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe under the cooperation of the pressurized gas, so that the titanium concentrate can be effectively prevented from being bonded, and the aim of submitting the drying efficiency of the titanium concentrate is fulfilled.
Drawings
FIG. 1 is a schematic diagram of a purge drying system for preventing hardening of a titanium concentrate according to the present invention;
FIG. 2 is a schematic three-dimensional view of a purge unit according to the present invention;
fig. 3 is a transverse cross-sectional view of a purge unit in accordance with the present invention.
Marked in the figure as: the device comprises a pressurizing assembly 1, a purging mechanism 2, a rotary kiln 3, a main flue gas pipe 4, a flue gas return pipe 5, a rotary kiln fixing kiln seat 6, a blanking pipe 7, a purging device 8, a rotary joint 9, an air inlet main shaft 10, a purging structure 11 and purging fins 12.
Detailed Description
The invention provides a purging and drying system for preventing titanium concentrate from hardening, which can effectively prevent the titanium concentrate from hardening so as to improve the drying efficiency of the titanium concentrate, and a process method for purging and drying the titanium concentrate by adopting the purging and drying system, as shown in fig. 1, 2 and 3. The purging and drying system comprises a pressurizing assembly 1 and a purging mechanism 2, wherein the purging mechanism 2 is arranged between a main flue gas pipe 4 below a main flue gas pipe 4 in a rotary kiln 3 and a flue gas return pipe 5 around the axial center line of the purging mechanism 2 and can freely rotate, and the purging mechanism 2 penetrates through a gas input end of a fixed kiln seat 6 of the rotary kiln to be connected with the pressurizing assembly 1; in the drying process of the titanium concentrate, the titanium concentrate entering the rotary kiln 3 through the blanking pipe 7 is dispersed and suspended under the cooperation of the pressurized gas output by the blowing mechanism 2, and the titanium concentrate positioned on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe is separated from the corresponding side wall under the cooperation of the pressurized gas output by the blowing mechanism 2. According to the process method, the titanium concentrate is input into the rotary kiln 3 through the blanking pipe 7, meanwhile, the pressure gas with the pressure value of 4000 Pa-5000 Pa is blown out through the blower 8 of the blower mechanism 2, so that the titanium concentrate entering the rotary kiln 3 is in a suspended dispersion state, and the titanium concentrate in the rotary kiln 3 is separated from the flue gas main pipe 4 and the side wall of the rotary kiln 3 to prevent the titanium concentrate from hardening, so that the titanium concentrate is dried. The purging and drying system comprises a pressurizing assembly and a purging mechanism, wherein the purging mechanism can freely rotate around the axial center line of the purging mechanism, is arranged between a main flue gas pipe below a main flue gas pipe in the rotary kiln and a flue gas return pipe, and then penetrates through a gas input end of a fixed kiln seat of the rotary kiln to be connected with the pressurizing assembly; in the drying process of the titanium concentrate, the titanium concentrate entering the rotary kiln through the blanking pipe is dispersed and suspended under the cooperation of the pressurized gas output by the blowing mechanism, and the titanium concentrate positioned on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe is separated from the corresponding side wall under the cooperation of the pressurized gas output by the blowing mechanism. Therefore, the titanium concentrate which just enters the rotary kiln is in dispersed suspension, and meanwhile, the titanium concentrate in dispersed suspension is not bonded on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe under the cooperation of the pressurized gas, so that the titanium concentrate can be effectively prevented from being bonded, and the aim of submitting the drying efficiency of the titanium concentrate is fulfilled.
In the above embodiment, in order to simplify the structure of the purge drying system described in the present application, the pressurization assembly 1 described in the present application is an air compressor, and common components are adopted as much as possible in the design and manufacturing process. Further, as the main structure of the purging and drying system for enabling the titanium concentrate entering the rotary kiln to be in a dispersed and suspended state, the purging mechanism 2 comprises a purging device 8 and a rotary joint 9, and the purging device 8 is freely rotatably connected to the gas output end of the pressurizing assembly 1 around the axial center line of the rotary joint 9. Correspondingly, the blower 8 comprises an air inlet main shaft 10 and a blowing structure 11, and the blowing center line of the blowing structure 11 and the circular arc-shaped cutting surface of the air inlet main shaft 10 are arranged on the axial outer side surface of the air inlet main shaft 10 at an included angle of 30 degrees. At this time, the blowing structure 11 may be at least two rows of blowing holes disposed on the circular arc side surface of the air inlet spindle, where the blowing holes in each row are uniformly distributed along the circumferential direction of the air inlet spindle; the air inlet main shaft also can comprise at least two groups of purging fins 12, wherein each group of purging fins 12 which are uniformly distributed on the circular arc side surface of the air inlet main shaft along the circumferential direction and the circular arc-shaped cross section of the air inlet main shaft are arranged at an included angle of 30 degrees, and purging holes which extend along the length direction are respectively arranged on the outer side edge of each group of purging fins 12. The front end surfaces of the purging fins 12 of each group are arranged at an included angle of 15 degrees with the outer side surface of the air inlet main shaft 10 along the axial direction. The rear end surfaces of the purging fins 12 of each group are arranged at an included angle of 30 degrees with the outer surface of the air inlet main shaft 10 along the axial direction.
Meanwhile, in order to improve the dispersion and suspension effect of the titanium concentrate entering the rotary kiln, the smoke main pipe 4 of the rotary kiln 3 is axially arranged at the rotation center of the rotary kiln 3, the smoke return pipe 5 is circumferentially arranged on the rotary kiln wall outside the smoke main pipe 4, the outlet end of the blanking pipe 7 which is arranged on the rotary kiln fixing kiln seat and is inclined inwards is located between the smoke return pipe 5 and the smoke main pipe 4, the distance between the outlet end and the smoke main pipe 4 is set between 1-1.5 m, and the axial center line of the air inlet main shaft 10 which is arranged between the smoke return pipe 5 and the smoke main pipe 4 is coplanar with the axial center line of the blanking pipe 7 in the vertical direction.
To sum up, adopt the application to provide a sweep drying system to dry the titanium concentrate, utilize current conventional air compressor to drive the sweep ware rotatory after pressurizing the air, sweep flue gas muffler and dry rotary kiln inner wall, solve the titanium concentrate hardening problem, drying efficiency improves more than 5% at least.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention provides a purging and drying system and method for solving the problem of hardening of titanium concentrate on a flue gas return pipe and the inner wall of a drying device. Solves the problem of hardening of the flue gas return pipe and the inner wall of the rotary kiln, and improves the drying efficiency by more than 5 percent.
The purging and drying system and method for solving the problem that titanium concentrate is hardened in a flue gas return pipe and the inner wall of a rotary kiln are as follows:
1. the blowing device is arranged below the titanium concentrate discharging pipe, the blowing device and the discharging pipe in the vertical direction are arranged on the same vertical plane, and the blowing device and the discharging pipe in the horizontal direction are arranged between the flue gas main pipe and the flue gas return pipe.
2. The purging device is arranged below the flue gas main pipe, the discharging pipe is arranged above the flue gas main pipe, and titanium concentrate entering the rotary kiln from the discharging pipe is conveyed to an area above the flue gas main pipe by the purging device to form a dispersion shape. The distance between the blower and the blanking pipe is 1-1.5 m, so that the titanium concentrate is prevented from being blown back into the blanking pipe by gas, and the blanking is not smooth.
3. The whole fin of the blower and the horizontal surface of the air inlet main shaft form an included angle of 30 degrees, and enough reaction force can be formed with the adjacent area of the rotary kiln to push the blower to rotate. The front end of the fin of the purging device is 15 degrees with the axis of the air inlet main shaft, titanium concentrate is prevented from entering a crack at the front end of the kiln head fixing seat of the rotary kiln, the rear end of the fin of the purging device is 30 degrees with the axis of the air inlet main shaft, and the lengths of the inner wall of the purging rotary kiln and the flue gas return pipe are increased. The purge spindle is hollow and the tip is blocked to prevent gas from being vented from the tip.
4. The rotation direction of the blower is opposite to that of the rotary kiln. The titanium concentrate adhered to the inner wall of the rotary kiln and the surface of the flue gas return pipe is washed and wrapped to enter the upper part of the flue gas main pipe, and the radiation area and the radiation temperature are increased.
5. The rotating air source of the blower is provided by an air compressor, and air is pressurized to 4000 Pa-5000 Pa by the air compressor and enters the blower through a rotating joint.
6. The process that the purge device prevents the titanium concentrate from hardening on the inner wall of the rotary kiln and the surface of the flue gas return pipe is as follows: the air compressor pressurizes air to 4000 Pa-5000 Pa, the air enters the blower through the rotary joint, three hollow fins on the side face of the blower are discharged, the fins rotate under the action force of discharged air, titanium concentrate adhered to the inner wall of the rotary kiln and the surface of the flue gas muffler is flushed and wrapped by the air discharged from the fins on the lower part and the side lower part of the rotary kiln, and when the fins rotate to meet the titanium concentrate entering from the blanking pipe along with the rotation of the fins, the titanium concentrate entering from the blanking pipe is changed into dispersed suspended particles from the cluster by the air discharged from the fins, and the dispersed suspended particles are mixed with the titanium concentrate adhered to the surface of the wrapped titanium concentrate to be brought above the flue gas main pipe for drying. Along with the rotation of the rotary kiln, the front-stage titanium concentrate is dispersed and suspended in the rotary kiln under the action of blowing flue gas, and the titanium concentrate with the middle and rear ends falling back on the inner wall of the rotary kiln loses the bonding effect because of the loss of moisture on the surface, passes through a flue gas return pipe and a flue gas main pipe under the action of an inner wall shoveling plate and then passes through a flue gas return pipe on the other side to fall on the inner wall of the rotary kiln again. Because the rotary kiln is provided with a certain inclination angle, the titanium concentrate moves to the discharge end in the horizontal direction until the titanium concentrate is discharged.
Example 1
Simulating a titanium concentrate drying process in a laboratory, wherein the moisture content of a titanium concentrate feed is 9.1%, the average hour yield of the titanium concentrate before an air compressor-driven distributor is increased by 48.7kg/h, and the moisture content of the dried titanium concentrate is 0.47%; after 1000kg of titanium concentrate is dried, cleaning and weighing (15.1 kg) the inner wall plate of the rotary kiln, adding a distributor driven by an air compressor, wherein the yield of the titanium concentrate reaches 51.3kg/h, the moisture content of the dried titanium concentrate is 0.51%, and the yield is improved by 5.3%; the inner wall of the rotary kiln is smooth.

Claims (7)

1. A purge drying system for preventing hardening of a titanium concentrate, characterized by: the purging and drying system comprises a pressurizing assembly (1) and a purging mechanism (2), wherein the purging mechanism (2) can freely rotate around the axial center line of the purging mechanism, is arranged between a main flue gas pipe (4) below a main flue gas pipe (4) in the rotary kiln (3) and a flue gas return pipe (5), and the purging mechanism (2) penetrates through a gas input end of a fixed kiln seat (6) of the rotary kiln to be connected with the pressurizing assembly (1); in the drying process of the titanium concentrate, the titanium concentrate entering the rotary kiln (3) through the blanking pipe (7) is dispersed and suspended under the cooperation of the pressurized gas output by the blowing mechanism (2), the titanium concentrate positioned on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe is separated from the corresponding side wall under the cooperation of the pressurized gas output by the blowing mechanism (2),
the purging mechanism (2) comprises a purging device (8) and a rotary joint (9), the purging device (8) is connected to the gas output end of the pressurizing assembly (1) in a free rotation way around the axial center line of the purging device (9),
the blower (8) comprises an air inlet main shaft (10) and a blowing structure (11), wherein the blowing center line of the blowing structure (11) and the circular arc-shaped cross section of the air inlet main shaft (10) are arranged on the axial outer side surface of the air inlet main shaft (10) at an included angle of 30 degrees,
the purging structure (11) comprises at least two groups of purging fins (12), wherein each group of purging fins (12) uniformly distributed on the circular arc side surface of the air inlet main shaft along the circumferential direction are arranged at an included angle of 30 degrees with the circular arc cross section of the air inlet main shaft, and purging holes extending along the length direction are respectively formed in the outer side edge of each group of purging fins (12).
2. The purge drying system for preventing hardening of a titanium concentrate according to claim 1, wherein: the pressurizing assembly (1) is an air compressor.
3. The purge drying system for preventing hardening of a titanium concentrate according to claim 1 or 2, characterized in that: the purging structure (11) is at least two rows of blowing holes arranged on the circular arc-shaped side surface of the air inlet main shaft, and the blowing holes in each row are uniformly distributed along the circumferential direction of the air inlet main shaft.
4. The purge drying system for preventing hardening of a titanium concentrate according to claim 1 or 2, characterized in that: the front end surfaces of the purging fins (12) of each group are arranged at an included angle of 15 degrees with the outer surface of the air inlet main shaft (10) along the axial direction.
5. The purge drying system for preventing hardening of a titanium concentrate according to claim 4, wherein: the rear end surfaces of the purging fins (12) of each group are arranged at an included angle of 30 degrees with the outer surface of the air inlet main shaft (10) along the axial direction.
6. The purge drying system for preventing hardening of a titanium concentrate according to claim 5, wherein: the flue gas main pipe (4) of the rotary kiln (3) is axially arranged at the rotation center of the rotary kiln (3), the flue gas return pipe (5) is circumferentially arranged on the rotary kiln wall outside the flue gas main pipe (4), the outlet end of the blanking pipe (7) which is obliquely arranged on the rotary kiln fixing seat is positioned between the flue gas return pipe (5) and the flue gas main pipe (4), the distance between the outlet end and the flue gas main pipe (4) is 1-1.5 m, and the axial center line of the air inlet main shaft (10) which is arranged between the flue gas return pipe (5) and the flue gas main pipe (4) is coplanar with the axial center line of the blanking pipe (7) in the vertical direction.
7. A process for the blow drying of titanium concentrate using the blow drying system of claim 6, characterized by: according to the process method, titanium concentrate is input into the rotary kiln (3) through the blanking pipe (7), meanwhile, pressure gas with the pressure value of 4000 Pa-5000 Pa is blown out through the blower (8) of the blower mechanism (2), the titanium concentrate entering the rotary kiln (3) is in a suspended dispersion state, and the titanium concentrate in the rotary kiln (3) is separated from the flue gas main pipe (4) and the side wall of the rotary kiln (3) to prevent the titanium concentrate from hardening so as to dry the titanium concentrate.
CN202111134616.4A 2021-09-27 2021-09-27 Purging and drying system for preventing titanium concentrate from hardening and process method thereof Active CN113847789B (en)

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