CN210176888U - Indirect heating hydrogen rotary kiln direct reduction high-purity iron system - Google Patents
Indirect heating hydrogen rotary kiln direct reduction high-purity iron system Download PDFInfo
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- CN210176888U CN210176888U CN201921115932.5U CN201921115932U CN210176888U CN 210176888 U CN210176888 U CN 210176888U CN 201921115932 U CN201921115932 U CN 201921115932U CN 210176888 U CN210176888 U CN 210176888U
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Abstract
The utility model discloses an indirect heating hydrogen rotary kiln direct reduction high-purity iron system, including the cylinder pelletizer, the upper end of cylinder pelletizer is provided with the feed bin, and the discharge end of cylinder pelletizer is connected with the guipure drying-machine, and the discharge end of guipure drying-machine is connected with the feed end of indirect heating rotary kiln, and the indirect heating rotary kiln is connected with purification recoverer, medicament charge door and gas dust remover. The gas heating and the reduction in the indirect heating rotary kiln through setting up are two passageways, and the reduction process is gone on under the flame-proof hydrogen atmosphere completely, and the reduction passageway adopts heat-resisting stainless steel cylinder, and the barrel is longe-lived, can not produce reducing gas and spill over, great improvement iron's purity has avoided coal-based tunnel kiln pot-type technology + steel band stove hydrogen fine reduction technology in tunnel kiln technology link canning link, and intensity of labour is big, the energy consumption is big and the problem of polluted environment.
Description
Technical Field
The utility model relates to a powder metallurgy technical field specifically is an indirect heating hydrogen rotary kiln direct reduction high purity iron system.
Background
Although the powder metallurgy industry is a long-standing industry and a new and rapidly-developed industry, compared with large industrial systems, the powder metallurgy industry is a small and popular industry, the system can be spread in all industrial manufacturing fields of aviation, aerospace, nuclear power, high-speed rail, automobiles, household appliances and the like, the powder metallurgy material is an advanced basic new material and a key strategic new material, because of the limitation of natural gas resources in China, the steel industry in China relates to processes of directly reducing iron by using a coal-based direct heating rotary kiln, directly reducing iron by using a coal-based rotary hearth furnace and the like, which are links in the flow of low-purity steel industry, are relatively deficient in the aspect of directly reducing iron by using gas-based high-purity, in particular to the direction of the powder metallurgy field, some process technologies of the steel industry cannot be referred to, and the coal-based tunnel tank-type kiln process and the steel strip furnace hydrogen fine reduction process (commonly called as a hydrocarbon two-step reduction method) with Chinese characteristics, becomes the inherent mode of the powder metallurgy basic material industry in China.
The applicant of the invention finds that the existing coal-based tunnel kiln pot-type process and steel strip furnace hydrogen fine reduction process have the defects of high labor intensity, high energy consumption, environmental pollution, high cost for cutting and crushing semi-finished sponge iron tiles, noise, dust emission, severe environment and high fuel gas consumption in the pot loading link of the tunnel kiln process link.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an indirect heating hydrogen rotary kiln direct reduction high purity iron system aims at improving the problem that current coal-based tunnel kiln pot-type technology + steel band stove hydrogen fine reduction technology intensity of labour is big, the energy consumption is big and the polluted environment.
The utility model discloses a realize like this:
an indirect heating hydrogen rotary kiln direct reduction high-purity iron system comprises a rotary drum pelletizer, a storage bin is arranged at the upper end of the rotary drum pelletizer, a mesh belt dryer is connected to the discharge end of the rotary drum pelletizer, the discharge end of the mesh belt dryer is connected with the feed end of the indirect heating rotary kiln, the indirect heating rotary kiln is connected with a purification recoverer, a medicament feed inlet and a gas dust remover, a rotary cooler is connected to the discharge end of the indirect heating rotary kiln, a transport belt is connected to the discharge end of the rotary cooler, the ultra-pure iron fine powder is pelletized through the arranged rotary drum pelletizer, the manufactured ultra-pure iron fine powder can avoid generating semi-finished sponge iron tiles after reduction processing, subsequent crushing processing of the semi-finished sponge iron tiles is not needed, the crushing cost is reduced, the environmental pollution caused by noise and dust emission is avoided, meanwhile, the gas heating and reduction in the rotary kiln through the arranged indirect heating are two channels, the reduction process is completely carried out in the flame-proof hydrogen atmosphere, the reduction channel adopts a heat-resistant stainless steel roller, the service life of the roller body is long, the overflow of reducing gas can not be generated, the purity of iron is greatly improved, and the problems of high labor intensity, high energy consumption and environmental pollution caused by the canning link of the coal-based tunnel kiln pot-type process and the steel strip furnace hydrogen fine reduction process in the tunnel kiln process link are solved.
Further, the inboard of indirect heating rotary kiln is provided with the stainless steel cylinder, and the below that is located the stainless steel cylinder is provided with the combustor, and the stainless steel cylinder is connected with the hydrogen filling opening, realizes heating the stainless steel cylinder through the combustor to inject hydrogen to the stainless steel cylinder through the hydrogen filling opening and realize the spheroidal hydrogen reduction of super pure fine iron powder.
Furthermore, the lower extreme of indirect heating rotary kiln is provided with the regulation landing leg that can carry out altitude mixture control, can realize carrying out inclination to indirect heating rotary kiln and adjust.
Furthermore, the rotary cooler is connected with a nitrogen storage tank through a pipeline, nitrogen is injected into the rotary cooler through a nitrogen storage tank to avoid oxidation during the temperature reduction of the reduced iron, and the purity of the reduced iron is ensured.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses in carry out the pelletization processing to super pure iron fine powder through the cylinder pelletizer that sets up, it can avoid generating semi-manufactured goods sponge iron tile after reduction process to make into spheroidal super pure iron fine powder, need not subsequent semi-manufactured goods sponge iron tile and carry out broken processing, reduce broken cost, avoid producing noise and raise dust and cause environmental pollution, gas heating and reduction in the indirect heating rotary kiln through setting up are two passageways simultaneously, the reduction process is gone on under the flame-proof hydrogen atmosphere completely, the reduction passageway adopts heat-resisting stainless steel cylinder, the barrel is longe-lived, can not produce reducing gas and spills over, great improvement iron's purity, avoided coal-based tunnel kiln technology + steel band stove hydrogen fine reduction technology at tunnel kiln technology link canning link, high labor strength, the energy consumption is big and the problem of polluted environment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a process structure diagram of a method for directly reducing high-purity iron by an indirect heating hydrogen rotary kiln of the utility model.
In the figure: 1. a roller pelletizer; 101. a storage bin; 2. a mesh belt dryer; 3. purifying and recovering the water; 4. a medicament feed port; 5. a gas dust remover; 6. indirectly heating the rotary kiln; 61. a burner; 62. a stainless steel roller; 63. adjusting the support legs; 64. a hydrogen gas injection port; 7. a rotary cooler; 8. a conveyor belt.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Embodiment 1, please refer to fig. 1 specifically, a system for directly reducing high-purity iron in an indirect heating hydrogen rotary kiln includes a roller pelletizer 1, a bin 101 is disposed at an upper end of the roller pelletizer 1, a mesh belt dryer 2 is connected to a discharge end of the roller pelletizer 1, the discharge end of the mesh belt dryer 2 is connected to a feed end of the indirect heating rotary kiln 6, a stainless steel roller 62 is disposed inside the indirect heating rotary kiln 6, a burner 61 is disposed below the stainless steel roller 62, the stainless steel roller 62 is connected to a hydrogen inlet 64, the stainless steel roller 62 is heated by the burner 61, hydrogen is injected into the stainless steel roller 62 through the hydrogen inlet 64 to reduce the ultra-pure iron fine powder spheres, a height-adjustable adjusting leg 63 is disposed at a lower end of the indirect heating rotary kiln 6 to adjust an inclination angle of the indirect heating rotary kiln 6, the indirect heating rotary kiln 6 is connected with a purifying and recovering device 3, a medicament charging port 4 and a gas dust remover 5, the discharging end of the indirect heating rotary kiln 6 is connected with a rotary cooler 7, the rotary cooler 7 is connected with a nitrogen storage tank through a pipeline, nitrogen is injected into the rotary cooler 7 through a nitrogen storage tank to avoid oxidation when the reduced iron is cooled, the purity of the reduced iron is ensured, the discharging end of the rotary cooler 7 is connected with a conveying belt 8, the ultra-pure iron fine powder is pelletized through a set roller pelletizer 1, the ultra-pure iron fine powder manufactured into a sphere can avoid generating a semi-finished product sponge iron tile after reduction processing, the subsequent crushing processing of the semi-finished product sponge iron tile is not needed, the crushing cost is reduced, the environmental pollution caused by noise and dust is avoided, and meanwhile, the gas heating and the reduction in the indirect heating rotary kiln 6 are two channels, the reduction process is completely carried out in the flame-proof hydrogen atmosphere, the reduction channel adopts the heat-resistant stainless steel roller 62, the service life of the roller body is long, the overflow of reducing gas can not be generated, the purity of iron is greatly improved, and the problems of large labor intensity, large energy consumption and environmental pollution caused by the canning link of the coal-based tunnel kiln pot-type process and the steel strip furnace hydrogen fine reduction process in the tunnel kiln process link are solved.
The working principle is as follows: the ultra-pure iron fine powder in the storage bin 101 is pelletized by a roller pelletizer 1, ultra-pure iron fine powder spheres generated after pelletizing processing enter a mesh belt dryer 2 for drying, the dried ultra-pure iron fine powder spheres enter a stainless steel roller 62 in an indirect heating rotary kiln 6, a reducing agent and a desulfurizing agent are added into the stainless steel roller 62 through the agent charging port 4, the constantly rotating stainless steel roller 62 is heated through the burner 61, and heated to 1048 ℃ -1052 ℃ to realize fixed carbon reduction and hydrocarbon reduction, then the heating temperature is linearly reduced to 748-752 ℃ by controlling the heating of the burner 61, then hydrogen is injected through the hydrogen injection port 64 to realize hydrogen reduction, the reduced pure iron spheres enter the rotary cooler 7 to be cooled in a rotary manner, and the anti-oxidation protection is realized when the pure iron sphere is cooled by injecting nitrogen into the rotary cooler 7.
The device obtained by the design can basically meet the requirements of the existing fine iron powder and pure iron reduction process on low labor intensity, low energy consumption and environmental pollution prevention, but the designer further improves the device with the aim of further improving the functions.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides an indirect heating hydrogen rotary kiln direct reduction high purity iron system, includes cylinder pelletizer (1), its characterized in that: the upper end of cylinder pelletizer (1) is provided with feed bin (101), and the discharge end of cylinder pelletizer (1) is connected with guipure drying-machine (2), the discharge end of guipure drying-machine (2) is connected with the feed end of indirect heating rotary kiln (6), and indirect heating rotary kiln (6) is connected with purification recoverer (3), medicament charge door (4) and gas dust remover (5), the discharge end of indirect heating rotary kiln (6) is connected with rotary cooler (7), and the discharge end of rotary cooler (7) is connected with conveyer belt (8).
2. The system for directly reducing high-purity iron in the indirectly heated hydrogen rotary kiln according to claim 1, wherein a stainless steel roller (62) is arranged on the inner side of the indirectly heated rotary kiln (6), a burner (61) is arranged below the stainless steel roller (62), and the stainless steel roller (62) is connected with a hydrogen injection port (64).
3. The system for directly reducing high-purity iron by using the indirectly heated hydrogen rotary kiln as claimed in claim 2, wherein the lower end of the indirectly heated rotary kiln (6) is provided with an adjusting leg (63) capable of adjusting the height.
4. The system for directly reducing high-purity iron in the indirectly heated hydrogen rotary kiln as claimed in claim 3, wherein the rotary cooler (7) is connected with a nitrogen storage tank through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921115932.5U CN210176888U (en) | 2019-07-17 | 2019-07-17 | Indirect heating hydrogen rotary kiln direct reduction high-purity iron system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921115932.5U CN210176888U (en) | 2019-07-17 | 2019-07-17 | Indirect heating hydrogen rotary kiln direct reduction high-purity iron system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210176888U true CN210176888U (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921115932.5U Active CN210176888U (en) | 2019-07-17 | 2019-07-17 | Indirect heating hydrogen rotary kiln direct reduction high-purity iron system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210176888U (en) |
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2019
- 2019-07-17 CN CN201921115932.5U patent/CN210176888U/en active Active
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