CN212610746U - Material accelerator for mineral powder conveying pipeline in smelting reduction process - Google Patents
Material accelerator for mineral powder conveying pipeline in smelting reduction process Download PDFInfo
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- CN212610746U CN212610746U CN202021013816.5U CN202021013816U CN212610746U CN 212610746 U CN212610746 U CN 212610746U CN 202021013816 U CN202021013816 U CN 202021013816U CN 212610746 U CN212610746 U CN 212610746U
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- 239000000463 material Substances 0.000 title claims abstract description 58
- 239000000843 powder Substances 0.000 title claims abstract description 57
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 53
- 239000011707 mineral Substances 0.000 title claims abstract description 53
- 238000003723 Smelting Methods 0.000 title claims abstract description 37
- 238000011946 reduction process Methods 0.000 title claims abstract description 23
- 238000007664 blowing Methods 0.000 claims abstract description 40
- 239000007921 spray Substances 0.000 claims abstract description 12
- 239000000872 buffer Substances 0.000 claims description 24
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 7
- 239000010962 carbon steel Substances 0.000 claims description 7
- 229910052593 corundum Inorganic materials 0.000 claims description 7
- 239000010431 corundum Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000001133 acceleration Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229940098458 powder spray Drugs 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model relates to a material accelerator for a mineral powder conveying pipeline in a smelting reduction process, which belongs to the technical field of smelting reduction process equipment. This melting reduction technology is material accelerator for powdered ore pipeline, and the material accelerator sets up between hot ore conveying pipeline and spray gun pipeline, and the material accelerator includes: the connecting piece comprises a blowing section and a turning section which are communicated, and one end of the blowing section is communicated with the hot ore conveying pipeline; the accelerating part comprises a first shell and a conical pipeline arranged in the first shell, the conical pipeline comprises a first end communicated with the turning section and a second end communicated with the spray gun pipeline, and the diameter of the first end is larger than that of the second end. This material accelerator is through setting up the taper pipe in accelerating the piece, and the diameter of the first end of taper pipe and the diameter reasonable in design of second end guarantee that the wearing and tearing of material to the pipeline are less under the condition that improves acceleration effect to reduction in production cost, powdered ore can effectively be accelerated after the material accelerator.
Description
Technical Field
The utility model relates to a smelting reduction process equipment technical field, concretely relates to material accelerator for smelting reduction process powdered ore conveying pipeline.
Background
The HIsmelt is used as the only iron making technology which gets rid of coking and sintering processes in the existing iron making field, directly uses powdery iron-containing materials and non-coking coal powder for smelting, is the only metallurgical technology which does not use coke, sintering and pelletizing processes completely in the world, has obvious technological advantages, revolutionary technical significance and industrial application prospects in the aspects of energy conservation, environmental protection, resource utilization, energy source expansion, product remodeling, process innovation and the like in the metallurgical industry, is one of the most important high and new technologies in the metallurgical industry at present, has important industrial influence in the world, and belongs to the metallurgy leading-edge technology.
The smelting reduction furnace is a core reaction furnace in the HIsmelt technology, materials are important raw materials for reaction in the smelting reaction furnace, wherein mineral powder conveying is completed through a mineral powder injection system, and the mineral powder conveying approximately comprises the following steps: mineral powder is conveyed to a drying kiln and a rotary kiln from a raw material warehouse through conveying belts at all levels, is preheated and pre-reduced in the rotary kiln, is transferred to a hot ore bin for temporary storage, is transferred to a blowing system, and is sprayed into a smelting furnace through a spray gun at the tail end of the blowing system. Because the temperature in the smelting reduction furnace is maintained above 1400 ℃ and the pressure is above 60kpa, the mineral powder can quickly finish reaction within several seconds after entering the furnace, and the mineral powder has stronger penetrating power on a reaction molten pool in the smelting reduction furnace only on the basis of obtaining enough speed and kinetic energy, and can be uniformly distributed after being sprayed into the molten pool, so that the stirring effect on the molten pool is achieved, the atmosphere of the molten pool is activated, and efficient material transmission and energy transmission are performed in the molten pool.
In the prior art, in order to make the mineral powder obtain corresponding kinetic energy, the conveying amount of nitrogen needs to be increased, so that a large amount of capital needs to be invested to improve the capacity of an oxygen generation station, and the production cost is increased. However, if the ore fines are not accelerated before entering the lance, the ore fines may have insufficient flow velocity and kinetic energy, which may cause the following hazards to the smelting reduction furnace: when the movement of the mineral powder is blocked, the mineral powder spray gun is easy to block, and when the movement is serious, the mineral powder spray gun needs to be stopped for maintenance, so that the production cost is greatly increased; the mineral powder has insufficient penetrating power after being sprayed into the molten pool, so that the mineral powder is easily distributed unevenly in the molten pool; the stirring effect of the mineral powder on the molten pool is insufficient, the atmosphere of the molten pool is inactive, the efficiency of material transmission and energy transfer in the molten pool is low, and the smelting process cannot be smoothly carried out; and the abrasion of the mineral powder spray gun is accelerated, and the service life of the mineral powder spray gun is shortened. Therefore, how to obtain enough conveying speed of the ore powder and reduce the production cost is the key point of the design.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve above-mentioned technical problem, provide a material accelerator for smelting reduction technology powdered ore conveying line, this material accelerator comprises relatively independent subassembly in whole jetting system, thereby can make the powdered ore obtain sufficient kinetic energy with higher speed, ensures that the reaction is high-efficiently gone on in the smelting reduction furnace, avoids blockking up the spray gun, can also be convenient for change when the material accelerator damages, has reduced manufacturing cost effectively.
The utility model discloses a realize through following technical scheme:
a material accelerator for a mineral powder conveying pipeline in a smelting reduction process, wherein the material accelerator is arranged between a hot ore conveying pipeline and a spray gun pipeline, and comprises:
the connecting piece comprises a blowing section and a turning section which are communicated, and one end of the blowing section is communicated with the hot ore conveying pipeline;
an accelerator member including a first housing and a tapered conduit disposed within the first housing, the tapered conduit including a first end in communication with the diverter segment and a second end in communication with the lance conduit, the first end having a diameter greater than a diameter of the second end.
Preferably, a sealing rubber mat is arranged at the joint of the material accelerator, the hot ore conveying pipeline and the spray gun pipeline.
Preferably, two ends of the accelerating part are respectively connected with the spray gun pipeline and the steering section through flanges.
Preferably, both ends of the accelerating part are provided with connecting flanges.
Preferably, the connecting piece further comprises a buffer section, and one end of the buffer section is communicated with the joint of the blowing section and the turning section.
Preferably, an acute included angle between the blowing section and the turning section is 45 degrees, and the axis of the buffer section is coincided with the axis of the blowing section.
Preferably, the first housing of the acceleration member is provided with at least one suspension ring.
Preferably, two lifting rings are arranged on the first shell of the accelerating part.
Preferably, a first refractory is filled between the first shell of the accelerator member and the tapered pipe.
Preferably, the first refractory part is formed by pouring corundum, and the conical pipeline is made of carbon steel.
Preferably, the first refractory material has a weight of not more than 30 kg.
Preferably, the diameter of the first end is 160-230mm, the diameter of the second end is 140-190mm, and the length of the tapered pipe is 500-900 mm.
Preferably, the blowing section, the turning section and the buffer section respectively comprise a second outer shell, an inner pipeline and a second refractory material filled between the second outer shell and the inner pipeline, and the diameter of the inner pipeline of the blowing section is larger than that of the inner pipeline of the turning section.
Preferably, the second refractory member is formed by pouring corundum, and the inner pipeline is made of carbon steel.
Preferably, the second refractory piece has a weight of not more than 80 kg.
Preferably, the length of the blowing section is 1000-1500mm, and the diameter of the inner pipeline of the blowing section is 180-260 mm; the length of the turning section is 600-1200mm, and the diameter of the inner pipeline of the turning section is 160-230 mm; the length of the buffer section is 400-800mm, and the diameter of the inner pipeline of the buffer section is 150-230 mm.
The utility model has the advantages that:
1. according to the material accelerator for the mineral powder conveying pipeline in the smelting reduction process, mineral powder can be effectively accelerated after passing through the material accelerator, so that the efficient reaction in a smelting reduction furnace is facilitated, and the blockage of a spray gun is effectively avoided; through set up the tapered pipeline in accelerating component, the diameter of the first end of tapered pipeline and the diameter reasonable in design of second end guarantee that the material is less to the wearing and tearing of pipeline under the condition of effect is accelerated in the improvement to reduction in production cost.
2. According to the material accelerator for the mineral powder conveying pipeline in the smelting reduction process, the buffer section is arranged in the connecting piece, the inner space of the buffer section can play a good buffer role on mineral powder rising from the injection section, the mineral powder is prevented from directly impacting the upper wall of the inner pipeline of the steering section in the steering process of entering the steering section from the injection section, the service life of the joint piece is prolonged, and the production cost is reduced.
3. According to the material accelerator for the mineral powder conveying pipeline in the smelting reduction process, the lifting ring is arranged on the first shell of the accelerating part, so that the accelerating part can be conveniently mounted and dismounted.
4. According to the material accelerator for the mineral powder conveying pipeline in the smelting reduction process, the conical pipeline of the accelerating part and the inner pipeline of the connecting part are made of carbon steel, so that the material accelerator is high-temperature resistant and friction resistant, the service life of the material accelerator is prolonged, and the production cost is reduced.
5. According to the material accelerator for the mineral powder conveying pipeline in the smelting reduction process, the first refractory part and the second refractory part are formed by pouring corundum, so that the material accelerator not only can play a good heat preservation role on mineral powder, but also is light in weight, convenient to install and disassemble, beneficial to reducing the mechanical load of the material accelerator on a blowing pipeline system, and capable of avoiding deformation of the blowing pipeline due to overlarge stress under a high-temperature condition.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the accelerator member of FIG. 1;
fig. 3 is a schematic structural view of a section a-a in fig. 2.
In the figure, 1, a hot ore conveying pipeline; 2. a lance conduit; 3. a connecting member; 31. a blowing section; 32. a turning section; 33. a buffer section; 4. an accelerator member; 41. a first housing; 42. a tapered conduit; 43. a first end; 44. a second end; 45. a first resistant piece; 46. lifting lugs; 47. and connecting the flanges.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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.
When the mineral powder is sprayed into the smelting reduction furnace, the mineral powder can only obtain enough speed and kinetic energy and has stronger penetrating power to a reaction molten pool in the smelting reduction furnace, and the mineral powder can be uniformly distributed in the reaction molten pool after being sprayed into the molten pool to stir the molten pool, so that the molten pool atmosphere is activated, and under the condition of efficient material transmission and energy transmission in the molten pool, the prior art generally increases the requirement on the nitrogen conveying amount in order to ensure that the mineral powder obtains corresponding kinetic energy, so a large amount of funds are required to be invested to improve the capacity of an oxygen generation station, and the production cost is increased. Therefore, how to obtain enough conveying speed of the ore powder and reduce the production cost is the key point of the design.
Referring to fig. 1, 2 and 3, the utility model provides a material accelerator for smelting reduction technology powdered ore conveying line sets up the material accelerator between hot ore conveying pipeline 1 and spray gun pipeline 2 to set up sealed cushion at the junction of material accelerator and hot ore conveying pipeline 1 and at the junction of material accelerator and spray gun pipeline 2, the gas tightness of the sealed cushion who adopts is good and high temperature resistant. The material accelerator includes connecting piece 3 and acceleration piece 4, and connecting piece 3 includes jetting section 31 and turns to section 32, and the one end of jetting section 31 is linked together with hot ore deposit pipeline 1's one end, and the other end of jetting section 31 is linked together with the one end that turns to section 32, turns to the other end of section 32 and is linked together with acceleration piece 4, and jetting section 31 and hot ore deposit pipeline 1 coaxial line set up, turns to section 32, acceleration piece 4 and spray gun pipeline 2 coaxial line set up. The accelerator 4 comprises a first housing 41 and a tapered conduit 42 disposed within the first housing 41, the tapered conduit 42 comprising a first end 43 and a second end 44, the first end 43 communicating with the turnaround section 32 and the second end 44 communicating with the lance conduit 2, the first end 43 having a larger diameter than the second end 44.
The blowing section 31 and the hot ore conveying pipeline 1 are both vertically arranged, the turning section 32 is obliquely arranged, an acute included angle between the turning section 32 and the blowing section 31 is 45 degrees, because mineral powder enters the blowing section 31 from the hot ore conveying pipeline 1 and then enters the turning process of the turning section 32, the tube wall of the turning section 32 can be directly impacted, in order to buffer the impact force of the mineral powder on the turning section 32, the service life of the connecting piece 3 is prolonged, a buffer section 33 is arranged above the blowing section 31, the buffer section 33 is vertically arranged, the axis of the buffer section 33 is overlapped with the axis of the blowing section 31, one end of the buffer section 33 far away from the blowing section 31 is closed, one end of the buffer section 33 close to the blowing section 31 is communicated with the blowing section 31 and is also communicated with the turning section 32. The blowing section 31, the turning section 32 and the buffer section 33 are integrally formed. Because the accelerating part 4 and the connecting part 3 of the material accelerator are independent components, the accelerating part 4 or the connecting part 3 is convenient to replace when damaged.
Because the temperature of the mineral powder when the mineral powder passes through the material accelerator is between 350 and 800 ℃, and the impact friction of the accelerated mineral powder to the material accelerator is large, in order to prolong the service life of the material accelerator, a first refractory member 45 is filled between a first shell 41 and a conical pipeline 42 of the accelerator, a blowing section 31, a turning section 32 and a buffer section 33 are arranged into structures comprising a second shell and an inner pipeline, a second refractory member is filled between the second shell and the inner pipeline, the conical pipeline 42 and the inner pipeline are made of carbon steel, the carbon steel alloy has high hardness and high strength, so that the wear resistance and erosion resistance effects of the conical pipeline 42 and the inner pipeline are improved, the first refractory member 45 and the second refractory member are both formed by corundum, the thermal conductivity of the corundum is small, the good heat preservation effect on the mineral powder in the material accelerator is facilitated, the weight of the first refractory member 45 is not more than 30kg, the weight of the second refractory piece is not more than 80kg, so that the densities of the accelerating piece 4 and the connecting piece 3 are smaller, the whole mass of the material accelerator is reduced, the mechanical load of the material accelerator on a blowing pipeline system can be effectively reduced, the blowing pipeline is effectively prevented from being deformed due to overlarge stress under the high-temperature condition, and the material accelerator is convenient to install and detach.
In order to facilitate the mounting and dismounting of the acceleration member 4, two suspension rings 46 are provided on the first housing 41 of the acceleration member 4, and attachment flanges 47 are provided at both ends of the acceleration member 4.
In order to make the whole material accelerator well accelerate the mineral powder, the diameter of the first end 43 of the accelerating part 4 is set to be 230mm, the diameter of the second end 44 is set to be 190mm, and the length of the conical pipeline 42 is set to be 900 mm; the length of the blowing section 31 is set to be 1000-1500mm, and the diameter of the inner pipeline of the blowing section 31 is set to be 180-2600 mm; the length of the turning section 32 is set to 600-1200mm, and the diameter of the inner pipeline of the turning section 32 is set to 160-230 mm; the length of the buffer section 33 is set to 400-800mm, and the inner pipe diameter of the buffer section 33 is set to 150-230 mm. The mineral powder moving at high speed has an erosion effect on the inner wall of the conical pipeline 42 of the accelerating element 4, and the erosion effect is weaker due to the small taper of the conical pipeline 42, so that the service life of the conical pipeline 42 is effectively prolonged.
The acceleration principle and the process of the mineral powder by the material accelerator for the mineral powder conveying pipeline in the smelting reduction process are as follows:
mineral powder enters from the blowing section and is discharged from the turning section through the buffering action of the buffering section. Under the condition of 65t/h ore spraying amount, the speed of the ore powder entering the spraying section of the connecting piece from the ore powder conveying pipeline is about 36m/s, the diameter of the inner pipeline of the spraying section is 180-260mm, the diameter of the inner pipeline of the turning section is 160-230mm, and according to the formula f ═ rho. v.s (f is the ore spraying amount, rho is the ore powder density, and s is the pipeline sectional area), the speed of the accelerated ore powder is about 48m/s when the ore powder enters the turning section from the spraying section; the diameter of the first end (namely the inlet diameter) of the conical pipeline of the accelerating part is 160- & ltSUB & gt 230mm, the diameter of the second end (namely the outlet diameter) of the conical pipeline is 140- & ltSUB & gt 190mm, the length of the conical pipeline is 500- & ltSUB & gt 900mm, and the speed of the mineral powder after being accelerated by the accelerating part is about 56 m/s.
The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A material accelerator for a mineral powder conveying pipeline in a smelting reduction process is characterized in that the material accelerator is arranged between a hot ore conveying pipeline and a spray gun pipeline, and comprises:
the connecting piece comprises a blowing section and a turning section which are communicated, and one end of the blowing section is communicated with the hot ore conveying pipeline;
an accelerator member including a first housing and a tapered conduit disposed within the first housing, the tapered conduit including a first end in communication with the diverter segment and a second end in communication with the lance conduit, the first end having a diameter greater than a diameter of the second end.
2. The material accelerator for the mineral powder conveying pipeline in the smelting reduction process according to claim 1, wherein the connecting piece further comprises a buffer section, and one end of the buffer section is communicated with the joint of the blowing section and the turning section.
3. The material accelerator for the mineral powder conveying pipeline in the smelting reduction process according to claim 2, wherein an acute included angle between the blowing section and the turning section is 30-50 degrees, and an axis of the buffer section is coincident with an axis of the blowing section.
4. The material accelerator for the mineral powder conveying pipeline in the smelting reduction process according to claim 1, wherein the first shell of the accelerator is provided with at least one lifting ring.
5. The material accelerator for the mineral powder conveying pipeline in the smelting reduction process according to claim 1, wherein a first refractory is filled between the first outer shell of the accelerating member and the conical pipe.
6. The material accelerator for the mineral powder conveying pipeline in the smelting reduction process according to claim 5, wherein the first refractory member is cast by corundum, and the conical pipe is made of carbon steel.
7. The material accelerator for the mineral powder conveying pipeline in the smelting reduction process as claimed in claim 1, wherein the diameter of the first end is 230mm, the diameter of the second end is 190mm, and the length of the tapered pipe is 900 mm.
8. The material accelerator for the fine ore conveying pipeline in the smelting reduction process according to claim 2, wherein the blowing section, the turning section and the buffering section each comprise a second outer shell, an inner pipe and a second refractory member filled between the second outer shell and the inner pipe, and the diameter of the inner pipe of the blowing section is larger than that of the inner pipe of the turning section.
9. The material accelerator for the mineral powder conveying pipeline in the smelting reduction process according to claim 8, wherein the second refractory member is formed by pouring corundum, and the inner pipeline is made of carbon steel.
10. The material accelerator for the mineral powder conveying pipeline in the smelting reduction process according to claim 8, wherein the length of the blowing section is 1000-1500mm, and the diameter of the inner pipeline of the blowing section is 180-260 mm; the length of the turning section is 600-1200mm, and the diameter of the inner pipeline of the turning section is 160-230 mm; the length of the buffer section is 400-800mm, and the diameter of the inner pipeline of the buffer section is 150-230 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021013816.5U CN212610746U (en) | 2020-06-05 | 2020-06-05 | Material accelerator for mineral powder conveying pipeline in smelting reduction process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021013816.5U CN212610746U (en) | 2020-06-05 | 2020-06-05 | Material accelerator for mineral powder conveying pipeline in smelting reduction process |
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| Publication Number | Publication Date |
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| CN212610746U true CN212610746U (en) | 2021-02-26 |
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| CN202021013816.5U Active CN212610746U (en) | 2020-06-05 | 2020-06-05 | Material accelerator for mineral powder conveying pipeline in smelting reduction process |
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Effective date of registration: 20240730 Address after: 262700 Southwest corner of the intersection of Shenghai East Road and Xingang Road, Yangkou Town, Shouguang City, Weifang City, Shandong Province Patentee after: Shouguang Maolong New Material Technology Development Co.,Ltd. Country or region after: China Address before: No.999 Wensheng street, Shouguang City, Weifang City, Shandong Province Patentee before: SHANDONG MOLONG PETROLEUM MACHINERY Co.,Ltd. Country or region before: China |
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