CN210886084U - Air cooling device applied to dry centrifugal granulation of blast furnace slag - Google Patents
Air cooling device applied to dry centrifugal granulation of blast furnace slag Download PDFInfo
- Publication number
- CN210886084U CN210886084U CN201921642270.7U CN201921642270U CN210886084U CN 210886084 U CN210886084 U CN 210886084U CN 201921642270 U CN201921642270 U CN 201921642270U CN 210886084 U CN210886084 U CN 210886084U
- Authority
- CN
- China
- Prior art keywords
- air
- granulation
- bin
- slag
- granulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002893 slag Substances 0.000 title claims abstract description 72
- 238000005469 granulation Methods 0.000 title claims abstract description 53
- 230000003179 granulation Effects 0.000 title claims abstract description 53
- 238000001816 cooling Methods 0.000 title claims abstract description 39
- 238000009826 distribution Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 abstract description 13
- 210000004127 vitreous body Anatomy 0.000 abstract description 6
- 238000001035 drying Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000007908 dry granulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Details (AREA)
Abstract
The utility model belongs to the technical field of the slag is handled, a device that blast furnace slag dry process is grained is related to. An air cooling device applied to dry centrifugal granulation of blast furnace slag comprises: a granulation bin; the granulating disc is arranged at the middle upper part of the granulating bin; the motor is connected with the granulating disc and drives the granulating disc to rotate; and the air cooling assembly is used for forming an air field in the granulating bin and cooling the granulated slag. The air cooling device applied to the blast furnace slag dry centrifugal granulation of the utility model forms a proper wind field in the granulation bin, on one hand, the high-temperature liquid slag can be fully cooled after granulation to obtain enough vitreous body content; on the other hand, the wall of the granulating bin can be cooled, so that the adhesion between the wall of the granulating bin and the molten slag is prevented, and the service life of the equipment is prolonged.
Description
Technical Field
The utility model belongs to the technical field of the slag is handled, a device that blast furnace slag dry process is grained is related to.
Background
The iron and steel industry is a prop industry of national economy in China, a large amount of blast furnace slag byproducts can be generated from sintered iron ores in the iron making process, according to research, about 0.3-0.4 ton of blast furnace slag is generated every ton of pig iron is generated, the temperature is about 1500 ℃, and the iron and steel industry has the characteristics of large yield and high heat. Meanwhile, the main components of the blast furnace slag are SiO2, CaO, MgO and Al2O3, and the blast furnace slag is a raw material for manufacturing cement.
The traditional blast furnace slag treatment process is a water quenching method, after liquid slag and molten iron are separated, a large amount of tap water is used for carrying out water flushing treatment on the blast furnace slag, the process not only wastes a large amount of water resources, but also causes a large amount of loss of heat resources in the blast furnace slag, and simultaneously generates a large amount of SO2、H2S pollutes gas and brings great influence on environmental management.
After the liquid slag and the molten iron are separated, the liquid slag needs a certain cooling rate after centrifugal granulation through a centrifugal device, so that the content of the vitreous body of the liquid slag reaches more than 92 percent, the maximum doping ratio can be obtained, and the liquid slag and the cement are mutually doped to be used as building materials. Because the dry centrifugal granulation is adopted, the liquid slag can be cooled only by using an air cooling mode, and therefore, the air cooling device capable of effectively cooling slag particles is indispensable.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems in the prior art, the utility model provides an air cooling device for dry granulation of blast furnace slag, which aims to form a suitable wind field in a granulation bin, on one hand, the high-temperature liquid slag can be fully cooled after granulation to obtain enough vitreous body content; on the other hand, the wall of the granulating bin can be cooled, and the service life of the equipment is prolonged.
The utility model provides a technical scheme that its technical problem adopted is: an air cooling device applied to dry centrifugal granulation of blast furnace slag comprises:
a granulation bin;
the granulating disc is arranged at the middle upper part of the granulating bin;
the motor is connected with the granulating disc and drives the granulating disc to rotate;
and the air cooling assembly is used for forming an air field in the granulating bin and cooling the granulated slag.
As a further improvement of the utility model, the air cooling component consists of a fan, a pipeline and an air distribution pipe, the fan is connected with the air distribution pipe through the pipeline, and the air distribution pipe is arranged at the bottom of the granulation cabin; the air distribution pipe is provided with a plurality of air inlets; the air inlet faces the wall of the granulating bin.
As a further improvement of the utility model, the air distribution pipe is a circular ring-shaped pipeline and is arranged along the bottom of the granulating bin for a circle.
As a further improvement of the utility model, the upper part of the granulating bin is provided with a top cover, and the top cover is provided with an air outlet.
As a further improvement of the utility model, the wind speed adjusting and controlling component is also covered; the wind speed adjusting and controlling assembly comprises a temperature sensor, a frequency converter and a PLC, wherein the frequency converter is connected with the fan, and the temperature sensor and the frequency converter are connected with the PLC.
As a further improvement of the utility model, the air cooling device of the utility model also comprises a crucible, and the middle part of the crucible is provided with a slag outflow port; the slag outflow is opposite the granulation disk.
As a further improvement of the utility model, the upper section of the slag outflow port is funnel-shaped; the slag outflow port is provided with a stopper rod, the lower section of the stopper rod is conical, and the stopper rod is matched with the conical surface of the slag outflow port.
The air cooling device applied to the blast furnace slag dry centrifugal granulation of the utility model forms a proper wind field in the granulation bin, on one hand, the high-temperature liquid slag can be fully cooled after granulation to obtain enough vitreous body content; on the other hand, the wall of the granulating bin can be cooled, so that the adhesion between the wall of the granulating bin and the molten slag is prevented, and the service life of the equipment is prolonged.
The utility model discloses a be applied to blast furnace slag dry process centrifugation granulating air cooling plant compares with prior art, and beneficial effect is:
1. effectively cooling the high-temperature particles in flight to reach the content of glass bodies of more than 95 percent;
2. through the design and simulation of the structure of the air inlet and the air outlet, a specific wind field is formed in the granulation cabin, and a good cooling effect of the whole process of the high-temperature particles in the flying process is realized;
3. the air inlet volume can be adjusted in real time according to the flow change, and the optimal cooling effect is achieved;
4. the cooling device can cool the wall of the granulating bin, prevent the wall of the granulating bin from being bonded when colliding with high-temperature molten slag droplets, protect the wall of the granulating bin and prolong the service life of the granulating bin.
5. The system can operate only by remotely setting parameters without human intervention, on one hand, workers are protected, and on the other hand, errors caused by human operation are reduced.
Drawings
FIG. 1 is a schematic structural connection diagram of an air cooling device applied to dry centrifugal granulation of blast furnace slag according to an embodiment of the present invention;
FIG. 2 is a top view of a granulation chamber;
fig. 3 is an external view of the granulation chamber;
FIG. 4 is a schematic view of an air field formed by 20 air inlets which are arranged on the air distribution pipe and face the wall of the granulating bin;
FIG. 5 is a schematic view of an air field formed by arranging 30 air inlets facing the wall of the granulating bin on an air distribution pipe;
FIG. 6 is a schematic view of an air field formed by 20 vertical air inlets arranged on the air distribution pipe;
fig. 7 is a schematic view of an air field formed by arranging 30 vertical air inlets on an air distribution pipe.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Embodiment 1 this example provides an air cooling device for blast furnace slag dry centrifugal granulation, as shown in fig. 1, which mainly comprises a crucible 3, a granulation bin 6, a granulation disc 7, a motor 10, a fan 12, a frequency converter 13, and a PLC 15. The crucible 3 is erected above the granulating bin 6 through a bracket, and the granulating disc 7 is arranged at the middle upper part of the granulating bin 6. The center of the granulating disk 7 is located on the central axis of the granulating bin 6. The granulating disk 7 is connected with a shaft of a motor 10 and is driven by the motor 10 to rotate at a high speed.
As shown in fig. 1, the crucible 3 of the present embodiment is used to heat and store high-temperature liquid slag 2. The high temperature liquid slag 2 flows down to the granulating pan 7 through a slag outflow opening in the middle of the crucible 3. In order to adjust the flow rate of the slag, a stopper rod 1 is arranged in the slag outlet. The upper section of the slag outflow port is funnel-shaped, the lower section of the stopper rod 1 is conical, the stopper rod 1 is connected with the slag outflow port in a matched mode through the conical surface, the throughput of slag can be controlled by pulling and inserting the stopper rod downwards, and the flow rate of the slag can be adjusted.
As shown in fig. 1, in this embodiment, the upper part of the granulating bin 6 is cylindrical, the lower part is conical, a top cover 18 is arranged at the top of the granulating bin 6, and an air outlet 4 is arranged in the middle of the top cover 18. The outlet 4 is opposite to the slag outlet of the crucible 3, and the high-temperature liquid slag falls onto the granulating disc 7 through the outlet 4.
As shown in figure 2, a circle of air distribution pipes 9 are arranged at the bottom of the granulating bin 6. The air distribution pipe 9 is provided with a plurality of air inlets 19, and the air inlets 19 face the inner wall of the granulating bin 6. The air distribution pipe 9 is connected with a fan 12 through an air inlet pipeline 11. The fan 12 is connected to a frequency converter 13, which frequency converter 13 is further connected to a PLC 15. The PLC15 is connected to the PC14, and the PC14 is used to receive, control and monitor data from the PLC15 and the control cabinet 16. The control cabinet 16 distributes power to the entire apparatus.
As shown in fig. 1, a temperature sensor 8 is installed at the upper part of the granulating silo 6, and the temperature sensor 8 is connected with a PLC 15. The measured temperature data in the granulation bin 6 is transmitted to the PLC15, the PLC15 adjusts the rotating speed of the fan 12 in real time through the frequency converter 13 according to the temperature in the granulation bin, and controls the air intake in the granulation bin, so that the temperature in the granulation bin is matched with the rotating speed of the fan, and the temperature change of the granulation bin caused by the change of the molten slag flow is adapted.
The working principle of the air cooling device applied to the dry centrifugal granulation of the blast furnace slag in the embodiment is described as follows: when the system is in operation, high-temperature liquid slag 2 flows onto a granulating disc 7 rotating at a high speed from a crucible 3 under the control of a stopper rod 1, is centrifugally granulated into slag droplets 5 under the action of centrifugal force and surface tension, at the moment, cooling air generated by a fan 12 enters an air distribution pipe 9 in a granulating bin from an air inlet pipe 11, enters the granulating bin from an air inlet 19 along the inner wall of the granulating bin 6, and then leaves the granulating bin through an air outlet 4 to form a specific air field, as shown in fig. 4 or 5, the slag droplets 5 obtain the optimal cooling effect in flight, and vitreous bodies with the content of more than 95% are obtained and can be used as raw materials of cement.
The temperature sensor 8, the frequency converter 12 and the PLC15 form a set of PID self-adaptive air speed adjusting system based on temperature, the temperature sensor 8 is used for detecting the temperature in the granulation cabin, the obtained data is transmitted to the PLC15 in real time, the frequency converter 13 is controlled according to a program written in the PLC, the rotating speed of the fan 12 is further controlled, the temperature in the granulation cabin is matched with the rotating speed of the fan, and the temperature in the granulation cabin is adaptive to the temperature rise of the granulation cabin caused by flow change.
Wherein, the program compiled in the PLC adopts a discrete PID control algorithm formula to control the air intake in real time;
kp,ki,kdthree regulating coefficients are respectively, the error is calculated by the difference value between the air outlet temperature measured by the temperature sensor and the temperature value set in the PLC, and the difference value is substituted into the formula to regulate the corresponding air inlet quantity so as to achieve the purpose of adaptively controlling the air quantity.
It has been found through experiments that a large number of slag particles slide down along the wall of the granulation chamber or close to the wall surface after hitting the wall. Numerical simulation is carried out on the direction of the air inlets and the number of the air inlets through Fluent software, and fig. 6 and 7 show that when the direction of the air inlets is vertical upwards, the wind fields in the granulation bins corresponding to 20 air inlets and 30 air inlets are respectively, and the direction of the wind field in the granulation bins is almost unchanged and the change of the wind speed is not large as can be seen from a vector diagram of the wind speed. The cooling air mainly flows from the lower part of the granulating bin to the middle air outlet along the granulating disc, and the wind speed near the wall of the granulating bin is very low. FIGS. 4 and 5 mainly simulate the influence of the change of the number of air inlets on the wind field in the granulation chamber when the direction of the air inlets is along the wall of the granulation chamber; it can be seen that the variation in the number of air inlets does not have a major effect on the overall wind field in the granulation chamber, and that the overall wind speed in the granulation chamber is increased when the air inlets are increased.
The utility model discloses a device, in order to reach the cooling effect of ideal, the storehouse inner wall is pelletized to the 19 orientation of air intake of design to, because pelletize the storehouse lower part and be conical structure, make the storehouse wall of pelletization have certain inclined plane, reduce the contained angle on air intake and storehouse wall inclined plane (when the air intake is parallel with storehouse wall inclined plane, the effect is best), can make the wind direction of more amount of wind upwards along the storehouse wall of pelletization, form specific wind field. And the more the number of the air inlets, the larger the overall wind speed, as shown in fig. 4 and 5. The structure can fully cool granulated slag particles in the process of impacting the wall of the granulating bin and falling to obtain higher vitreous body content, can accelerate convection heat exchange of the inner wall of the granulating bin, protects the wall of the granulating bin and prolongs the service life of the device.
Claims (7)
1. The air cooling device applied to the dry centrifugal granulation of the blast furnace slag is characterized by comprising the following components:
a granulation bin;
the granulating disc is arranged at the middle upper part of the granulating bin;
the motor is connected with the granulating disc and drives the granulating disc to rotate;
and the air cooling assembly is used for forming an air field in the granulating bin and cooling the granulated slag.
2. The air cooling device applied to the dry centrifugal granulation of the blast furnace slag according to the claim 1, wherein the air cooling component consists of a fan, a pipeline and an air distribution pipe, the fan is connected with the air distribution pipe through the pipeline, and the air distribution pipe is arranged at the bottom of the granulation bin; the air distribution pipe is provided with a plurality of air inlets; the air inlet faces the wall of the granulating bin.
3. The air cooling device applied to the dry centrifugal granulation of the blast furnace slag according to the claim 2, wherein the air distribution pipe is a circular ring-shaped pipeline and is arranged along the circumference of the bottom of the granulation bin.
4. The air cooling device applied to blast furnace slag dry centrifugal granulation according to claim 2, wherein a top cover is arranged at the upper part of the granulation chamber, and an air outlet and a slag inflow port are formed in the top cover.
5. The air cooling device applied to the dry centrifugal granulation of the blast furnace slag according to the claim 1, is characterized by further comprising an air speed adjusting and controlling component; the wind speed adjusting and controlling assembly comprises a temperature sensor, a frequency converter and a PLC, wherein the frequency converter is connected with the fan, and the temperature sensor and the frequency converter are connected with the PLC; the temperature sensor is used for measuring the temperature in the granulating bin.
6. The air cooling device applied to the dry centrifugal granulation of the blast furnace slag according to any one of claims 1 to 5, further comprising a crucible, wherein the middle part of the crucible is provided with a slag outflow port.
7. The air cooling device applied to the dry centrifugal granulation of the blast furnace slag according to the claim 6, wherein the slag outflow port is provided with a stopper rod; the upper section of the slag outflow port is funnel-shaped, the lower section of the stopper rod is conical, and the stopper rod is matched with the conical surface of the upper section of the slag outflow port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921642270.7U CN210886084U (en) | 2019-09-29 | 2019-09-29 | Air cooling device applied to dry centrifugal granulation of blast furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921642270.7U CN210886084U (en) | 2019-09-29 | 2019-09-29 | Air cooling device applied to dry centrifugal granulation of blast furnace slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210886084U true CN210886084U (en) | 2020-06-30 |
Family
ID=71334290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921642270.7U Expired - Fee Related CN210886084U (en) | 2019-09-29 | 2019-09-29 | Air cooling device applied to dry centrifugal granulation of blast furnace slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210886084U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110656211A (en) * | 2019-09-29 | 2020-01-07 | 青岛理工大学 | Air cooling device and method applied to dry centrifugal granulation of blast furnace slag |
-
2019
- 2019-09-29 CN CN201921642270.7U patent/CN210886084U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110656211A (en) * | 2019-09-29 | 2020-01-07 | 青岛理工大学 | Air cooling device and method applied to dry centrifugal granulation of blast furnace slag |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106939363B (en) | For molten slag dry-type centrifugal granulation and the system and control method of waste heat recycling | |
| WO2019161638A1 (en) | Liquid slag dry centrifugal granulation and waste heat recovery system having slag buffer and flow control function | |
| CN105603135B (en) | A kind of high-temperature liquid state slag dry-type centrifugal granulation residual neat recovering system and method | |
| CN108359756A (en) | One kind is for molten slag dry-type centrifugal granulation and waste heat recycling system | |
| CN108330234B (en) | Dry-type centrifugal granulation and waste heat recovery experimental device | |
| CN210886084U (en) | Air cooling device applied to dry centrifugal granulation of blast furnace slag | |
| CN205893290U (en) | Do slag granulation system and be used for gaseous equipment to supply of slag granulation system futilely of control cooling | |
| CN205115504U (en) | High slag dry process granulation and heat recovery system | |
| US20200232064A1 (en) | Control System and Method for Dry Centrifugal Granulation of Liquid Slag | |
| CN108330232B (en) | Liquid slag dry centrifugal granulating slag particle size control method | |
| WO2019161697A1 (en) | Liquid-state slag dry-type centrifugal granulation slag particles quality regulating method | |
| CN103194561A (en) | Device for directly adding sintering returned dust into ladle | |
| CN110656211A (en) | Air cooling device and method applied to dry centrifugal granulation of blast furnace slag | |
| CN203976420U (en) | A kind of boiling chloridizing furnace automatic feeding device | |
| CN111020074B (en) | Liquid slag waste heat recovery device capable of strengthening slag heat exchange and operation method thereof | |
| CN109013039A (en) | A kind of intelligence control system and intelligent control method of vertical grinder slag production line | |
| CN110156352A (en) | A kind of preparation method of air quenching metallurgical slag microballon | |
| CN203960246U (en) | The top hot blast air-supply arrangement of blast furnace iron notch | |
| CN106636496A (en) | Blast furnace slag dry granulation and heat recovery system and method | |
| CN202131318U (en) | Metallurgical slag guiding-in device and slag dry quenching equipment | |
| CN205603614U (en) | Broken centrifugal dry granulation device of high slag heat | |
| CN204508110U (en) | Cyclone type thermal powerplant coal bunker block clearing equipment | |
| CN113979617A (en) | Production device and production process of basalt scales | |
| CN208649354U (en) | A kind of jet stream granulation spray gun and slag granulating heat-exchanger rig | |
| CN108823409B (en) | System and method for recovering waste heat of liquid magnesium chloride generated in titanium sponge preparation process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200630 Termination date: 20210929 |