CN212538731U - Resource-saving long-age hot air cupola furnace - Google Patents
Resource-saving long-age hot air cupola furnace Download PDFInfo
- Publication number
- CN212538731U CN212538731U CN202021908717.3U CN202021908717U CN212538731U CN 212538731 U CN212538731 U CN 212538731U CN 202021908717 U CN202021908717 U CN 202021908717U CN 212538731 U CN212538731 U CN 212538731U
- Authority
- CN
- China
- Prior art keywords
- bell
- furnace
- small
- rope
- cupola
- 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
Images
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The utility model relates to a cupola furnace smelting equipment technical field, in particular to a resource-saving long-age hot air cupola furnace. The cupola furnace comprises a cupola furnace base, a furnace hearth part, a furnace body part, a charging hole, a chimney, a smoke gas descending pipe, a furnace top part, a cooling water pipe of the muffle furnace, a hot air pipe of the muffle furnace, an air inlet branch pipe in the furnace, a mud gun plugging machine and an iron outlet. The utility model solves the problems that the highest furnace temperature in the thin and thin cupola furnace can only obtain about 1500 ℃, and the furnace is lack of sufficient reducing atmosphere. Is not suitable for smelting the raw materials of waste steel slag, waste ore, waste scrap iron and the like. The utility model can improve the furnace temperature of the cupola furnace, is beneficial to smelting raw materials such as waste steel slag, waste ore and the like, and improves the production efficiency; the cupola furnace gas can be recycled, the exhaust emission is reduced, the resources and the energy are saved, and the clean production is realized.
Description
Technical Field
The utility model relates to a cupola furnace smelting equipment technical field, in particular to a resource-saving long-age hot air cupola furnace.
Background
The cupola furnace for smelting cast iron includes 15 ton/hr, 20 ton/hr, 25 ton/hr long-life hot blast cupola furnace, and the cupola furnace body is thin and is used mainly for smelting cast iron, returned cast iron, partial waste steel and other material. Under the general working conditions, the maximum furnace temperature of the thin and thin cupola furnace can only be about 1500 ℃, and the furnace also lacks enough reducing atmosphere. Is not suitable for smelting the raw materials of waste steel slag, waste ore, waste scrap iron and the like. Therefore, the long-age hot air cupola furnace needs to be improved for smelting the raw materials of waste steel slag, waste ore, waste scrap iron and the like to realize the utilization of three wastes.
Disclosure of Invention
The maximum furnace temperature in the cupola furnace of the thin shape can only be about 1500 ℃, and the furnace is lack of sufficient reducing atmosphere. Is not suitable for smelting the raw materials of waste steel slag, waste ore, waste scrap iron and the like. The utility model provides a resource-saving long-age hot air cupola furnace.
In order to realize the purpose, the utility model discloses a technical scheme is:
a resource-saving long-age hot air cupola comprises a cupola base, a furnace cylinder part, a furnace body part, a charging hole, a chimney, a smoke gas downcomer, a furnace top part, a cooling water pipe of a muffle, a hot air pipe of the muffle, an air inlet branch pipe in the furnace, a mud gun plugging machine and an iron outlet; the inner diameter of the furnace hearth of the furnace body part is 12-15% larger than that of the cupola with the same tonnage, the thin and thin furnace type is changed into the coarse fertilizer furnace type, and the temperature of the cupola can be increased by 100-.
Further, the furnace top portion includes: an upper bell-type charging hopper, a double bell-type sealed storage bin, a lower bell-type furnace middle cover, a large bell lifting pipe, a small bell and a small bell lifting pipe;
the upper bell-type charging hopper is provided with a large upper round opening and a small lower round opening which are arranged in parallel;
the double-bell sealed storage bin is in a round drum shape, and an upper feeding round opening and a lower discharging round opening are arranged in parallel up and down;
the middle cover of the lower bell-type furnace is provided with a small upper round opening and a large lower round opening, and the upper round opening and the lower round opening are arranged in parallel;
the big bell is in a big horn shape and can be arranged under the double bell sealed storage bin in an opening and closing way, and the big bell lifting pipe is vertically arranged above the big bell;
the small bell is in a small horn shape and can be arranged right above the inner side of the double bell sealed storage bin in an opening and closing way; the small bell lifting pipe is arranged right above the small bell;
the upper bell-type charging hopper, the double-bell-type sealed storage bin, the lower bell-type furnace middle cover, the large bell lifting pipe, the small bell and the small bell lifting pipe are all arranged vertically to the cupola body in concentric circles;
the periphery of the upper opening of the upper bell-type charging hopper and the bottom edge of the charging opening are horizontal reference surfaces and are horizontally and hermetically connected with the inner periphery of the furnace at the top part of the furnace;
the outer side of the lower part of the upper bell-type charging hopper is hermetically connected with the upper opening of the double-bell airtight storage bin;
the outer side of the lower opening part of the double-bell airtight storage bin is hermetically connected with the upper opening of the lower bell-type furnace cover;
the periphery of a lower opening of a middle cover of the lower bell-type furnace is horizontally and hermetically connected with the periphery of the furnace inside the furnace top part;
the big bell lifting pipe and the small bell lifting pipe are arranged in a vertical sleeve type, the big bell lifting pipe is arranged in the small bell lifting pipe, and the big bell lifting pipe and the small bell lifting pipe can slide up and down relatively.
In a further step, the furnace top part further comprises the big and small bell vertical lifting devices and a rope pulley fixing bracket, and the big and small bell vertical lifting devices comprise: a small bell lifting rope 1, a small bell lifting rope 2, a small bell rope pulley 1 and a small bell rope pulley 2; a big bell lifting rope and a big bell rope wheel;
one end of the small bell lifting rope 1 and one end of the small bell lifting rope 2 are respectively fixedly connected with two sides of the top of the small bell lifting pipe; the other end of the small bell lifting rope 1 and the other end of the small bell lifting rope 2 are respectively connected with the small bell rope wheel 1 and the small bell rope wheel 2 in a sliding way;
one end of the big bell lifting rope is fixedly connected with the top of the big bell lifting pipe, and the other end of the big bell lifting rope is slidably connected with the big bell rope wheel;
the rope wheel fixing support is arranged on the inner wall of the furnace at the upper part of the furnace top part, and the small bell rope wheel 1, the small bell rope wheel 2 and the large bell rope wheel are respectively connected with the rope wheel fixing support; the small bell lifting rope 1, the small bell lifting rope 2 and the large bell lifting rope are respectively connected with a winch and an automatic transmission device (the device belongs to conventional arrangement, and is not shown in the attached drawing) arranged outside the furnace at the furnace top part through the small bell rope pulley 1, the small bell rope pulley 2 and the large bell rope pulley, so that the opening and closing actions of the large bell and the small bell are respectively realized.
Further, the roof section further comprises: the gas outlet on the left side of the furnace and the gas outlet on the right side of the furnace are both cylindrical, are respectively symmetrically and fixedly arranged on the outer peripheral wall of the cupola at the lower opening of the middle cover (73) of the lower bell-type furnace in parallel and are communicated with the inside of the furnace.
The utility model relates to a when resource-saving type long-age hot-blast cupola furnace moves, at first will when the cupola furnace lights and waits to feed in raw materials, will smelt raw materials such as required steel slag scrap, waste ore, scrap iron bits and required limestone solvent according to different raw materials and solvent weight of every batch, follow the cupola furnace respectively the charge door adds through last bell-type loading hopper. The specific operation sequence is as follows: and (3) starting the vertical lifting device of the large bell and the small bell, firstly opening the small bell downwards when the large bell and the small bell are in a closed state, adding the required raw materials or solvents into the double bell storage bin from the upper bell-type hopper, then closing the small bell upwards, opening the large bell downwards, and after the raw materials or solvents in the double bell storage bin are discharged into the cupola furnace, closing the large bell upwards. The process is repeated in this way, and the cupola furnace is sealed for charging.
The utility model is suitable for a smelt and use waste steel slag, waste ore, scrap iron bits etc. as the raw materials, the production tonnage is: 15 tons/hour, 20 tons/hour, 25 tons/hour long-life hot blast cupola furnace.
The utility model discloses following beneficial effect can be realized:
1. the utility model discloses because than the thin and thin type cupola of the same tonnage that compares has increaseed furnace diameter, has increased the furnace volume, has increased the burning quantity of raw materials, and has set up the airtight storage silo of two bell at the cupola feed inlet department again, has blocked the interior heat source of stove and has risen extravagantly, not only can furthest energy saving, still obviously than the cupola furnace temperature of the same tonnage, improve 100 + 200 ℃.
2. The utility model realizes the airtight feeding of the cupola furnace and blocks the direct cupola furnace gas and reduces the exhaust emission pollution because the double bell airtight storage bin is arranged at the feeding port of the cupola furnace.
3. The utility model discloses can effectively improve the interior center of stove and border air current state of cupola, reducing atmosphere in the increase stove for the interior raw materials of stove can tend to synchronous downward direct motion, can accelerate the smelting speed of raw materials such as waste steel slag and waste ore in the stove, improve production efficiency.
4. The utility model discloses the difference level of symmetry has set up stove left side coal gas export and stove right side coal gas export on the lower bell jar formula furnace lower cover lower port department oven down, can carry the unnecessary waste gas that constantly produces in the stove to ball formula hot-blast furnace heating cold wind temperature and carry to gas boiler and carry out make full use of. And because the coal gas outlets are symmetrically arranged, the combustion atmosphere in the furnace cannot be changed, and the smooth operation of the cupola furnace cannot be influenced.
In conclusion, the utility model can increase the temperature of the cupola furnace, increase the reducing atmosphere in the furnace, facilitate the smelting of the raw materials such as waste steel slag, waste ore and the like, and improve the production efficiency; the cupola furnace gas can be recycled, the exhaust emission is reduced, resources and energy sources are saved, the environmental pollution is reduced, clean production is realized, and the comprehensive economic benefit is improved.
Drawings
FIG. 1 is a schematic elevation view of a resource-saving, long-life, hot-blast cupola;
FIG. 2 is a schematic view showing a control of a thin and long-aged hot-air cupola furnace;
fig. 3 is a schematic view of the top part of the cupola furnace closed feeding device.
In the figure: 1-cupola base, 2-hearth part, 3-furnace body part, 4-charging hole, 5-chimney, 6-smoke gas down pipe, 7-furnace top part, 8-cooling water pipe around furnace, 9-hot air pipe around furnace, 10-air inlet branch pipe inside furnace, 11-mud gun plugging machine, 12-iron outlet;
wherein: 71-an upper bell-type charging hopper, 72-a double bell-type sealed storage bin, 73-a lower bell-type furnace middle cover, 74-a large bell, 75-a large bell lifting pipe, 76-a small bell, 77-a small bell lifting pipe, 78-a large bell vertical lifting device and 79-a rope pulley fixing support;
781-small bell lifting rope 1, 782-small bell lifting rope 2, 783-small bell rope wheel 1, 784-small bell rope wheel 2; 785-a large bell lifting rope and 786-a large bell rope wheel;
80-left gas outlet of the furnace, 81-right gas outlet of the furnace.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1-3, the resource-saving long-life hot-air cupola furnace in the embodiment comprises a cupola furnace base (1), a furnace cylinder part (2), a furnace body part (3), a charging hole (4), a chimney (5), a smoke gas downcomer (6), a furnace top part (7), a muffle cooling water pipe (8), a muffle hot-air pipe (9), an in-furnace air inlet branch pipe (10), a mud gun plugging machine (11) and an iron outlet (12); the method is characterized in that the inner diameter of the hearth of the furnace body part (3) is 12-15% larger than that of the cupola with the same tonnage, the thin and thin furnace type is improved into the coarse fertilizer furnace type, and the temperature of the cupola can be increased by 100-.
Further, the roof section (7) comprises: an upper bell-type charging hopper (71), a double bell-type sealed storage bin (72), a lower bell-type furnace middle cover (73), a large bell (74), a large bell lifting pipe (75), a small bell (76) and a small bell lifting pipe (77);
the upper bell-type charging hopper (71) is provided with a large upper round opening and a small lower round opening which are arranged in parallel;
the double-bell sealed storage bin (72) is in a round drum shape, and an upper feeding round opening and a lower discharging round opening are arranged in parallel up and down;
the middle cover (73) of the lower bell-type furnace is provided with a small upper round opening and a large lower round opening which are arranged in parallel;
the big bell (74) is in a big horn shape and is arranged under the double bell sealed storage bin (72) in an openable and closable manner, and the big bell lifting pipe (75) is vertically arranged above the big bell (74);
the small bell (76) is in a small horn shape and can be arranged right above the inner side of the double bell sealed storage bin (72) in an opening and closing way; the small bell lifting pipe (77) is arranged right above the small bell (76);
the upper bell-type charging hopper (71), the double bell-type sealed storage bin (72), the lower bell-type furnace middle cover (73), the large bell (74), the large bell lifting pipe (75), the small bell (76) and the small bell lifting pipe (77) are all arranged vertically to the cupola body in concentric circles;
the outer periphery of the upper opening of the upper bell-type charging hopper (71) and the bottom edge of the charging opening (4) are horizontal reference surfaces and are horizontally and hermetically connected with the inner periphery of the furnace top part (7);
the outer side of the lower part of the upper bell-type charging hopper (71) is hermetically connected with the upper opening of the double-bell airtight storage bin (72);
the outer side of the lower opening of the double-bell sealed storage bin (72) is hermetically connected with the upper opening of a middle cover (73) of the lower bell-type furnace;
the periphery of the lower opening of the middle cover (73) of the lower bell-type furnace is horizontally and hermetically connected with the inner periphery of the furnace top part (7);
big bell lifting pipe (75) with little bell lifting pipe (77) are vertical sleeve formula setting, big bell lifting pipe (75) set up in little bell lifting pipe (77), big bell lifting pipe (75) with little bell lifting pipe (77) can slide the lift from top to bottom relatively.
Further, the furnace top portion (7) further comprises a large bell vertical lifting device (78) and a small bell vertical lifting device (78) and a rope wheel fixing bracket (79), and the large bell vertical lifting device (78) and the small bell vertical lifting device (78) comprise: a small bell lifting rope 1(781), a small bell lifting rope 2(782), a small bell rope wheel 1(783) and a small bell rope wheel 2 (784); a big bell lifting rope (785) and a big bell rope wheel (786);
one end of the small bell lifting rope 1(781) and one end of the small bell lifting rope 2(782) are respectively and fixedly connected with two sides of the top of the small bell lifting pipe (77); the other end of the small bell lifting rope 1(781) and the other end of the small bell lifting rope 2(782) are respectively connected with the small bell rope wheel 1(783) and the small bell rope wheel 2(784) in a sliding way;
one end of the big bell lifting rope (785) is fixedly connected with the top of the big bell lifting pipe (75), and the other end of the big bell lifting rope (785) is slidably connected with the big bell rope wheel (786);
the rope wheel fixing support (79) is horizontally arranged on the inner wall of the upper furnace of the furnace top part (7), and the small bell rope wheel 1(783), the small bell rope wheel 2(784) and the large bell rope wheel (786) are respectively connected with the rope wheel fixing support (79); the small bell lifting rope 1(781), the small bell lifting rope 2(782) and the large bell lifting rope (785) are respectively connected with a winch and an automatic transmission device arranged outside the furnace top part (7) through the small bell rope pulley 1(783), the small bell rope pulley 2(784) and the large bell rope pulley (786) (the device belongs to the conventional arrangement, and is not shown in the attached drawing), so that the opening and closing actions of the large bell and the small bell are respectively realized.
Further, the roof section (7) further comprises: the gas outlet (80) on the left side of the furnace and the gas outlet (81) on the right side of the furnace are both cylindrical, are respectively symmetrically, parallelly and fixedly arranged on the outer peripheral wall of the cupola furnace at the lower opening of the middle cover (73) of the lower bell-type furnace and are communicated with the inside of the furnace.
The utility model relates to a when resource-saving type long-age hot-blast cupola furnace moves, at first will when the cupola furnace lights and waits to feed in raw materials, will smelt raw materials such as required steel slag scrap, waste ore, scrap iron bits and required limestone solvent according to different raw materials and solvent weight of every batch, respectively follow the cupola furnace charge door (4) and add through last bell-type loading hopper (71). The specific operation sequence is as follows: and (3) starting the vertical lifting device (78) of the large bell and the small bell, firstly opening the small bell (76) downwards when the large bell and the small bell are in a closed state, adding required raw materials or solvents into the double bell storage bin (72) from the upper bell-type hopper (71), then closing the small bell (76) upwards, opening the large bell (74) downwards, and closing the large bell (74) upwards after the raw materials or solvents in the double bell storage bin (72) are discharged into the cupola furnace. The process is repeated in this way, and the cupola furnace is sealed for charging.
The utility model is suitable for a smelt and use waste steel slag, waste ore, scrap iron bits etc. as the raw materials, the production tonnage is: 15 tons/hour, 20 tons/hour, 25 tons/hour long-life hot blast cupola furnace.
Claims (4)
1. A resource-saving long-age hot air cupola comprises a cupola base (1), a hearth part (2), a furnace body part (3), a charging hole (4), a chimney (5), a smoke gas descending pipe (6), a furnace top part (7), a cooling water pipe (8) of a muffle, a hot air pipe (9) of the muffle, an air inlet branch pipe (10) in the furnace, a mud gun plugging machine (11) and an iron outlet (12); the furnace is characterized in that the inner diameter of the furnace hearth of the furnace body part (3) is 12-15% larger than that of a cupola furnace with the same tonnage, and the thin and thin furnace type is improved into a coarse-fat furnace type.
2. A resource-saving, long-life, hot-blast cupola furnace according to claim 1, in which the roof section (7) comprises: an upper bell-type charging hopper (71), a double bell-type sealed storage bin (72), a lower bell-type furnace middle cover (73), a large bell (74), a large bell lifting pipe (75), a small bell (76) and a small bell lifting pipe (77);
the upper bell-type charging hopper (71) is provided with a large upper round opening and a small lower round opening which are arranged in parallel;
the double-bell sealed storage bin (72) is in a round drum shape, and an upper feeding round opening and a lower discharging round opening are arranged in parallel up and down;
the middle cover (73) of the lower bell-type furnace is provided with a small upper round opening and a large lower round opening which are arranged in parallel;
the big bell (74) is in a big horn shape and is arranged under the double bell sealed storage bin (72) in an openable and closable manner, and the big bell lifting pipe (75) is vertically arranged above the big bell (74);
the small bell (76) is in a small horn shape and can be arranged right above the inner side of the double bell sealed storage bin (72) in an opening and closing way; the small bell lifting pipe (77) is arranged right above the small bell (76);
the upper bell-type charging hopper (71), the double bell-type sealed storage bin (72), the lower bell-type furnace middle cover (73), the large bell (74), the large bell lifting pipe (75), the small bell (76) and the small bell lifting pipe (77) are all arranged vertically to the cupola body in concentric circles;
the outer periphery of the upper opening of the upper bell-type charging hopper (71) and the bottom edge of the charging opening (4) are horizontal reference surfaces and are horizontally and hermetically connected with the inner periphery of the furnace top part (7);
the outer side of the lower part of the upper bell-type charging hopper (71) is hermetically connected with the upper opening of the double-bell airtight storage bin (72);
the outer side of the lower opening of the double-bell sealed storage bin (72) is hermetically connected with the upper opening of a middle cover (73) of the lower bell-type furnace;
the periphery of the lower opening of the middle cover (73) of the lower bell-type furnace is horizontally and hermetically connected with the inner periphery of the furnace top part (7);
big bell lifting pipe (75) with little bell lifting pipe (77) are vertical sleeve formula setting, big bell lifting pipe (75) set up in little bell lifting pipe (77), big bell lifting pipe (75) with little bell lifting pipe (77) can slide the lift from top to bottom relatively.
3. The resource efficient, long-life, hot-blast cupola according to claim 2, wherein the roof section (7) further comprises the large and small bell elevators (78) and the sheave fixing brackets (79), the large and small bell elevators (78) comprising: a small bell lifting rope 1(781), a small bell lifting rope 2(782), a small bell rope wheel 1(783) and a small bell rope wheel 2 (784); a big bell lifting rope (785) and a big bell rope wheel (786);
one end of the small bell lifting rope 1(781) and one end of the small bell lifting rope 2(782) are respectively and fixedly connected with two sides of the top of the small bell lifting pipe (77); the other end of the small bell lifting rope 1(781) and the other end of the small bell lifting rope 2(782) are respectively connected with the small bell rope wheel 1(783) and the small bell rope wheel 2(784) in a sliding way;
one end of the big bell lifting rope (785) is fixedly connected with the top of the big bell lifting pipe (75), and the other end of the big bell lifting rope (785) is slidably connected with the big bell rope wheel (786);
the rope wheel fixing support (79) is horizontally arranged on the inner wall of the upper furnace of the furnace top part (7), and the small bell rope wheel 1(783), the small bell rope wheel 2(784) and the large bell rope wheel (786) are respectively connected with the rope wheel fixing support (79); the small bell lifting rope 1(781), the small bell lifting rope 2(782) and the large bell lifting rope (785) are respectively connected with a winch and an automatic transmission device arranged outside the furnace top part (7) through the small bell rope pulley 1(783), the small bell rope pulley 2(784) and the large bell rope pulley (786) to respectively realize the opening and closing actions of the large bell and the small bell.
4. A resource-saving long-life hot-blast cupola furnace according to claim 2, in which the roof section (7) further comprises: the gas outlet (80) on the left side of the furnace and the gas outlet (81) on the right side of the furnace are both cylindrical, are respectively symmetrically, parallelly and fixedly arranged on the outer peripheral wall of the cupola furnace at the lower opening of the middle cover (73) of the lower bell-type furnace and are communicated with the inside of the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021908717.3U CN212538731U (en) | 2020-09-04 | 2020-09-04 | Resource-saving long-age hot air cupola furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021908717.3U CN212538731U (en) | 2020-09-04 | 2020-09-04 | Resource-saving long-age hot air cupola furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212538731U true CN212538731U (en) | 2021-02-12 |
Family
ID=74528320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021908717.3U Expired - Fee Related CN212538731U (en) | 2020-09-04 | 2020-09-04 | Resource-saving long-age hot air cupola furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212538731U (en) |
-
2020
- 2020-09-04 CN CN202021908717.3U patent/CN212538731U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109880959B (en) | Method for increasing addition proportion of converter scrap steel | |
| CN108707714A (en) | A kind of steel scrap and iron content solid waste multi-functional melt furnace | |
| CN102277463B (en) | Reduction furnace and device for producing direct reduced iron | |
| CN202074839U (en) | Environment friendly scrap preheater | |
| CN212538731U (en) | Resource-saving long-age hot air cupola furnace | |
| CN201605307U (en) | Smelting furnace for laterite nickel ore | |
| CN201250266Y (en) | Gold concentrate sulfating fluosolid roaster | |
| CN111912218A (en) | Resource-saving long-age hot air cupola furnace | |
| CN202626235U (en) | Equipment for producing steel-making slag former by virtue of steel-making sludge | |
| CN2804754Y (en) | Microwave smelting-furnace | |
| CN210420085U (en) | Chain type pre-reduction metallurgy solid waste pellet roasting machine | |
| CN201276588Y (en) | Environment friendly energy-saving reducing smelting furnace for secondary metal | |
| CN201553701U (en) | Coke dry quenching oven housing with novel structure | |
| CN101280358B (en) | Reducing smelting furnace for regenerating metals | |
| CN2367991Y (en) | Efficient energy-saving vertical drying kiln | |
| CN201217665Y (en) | Novel furnace cupola system for melting carbonaceous ball of iron oxide | |
| CN212560333U (en) | Stepped rotary hearth furnace | |
| CN2412018Y (en) | Enclosed zinc-smelting furnace | |
| CN210426115U (en) | Automatic preheating feeder for top of submerged arc furnace | |
| CN1153837C (en) | Process for smelting zinc | |
| CN110042250B (en) | Cold aluminum slag regeneration recycling system and cold aluminum slag regeneration method | |
| CN2405174Y (en) | Equipment for preheating waste steel using flue gas from vertical kiln-electric furnace combination | |
| CN203785423U (en) | Calcination rotary kiln | |
| CN202648371U (en) | External-heat, air-blowing and water-cooling cupola furnace with long furnace age | |
| CN208604025U (en) | The closed calcination lime burner production line of loop tunnel type subregion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210212 Termination date: 20210904 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |