CN110926221B - Method for preventing bursting of refractory material of receiving hopper of annular cooling machine - Google Patents
Method for preventing bursting of refractory material of receiving hopper of annular cooling machine Download PDFInfo
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- CN110926221B CN110926221B CN201911278957.1A CN201911278957A CN110926221B CN 110926221 B CN110926221 B CN 110926221B CN 201911278957 A CN201911278957 A CN 201911278957A CN 110926221 B CN110926221 B CN 110926221B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1678—Increasing the durability of linings; Means for protecting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention belongs to the technical field of 'chain grate-rotary kiln-circular cooler' oxidized pellet production processes, and particularly discloses a method for preventing a receiving hopper of a circular cooler from cracking refractory materials, which comprises the following steps: (1) pouring a refractory material containing 8-12wt% of water on the four steel shells of the receiving hopper of the annular cooler, wherein the thickness of the refractory material is 240-250 mm; (2) the temperature of the atmosphere in the receiving hopper of the ring cooling machine is kept at 250-320 ℃ by adjusting the feeding amount of the receiving hopper of the ring cooling machine, and the keeping time is 6-8 h; (3) and increasing the feeding amount of the receiving hopper of the ring cooling machine, so that the temperature of the atmosphere in the receiving hopper of the ring cooling machine is kept at 470-530 ℃ for 18-16 h. The invention adopts a hot ball baking method of a thin material layer and a fast ring speed of the ring cooling machine, namely a control method of reasonably controlling the temperature of a first cooling section of the ring cooling machine, so that the newly replaced refractory material in the receiving hopper is dried and removed at relatively low temperature for molecular water and crystal water.
Description
Technical Field
The invention belongs to the technical field of 'chain grate-rotary kiln-circular cooler' oxidized pellet production processes, and particularly relates to a method for preventing burst of refractory materials of a receiving hopper of a circular cooler.
Background
The circular cooler is one of the important equipments in the production process of oxidized pellets of 'chain grate-rotary kiln-circular cooler', and is mainly used for cooling pellets up to nearly 1200 ℃. The specific method comprises the following steps: the pellet ore in the rotary kiln, which is up to nearly 1200 ℃, directly enters the receiving hopper, is accumulated in the receiving hopper to form a certain height, the material is leveled and compacted by a leveling weight with the height of 800mm, and the pellet ore in the receiving hopper is evenly distributed on each trolley along with the annular operation of the circular cooler. And in the running process of the circular cooler, the lower part is adopted to carry out blast cooling, and finally the pellet is cooled to the required temperature.
In order to meet the requirement of stable operation of the ring cooling machine in a high-temperature state, each part of the ring cooling machine needs to be protected by using a refractory material with a certain thickness, particularly, the refractory material of the receiving hopper of the ring cooling machine is cast in situ by using a casting material containing 8-12% of moisture, and the thickness is 240-250 mm. Like this the cold quick-witted hopper of nai material of ring examines and repair the change back at every turn, must dry molecular water and crystal water under the relatively lower temperature, get rid of, but because the cold machine of ring does not have the stoving heat source, only the red-hot pellet in the rotary kiln directly gets into cold quick-witted hopper of ring for the refractory material at this position all appears obviously bursting problem after changing at every turn, make local or large tracts of land thickness reduce, direct naked steel armour even, thereby make the refractory material of cold machine hopper of ring use less than 4 months and just be forced to the maintenance of stopping production, thereby seriously restrict the stability of operation production.
The chinese utility model patent specification with publication number CN 202532902U, publication No. 11/14/2012 discloses a steel-concrete fire-resistant durable receiving hopper for a ring cooling machine, which comprises a square receiving hopper body with four inner vertical surfaces and a fire-resistant lining layer fixedly connected with the inner surface of the square receiving hopper body, and is characterized in that the fire-resistant lining layer consists of a set of prefabricated brick square sealing strips and a set of casting material square sealing strips which are sequentially staggered from bottom to top, the prefabricated brick square sealing strips consist of a set of prefabricated refractory bricks which are provided with pre-embedded heat-resistant anchoring parts and are horizontally spliced with each other and a crack filler which is spliced with the set of prefabricated refractory bricks, the crack filler is a solidified substance of high-temperature refractory slurry, the pre-embedded heat-resistant anchoring parts are welded with the inner surface of the square receiving hopper body, and the casting material square sealing strips consist of a set of pre-embedded heat-resistant anchoring nails and heavy casting material filler which are horizontally and evenly distributed, the embedded heat-resistant anchoring nails are welded with the inner surface of the square receiving hopper body. Asphalt is smeared on the surface of the heat-resistant anchoring nail. The use of a refractory material of the above construction is also prone to cracking problems. Through retrieval, no relevant literature for solving the problem of cracking of the refractory material of the receiving hopper of the circular cooler is retrieved.
Disclosure of Invention
The invention aims to provide a method for preventing a refractory material of a receiving hopper of a ring cooling machine from bursting. The new replacement refractory in the receiving hopper requires drying and removal of molecular water and crystal water at relatively low temperatures.
The invention aims to realize the following technical scheme, and the method for preventing the burst of the refractory material of the receiving hopper of the ring cooling machine is characterized by comprising the following steps of:
(1) pouring a refractory material containing 8-12wt% of water on the four steel shells of the receiving hopper of the annular cooler, wherein the thickness of the refractory material is 240-250 mm;
(2) the feeding amount of the receiving hopper of the annular cooler is adjusted, so that the temperature of the atmosphere in the receiving hopper of the annular cooler is kept at 320 ℃ at 250 ℃ for 6-8 h;
(3) and increasing the feeding amount of the receiving hopper of the ring cooling machine, so that the temperature of the atmosphere in the receiving hopper of the ring cooling machine is kept at 470-530 ℃ for 18-16 h.
Preferably, the feeding amount of the receiving hopper in the step (1) is 60 to 70 tons/hour.
Preferably, the feeding amount of the receiving hopper in the step (2) is 120-150 tons/hour.
Preferably, when the step (1) and the step (2) are operated, the blast cooling fan corresponding to the receiving hopper is turned off, and after the step (2) is finished, the blast cooling fan corresponding to the receiving hopper is turned on.
Preferably, the material distribution thickness of the ring cooling machine trolley in the step (1) and the step (2) is 10-30mm, and the running speed of the ring cooling machine trolley is 1.7-1.9 revolutions per hour.
Compared with the prior art, the invention has the following beneficial effects:
firstly, in order to thoroughly solve the problem that the refractory material of the receiving hopper of the ring cooling machine bursts during each overhaul and replacement, the applicant successfully develops a 'method for preventing the refractory material of the receiving hopper of the ring cooling machine from bursting' through repeated research, and the verification technology adopts a hot ball baking method for a thin material layer and a fast ring speed of the ring cooling machine, namely a control method for reasonably controlling the temperature of a first cooling section (a cooling section corresponding to the receiving hopper of the ring cooling machine) of the ring cooling machine. The new replacement refractory in the receiving hopper requires drying and removal of molecular water and crystal water at relatively low temperatures. According to the characteristics of the refractory material, the corresponding temperatures are respectively 250-320 ℃ and 470-530 ℃. Although the receiving hopper of the circular cooler has no temperature measuring facility, the temperature of the first cooling section of the circular cooler can directly reflect the specific condition of the actual temperature in the receiving hopper. Therefore, the reasonable control of the temperature of a cold section is directly related to the drying effect of the refractory material of the receiving hopper, and is also a control means for avoiding bursting. In order to meet the requirement of temperature control in two stages of removing refractory molecular water and crystal water, a fast ring speed control technology is adopted, and the temperature of a first cooling section is kept within the range of 250-320 ℃ by dynamically adjusting the running speed of a ring cooling machine at the same time for 6-8 h; 470 ℃ and 530 ℃ for 16-18h, so that the moisture of the refractory material is uniformly and completely removed.
Secondly, before a method for preventing the burst of refractory materials of a receiving hopper of the ring cooling machine is developed, after the refractory materials of the receiving hopper of the ring cooling machine are overhauled and started up each time, a production mode that all six billiard ball disks are opened within 12 hours is adopted, and the method specifically comprises the following steps: firstly, in the first 3 hours, two ball trays are opened, and the feeding quantity of a receiving hopper reaches 60-70 tons/hour; in the 4 th to 5 th hours, opening a 3 rd ball tray, and enabling the feeding amount of a receiving hopper to reach 200 plus 220 tons/hour; thirdly, opening a 4 th ball tray in 6 th to 7 th hours, wherein the feeding amount of a receiving hopper reaches 280 plus materials of 300 tons/hour; fourthly, opening a 5 th ball tray for 8 to 10 hours, and enabling the feeding quantity of a receiving hopper to be 360 and 380 tons/hour; 11-12 hours, opening all the six billiard disks, and enabling the feeding amount of the receiving hopper to reach 430 and 450 tons/hour.
In order to realize the drying of the refractory material, the invention reasonably controls the amount of hot balls entering the receiving hopper of the circular cooler in the rotary kiln, so that the heat not only meets the requirement of baking the moisture of the refractory material, but also avoids the bursting of the refractory material caused by higher temperature. The specific method comprises the following steps: after the circulation air cooler receiving hopper refractory material is overhauled and started up every time, a production mode of two constant ball trays is adopted, and the time is kept for 24 hours.
When the molecular water needs to be evaporated, the temperature of the receiving hopper is kept at 250-320 ℃, and the feeding quantity of the receiving hopper is 60-70 tons/hour; when the crystal water is evaporated, the temperature of the receiving hopper is kept at 470-530 ℃, the feeding amount of the receiving hopper is kept at 120-150 tons/h, and the feeding amount is one fourth of the normal feeding amount.
Thirdly, in order to realize the drying of the refractory material, the invention adopts a control method of the thin material layer of the circular cooler. In order to avoid the problem that the receiving hopper of the ring cooling machine cracks in the refractory drying process due to heat concentration of the receiving hopper, a control method that the receiving hopper is not piled and the thin material layer of the trolley of the ring cooling machine is distributed is adopted, so that the hot balls are prevented from directly contacting the refractory material of the receiving hopper of the ring cooling machine as far as possible, and the radiation heat of the hot balls is used for drying the moisture of the refractory material. The non-stacking of the receiving hopper is mainly realized by improving the running speed of the trolley. The running speed of the trolley is 1.4-1.6 revolutions per hour in normal production, the running speed of the trolley is increased to 1.7-1.9 revolutions per hour, the thin material layer distribution of the trolley of the annular cooler is realized, and the thickness is reduced from the original 800mm to 10-30 mm.
Fourthly, in order to dry the refractory material, the invention adopts a control method that the circular cooler 1# blast cooler does not run. The pellet cools in the cold machine of ring carries out the mode of cooling for blowing the direct cooling in the platform truck lower part, and the cold machine of ring receives the hopper and is in the cooling control scope of 1# air-blower, like this under the condition that the air-blower was opened, especially along with the increase of cooling air volume, red-hot pellet can cool off fast, must make the heat that produces also corresponding improvement among the cooling process to cause the problem that the resistant material of receiving the heat fill appears bursting. Therefore, in order to avoid the problem of heat concentration of the receiving hopper caused by cooling, a control method that the circular cooler No. 1 blast cooling fan does not operate is adopted, and the hot balls in the receiving hopper of the circular cooler are brought into other areas without refractory material replacement for cooling, so that the heat of the receiving hopper is effectively controlled.
Fifthly, the invention thoroughly solves the problem of bursting of the refractory material of the receiving hopper of the ring cooling machine, and prolongs the service life of the refractory material at the position to more than 1 year. The time of at least 5 days is needed for overhauling and replacing the refractory material of the receiving hopper of the ring cooling machine every time, the service life is prolonged to 1 year from 4 months, the overhauling time can be reduced by 10 days every year, and the total of the two production lines is 20 days. According to the measurement of 1 ten thousand tons of daily output, 20 ten thousand tons of pellet ore can be produced each year, and the economic benefit is obvious; meanwhile, the refractory material and the labor cost can be effectively saved.
Detailed Description
The present invention is further illustrated by the following detailed description, which is to be construed as merely illustrative and not limitative of the remainder of the disclosure, and modifications and variations such as those ordinarily skilled in the art are intended to be included within the scope of the present invention as defined in the appended claims.
Example 1
A method for preventing the bursting of refractory materials of a receiving hopper of a circular cooler comprises the following steps:
(1) the refractory material poured on the four-side steel armor of the receiving hopper of the ring cooling machine comprises aggregate and water, the moisture content of the refractory material is 8-12wt% of the refractory material aggregate, and the chemical components of the refractory material aggregate are mainlyFrom Al2O3、SiO2Composition of Al2O3 :65-72 wt%、SiO224-30 wt%, the rest is other metal oxide.
(2) The feeding amount of the receiving hopper of the annular cooler is adjusted, so that the temperature of the atmosphere in the receiving hopper of the annular cooler is kept at 250-320 ℃, and the holding time is 6 h; the feeding amount of the receiving hopper is 60-70 tons/hour;
(3) and increasing the feeding amount of the receiving hopper of the ring cooling machine, so that the temperature of the atmosphere in the receiving hopper of the ring cooling machine is kept at 470-500 ℃, the keeping time is 18h, and the feeding amount of the receiving hopper is 120-130 tons/h.
And (3) when the step (1) and the step (2) are operated, closing the blast cooling fan corresponding to the receiving hopper, and after the step (2) is finished, opening the blast cooling fan corresponding to the receiving hopper.
The material distribution thickness of the ring cooling machine trolley in the steps (1) and (2) is 10-30mm, and the running speed of the ring cooling machine trolley is 1.9 revolutions per hour.
After the process (24 h) is adopted, a production mode that the other four billiard ball tables are all opened within 6 hours is adopted, and the production method specifically comprises the following steps: secondly, opening a No. 3 ball tray in 25-26 hours, wherein the feeding amount of a receiving hopper reaches 200 and 220 tons/hour; thirdly, opening a 4 th ball tray at 27 th hour, wherein the feeding amount of a receiving hopper reaches 280 plus 300 tons/hour; fourthly, opening a 5 th ball tray at 28 h, and enabling the feeding quantity of a receiving hopper to be 360-380 tons/h; and fifthly, in 29 th hour, all the six billiard disks are opened, and the feeding amount of the receiving hopper reaches 430 and 450 tons/hour.
Example 2
A method for preventing the bursting of refractory materials of a receiving hopper of a circular cooler comprises the following steps:
(1) the refractory material poured on the four-side steel armor of the receiving hopper of the ring cooling machine comprises aggregate and water, the moisture content of the refractory material is 8-12wt% of the refractory material aggregate, and the chemical component of the refractory material aggregate mainly comprises Al2O3、SiO2Composition of Al2O3 :65-72 wt%、SiO224-30 wt%, the rest is other metal oxide.
(2) The feeding amount of the receiving hopper of the annular cooler is adjusted, so that the temperature of the atmosphere in the receiving hopper of the annular cooler is kept at 250-320 ℃, and the holding time is 7 h; the feeding amount of the receiving hopper is 60-70 tons/hour;
(3) and increasing the feeding amount of the receiving hopper of the ring cooling machine, so that the temperature of the atmosphere in the receiving hopper of the ring cooling machine is kept at 490-520 ℃, the keeping time is 17h, and the feeding amount of the receiving hopper is 140 tons/h.
And (3) when the step (1) and the step (2) are operated, closing the blast cooling fan corresponding to the receiving hopper, and after the step (2) is finished, opening the blast cooling fan corresponding to the receiving hopper.
The material distribution thickness of the ring cooling machine trolley in the steps (1) and (2) is 10-30mm, and the running speed of the ring cooling machine trolley is 1.8 revolutions per hour.
After the process (24 h) is adopted, a production mode that the other four billiard ball tables are all opened within 6 hours is adopted, and the production method specifically comprises the following steps: secondly, opening a No. 3 ball tray in 25-26 hours, wherein the feeding amount of a receiving hopper reaches 200 and 220 tons/hour; thirdly, opening a 4 th ball tray at 27 th hour, wherein the feeding amount of a receiving hopper reaches 280 plus 300 tons/hour; fourthly, opening a 5 th ball tray at 28 h, and enabling the feeding quantity of a receiving hopper to be 360-380 tons/h; and fifthly, in 29 th hour, all the six billiard disks are opened, and the feeding amount of the receiving hopper reaches 430 and 450 tons/hour.
Example 3
A method for preventing the bursting of refractory materials of a receiving hopper of a circular cooler comprises the following steps:
(1) the refractory material poured on the four-side steel armor of the receiving hopper of the ring cooling machine comprises aggregate and water, the moisture content of the refractory material is 8-12wt% of the refractory material aggregate, and the chemical component of the refractory material aggregate mainly comprises Al2O3、SiO2Composition of Al2O3 :65-72 wt%、SiO224-30 wt%, the rest is other metal oxide.
(2) The feeding amount of the receiving hopper of the annular cooler is adjusted, so that the temperature of the atmosphere in the receiving hopper of the annular cooler is kept at 250-320 ℃ for 8 h; the feeding amount of the receiving hopper is 60-70 tons/hour;
(3) and increasing the feeding amount of the receiving hopper of the ring cooling machine, so that the temperature of the atmosphere in the receiving hopper of the ring cooling machine is kept at 530 ℃, the keeping time is 16h, and the feeding amount of the receiving hopper is 150 tons/h.
And (3) when the step (1) and the step (2) are operated, closing the blast cooling fan corresponding to the receiving hopper, and after the step (2) is finished, opening the blast cooling fan corresponding to the receiving hopper.
The material distribution thickness of the ring cooling machine trolley in the steps (1) and (2) is 10-30mm, and the running speed of the ring cooling machine trolley is 1.7 revolutions per hour.
After the process (24 h) is adopted, a production mode that the other four billiard ball tables are all opened within 6 hours is adopted, and the production method specifically comprises the following steps: secondly, opening a No. 3 ball tray in 25-26 hours, wherein the feeding amount of a receiving hopper reaches 200 and 220 tons/hour; thirdly, opening a 4 th ball tray at 27 th hour, wherein the feeding amount of a receiving hopper reaches 280 plus 300 tons/hour; fourthly, opening a 5 th ball tray at 28 h, and enabling the feeding quantity of a receiving hopper to be 360-380 tons/h; and fifthly, in 29 th hour, all the six billiard disks are opened, and the feeding amount of the receiving hopper reaches 430 and 450 tons/hour.
The invention discloses a method for preventing bursting of refractory materials of a receiving hopper of a ring cooling machine, which adopts a hot ball baking method of a thin material layer and a fast ring speed of the ring cooling machine, namely a control method for reasonably controlling the temperature of a first cold section of the ring cooling machine. The new replacement refractory in the receiving hopper requires drying and removal of molecular water and crystal water at relatively low temperatures.
According to the characteristics of the refractory material, the corresponding temperatures are respectively 250-320 ℃ and 470-530 ℃. Although the receiving hopper of the circular cooler has no temperature measuring facility, the temperature of the first cooling section of the circular cooler can directly reflect the specific condition of the actual temperature in the receiving hopper. Therefore, the reasonable control of the temperature of a cold section is directly related to the drying effect of the refractory material of the receiving hopper, and is also a control means for avoiding bursting.
In order to meet the requirement of temperature control in two stages of removing refractory molecular water and crystal water, a fast ring speed control technology is adopted, and the temperature of a first cooling section is kept at 320 ℃ for 6-8h by dynamically adjusting the running speed of a ring cooling machine, so that the molecular water is removed; the rest time (16-18 h) is kept at 470-530 ℃ as much as possible to remove the crystal water, and finally the moisture of the refractory material is uniformly and completely removed.
The invention realizes the drying of the refractory material by the following three means:
firstly, the quantity of hot balls entering the receiving hopper of the annular cooler in the rotary kiln is reasonably controlled, so that the heat not only meets the requirement of drying moisture of refractory materials, but also avoids the bursting of the refractory materials caused by high temperature. The specific method comprises the following steps: after the receiving hopper of the ring cooling machine is overhauled and started up every time, a production mode of two constant ball disks is adopted (6 disks are opened before a method for preventing the bursting of the refractory material of the receiving hopper of the ring cooling machine is not developed), and the operation is kept for 24 hours.
Secondly, the invention adopts a control method of the thin material layer of the circular cooler. In order to avoid the problem that the receiving hopper of the ring cooling machine cracks in the refractory drying process due to heat concentration of the receiving hopper, a control method that the receiving hopper is not piled and the thin material layer of the trolley of the ring cooling machine is distributed is adopted, so that the hot balls are prevented from directly contacting the refractory material of the receiving hopper of the ring cooling machine as far as possible, and the radiation heat of the hot balls is used for drying the moisture of the refractory material.
Thirdly, the invention adopts a control method that the circular cooler No. 1 blast cooler does not operate. The pellet cools in the cold machine of ring carries out the mode of cooling for blowing the direct cooling in the platform truck lower part, and the cold machine of ring receives the hopper and is in the cooling control scope of 1# air-blower, like this under the condition that the air-blower was opened, especially along with the increase of cooling air volume, red-hot pellet can cool off fast, must make the heat that produces also corresponding improvement among the cooling process to cause the problem that the resistant material of receiving the heat fill appears bursting. Therefore, in order to avoid the problem of heat concentration of the receiving hopper caused by cooling, a control method that the circular cooler No. 1 blast cooling fan does not operate is adopted, and the hot balls in the receiving hopper of the circular cooler are brought into other areas without refractory material replacement for cooling, so that the heat of the receiving hopper is effectively controlled.
The invention thoroughly solves the problem of bursting of the refractory material of the receiving hopper of the ring cooling machine, and prolongs the service life of the refractory material at the part to more than 1 year. The time of at least 5 days is needed for overhauling and replacing the refractory material of the receiving hopper of the ring cooling machine every time, the service life is prolonged to 1 year from 4 months, the overhauling time can be reduced by 10 days every year, and the total of the two production lines is 20 days. According to the measurement of 1 ten thousand tons of daily output, 20 ten thousand tons of pellet ore can be produced each year, and the economic benefit is obvious; meanwhile, the refractory material and the labor cost can be effectively saved.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A method for preventing the burst of refractory material of a receiving hopper of a ring cooling machine is characterized in that after the receiving hopper of the ring cooling machine is overhauled and started up each time, a production mode of two constant ball disks is adopted, and the operation is kept for 24 hours;
adopting a control method of a thin material layer of the circular cooler, adopting a control method of no material piling of a receiving hopper and thin material layer distribution of a trolley of the circular cooler;
the hot balls in the receiving hopper of the ring cooling machine are brought into other areas without refractory material replacement for cooling, so that the heat of the receiving hopper is effectively controlled;
the method specifically comprises the following steps:
(1) closing the blast cooling fan corresponding to the receiving hopper, and pouring a refractory material containing 8-12wt% of water on the four-side steel shell of the receiving hopper of the annular cooler, wherein the thickness of the refractory material is 240-;
(2) keeping a blast cooling fan corresponding to the receiving hopper closed, and keeping the temperature of the atmosphere in the receiving hopper of the annular cooler at 250-320 ℃ for 6-8h by adjusting the feeding amount of the receiving hopper of the annular cooler;
(3) and starting a blast cooling fan corresponding to the receiving hopper, and increasing the feeding amount of the receiving hopper of the ring cooling machine, so that the temperature of the atmosphere in the receiving hopper of the ring cooling machine is kept at 470-530 ℃ for 16-18 h.
2. The method for preventing the bursting of the refractory of the receiving hopper of the ring cooling machine as claimed in claim 1, wherein the feeding amount of the receiving hopper in the step (1) is 60 to 70 tons/hour.
3. The method for preventing the bursting of the refractory of the receiving hopper of the annular cooler as set forth in claim 1 or 2, wherein the feeding amount of the receiving hopper in the step (2) is 120-150 tons/hr.
4. The method for preventing the bursting of the refractory of the receiving hopper of the ring cooling machine as claimed in claim 1 or 2, wherein the cloth thickness of the ring cooling machine trolley in the steps (1) and (2) is 10-30mm, and the running speed of the ring cooling machine trolley is 1.7-1.9 r/h.
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| CN2893609Y (en) * | 2006-04-07 | 2007-04-25 | 广西柳州钢铁(集团)公司 | Rotary kiln bottom ring cooling machine receiving device |
| CN201126313Y (en) * | 2007-11-12 | 2008-10-01 | 攀钢集团成都钢铁有限责任公司 | Air guide wall for pellet ore vetical furnace |
| CN101975516A (en) * | 2010-12-01 | 2011-02-16 | 中冶北方工程技术有限公司 | Safety chute for feed hopper of pellet forced draft circular cooler |
| CN105571325A (en) * | 2015-12-24 | 2016-05-11 | 四川德胜集团钒钛有限公司 | Fireproof device of ring cooling machine receiving hopper |
| CN209541427U (en) * | 2019-02-20 | 2019-10-25 | 河南陇耐耐火材料有限公司 | For repairing the loose refractory repair apparatus of refractory brick |
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2019
- 2019-12-13 CN CN201911278957.1A patent/CN110926221B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2893609Y (en) * | 2006-04-07 | 2007-04-25 | 广西柳州钢铁(集团)公司 | Rotary kiln bottom ring cooling machine receiving device |
| CN201126313Y (en) * | 2007-11-12 | 2008-10-01 | 攀钢集团成都钢铁有限责任公司 | Air guide wall for pellet ore vetical furnace |
| CN101975516A (en) * | 2010-12-01 | 2011-02-16 | 中冶北方工程技术有限公司 | Safety chute for feed hopper of pellet forced draft circular cooler |
| CN105571325A (en) * | 2015-12-24 | 2016-05-11 | 四川德胜集团钒钛有限公司 | Fireproof device of ring cooling machine receiving hopper |
| CN209541427U (en) * | 2019-02-20 | 2019-10-25 | 河南陇耐耐火材料有限公司 | For repairing the loose refractory repair apparatus of refractory brick |
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