CN117773132A - Granulating method and granulating device - Google Patents
Granulating method and granulating device Download PDFInfo
- Publication number
- CN117773132A CN117773132A CN202311817329.2A CN202311817329A CN117773132A CN 117773132 A CN117773132 A CN 117773132A CN 202311817329 A CN202311817329 A CN 202311817329A CN 117773132 A CN117773132 A CN 117773132A
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- China
- Prior art keywords
- granulating
- gas
- cooling water
- water
- chute
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Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 60
- 239000000498 cooling water Substances 0.000 claims abstract description 56
- 239000007921 spray Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims description 19
- 238000005469 granulation Methods 0.000 claims description 12
- 230000003179 granulation Effects 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000003595 mist Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 13
- 239000000155 melt Substances 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011361 granulated particle Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- HYXXTUOWDIJLPS-UHFFFAOYSA-N copper;sulfane Chemical compound S.[Cu+2] HYXXTUOWDIJLPS-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000007909 melt granulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- DYJOUBLHPAIUEU-UHFFFAOYSA-N nickel(2+) sulfane Chemical compound S.[Ni+2] DYJOUBLHPAIUEU-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Abstract
The invention discloses a granulating method, wherein high-temperature melt flows out of a chute and enters a granulating chamber, gas sprayed from the lower part of the chute blows the high-temperature melt away to form molten drops, the molten drops move rightwards under the action of the gas, cooling water sprayed by a spray pipe arranged at the upper right part of the granulating chamber forms a water curtain to meet the molten drops, the molten drops are solidified into particles under the action of the cooling water, the cooling water forms water vapor, the particles fall into the bottom of the granulating chamber, and the water vapor passes through a molten drop area to cool the molten drops and then enters a flue gas outlet to be discharged out of the granulating chamber. Meanwhile, the invention also discloses a granulating device. The invention firstly adopts gas to blow off the high-temperature melt, and the spray of the cooling water arranged at the rear section of the granulating chamber cools the melt drops, so that the quantity of water at the front end of the granulating chamber is reduced, the water is prevented from entering the chute from the chute inlet, and the explosion can be avoided.
Description
Technical Field
The invention relates to the technical field of high-temperature melt granulation, in particular to a granulating method and a granulating device.
Background
In the nonferrous metal smelting industry, more high-temperature melt needs to be changed into particulate matters, such as various sulfonium including copper sulfonium, nickel sulfonium and the like, and smelting slag generated in the smelting process, such as smelting slag and blowing slag generated in copper-nickel smelting, some intermediate materials and the like, needs to be changed into particulate matters. To achieve the desired conversion of the high temperature melt into granules, cooling-crushing, or even grinding, is initially employed to meet the smaller particle size requirements. High pressure water injection has been developed to blow the high temperature melt stream to form particulates, but for some sulfur-containing high temperature melts, chemical reactions occur during the high pressure water injection process, causing explosions, equipment damage in severe cases, and personnel injury.
In order to prevent or reduce the possibility of explosion, the patent CN101386917B 'noiseless matte granulating technology' and the patent CN101660012B 'a metallurgical slag anhydrous granulating technology' adopt the advantages that firstly, high-pressure gas is used for scattering high-temperature melt, then high-pressure water is sprayed, the scattered materials are cooled, and finally particles are formed, so that the granulating process is finished, the granulating effect of the 2 patents is good, the explosion in the granulating process is avoided, the water consumption is low, the equipment failure rate is low, the operation rate is high, and the like. Also CN106345370B "granulating device of melt" adopts the mode of composite spray head and water-cooling spray head to complete granulating of high-temperature melt. However, the granulating device is provided with the water cooling spray heads below the chute or at the feed inlet, the water quantity is large, more water drops are formed at the front end under the interaction of high-pressure air and high-pressure water, if the negative pressure in the granulating chamber is small, the water drops are easy to enter a high-temperature melt in the chute, explosion is easy to be caused, and equipment and personnel injury can be caused in severe cases.
Disclosure of Invention
The invention aims to provide a granulating method and a granulating device, which are used for solving the technical problem of explosion caused by water drops entering a high-temperature melt in a chute due to large water quantity.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the high-temperature melt flows out of a chute and enters a granulating chamber, gas sprayed from the lower part of the chute blows the high-temperature melt away to form molten drops, the molten drops move rightwards under the action of the gas, cooling water sprayed by a spray pipe arranged on the upper right part of the granulating chamber forms a water curtain to meet the molten drops, the molten drops are solidified into particles under the action of the cooling water, the cooling water forms water vapor, the particles fall into the bottom of the granulating chamber, and the water vapor passes through a molten drop area to cool the molten drops and then enters a smoke outlet to be discharged out of the granulating chamber.
Further, the gas is any one of high-pressure air, high-pressure nitrogen and high-pressure water mist, the pressure of the gas is 0.4-0.8 MPa, and the flow is 2000-4500 m 3 。
Further, the gas is sprayed to the right upper side, and the included angle between the gas spraying direction and the horizontal is-5 degrees to 25 degrees.
Further, the cooling water is sprayed to the left and the lower sides, and the included angle between the spraying direction of the cooling water and the vertical direction is 0-32 degrees.
Further, the pressure of the cooling water is 0.5-0.8 MPa, and the flow is 20-70 m 3 。
The invention also provides a granulating device which comprises a chute, a granulator and a granulating chamber, wherein the granulator is arranged below the chute, the top of the front end of the granulating chamber is provided with a flue gas outlet, the granulator is provided with a gas inlet and a gas spray head, the rear section of the granulating chamber is provided with a spray pipe, the spray pipe is perpendicular to the left and right box body walls of the granulating chamber body, and the spray pipe is provided with a cooling water spray head.
Further, the granulator further comprises a water inlet, and the included angle between the jet direction of the gas nozzle and the horizontal plane is-5-25 degrees.
Furthermore, the cooling water spray header consists of a plurality of spray heads or is a thin seam along the length direction of the spray pipe.
Further, the bottom surface of the chute outlet is a plane.
Furthermore, the left end and the right end of the spray pipe are connected with a high-pressure water supply pipe, and the included angle between the spray angle of the cooling water spray header and the vertical direction is 0-28 degrees.
Compared with the prior art, the invention firstly adopts gas to blow away the high-temperature melt, and the spray of the cooling water arranged at the rear section of the granulating chamber cools the melt drops, so that the quantity of water at the front end of the granulating chamber is reduced, the water is prevented from entering the chute from the chute inlet, and the explosion can be avoided. In addition, the high-melting body is blown away into the granulating chamber by utilizing the gas sprayed by the granulator arranged below the chute, so that the formed molten drops move rightwards, meanwhile, the spray pipe arranged at the rear part of the granulating chamber sprays high-pressure water to the molten drops moving, the molten drops meet cooling water, the cooling water cools the molten drops into solid particles, and the molten drops are partially gasified into water vapor. The smoke outlet arranged on the granulating chamber is driven by the fan to suck smoke, vapor and the like in the granulating chamber, the gasified vapor passes through the droplet belt to enter the smoke outlet under the action of suction, and the vapor cools the droplet to reduce the droplet temperature, so that the droplet is changed into a semi-droplet or a droplet, and the high-temperature droplet and the cooling water phase are prevented from being subjected to chemical reaction to generate explosion.
Drawings
FIG. 1 is a schematic view of a granulating apparatus;
FIG. 2 is a top view of the granulating apparatus;
FIG. 3 is a schematic view of chute and granulator positions;
FIG. 4 is a schematic view of a shower pipe;
fig. 5 is another schematic view of a shower pipe.
In the figure: 100. chute 110, bottom surface 200, granulator 300, granulating chamber 210, plenum 220, gas inlet 230, water inlet 240, gas spray head 310, granulating chamber body 320, flue gas outlet 330, spray pipe 331, cooling water spray head.
Description of the embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention provides a granulating method, high-temperature melt flows out of a chute and enters a granulating chamber 300, high-pressure gas is sprayed out from the lower part of the chute to blow the high-temperature melt off to form molten drops, the molten drops move rightwards under the action of the high-pressure gas, cooling water sprayed by a spray pipe 330 arranged at the upper right part in the granulating chamber 300 forms a water curtain to meet the molten drops, the molten drops are solidified into particles under the action of the cooling water, all or part of the cooling water forms water vapor, the particles fall into the bottom of the granulating chamber 300, and the water vapor passes through a molten drop area to cool the molten drops and then enters a flue gas outlet to be discharged out of the granulating chamber 300.
Wherein the gas is generally any one of high-pressure air, high-pressure nitrogen and high-pressure water mist, the pressure and flow of the gas are regulated according to the temperature and flow of the high-temperature melt, and the pressure of the gas is generally 0.4-0.8 MPa, and the flow is 2000-4500 m 3 。
Meanwhile, the granulator 200 can be adjusted to adjust the direction of gas spraying to the right and the upper direction, and the included angle between the gas spraying direction and the horizontal direction is generally-5 degrees to 25 degrees. The greater the angle, the closer the horizontal distance the droplet is ejected, but the greater the height of the granulating chamber 300 is required for the same high temperature melt flow, gas flow, and pressure; in addition, the larger the included angle, the smaller the formed molten drop particles, namely the smaller the particle size of the cooled particles, so that the dust content of the smoke dust is increased.
The cooling water sprayed by the spray pipe 330 is used for cooling the molten drops, so that the position of the spray pipe 330 and the setting of the spraying angle of the cooling water need to be considered, the shorter the spray pipe 330 is, the shorter the granulating chamber 300 can be, the larger the particles of the granulated particles are, and the dust content of the flue gas is high; the more recently, the granulating chamber 300 is required to be longer, the smaller the particulate matter after granulation, and the dust content of the flue gas is reduced. The included angle between the cooling water spraying direction and the vertical direction is generally 0-32 degrees. In addition, the pressure and flow rate of the cooling water are also required to be adjusted according to the flow rate of the high-temperature melt and the injection angle of the cooling water, the pressure of the cooling water is generally 0.5-0.8 MPa, and the flow rate is generally 20-70 m 3 。
Examples
The high temperature melt flows out of the chute 100, the flow rate of the high temperature melt is 50t/h, the gas sprayed by the granulator 300 blows off the high temperature melt, the gas spraying angle is 5 degrees, the gas pressure is 0.6MPa, and the flow rate of the gas is 3200m 3 . The molten drops are cooled by cooling water sprayed by a spray pipe, the spraying angle of the cooling water is 5 degrees, the pressure of the cooling water is 0.6MPa, and the flow is 40m 3 . Granulation processNo explosion is generated, and the dust content of the flue gas is 50mg/m 3 The particle size composition of the particulate matter is: +10mm to +5mm < 3%, +5mm to +0.5mm > 95%, -0.5mm < 2%.
Examples
The high temperature melt flows out of the chute 100, the flow rate of the high temperature melt is 30t/h, the gas sprayed by the granulator 300 blows off the high temperature melt, the gas spraying angle is-5 degrees, the gas pressure is 0.7MPa, and the gas flow rate is 2200m 3 . The molten drops are cooled by cooling water sprayed by a spray pipe, the spraying angle of the cooling water is 30 degrees, the pressure of the cooling water is 0.8MPa, and the flow is 20m 3 . No explosion is generated in the granulating process, and the dust content of the flue gas is 20mg/m 3 The particle size composition of the particulate matter is: +10mm < 2%, +10mm to +5mm < 5%, +5mm to +0.5mm > 92%, 0.5mm < 1%.
Examples
The high-temperature melt flows out of the chute 100, the flow rate of the high-temperature melt is 110t/h, the high-temperature melt is blown off by the gas sprayed by the granulator 300, the gas spraying angle is 20 degrees, the gas pressure is 0.5MPa, and the gas flow rate is 4000m 3 . The molten drops are cooled by cooling water sprayed by a spray pipe, the spraying angle of the cooling water is 15 degrees, the pressure of the cooling water is 0.5MPa, and the flow is 65m 3 . No explosion is generated in the granulating process, and the dust content of the flue gas is 65mg/m 3 The particle size composition of the particulate matter is: +10mm to +5mm < 4%, +5mm to +0.5mm > 93%, -0.5mm < 2%.
As shown in fig. 1 and 2, the present invention also provides a granulating apparatus comprising a chute 100, a granulator 200 and a granulating chamber 300, wherein the granulator 200 is disposed under the chute 100, a flue gas outlet 320 is disposed at the top of the front end of the granulating chamber 300, a gas inlet 220 and a gas spray head 240 are disposed on the granulator 200, a spray pipe 330 is disposed at the rear section of the granulating chamber 300, the spray pipe 330 is perpendicular to the left and right walls of the granulating chamber body 310, and a cooling water spray head 331 is disposed on the spray pipe 330.
As shown in fig. 3, the gas may be high-pressure mist during the granulation of a part of the high-temperature melt, so that the granulator 200 is provided with a water inlet 230, a gas inlet 220, and a gas nozzle 240, water is introduced from the water inlet 230, gas is introduced from the gas inlet 220, and mixed in the air chamber 210 and then sprayed out through the gas nozzle 240. In addition, the granulating effect can be influenced by the angle between the spraying direction of the gas spray head and the horizontal angle, and the angle between the spraying direction of the gas spray head and the horizontal plane is-5-25 degrees. The greater the angle, the closer the horizontal distance the droplet is ejected, but the greater the height of the granulating chamber 300 is required for the same high temperature melt flow, gas flow, and pressure; in addition, the larger the included angle, the smaller the formed molten drop particles, namely the smaller the particle size of the cooled particles, so that the dust content of the smoke dust is increased.
As shown in fig. 4 and 5, in order to enhance the cooling water spray effect, the cooling water spray header 331 on the spray pipe 330 is composed of a plurality of spray heads or is a thin slit along the length direction of the spray pipe.
In addition, in order to ensure the effect of cooling water spraying, the left end and the right end of the spray pipe are connected with a high-pressure water supply pipe. The cooling water sprayed by the spray pipe 330 is used for cooling the molten drops, so that the position of the spray pipe 330 and the setting of the spraying angle of the cooling water need to be considered, the shorter the spray pipe 330 is, the shorter the granulating chamber 300 can be, the larger the particles of the granulated particles are, and the dust content of the flue gas is high; the more recently, the granulating chamber 300 is required to be longer, the smaller the particulate matter after granulation, and the dust content of the flue gas is reduced. The included angle between the cooling water spraying direction and the vertical direction is generally 0-32 degrees.
As shown in fig. 3, the gas nozzle 240 on the granulator 200 is generally horizontally arranged, so that the bottom surface 110 of the outlet of the chute 100 is arranged to be a plane to ensure that the high-temperature melt forms uniform fluid, and the granulating effect is good under the same gas spraying.
Compared with the prior art, the invention has the advantages that the cooling water is sprayed and placed at the rear section of the granulating chamber, so that water is prevented from entering the chute from the chute inlet, and explosion can be avoided. In addition, the high-melting body is blown away into the granulating chamber by utilizing the gas sprayed by the granulator arranged below the chute, so that the formed molten drops move rightwards, meanwhile, the spray pipe arranged at the rear part of the granulating chamber sprays high-pressure water to the molten drops moving, the molten drops meet cooling water, the cooling water cools the molten drops into solid particles, and the molten drops are partially gasified into water vapor. The smoke outlet arranged on the granulating chamber is driven by the fan to suck smoke, vapor and the like in the granulating chamber, the gasified vapor passes through the droplet belt to enter the smoke outlet under the action of suction, and the vapor cools the droplet to reduce the droplet temperature, so that the droplet is changed into a semi-droplet or a droplet, and the high-temperature droplet and the cooling water phase are prevented from being subjected to chemical reaction to generate explosion.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (10)
1. The granulating method is characterized in that high-temperature melt flows out of a chute and enters a granulating chamber, gas sprayed out of the lower part of the chute blows the high-temperature melt away to form molten drops, the molten drops move rightwards under the action of the gas, cooling water sprayed by a spray pipe arranged on the upper right of the granulating chamber forms a water curtain to meet the molten drops, the molten drops are solidified into particles under the action of the cooling water, the cooling water forms water vapor, the particles fall into the bottom of the granulating chamber, and the water vapor passes through a molten drop area to cool the molten drops and then enters a smoke outlet to be discharged out of the granulating chamber.
2. The granulation method according to claim 1, wherein the gas is any one of high-pressure air, high-pressure nitrogen and high-pressure water mist, the pressure of the gas is 0.4 to 0.8MPa, and the flow rate is 2000 to 4500m 3 。
3. The granulation method according to claim 1, wherein the gas is ejected upward and rightward, and the gas ejection direction forms an angle of-5 ° to 25 ° with the horizontal.
4. The granulation method according to claim 1, wherein the cooling water is sprayed downward and leftward, and the spraying direction of the cooling water is at an angle of 0 to 32 ° to the vertical.
5. The granulation method according to claim 1, characterized in that the pressure of the cooling water is 0.5 to 0.8MPa and the flow rate is 20 to 70m 3 。
6. The utility model provides a granulating device, includes chute, granulator and granulation room, the granulator sets up the chute below, the front end top of granulation room sets up the flue gas export, its characterized in that, set up gas inlet and gas shower nozzle on the granulator the back end of granulation room sets up the shower, the shower is perpendicular with the body wall about the granulation room body, set up the cooling water shower on the shower.
7. The granulating apparatus of claim 6, wherein the granulator further comprises a water inlet, and wherein the gas jet spray direction is at an angle of-5 ° to 25 ° to the horizontal.
8. The granulating apparatus of claim 6, wherein the cooling water shower head is composed of a plurality of shower heads or is a slit along the length direction of the shower pipe.
9. The granulating apparatus of claim 6, wherein the bottom surface of the chute outlet is planar.
10. The granulating apparatus according to claim 6, wherein both the left and right ends of the shower pipe are connected to a high-pressure water supply pipe, and the cooling water shower head has an injection angle of 0 to 28 ° with respect to the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311817329.2A CN117773132A (en) | 2023-12-27 | 2023-12-27 | Granulating method and granulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311817329.2A CN117773132A (en) | 2023-12-27 | 2023-12-27 | Granulating method and granulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117773132A true CN117773132A (en) | 2024-03-29 |
Family
ID=90390365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311817329.2A Pending CN117773132A (en) | 2023-12-27 | 2023-12-27 | Granulating method and granulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117773132A (en) |
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2023
- 2023-12-27 CN CN202311817329.2A patent/CN117773132A/en active Pending
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