CA1229974A - Pneumatic gun for refractory plastic material - Google Patents
Pneumatic gun for refractory plastic materialInfo
- Publication number
- CA1229974A CA1229974A CA000479147A CA479147A CA1229974A CA 1229974 A CA1229974 A CA 1229974A CA 000479147 A CA000479147 A CA 000479147A CA 479147 A CA479147 A CA 479147A CA 1229974 A CA1229974 A CA 1229974A
- Authority
- CA
- Canada
- Prior art keywords
- granulator
- refractory material
- granulated
- gunning
- feeding
- 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
Links
Classifications
-
- 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
- F27D1/1636—Repairing linings by projecting or spraying refractory materials on the lining
- F27D1/1642—Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus
Abstract
ABSTRACT
A pneumatic gunning mechanism for gunning granulated refractory material having a granulator which has an input for receiving large slabs of plastic refractory material and a further input for receiving granulated refractory material such that rebound material can be blended with fresh plastic refractory material during granulating prior to gunning. The pneumatic gun assembly includes a granulator which is disposed directly above the inlet to the pneumatic gun such that granulated particles of refractory material which are discharged from the granulator fall directly into the input of the pneumatic gun in a loose granular form and are pneumatically discharged therefrom in loose granular form.
A pneumatic gunning mechanism for gunning granulated refractory material having a granulator which has an input for receiving large slabs of plastic refractory material and a further input for receiving granulated refractory material such that rebound material can be blended with fresh plastic refractory material during granulating prior to gunning. The pneumatic gun assembly includes a granulator which is disposed directly above the inlet to the pneumatic gun such that granulated particles of refractory material which are discharged from the granulator fall directly into the input of the pneumatic gun in a loose granular form and are pneumatically discharged therefrom in loose granular form.
Description
~22997~
This invention relates to the pneumatic gunning of plastic refractory materials. In particular this invention relates to improvements in a pneumatic gunning assembly for the gunning of granulated plastic refractory material.
ire Art The pneumatic gunning of granulated plastic refractory material is an efficient method of forming a refractory lining on the walls of a furnace or the like. The lining can be applied by a pneumatic gunning process in a much shorter time period than that required for other methods of forming a refractory lining.
One of the drawbacks of the pneumatic gunning process is, however, that a substantial proportion of the granular particles of refractory material which are sprayed onto the wall will rebound from the wall and will not adhere to the wall. It is generally accepted that the amount of plastic refractory material which will rebound in this manner is about 20% of the total weight of refractory material which is gunned. The efficiency of the gunning process has, however, been such that this loss has been more than compensated for by the labor saving of the gunning process, I have found that the losses due to rebound can be overcome by regranulating the rebound and blending the rebound with freshly granulated refractory plastic material. This serves to substantially reduce the losses due to rebound.
A further problem which has been experienced in attempting to pneumatically gun granulated plastic refractory material is that of preventing the granulated material reforming into large clumps after I.
~Z99~
it has been granulated and before it is gunned. I have found that this problem can be substantially eliminated by arranging the outlet of the granulator so that it is directly above the inlet of the pneumatic gunning device.
Summary of Invention According to one aspect of the present invention, there is provided in a pneumatic gunning mechanism for gunning granulated refractory material having a granulator which has an input for receiving plastic refractory and an output for discharging granulated plastic refractory into a pneumatic gun, the improvement of a feeding hopper having first and second feeding passages opening there through which each communicate with the input of said granulator, said first feeding passage being proportioned to permit a slab of plastic refractory material to pass there through, said second feeding passage serving to permit lumps of plastic refractory material to be admitted to the granulator simultaneously with the slab of plastic material so as to be mixed one with the other in the granulator.
According to another aspect of the present invention, there is provided a pneumatic gunning assembly for gunning granulated plastic refractory comprising a feeding hopper having at least one feeding passage, a granulator having a granulator chamber which has an inlet and an outlet a granulator mechanism mounted in said granulator chamber, the output end of each through passage of the feeding hopper communicating with the inlet of the granulated chamber, a pneumatic gun having an input for receiving granulated plastic refractory material and a discharge for discharging airborne particles of ~Z2919~
granulated plastic material, said pneumatic gun being located below said granulator with the input of the pneumatic gun disposed directly below the outlet of the granulator so that granulated particles of refractory material which are discharged from the granulator fall directly into the pneumatic gun in a loose granular form and are pneumatically discharged therefrom before they have an opportunity to reform into a large mass of plastic material.
The invention will be more clearly understood after reference to the following detailed specification read in conjunction with the drawings wherein:
Figure l is a pictorial front view of a pneumatic gunning mechanism constructed in accordance with an embodiment of the present invention;
Figure 2 is a diagram illustrating the various conduits of the pneumatic gun;
Figure 3 is a partially sectioned pictorial view of the feeding hopper and granulator and the input to the pneumatic gun;
Figure 4 is a sectional side view taken along the line 4-4 of Figure 3;
Figure 5 is a partially sectioned pictorial view of a pneumatic gun constructed in accordance with an embodiment of the present invention; and Figure 6 is a sectional side view taken along the line 6-6 of Figure 5.
With reference to Figure 1 of the drawings, the reference numeral 10 refers generally to a pneumatic gunning mechanism constructed in accordance with an embodiment of the present invention.
97~L
The mechanism 10 comprises a frame 12 which is mounted on a wheeled platform 14. A pneumatic gun 16 is mounted on the platform 14 and a granulator 18 is mounted on beams 20 so as to be disposed directly above the pneumatic gun 16. A feeding hopper 22 is mounted directly above the granulator 18. The granulator 18 is powered by an electric motor 24 which has a speed control handle 26 which may be adjusted to control the output speed from the motor. The granulator 18 is driven through a gearbox 28 in a conventional manner.
Air is applied under pressure to the pneumatic gun 16 through a conduit 30 which is adapted to releasable connected to a conduit 32 (~ig.2). The conduit 32 communicates with an air filter 34 which has an output which is connected to an emergency shut-off valve 36. The shut-off valve 36 is connected by conduits 38 and 40 to a T-joint 42.
A branch line conduit 44 extends from one end of the T-joint 42 and is connected to a shut-off valve 46 which may be used to provide a connection for secondary air supply such as a cleaning hose or the like. The other branch of the T-joint 42 is connected to a pressure control valve 48 which is connected to a second shut-off valve 50. A
pressure gauge 52 is connected to the shut-off valve 50 and a conduit 54 is connected to the pressure gauge 52. The conduit 54 is connected to the input line 56 of the pneumatic gun 16.
With reference to Figures 3 and 4 of the drawings, it will be seen that the feeding hopper 22 has a first feeding passage 58 and a second feeding passage 60, each of which open there through. The first feeding passage 58 has an input end 62 and an output end 64 and the second feeding passage 60 has an input end 66 and an output end 68.
17~
The first feeding passage 62 is proportioned to receive a slab or block of plastic refractory material 70 so as to permit it to pass directly there through. Plastic refractory material is generally packaged in slabs or blocks weighing 2 kg., and measuring approximately 9 X 6 X 9 inches to 9 X 6 X 13 inches and the first feeding passage 58 is proportioned to receive these slabs or blocks in a free-fitting relationship which will permit the blocks to pass there through under their own weight so that it is merely necessary to load successive blocks into the first passage to ensure that it will pass there through.
The second through passage 60 has a screen 72 located at its input end 66. The screen 72 has openings 74 formed therein which are proportioned to permit rebound particles of granular plastic refractory material to pass there through which are of a size of substantially equal to that of the granulated material at the output of the granulator. Preferably the passages which are formed in the screen 72 measure no more than 7/8" in diameter.
The second feeding passage 60 has an outer side wall 76 which is angularly inclined downwardly and inwardly toward the divider wall 78. An inner side wall 80 cooperates with a flange 82 to form a narrow passage 84. A metering device generally identified by the reference numeral 86 is mounted for rotation directly below the narrow passage 84. The metering device 86 comprises a rotor 88 which has a central shaft 90 from which a plurality of blades 92 radiate, Discs 94 are located at opposite ends of the shaft 90. Pockets 96 are located between the blades 92 and by rotating the rotor 88 about the shaft 90, successive pockets 96 are exposed to the material passing through the second feeding passage 60. A sprocket 98 (Fugue) is mounted on the end of the shaft 90 and is connected by means of a :' zz997~L
chain 100 to a sprocket 102. The sprocket 102 is mounted on the shaft 104 of the granulator 18, The shaft 104 and a second shaft 106 extend transversely of the granulator 18 and have granulator blades 108 mounted thereon.
Fingers 110 are mounted on opposite sides of the granulator 18 and I
project between adjacent blades 108. The shaft 104 is driven by the motor 24 (Foggily) through the gearbox 28. Rotation of the shaft 104 causes rotation of the shaft 90 and therefore rotation of the metering device 86 to admit the rebound granular particles to the granulator chamber 112. As illustrated in Figure 4 of the drawings, the granulator chamber 112 has an inlet 114 and an outlet 116. The outlet 116 of the granulator 18 is disposed directly above the input shut 118 of the gun 16.
As shown in Figure 5 of the drawings, the shut 118 communicates with the input passage 120 of the pneumatic gun 16. The pneumatic gun 16 is of a substantially conventional construction and includes a rotor 122 Wheaties driven by a motor 124 through a gearbox 126. The rotor 122 has a plurality of pockets 128 formed therein. A
deflector blade 130 is located above a portion of the arc of travel of the rotor immediately ahead of the gunning station which is generally identified by the reference numeral 132. In the gunning station 132, the air input line 56 is arranged to be aligned with one edge of successive pockets 128 and a discharge conduit 134 it located at the opposite edge of the pocket 128. Thus, air which is admitted to the pocket 128 through the input line 56 will drive the granular particles 136 outwardly through the discharge conduit 134 and these particles isles I
will remain separated from one another by being suspended in the air current. The particles 136 can then be gunned directly onto the surface which is to be lined, As indicated in Figure 5 of the drawings, the gun 16 preferably comprises a carriage 138 which is supported by wheels 140 and a front leg 142.
In use, the pneumatic gun 16 is located as shown in Figures 1 and 3 of the drawings with the input shut 118 located directly below the outlet 116 of the granulator so that the granular particles will fall directly from the outlet of the granulator into the input passage 120 of the gun. The rotor 122 is driven continuously during the gunning operation so that as the granular material enters the pockets 128, successive pockets 128 are displaced into the gunning station 132 at which point the granular material is blown out of the pockets 128 and discharged through the discharge conduit 134.
Rebound granular particles which accumulate on the floor of I
the work site can be shoveled into the inlet end of the second feeding passage 60 so as to be sorted by the screen 72 so that the smaller particles are aloud to pass through the second feeding passage 60 to the metering device and are then metered as previously described into the granulating chamber. The slabs or blocks 70 are fed to the granulator through the first feeding passage and are granulated in a conventional manner by the operation of the blades 108. When a substantial amount of oversize rebound particles are accumulated on the screen 72, these oversized particles can be loaded into the granulator between successive slabs passing through the first feeding '7 . .
I
passage 58 and will as a result, be subjected to a further granulating step to reduce them to the required size.
It it essential to ensure that the refractory material is not allowed to reclump into large particles after it is granulated and I
avoid this difficulty by ensuring that the granulated material is discharged directly into the gunning machine in which it is collected in small pockets in quantities which are so small that they are not lively to reform under their own weight into a large clump.
Furthermore, the small pockets serve to ensure that even if the granulated particles are placed in contact with lone another, they will be dispersed when they are contacted by the high pressure air in the gunning station 132.
It will also be apparent that by providing first and second feeding passages, I have made it possible to utilize the rebound granules which are not of an excessive size without subjecting these granules to a regranulating step. Because the rebound material tends to have a somewhat different moisture content than the originally granulated material, I prefer to blend the rebound material with the freshly granulated material and this is achieved by ensuring that both the first and the second feeding passage open into the granulating chamber of the granulator. If I were to merely feed blocks of fresh plastic material followed by a load of rebound through the first feeding passage 21l I would generate a stream of granulated material at the gun output which would vary in characteristics according to whether or not the material which was being gunned was predominantly original gunning material or rebound gunning material.
~2~2~9~
From the foregoing, it will be apparent that the present invention provide a simple and efficient pneumatic gunning mechanism which permits the gunning of rebound material and which permits the gunning of granulated plastic refractory material.
:
I:
I'
This invention relates to the pneumatic gunning of plastic refractory materials. In particular this invention relates to improvements in a pneumatic gunning assembly for the gunning of granulated plastic refractory material.
ire Art The pneumatic gunning of granulated plastic refractory material is an efficient method of forming a refractory lining on the walls of a furnace or the like. The lining can be applied by a pneumatic gunning process in a much shorter time period than that required for other methods of forming a refractory lining.
One of the drawbacks of the pneumatic gunning process is, however, that a substantial proportion of the granular particles of refractory material which are sprayed onto the wall will rebound from the wall and will not adhere to the wall. It is generally accepted that the amount of plastic refractory material which will rebound in this manner is about 20% of the total weight of refractory material which is gunned. The efficiency of the gunning process has, however, been such that this loss has been more than compensated for by the labor saving of the gunning process, I have found that the losses due to rebound can be overcome by regranulating the rebound and blending the rebound with freshly granulated refractory plastic material. This serves to substantially reduce the losses due to rebound.
A further problem which has been experienced in attempting to pneumatically gun granulated plastic refractory material is that of preventing the granulated material reforming into large clumps after I.
~Z99~
it has been granulated and before it is gunned. I have found that this problem can be substantially eliminated by arranging the outlet of the granulator so that it is directly above the inlet of the pneumatic gunning device.
Summary of Invention According to one aspect of the present invention, there is provided in a pneumatic gunning mechanism for gunning granulated refractory material having a granulator which has an input for receiving plastic refractory and an output for discharging granulated plastic refractory into a pneumatic gun, the improvement of a feeding hopper having first and second feeding passages opening there through which each communicate with the input of said granulator, said first feeding passage being proportioned to permit a slab of plastic refractory material to pass there through, said second feeding passage serving to permit lumps of plastic refractory material to be admitted to the granulator simultaneously with the slab of plastic material so as to be mixed one with the other in the granulator.
According to another aspect of the present invention, there is provided a pneumatic gunning assembly for gunning granulated plastic refractory comprising a feeding hopper having at least one feeding passage, a granulator having a granulator chamber which has an inlet and an outlet a granulator mechanism mounted in said granulator chamber, the output end of each through passage of the feeding hopper communicating with the inlet of the granulated chamber, a pneumatic gun having an input for receiving granulated plastic refractory material and a discharge for discharging airborne particles of ~Z2919~
granulated plastic material, said pneumatic gun being located below said granulator with the input of the pneumatic gun disposed directly below the outlet of the granulator so that granulated particles of refractory material which are discharged from the granulator fall directly into the pneumatic gun in a loose granular form and are pneumatically discharged therefrom before they have an opportunity to reform into a large mass of plastic material.
The invention will be more clearly understood after reference to the following detailed specification read in conjunction with the drawings wherein:
Figure l is a pictorial front view of a pneumatic gunning mechanism constructed in accordance with an embodiment of the present invention;
Figure 2 is a diagram illustrating the various conduits of the pneumatic gun;
Figure 3 is a partially sectioned pictorial view of the feeding hopper and granulator and the input to the pneumatic gun;
Figure 4 is a sectional side view taken along the line 4-4 of Figure 3;
Figure 5 is a partially sectioned pictorial view of a pneumatic gun constructed in accordance with an embodiment of the present invention; and Figure 6 is a sectional side view taken along the line 6-6 of Figure 5.
With reference to Figure 1 of the drawings, the reference numeral 10 refers generally to a pneumatic gunning mechanism constructed in accordance with an embodiment of the present invention.
97~L
The mechanism 10 comprises a frame 12 which is mounted on a wheeled platform 14. A pneumatic gun 16 is mounted on the platform 14 and a granulator 18 is mounted on beams 20 so as to be disposed directly above the pneumatic gun 16. A feeding hopper 22 is mounted directly above the granulator 18. The granulator 18 is powered by an electric motor 24 which has a speed control handle 26 which may be adjusted to control the output speed from the motor. The granulator 18 is driven through a gearbox 28 in a conventional manner.
Air is applied under pressure to the pneumatic gun 16 through a conduit 30 which is adapted to releasable connected to a conduit 32 (~ig.2). The conduit 32 communicates with an air filter 34 which has an output which is connected to an emergency shut-off valve 36. The shut-off valve 36 is connected by conduits 38 and 40 to a T-joint 42.
A branch line conduit 44 extends from one end of the T-joint 42 and is connected to a shut-off valve 46 which may be used to provide a connection for secondary air supply such as a cleaning hose or the like. The other branch of the T-joint 42 is connected to a pressure control valve 48 which is connected to a second shut-off valve 50. A
pressure gauge 52 is connected to the shut-off valve 50 and a conduit 54 is connected to the pressure gauge 52. The conduit 54 is connected to the input line 56 of the pneumatic gun 16.
With reference to Figures 3 and 4 of the drawings, it will be seen that the feeding hopper 22 has a first feeding passage 58 and a second feeding passage 60, each of which open there through. The first feeding passage 58 has an input end 62 and an output end 64 and the second feeding passage 60 has an input end 66 and an output end 68.
17~
The first feeding passage 62 is proportioned to receive a slab or block of plastic refractory material 70 so as to permit it to pass directly there through. Plastic refractory material is generally packaged in slabs or blocks weighing 2 kg., and measuring approximately 9 X 6 X 9 inches to 9 X 6 X 13 inches and the first feeding passage 58 is proportioned to receive these slabs or blocks in a free-fitting relationship which will permit the blocks to pass there through under their own weight so that it is merely necessary to load successive blocks into the first passage to ensure that it will pass there through.
The second through passage 60 has a screen 72 located at its input end 66. The screen 72 has openings 74 formed therein which are proportioned to permit rebound particles of granular plastic refractory material to pass there through which are of a size of substantially equal to that of the granulated material at the output of the granulator. Preferably the passages which are formed in the screen 72 measure no more than 7/8" in diameter.
The second feeding passage 60 has an outer side wall 76 which is angularly inclined downwardly and inwardly toward the divider wall 78. An inner side wall 80 cooperates with a flange 82 to form a narrow passage 84. A metering device generally identified by the reference numeral 86 is mounted for rotation directly below the narrow passage 84. The metering device 86 comprises a rotor 88 which has a central shaft 90 from which a plurality of blades 92 radiate, Discs 94 are located at opposite ends of the shaft 90. Pockets 96 are located between the blades 92 and by rotating the rotor 88 about the shaft 90, successive pockets 96 are exposed to the material passing through the second feeding passage 60. A sprocket 98 (Fugue) is mounted on the end of the shaft 90 and is connected by means of a :' zz997~L
chain 100 to a sprocket 102. The sprocket 102 is mounted on the shaft 104 of the granulator 18, The shaft 104 and a second shaft 106 extend transversely of the granulator 18 and have granulator blades 108 mounted thereon.
Fingers 110 are mounted on opposite sides of the granulator 18 and I
project between adjacent blades 108. The shaft 104 is driven by the motor 24 (Foggily) through the gearbox 28. Rotation of the shaft 104 causes rotation of the shaft 90 and therefore rotation of the metering device 86 to admit the rebound granular particles to the granulator chamber 112. As illustrated in Figure 4 of the drawings, the granulator chamber 112 has an inlet 114 and an outlet 116. The outlet 116 of the granulator 18 is disposed directly above the input shut 118 of the gun 16.
As shown in Figure 5 of the drawings, the shut 118 communicates with the input passage 120 of the pneumatic gun 16. The pneumatic gun 16 is of a substantially conventional construction and includes a rotor 122 Wheaties driven by a motor 124 through a gearbox 126. The rotor 122 has a plurality of pockets 128 formed therein. A
deflector blade 130 is located above a portion of the arc of travel of the rotor immediately ahead of the gunning station which is generally identified by the reference numeral 132. In the gunning station 132, the air input line 56 is arranged to be aligned with one edge of successive pockets 128 and a discharge conduit 134 it located at the opposite edge of the pocket 128. Thus, air which is admitted to the pocket 128 through the input line 56 will drive the granular particles 136 outwardly through the discharge conduit 134 and these particles isles I
will remain separated from one another by being suspended in the air current. The particles 136 can then be gunned directly onto the surface which is to be lined, As indicated in Figure 5 of the drawings, the gun 16 preferably comprises a carriage 138 which is supported by wheels 140 and a front leg 142.
In use, the pneumatic gun 16 is located as shown in Figures 1 and 3 of the drawings with the input shut 118 located directly below the outlet 116 of the granulator so that the granular particles will fall directly from the outlet of the granulator into the input passage 120 of the gun. The rotor 122 is driven continuously during the gunning operation so that as the granular material enters the pockets 128, successive pockets 128 are displaced into the gunning station 132 at which point the granular material is blown out of the pockets 128 and discharged through the discharge conduit 134.
Rebound granular particles which accumulate on the floor of I
the work site can be shoveled into the inlet end of the second feeding passage 60 so as to be sorted by the screen 72 so that the smaller particles are aloud to pass through the second feeding passage 60 to the metering device and are then metered as previously described into the granulating chamber. The slabs or blocks 70 are fed to the granulator through the first feeding passage and are granulated in a conventional manner by the operation of the blades 108. When a substantial amount of oversize rebound particles are accumulated on the screen 72, these oversized particles can be loaded into the granulator between successive slabs passing through the first feeding '7 . .
I
passage 58 and will as a result, be subjected to a further granulating step to reduce them to the required size.
It it essential to ensure that the refractory material is not allowed to reclump into large particles after it is granulated and I
avoid this difficulty by ensuring that the granulated material is discharged directly into the gunning machine in which it is collected in small pockets in quantities which are so small that they are not lively to reform under their own weight into a large clump.
Furthermore, the small pockets serve to ensure that even if the granulated particles are placed in contact with lone another, they will be dispersed when they are contacted by the high pressure air in the gunning station 132.
It will also be apparent that by providing first and second feeding passages, I have made it possible to utilize the rebound granules which are not of an excessive size without subjecting these granules to a regranulating step. Because the rebound material tends to have a somewhat different moisture content than the originally granulated material, I prefer to blend the rebound material with the freshly granulated material and this is achieved by ensuring that both the first and the second feeding passage open into the granulating chamber of the granulator. If I were to merely feed blocks of fresh plastic material followed by a load of rebound through the first feeding passage 21l I would generate a stream of granulated material at the gun output which would vary in characteristics according to whether or not the material which was being gunned was predominantly original gunning material or rebound gunning material.
~2~2~9~
From the foregoing, it will be apparent that the present invention provide a simple and efficient pneumatic gunning mechanism which permits the gunning of rebound material and which permits the gunning of granulated plastic refractory material.
:
I:
I'
Claims (6)
1. In a pneumatic gunning mechanism for gunning granulated refractory material having a granulator which is an input for receiving plastic refractory and an output for discharging granulated plastic refractory into a pneumatic gun, the improvement of a feeding hopper having first and second feeding passages opening therethrough which each communicate with the input of said granulator, said first feeding passage being proportioned to permit a block of plastic refractory material to pass therethrough, said second feeding passage serving to permit coarse granular plastic refractory material to be admitted to the granulator simultaneously with the block of plastic material so as to be mixed one with the other in the granulator.
2. The pneumatic gunning mechanism of claim 1 further comprising metering means in said second passage for controlling the rate at which plastic refractory material is discharged from said second passage into said granulator.
3. A pneumatic gunning mechanism as claimed in claim 2 wherein said metering means is drivingly connected to the granulator to control the rate of flow of the plastic refractory through the second feeding passage as a function of the speed of operation of the granulator.
4. A pneumatic gunning mechanism as claimed in claim 3 wherein said second feeding passage has a screen located at its input end which has openings therethrough which prevent the passage of large lumps of plastic refractory material.
5. A pneumatic gunning assembly for gunning granulated plastic refractory comprising:
a) a feeding hopper having at least one feeding passage opening therethrough, b) a granulator having a granulator chamber which has an inlet and an outlet, a granulator mechanism mounted in said granulator chamber, the output end of each through passage of the feeding hopper communicating with the inlet of the granulated chamber, c) a pneumatic gun having an input for receiving granulated plastic refractory material and a discharge for discharging airborne particles of granulated plastic material, said pneumatic gun being located below said granulator with the input of the pneumatic gun disposed directly below the outlet of the granulator so that granulated particles of refractory material which are discharged from the granulator fall directly into the pneumatic gun in a loose granular form and are pneumatically discharged therefrom before they have an opportunity to reform into a large mass of plastic material.
a) a feeding hopper having at least one feeding passage opening therethrough, b) a granulator having a granulator chamber which has an inlet and an outlet, a granulator mechanism mounted in said granulator chamber, the output end of each through passage of the feeding hopper communicating with the inlet of the granulated chamber, c) a pneumatic gun having an input for receiving granulated plastic refractory material and a discharge for discharging airborne particles of granulated plastic material, said pneumatic gun being located below said granulator with the input of the pneumatic gun disposed directly below the outlet of the granulator so that granulated particles of refractory material which are discharged from the granulator fall directly into the pneumatic gun in a loose granular form and are pneumatically discharged therefrom before they have an opportunity to reform into a large mass of plastic material.
6. A pneumatic gun assembly for gunning granulated plastic refractory material comprising:
a) a feeding hopper having first and second feeding passages opening there through, each of said feeding passages having an input end and an output end said feeding passages being proportioned to permit a block of plastic refractory material to pass there through, said second feeding passage being adapted to permit the passage of lumps such as rebound lumps of plastic refractory material therethrough, b) a granulator having a granulator chamber which has an inlet and an outlet, a granulator mechanism mounted in said granulator chamber, said output ends of said first and second feeding passages of said feeding hopper each communicating with said inlet of said granulator chamber whereby plastic refractory material may be fed to said granulator chamber through said first and second or both feeding passages, and c) a pneumatic gun having an input for receiving granulated plastic refractory material and a discharge for discharging airborne particles, said pneumatic gun being located below said granulator with said input of said pneumatic gun disposed directly below said outlet of said granulator so that granulated particles of refractory material which are discharged from the granulator fall directly into the input of the pneumatic gun in a loose granular form and a pneumatically discharged therefrom in loose granular form.
a) a feeding hopper having first and second feeding passages opening there through, each of said feeding passages having an input end and an output end said feeding passages being proportioned to permit a block of plastic refractory material to pass there through, said second feeding passage being adapted to permit the passage of lumps such as rebound lumps of plastic refractory material therethrough, b) a granulator having a granulator chamber which has an inlet and an outlet, a granulator mechanism mounted in said granulator chamber, said output ends of said first and second feeding passages of said feeding hopper each communicating with said inlet of said granulator chamber whereby plastic refractory material may be fed to said granulator chamber through said first and second or both feeding passages, and c) a pneumatic gun having an input for receiving granulated plastic refractory material and a discharge for discharging airborne particles, said pneumatic gun being located below said granulator with said input of said pneumatic gun disposed directly below said outlet of said granulator so that granulated particles of refractory material which are discharged from the granulator fall directly into the input of the pneumatic gun in a loose granular form and a pneumatically discharged therefrom in loose granular form.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000479147A CA1229974A (en) | 1985-04-15 | 1985-04-15 | Pneumatic gun for refractory plastic material |
| GB8609014A GB2174022B (en) | 1985-04-15 | 1986-04-14 | Granulating appartus and a pneumatic gun assembly including same granulating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000479147A CA1229974A (en) | 1985-04-15 | 1985-04-15 | Pneumatic gun for refractory plastic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1229974A true CA1229974A (en) | 1987-12-08 |
Family
ID=4130271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000479147A Expired CA1229974A (en) | 1985-04-15 | 1985-04-15 | Pneumatic gun for refractory plastic material |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1229974A (en) |
| GB (1) | GB2174022B (en) |
-
1985
- 1985-04-15 CA CA000479147A patent/CA1229974A/en not_active Expired
-
1986
- 1986-04-14 GB GB8609014A patent/GB2174022B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB8609014D0 (en) | 1986-05-21 |
| GB2174022A (en) | 1986-10-29 |
| GB2174022B (en) | 1989-06-21 |
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