JP3685402B2 - Rotating drum type erosion test apparatus and test method for refractories - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotating drum type erosion test apparatus and a test method for a refractory.
[0002]
[Prior art]
Rotating drum method as a refractory erosion test method is a method in which a refractory sample is lined in a drum shape, erodant is supplied into the drum, heated by a burner or arc to melt the erodant, and the drum is rotated. This is a method in which the slag and the sample are brought into contact and eroded.
6 is a view for explaining a rotating drum erosion test apparatus of a burner heating system, FIG. 7 is a plan view of a refractory sample lined on the inner surface of the rotary drum, and FIG. 8 is a perspective view showing a piece of the refractory sample lined. is there.
[0003]
As shown in FIG. 6, this apparatus has a drive source 2 provided at the lower part of the gantry 1, a rotation transmission device 3 provided at the upper part of the gantry 1 and driven by the drive source 2, and detachable horizontally on the drive source 2. The rotary drum 4 placed on the rotary drum 4 and a burner 5 provided at one end of the rotary drum are provided.
[0004]
The lining of the refractory sample 8 into the rotating drum 4 is performed by lowering the rotating drum 4 from the rotation transmission device 3 to the work surface, and placing various refractory samples 8 on the inner surface of the drum outer shell 11 as shown in FIG. It is assembled in an almost regular polygon, and a heat insulating material or stamp material 12 is filled between the outer cylindrical iron skin 11 and the refractory sample 8, and the center of the drum 13 and the regular polygon (regular dodecagon in the figure) are aligned. Install.
[0005]
In the test, after the rotating drum 4 was placed on the rotation transmission device 3, the rotation drum 4 was heated to a predetermined temperature by the burner 5 while rotating the rotation drum 4 through the chain 9 and the rotation transmission device 3. The rotary drum 4 is stopped, the plug 6 is removed, the erodible material 10 is charged from the erodant charging / discharging hole 7, the plug 6 is inserted, and then the rotary drum 4 is started. The melted erosion material 10 contacts the refractory sample 8 lined on the inner surface of the drum, and erodes the inner surface 8a of the refractory sample 8 as shown in FIG. Thereafter, when a predetermined time has elapsed, the rotary drum 4 is stopped, the stopper 6 is removed, and the erodible material 10 that has reacted with the refractory sample 8 is discharged from the erodant input / discharge hole 6.
The test temperature, the amount of the erodible material, the immersion time of the erodible material, the number of times the erodible material is charged, etc. are appropriately set according to the characteristics of the refractory sample 8 and the erodible material 10.
[0006]
The advantage of this rotating drum erosion tester is that
・ Compared corrosion resistance can be compared with relatively large samples.
-At the same time, the corrosion resistance of many types of refractories can be compared and evaluated.
-As a heating method, gas combustion heating such as oxygen-propane or heating by an arc can be performed, so that the temperature and atmosphere in the furnace can be adjusted.
-Since the erodant can be replaced many times during the test, it is always possible to test with fresh erodant.
[0007]
[Problems to be solved by the invention]
In recent years, with the improvement of refractory materials, any refractory has become less likely to be damaged recently. In such comparative tests between high-grade refractories, the absolute amount of erosion is small and superior or inferior depending on the conventional erosion test. There are many cases where it is difficult to attach.
In particular, even if you try to compare the corrosion resistance of refractories that have been partially changed for the same type of refractory, and the refractories with slightly different firing temperatures, for example, under manufacturing conditions, the depth of damage due to erosion In many cases, the difference between samples is less likely to occur when the absolute amount of the sample is about several millimeters. Therefore, in order to increase the absolute amount of damage due to erosion, measures such as increasing the temperature of the conventional erosion test, extending the test time, and frequently replacing the erosion material in order to promote the reaction are performed.
[0008]
However, when the erosion test temperature is increased, the liquid phase generation due to the reaction is significantly different. Therefore, comparison with the assumption of erosion resistance in the actual furnace is not possible unless the temperature is close to the actual furnace temperature. In addition, there is no technical problem in extending the test time. However, the test has to be continued day and night, which requires a lot of labor.
[0009]
When charging and discharging the erosion material, the rotation and heating of the rotating drum must be temporarily interrupted, which has problems with test accuracy and the like, and the plug provided in the discharge hole must be manually attached and detached. The operation is complicated and the safety is problematic.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, it has been desired to develop an evaluation test apparatus for a refractory erosion test that can be easily performed under test conditions as close as possible to an actual furnace. For this purpose, the present invention has developed a device that can constantly supply fresh erosion material during the test and promote the reaction with the refractory sample, and has established a test method using this device.
According to the first aspect of the present invention, there is provided a refractory erosion test apparatus in which a refractory sample is lined on the inner surface of a rotating drum, heated to a predetermined temperature, and then an eroding material is put into the rotating drum while rotating. And an erosion material supply means provided at one end of the rotary drum, and a discharge hole for discharging the erosion material provided at the other end of the rotary drum.
According to a second aspect of the present invention, the tilting mechanism includes a first frame that is a base portion of an erosion test apparatus, and a second frame that has one end movable on the first frame and the other end attached to be movable up and down. It is characterized by that.
According to a third aspect of the present invention, the erosion material supply means includes a door provided at one upper end of the rotating drum, an extendable input pipe for supplying the erosion material from the door, and an erosion material on the input pipe. A belt conveyor for supplying erosion material, a tank for supplying erosion material to the belt conveyor, and a control means for controlling the door, the input pipe, and the belt conveyor. The amount of erosion material and the supply interval are preset in the control means. It is characterized by being.
According to a fourth aspect of the present invention, there is provided a refractory sample erosion test method in which a refractory sample is lined on the inner surface of a rotating drum, heated to a predetermined temperature, and then an erodant is introduced into the rotating drum while rotating. The eroding material is supplied from above the inclined surface of the rotating drum, and the eroding material is discharged from below the inclined surface.
The invention of claim 5 is characterized in that the erodant supply method intermittently supplies the erodant.
[0011]
If the rotary drum type erosion test apparatus is used, the rotary drum can be tilted at an arbitrary angle, and the eroded material can be applied to the rotary drum with an accurate input amount as time passes by a preset program. Since it is input, a highly accurate test is possible.
The tilting mechanism can tilt the rotating drum from the erodant input side toward the discharge side. In this way, the erodible material introduced from above the inclined surface of the rotating drum quickly dissolves in the drum and sequentially contacts the refractory sample lined on the inner surface of the drum from the upper side to the lower side of the refractory sample. The surface erodes and the reacted eroded material is discharged to the outside from below the drum. In this way, the eroded material that has been introduced naturally flows out to the discharge side along the drum inclination, so that new slag can always be supplied to all the refractory sample surfaces in the rotating drum.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
FIG. 1 is an overall configuration diagram (horizontal state) of a rotary drum erosion test apparatus according to an embodiment of the present invention, FIGS. 2 to 4 are partial views of the rotary drum erosion test apparatus for explaining slag charging, and FIG. FIG. 2 is an overall configuration diagram (tilted state) of a rotating drum erosion test apparatus.
[0013]
1, the refractory material sample 8 is set on the rotating drum 4 and the inner surface of the drum outer cylinder core is filled with a heat insulating material or a stamp material in the same manner as shown in FIG. The refractory samples are assembled in a substantially regular polygon, and the center of the drum is aligned with the center of the regular polygon.
[0014]
The rotary drum type erosion test apparatus according to the present invention comprises a frame 37 and a frame 38 mounted thereon with a drum inclination adjusting jack 29 and a flexible connecting member 39, as shown in the entire configuration diagram of FIGS. The rotating drum 4 supported by the rotation transmission device 3 can be tilted by the tilt mechanism. That is, the drum tilt adjusting jack 29 can tilt the rotating drum 4 from the erodant input side 33 toward the discharge side 34. It should be noted that, instead of the flexible connecting member, a hinge joint or the like may be used, and it is necessary that the structure does not cause backlash due to vibration or the like. By doing so, the erodible material 10 introduced from above the inclined surface of the rotating drum 4 quickly dissolves in the drum, and sequentially contacts the refractory sample 8 lined on the inner surface of the drum from the upper side to the lower side. The surface of the object sample is eroded, and the reacted eroded material is discharged to the outside from a slag discharge rod 30 provided below the drum. The inclination angle of the rotating drum is preferably 1 ° to 9 °. This angle can be appropriately selected depending on the characteristics of the refractory material sample and the erodible material. Further, the supply amount of the erodible material may be appropriately selected according to the characteristics of the refractory material sample and the erodible material. A slag automatic charging device including a slag storage tank 22, a belt conveyor 23, a chute 24, a slag charging pipe 25, and a heat-resistant steel lid 40 as an erodant is provided on the end side of the rotating drum that is upward when tilted. A slag discharge holder 27, a heat insulating cover 28, a slag discharge basin 30, a discharge slag container 31 and the like are provided on the rotating drum end side which is lower when the slag is discharged. Then, the slag in the slag storage tank 22 is conveyed by the belt conveyor 23 (FIG. 2), falls from the chute 24 to the upper door 21, and is put into the rotating drum 4 through the slag throwing pipe 25. The slag that flows toward the slag discharge holder 27 flows out from the discharge hole 41 of the heat insulating cover 28 provided at the end of the discharge holder 27 to the discharge rod 30 and the discharge slag container 31. Reference numeral 26 denotes a heater such as a burner. Although not shown, the rotary drum type erosion test apparatus is automatically operated under the control of the control panel, and each mechanism such as slag charging and discharging is automatically controlled according to the set conditions.
[0015]
Next, an example of an automatic slag charging procedure in the rotating drum erosion test will be described.
When the heater 26 is driven (FIG. 3) and the inside of the drum 4 is heated to a predetermined temperature, a slag charging automatic operation by the control panel is performed. In the state where the erosion device is tilted (FIGS. 4 and 5), for example, when slag is introduced at an interval of 5 minutes, the slag stored in the slag storage tank 22 in advance is a shutter with an adjusting screw at the entrance of the belt conveyor 23. The belt conveyor 23 is adjusted so that it can be charged 400 g / times when the belt conveyor 23 is rotated for 5 seconds. Also, set the conditions for the automatic slag injection control panel. When the charging interval of one cycle is set to 5 minutes and the total erosion time is set to 5 hours, the charging frequency is set to 60 times. Also, the belt conveyor rotation time with the slag charging amount adjusted to 400 g / time is set to 5 seconds.
[0016]
To start loading, set the switch on the control panel to automatic and press the start button. Then, the first slag charging operation is started. First, the heat-resistant steel lid 40 of the hole of the slag charging pipe 25 is opened by air driving power, and then the charging pipe 25 is inserted into the drum 4 (FIG. 4). At the same time, the belt conveyor 23 rotates for a predetermined time (5 seconds), and slag falls on the upper door 21 from the chute 24 and is fed into the drum 4 through the slag throwing pipe 25 (FIG. 5). At the same time as the belt conveyor 23 stops after 5 seconds, the feeding pipe 25 is pulled up, and then the pipe hole heat-resistant lid 40 is closed to complete the first slag charging. The reacted slag is discharged from the discharge hole 41 of the heat insulating cover 28 provided at the end of the discharge holder 27. When the erosion time is 5 hours, this charging cycle is repeated 60 times. These series of operations are fully automatic supply. In this way, by tilting the rotating drum and conducting the erosion test while repeating the slag charging-melting-flowing cycle, fresh erodible material is always supplied, erosion of the refractory sample is promoted, and the amount of damage Can be increased.
Moreover, since the degree of damage caused by the original erodant of various refractory samples can be enlarged without changing the composition of the erodant and the test temperature, the corrosion resistance between the materials can be compared with high accuracy.
[0017]
【The invention's effect】
When this test equipment is used, the erosion material thrown into the rotating drum naturally flows out to the discharge side along the inclination of the rotating drum, and new slag can be constantly supplied to all refractory sample surfaces in the rotating drum. Therefore, the test can be performed under conditions close to those of an actual furnace.
In addition, the absolute amount of damage due to erosion can be increased, the difference in the amount of damage between materials can be expanded, and simultaneously the corrosion resistance of many types of refractory samples can be compared and evaluated with high accuracy.
In addition, since the erosion material can be intermittently (nearly continuous) automatically inserted and discharged into the rotating drum using the erosion material supply device, the erosion material can be accurately input over time. Since it is put into a rotating drum, a highly accurate test becomes possible.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram (horizontal state) of a rotating drum erosion test apparatus.
FIG. 2 is a partial view of a rotating drum erosion test apparatus for explaining slag charging.
FIG. 3 is a partial view of a rotating drum erosion test apparatus for explaining slag charging.
FIG. 4 is a partial view of a rotating drum erosion test apparatus for explaining slag charging.
FIG. 5 is an overall configuration diagram (tilted state) of the rotating drum erosion test apparatus.
FIG. 6 is a diagram illustrating a burner heating type rotary drum erosion test apparatus.
FIG. 7 is a plan view of a refractory sample lined on the inner surface of a rotating drum.
FIG. 8 is a perspective view showing a piece of refractory sample lined.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Rotation transmission apparatus, 4 ... Rotating drum, 8 ... Refractory sample, 10 ... Erosion material, 22 ... Slag storage tank, 23 ... Belt conveyor, 24 ... Chute, 25 ... Slag injection pipe, 26 ... Heater, 27 ... Slag discharge holder, 28 ... heat-proof lid, 29 ... drum tilt adjusting jack, 30 ... slag discharge rod, 37, 38 ... frame, 40 ... heat-resistant steel lid, 41 ... slag discharge hole.

Claims (5)

In a refractory erosion tester that places a refractory sample on the inner surface of a rotating drum, heats it to a predetermined temperature, and then injects the erodant into the rotating drum while rotating it, a tilt mechanism for tilting the rotating drum, and rotation A rotary drum type erosion test apparatus for a refractory comprising an erosion material supply means provided at one end of a drum and a discharge hole for discharging the erosion material provided at the other end of the rotary drum. The tilt mechanism includes a first frame that is a base portion of an erosion test apparatus, and a second frame that has one end movable on the first frame and the other end attached to be movable up and down. The rotating drum type erosion test apparatus according to claim 1. The erosion material supply means includes a door provided at one upper end of the rotating drum, an extendable input pipe for supplying the erosion material from the door, a belt conveyor for supplying the erosion material to the input pipe, The tank includes a tank for supplying an erodible material to the belt conveyor, and a control unit for controlling the door, the input pipe, and the belt conveyor, and an amount of an erodible material and a supply interval are set in the control unit in advance. The rotating drum type erosion test apparatus according to claim 1 or 2. In the erosion test method for a refractory sample, in which the refractory sample is lined on the inner surface of the rotating drum, heated to a predetermined temperature, and then the eroding material is put into the rotating drum while rotating, the tilting of the rotating drum is performed by tilting the rotating drum. A rotating drum type erosion test method for a refractory, characterized in that the erodant is supplied from above and the erodant is discharged from below the inclined surface. 5. The rotary drum type erosion test method for a refractory according to claim 4, wherein the erodant supply method intermittently supplies the erosion material.

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