JPS58500418A - Lining method for metal processing equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Lining method for metal processing equipment (Technical field) The present invention relates to metallurgy and casting technology, and in particular to a method for lining metal processing IT. Ru.

(Conventional technology) The development of lining technology for metal processing equipment, such as induction furnaces, has led to the production of linings. If the objective is to increase the stability of the lining while reducing the costs required for The engineer encountered an important problem.

The lining process of metal processing equipment is generally carried out as follows (M, G, T rofimov, Futerov-ka 1nduktsionnykh pe Chei, Moscow.

@Meta11urgia'', 1968.PP, 129-132). The bottom is lined in the usual way and then the inner walls of the furnace lining (crucible) are formed. A gauge is attached to the above [K*. Form the outer wall of this gauge and lining. a suitable element of the metal processing equipment for shaping (in the case of an induction furnace this element is an induction coil) The space between the be filled. The lining material is then tamped using various methods. Jin no Yo 5 The lining obtained by Ng is #! As a separation boundary between the hot water and the cooled 1114 coil of the furnace. There are three regions with different degrees of sintering, and the existence of these regions is It is caused by a large temperature gradient across the thickness of the inning. of lining (#! Closest to the hot water) The first region is naturally sintered and is the strongest region. It becomes.

Due to the low temperature, the second (middle) region is sintered to a lower degree than the first region, resulting in a small It is strong. In the third region of the lining (in contact with the induction coil of the furnace) However, if the individual particles of the heat-resistant material are not substantially bonded to each other, Not tied.

During the lining process, the lining material filling process and tamping process are as follows: This must be done in such a way as to ensure that

a) The degree of tamping in the first region depends on the minimum porosity and maximum strength of the lining. Maximum to obtain degree. This property indicates that the lining in this area can be bathed and dissolved. It is necessary because it provides resistance to the influence of objects.

b) The degree of tamping of the second region is low (high porosity).

C) The degree of tamping in the third region is such that this region compensates for the thermal expansion of the lining. Provided for compensation and to reduce impact effects on the lining during loading of the furnace Since it is a buffer layer for the purpose of porosity, it should be made the smallest, that is, the most porous.

The lining material is placed at the height of the crucible to increase the resistance of the lining of metal processing equipment. It is tamped evenly in the direction.

Furthermore, during the lining process, the initial granular composition of the lining material is maintained and immediately The debris separation must then be removed.

Ct'LK related to the granular composition of the lining material and the volume of the lining material Grain distribution influences the ratio between densified and porous volumes and affects the total porosity of the lining material and thereby Properties particularly affect strength and resistance to the effects of hot water. Grains of lining material The shape composition determines the number of contact points per volume between the grains of the refractory material. optimal For granular compositions, the void spaces between coarse grains are filled to the greatest extent with fine grains. contact The number of dots and the density of the lining material increases, thereby increasing the resistance of the lining enhance

In addition, during the lining process, there may be local depletion of the adhesive material of the lining material. In other words, condensation must be avoided.

If all the requirements mentioned above are met, the lining provides high operational reliability.

In order to obtain uniform compaction of the lining material with respect to the height of the crucible, various well-known The lining method is to pack the lining material in layers and tamp it down.

The process of compacting the layers is usually carried out by means of ranfugu (a Soviet invention). (See Certificate No. 500,452).

The drawback of such prior art is that the lining material stays at the height of the crucible during ramming. The lining material is tamped non-uniformly, while the lining material is tamped uniformly in the thickness direction. The third (loose) lining is compacted and must therefore have absorbent properties. The reason is that the area of #) is overly compacted. This is the lining This reduces the durability of the product. Furthermore, the ramming process is laborious and difficult to mechanize. , which considerably increases the cost of making the lining.

In addition, in the past, lining was developed to obtain various properties in the thickness direction of the lining. lining methods are known, which involve using different lining materials and Place these linings in the isolation jar in the space between the gauge and the furnace induction coil. It is proposed to use a container for packing (Swiss special liver no. 476.272) (See specifications). Based on this method, first the bottom of the furnace is lined, then the gauge is installed, a jacket is placed between the gauge and the furnace induction coil, and the jacket is placed between the gauge and the furnace induction coil. The ket is constructed in the form of a thin-walled shell, the height of which does not exceed its diameter. Ja The bracket is attached to three vertical wire rods attached to the furnace body, and these The rod allows the jacket to rise or fall against the resistance. Gage and Ja The space between the jacket and the induction coil should be properly lit. lining material, and this lining material is tamped down in a manner. In this way (the first line in the direction of crucible height The coating layer is molded. The jacket is then raised to a height commensurate with the thickness of the next layer. , and the filling cycle is repeated. Repeat this cycle The lining is then made over the entire height of the furnace.

A clear advantage of the lining method described above is that it can be used in different regions along the thickness of the crucible. area, especially to obtain a lining with two areas, and to obtain a lining with (molten metal) cheaper resistance for outer areas (further from the bath) than for inner areas (closer). The reason is that fire materials can be used.

However, several difficult problems arise when implementing this method in practice. Especially the light If the compaction of the lining material is carried out by ramming, the embodiment of the technique described above Therefore, what is urgently desired is the lining carried out in the above-mentioned alternative method of lining. A similar difficulty arises when an associated mining step is involved.

When vibration tamping is performed according to another embodiment of the invention, the gauge When the grain size reaches KF, the lining material is separated into individual pieces and the coarse grains gather in the game. This is due to the large number of linings in the first (inner) region. increases the porosity and thereby reduces the resistance of the lining to the action of molten metal. Mau.

Furthermore, the lining material in the upper part of the layer to be tamped is subjected to vibratory tamping. changes to a state close to a fluid state, which is due to the local 1 of the lining material relative to the fixed material. Depletion or concentration occurs, resulting in weak tamping in the height direction of the crucible.

This phenomenon results in overlapping areas of the lining, resulting in the infiltration of molten metal into it. , which reduces the life of the lining.

The lining work is carried out while the lining material is compacted using various vibrators. The human body is exposed to the harmful effects of filming.

of the lining material carried out by shaking according to the third embodiment of the above-mentioned technique. Compacting increases the overall porosity of the lining material (over its entire volume) and Uniform tamping of the lining material in the height direction of the crucible, similar to formal tamping. We cannot guarantee the results.

All of the above limitations impede the widespread utility of the technology.

(Description of the present invention) The basic aim of the invention is to change the technology of tamping of lining materials. Guarantees differential tamping in the thickness direction and uniformity in the height of the crucible. ensuring tamping and thereby increasing the cost required to produce the crucible. To provide a method for lining metal processing equipment that increases the resistance of the crucible without It's there.

According to the invention, this purpose is the process of lining the bottom of metal processing equipment, metal processing Take a gauge into the lined bottom to form the inner wall of the equipment lining. During the gluing process, appropriate metal processing equipment is used to form the outer wall of the gauge and lining. The lining material is layered after compacting each layer in the space between the elements. In the lining method for metal processing equipment, which consists of a process of filling in layers, The packing material is filled in each layer with a thickness of 4 to 10 times the space, and the tamping material of each layer is The cleaning process is performed by periodically supplying blows to the inner surface of the gauge. The direction of this blow is in a plane tangential to the inner surface of the gate 3. the blow is smaller than the decay time of the free lift of the metal processing equipment. This is achieved by a method characterized in that the information is supplied at equal time intervals.

Packing of lining material in each layer with a thickness of 4 to 10 times the said space, This is a necessary condition for performing high-quality tamping. The thickness of each layer is 4 of the space. If it is less than double, the lining becomes multi-layered and this reduces its durability. It ends up. This results in the separation of fragments of lining material in the upper part of each layer and The thickness of each layer generated by the gathering of coarse grains on the surface of 1- is the width of the space. 10 times or more, the tamping of the lining material has a local character; The finishing is unsatisfactory, which in some cases creates voids in the lining material.

This void also reduces the durability of the lining.

As mentioned above, the periodically repeated supply of blows causes resulting in different tamping of the lining material. The blow is directed towards the inner surface of the gauge. As the lining material is supplied, the lining material reaches its maximum extent in the first region closest to the gauge. tamped down, less tamped down in the middle area, and less tamped down in the third (outer) area. is tamped down to the lowest degree.

The time interval of the blow supply should be smaller than the decay time of free vibration of the metal processing equipment. Must be. Otherwise, the metal processing equipment will be in a state of forced vibration and the lining will be damaged. The lining material changes to a near fluid state, which results in fragmentation of the lining material and solidification. This results in local depletion or concentration of the material.

The blowing feed point preferably spans the gauge within each layer to be tamped. Therefore, the distance between adjacent crotches and the amount of blow in one stage are The distance between adjacent feeding points is equal to the size of the space into which the lining material is packed. The lower feed stage of the blow is placed at the interface between the layer to be tamped and the previous layer. , the upper feed stage of the blow is below the upper level of the layer to be compacted by the value of said space. The tamping process is performed from the lower level to the upper level, with each layer being tamped. On the other hand, 3S is repeated 5 times.

The distribution of such blow supply points in the height direction and circumferential direction of the crucible is Enables uniform tamping of the lining material, and allows for lining along the boundaries between the filled l- Prevents fragmentation of inning material. The repeated method of tamping is the whole story of lining. This results in a more even distribution of the lining material over the area.

The number of tamping cycles described above is optimal. The number of this cycle exceeds 5 If this occurs, the lining material begins to fragment in the gauge, and this occurs within the first area. This increases the porosity of the lining material within the It creates a gathering. This reduces the strength and resistance of the crucible to the action of bath water. This increases labor during crucible fabrication. If the number of repetitions is 3 (ro) ) resulting in incomplete tamping of the lining material in the first area. This reduces the strength and resistance of the lining.

When the space is relatively large (150 mm or more), the height direction of the crucible and In order to achieve a more uniform compaction of the lining material in both the Each stage may be moved downward a distance K for each repeated cycle of layer compaction. The special strategy is to move the blow supply point by the same distance as the step circumference Ka, δ is then the width of the space and %N is the number of tamping cycles.

Also, for each repeated cycle of layer tamping, the blowing force was changed to 6.10 It is reduced by 30-40% in the range of ~1.5·lON11s. The percentage policy is to reduce the amount as follows.

The reduction in impact force as shown in C is due to various thrusts of the lining material in the thickness direction of the crucible. Causes hardening. The absorption properties of the lining are improved, its cracks are reduced, and the lining The inning resistance is increased.

(Brief explanation of the drawing) The present invention will be described in detail below with reference to embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view of a coreless induction furnace lined according to the method of the present invention; Figure 2 shows the blow supply direction to the furnace gauge based on the lining method of the present invention. Fig. 3 shows the free oscillation wave pattern of the furnace. Showing the vibration process in the furnace lining that provides blowing over time intervals The diagram, Figure 4, shows the blowing at the same time interval as the decay time of the free oscillations of the furnace. A drawing corresponding to Fig. 3, Fig. 5 shows a block diagram with a time interval shorter than the decay time of the free oscillations of the furnace. A drawing corresponding to FIG. 3 in the case of performing a row, and FIG. The supply point of the blow over the gauge surface when compacting several layers of material [C] Schematic diagram showing the distribution, Figure 7, when the monitoring device is located in the furnace lining A schematic diagram of the tamping process of lining material with unexploded 8AKI, Figure 8 is the same as in Figure 7. FIG. 3 is a schematic diagram illustrating the distribution of blow points across the gauge surface in a case where the blow is applied;

(Optimal implementation method of the present invention) Based on the present invention, a light source for metal processing equipment such as a coreless induction furnace 1 (see FIG. 1) is provided. The coating process is performed as follows. First, using a general method, the bottom 2 of the furnace is Gauge 3 for lining (filling) and then forming the inner wall of the future lining is provided on the bottom 2. The induction coil 4 is outside the lining in this furnace. It is an element that forms I.

A lining material 6 is provided in the space 5 between the insulator of the induction coil 4 and the gauge 3. are packed one after another. The thickness S of each filled Fa (for example, layer 6m) is It is 4 to 10 times as large as S- in recording space 5.

Each filled layer of lining material 6 is periodically repeated toward the surface of gauge 30. Compacted by supplied blow. This blow is 2 times around the entire circumference of gauge 3. are supplied to points a0...at t b□...-bi, etc., and the direction of each blow is as follows: of gauge 3 at the corresponding point as indicated by the arrow in FIG. It is oriented perpendicularly to the virtual plane P that is tangent to the inner surface (one direction The angles α and β between the vertical line and the horizontal line of the virtual plane P are 90°).

The time interval of each blow is determined by the vibration of the furnace 1 (consisting of gauge-lining-induction coil). The damping time of the free vibration of the system) is determined to be no smaller than the decay time of the free vibration.

When we examine the vibration process of the vibration system in detail, we find that the drawings in Figures 3 to 5 show that The time (τ) is plotted on the horizontal axis, and the amplitude of vibration (A) is plotted on the Y-axis. ing.

The blow is free of said vibration system as shown in Figures 3 and 4 respectively. If the vibration exceeds the decay time T or is applied at the same time interval t, the area Thus, the desired compaction of the lining material, which is different, is achieved. the During operation, the lining material is spread evenly across the height and circumference of the furnace crucible. be tamed down.

If the time interval t is smaller than the time T (see section 5), the induction furnace is forced (non-reduced). damping) oscillations, which means that the furnace vibrations generated by the previous blow are still damping. This is because vibrations are generated by the start of the next blow when the next blow is not performed. this In the special case (the vibration process It is characterized by a curve like the one shown by the broken line in the fifth column. It will be done. In this case the lining material in the upper part of the layer to be compacted is in a fluid state. The state changes to a state close to that of Depletion or concentration occurs, thereby reducing the resistance of the lining.

In addition, in order to increase the productivity of lining, the time interval t between each blow should be as short as possible. or (has to be done, so this time interval t is a value that slightly exceeds the time interval T ( INl, 5 seconds).

A feed daint of blow over gauge 3 is applied to each 1@6a area to be tamped. Then, step a□-a Z...ai.

Adjacent in bl, bz”・bi e’1”2”・ci “1”2””i Spacing between rows1. (e.g. the spacing between stages C and d) and the mutual adjacency of certain stages, The distance t between the points that meet each other (for example, the distance between points d6 and d7) is the same as the distance δ in the space 5. It is advantageous to have a certain distribution. The lower stage a is composed of the layer to be tamped 6a and the previous The upper stage d is arranged at the boundary between the layer 6b and the layer 6b by the same value t as the spatial radiation δ. Located below [K] from the upper level of 6a. The tamping process should be done from the bottom upwards. This is done from stage a to stage dlc from 3 to 5 times for each layer to be tamped. It is repeated several times.

The supply of such a blow covers the entire volume of the space 5 between the gauge 3 and the induction coil 4. producing a uniform distribution of the lining material 6 over both the circumference and the height of the furnace crucible. Uniform tamping is formed over the boundary between each layer I'cG 5 lining material This prevents the separation of fragments of the material 6.

When @a of space 5 in metal processing equipment is relatively large (150 mm or more), K is In order to improve the tamping uniformity of the lining material in the height direction of the crucible, It is recommended that the blow be applied as shown in FIG. In this case Each tamping cycle δ returned For each step, each step is moved down by ″(K = −)− in the value @. In this case, δ is The space 50 is wide and N is the selected number of tamping cycles. The blow supply point is The same value 1K'' is moved around the circumference. , point a-a points toward gauge 3, b-bi, cm-ci, d , -di11 (These are shown as small circles for schematic purposes) and the second tamping In the work, the blow is aI,...a, l, b, I,...b, l, c, I +++ c, I, d □t +++ d, I (cre I (shown as a half-filled circle) and is fed into the third tamping operation. , a'...aj, b-...b, #, c:...c, t, d □′...d? (These are shown as black circles) Ru.

When carrying out the method of the invention, the best results are obtained after each repeated tamping cycle. In the range of blow force and impact force of 6.10% 1.5 @ 10 Nms This is achieved when the S value is reduced to a value of 3°%S40%. moreover This results in various compactions of the lining 60 within the space 5, which This improves the damping properties of the lining and increases its resistance.

If a monitoring device is installed in the furnace lining, e.g. A photoconductive block 7 (see Fig. 7) is installed for transmitting K heat rays (not shown). This block 7 has one end in contact with the gauge 3 and the other end in contact with the a-only coil of the furnace 1. When placed horizontally so as to extend outward through the opening provided in the In this case, the tamping process of the lining material 6 is performed as follows.

The layer of lining material 6 in which the photoconductive block 7 is arranged (as shown in FIG. in the manner described above, except for the area immediately adjacent to the photoconducting block 7). It is tamped down in several cycles by blowing at gauge 3 ( The final cycle blow supply point is a small circle a6...”10 #b6...b (indicated by lot, etc.). The area of the gauge 3 is located at the edge of the photoconductive block 7. Bounded by a circle concentric to surface 7a and half filled in FIG. The circle f□ and black (shown as a filled circle f1', etc.) is the same as δ+7, in this case - is the width of the space 50, and m is the maximum width of the monitoring device. dimension (in this case the diameter of the light-conducting block 7).

Said area is located after the final cycle of tamping of the main part of the layer 6 of lining material. The tamping operation is performed at the circle point f1. shown in FIG. f,・ ...by blowing in the direction indicated by the arrow in Fig. 7 toward f6. be called.

The tamping work in this area is also done over several cycles, and the starting force of the blow is , determined as for the final cycle of tamping of the main part of layer 6 of lining material. , i.e. has a minimum value, so the force is between 30 and 40 during each cycle. %. In this case, the blow supply point is the same value @K”( K=i) is moved by a circle Ka. In the 8th car, tamping work in the above area was carried out twice. A special case that occurs over a cycle is shown, where points f1...f, (half-filled) The black (filled circles) correspond to the first cycle, and the points f□′...f, # (black Bushitamaru) corresponds to the second cycle.

The tamping process of the area is carried out when the photoconductive block 7 is placed inside the lining material 6. This continues until it stops rotating around the axis. Such a photoconductive block 7 The method of tamping the lining material 6 in the area of the location will be determined later and at that time. (Reliable adhesion within the lining of the furnace 1 and its to ensure operation and to prevent the possibility of molten metal flowing through the crucible in this area. To prevent.

The above-mentioned lining method for metal processing equipment can be implemented using relatively simple equipment and mechanisms. The lining process can therefore be easily mechanized. Furthermore, based on the present invention (The tamping method for the lining material 6 is such that the blow supply frequency toward the gauge 3 is The time interval between each blow must be no less than the decay time of the free vibrations of the device. Since it is determined by simple conditions, it is possible to prevent C from causing harmful vibrations to human organs. Stop.

Furthermore, the present invention can be used to line a metal manuscript processing apparatus, particularly an induction furnace, based on the present invention IC. Let's explain based on an example.

[Example 1] The lining process for a coreless induction furnace with a capacity of 6 tons is carried out as follows.

After lining the paper in the usual way and installing the gauge, the desired fixation with quartzite is achieved. A lining material made of additives fills the space between the gauge and the induction coil insulation. It is stuffed inside layer upon layer. The width (δ) of the space is 159 mm, and the linen The thickness 18) of each layer of adhesive material is 600 mm.

Based on the method of the present invention, six quarts filled with lining material are blown to a gauge. By supplying it toward the inner surface in a direction perpendicular to the virtual plane PK (in Figure 2). and tamped it down. The blows were delivered at time intervals (1) of 2 seconds. Free swing of furnace 1 The decay time (T) of the motion was 1 second. The blow supply point to the gauge should be It was distributed in stages at the boundaries of each layer. the distance between adjacent rows and The distance between the @9 matching feed points of one stage of blowing was 150 mm. The lower tier is pierced Located at the interface between the layer to be consolidated and the previous layer, the upper step is from the upper level of the layer. It was located 1Ilk below by 15Qmm.

Each layer was tamped 3 times (N), and the blowing force was calculated by changing the impact force (I) to 40% ( Δ) in each cycle.

I=6*10N-s; l2=3.6・1ON”l; I3=2, 2・ 10 N@s.

The lining is compacted in this way, sintered from above, and the standard period (1,000 hours) I drove flawlessly for a long time. Subsequent analysis of the lining will determine its grain structure. Demonstrated that the product was uniform both through the thickness and height of the crucible It was done. Its lining has three clearly demarcated concentric areas, the first The area (the area that comes into contact with the molten metal) is sintered, and the melt penetrates (the area that comes into contact with the molten metal). the second region (middle region) is slightly sintered and less strong (metallized); It has a hole in the mountain. In the third region, the particles of refractory material have the highest density. It is not fixed between the smallest part, so that this area has damping properties. ing. This prevented molten metal from leaking from the crucible to the outer teeth of the furnace.

[Example 2] The furnace lining process was carried out as described in Example 1. Process Δ lameter was changed to the following 5 values.

s-90Qmm Δ...35% I...-6,10N-5 I2・-・3.9・10 N@S The lining thus obtained remains satisfactory (operational) during its entire reference period. It was done. Furthermore, the thickness of the metallized lining is smaller than in example 1, This increased the resistance to the effects of bath water.

[Example 3] The process of lining the furnace was carried out as described in Example 1.

The process parameters were changed to the following values:

S・-1,200mm N...5 1.-.30% 11・-・6.0・1ON@8 I, -4, 2・IQ N@s φ I3...2.9.10 N-3 The lining obtained in this fifth step remained satisfactory (in operation) during its entire reference period. It was done. Furthermore, the layer thickness of the metallized lining is smaller than in example 2. Ta.

[Example 4] The process of lining the furnace was carried out as described in Example 1.

The process parameters were changed to the following values:

""-"1*500mm N...3 Δ...40% I l-6, 0・10 N"I Iz ・-・3-6” 10 N@sI, -2, 2・10 N@8 The lining thus obtained operates satisfactorily during its entire reference period. It was done.

[Example 5] The lining process for a coreless induction furnace with a capacity of 10 tons was described in Example 1. It was carried out with The space between the induction coil insulator and the gauge is 170mm. The decay time of free vibration was 1.2 seconds. Compared to example 1, the process parameter is Next Yo5 na Ii [K changed! ”・1e360mm N・-・5 Δ...40% ! ,...6.0・10 Nll5 ■2...3.6.1G N.3 I 3 = ・2-2 ・10 N m B The lining obtained in this way is It operated satisfactorily throughout its entire reference period.

[Example 6] The furnace lining step was carried out as described in Example 1. Process parameters was changed to the following value:

8-1,200mm -10 Δ...10% I, -3, 2・10 N*5 I8...2.9・lONN1l 5I”’2-6”1ON11s The lining thus obtained is satisfactory (dried, but with no tamping). Because the number of cycles exceeds the recommended value, the damping characteristics of the lining are 1F) It was smaller than that of 1go. Because of C, there is a crack in the lining A crack was formed, and the bathhouse penetrated through the crack. to these places lining material along the gauge surface and the interface between the filled layers. This creates a pool of coarse debris, thereby increasing the porosity and lining in this location. The depth of the metallization layer has been increased.

[Example 7] The furnace lining process was carried out as described in Example 1. repeated persistence In the blowing process, the impact force value is reduced by 50% (Δ), and the impact force decreases. was supplied such that the value of is less than or equal to the recommended value.

Other process parameters were changed to the following values:

8.=900mm N...3 11=3.0-10 N-s ■2...1.5/10 N@@ I, -0,7”IO?J”1 The lining thus obtained operated satisfactorily, but in its first area The porosity of is greater than that in Example 1, thereby making the metal of the lining The depth of the converted layer has increased.

[Example 8] The furnace lining process was carried out for 5K as described in Example 1. Blow is the beginning Pressure is applied so that the impact force in two tamping cycles exceeds the recommended value. (supplied in the cycle of ρI, i.e. another process nocerameter is converted into a value.

S-1,2QQmm Δ...30% The lining obtained in this way is satisfactory (operated, but its granular composition There is no force at some locations in the thickness direction of the crucible, and the damping characteristics are smaller than in example 1, whereby the depth of the metallized layer of the lining has increased.

[Example 9] The furnace lining process was carried out as described in Example I. Gage and Serihiro II (δ) of the space between the coil and the insulator was 18 Qmm. rynin The number of tamping cycles (N) of the material and the value of the impact force in each cycle are It was the same as the example above. Each stage of blow supply is gauged with each repeated cycle. along δ was moved downward by a distance (i) of 60 mm. The blow supply point is on the circumference of the step. (see Figure 6).

Despite the large dimensions of the space mentioned above, the lining obtained in this way It was operated satisfactorily during its entire reference period.

[Example 10] The furnace lining process was carried out as described in Example I. gauge and temptation 4 #A(δ) of the space between the entire coil was 300 mm. lining The number of tamping cycles (N) of the material and the value of the impact force in each cycle are given as an example. It was the same as in 3. Each stage of blow feeding is a repeated tamping die. Ku δ is moved down a distance (i) of 5 Gmm along the gauge for each The points were moved the same distance along the circumference of the step (see Figure 6).

Despite the larger dimensions of the space mentioned above, the linen obtained after this 5k The car operated satisfactorily during its entire first quarter.

[Example 11 (Unfavorable example)] The furnace lining process was carried out as described in Example 1. La to be filled The thickness of each layer of inning material was 150 mm, less than the recommended value. other The process parameters were changed to the following values:

No...40% ll-6,0-10Na3 I, -3,2-10N-5 I3・2.2-10 N-8 The granular composition of the lining thus obtained is non-uniform in the height direction of the crucible. Therefore, the boundary of the filled layer KG is locally quite deep. A portion of the lining that has been oxidized is observed, which allows the bath to penetrate beyond the crucible and furnace. There was a danger that hot water would flow out.

[Example 12 (Unfavorable example)] The furnace lining step was carried out under pressure as described in Example 1. filled layer The thickness of the e-lame was thicker than the recommended value (2,000 mm. Other processes) The data was changed to the following value:

N...4 1...35% ll...6.0-10 N・$ ■2...3.9/10 N*S I3・-2, 5・10 N*S ! 4...1.6 fist 10 N11s The lining thus obtained is locally very unsound and therefore The molten metal penetrated into it to a very low position (third region, buffer region). this There was a danger that bath water would flow out of the spit and over the furnace.

[Example 13 (Unfavorable example)] This lining step was carried out as described in Example I. Blow is 0. Delivered at 3 second time intervals. Other process parameters can be changed to the following values: Ta.

8-900mm ■・・・6.0elONll5 For this reason, the time interval between blows in the lining process should be adjusted to the recommended value. Shortly thereafter, the gauge-lining-induction coil system is in a state of forced oscillation. , the lining material was in a state close to fluid state 11. This is fixed in a certain place A depleted part of the lining material is caused in the wood, and in some places, a # line part is caused. , resulting in fragmentation of the lining material. The bathtub is quite deep inside the lining ( seepage, thereby creating a risk of water flowing out of the crucible and over the furnace. Having shown and described a particular embodiment of the lining method according to the invention, Its various embodiments are readily conceivable to those skilled in the art, and therefore the present invention The invention is not limited to the above-mentioned embodiments or descriptions thereof (as defined in the claims). It shall be interpreted within the scope and spirit of the invention.

The invention can also be advantageously demonstrated when lining ironless induction furnaces.

Additionally, the invention is applicable to methods of lining other types of metal processing and casting equipment. Can be used.

Ef J international search report Inl@+nmushibenml^knock”””””’PCTISU81700031 1st Continuation of page 0 shots clearer: Gelnis Metislav Vuenczowicz Soviet Union 233014 Kaunas Ulitsa Chernyakhovskovo ・Day 5 0 shots clear person Zemliavitius Planas Vlade Soviet Union 2330 09 Kaunas Ulitza Parteizanu Day 36 Kave 48

Claims (1)

[Claims] 1. The process of lining the bottom of metal processing equipment, the inside of the lining of metal processing equipment The process of attaching a gauge to the bottom of KM terraning to form a wall, this gauge the space between the cage and the appropriate element of the metalworking equipment that forms the outer wall of the lining The process involves tamping each layer and then filling the lining material in layers. In the lining method for metal processing equipment, the lining material (6) is It is filled in layers with a thickness of 4 to 10 times the thickness of the gap (5), and the tamping work of each layer is done. By periodically and repeatedly supplying blows to the inner surface of the gauge (3), The direction of this blow is in a plane tangential to the inner surface of the gauge (3). the blow is smaller than the decay time of the free vibration of the gold processing equipment. A lining method for metal processing equipment, characterized in that the lining is supplied at equal time intervals. 2. The feed point of the blow is applied across the gauge (3) in each layer to be tamped. -a7　, bl・-bi, cl・-Cit　d　...-d,), and the adjacent The distance between adjacent supply points of crimping between mating stages and blowing in one stage is determined by the above-mentioned gap. The width of the gap (5) is the same as the width of the gap (5), and the lining material (6) is filled there. The lower stage of the feed point (a1...ai) is the layer to be tamped (6a) and the previous layer (fourth layer). 6b) and the upper stage of the blow supply point (d, -d , ) are arranged below the upper level of the tamping layer (6a) by the width of said space (5). The tamping process continues from the lower stage (a□・-aH) to the upper stage (d, -di). The tamping process is repeated 3 to 5 times for each layer of tamping. The method described in Scope No. 1. 3. For each repeated tamping cycle of layer (6a), the dimensions of said space (5) When δ is δ and the number of tamping cycles is N, each stage (a□...a,,b l, δ ...J, cl...c4. d,...d,) or moved downward by the value of K, claim characterized in that the point of supply of the blow is moved along the step circumference by the same amount. The method described in Scope No. 2. 4. For each repeated tamping cycle of the layer (61), the blowing force is equal to the impact force. is reduced by 30-40% in the range of 6.10 to 1.5.10”N-8. The method according to claim 2 or 3, characterized in that the method is reduced as follows. .