TWI393697B - A cooling treatment device for melting molten slag and a cooling method - Google Patents

Description

Cooling treatment device for melting slag and cooling treatment method

The present invention relates to a cooling drum type molten slag cooling treatment apparatus, a cooling treatment method using the molten slag of the apparatus, and a method of manufacturing the slag product.

The molten slag (such as steel slag) produced in the iron and steel manufacturing process is mostly cooled in a cooling field and then sprinkled with water. In addition, some of them have been introduced into an iron container known as a "plate cooling type" and subjected to watering and cooling.

On the other hand, a device for cooling a molten slag such as blast furnace slag or waste incineration ash melting slag is known as a double drum type slag cooling treatment device (for example, Patent No. 3613106). The slag cooling treatment apparatus includes a pair of cooling drums arranged side by side in the horizontal direction and having a rotation direction that rotates upward with respect to the outer peripheral portion, and the molten slag is supplied from above to the upper outer peripheral surface of the pair of cooling drums. Between, and the formation of slag liquid retention. The molten slag is entrained by the slag liquid adhering and adhering to the surface of the cooling drum that is being rotated, and the molten slag is cooled to a moderately solidified state while being attached to the surface of the cooling drum. Further, at a predetermined drum rotation position, it is peeled off from the cooling drum surface by its own weight, and is recovered by a recovery means.

Cooling treatment of the molten slag by using such a cooling treatment device has the following advantages: (i) does not require a large number of cooling fields as is conventional; (ii) a slag solidified body having a small thickness, so that it can be easily processed into a civil material, a coarse aggregate, or the like of a desired particle size, and when the pulverized slag is produced by the crushing treatment, the amount of powder or fine granules is small, and thus Improve the yield of the product; (iii) do not need to be used for the cooling of the sprinkling water, or less watering, so that the slag without water or less moisture can be obtained, in the case of cement raw materials, etc. No drying treatment is required at the time.

However, in the above-described double drum type slag cooling processing apparatus, since the processed slag is discharged from the pair of cooling drums in opposite directions, the slag discharge/treatment of the cooling process requires 2 paths, resulting in a wide need. The area of the venue. Therefore, the disposal, post-treatment, and heat recovery of the slag after cooling treatment are both cumbersome, and the efficiency is poor and the equipment cost is also increased.

The slag subjected to the cooling treatment by the cooling drum type cooling treatment device has a considerable sensible heat. Therefore, from the viewpoint of efficient use of energy, if it is desired to recover the sensible heat of the slag as much as possible, it is important from the Heat recovery is performed in the slag cooled. However, in the case of the conventional double-drum type slag cooling treatment device, if the slag which has been cooled and discharged in the forward and reverse directions is to be treated by one heat recovery device, the two paths are integrated into one. During the transfer process, the slag temperature is lowered and efficient heat recovery cannot be performed. This situation is particularly problematic when a large amount of molten slag is processed.

Furthermore, when a large double-drum slag cooling treatment device is used, a large amount of molten slag is processed (for example, slag processing amount: 1 t/min or more), and when molten slag is poured from the slag pot toward the cooling drum, there is a cause Falling molten slag load causes The cooling drum suffers from a loss. In order to prevent this, it is necessary to provide a tundish above the cooling drum, and the molten slag of the slag pot is temporarily moved to the tundish, and then poured into the cooling drum from the tundish. However, when the infusion of the molten slag is performed using a tundish, unlike the molten metal, the slag is solidified and adhered to the gate, resulting in failure to properly perform the perfusion or the like, which may easily hinder the operation. Further, the amount of slag remaining/attached in the tundish is also increased, and problems such as clogging of the infusion port and pulverization of residual slag are likely to occur. On the other hand, in order not to cause such residual ‧ adhesion slag, it is necessary to provide a tundish heater, which causes problems such as a decrease in energy efficiency and an increase in processing cost.

When a slag product such as blast furnace slag or the like is produced, it becomes amorphous (glassy) slag according to the production conditions, but the amorphous slag has low hygroscopicity and is prone to sharp corners, thereby causing problem. Further, in the case where fibrous slag is generated, it is not suitable as a shape that biases the aggregate product. Further, if it is in the form of fine fibers, it is necessary to take measures including environmental measures such as prevention of scattering.

Further, according to the results of the review by the inventors of the present invention, it has been determined that the conventional double drum type slag cooling processing apparatus has the following problems:

(a) If the melting slag has a higher alkalinity [mass ratio: %CaO/%SiO ₂ ] (hereinafter referred to as "alkalinity"), such as converter decarburization refining slag, the viscosity is higher, and the viscosity is higher. When the high melting slag is cooled by the conventional double drum type slag cooling treatment device, the molten slag is not easily adhered to the cooling drum surface due to high viscosity, and the entire drum surface cannot be effectively used. After cooling treatment. Therefore, the cooling efficiency of the molten slag is low, and high productivity cannot be obtained. In addition, the slag having a relatively high alkalinity (especially alkalinity ≧3) is more easily pulverized, and the slag is quenched from a molten state, although it is not easy to be pulverized, but when using a conventional slag cooling treatment device When the cooling treatment is performed, the thickness cannot be reduced due to the high viscosity, and a sufficient cooling rate cannot be obtained, so that the powdering after cooling cannot be appropriately suppressed.

(b) When the slag cooling treatment device of the conventional double drum type is used to cool the molten slag having a small viscosity like the blast furnace slag, only the solid slag solidified body having a thickness of about 2 to 3 mm can be obtained, even if The crushing treatment is carried out in a granular form, and the particle size necessary for the coarse aggregate, the road bed material, and the like is still not satisfied. Further, since the thin slag solidified body is made of glass, the water retention property is lowered, and from this point of view, it is not suitable for a road bed material or the like. Therefore, the object of the present invention is to solve such conventional technical problems and to provide a slag product manufacturing apparatus which is easy to handle, such as disposal of slag after cooling treatment, post-treatment, etc., and which can reduce equipment cost, even if large equipment is not required. A cooling drum type molten slag cooling treatment device that performs a large amount of treatment on the molten slag without the loss of the molten slag supplied by the supplied molten slag, resulting in a loss of the cooling slag.

Furthermore, another object of the present invention is to provide an efficient cooling treatment for a molten slag having a high alkalinity and viscosity, and in particular, even if the slag having a high alkalinity is obtained, it is not easy to be pulverized. A cooling treatment device for melting slag of a slag solidified body.

Furthermore, another object of the present invention is to provide a molten slag having a small viscosity. When it is to be processed, it is possible to manufacture a cooling treatment apparatus for melting slag which is suitable for obtaining a thick slag solidified body of a slag product such as a coarse aggregate.

Further, another object of the present invention is to provide a cooling treatment method using molten slag as in the above-described cooling treatment apparatus.

Furthermore, another object of the present invention is to provide a method of producing a slag product using such a cooling treatment method.

In order to solve the above problems, the gist of the present invention is as follows:

[1] A cooling treatment apparatus for melting slag, comprising: a single horizontal cooling drum (1) that causes molten slag to adhere to a peripheral drum surface (100) and is cooled, and rotatable; The cooling drum (1) supplies a barrel (2) for melting the slag; wherein the slag attached to the drum surface (100) and cooled is rotated by the horizontal cooling drum (1) from the drum surface ( 100) peel off and discharge in one direction.

[2] The cooling treatment device for molten slag according to [1] above, wherein the front end portion of the tub (2) is adjacent to or close to the drum surface (100) of the horizontal cooling drum (1) The tub (2), the molten slag is directly supplied to the drum surface (100) from the front end portion of the tub (2), and is attached to the drum surface (100).

[3] The cooling treatment device for molten slag according to the above [1], wherein the front end portion of the tub (2) is adjacent to or close to the drum surface (100) of the horizontal cooling drum (1). a barrel (2), and a slag liquid retention portion (A) is formed by the barrel (2) and the drum surface (100), and the slag is rotated with the horizontal cooling drum (1) The molten slag in the liquid retention portion (A) adheres to the drum surface (100) and is taken out.

[4] The cooling treatment apparatus for molten slag according to any one of the above [1] to [3], which has melting for adhesion to the drum surface (100) of the horizontal cooling drum (1) The slag is subjected to a stretching roll (3) which is rolled and stretched toward the width of the drum.

[5] The cooling treatment device for molten slag according to the above [1], wherein the front end portion of the tub (2) is adjacent to or close to the drum surface (100) of the horizontal cooling drum (1). a barrel (2), and a crucible (4) is disposed above the horizontal cooling drum (1), and the slag liquid retention portion (A) is formed by the crucible (4), the drum surface (100), and the barrel (2), and An opening (5) for extruding molten slag in the slag liquid retention portion (A) is provided between the crucible (4) and the horizontal cooling drum (1).

[6] The cooling treatment device for molten slag according to the above [5], wherein the crucible (4) is constituted by a cooling drum (4x) having a lower outer peripheral surface having an anti-slag liquid retention portion (A) Direction of rotation in the direction of rotation.

[7] The cooling treatment apparatus for molten slag according to any one of the above [3], wherein the fluid supply means for blowing the fluid into the slag liquid retention portion (A) is provided (6) ).

[8] The cooling treatment apparatus for molten slag according to any one of the above [1] to [7], wherein the melting treatment for peeling off the drum surface (100) of the horizontal cooling drum (1) is provided. The slag is cooled by means of cooling (7).

[9] A cooling treatment method for molten slag, which uses the above [1]~[8] The cooling treatment device according to any one of the preceding claims, wherein the molten slag is subjected to a cooling treatment.

[10] The cooling treatment method of the molten slag according to the above [9], which uses a cooling treatment apparatus having a stretching roll (3), and has a slag basicity [mass ratio: %CaO/%SiO ₂ ] of 2 The molten slag described above is treated as a target, and the molten slag adhering to the drum surface (100) is rolled by the stretching roll (3) and stretched in the roll width direction.

[11] The method for cooling a molten slag according to [9] above, wherein a cooling treatment apparatus having ruthenium (4) is used, which extrudes slag from the opening (5).

[12] The method for cooling a molten slag according to [11] above, wherein the plate-shaped slag having a thickness of 5 mm or more is extruded from the opening (5).

[13] The method for cooling a molten slag according to any one of the above [9] to [12], wherein the slag liquid is retained by using a cooling treatment device having a slag liquid retention portion (A) Powder is added to the molten slag in the portion (A).

[14] The method for cooling a molten slag according to any one of the above [9] to [13], wherein the slag liquid retention portion is used in a cooling treatment device having a slag liquid retention portion (A) A fluid is blown into the molten slag in A).

[15] The method for cooling a molten slag according to any one of the above [9] to [14], wherein the heat recovery is performed by at least one of the following (i) to (iv): (i) passing Heat recovery is performed in the refrigerant inside the horizontal cooling drum (1); (ii) in the cooling treatment using the molten slag having the cooling treatment device of the crucible (4), heat recovery is performed from the refrigerant passing through the crucible (4); (iii) further cooling the slag cooled by the horizontal cooling drum (1) The medium is in contact with the heat recovery from the refrigerant; (iv) in the cooling treatment of the molten slag using the cooling treatment device having the slag liquid retention portion (A), in the slag liquid retention portion (A) When the fluid is blown into the molten slag, the blown fluid is recovered, and heat recovery is performed from the fluid.

[16] A method for producing a slag product, which is a slag which is cooled and solidified by the cooling treatment method according to any one of the above [9] to [15], and is subjected to a crushing treatment and/or a grinding treatment. A granular slag product is obtained.

Further, in the present invention, the opening (5) between the crucible (4) and the horizontal cooling drum (1) is formed by intermittently forming the outer shape of the crucible (4) or the horizontal cooling drum (1). That is, when the crucible (4) and the horizontal cooling drum (1) intermittently form an opening), at this time, the molten slag in the slag liquid retention portion (A) is extruded from the opening (5). Continuous.

In the cooling treatment apparatus and the cooling treatment method of the molten slag according to the present invention, the type of the slag to be subjected to the cooling treatment is not limited, and for example, it may be: blast furnace slag or steel slag (for example, converter decarburization slag or detachment) Phosphate slag, desulfurization slag, desulfurization slag, electric furnace slag, casting slag, etc.), smelting reduction slag (for example: iron ore, Cr ore, Ni ore, Mn ore, etc. Slag), slag generated from other smelting furnaces, refining furnaces, ash incineration ash melting slag, waste gasification melting slag, and other slag.

Fig. 1 is a schematic front elevational view showing an embodiment of a cooling treatment device and a cooling treatment method for a molten slag according to the present invention.

The cooling treatment device for the molten slag includes a single horizontal cooling drum 1 (hereinafter referred to as "cooling drum 1") which is provided with a molten slag attached to the outer drum surface 100 and cooled, and is also referred to as "cooling drum 1". And the tub 2 for supplying the molten slag to the cooling drum 1. Here, the "horizontal type" of the horizontal cooling drum means that the rotation axis of the drum is substantially horizontal.

The tub 2 is disposed on one side of the radial direction of the cooling drum, and supplies the molten slag S from the appropriate height toward the upper drum surface of the cooling drum 1. The molten slag S is supplied from the slag pot or the like to the upstream side of the tub 2 .

The form of the tub 2 is arbitrary, and by using a sufficient width in the width direction of the cooling drum (the direction of the drum axis), the molten slag can be expanded toward the width direction of the drum, and the molten slag can be uniformly distributed by the drum surface 100. cool down.

The cooling drum 1 is rotationally driven by a driving device (not shown) so as to rotate in the direction of the counter drum in the upper drum surface. The molten slag S supplied from the tub 2 is attached to the drum surface 100 and cooled, and then peeled off from the drum surface 100 as the cooling drum 1 rotates, and is discharged to the other side in the radial direction of the cooling drum.

Further, it is preferable that the cooling drum 1 can control the number of rotations in accordance with the operating conditions.

An internal cooling mechanism (not shown) including a flow path through which the refrigerant passes is provided inside the cooling drum 1, and a refrigerant supply unit and a refrigerant discharge unit for the internal cooling mechanism are provided at respective ends of the drum shaft. In addition, the refrigerant generally uses water (cooling water), but other fluids (liquid or gas) may also be used.

On the other side of the cooling drum radial direction, a transport conveyor belt 8 for collecting and transporting the slag Sx which has been cooled and peeled off from the drum surface 100 is disposed. The slag adhering to the surface of the cooling drum 1 and being cooled is detached from the drum surface 100 by the self-weight at the rotational position of the drum surface 100 at the lower side of the drum, so that the transport conveyor 8 of the present embodiment is disposed. It is capable of receiving the height position of the slag Sx thus peeled off. Further, a guide member for guiding the slag Sx peeled off from the drum surface 100 to the conveyance conveyor belt 8 may be provided.

A slag bucket 9 for receiving the slag Sx and carrying out heat recovery by cooling the slag Sx with a refrigerant is provided at a transfer destination of the conveyance conveyor 8.

Further, a transporting belt 8 may not be provided, and a chute may be provided between the cooling drum 1 and the slag tank 9, and the slag Sx peeled from the cooling drum 1 may be loaded into the slag tank 9 via the chute. .

Further, the cooling drum 1 of the present embodiment has a smooth cylindrical surface, but is not limited thereto, and may have irregularities such as grooves.

The cooling treatment using the molten slag of the above-described cooling treatment apparatus supplies the molten slag S flowing down from the tub 2 to the drum surface 100 of the cooling drum 1, and the molten slag S is applied to the drum surface 100. When it adheres to a plate shape, it is cooled to a moderately solidified state (for example, a semi-solidified state or a state in which only one surface or double-sided surface layer is solidified), and then naturally peeled off from the cooling drum surface by its own weight at a predetermined drum rotation position. The peeled slag Sx is directly collected by the transport conveyor 8 and transported by the transport conveyor 8 and loaded into the melt In the slag bucket 9. Moreover, the conveyance speed of the conveyance conveyor 8 is substantially the same as the circumferential speed of the cooling drum 1.

In the cooling treatment of the molten slag S as described above, since the slag Sx subjected to the cooling treatment which is peeled off from the drum surface 100 of the single cooling drum 1 is discharged in one direction, the treatment of the slag after the cooling treatment is performed, and the post treatment is performed. easily. Therefore, when sensible heat recovery is performed from the cooled slag Sx, heat recovery can be efficiently performed by one heat recovery apparatus. Further, since a large drop load is not applied to the cooling drum 1 by melting the slag S, the molten slag S can be processed in a large amount without losing the cooling drum 1.

The refrigerant is supplied into the slag tank 9 and the slag Sx is cooled. Further, the cooling of the slag Sx peeled off from the cooling drum 1 can be carried out by other means or places. The cooled slag Sx is supplied to a step of performing a crushing treatment and/or a grinding treatment for forming a slag product, and is subjected to sizing by sieving or the like as necessary.

Usually, the slag Sx which has just been cooled by the cooling drum 1 exhibits a moderately solidified state as described above, and since it has plasticity, it is peeled off from the cooling drum surface, and the slag Sx collected by the conveying conveyor belt 8 is Plate-like continuum. However, depending on the thickness of the slag Sx and the degree of solidification, the continuous body of the plate-shaped slag may be pulverized while being peeled off from the surface of the cooling drum and collected by the conveyance belt 8, but it does not pose a problem.

Further, when the slag Sx is transported from the transport conveyor 8 to the tub or the like, the slag Sx may be coarsely crushed by an appropriate means as needed.

Fig. 2 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

In the present embodiment, the tub 2 is such that its front end portion is adjacent to or close to the drum surface 100 of the cooling drum 1, and the molten slag S is directly supplied from the front end portion of the tub 2 to the drum surface 100, and is attached to the drum surface. 100.

The front end portion of the tub 2 may be adjacent to the drum surface 100, or may form a small gap to be close to the drum surface 100. In the latter case, it is preferable to consider the thermal expansion or the like to bring the molten slag S into contact with the gap so that the molten slag S does not leak, but in order to surely prevent the molten slag S from leaking, it is preferable that the gap portion is from below the tub 2 The gas injection means 10 provided is sprayed with a forced gas.

The gap between the front end portion of the tub and the drum surface 100 varies depending on the viscosity of the molten slag. However, when the slag treatment is performed at a high temperature, the widest width is preferably 5 mm or less, more preferably 3 mm or less. 1mm or less. The narrower the gap, the more the amount of forced gas can be reduced. The gap limit that can suppress the leakage of molten slag without the use of a forced gas, although depending on the properties of the molten slag (viscosity), if the gap can be set to a bare contact state of 1 mm or less, almost any In the case, even if there is no forced gas, the molten slag can be suppressed from leaking. Because the narrower the gap, the more the drum surface wear and loss caused by the contact at the front end of the tub is promoted. Therefore, it is preferable to use the carbon property with good sliding property with respect to the front end portion of the tub which is likely to contact the drum surface. Or other materials such as boron nitride. Among them, the gap value is a value at the time of actual operation (high temperature state), and when the device is set at a normal temperature, it is necessary to consider the thermal expansion of the cooling drum as described above. An example of thermal expansion is exemplified below. When the steel has a diameter of 1.6 m 冷却 cooling drum, the thermal expansion coefficient of the steel is 15×10 ^-6 , and when the average temperature of the roller material is 200° C., the length extending in the radial direction due to thermal expansion becomes a radius of 800 mm×200° C×15×10 ^{-6 .} =2.4mm.

In addition, since the rest of the structure of this embodiment is the embodiment shown in FIG. 1, the detailed description is abbreviate|omitted.

By using the cooling treatment of the molten slag of the above-described cooling treatment apparatus, since the falling load due to the molten slag S is hardly applied to the cooling drum 1, the loss of the cooling drum 1 can be further alleviated.

Fig. 3 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

In the present embodiment, the tub 2 is provided such that the front end portion thereof is adjacent to or close to the drum surface 100 of the cooling drum 1, and the slag liquid retention portion A is formed by the front end portion of the tub 2 and the drum surface 100, with the cooling drum 1 After the rotation, the molten slag S in the slag liquid retention portion A adheres to the drum surface 100 and is taken out. In order to form the slag liquid retention portion A, the front end portion of the tub 2 has a receiving dish shape that is curved or curved toward the upper side (horizontal shape), and the front end portion of the tub 2 is adjacent to or close to the lower drum surface.

Further, the side wall 200 of the front end portion of the tub which forms the slag liquid retention portion A has a predetermined height in order to hold the molten slag S.

In addition, since the rest of the structure of this embodiment is the embodiment shown in FIG. 1, the detailed description is abbreviate|omitted.

Supplying using a cooling slag of a cooling treatment device as described above, The molten slag S of the tub 2 flows into the slag liquid retention portion A, and after being cooled for a suitable period of time, it is attached to the drum surface 100 of the cooling drum 1 and taken out, as shown in Fig. 1 and In the embodiment of the second embodiment, after being adhered to the drum surface 100, it is cooled to a moderately solidified state (for example, a semi-solidified state or a state in which only one surface or both surfaces are solidified), and then used at a predetermined drum rotation position. The self-weight is naturally peeled off from the surface of the cooling drum. In the present embodiment, the molten slag S is retained in the slag liquid retention portion A for a sufficient period of time to promote cooling, so that the thick plate slag Sx can be easily obtained.

4 to 6 are schematic views showing another embodiment of a cooling treatment device and a cooling treatment method for a molten slag according to the present invention, and Fig. 4 is a front view, Fig. 5 is a plan view, and Fig. 6 is a cooling roller. An explanatory view of the action of the stretching roller attached thereto.

The cooling treatment apparatus according to the present embodiment is provided with a stretching roll 3 for rolling the molten slag S attached to the drum surface 100 of the cooling drum 1 and stretching in the width direction of the drum, and is particularly suitable for high viscosity. Further, the slag basicity [mass ratio: %CaO/%SiO ₂ ] (hereinafter referred to as "basicity") is a cooling treatment of molten slag of 2 or more. The slag of alkalinity ≧2 is, for example, converter decarburization refining slag, dephosphorization slag, electric furnace slag, steel slag, waste gasification melting slag, waste incineration ash melting slag, etc. .

In the upper portion of the cooling drum 1, a stretching roller 3 belonging to a slag drawing means is provided in parallel with the cooling drum 1. The drawing roll 3 performs rolling rolling of the molten slag S adhered to the drum surface 100 (upper outer peripheral surface) of the cooling drum 1, and is directed toward the drum The support arm 11 is rotatably supported so as to form a predetermined interval t between the outer peripheral surface 300 and the drum surface 100 of the cooling drum 1 in the width direction. In the present embodiment, an elliptical bearing hole 110 elongated in the vertical direction is formed at the front end (lower end) of the support arm 11, and the roller shaft 301 of the stretching roller 3 is supported by the bearing hole 110 so as to be slidable up and down. Therefore, the drawing roll 3 of the present embodiment is not driven, but the molten slag S adhered to the upper drum surface of the cooling drum 1 is rolled to a thickness of the interval t by its own weight.

According to the present embodiment, the stretching roller 3 is supported by the support arm 11 so as to be vertically slidable, and even if the molten slag adhering to the cooling drum surface contains a solid block, the stretching roller 3 faces upward. Escape can make the block pass.

Further, the stretching roller 3 may be fixedly supported so as to be rotatable with respect to the support arm 11 in a state of having a predetermined interval t from the surface of the cooling drum. In this case, it is preferable that the stretching roller 3 can be positionally adjusted in the up and down direction, and the interval t can be adjusted. Further, the roller bearing of the stretching roller 3 is rotatably held, and can be supported by the support arm 11 or the like via a spring, and the spring is used to obtain a moderate pressing force, and is configured to be able to be engaged when foreign matter is caught. The structure in which the stretching roll 3 is retracted. Further, the stretching roller 3 can also be set as a driving roller.

The stretching roller 3 is used for rolling and stretching the molten slag S attached to the cooling drum surface, and the outer diameter is preferably sufficiently smaller than the outer diameter of the cooling drum 1, but if the length of the roller becomes long, the slag heat is generated. The bending of the self-weight or the interval t between the surfaces of the cooling rolls tends to fluctuate in the width direction of the roll. Therefore, it is preferable to select the outer diameter in accordance with the length of the roll and the rigidity of the roll.

Further, the related stretching rolls 3 preferably have an internal cooling mechanism like the above-described cooling drum 1 from the viewpoint of melting slag cooling efficiency and durability of the stretching rolls.

Further, the stretching rolls 3 may be placed at a plurality of places in the circumferential direction of the cooling drum, and the slag adhering to the drum surface may be rolled in a plurality of stages by the plurality of stretching rolls 3.

In addition, since the rest of the structure of this embodiment is the embodiment shown in FIG. 3, detailed description is abbreviate|omitted. Further, the stretching roll 3 of the present embodiment may be attached to the cooling processing apparatus of the embodiment shown in Figs. 1 and 2 .

When the viscous slag is cooled by the cooling treatment device as described above, it is carried out from the slag liquid retention portion A to the cooling drum 1 and adhered to the drum surface 100 with high viscosity. The molten slag S is not easily spread in the drum width direction (the drum axis direction), and thus exhibits a state in which the drum surface 100 is unevenly attached to the drum width direction (a state in which it is locally adhered to the cooling drum surface). In this state, the cooling efficiency of the molten slag S (= slag heat dissipation per unit time / slag unit volume) is very poor, and the solidified state when the slag is peeled off from the cooling drum 1 becomes uneven, resulting in unevenness Quality has changed. In the present embodiment, the molten slag S which is unevenly adhered to the drum surface 100 is rolled by the stretching rolls 3 and stretched in the drum width direction. Thereby, the cooling efficiency of the molten slag S can be increased, and the cooling rate of the molten slag S can also be increased. As in the embodiment of FIGS. 1 to 3, the molten slag S is cooled to a moderately solidified state in a state of being attached to the surface of the cooling drum (for example) After the semi-solidified state or the state in which only the surface layer is solidified, it is naturally peeled off from the surface of the cooling drum by its own weight at a predetermined drum rotation position.

According to this, as a result of the stretching of the molten slag S by the stretching rolls 3 in the width direction of the drum, the thickness of the molten slag S is thinned, the cooling efficiency of the slag is improved, the productivity is improved, and the cooling rate of the molten slag S is increased. It is also improved, so that a slag solidified body which is not easily pulverized can be obtained. Further, a slag solidified body in which the slag solidified state is uniform and uniform in quality can be obtained.

Fig. 7 is a schematic plan view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention. The cooling treatment apparatus of the present embodiment also has a stretching roll 3 which is a slag stretching means.

In the present embodiment, the plurality of stretching rolls 3x to 3z are disposed on the cooling drum 1. Specifically, the stretching rolls 3x are disposed at the center portion in the drum width direction at the upstream side of the cooling drum rotation direction, and the stretching rolls 3y are disposed on both sides in the drum width direction at the downstream side of the cooling drum rotating direction. 3z. The rolling range of the stretching rolls 3y and 3z in the width direction of the roll is partially overlapped with the rolling range of the stretching roll 3x in the roll width direction. According to this, by arranging the stretching rolls 3x to 3z on the upstream side and the downstream side in the rotation direction of the cooling drum, the molten slag S on the cooling drum surface can be sequentially stepwise stretched. According to the present embodiment, since the short stretching rolls 3x to 3z are less curved in the longitudinal direction, it is advantageous to make the rolling thickness of the slag in the width direction of the cooling drum uniform.

In addition, since the rest of the structure of this embodiment is the embodiment shown in FIGS. 4 to 6, the detailed description is omitted.

Fig. 8 is a schematic front view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

In the present embodiment, the tub 2 is disposed such that its front end portion abuts or is close to the drum surface 100 of the cooling drum 1, and a crucible 4 is disposed above the cooling drum 1, and the crucible 4, the drum surface 100, and the front end portion of the tub 2 are used. The slag liquid retention portion A is formed, and an opening 5 for extruding molten slag in the slag liquid retention portion A is formed between the crucible 4 and the cooling drum 1.

The present embodiment is directed to obtaining a slag solidified body having a thickness of 5 mm or more, preferably 20 mm or more. Therefore, the width (thickness) of the opening 5 is preferably set to 5 mm or more, more preferably 20 mm or more. Further, it is preferable to change the width (thickness) of the opening 5 by adjusting the position of the up and down direction of the crucible 4.

In the present embodiment, the crucible 4 is composed of a fixed body 4a (wall), and is supported by a device body (base) via an appropriate supporting member. An internal cooling mechanism (not shown) having a flow path common to the refrigerant flow may be provided inside the body 4a. In this case, a refrigerant supply unit and a refrigerant discharge unit for the internal cooling mechanism are provided. In addition, the refrigerant generally uses water (cooling water), but other fluids (liquid or gas) may also be used.

In addition, since the rest of the structure of this embodiment is the embodiment shown in FIG. 3, detailed description is abbreviate|omitted.

The cooling slag S supplied to the tub 2 flows into the slag liquid retention portion A by using the cooling treatment of the molten slag as in the above-described cooling treatment device, and after cooling for a suitable period of time, from the cooling drum 1 and Between 堰4 (堰4a) The opening 5 is extruded while cooling. The extruded molten slag S is cooled to a moderately solidified state (for example, a semi-solidified state, or a state in which only one or both surfaces are solidified) in a state of being attached to the surface of the cooling drum, as shown in FIGS. 1 to 3 . In the embodiment, the self-weight is naturally peeled off from the surface of the cooling drum at a predetermined drum rotation position.

The cooling treatment of the molten slag is accelerated by the molten slag S in the slag liquid retention portion A for a sufficient period of time to promote cooling, and is also cooled by the cooling drum 1 when being extruded from the opening 5. Even when the thick plate slag Sx is sufficiently enlarged by increasing the width (thickness) of the opening 5, the molten slag S can be appropriately cooled. Therefore, the plate-like slag Sx of the thick plate which is appropriately cooled and has a thickness of 5 mm or more can be extruded from the opening 5. According to this embodiment, it is also possible to easily manufacture a thick plate slag solidified body having a thickness of about 20 to 30 mm.

Further, in the embodiment shown in Fig. 8, when the cartridge 4a does not have a special internal cooling mechanism, the slag Sx extruded from the opening 5 is usually solidified by the lower surface and the both end faces of the side adjacent to the cooling drum 1, and The upper side is in a molten or semi-molten state, but does not pose a problem if the extruded slag Sx is in such a state of solidification.

Fig. 9 is a front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention. The cooling treatment apparatus of this embodiment is also provided with a crucible 4 on the upper portion of the cooling drum 1.

In the present embodiment, the crucible 4 is provided on the upper portion of the cooling drum 1, and the lower drum surface has a cold direction of rotation in the direction of the anti-slag liquid retention portion A. But the drum 4x is composed.

Like the cooling drum 1, an internal cooling mechanism (not shown) having a flow path for supplying a refrigerant flow is provided inside the cooling drum 4x, and a refrigerant supply unit for the internal cooling mechanism is provided at each end portion of the drum shaft. With the refrigerant discharge section. In addition, the refrigerant generally uses water (cooling water), but other fluids (liquid or gas) may also be used.

As in the embodiment shown in Fig. 8, the width (thickness) of the opening 5 is preferably set to 5 mm or more, more preferably 20 mm or more. Further, it is preferable to change the width (thickness) of the opening 5 by adjusting the position in the up and down direction of the cooling drum 4x.

Further, like the cooling drum 1, the cooling drum 4x is also rotationally driven in the above-described rotational direction by a driving device (not shown). Further, it is preferable that both the cooling drum 1 and the cooling drum 4x can control the number of rotations in accordance with the operating conditions. Further, the cooling drum 4x does not necessarily have to be located directly above the cooling drum 1, and may be displaced in the horizontal direction as in the present embodiment.

In addition, since the rest of the structure of this embodiment is the embodiment shown in FIG. 3, detailed description is abbreviate|omitted.

By using the cooling treatment of the molten slag of the above-described cooling treatment apparatus, the molten slag S is cooled by being retained in the slag liquid retention portion A for a suitable period of time, and then rolled between the cooling drum 1 and the cooling drum 4x. In the manner, it is extruded while cooling is performed from the opening 5. At this time, the molten slag is subjected to: (i) cooling for a sufficient time in the slag liquid retention portion A, and (ii) long-term contact with the cooling drum 1 and the cooling drum 4x on the entry side of the opening 5, Further, in the opening 5, the cooling roller 1 and the cooling drum 4x are used for rolling and cooling from both sides; the cooling effect is thereby more effectively promoted the cooling of the molten slag S, and the thick plate slag solidified body can be obtained more stably. .

In addition, the cooling drum 1 and the cooling drum 4x of the embodiment and the cooling drum 1 of the embodiment shown in Fig. 8 have a smooth cylindrical surface, but are not limited thereto, and may have irregularities such as grooves. . When the drum surface 100 is provided with irregularities, the contact area with the molten slag increases, and the cooling of the slag can be promoted. In addition, there is also the advantage that the solidified slag is easily broken and ground. Further, regarding the heat recovery through the refrigerant, the heat exchange efficiency is also improved because the specific surface area is large.

Further, it is also possible to form a hole-shaped opening 5 between the cooling drum 1 and the drum surface of the cooling drum 4x by using irregularities such as an annular groove formed on the drum surface 100 of the cooling drum 1, and the slag is easily squeezed by the shape of the hole. Out. Therefore, the shape of the slag Sx extruded from the opening 5 between the cooling drum 1 and the cooling drum 4x may be a line shape or a column shape other than a plate shape. Further, depending on the uneven shape of the drum surface of the cooling drum 1 or the cooling drum 4x, the opening 5 may be formed intermittently, so that the extrusion of the slag Sx may be discontinuous. In this case, the slag Sx is taken from the opening 5. Substantially extruded in a block shape.

In the embodiment shown in Figs. 8 and 9, the thickness of the slag Sx extruded from the opening 5 is defined as the maximum thickness t of the slag in the radial direction of the cooling drum shown in Fig. 8. The shape of the extruded slag Sx is other than a plate shape, and the thickness of the slag Sx according to the above definition is preferably 5 mm or more, more preferably 20 mm. the above.

In the embodiment shown in Fig. 8 and Fig. 9, the slag slag Sx extruded from the opening 5 is usually solidified only on one side or both sides, and the inside is in a molten or semi-molten state. The solidified surface layer portion which has just been extruded from the opening 5 is quenched by a cooling drum to form a vitreous or a structure close thereto, but is then heated back by the heat of the internal unsolidified slag to change to a crystalline form. Therefore, in these embodiments, a thick plate slag solidified body having less glass quality can be obtained.

10 and 11, FIG. 12 and FIG. 13, FIG. 14 and FIG. 15, FIG. 16 and FIG. 17, FIG. 18 and FIG. 19 are the openings 5 between the cooling drum 1 and the cooling drum 4x. The slag Sx is extruded in a shape other than a plate shape. Specifically, the following (1) or/and (2) are formed on the drum surface (outer peripheral surface) of the cooling drum 1 or/and the cooling drum 4x: (1) an annular groove in the circumferential direction of the drum; (2) a recessed portion that is spaced apart in the circumferential direction of the drum; by abutting the drum surface 400 of the cooling drum 4x against the drum surface 100 of the cooling drum 1, the hole shape opening 5 is formed by the above (a) or/and (ii), and The slag Sx is extruded from the hole shape opening 5.

In the embodiment shown in Fig. 10 and Fig. 11, Fig. 10 is a schematic front view showing a part of the cooling processing apparatus and the cooling processing method, and Fig. 11 is a side view. In the embodiment, the plurality of annular grooves 401 are formed at intervals in the longitudinal direction of the drum on the drum surface 400 (outer peripheral surface) of the cooling drum 4x, and the drum surface 400 of the cooling drum 4x is brought into contact with the cooling drum 1 Roller surface 100, a state in which the opening 5 of the hole shape is formed by the annular groove 401 is formed.

The rest of the structure of the present embodiment is the same as that of the embodiment shown in Figs. 3 and 9, and therefore detailed description thereof will be omitted.

In the present embodiment, the columnar slag Sx is extruded from a plurality of hole-shaped openings 5 formed by the annular groove 401.

Further, instead of the drum surface 400 of the cooling drum 4x, a plurality of annular grooves may be formed at intervals in the longitudinal direction of the drum on the drum surface 100 of the cooling drum 1, and the opening of the hole shape may be formed by the annular groove. 5.

In the embodiment shown in Fig. 12 and Fig. 13, Fig. 12 is a schematic front view showing a part of the cooling processing apparatus and the cooling processing method, and Fig. 13 is a side view. In the present embodiment, a plurality of annular grooves 101 and annular grooves 401 are formed on the drum surface 100 of the cooling drum 1 and the drum surface 400 of the cooling drum 4x at intervals in the longitudinal direction of the drum, and are cooled. The drum surface 400 of the drum 4x abuts against the drum surface 100 of the cooling drum 1, and the opposing annular groove 101 and the annular groove 401 are combined to form a hole-shaped opening 5. Further, the front end portion of the tub 2 is configured to be engaged with the axially concavo-convex shape of the cooling drum 1 (the uneven shape formed by the plurality of annular grooves 101), and the gap between the cooling drum 1 and the cooling drum 1 does not occur, or Reduce the gap as much as possible.

In the present embodiment, the columnar slag Sx is extruded from a plurality of hole-shaped openings 5 formed by the annular groove 101 and the annular groove 401.

The rest of the structure of the present embodiment is the same as that of the embodiment shown in Figs. 3 and 9, and therefore detailed description thereof will be omitted.

In the embodiment shown in Fig. 14 and Fig. 15, Fig. 14 is a schematic front view showing a part of the cooling processing apparatus and the cooling processing method, and Fig. 15 is a side view. In the present embodiment, a plurality of annular grooves 402 are formed on the drum surface 400 of the cooling drum 4x at intervals in the longitudinal direction of the drum, and the bottom surfaces of the annular grooves 402 are formed in a concave-convex shape in the circumferential direction of the drum ( In the gear shape, the annular surface 402 is formed by the annular groove 402 by abutting the drum surface 400 of the cooling drum 4x against the drum surface 100 of the cooling drum 1. In the present embodiment, the opening 5 is intermittently increased by the recessed portion on the bottom surface of the annular groove 402.

In the present embodiment, the slag Sx is extruded from a plurality of hole-shaped openings 5 formed by the annular groove 402. In the slag Sx, since the opening 5 is intermittently increased by the concave portion on the bottom surface of the annular groove 402, the block portion b is extruded in a beaded shape. The slag Sx having such a shape is separated into a block shape by its own weight after being peeled off from the cooling drum 1, or is easily separated into a block shape by a small external force.

The rest of the structure of the present embodiment is the same as that of the embodiment shown in Figs. 3 and 9, and therefore detailed description thereof will be omitted.

In addition, in Fig. 15, the illustration of the unevenness formed on the bottom surface of the annular groove 402 is omitted, and the position of the convex portion of the bottom surface is indicated by an imaginary line.

Further, instead of the annular groove 402 of the embodiment shown in Figs. 14 and 15, the groove or the hole-shaped recess may be formed at intervals in the circumferential direction of the drum. In this case, the opening is intermittently formed by the recess. 5, and from the opening 5 Extrusion of the massive slag Sx.

Further, instead of the drum surface 400 of the cooling drum 4x, a plurality of annular grooves may be formed on the drum surface 100 of the cooling drum 1 at intervals in the longitudinal direction of the drum (or as described above in the circumferential direction of the drum) A groove-shaped or hole-shaped recess is formed at intervals, and a hole-shaped opening 5 is formed by the annular groove or the like.

In the embodiment of Fig. 16 and Fig. 17, Fig. 16 is a schematic front view showing a part of the cooling processing apparatus and the cooling processing method, and Fig. 17 is a side view. In the present embodiment, a plurality of annular grooves 102 and annular grooves 403 are formed on the drum surface 100 of the cooling drum 1 and the drum surface 400 of the cooling drum 4x so as to be spaced apart from each other in the longitudinal direction of the drum. The annular groove 102 and the bottom surface of the annular groove 403 are formed in a concave-convex shape (gear shape) in the circumferential direction of the drum, and the drum surface 400 of the cooling drum 4x is brought into contact with the drum surface 100 of the cooling drum 1 so as to face each other. The annular groove 102 is combined with the annular groove 403 to form a hole 5 having a hole shape. In the present embodiment, the opening 5 is intermittently enlarged by making the annular groove 102 and the bottom surface concave portions of the annular groove 403 compatible with each other.

Further, the front end portion of the tub 2 is configured to be in a shape in which the concave and convex shape (the uneven shape formed by the plurality of annular grooves 102) in the axial direction of the cooling drum 1 is meshed, and no gap is formed between the cooling drum 1 and the cooling drum 1 Or narrow the gap as much as possible.

The rest of the structure of the present embodiment is the same as that of the embodiment shown in Figs. 3 and 9, and therefore detailed description thereof will be omitted.

In the present embodiment, the annular groove 102 and the annular groove 403 are combined to form The slag Sx is extruded in the plurality of pore-shaped openings 5. The slag Sx is formed by the annular groove 102 and the concave portions of the respective bottom surfaces of the annular groove 403 being joined to each other, and the openings 5 are intermittently enlarged, so that the block portions b are extruded in a bead-like shape. The slag Sx having such a shape is separated into a block shape by its own weight after being peeled off from the cooling drum 1, or can be easily separated into a block shape by a small external force.

In addition, in FIGS. 16 and 17, the unevenness formed on the bottom surface of the annular groove 102 and the annular groove 403 is omitted, but the position of the convex portion of the bottom surface is indicated by an imaginary line.

Further, instead of the annular groove 102 and the annular groove 403 according to the present embodiment, a groove-shaped or hole-shaped recess may be formed at intervals in the circumferential direction of the drum. In this case, the opening 5 is intermittently formed by the recess. And extruding the slag slag Sx from the opening 5.

In the embodiment of Fig. 18 and Fig. 19, Fig. 18 is a schematic front view showing a part of the cooling processing apparatus and the cooling processing method, and Fig. 19 is a side view. In the present embodiment, a concave portion 103 and a concave portion 404 having a cross-sectional arc shape (hemispherical shape) are formed in the drum surface 100 of the cooling drum 1 and the drum surface 400 of the cooling drum 4x, respectively, and the drum surface 400 of the cooling drum 4x is formed. When the roller surface 100 of the cooling drum 1 is abutted, the opposing concave portion 103 and the concave portion 404 can be brought into contact with each other to form the opening 5 intermittently.

The rest of the structure of the present embodiment is the same as that of the embodiment shown in Figs. 3 and 9, and therefore detailed description thereof will be omitted.

In the present embodiment, the transmission is intermittent by the concave portion 103 and the concave portion 404. The plurality of openings 5 formed by the formation, extruding the massive slag Sx.

Further, in the cooling drum 1 and the cooling drum 4x, the drum surface of any of the cooling drums may be configured to be smooth, and the concave portion (the recess 103 or the recess 404) may be formed only on the drum surface of the other cooling drum.

The slag Sx obtained in each of the above-described embodiments of FIGS. 10 to 19 may be any of the following cases: (a) the slag Sx which has just been extruded from the opening 5 can be easily crushed or the like. It is easily processed into a block slag; (b) after being extruded from the opening 5, it is separated into a block by its own weight, or is easily separated into a block shape by a small external force; (c) extruded from the opening 5 in a block shape Therefore, the slag of the slag is extremely easy. Therefore, in the heat recovery by the refrigerant, since the specific surface area of the slag is large, the heat exchange efficiency is improved, and efficient heat recovery can be performed. In addition, it also has the advantage of not requiring or reducing the slag breaking and grinding process in the subsequent steps.

The method of processing the slag Sx which has just been extruded from the opening 5 into a block slag can be crushed by a crushing device such as a crusher, or can be cut by a shearing device.

In the cooling treatment apparatus of the present invention, it is preferable that the molten slag S adheres in a layer form on the drum surface 100 of the cooling drum 1 that is rotating, and in this state, it is necessary to perform the period in which the cooling drum 1 is rotated only by an appropriate rotation angle. Cooling.

Further, since the molten slag S contacts the cooling drum 1 and is cooled to at least the surface to form a solidified layer, the number of rotations of the cooling drum 1 is preferably about 2 to 20 rpm, more preferably about 2 to 10 rpm. In this case, cooling the drum 1 The circumferential speed of the drum surface varies depending on the diameter of the cooling drum 1, and is preferably, for example, 0.1 to 2 m/sec, more preferably about 0.1 to 1 m/sec. If the rotational speed of the cooling drum 1 exceeds the above range, the molten slag is less likely to contact/attach to the drum surface 100. Even if the circumferential speed of the drum surface 100 exceeds 5 m/sec, when the slag is melted by blast furnace slag or the like due to the force received from the drum, it may be broken and finely granulated to form a fibrous shape, which is disadvantageous. The quality of slag products. On the other hand, when the rotation speed of the cooling drum 1 is less than the above range, the amount of treatment is reduced, which is disadvantageous for a large amount of processing of the slag. In particular, when the slag which is easily amorphized by the quenching operation, such as the blast furnace slag, the thickness of the solidified layer becomes thick, and the semi-solidified portion disappears or almost disappears, the roll cooling treatment is terminated, and thus the occurrence of the slag is hardly occurred. The heat is recovered after the roller passes. Therefore, the amorphous layer generated in the surface layer in contact with the roll cannot be eliminated, resulting in a decrease in hygroscopicity, and the sharp state of the surface amorphous phase characteristic is disadvantageous to the quality of the slag product. Further, when the solidified state slag having no semi-solidified layer is subjected to rolling treatment by a stretching roll or the like, it is preferable to avoid the occurrence of slag stuck in the unevenness of the roll. In the case of sensible heat recovery of the slag, the proportion of heat dissipation to the rolls is also increased. Therefore, it is preferable to avoid the reduction of the heat recovery efficiency (usually using the cooling of the cooling water, the temperature of the cooling water is set to about 5). °C ~ 10 °C or so, it is difficult to recover from cooling water).

Fig. 26 is a view showing an example of the relationship between the number of rotations of the cooling drum 1 and the amount of slag treatment in the cooling treatment apparatus of the present invention.

Next, various embodiments that can be applied in common to the above embodiments are Line description.

In order to cool the cooling drum 1, instead of providing an internal cooling mechanism as described above in the cooling drum, or in addition to such an internal cooling mechanism, a drum cooling for blowing the cooling fluid toward the lower drum surface of the cooling drum 1 may be provided. means. This cooling means can be constituted, for example, by a nozzle that blows a cooling fluid such as water or air toward the lower drum surface of the cooling drum 1.

Further, in the cooling treatment apparatus having the cooling drum 4x, instead of or in addition to the internal cooling mechanism in the cooling drum 4x, the drum surface facing the cooling drum 4x may be blown off. A drum cooling means for cooling fluid. The cooling means may be configured by, for example, a nozzle that blows a cooling fluid such as water or air toward the drum surface of the cooling drum 4x.

Further, a slag Sx that is peeled off from the cooling drum 1 may be provided, and as shown in FIG. 1, a cooling means 7 that performs cooling between the cooling drum 1 and the conveyance belt 8 or on the conveyance belt 8 may be provided. The cooling means 7 is constituted by, for example, a nozzle that blows the slag Sx against a cooling fluid such as water or air.

The cooling treatment device having the slag liquid retention portion A is provided with a fluid supply means for blowing a fluid into the slag liquid retention portion A, and for example, (a) the molten slag temperature in the slag liquid retention portion A For the purpose of adjusting, (b) slag upgrading, and (c) sensible heat recovery of the molten slag, a fluid such as a gas may be supplied to the slag liquid from the fluid supply means. In addition, irrespective of the purpose of (a) to (c), if a fluid such as a gas is blown into the slag liquid retention portion A and melted The slag bath is stirred to promote the cooling of the slag.

Fig. 20 is a front elevational view showing an embodiment of a cooling treatment device and a cooling treatment method in this case. In the present embodiment, the fluid blowing means 6 is provided at the bottom of the front end portion of the tub 2 constituting the slag liquid retention portion A, and the fluid is blown from the fluid blowing means 6 into the slag liquid retention portion A. This fluid blowing means 6 is constituted by, for example, a gas injection nozzle or the like.

The rest of the structure of the present embodiment is the same as that of the embodiment shown in Figs. 3 and 9, and therefore detailed description thereof will be omitted.

In the method of supplying the fluid to the slag liquid retention portion A, in addition to the above embodiment, for example, the fluid supply means 6 may be provided on the side wall 200 of the tub 2, and the liquid supply means 6 may be retained toward the slag liquid. A method of supplying a fluid in the portion A; and a method of blowing a fluid into the slag liquid retention portion A by the fluid blowing means 6 from above the slag liquid retention portion A.

The flow system supplied to the slag liquid retention portion A is, for example, air, oxidizing air, oxygen, nitrogen, carbonic acid gas, water vapor, natural gas, city gas, propane gas, coke oven gas, other process gases, etc. One or more of these types are used.

The temperature adjustment of the molten slag of the above (a) is usually such that the temperature of the molten slag is lowered by the supply of the fluid. The flow system can use, for example, air, nitrogen, water vapor, or the like.

With respect to the slag upgrading of the above (b), for example, in order to reduce the amount of f-CaO in the slag, oxygen or an oxygen-containing gas such as air, oxidizing air, oxygen or the like can be used. If such a gas is supplied to the molten slag, FeO in the slag is oxidized, and it is bonded to f-CaO to form 2CaO‧Fe ₂ O ₃ , so the amount of f-CaO in the slag is lowered. When the obtained slag solidified body is used for a road bed material or the like, hydration expansion can be suppressed.

On the other hand, when it is desired to obtain a slag having a large internal pore ratio, air or nitrogen gas may be supplied to the slag liquid retention portion A, and the operating conditions (for example, increasing the rotational speed of the cooling drum 1 and the cooling drum 4x) may be adjusted. The molten slag S is extruded from the opening 5 in a gas-containing state. Thereby, the supplied gas is blocked in the slag, and a slag solidified body having a large internal pore ratio can be obtained. Since such slag has high water absorption, it is particularly suitable for use in road bed materials and the like.

The sensible heat recovery of the molten slag of the above (c) is to recover a fluid supplied as described later, and heat recovery is performed from the fluid. The flow system can use, for example, air, nitrogen, water vapor, or the like.

Further, by supplying water vapor (water) and a gas containing a hydrocarbon component such as natural gas or coke oven gas to the slag liquid retention portion A, a steam reforming reaction is generated, because the reform The endothermic heat of the mass reaction supplies the sensible heat of the slag, thereby promoting the cooling of the molten slag, and recovering the gas (hydrogen-rich gas) generated by the reaction as a combustible gas or heat recovery. When a hydrocarbon-based component gas system uses, for example, a methane gas, a reaction of CH ₄ + H ₂ O → CO + 3H ₂ occurs.

Further, the supply of the fluid in the slag liquid retention A can also be applied to the embodiment shown in Fig. 3 in which the crucible 4 is not provided.

Further, in the cooling treatment apparatus having the slag liquid retention portion A, the temperature of the molten slag in (a) the slag liquid retention portion A is adjusted, (b) the slag is modified, and (c) the slag is broken. In the case where the slag powder produced by the pulverization treatment is reused to increase one or more of the product yields, the powder may be added to the molten slag in the slag liquid retention portion A. The powder system may be, for example, slag powder, strontium sand, fly ash (coal ash), brick scrap, iron oxide powder, coal dust, sludge, iron ore fine powder, etc., and one or more of these may be used.

The temperature adjustment of the molten slag of the above (a) is such that the temperature of the molten slag is lowered by the addition of the powder. The following effects can be expected by the temperature adjustment by the addition of such a powder (particularly, the addition of the powdery slag (slag powder)).

By adding the molten slag, for example, the powdery slag by a mass ratio of about 1% to 50%, the slag temperature can be drastically lowered to promote solidification. In particular, when the product slag having a large slag thickness is rapidly cooled to the inside and a high-quality slag product is to be obtained, the cooling and solidification inside the slag can be effectively promoted. When the amount added exceeds 50%, the slag temperature is excessively lowered and it is easy to agglomerate, so that adjustment of the cooling rate is difficult, and adjustment of shape and thickness is also difficult. On the other hand, if the amount of addition is less than 1%, the adjustment of the slag temperature is substantially difficult. Further, when sensible heat recovery is performed from the solid state slag subjected to the treatment by the cooling treatment apparatus of the present invention, since the amount of slag is increased, the surface temperature of the solid slag can be reduced from the internal temperature difference, so that heat recovery can be efficiently performed. . Further, since the cooling and solidification of the molten slag is promoted, the heat load and thermal fatigue of the cooling drum 1 or the stretching rolls 3 and the like can be reduced.

The slag modification of the above (b) is carried out by adding an iron oxide source such as an SiO ₂ source such as cerium or fly ash, a source of Al ₂ O ₃ such as high-oxygen bricks, an iron oxide powder or an iron ore powder. The molten slag is melted to lower the amount of f-CaO in the slag, and the hydration expansion of the obtained slag solidified body when used for a road bed material or the like can be suppressed.

In relation to the above (c), if the slag powder produced by the crushing treatment and/or the grinding treatment of the slag cooled by the method of the present invention is added, the product yield can be improved.

Further, the addition of the powder of the molten slag in the slag liquid retention A can also be applied to the embodiment shown in Fig. 3 in which the crucible 4 is not provided.

In the practice of the present invention, it is particularly preferable to efficiently recover the sensible heat of the molten slag from the viewpoint of energy saving and reduction of CO ₂ emission. The sensible heat recovery of the molten slag is preferably carried out by heat recovery of at least one of the following (i) to (iv), more preferably two or more, and particularly preferably all.

(i) Heat recovery from the refrigerant passing through the inside of the cooling drum 1.

(ii) In the cooling treatment in which the molten slag is performed using the cooling treatment apparatus having the crucible 4 (in the case where the cooling drum 4x is included), heat is recovered from the refrigerant passing through the inside of the crucible 4.

(iii) The slag cooled by the cooling drum 1 is further cooled by contact with a refrigerant (for example, steam, water, air, etc.), and heat is recovered by recovering the refrigerant. In this method, after the refrigerant is brought into contact with the slag in the closed space, the refrigerant exchanged with the slag is recovered. For example, (a) the slag cooled by the cooling drum 1 is used, and the conveying means is used. (b) a method of performing heat recovery from the refrigerant while being transported, and (b) cooling the slag cooled by the cooling drum 1 by cooling the container or the cooling device supplied with the refrigerant, and cooling the refrigerant from the refrigerant Various methods such as a method of performing heat recovery.

(iv) In the cooling treatment for performing the molten slag by using the cooling treatment device having the slag liquid retention portion A, when the fluid is blown into the molten slag in the slag liquid retention portion A, the blown air The fluid is recovered and heat recovered from the fluid.

In the above forms (i) and (ii), heat is recovered from the refrigerant passing through the internal cooling mechanism of the cooling drum 1 or the crucible 4 (preferably the cooling drum 4x).

In the aspect (a) of the above (iii), for example, the conveyance belt 8 of each of the above-described embodiments is covered with a tunnel, and the slag is cooled by circulating a refrigerant inside the tunnel, and the slag is cooled from the refrigerant. Heat recovery.

In the form (b) of the above (iii), for example, in the cooling container to which the refrigerant is supplied, the slag is stored and cooled, and heat is recovered from the refrigerant. For the cooling container, for example, the slag bucket 9 of each of the above-described embodiments can be used, and heat can be recovered from the refrigerant passing through the cooling container. Further, slag may be placed in a cooling device such as a screw feeder or a rotary kiln, and the slag may be cooled by supplying a refrigerant such as air inside, and heat may be recovered from the refrigerant.

In the embodiment (iv), for example, a cover for fluid recovery or the like is provided above the cooling drum 1, and the fluid having passed through the molten slag S of the slag retention unit A is recovered, and heat is recovered from the fluid. .

In any of the above (i) to (iv), heat recovery is performed from a refrigerant or a gas in a heat recovery facility (not shown). The heat to be recovered can be used as various heat sources such as a heat source for drying a raw material, a heat source for steam for fuel drying, and the like.

In the aspect (b) of the above (iii), the slag cooled by the cooling container or the cooling device is preferably reduced in size from a level of efficiency of sensible heat recovery, and from this point, it is preferable. The cooling treatment was carried out in the embodiment of Figs. 10 to 19 exemplified above.

Fig. 21 is a schematic front view showing an embodiment of a cooling treatment method according to the above (iii) aspect. In the present embodiment, a cooling treatment device similar to that of the embodiment shown in Figs. 14 and 15 is used, and the slag slag Sx or the slag Sx which can be easily separated into a block shape is extruded from the device. The slag Sx is further subjected to a crushing treatment by a crushing device 13 such as a crusher, and then loaded into the sealed cooling container 14 by the transport conveyor 8 . The temperature of the slag Sx charged in the cooling container 14 is usually 700 to 1000 °C. The pressurized air as the refrigerant is blown into the cooling container 14, and the slag Sx is cooled. The heated air (hot air) heated by the sensible heat of the slag Sx is discharged outside the cooling container 14, and is heat-recovered by an appropriate heat exchange means. The slag Sx cooled to an appropriate temperature is taken out from the cooling container 14 and sent to a necessary processing step.

In addition, since the rest of the device structure and the cooling processing form are the same as those shown in FIGS. 3, 9, 14, and 15, the detailed description is omitted.

Figure 22 is another example of the cooling treatment method related to the above (iii) aspect. A schematic front view of an embodiment. In the case of using the hermetic cooling container 14 shown in Fig. 21, it is necessary to keep the slag and the refrigerant in the container for a certain period of time. When the cooling container 14 is only one seat, there is a problem in processing efficiency. In the embodiment of Fig. 22, the plurality of cooling containers 14a to 14c are provided, and the cooling containers 14a to 14c are sequentially circulated (slag loading → heat recovery → slag discharge). , you can perform efficient processing.

In addition, since the rest of the apparatus structure and the cooling processing form are the same as those shown in FIG. 21, detailed description is omitted.

Fig. 23 is a schematic front view showing another embodiment of the cooling treatment method of the above aspect (iii). In the present embodiment, when slag transfer is performed by the screw feeder 15 of the cooling device, the slag is cooled by supplying pressurized air as a refrigerant to the inside. The pressurized air is supplied from the outlet side of the screw feeder 15 toward the inlet side. The air that has flowed through the screw feeder 15 and cools the slag is taken out of the machine and heat-recovered by an appropriate heat exchange means.

In addition, since the rest of the apparatus structure and the cooling processing form are the same as those shown in FIG. 21, detailed description is omitted.

Fig. 24 is a schematic front view showing another embodiment of the cooling treatment method of the above aspect (iii). In the present embodiment, the slag Sx which is cooled and discharged by the apparatus (for example, the slag conveyed by the transport conveyor 8) is used in a cooling processing apparatus similar to that of the embodiment shown in FIG. 4 to FIG. Sx) Further, the slag which is cooled on the drum surface 100 or the roll surface of the stretching roll 3 is supplied (sprayed) with a refrigerant such as mist (water + compressed air) from the refrigerant supply means 16, and is cooled. Further, in the present embodiment, a refrigerant such as mist (water + compressed air) is supplied (sprayed) from the refrigerant supply means 16a to the lower surface of the cooling drum 1, and the drum surface 100 is cooled. In addition to the mist, the refrigerant can be sprayed with water or the like.

The equipment on the outlet side of the apparatus, such as the cooling treatment device and the refrigerant supply means 16, 16a, is covered by the lid body 17, and the lid body 17 is connected to the exhaust pipe 18. A heat exchanger 19 is provided in the exhaust pipe 18.

In addition, the slag which is easily amorphized by quenching as in the blast furnace slag is cooled by the drum, and the amorphous phase of the slag surface layer formed at the contact portion of the drum is used as a half from the inside of the slag. The reheating supplied from the solidified portion, after the disappearance of the amorphous phase, is cooled by the mist to form a state in which the amorphous phase is not formed and the entire slag is appropriately cooled. Although not shown in the drawings, by providing a radiation thermometer or the like, the surface temperature of the slag can be grasped, and the cooling rate by fog cooling or the like can be adjusted, and a high-quality slag product having suppressed powdering property and swelling property can be obtained. .

The vapor generated by the contact between the refrigerant and the slag in the lid body 17 and the heated gas (hereinafter referred to as "exhaust gas") are recovered by the exhaust pipe 18, and the heat medium 19 is used together with the heat medium. Heat exchange is performed to recover the sensible heat of the slag. For example, if water is used as the heat medium, steam can be obtained by heat exchange with the exhaust gas. A gas thermometer 20 is disposed in the exhaust pipe 18, and the row is measured Gas temperature. The control device 21 controls the amount of refrigerant supplied from the refrigerant supply means 16 in accordance with the exhaust gas temperature measurement by the gas thermometer 20 and the required exhaust gas temperature (for example, in the refrigerant) The case of fog is the amount of mist or the ratio of gas to water, and in the case of spraying water, the amount of water, etc.).

In addition, in general, the cooling drum 1 is cooled by circulating cooling water in the refrigerant flow path, but steam may be used as a slave from a part of the cooling water passing through the cooling drum 1 or a part of the cooling water. At least a part of the refrigerant (vapor, water) supplied from the refrigerant supply means 16 can thereby improve the sensible heat recovery of the slag.

Further, the heat exchanger 19 may not be provided in the exhaust pipe 18, but the exhaust gas may be directly used as any one of the heat sources. The slag Sx cooled to an appropriate temperature is supplied to the necessary processing steps to become a product slag. At this time, although slag powder (micronized slag) is generated, the slag powder may be added to the molten slag in which the slag liquid is retained in A, and the temperature of the molten slag may be adjusted. 22 in the figure refers to a slag powder supply device for performing such a step.

In addition, since the rest of the apparatus structure and the cooling processing form are the same as those of the embodiment shown in FIG. 3 and FIG. 4 to FIG. 6, detailed description is omitted.

In the embodiment of Figs. 20 to 24 described above, the cooling processing apparatus may use any of the embodiments of Figs. 1 to 19 .

In the cooling treatment method of the above (iv), for example, the upper space of the slag liquid retention portion A is covered with a gas recovery cover, and the cover is connected to the gas. The discharge pipe transports the gas rising from the slag liquid retention portion A to the appropriate gas recovery system by the cover and the gas discharge pipe. In addition, in the present embodiment, water vapor (water) and a hydrocarbon-containing component gas such as natural gas or coke oven gas are supplied to the slag liquid retention A at the same time as described above.

Further, when the embodiment having the crucible 4 is carried out, since the slag liquid retention portion A is not yet formed at the time of starting the operation, it is first necessary to supply the molten slag S to form the slag liquid retention portion A. Therefore, for example, in the embodiment of Fig. 8 and Fig. 9, the operation is started when the lower cooling drum 1 and the upper crucible 4 (the cooling drum 4x in Fig. 9) are spaced apart (the width of the opening 5) in a narrow state or in a closed state. At this time, in order to easily generate the slag liquid retention A, operations such as reducing the number of rotations of the cooling drum 1 may be performed.

After the predetermined slag liquid retention A is formed, by adjusting the above-described interval (opening 5 width) to a predetermined distance, the thick slag Sx can be stably obtained.

On the other hand, for example, in the embodiment of FIGS. 10 to 13 , since the opening 5 cannot be narrowed or closed, the supply amount of the molten slag S to the cooling treatment device is adjusted at the initial stage of operation (ie, the supply is relatively open). When a larger amount of molten slag S) is extruded in 5, the slag liquid retention portion A can be quickly formed.

In addition, when there is a liquid level detecting means for setting the slag liquid retention A, when the molten slag receiving amount is changed, the cooling drum 1 is changed so that the liquid level of the slag liquid retention A is kept constant. The number of rotations can stably obtain a certain thickness of slag Sx.

Generally, the stretching rolls 3 provided in the cooling treatment apparatus such as FIG. 4 to FIG. 6 also have There is an internal cooling mechanism. Fig. 25 is a schematic cross-sectional view showing an embodiment of an internal cooling mechanism. The drawing roller 3 is provided with a refrigerant flow path 30 therein, and refrigerant passages 40a and 40b are provided along the axial direction of the roller shafts 31a and 31b.

In the present embodiment, only the inside of the stretching roll 3 is formed to be hollow, and the hollow portion is used as the refrigerant flow path 30, and the refrigerant passages 30 are connected to the refrigerant passages 31a and 31b at both ends. The reason for this configuration is as follows. The slag cooling treatment device is not suitable for the recovery of the sensible heat of the slag via the refrigerant. In this case, one of the slag cooling and the heat recovery mode, the slag cooling can be considered by utilizing the latent heat of evaporation of the cooling water flowing through the refrigerant flow path. And recover the vapor from the refrigerant flow path. In the present embodiment, the inside of the roll is formed such that the inside of the roll is hollow to form the refrigerant flow path 30, and the internal cooling water is heated and boiled. And produce hot water convection. Therefore, the cooling water introduced into the refrigerant flow path 30 from the refrigerant passage 31a does not immediately flow out of the refrigerant passage 31b, but is appropriately retained in the refrigerant flow passage 30 by the above-described hot water convection, and functions as a refrigerant. By using this latent heat of vaporization, a high cooling effect can be obtained with less cooling water. On the other hand, the vapor generated in the refrigerant flow path 30 can be easily separated and collected in the refrigerant circulation path after being discharged from the refrigerant flow path 30.

The method for producing a slag product according to the present invention is cooled by the cooling treatment method of the present invention, and the solidified slag is subjected to crushing treatment and/or grinding treatment, and if necessary, sieving or the like is carried out by using the granules to obtain granules. Slag products. this In the invention, a slag product having a particle diameter of 5 mm or more can be easily produced, and in particular, a slag product having a particle diameter of 20 to 30 mm can be easily produced. The type of the slag product is not limited, and can generally be used as a slag product for road bed materials, coarse aggregates, fine aggregates, marine civil materials, and the like, and is particularly suitable for road bed materials and coarse aggregates.

Since the slag product obtained by the present invention is produced by quenching, the pulverization is suppressed, so that the fine powder portion can be reduced, and when it is used as the marine soil, the seawater is not clouded. Further, since the solidification is rapidly cooled to a layer shape close to the target particle size, the crushing step can be simplified, and coarse aggregates and fine aggregates having less fine particles can be formed. Further, since the dense material is formed, the water absorption rate is low, and it can be used as a hard material for the asphalt. Further, by performing slag upgrading, free CaO can be reduced, and aging can be easily performed. Even if vapor aging is not used, expansion can be suppressed by atmospheric aging, and thus it can be utilized as a road bed material.

(industrial availability)

According to the cooling treatment device and the cooling treatment method of the molten slag according to the present invention, since the cooled slag which is peeled off from the drum surface (100) of the single horizontal cooling drum (1) is discharged in one direction, the cooling process is completed. Disposal of slag, post-treatment, etc. are relatively easy, and equipment costs can also be reduced. In particular, when the sensible heat recovery of the treated slag is performed, if the conventional double drum type slag cooling treatment device is used, the cooled slag discharged in the forward and reverse directions is to be subjected to one heat recovery device. Processing, in the opposite direction 2 paths are integrated into 1 In the process, the slag temperature is lowered, and efficient heat recovery cannot be performed. On the other hand, in the present invention, since the slag which is cooled and processed is discharged in one direction, heat recovery can be efficiently performed.

Further, since the molten slag is poured into the horizontal cooling drum (1) via the tub (2), the falling load of the molten slag is not applied to the horizontal cooling drum (1), or the falling load can be sufficiently reduced. Therefore, even in the case of a large-scale processing apparatus, the molten slag can be processed in a large amount without using a tundish. Further, by selecting the shape of the tub, the molten slag can be expanded toward the width direction of the drum, and the molten slag can be uniformly cooled on the drum surface (100).

Further, according to the cooling treatment device using the slag liquid retention portion (A) formed by the tub (2) and the drum surface (100), and the cooling treatment method using the molten slag using the device, the fusion melting can be effectively promoted. The slag is cooled, so that even if the slag has a small viscosity, the thickness of the slag adhering to the drum surface (100) can be ensured, and the slag solidified body can be obtained.

Further, according to the cooling treatment device having the stretching roller (3) and the cooling treatment method using the molten slag using the device, the stretching roller (3) performs the molten slag attached to the drum surface (100). Rolling and stretching in the width direction of the drum, so that the molten slag having a high alkalinity and viscosity can be cooled by high cooling efficiency, and the slag solidified body can be obtained with high productivity. Further, since the molten slag can be cooled at a high cooling rate, a slag solidified body which is not easily pulverized can be obtained especially for the slag having a high alkalinity.

Furthermore, according to the cooling treatment device having the crucible (4), and the use of the same The cooling treatment method of the molten slag can form a large slag liquid retention portion (A) by using the crucible (4), the drum surface (100), and the barrel (2), and can be extended in the slag liquid retention portion ( The molten slag retention time in A) is thus particularly effective in promoting the cooling of the molten slag, and the appropriately cooled slag can be extruded from the opening (5). Therefore, by sufficiently increasing the width of the opening (5) (thickness of the extruded slag), a slag solidified body of a thick plate can be obtained.

Further, by forming the crucible (4) as a cooling drum (4x) having a rotation direction in which the lower outer peripheral surface is rotated in the direction of the anti-slag liquid retention portion (A), the cooling of the molten slag can be more effectively promoted.俾 The solidified slag solidified body can be obtained more stably.

Further, according to the method for producing a slag product of the present invention, by using the above-described cooling treatment method, a slag product having a desired particle size can be produced at low cost and stably.

1‧‧‧Horizontal cooling drum

1, 4x‧‧‧ Cooling roller

2‧‧‧ barrel

3, 3x, 3y, 3z‧‧‧ stretching rolls

4‧‧‧堰

4a‧‧‧ body

5‧‧‧ openings

6‧‧‧Fluid supply means, fluid blowing means

7‧‧‧cooling means

8‧‧‧Transport conveyor belt

9‧‧‧ slag bucket

10‧‧‧ gas injection means

11‧‧‧Support arm

13‧‧‧Crushing device

14, 14a, 14b, 14c‧‧‧cooling containers

15‧‧‧Spiral feeder

16, 16a‧‧‧ refrigerant supply means

17‧‧‧ Cover

18‧‧‧Exhaust pipe

19‧‧‧ heat exchanger

20‧‧‧ gas thermometer

21‧‧‧Control device

22‧‧‧(slag powder) supply device

30‧‧‧Refrigerant flow path

31a, 31b‧‧‧ Roller

40a, 40b‧‧‧ refrigerant passage

100,400‧‧‧ Roller surface

101, 102‧‧ ‧ annular groove

103, 404‧‧‧ recess

110‧‧‧ bearing hole

200‧‧‧ side wall

300‧‧‧ outer perimeter

301‧‧‧ Roller

401, 402, 403‧‧ ‧ annular groove

A‧‧‧ slag liquid retention

S‧‧‧melting slag

Sx‧‧‧ slag

T‧‧‧ interval

Fig. 1 is a schematic front view showing an embodiment of a cooling treatment device and a cooling treatment method for molten slag according to the present invention.

Fig. 2 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 3 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 4 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Figure 5 is a plan view of the embodiment shown in Figure 4.

Fig. 6 is an explanatory view of the action of a stretching roll provided with a cooling drum in the embodiment shown in Fig. 4.

Fig. 7 is a schematic plan view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 8 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 9 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 10 is a schematic front elevational view showing a part of another embodiment of a cooling treatment device and a cooling treatment method for molten slag according to the present invention.

Figure 11 is a schematic side elevational view of a portion of the embodiment of Figure 10.

Fig. 12 is a schematic front elevational view showing a part of another embodiment of a cooling treatment device and a cooling treatment method for molten slag according to the present invention.

Figure 13 is a schematic side elevational view of a portion of the embodiment of Figure 12;

Fig. 14 is a schematic front elevational view showing a part of another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Figure 15 is a schematic side elevational view of a portion of the embodiment of Figure 14.

Fig. 16 is a schematic front view showing a part of another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Figure 17 is a schematic side elevational view of a portion of the embodiment of Figure 16;

Fig. 18 is a schematic front view showing a part of another embodiment of a cooling treatment device and a cooling treatment method for molten slag according to the present invention.

Figure 19 is a schematic side elevational view of a portion of the embodiment of Figure 18.

Fig. 20 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 21 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 22 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 23 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 24 is a schematic front elevational view showing another embodiment of a cooling treatment apparatus and a cooling treatment method for molten slag according to the present invention.

Fig. 25 is a schematic cross-sectional view showing an embodiment of an internal cooling mechanism used in the stretching rolls shown in Figs. 4 to 6 and the like.

Figure 26 is a graph showing the relationship between the number of rotations of the cooling drum and the amount of slag treatment in the apparatus of the present invention.

1‧‧‧Horizontal cooling drum

2‧‧‧ barrel

7‧‧‧cooling means

8‧‧‧Transport conveyor belt

9‧‧‧ slag bucket

100‧‧‧ Roller surface

Sx‧‧‧ slag

Claims (11)

A cooling treatment device for melting slag, characterized in that the molten slag is attached to the front side of the tub (2) adjacent to or close to the drum surface (100) of the horizontal cooling drum (1) a peripheral roller surface (100) and cooled, and a rotatable single horizontal cooling drum (1), and a barrel (2) for supplying molten slag to the horizontal cooling drum (1); 2) forming a slag liquid retention portion (A) with the horizontal cooling drum (1); and the molten slag in the slag liquid retention portion (A) adheres to the rotation of the horizontal cooling drum (1) After being taken out on the drum surface (100), it is peeled off from the drum surface (100) and discharged in one direction. A cooling treatment apparatus for molten slag according to claim 1, wherein the molten slag attached to the drum surface (100) of the horizontal cooling drum (1) is rolled and oriented toward the drum width Stretching roller (3) in the direction of stretching. A cooling treatment device for molten slag according to claim 1 or 2, wherein a gas injection means (10) is provided below the barrel (2), and a front end portion and a drum surface of the barrel (2) are provided. The gap portion of (100) is sprayed with a forced gas to prevent the molten slag from leaking. A cooling treatment apparatus for melting slag according to claim 1 or 2, further comprising a fluid supply means (6) for blowing a fluid into the slag liquid retention portion (A). A cooling treatment apparatus for melting slag according to claim 1 or 2, wherein there is a drum surface (100) for cooling the drum (1) from the horizontal direction The stripped slag is subjected to cooling means (7) for cooling. A method for cooling a molten slag, which is subjected to a cooling treatment using a cooling treatment apparatus according to any one of claims 1 to 5. For the cooling treatment method of the molten slag according to item 6 of the patent application, the slag basicity [mass ratio: %CaO/%SiO ₂ ] is 2 or more, using a cooling treatment apparatus having a stretching roll (3). The molten slag is treated as a treatment object, and the molten slag adhering to the drum surface (100) is rolled by the stretching roll (3) to be stretched in the drum width direction. The method for cooling a molten slag according to claim 6 or 7, which is a molten slag in a slag liquid retention portion (A) using a cooling treatment device having a slag liquid retention portion (A) Add powder to it. The cooling treatment method of the molten slag according to the sixth or seventh aspect of the patent application is the use of the cooling treatment device having the slag liquid retention portion (A) in the molten slag in the slag liquid retention portion (A) Blow in the fluid. The method for cooling a molten slag according to claim 6 or 7 is to perform heat recovery of at least one of the following (i) to (iv): (i) from the inside of the horizontal cooling drum (1) The refrigerant is subjected to heat recovery; (ii) in the cooling treatment using the molten slag having the enthalpy (4) cooling treatment device, heat recovery is performed from the refrigerant passing through the ruthenium (4); (iii) The slag cooled by the cooling drum (1) is further cooled by contact with the refrigerant, and heat recovery is performed from the refrigerant; (iv) in the cooling treatment of the molten slag using the cooling treatment device having the slag liquid retention portion (A), when the fluid is blown into the molten slag in the slag liquid retention portion (A), The blown fluid is recovered and heat recovery is performed from the fluid. A method for producing a slag product, which is obtained by cooling and solidifying a slag which is cooled by a cooling treatment method according to any one of claims 6 to 10, and is subjected to a crushing treatment and/or a grinding treatment to obtain a granular melting. Slag products.