JP6244920B2 - Method and apparatus for heating and drying cement-containing molded product - Google Patents

Description

  The present invention relates to a method and an apparatus for heating / drying a cement-containing molded product that achieves early manifestation of strength of the molded product when kneading, molding, and agglomerating fine ore, other raw materials, and cement.

  Conventionally, a method of agglomerating fine ore by firing or sintering is known. On the other hand, a method has been proposed in which cement, fine ore and other raw materials are kneaded, molded, and agglomerated (for example, see Non-Patent Document 1).

The method of kneading, molding and agglomerating fine ore, other raw materials, and cement is superior in terms of energy saving compared to the method of agglomerating by firing and sintering, and there are no exhaust gas problems. This is an environmentally preferable method. However, the molded product immediately after molding is low in strength, and it is common to perform primary curing for 3 days or more until the strength that can be handled (crushing strength is 3 N / mm ² or more), and then secondary curing is common. (See, for example, Patent Document 1 and Patent Document 2).

  For this reason, it is necessary to provide a primary curing yard adjacent to the molding equipment, but the amount of processing is limited due to space limitations of the primary curing yard. Therefore, it is desired to shorten the primary curing time.

  Also, if the molded product gets wet in the rain before the primary curing is completed, the cement component in the molded product will flow out and the molded product will collapse. Therefore, it is necessary to construct a primary curing yard with a roof. , Equipment costs will be high. Therefore, it is necessary to shorten the primary curing time.

  The inventors separately confirmed that the primary curing can be performed within one day when the temperature of the molded product is 70 to 80 ° C. and the water content is 6 to 11%. However, when molding with an extruder with high productivity, in order to reduce the extrusion resistance in the extruder, the water content of the molded product must be increased to over 11% (usually about 12 to 13%). . Therefore, it is difficult to shorten the primary curing time.

JP 51-025402 A JP 2005-200719 A

Aiwa Takahashi, Reijiro Takahashi: Iron and Steel, 70 (1984), p37

In the present invention, based on the current state of the art, fine ore, other raw materials, and a cement-containing molded product formed by kneading cement (hereinafter sometimes simply referred to as “molded product”), The problem is to increase the strength of a molded product containing a large amount of water, for example, exceeding 11%, to an early level (within 1 day) to a handleable strength (for example, a crushing strength of 3 N / mm ² or more). And it aims at providing the temperature rising and drying method and apparatus of a molding which solve this subject.

The present inventors diligently studied a method for solving the above problems. As a result, if a band dryer is placed immediately after the molding machine, the molded product immediately after molding is heated and dried, and the difference in moisture content between the upper layer and the lower layer of the molded product is set to a predetermined value or less. It has been found that primary curing can be completed within one day, increasing the strength to a handleable strength (for example, a crush strength of 3 N / mm ² or more).

  The present invention has been made based on the above findings, and the gist thereof is as follows.

(1) In a method in which fine ore, other raw materials, and cement are kneaded, a cement-containing molded product molded by a molding machine is heated and dried with a dryer , and then cured to form a blast furnace charge . ,
(I) A band dryer is placed immediately after the molding machine, and hot air having a temperature of 100 to 180 ° C. and a dew point of 45 to 80 ° C. is sent to the band dryer, and the cement content immediately after molding in which the moisture content exceeds 11% by mass. The molded product is heated and dried,
(Ii) a band drier outlet side of the difference of the upper water content and lower water content of the cement-containing moldings by 3 mass% or less, primary curing at completion of cement within the next day mETHOD heating and drying of the cement-containing molded product according to claim <br/> that the crushing strength of the containing shaped product to 3N / mm ² or more.

  (2) In the step (i), hot air having a temperature of 120 to 150 ° C. and a dew point of 45 to 80 ° C. is fed into the band dryer. Drying method.

  (3) The cement according to (1) or (2), wherein, in the step (ii), the difference between the water content of the upper layer and the water content of the lower layer is 2% by mass or less. Method for heating and drying the contained molded product.

  (4) The method for heating and drying a cement-containing molded product according to any one of (1) to (3), wherein the molding machine is an extrusion molding machine.

  (5) Adjusting the layer thickness of the cement-containing molded product to be extruded by the extrusion molding machine and ensuring the difference in the amount of moisture, the ascending of the cement-containing molded product according to (1) to (4), Warm / drying method.

  (6) The method for heating and drying a cement-containing molded article according to (5) above, wherein the layer thickness of the cement-containing molded article is 50 mm or more and 100 mm or less.

  (7) The hot air is fed into a band dryer at a wind speed of 1.0 to 2.5 m / sec, and heated and dried for 1 to 5 minutes. A method for heating and drying the cement-containing molded product according to claim 1.

(8) In a device that kneads fine ore, auxiliary materials, and cement, and molds the cement-containing molded product molded by a molding machine with a dryer and then heats and dries it, and then cures it to form a blast furnace charge . Immediately after the molding machine, the hot air blowing conditions can be controlled under predetermined conditions within the ranges of a temperature of 100 to 180 ° C., a dew point of 45 to 80 ° C., and a wind speed of 1.0 to 2.5 m / sec . A temperature rising / drying device for a cement-containing molded article, wherein a band dryer for raising the temperature and drying the cement-containing molded article is arranged.

  (9) The temperature rising / drying device for a cement-containing molded product according to (8), wherein the molding machine is an extrusion molding machine.

According to the present invention, a primary curing that increases the strength of a molded product obtained by kneading fine ore, other raw materials, and cement to a strength that can be handled (for example, a crushing strength of 3 N / mm ² or more) Took 3 days, but can be done within 1 day. As a result, (a) the primary curing yard can be narrowed, (b) the processing amount of fine ore can be increased by a factor of 3 in the same primary curing yard area as before, (c) the primary curing yard with a roof Can be reduced, and the effect of reducing the equipment cost can be obtained.

It is a figure which shows the outline of the test method and apparatus for investigating the temperature rising and drying characteristic of a cement containing molding. It is a figure which shows the relationship between the layer thickness of a cement containing molding, and the drying rate of each layer (upper layer, middle layer, lower layer) of this molding. It is a figure which shows another relationship between the layer thickness of a cement containing molding, and the drying rate of each layer (upper layer, middle layer, lower layer) of this molding. It is a figure which shows the relationship between hot air temperature and the temperature increase rate in the case of hot air with a dew point of 15 degreeC and a dew point of 45 degreeC. It is a figure which shows the one aspect | mode of the apparatus of this invention. It is a figure which shows an example of the material balance of temperature rising and drying by the band dryer shown in FIG. It is a figure which shows the relationship (%) of the upper layer moisture content and lower layer moisture content of a molding in the band dryer delivery side, and the variation of the moisture content of the molding after primary curing. It is a figure which shows the relationship (%) of the upper layer moisture content and lower layer moisture content of a molding in the band dryer exit side, and the crushing strength of the molding after primary curing.

The method for heating and drying the cement-containing molded product of the present invention (hereinafter sometimes referred to as the “method of the present invention”) is a cement-containing molding in which fine ore, other raw materials, and cement are kneaded and molded by a molding machine. In the method of heating the material with a dryer and drying it, and then making it into a blast furnace charge through subsequent curing ,
(I) A band dryer is placed immediately after the molding machine, and hot air having a temperature of 100 to 180 ° C. and a dew point of 45 to 80 ° C. is sent to the band dryer, and the cement content immediately after molding in which the moisture content exceeds 11% by mass. The molded product is heated and dried,
(Ii) a band drier outlet side of the difference of the upper water content and lower water content of the cement-containing moldings by 3 mass% or less, primary curing at completion of cement within the next day The crushing strength of the contained molded product is 3 N / mm ² or more .

  In the step (i), the hot air sent into the band dryer is preferably hot air having a temperature of 120 to 150 ° C and a dew point of 45 to 80 ° C.

  In the step (ii), the difference between the water content in the upper layer and the water content in the lower layer of the cement-containing molded product is preferably 2% by mass or less.

  Hereinafter, the method of the present invention will be described.

  The inventors of the present invention heated and dried a cement-containing molded product having a high water content (for example, 11% by mass or more) immediately after molding into a molded product having a temperature of 70 to 80 ° C. and a water content of 6 to 11% by mass. In order to do so, the idea was to apply a band dryer.

  Usually, the band dryer is a dryer intended for drying, and therefore, when the molded product is dried, it is designed so that the drying speed is maximized within a range in which the shape of the molded product can be maintained. In the case of the method of the present invention, the molded product after the temperature rise and drying needs to be maintained at an appropriate temperature (70 to 80 ° C.) and an appropriate water content (6 to 11% by mass). It is necessary to design so that the speed and the drying speed can be controlled individually.

  The present inventors investigated the temperature rise / drying characteristics of the cement-containing molded product using the test method and apparatus shown in FIG. As shown in FIG. 1, a molded product 1 having a thickness of 5 to 20 cm and a thickness of 5 to 20 cm is held inside a cylindrical body 2 having a diameter of 390 mm, and the hot air 4 generated by a 40 kW hot air generator 3 is used as the molded product 1. The molded product 1 was heated and dried.

  At that time, the layer thickness of the molded product 1 was changed, and the temperature and the dew point of the hot air 4 were changed to measure the heating rate and the drying rate of the molded product 1. The measurement results are shown in FIGS.

  Fig. 2 shows the relationship between the layer thickness of the molded product and the drying rate of each layer (upper layer, middle layer, lower layer) when the molded product is heated and dried with hot air at a temperature of 120 ° C and a dew point of 15 ° C. Show.

  As shown in FIG. 1, the temperature rise / drying is performed by sending hot air 4 into the lower space of the molded product 1 and passing the molded product 1, so that the drying speed is different between the upper part and the lower part of the molded product 1. . The inventors divided the molded product into three layers of an upper layer, a middle layer, and a lower layer, and measured the drying rate of each layer.

  In addition, the upper layer, the middle layer, and the lower layer in the molded product are not limited to specific layer divisions, but in order to examine the drying rate and the temperature rise rate in the layer thickness direction, the upper layer, the middle layer, and the lower layer are divided into three layers. The survey was divided into two categories.

  From FIG. 2, when the layer thickness of the molded product (upper layer + middle layer + lower layer) becomes thicker, the lower layer drying rate (see “□” in FIG. 2) and the upper layer drying rate (see “◯” in FIG. 2) It can be seen that the difference increases. That is, the lower layer is overdried, and the upper layer is condensed with water, so that uniform drying over the entire layer of the molded product cannot be obtained. In addition, it can be seen from FIG. 2 that the average drying speed of the molded product is substantially constant regardless of the layer thickness of the molded product.

  Figure 3 shows the relationship between the layer thickness of the molded product and the drying rate of each layer (upper layer, middle layer, lower layer) when the molded product is heated and dried with hot air at a temperature of 120 ° C and a dew point of 45 ° C. Show.

  Similar to the relationship shown in FIG. 2, when the layer thickness of the molded product increases, the difference between the drying speed of the lower layer (see “□” in FIG. 3) and the drying speed of the upper layer (see “◯” in FIG. 2) It turns out that it grows. That is, the lower layer is overdried, the upper layer is insufficiently dried, and uniform drying over the entire layer of the molded product cannot be obtained. Moreover, it turns out that the average drying speed of a molded object is substantially constant irrespective of the layer thickness of a molded object similarly to the relationship shown in FIG.

  However, the difference between the drying speed of the upper layer and the drying speed of the lower layer is smaller than the difference when the dew point is 15 ° C. shown in FIG.

  FIG. 4 shows the relationship between the hot air temperature and the heating rate in the case of hot air having a dew point of 15 ° C. and a dew point of 45 ° C. The higher the hot air temperature, the faster the temperature raising rate. Moreover, even if the hot air temperature is the same, the heating rate is different if the dew point is different. As for the rate of temperature increase, hot air with a dew point of 45 ° C is faster than hot air with a dew point of 15 ° C.

  When the hot air temperature exceeded 180 ° C., the drying speed of the lower layer of the molded product was increased, and an explosion phenomenon that the molded product could not maintain its shape occurred and ventilation was not possible. For this reason, the hot air temperature is set to 180 ° C. or less. Preferably it is 150 degrees C or less.

  Based on the measurement results shown in FIGS. 2 to 4, a band dryer was designed and arranged immediately after the molding machine in order to prevent pulverization of the molded product due to transit during transportation and dropping.

That is, the cement-containing molded product heating / drying apparatus (hereinafter sometimes referred to as “the present apparatus”) for carrying out the method of the present invention kneads fine ore, auxiliary materials, and cement, In a device where the molded cement-containing molded product is heated and dried with a dryer and then cured to form a blast furnace charge , immediately after the molding machine, hot air blowing conditions are set at a temperature of 100 to 180 ° C. and a dew point. It is characterized by having a band dryer that can be controlled under predetermined conditions within a range of 45 to 80 ° C. and a wind speed of 1.0 to 2.5 m / sec. To do.

  FIG. 5 shows an embodiment of the device of the present invention for carrying out the method of the present invention. From the fine ore hopper 1a, the auxiliary raw material hopper 2a, and the cement hopper 3a, the fine ore, the auxiliary raw material, and the cement are cut out at a predetermined ratio and kneaded by the kneading and pulverizing machine 5 while adding the additive water 4a for kneading.・ Disintegrate.

  Next, the kneaded and crushed material for molding is kneaded with the kneader 6 while adding the additive water 4b for molding, and then extruded by the molding machine 7 to mold the molded product.

  The molding machine is not limited to a specific molding machine as long as it can mold a fine powder ore, other raw materials, and a cement kneaded material, but an extrusion molding machine is preferable from the viewpoint of productivity.

  In order to reduce the extrusion resistance in the extrusion molding machine and increase the productivity, the water content of the fine ore, other raw materials, and the cement kneaded material is usually 11% by mass or more. The same applies to the method of the present invention, and the water content of the molded product immediately after molding exceeds 11% by mass and is often 12 to 13% by mass or more.

  A molded product having a high water content, for example, immediately after molding exceeding 11% by mass is immediately sent to a band dryer 8 arranged immediately after the molding machine 7 and heated and dried with hot air whose temperature and dew point are adjusted. The By this temperature rise and drying, the difference between the water content of the upper layer and the water content of the lower layer of the molded product is set to 3% by mass or less on the exit side of the band dryer. When the difference in water content exceeds 3% by mass, the crushing strength of the molded product after the primary curing after 12 hours does not increase to a handleable strength. Preferably it is 2 mass% or less.

  The layer thickness of the molded product should be such that the difference between the moisture content of the upper layer and the lower layer of the molded product can be 3% by mass or less while maintaining the shape of the molded product on the exit side of the band dryer. However, 50 mm or more is preferable because the band transport speed is not increased too much, and 100 mm or less is preferable in terms of securing the above-described difference in water content.

  The hot air is a hot air having a temperature of 100 to 180 ° C, preferably 120 to 150 ° C, and a dew point of 45 to 80 ° C.

  Since the molded product is dried with hot air, the hot air temperature is set to 100 ° C. or higher. Preferably it is 120 degreeC or more. If the hot air temperature exceeds 180 ° C., as described above, the drying speed of the lower layer of the molded product increases, and a blow phenomenon occurs in which the molded product cannot maintain its shape and ventilation is not possible (see FIG. 4). The temperature is 180 ° C. or lower. Preferably it is 150 degrees C or less.

  The hot air is preferably used in a circulating manner. Part of the hot air is discharged out of the system through the bag filter 9. The dew point of hot air can be adjusted by adjusting the circulation amount of hot air. When not circulating, a steam blowing means is required for adjusting the dew point of hot air.

  If the dew point of the hot air is less than 45 ° C., the sensible heat of the hot air is lost to the latent heat of vaporization and the temperature does not rise. If the dew point of hot air exceeds 80 ° C., moisture condensation occurs on the surface of the molded product, and drying cannot be performed. Therefore, the dew point of hot air is set to 80 ° C. or less.

  Depending on the temperature and moisture content of the molded product immediately after granulation, the hot air temperature and dew point should be set within the above ranges so that the temperature of the molded product after heating and drying is 70 to 80 ° C. and the moisture content is 6 to 11%. adjust.

  The wind speed and temperature rise / drying time of the hot air sent to the band dryer may be appropriately set in consideration of the moisture content of the molded product and the temperature and dew point of the hot air. The wind speed is preferably 1.0 to 2.5 m / sec, and the temperature raising / drying time is preferably 1 to 5 minutes.

  Here, FIG. 6 shows an example of the mass balance of temperature rise and drying by the band dryer shown in FIG. This example is a mass balance when emphasizing an increase in the heating rate when the temperature of the molding is low in winter. The dew point is raised to prevent overdrying. For this reason, exhaust is reduced as much as possible, and the amount of exhaust is set to about the amount of moisture generated and the amount of combustion gas generating hot air.

  In summer, the temperature of the molded product is high, so the temperature rises only slightly, and the temperature is raised and dried with an emphasis on drying. For this reason, the displacement is increased, the dew point is lowered, and the drying speed is increased.

  Since the molded product (temperature difference between the upper layer and the lower layer: 3% or less, preferably 2% or less) that has been heated and dried by the band dryer 8 is vulnerable to a drop impact, the fall distance is made as small as possible, The molded product is loaded in the primary curing yard 11 with a loader 10 designed not to give a drop impact. The primary curing yard is preferably composed of three surfaces in order to increase the efficiency of the curing operation.

In order to increase the strength of the molded product as early as possible (within 1 day) to the strength that can be handled by primary curing (crushing strength of 3 N / mm ² or more), the present inventors have performed the band drying shown in FIG. After changing the hot air conditions for temperature rise and drying by the machine, the difference between the upper layer moisture content and the lower layer moisture content (%) on the exit side of the band dryer, and after loading in the primary curing yard The relationship of variation in the moisture content of the molded product after 12 hours was investigated.

  At this time, the temperature of the hot air was 100 to 180 ° C., the dew point was 45 to 80 ° C., and the variation in moisture content was measured by changing the layer thickness of the molded product.

  FIG. 7 shows the measurement results. From FIG. 7, when the difference between the water content of the upper layer and the water content of the lower layer on the exit side of the band dryer is large, the variation in the water content of the molded product after the primary curing for 12 hours is large. There is a concern that the crushing strength of the later molded product is lowered.

  For this reason, the present inventors further added a difference (mass%) between the moisture content of the upper layer and the moisture content of the lower layer on the outlet side of the band dryer, and 12 hours have elapsed after loading in the primary curing yard. The relationship between the crushing strength of the molded products was investigated. FIG. 8 shows the survey results.

  It can be seen from FIG. 8 that if the difference between the water content of the upper layer and the water content of the lower layer on the exit side of the band dryer is large, the crushing strength of the molded product after the primary curing is lowered. This is because, in a molded product, a layer with a small amount of water does not cause a hydration reaction of cement, and a layer with a high amount of water has a slow hydration reaction, resulting in uneven crushing strength. It is estimated that the crushing strength does not increase.

In addition, from FIG. 8, in order to achieve a strength of 3 N / mm ² or more necessary for handling the molded article after the primary curing for 12 hours, on the outlet side of the band dryer, the moisture content of the upper layer of the molded article and the lower layer It can be seen that the difference in moisture content should be 3% or less. Further, it is understood that if the difference in water content is 2% or less, the crushing strength exceeds 3 N / mm ² and is more preferable. The temperature of the hot air at this time was 100-180 degreeC, and the dew point was 45-80 degreeC.

  Therefore, on one side of the primary curing yard, the primary curing can be completed in one day by the work of 8 hours of loading, 12 hours of curing, and 4 hours of payout. If the primary curing yard is composed of three surfaces, the primary curing can be performed efficiently.

The molded product having a crushing strength of 3 N / mm ² or more after the primary curing is removed by the sieve 12 from the undersize portion and the oversize portion, and is stacked in the secondary curing yard 13. The molded product is subjected to secondary curing in the secondary curing yard 13 and the strength is increased to a strength required for blast furnace operation, and then used as a blast furnace charge.

  The undersize portion and the oversize portion removed by the sieve 12 are fed to the kneading / pulverizing machine 5 as a kneading raw material.

  Next, examples of the present invention will be described. The conditions in the examples are one example of conditions used for confirming the feasibility and effects of the present invention, and the present invention is based on this one example of conditions. It is not limited. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

(Example)
90% fine ore, 5% auxiliary material (fine limestone for adjusting basicity) and 5% cement are kneaded and crushed with a kneading and pulverizing machine while adding water for kneading, and then used for molding. The added water was added and kneaded with a kneader, and then molded with a molding machine. The water content of the molded product immediately after molding was 13%.

  One band dryer was installed at the molding machine outlet with respect to the molding machine 90 wet-t / hr1 group, and the molded product was heated and dried.

The effective band area is 45 m ² , and in order to dry the moisture content of 13% of the molded product to less than 11%, the molded product discharged from the molding machine at 40 ° C. in the circulation air volume shown in FIG. The temperature was raised and dried for 2 minutes with hot air at a temperature of 120 ° C and a dew point of 60 ° C. As a result, the molded product after heating and drying had a temperature of 70 ° C. and an average moisture content of 9%. The layer thickness of the molded product was 50 mm, and the difference between the moisture content of the upper layer and the moisture content of the lower layer was 1.1%.

The molded product was cured with a loading time of 8 hours and a primary curing time of 12 hours, and then the crushing strength was measured. The crushing strength was 3.3 N / mm ² .

  Similarly, in the summer, the molded product discharged from the molding machine at 70 ° C. was heated and dried for 2 minutes with hot air having a temperature of 120 ° C. and a dew point of 45 ° C. As a result, the molded product after heating and drying had a temperature of 78 ° C. and an average moisture content of 8%. The layer thickness of the molded product was 50 mm, and the difference between the moisture content of the upper layer and the moisture content of the lower layer on the band dryer exit side was 1.8%.

The molded product was cured with a loading time of 8 hours and a primary curing time of 12 hours, and then the crushing strength was measured. The crushing strength was 3.8 N / mm ² .

  As described above, according to the present invention, since the primary curing that conventionally required three days can be performed within one day, (a) the primary curing yard can be narrowed, (b) the same as the conventional one. The processing amount of fine ore can be increased by a factor of three in the yard area, and (c) the primary curing yard with a roof can be reduced and the equipment cost can be reduced. Therefore, the present invention has high applicability in the steel industry.

DESCRIPTION OF SYMBOLS 1 Molded object 2 Cylindrical body 3 Hot air generator 4 Hot air 1a Fine powder ore hopper 2a Secondary raw material hopper 3a Cement hopper 4a Additive water for kneading 4b Additive water for molding 5 Kneading / pulverizing machine 6 Kneading machine 7 Molding machine 8 Band dryer 9 Bug Filter 10 Stacker 11 Primary curing yard 12 Sieve 13 Secondary curing yard

Claims (9)

In a method of kneading fine ore, other raw materials, and cement, and molding a cement-containing molded product molded with a molding machine, heating and drying with a dryer , and then making it into a blast furnace charge through curing ,
(I) A band dryer is placed immediately after the molding machine, and hot air having a temperature of 100 to 180 ° C. and a dew point of 45 to 80 ° C. is sent to the band dryer, and the cement content immediately after molding in which the moisture content exceeds 11% by mass. The molded product is heated and dried,
(Ii) a band drier outlet side of the difference of the upper water content and lower water content of the cement-containing moldings by 3 mass% or less, primary curing at completion of cement within the next day mETHOD heating and drying of the cement-containing molded product according to claim <br/> that the crushing strength of the containing shaped product to 3N / mm ² or more.   In the said (i) process, hot air with a temperature of 120-150 degreeC and a dew point of 45-80 degreeC is sent into a band dryer, The temperature rising and drying method of the cement containing molding of Claim 1 characterized by the above-mentioned.   The temperature rise of the cement-containing molded article according to claim 1 or 2, wherein, in the step (ii), the difference between the water content of the upper layer and the moisture content of the lower layer of the cement-containing molded product is 2% by mass or less. -Drying method.   The method for heating and drying a cement-containing molded article according to any one of claims 1 to 3, wherein the molding machine is an extrusion molding machine.   The temperature rise of the cement-containing molded article according to any one of claims 1 to 4, wherein a layer thickness of the cement-containing molded article extruded by the extrusion molding machine is adjusted to ensure a difference in the moisture content. -Drying method.   6. The method for heating and drying a cement-containing molded article according to claim 5, wherein the cement-containing molded article has a layer thickness of 50 mm or more and 100 mm or less.   The hot air is fed into a band dryer at a wind speed of 1.0 to 2.5 m / sec, and the temperature is raised and dried for 1 to 5 minutes. A method for heating and drying cement-containing moldings. A molding machine in an apparatus that kneads fine ore, auxiliary materials, and cement and molds the cement-containing molded product with a molding machine, heats and dries it with a dryer , and then converts it into a blast furnace charge after curing. Immediately after the cement-containing molding immediately after molding, the hot air blowing conditions can be controlled under predetermined conditions within the ranges of a temperature of 100 to 180 ° C., a dew point of 45 to 80 ° C., and a wind speed of 1.0 to 2.5 m / sec. A temperature-driing / drying device for a cement-containing molded product, characterized in that a band dryer for heating and drying the material is disposed.   The temperature rising / drying device for a cement-containing molded product according to claim 8, wherein the molding machine is an extrusion molding machine.

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