JP2001030213A - Manufacture of sulfur composition molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure manufacturing stability and at the same time, make it possible to introduce the automation of entire manufacturing processes by performing at least a raw material kneading process and the following steps upto a kneaded product molding process inclusive within a range of specific temperatures. when a molding consisting of a sulfur composition containing sulfur and mineral powder is manufactured. SOLUTION: Water vapor generated by a boiler 12 is supplied through dedicated piping and molten sulfur in a storage tank 2 is supplied to an intermediate tank 5 with a measuring device by an automatic fixed displacement pump in such a state that a raw material passage system of a series of components such as conveying pipes and devices and a sulfur storage tank 2 is heated and heat-retained. On the other hand, a mineral raw material such as fly dust in a storage silo 1 is supplied to an intermediate tank 4 through a preheater 3. Next a specified amount of the raw material automatically weighed is supplied to a kneader 6 together with a specified amount of the molten sulfur to be kneaded at 120-160 deg.C, and the kneaded product is cast into a form 7 made of high-speed steel from an injection pipe 8 to be molded, while the form 7 is vibrated. Thereafter the molding is released from the form 7 by a release device 10 and is slowly cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing a molded article comprising a sulfur composition. More specifically, the present invention relates to a manufacturing method suitable for automating a manufacturing process and manufacturing a large amount of the molded article.

[0002]

2. Description of the Related Art There are known sulfur mortars and sulfur concretes in which aggregate is mixed with sulfur, heated to a temperature at which sulfur is melted, kneaded, and cooled and solidified. When producing a cured product of these sulfur compositions, to prevent the separation of sulfur and aggregates, and to reduce shrinkage and voids during solidification, fly ash, silica that does not change at the melting temperature of sulfur It is customary to mix mineral powders such as clay minerals. In the case of mass-producing a product having a specific shape such as a block made of such a sulfur composition, it has been studied to increase the productivity by automating the production process and performing continuous operation.

[0003] In general, the following points must be taken into consideration in the production of sulfur composition products. That is, (a) the viscosity of the molten sulfur is apt to change greatly due to a slight change in temperature.
(B) Further, the fluidity (viscosity) of the mixture is liable to change greatly depending on the mixing ratio of the sulfur and the mineral substance powder.
(C) When the mixture is filled in a mold, if a void remains, a high-strength cured product cannot be obtained. (D) If the mixing state of the sulfur and the mineral powder is not uniform, the early strength of the cured sulfur composition tends to decrease. (E) It is necessary to release the molded product from the mold after solidifying it until the strength inside the molded product is sufficiently developed. If the time for this is insufficient, the molded product may be deformed by its own weight. In order to efficiently mass-produce sulfur composition products while saving labor, it is necessary to take sufficient measures not only to set up a production process suitable for automation, but also to take note of these points. In taking countermeasures, it is especially important to control and control the viscosity (fluidity) of raw materials and mixtures. The more constant this value and the less the variation, the easier the process operation becomes and the easier it is to implement mechanization and automation. Also, the quality of the obtained product is easily stabilized.

[0004]

In the production of a sulfur composition product, even if a highly fluid sulfur raw material is used, the fluidity tends to change considerably from the subsequent mixture to the end of molding. For this reason, the manufacturing conditions in each step are made to correspond to the fluidity of the raw material or the material in the manufacturing process at that time, and may be delicately changed or adjusted to keep the fluidity at a constant value for each process / equipment. It is preferable to perform the process, but in an automated manufacturing process, it is necessary to install a device or the like for detecting and adjusting and controlling the fluidity for each device, which increases the cost. Further, it is extremely difficult to change the manufacturing conditions each time in an automated line, and it is not easy to select an optimal viscosity adjusting means for each process, and the efficiency is low. On the other hand, if the allowable range of the manufacturing conditions is widened and only the certain manufacturing operation is performed, it may be difficult to obtain a stable quality sulfur composition product.

[0005]

Means for Solving the Problems As a result of repeated studies for solving the above-mentioned problems, the present inventors have heated a mixture containing a sulfur raw material and sulfur to a certain temperature in a specific production process section relating to the production of a sulfur composition product. In this way, manufacturing stability can be ensured without adjusting the manufacturing conditions each time.Furthermore, by designing the manufacturing conditions suitable for automation in consideration of the difference in fluidity caused by the compounding ratio, the manufacturing Automation can be easily introduced throughout the entire process, and the stability of the product quality and the drastic improvement in productivity have been achieved, thereby completing the present invention.

That is, the present invention relates to a method for producing a molded article comprising (a) a sulfur composition containing sulfur and a mineral powder,
It comprises a raw material storage step, a raw material supply step, a raw material kneading step, a kneaded material forming step, a continuous step of a molded product taking out step, and at least the raw material kneading step to the kneaded material forming step are 120 to 160
A method for producing a molded article of a sulfur composition, characterized in that the method is carried out at ℃.

The present invention also provides the method for producing a sulfur composition molded article according to the above (a), wherein (b) the sulfur in the sulfur raw material storage is kept at 120 to 160 ° C.

The present invention also relates to (c) a sulfur composition comprising 100 parts by weight of sulfur, mineral powder or mineral powder and fine aggregate 10
(A) comprising 0 to 400 parts by weight.
Or (b) a method for producing a sulfur composition molded article.

Further, according to the present invention, (d) the sulfur composition comprises 100 parts by weight of sulfur, mineral powder or mineral powder, and fine aggregate 25;
The kneaded material forming step for a kneaded material comprising 0 to 400 parts by weight is performed by vibration pressure molding, and the production of the sulfur composition molded product according to any one of (a), (b) and (c) above is performed. Method.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The sulfur composition according to the present invention comprises a mineral powder which is generally blended as a filler component in sulfur and sulfur concrete, and a part of the filler component is a known component. It may be replaced with fine aggregate for concrete. The molded article finally produced is a cured product of this sulfur composition.

[0011] The method for producing a sulfur composition molded article of the present invention comprises:
A method for producing a shaped article composed mainly of such a sulfur composition, which can be formed by mold forming or the like, comprising a raw material supply step from each raw material storage, a raw material blending step, a raw material kneading step, a kneaded material forming step, It consists of a continuous process of taking out an object. Hereinafter, details of the production method of the present invention will be described for each step.

[Raw Materials] The raw material sulfur for producing a molded article made of the sulfur composition is single elemental sulfur, which may be obtained by any production method, for example, by-produced in a petroleum refining process. Sulfur or a reagent commercially available may be used. Similarly, mineral powders used as raw materials include, for example, limestone powder, fly ash, bottom ash, crushed stone powder and stone processed powder, various ceramics dust powder, blast furnace slag, and incinerated ash of various combustible wastes. Alternatively, a part of the mineral powder, preferably up to half its weight, can be replaced with fine aggregate. The fine aggregate may be any known fine aggregate for concrete. Mineral powder has an average particle size of 0.005 mm to 0.3 m
m, and a range in which the maximum content particle size does not exceed a size of several mm.

[Raw Material Storage Step] Each of the above raw materials is separated into at least sulfur and raw materials other than sulfur and stored in separate storage facilities. Examples of the raw material storage facility include a storage such as a silo and a tank for fluidized raw material.
Sulfur in the raw material storage facility may be stored and stored at room temperature, but is preferably heated and stored at 120 to 160 ° C. Raw materials other than sulfur, such as mineral powder and fine aggregate, may be stored in a storage provided with a hopper or the like. When the mineral powder and the fine aggregate are used at the same time as the raw materials, the pre-blend may be stored in the same raw material storage or may be stored separately. Mineral powder or mineral powder and fine aggregate are stored at room temperature, but may be stored by heating to the same temperature as sulfur.

[Material Supply Step] Material is discharged from a storage facility such as a raw material storage by supplying a predetermined amount of mineral powder or mineral powder and fine aggregate at the time of transport using a belt conveyor or a bucket elevator using a belt feeder or the like. Further, it is supplied to a kneading step via a preheating device as required. The preheating device is for intensively heating the mineral raw material or the mineral raw material and the aggregate and the aggregate stored at room temperature in the storage to 120 to 160 ° C., but is not necessarily required, but a batch-type kneader in the next step, for example, When a Loedige type or Henschel type mixer is used, it is preferable to pass through a preheating device.
Examples of the preheating device include an external heat or internal heat kiln, a steam tube dryer (STD), and the like. When passing through the preheating device, the carry-out route from the preheating device is also heated to the same temperature as the preheating device. On the other hand, regardless of whether or not the sulfur raw material is heated during storage, the sulfur is carried out of the storage through a transport pipe, and the transport pipe is all heated to 120 to 160 ° C. As a driving source for sulfur transport in the transport pipe, a device capable of transporting a predetermined amount of liquid, such as a metering pump, is used. At the time of transportation, at least 120 to 16 sulfur is transported in the transport pipe section or in the storage facility.
It is heated to 0 ° C. to form molten sulfur, and at this temperature, it is in a relatively low-viscosity fluid state. In addition, any raw materials or raw material preparations (kneaded materials) including this step and the following steps
It is desirable that the transport pipes for transporting the material be made of a material having high heat resistance such as metal, ceramics, and flame-retardant hard resin, and be covered with a heat insulating material in order to prevent heat loss.
In addition, a temporary storage device such as an intermediate tank with a weighing adjustment function added to the raw material during the supply step may be provided to adjust the supply intermittently, especially when a batch-type kneader is used. It is convenient to supply a predetermined amount of the raw material at regular intervals via the. In this case, the intermediate tank is also 120-160 ° C
Heat to Each raw material is supplied to a kneader in the next step in a predetermined amount required for compounding.

[Raw Material Kneading Step] Each raw material is mixed in this step. Mixing is carried out using a kneader, and 100 parts by weight of sulfur, 100 to 400 parts by weight, preferably 200 to 300 parts by weight of mineral powder or mineral powder and fine aggregate are mixed and kneaded. When the compounding ratio of the mineral powder or the mineral powder and the fine aggregate exceeds 400 parts by weight, the amount of sulfur having the action of the binder is relatively reduced, so that a hard cured product cannot be obtained, which is preferable. If the amount is less than 100 parts by weight, considerable shrinkage is caused during solidification of sulfur, and cracks and voids are easily generated in the cured product, which is not preferable. Kneading is 120
Performed under heating at 160 ° C. The kneading device is a known device,
Although there is no particular limitation as long as it can be heated to 120 to 160 ° C., a continuous kneader such as a kneader type is particularly recommended for enhancing the production efficiency by automation. The kneading time is suitably about 3 to 60 minutes, and in a continuous kneader, the residence time in the machine is appropriately selected within the above range according to the throughput, the equipment capacity, and the mixing ratio of the kneaded material. The smaller the better, the longer the time.
Continuous operation in which two or more kneading devices are arranged and connected in series, or premixing of the blended raw materials may be performed as a pretreatment for kneading, so that the kneading time can be reduced. Incidentally, the mineral powder at normal temperature or the mineral powder and the fine aggregate are charged into a continuous kneader, and when sufficient heating is performed at the above temperature, molten sulfur is supplied to the kneader to perform kneading. . In this case, it is not necessary to heat the mineral powder or the mineral powder and the fine aggregate before the kneading machine is supplied before kneading, which can reduce the equipment cost related to the preheating system and the utility cost, but also increase the residence time in the kneading machine. And the production volume per unit time is reduced. Therefore, it is desirable to appropriately select according to the product to be handled, the production volume, and the like.

[Kneaded Material Forming Step] The kneaded material after kneading is formed into a desired shape in this step. In this step and the subsequent steps, it is necessary to change some of the setting conditions depending on the mixing ratio of the constituent components of the kneaded material. The kneaded material of any mixing ratio is 120 to
Molding can be performed using a mold having a desired shape heated to 160 ° C., but a kneaded material containing less than 250 parts by weight of mineral powder or mineral powder and fine aggregate with respect to 100 parts by weight of sulfur contained. In order to exhibit generally high fluidity, the mixture is conveyed by a pipe from an injection port or a kneader connected to a kneader discharge port and poured into a forming mold. When pouring, it is better to vibrate the mold. The mold is desirably a metal mold such as steel or high-speed steel from the viewpoint of thermal conductivity and durability. In the case of a kneaded material having a particularly low viscosity at the temperature, molding can be performed only by cooling the entire mold after pouring. Usually, the mold into which the kneaded material is poured is conveyed to a molding machine by a belt conveyor or the like to perform molding. The molding machine is preferably a single-shaft or multi-shaft pressure molding machine suitable for the mold, and the pressing force is approximately 200 kgf /
cm ² or less. Further, a vibration pressure molding machine may be used. In these molding machines, it is necessary to maintain at least a portion in contact with the kneaded material, for example, upper and lower punch portions, at a temperature of 120 to 160 ° C. The pressurization time is approximately 1 to 3 minutes. 120 to 16 molds before kneading
Keep at a temperature of 0 ° C. If a known mold release agent such as silicone oil, which does not deteriorate even at 160 ° C., is applied to the inner surface of the mold used in advance, the subsequent mold removal operation can be easily performed. Also,
Extrusion molding machines and the like can also be used depending on the desired product shape. In this case, the kneaded material is directly supplied to the molding material input port of the molding machine, but the temperature is kept at 120 to 160 ° C. at least from the input port to the molded product discharge port. On the other hand, with respect to 100 parts by weight of sulfur contained, a kneaded material containing 250 to 400 parts by weight of a mineral substance powder or a mineral substance powder and fine aggregate does not have high fluidity even in a heated state. Molding,
Preferably, it is performed by vibration pressure molding. Injection into the mold is preferably performed directly from an inlet connected to the outlet of the kneader, and preferably, the mold is vibrated during the injection. After the injection, the mold is moved to a molding machine and molded. Also in this case, the temperature of the mold and the upper and lower punch portions of the molding machine need to be maintained at 120 to 160 ° C. Pressure is 5Kgf / cm ² or more and 500K
gf / cm ² or less, preferably 20 kgf / cm ² or more 5
And 00Kgf / cm ² or less, the vibration is carried out until the end of at least the start of application at the output of 1 to 1000 g.

[Molded Product Removal Step] The extruded molded product is placed on a belt conveyor or the like under a normal temperature environment and transported to a product storage. Further, the process conditions after the molding of the molded article formed by the mold are different depending on the mixing ratio of the components.
0 parts by weight, 100 of mineral powder or mineral powder and fine aggregate
For molded products containing not less than 250 parts by weight, without immediately removing the mold, after stopping the heating of the mold, cool the mold together with the mold to near room temperature, and release the molded product when the molded product is sufficiently cooled. I do. Cooling is preferably slow cooling to avoid shrinkage cracks due to rapid cooling. This demolding is preferably carried out at a place away from the molding machine, and is allowed to cool naturally while being conveyed to a demolding place by a belt conveyor or the like. Alternatively, it is more preferable to provide a cooling zone in the transport path and to blow the room temperature air to the mold being transported appropriately to cool it, since this leads to a reduction in the cooling time. On the other hand, 100 parts by weight of sulfur, mineral powder or mineral powder and fine aggregate are 250 to 40 parts by weight.
A molded article containing 0 parts by weight can be released from the mold at any time after the completion of molding, and can be released almost immediately. The temperature at the time of demolding is not limited, and no special cooling treatment is required. In the case of a molded product having any mixing ratio, the mold and the molded product are released from the mold using a demolding apparatus. It is preferable to use a hydraulic pusher suitable for automation as the demolding device. The mold after demolding is cleaned and used for the next molding. It is preferable to provide a plurality of such molds on a production line and use them continuously. The finally obtained molded product is transported to a product storage by a belt conveyor or the like and stored at room temperature.

[Heating System] In the above steps, in order to heat and maintain the apparatus and the piping system at 120 to 160 ° C., an individual heating apparatus such as an electric heater may be attached to each apparatus. However, using a heating boiler for generating a heat medium, each process that requires heat from there using a dedicated pipe
Preferably, they are fed simultaneously to the device. The pipe material is preferably a heat-resistant metal having high thermal conductivity as much as possible. The heating medium is not particularly limited, but is preferably steam which is inexpensive and has a high calorific value. However, for those having high operability and mobility such as punches and molds of a molding machine, it is assumed that an electric heater is individually attached.

[Automation of Manufacturing Process] The manufacturing method of the present invention is particularly suitable for automation, and a known centralized control performed by attaching a sequencer or the like to the operation and operation management of devices and devices in each process. By introducing the system, the production line can be made almost fully automatic.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The manufacturing method of the present invention will be specifically described with reference to a schematic diagram showing an example of the flow of all manufacturing steps. [Example 1] In a steam producing boiler (12), steam having a vapor pressure of 5 atm and 150 ° C was generated, and via a dedicated pipe, a transport pipe and devices in a dotted frame shown in Fig. 1 and storage of sulfur. A series of raw material passing systems such as the tank (1) were heated and kept at about 150 ° C. In the storage tank, sulfur purchased in the form of molten sulfur is stored, and the molten sulfur is transferred from the storage tank to an intermediate tank (5) with a weighing machine through a transport pipe heated to the same temperature using an automatic metering pump as a driving source. ), And then supplied and conveyed to the kneading machine (6) through a heated transport pipe at a predetermined amount (43 liters / per product production) for each molded product production.

On the other hand, fly ash powder, which has been preliminarily adjusted to 0.1 mm or less by a pulverizer and stored at room temperature as a mineral powder in a dedicated storage silo (1), is loaded on a belt feeder by a bucket elevator, and It was pumped to the preheating device (3). The preheating apparatus was performed by STD (manufactured by Tsukishima Kikai). After preheating at 150 ° C. for about 10 minutes by a preheating device, this was conveyed to an intermediate tank (4) heated to 150 ° C. with a measuring function, where it was automatically weighed to a predetermined amount (167 K).
g / per product manufactured) of fly ash powder was supplied to and conveyed to the kneading machine (6) by a belt feeder while maintaining a heated state.

The transported molten sulfur and the heated fly ash powder were simultaneously charged into a Loedige mixer in which steam was heated at 150 ° C. and kneaded for about 3 minutes.

The kneaded material after kneading is filled with a silicone oil releasing agent on the inner surface in advance through an injection pipe (8) directly connected to the kneader so that the inner diameter of the upper surface is 500 mm long, 500 mm wide,
A 1000 mm high prismatic high-speed steel formwork (7)
Pouring while applying the vibration of 720G on the vibration table,
In particular, molding was performed by filling the inside of the mold frame with the kneaded material without applying pressure or the like. The vibration to the mold was stopped several seconds after the completion of the kneading and distribution. The mold was heated to 150 ° C. by an individually attached electric heater from before filling the kneaded material until the vibration was stopped.

After the vibration was stopped, the heating of the mold was also stopped, and thereafter, all the steps were performed in a normal temperature environment. The molded form is moved to a demolding device (11) by a belt conveyor through a cooling zone (10), and in the cooling zone, compressed air of about 9.6 kgf / cm ² is being conveyed at a flow rate of ³ m ³ / min. The mold was sprayed on the surface of the mold to allow the entire mold to cool, and the molded product filled in the mold was gradually cooled to a temperature near room temperature while passing through the cooling zone.

After gradually cooling, the block-shaped molded product was released from the mold when the temperature reached approximately 35 ° C. or less. In the demolding apparatus, the bottom of the mold frame was attracted to the magnet by a hydraulic pusher equipped with a magnet, and at the same time, was lifted upward to release the mold from the mold by projecting the molded body and releasing the mold. The molded article was extruded onto a belt conveyor by another pusher and conveyed to a product storage. Further, the used mold was transported to a mold cleaning step. In the above manufacturing apparatus, including the transport device between processes, continuous automatic operation was performed by centralized control using a sequencer.

In this way, 20 hardened material blocks were continuously manufactured per hour, and six blocks were arbitrarily sampled from the block products manufactured during 24 hours, and the compressive strength (JI 1 day after) was obtained.
SA1108) and bulk density (JIS Z8)
401 method, the compression strength was 3
8N / mm ² , the bulk density was 1.94 g / cm ³ , and in each case there was no difference in the characteristic value depending on the sampling time, and the values were constant.

Example 2 A boiler (12) for producing steam similar to that in Example 1 generates steam having a vapor pressure of 5 atm and a temperature of 150 ° C., and through a dedicated pipe, a bold line shown in FIG. A series of raw material passing systems such as transport pipes and equipment, a sulfur storage tank (1), and the like were heated and maintained at about 150 ° C. In the storage tank, sulfur purchased in the form of molten sulfur is stored, and the molten sulfur is transferred from the storage tank to an intermediate tank (5) with a weighing machine through a transport pipe heated to the same temperature using an automatic metering pump as a driving source. ), And a predetermined amount (36 liters / per product production) was supplied and conveyed to the kneading machine (6) at a flow rate of about 12 liters per minute through a heated transport pipe every time a molded article was produced.

On the other hand, coal ash powder, which has been crushed and adjusted to 0.1 mm or less in advance by a crusher and stored at room temperature in a dedicated storage silo (1), is loaded on a belt feeder by a bucket elevator, and Preheating device (3)
Pumped. The preheating apparatus was performed by STD (manufactured by Tsukishima Kikai). After preheating at 150 ° C for about 10 minutes with a preheating device, this is conveyed to an intermediate tank (4) heated to 150 ° C with a measuring function, where it is automatically weighed and a predetermined amount (180 kg / product production) of coal ash The powder was fed and fed to the kneading machine (6) by a belt feeder at a rate of 60 kg / min while maintaining the heated state.

[0029] The molten sulfur and coal ash conveyed continuously are
The mixture was simultaneously charged into a continuous kneader-type kneader heated by flowing steam at 50 ° C. and kneaded continuously for a residence time of about 5 minutes. The kneaded material after kneading is supplied from the injection pipe (8) directly connected to the kneader.
The inner dimensions of the upper surface opening with the silicone oil release agent applied to the inner surface in advance are 500 mm long, 500 mm wide, and 1000 m high
The mixture was poured into a square column-shaped high-speed steel mold (7) while applying a vibration of 720 G using a vibration table, and the mold containing the kneaded material was conveyed to a molding machine (9) by a belt conveyor. The mold was heated and maintained at 150 ° C. from before the filling of the kneaded material to the end of molding by means of an electric heater individually attached.

As the molding machine (9), an oscillating uniaxial press molding machine is used. Only the upper punch and the lower punch are equipped with electric heaters and are heated to 150 ° C., and the other main body is provided with steam from the boiler. The heated piping was attached and heated to approximately the same temperature. The upper punch was brought into contact with the upper surface of the kneaded material in the conveyed and set mold, pressurized at a molding pressure of 5 kgf / cm ² , and simultaneously molded by applying a vibration force of 720 G. The pressurization / vibration time was 3 minutes, and after the pressurization, the vibration and heating were stopped immediately.

After the molding, the heating of the mold was immediately stopped, and the subsequent steps and the inter-step moving path were placed in a normal temperature environment. The molded form was moved to a demolding device (11) by a belt conveyor.

The block-like molded product moved to the demolding device was immediately demolded from the mold. In the demolding apparatus, the bottom of the mold frame was attracted to the magnet by a hydraulic pusher equipped with a magnet, and at the same time, was lifted upward to release the mold from the mold by projecting the molded body and releasing the mold. The molded article was extruded onto a belt conveyor by another pusher and conveyed to a product storage. Further, the used mold was transported to a mold cleaning step. In the above manufacturing apparatus, including the transport device between processes, continuous automatic operation was performed by centralized control using a sequencer.

In this manner, 20 hardened body blocks were continuously produced per hour, and six blocks were arbitrarily sampled from the block product manufactured during 24 hours, and the compressive strength (JI) one day after the material age was determined.
SA1108) and bulk density (JIS Z8)
401), the compression strength was 4
The bulk density was ² N / mm ² , and the bulk density was 1.96 g / cm ^{3. In} each case, there was no difference in the characteristic value depending on the sampling time, and the values were constant.

[Comparative Example] An apparatus and a process similar to those in Example 1 were provided, and a boiler for producing steam was used.
Except for generating steam at 50 ° C. and heating only the sulfur storage tank to about 150 ° C. via a dedicated pipe, all the equipment, the transport pipes for the raw materials and the kneaded material were not heated and kept at room temperature. In the storage tank, sulfur purchased in the form of molten sulfur is stored, and the molten sulfur is supplied from the storage tank to an intermediate tank equipped with a weighing machine through a transport pipe by using an automatic metering pump as a driving source, and is used for producing each molded article. , A predetermined amount (43 liters / per product) was supplied to the kneading machine through the transport pipe, but solidification of the sulfur raw material occurred on the pipe wall of the transport pipe. Can no longer be transported.

[0035]

According to the production method of the present invention, it is easy to produce a sulfur composition molded article with extremely excellent productivity and stable quality without finely adjusting the production conditions each time in each step. Can be performed and, therefore, continuous automation of the manufacturing process can be easily introduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of an embodiment of a flow of a manufacturing process according to the present invention.

FIG. 2 is a diagram illustrating another example of the flow of the manufacturing process of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mineral raw material storage silo 2 Sulfur storage tank 3 Preheating device 4 For intermediate tank / mineral raw material 5 Intermediate tank / molten sulfur 6 Kneader 7 Formwork 8 Kneaded material injection pipe 9 Vibration press forming machine 10 Cooling zone 11 Desorption Molding device 12 Boiler

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahiro Kato 6276 Onoda Hiroshi Onoda, Onoda City, Yamaguchi Prefecture Inside (72) Inventor Tsuyoshi Matsura 6276 Onoda, Onoda City, Yamaguchi Prefecture Hiroshi Taihei Cement Co., Ltd. F term (reference) 4G012 PA26 PA27 PD01 PE04 4G054 AA00 AC00 BA02 BA29 DA02 DA03

Claims (4)

[Claims] 1. A method for producing a molded article comprising a sulfur composition containing sulfur and a mineral powder, comprising: a raw material storage step, a raw material supply step, a raw material kneading step, a kneaded product molding step, and a molded product taking-out step. Consisting of at least a raw material kneading step
A method for producing a sulfur composition molded product, wherein the kneaded product molding step is performed at 120 to 160 ° C. 2. Sulfur in a sulfur raw material storage is 120 to 16
The method for producing a molded article of a sulfur composition according to claim 1, wherein the temperature is maintained at 0 ° C. 3. The sulfur composition molded article according to claim 1, wherein the sulfur composition comprises 100 parts by weight of sulfur and mineral powder or mineral powder and 100 to 400 parts by weight of fine aggregate. Production method. 4. A kneaded material forming step for a kneaded material in which the sulfur composition is composed of 100 parts by weight of sulfur and mineral powder or mineral powder and 250 to 400 parts by weight of fine aggregate is performed by vibration pressure molding. The method for producing a molded article of a sulfur composition according to claim 1.