JP2005289787A - Sulfur slurry, method of preparing sulfur slurry and method of manufacturing sulfur solidified body using the same sulfur slurry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of preparing sulfur slurry and a method of manufacturing a sulfur solidified body using the sulfur slurry. <P>SOLUTION: The sulfur slurry is prepared by spraying molten sulfur from a spray nozzle using a forcibly feeding air cylinder 13 to atomize to have ≤500 μm particle diameter and on the other hand, spraying water containing a surfactant from a spray nozzle for water using a diaphragm pump 16 to atomize to have ≤500 μm particle diameter and bringing the micronized water droplet into contact with the micronized sulfur droplet to solidify the sulfur droplet and highly disperse the sulfur particles. The sulfur solidified body is manufactured by transporting the sulfur slurry to a prescribed place, uniformly mixing the sulfur slurry with aggregate at a normal temperature, heating the mixture to evaporate water and after that, melting the resultant sulfur. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for producing a sulfur solidified material used for reusing industrial waste as a material for civil engineering or construction, and in particular, a sulfur slurry used in a method for producing a sulfur solidified material and a method for producing the same. The present invention relates to a method for producing a sulfur solidified body using this sulfur slurry.

  Conventionally, various attempts have been made to effectively use substances discharged as industrial waste as civil engineering and construction materials. Examples of industrial waste include fly ash generated at a coal-fired power plant, municipal waste incineration ash, and steelmaking slag by-produced during iron making.

  However, if such industrial waste is used as it is as civil engineering / building materials, for example, aggregates, harmful substances such as heavy metals contained in industrial waste may flow out into the environment after construction. Therefore, when industrial waste is reused as civil engineering and building materials, the melting point is as low as 112.8 ° C, and it is combined with sulfur that is solid and chemically stable at room temperature. A method of reusing has been proposed (for example, Patent Document 1).

In this method, sulfur is melted at a high temperature of about 150 ° C., industrial waste is kneaded using this, and the resulting kneaded product is cooled to produce a solidified sulfur. Used as a binding agent for heavy metals in industrial waste. As the sulfur used at this time, for example, molten sulfur obtained as a by-product in a desulfurization step during petroleum refining is used. However, since sulfur has a low flash point of 207 ° C. and is an ignitable substance, sulfur is stored in a molten state in a dedicated tank installed in an oil refinery. Therefore, it is desirable to install the apparatus for producing the above-mentioned sulfur solidified body in an oil refinery factory or the like.
Japanese Patent No. 1319603

  However, since industrial waste such as fly ash, municipal waste incineration ash, and steelmaking slag is generated in various places, it may be more convenient to install a sulfur solidified body manufacturing apparatus at the generation location. In such a case, sulfur must be transported from oil refineries to various locations. Conventional methods for transporting sulfur include special transport methods for molten sulfur, such as dedicated tankers and dedicated tank vehicles. Therefore, the method is limited to a method performed only in a state of being stored at a high temperature. Therefore, the transportation cost is high and the handling is troublesome, so it cannot be easily transported to various places. For this reason, the production apparatus for producing the above-mentioned sulfur solidified body has an installation place restriction such as having to be installed in an oil refinery factory, for example.

  On the other hand, when producing a sulfur solidified body with the above-mentioned production apparatus, industrial waste that has been sufficiently heated is mixed, and then the industrial waste that has been heated is brought into contact with the molten sulfur and the industrial waste is brought into contact with the molten sulfur. A method has been proposed in which the kneaded product is molded into a predetermined shape and then cooled to produce a solidified sulfur. However, in this method, when kneading of molten sulfur and industrial waste is insufficient, kneading of industrial waste with sulfur becomes insufficient, so that sulfur and industrial waste are mixed uniformly. Requires a sufficient kneading time at high temperatures. In addition, in this method, when the industrial waste is not sufficiently preheated, a partial solidification of sulfur occurs at the time of kneading, so that a uniform sulfur solidified product cannot be obtained even if the kneading treatment time is sufficient. There is also.

  The present invention has been made starting from solving the above-described problems of the prior art, and the purpose thereof is, for example, the installation of a production facility for sulfur solidified material adjacent to a place where industrial waste is generated. Is to provide sulfur in the form of a sulfur slurry suitable for the production of a sulfur solidified body. Another object of the present invention is to provide a method for producing a sulfur slurry. Furthermore, another object of the present invention is to provide a method for producing a sulfur solidified body using a sulfur slurry.

  In order to achieve the above object, a method for producing a sulfur slurry according to an embodiment of the present invention has the following configuration. That is, a method for producing a sulfur slurry, in which a step of spraying an aqueous solution containing a surfactant from a nozzle, a step of spraying molten sulfur from a nozzle, and contacting the sprayed molten sulfur and the sprayed aqueous solution And a step of forming a sulfur slurry in which sulfur particles are dispersed in the aqueous solution.

  In order to achieve the above object, a method for producing a sulfur slurry according to an embodiment of the present invention has the following configuration. That is, a method for producing a sulfur slurry, a step of forming an aqueous solution containing a surfactant, a step of spraying molten sulfur from a nozzle, and bringing the sprayed molten sulfur into contact with the aqueous solution into the aqueous solution. And a step of forming a sulfur slurry in which sulfur particles are dispersed.

  In order to achieve the above object, a method for producing a sulfur slurry according to an embodiment of the present invention has the following configuration. That is, a method for producing a sulfur slurry, a step of forming an aqueous solution containing a surfactant, a step of pulverizing sulfur, and contacting the pulverized sulfur with the aqueous solution to disperse sulfur particles in the aqueous solution Forming a sulfur slurry thus formed.

  Here, for example, the sulfur slurry preferably contains 50 to 80% by weight of sulfur fine particles.

  Here, for example, the sulfur slurry preferably includes sulfur particles having an average particle size of 500 μm or less.

  Here, for example, the sulfur slurry preferably contains 0.01 to 1.0% by weight of a surfactant.

  Here, for example, the portion of the nozzle that contacts the molten sulfur is preferably covered with a fluororesin.

  Here, for example, the average particle diameter of the sulfur particles is preferably 500 μm or less.

  Here, for example, the sulfur slurry preferably contains 50 to 80% by weight of the sulfur particles.

  Here, for example, the sulfur slurry preferably contains 0.01 to 1.0% by weight of a surfactant.

  In order to achieve the above object, a method for producing a sulfur solidified product according to an embodiment of the present invention has the following configuration. That is, a method for producing a sulfur solidified product, comprising: a step of spraying an aqueous solution containing a surfactant from a nozzle; a step of spraying molten sulfur from a nozzle; and the sprayed molten sulfur and the sprayed aqueous solution. A step of forming a sulfur slurry in which the sulfur particles are dispersed in the aqueous solution by contacting, a step of mixing the sulfur slurry and aggregate at room temperature to form a mixture, and heating the mixture to form moisture. And a step of melting the sulfur particles to form a melt-kneaded product, and a step of cooling and solidifying the melt-kneaded product to produce a sulfur solidified product.

  In order to achieve the above object, a method for producing a sulfur solidified product according to an embodiment of the present invention has the following configuration. That is, a method for producing a sulfur solidified body, which includes a step of forming an aqueous solution containing a surfactant, a step of spraying molten sulfur from a nozzle, and contacting the sprayed molten sulfur with the aqueous solution in the aqueous solution. Forming a sulfur slurry in which sulfur particles are dispersed in, mixing the sulfur slurry and aggregate at room temperature to form a mixture, heating the mixture to remove moisture, and melting the sulfur particles And a step of forming a molten kneaded product and a step of cooling and solidifying the molten kneaded product to produce a sulfur solidified product.

  In order to achieve the above object, a method for producing a sulfur solidified product according to an embodiment of the present invention has the following configuration. That is, a method for producing a sulfur solidified body, wherein a step of forming an aqueous solution containing a surfactant, a step of pulverizing sulfur, and contacting the pulverized sulfur with the aqueous solution to form sulfur particles in the aqueous solution. A step of forming a dispersed sulfur slurry; a step of mixing the sulfur slurry and aggregate at room temperature to form a mixture; and heating the mixture to remove moisture to melt the sulfur particles to melt and mix. It has the process of forming a smelt, and the process of producing | generating a sulfur solidified body by cooling and solidifying the said melt kneaded material, It is characterized by the above-mentioned.

  Here, for example, in a kneading container used when forming the melt-kneaded product, it is preferable that a portion that comes into contact with the aggregate-containing slurry is covered with a fluororesin.

  Here, for example, the sulfur slurry preferably contains 50 to 80% by weight of sulfur particles.

  Here, for example, the sulfur slurry preferably includes sulfur particles having an average particle size of 500 μm or less.

  Here, for example, the sulfur slurry preferably contains 0.01 to 1.0% by weight of a surfactant.

  Here, for example, the portion of the nozzle that contacts the molten sulfur is preferably covered with a fluororesin.

  Here, for example, the sulfur solidified body preferably contains 50 to 90% by weight of the aggregate.

  Here, for example, the aggregate preferably includes industrial waste or at least one of coal ash, municipal waste incineration ash, and steel slag.

  In order to achieve the above object, a method for producing a sulfur solidified product according to an embodiment of the present invention has the following configuration. That is, a method for producing a sulfur solidified body, comprising: a step of mixing a sulfur slurry in which sulfur particles are dispersed in an aqueous solution containing a surfactant and an aggregate at room temperature to form a mixture; and heating the mixture Then, it has a step of removing moisture and melting the sulfur particles to form a molten kneaded product, and a step of cooling and solidifying the molten kneaded product to produce a sulfur solidified product.

  According to the present invention, it is possible to provide sulfur necessary for the production of a sulfur solidified body in the form of a sulfur slurry in which sulfur particles are highly dispersed. Adjacent can be facilitated. Moreover, according to this invention, the manufacturing method of sulfur slurry can be provided. Furthermore, according to the present invention, by using this sulfur slurry, it is possible to provide a method for producing a sulfur solidified body in which mixing of sulfur and aggregate is easy.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the components, numerical values, and the like described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified.

  First, the “sulfur slurry” used below will be described. The “sulfur slurry” refers to an aqueous solution in which sulfur particles of 500 μm or less are uniformly dispersed in an aqueous solution containing a surfactant or the like and are in a suspended state.

[Production of solidified sulfur: Fig. 1]
With reference to FIG. 1, the outline | summary is demonstrated about the manufacturing method of the sulfur slurry of this embodiment, and the sulfur solidification body using this sulfur slurry.

  As shown in FIG. 1, the feature of the present invention is that sulfur necessary for the production of the sulfur solidified body is produced as a sulfur slurry suitable for the production of the sulfur solidified body, and then the sulfur solidified body is produced using this sulfur slurry. It is to be. At this time, the manufacture 100 of the sulfur slurry is performed, for example, in a place where the molten sulfur is easily available, and the manufacture 200 of the sulfur solidified body using the sulfur slurry is, It can be done at the place of occurrence. That is, the manufacturing equipment used for the manufacturing 100 of the sulfur slurry is installed in a place where the molten sulfur as a raw material is easily available, for example, in an oil refining factory, and used for the manufacturing 200 of the sulfur solidified body using the sulfur slurry. The facility can be installed at a place where industrial waste used as an aggregate raw material for the sulfur solidified body or at a place adjacent to a garbage incineration plant.

  Usually, since the oil refinery factory and the place where the industrial waste is generated are separated, the sulfur slurry used in the production of the sulfur solidified body 200 is filled with the sulfur slurry produced in the sulfur slurry production 100 in a drum can. Transport to destination by truck 300 or the like. At this time, since the sulfur slurry filled in the drum can be transported at room temperature, it is not necessary to transport the molten sulfur by a dedicated tanker or a dedicated tank vehicle as in the prior art. Therefore, the transportation cost can be reduced and the handling thereof is simplified, so that the sulfur slurry can be easily transported to various places.

  Further, in the production of the sulfur solidified body 200, when the sulfur solidified body is produced, the molten sulfur and the aggregate industrial waste, which are conventionally used, are not directly mixed at a high temperature, but are uniformly formed into fine particles. The sulfur fine particles and the aggregate can be uniformly mixed at room temperature simply by mixing the aggregate industrial waste into the sulfur slurry dispersed in the slurry. Therefore, the sulfur fine particles and the aggregate can be easily and uniformly mixed at room temperature in a short time, and a uniform sulfur solidified body can be easily obtained by removing moisture from the mixture and further melting the sulfur.

<Manufacture of sulfur slurry>
Next, the manufacturing method of the above-described sulfur slurry will be described in detail.

[material]
Water, sulfur, and a surfactant are used as the raw material for the sulfur slurry.

[water]
Water is used as an aqueous solution mixed with a surfactant. This aqueous solution may be sprayed with a dedicated spray nozzle so as to be suitable for mixing with molten sulfur to be used as fine droplets, for example, 500 μm or less, or mixed with a surfactant in a predetermined container. An aqueous solution may be used.

[sulfur]
Sulfur may be naturally obtained or obtained by a desulfurization process in various factories, and can be used in a liquid state or a solid state. For example, the molten sulfur by-produced in the desulfurization process at the time of petroleum refining can be used as it is, or the molten sulfur can be solidified and then melted again for use. The sulfur contained in the sulfur slurry is desirably highly dispersed as sulfur particles having a particle size of 500 μm or less.

[When spraying molten sulfur into fine particles]
In the case of preparing sulfur particles from molten sulfur, for example, molten sulfur is directly injected from a dedicated injection nozzle as a droplet of 500 μm or less, and this droplet is a droplet of an aqueous solution injected by a dedicated injection nozzle, for example, By contacting with 100 to 200 μm, molten sulfur may be solidified to form a sulfur slurry in which sulfur particles are highly dispersed. Alternatively, the sulfur slurry in which the sulfur particles are highly dispersed by solidifying the molten sulfur by bringing the molten sulfur, which is made into droplets of 500 μm or less by a dedicated injection nozzle, into contact with an aqueous solution containing a surfactant contained in a predetermined container. May be formed.

[When molten sulfur is solidified and crushed into fine particles]
In addition, instead of directly injecting molten sulfur from the injection nozzle into droplets of 500 μm or less as described above, the molten sulfur is once solidified into a lump (for example, a fist size size) and then solidified. The lump may be pulverized into fine particles of 500 μm or less, and contacted with an aqueous solution containing a surfactant contained in a predetermined container to form a sulfur slurry in which sulfur particles are highly dispersed.

  The sulfur concentration contained in the sulfur slurry is 50 to 80% by weight, preferably 60 to 75% by weight, based on the total amount of [water + sulfur]. When sulfur is 50 weight% or less, a sulfur slurry viscosity is too low, sulfur particles settle, and a preferable sulfur slurry cannot be obtained. Further, when the sulfur content is 80% by weight or more, the sulfur slurry viscosity is too high and lacks fluidity, so that a preferable sulfur slurry cannot be obtained. For example, when transferring a sulfur slurry by piping, the transportability in piping will fall remarkably.

[Surfactant]
In order to produce a high-concentration sulfur slurry containing a large amount of sulfur necessary for producing a sulfur solidified body, and to prevent aggregation and settling of sulfur particles, it is essential to add a surfactant as a dispersant. As the surfactant, an anionic surfactant and a nonionic surfactant act effectively, and thus each surfactant may be used alone or in combination.

  As the anionic surfactant, for example, a commercially available polymer anionic polystar OM, Marialim AKM-0531 (trade name, manufactured by NOF Corporation) can be used, and as the nonionic surfactant, For example, polyoxyethylene sorbitan ester-based Nissan Nonion OT-221, LT-221, ST-221 (trade name, manufactured by NOF Corporation) and the like can be used.

  The surfactant is added in an amount of 0.01 to 1.0% by weight, preferably 0.05 to 0.5% by weight, based on the total amount of [water + sulfur]. When the addition amount of the surfactant is 0.01% by weight or less, the affinity between water and sulfur is insufficient, and it is difficult to obtain a slurry with excellent fluidity. Since the degree of wetting becomes excessive, the state of the sulfur slurry tends to collapse.

[Method for producing sulfur slurry]
As a manufacturing method of the sulfur slurry using the raw material demonstrated above, (1) Sulfur slurry is manufactured from the sulfur particle (henceforth abbreviated spraying sulfur) obtained by spraying molten sulfur from a dedicated injection nozzle. And (2) a method of producing a sulfur slurry from sulfur particles obtained by solidifying molten sulfur once and then pulverizing (hereinafter sometimes abbreviated as pulverized sulfur). Hereinafter, the manufacturing method of a sulfur slurry is demonstrated sequentially.

[When sprayed sulfur is used: Fig. 2]
A method for producing a sulfur slurry by spraying molten sulfur from a dedicated injection nozzle using a sulfur slurry producing apparatus shown in FIG. 2 will be described. In the sulfur slurry production apparatus of FIG. 2, solid sulfur supplied from the sulfur input port 19 to the sulfur supply unit 11 is melted by the heater 12 and finely sprayed from the sulfur spray nozzle 14 to 500 μm or less using the pressure air cylinder 13. Atomized molten sulfur is sprayed. On the other hand, water containing a surfactant is supplied from the storage tank 15 to the water spray nozzle 17 using the diaphragm pump 16 and sprays water droplets atomized to 500 μm or less, for example, 100 to 200 μm. As the water spray nozzle 17 and the sulfur spray nozzle 14, for example, a full cone nozzle or a full pyramid nozzle (manufactured by Ikeuchi Co., Ltd.) can be used. Each nozzle diameter is, for example, 3.5 mmφ, and each nozzle hole diameter is, for example, 1.0 mmφ. The injection amount and injection pressure from the sulfur spray nozzle 14 and the water spray nozzle 17 can be arbitrarily set. For example, the injection amount of molten sulfur is 8 to 10 L / min, and the injection amount of water is 1 to 2 L. a / min, injection pressure is molten sulfur is 2-4 kg / cm ^2, water is 2~3.5kg / cm ^2.

  Next, by bringing the sprayed aqueous solution and molten sulfur into contact with each other in a sulfur slurry production container, the molten sulfur is cooled and solidified by the sprayed aqueous solution to form a sulfur slurry. Here, the portion in contact with the sulfur slurry in the sulfur slurry production vessel is preferably Teflon (registered trademark) processed.

  The above-described production of the sulfur slurry is an example. For example, instead of injecting water containing a surfactant, it is placed in a sulfur slurry production vessel and stirred, and the water containing the surfactant being stirred is put into the water containing the surfactant. A sulfur slurry may be produced by injecting molten sulfur.

  The particle size of the sulfur particles contained in the obtained sulfur slurry is 500 μm or less, and the sulfur concentration is 50 to 80% by weight, preferably 60 to 75% by weight, based on the total amount of [water + sulfur]. The surfactant is contained in an amount of 0.01 to 1.0% by weight, preferably 0.05 to 0.5% by weight, based on the total amount of [water + sulfur].

[When pulverized sulfur is used): FIG. 10]
Next, a method for producing a sulfur slurry from sulfur particles obtained by solidifying molten sulfur once and then pulverizing will be described with reference to a method for producing sulfur slurry shown in FIG. First, the molten sulfur 23 produced as a by-product in a desulfurization process at the time of petroleum refining is kneaded and solidified to a large lump size, and this lump is collected (solidification process 25). Next, the collected lump is pulverized to a size of several mm with a crusher (for example, Makino hammer crusher, EE-300-3.7 (Ogino Sangyo Co., Ltd.)) (coarse pulverization step 26), In a pulverizer (for example, Makino-type pulverizer, DD-2-3.7 (Ogino Sangyo Co., Ltd.)), pulverization is performed to a particle size of 500 μm or less (a fine pulverization step 27). Means that after the dispersant 21 is mixed so as to have a predetermined concentration to form an aqueous solution (mixing step 24), this aqueous solution is put into a sulfur slurry production container 18 as shown in FIG. Next, a sulfur slurry is formed by adding a predetermined amount of sulfur particles pulverized to a particle size of 500 μm or less into the agitated and mixed aqueous solution. Included in The particle size of the sulfur particles is 500 μm or less, and the sulfur concentration is 50 to 80% by weight, preferably 60 to 75% by weight, based on the total amount of [water + sulfur]. + Sulphur] is included in an amount of 0.01 to 1.0% by weight, preferably 0.05 to 0.5% by weight.

[Evaluation of sulfur slurry]
Next, performance evaluation of the sulfur slurry produced by the above production method will be described. The performance of the sulfur slurry was 1) a solid-liquid separation evaluation test, 2) a foaming state evaluation test, 3) a fluidity evaluation test, and evaluated each performance, and further passed three evaluation tests as a comprehensive evaluation. This was a sulfur slurry suitable for the production of a sulfur solidified body. Each test method and its evaluation criteria are shown below.

(1) Solid-liquid separation evaluation test 300 ml of the prepared sulfur slurry was filled in a 500 ml graduated cylinder (JIS R3505), left to stand, and evaluated after observing the solid-liquid separation state after 18 hours and storage for 6 months. Judgment criteria are shown below.
○ (Good separation): 30 ml or less of solid / liquid separation layer Δ: 30-100 ml of solid / liquid separation layer
X (Poor separation): Solid-liquid separation layer is 100 ml or more

(2) Evaluation test of foaming state The prepared sulfur slurry was filled in 300 ml of a 500 ml full volume flask (JIS R3505), sealed with cork and immediately shaken vigorously for 30 seconds, and after standing for 6 months, the foaming state was evaluated. . Judgment criteria are shown below.
○ (Good foaming property): No bubbles are observed (no foaming state)
△: Foamed all over but no foam within 5 minutes x (poor foaming property): Foam does not disappear

(3) Evaluation of fluidity Immediately after preparing a sulfur slurry and filling it into a 500 ml polyethylene container and after storage for 6 months, the viscosity is rotated by a method using a Brookfield rotary viscometer (JIS K7117-1). The number was measured at 6 rpm and 60 rpm, and the TI value (thixotropic index) obtained by the following formula was evaluated as a measure of fluidity.
TI value = viscosity at low rotation (6 rpm) / viscosity at high rotation (60 rpm)
○ (Good fluidity): TI value of 5 or less (Newtonian fluid)
X (poor fluidity): TI value of 5 or more (non-Newtonian fluid, thixotropy)

<Manufacture of sulfur solidified body>
Next, a method for producing a sulfur solidified body using the produced sulfur slurry will be described.

[material]
Sulfur (sulfur slurry) and aggregate are used as a raw material for the sulfur solidified body.

[sulfur]
The sulfur slurry prepared above, that is, a slurry in which sulfur particles of 500 μm or less are highly dispersed in an aqueous solution containing a surfactant is used.

[aggregate]
As the industrial waste that can be used as the aggregate of the sulfur solidified body, various industrial wastes containing various heavy metals can be used. For example, steel slag such as steel slag produced as a by-product during steelmaking, steelmaking dust, municipal waste incineration ash, and coal ash (incineration ash, fly ash) discharged from coal-fired power generation facilities are used alone or in combination. be able to.

[Production method of sulfur solidified body: Fig. 3]
It demonstrates using the manufacturing method of the sulfur solidified body shown in FIG. As the sulfur slurry used for the production of the sulfur solidified body, the sulfur slurry 7 produced by spraying molten sulfur from a dedicated injection nozzle in the sulfur slurry production apparatus shown in FIG. 2, or as shown in FIG. After sulfur is solidified into a lump, a sulfur slurry 107 produced from sulfur particles obtained by pulverizing this lump is used. This sulfur solidified body is obtained by mixing the sulfur slurry 7 or the sulfur slurry 107 (the one in which sulfur particles of 500 μm or less are highly dispersed in an aqueous solution containing a surfactant) in the mixing step 8 in the sulfur solidified body production container. In this sulfur slurry, 1 or 2 or more aggregates selected from coal ash 4, municipal waste incineration ash 5 and steel slag 6 prepared to a predetermined particle size are put in and mixed at room temperature. In the mixing step 8, the sulfur particles uniformly and highly dispersed in the sulfur slurry 7 or the sulfur slurry 107 are used, so that uniform mixing of the aggregate and the sulfur particles can be realized at a normal temperature in a short time.

  Next, in the kneading step 9, the mixture is heated to remove moisture, and then the sulfur is melted to knead the molten sulfur and the aggregate to form a uniform molten kneaded product. Next, the molten kneaded product is formed into a predetermined shape in the forming / solidifying step 10 and then solidified to produce a sulfur solidified body. The shape and size of the molded sulfur solidified body will vary depending on the intended use, and any one can be used. For example, the sulfur solidified body may be granular or pellet-shaped, and is 1 to 5 mm as an example of the external dimensions.

[Evaluation of solidified sulfur]
In order to use the sulfur solidified body produced by the above method for producing a sulfur solidified body as an aggregate for civil engineering and construction, its mechanical properties were evaluated. As the mechanical characteristics, the compressive strength and bending strength of the sulfur solidified body were used. Here, the compressive strength was measured in accordance with the test method of JIS A1108 after molding three solidified sulfur bodies produced by the above production method into a 100φ × 200 mm cylinder. On the other hand, the bending strength was measured in accordance with the test method of JIS A1106 by molding three sulfur solid bodies produced by the above production method into 100 × 100 × 400 mm prisms.

  The performance of the sulfur slurry and sulfur solidified product produced by the production method described above will be specifically described with reference to Examples and Comparative Examples. In the following description, (1) when using a sulfur slurry produced by spraying molten sulfur from a dedicated injection nozzle, and (2) using sulfur particles obtained by solidifying molten sulfur and then pulverizing it. This will be described separately when the sulfur slurry is used.

<Performance evaluation test result of sulfur slurry and solidified sulfur using sprayed sulfur>
Initially, the case where the sulfur slurry manufactured using the sulfur particle (spray sulfur) obtained by spraying molten sulfur from a dedicated injection nozzle is described. FIG. 4 shows the formulations of Examples 1 to 13 (sprayed sulfur) prepared by the sulfur slurry manufacturing method of FIG. 2, and FIG. 5 shows the formulations of Comparative Examples 1 to 10 prepared by the same method. FIG. 6 shows the performance evaluation test results of the sulfur slurries of Examples 1-13, and FIG. 7 shows the performance evaluation test results of Comparative Examples 1-10. Moreover, the mixing | blending of the sulfur solidified body shown to these Examples 14-17 prepared using the sulfur slurry shown in Example 9 in FIG. 8, and its Comparative Examples 11-14 are shown. FIG. 9 shows the mechanical property evaluation test results of the sulfur solidified bodies of Examples 14 to 17 and Comparative Examples 11 to 14.

[Production of sulfur slurry shown in Examples 1 to 13 (FIG. 4)]
A sulfur slurry having the composition shown in Example 1 in FIG. 4 was prepared using the sulfur slurry production apparatus shown in FIG. That is, while injecting 1 kg of water containing a surfactant from a spray nozzle into a Teflon (registered trademark) processed container having a 3 L inner surface, 1 kg of molten sulfur heated to 145 to 155 ° C. The sulfur slurry in which sulfur particles of 500 μm or less were dispersed was prepared by injecting from and spraying the sprayed sulfur with water droplets and mixing them. The sulfur concentration in the sulfur slurry is 50%, and the amount of surfactant is 0.01%. As the surfactant, Marialim AKM-0531 (anionic system) was used. Next, a sulfur slurry having the composition shown in Examples 2 to 13 in FIG. 4 was prepared in the same manner as in Example 1. As the surfactant, Marialim AKM-0531 (anionic system) and / or Nissan Nonion OT-221 (nonionic system) was used.

[Production of sulfur slurry shown in Comparative Examples 1 to 10 (FIG. 5)]
By the method similar to Example 1, the sulfur slurry of the mixing | blending shown in Comparative Examples 1-10 of FIG. 6 was prepared using the sulfur slurry manufacturing apparatus shown in FIG.

[Performance evaluation results of sulfur slurry (sprayed sulfur) (Figs. 6 and 7)]
Next, with respect to the sulfur slurries of the formulations shown in Examples 1 to 13 and Comparative Examples 1 to 10, 1) a solid-liquid separation evaluation test, 2) a foaming state evaluation test, and 3) a fluidity evaluation test were performed. The results of evaluation and overall evaluation are shown in FIGS.

1) Solid-liquid separation evaluation test As shown in FIG. 6, the sulfur slurries obtained in Examples 1 to 13 were all good except for Examples 1, 6, and 11 after storage for 6 months. In Examples 1, 6 and 11, although these drops after storage for 6 months, these sulfur slurries are easily re-dispersed because the sulfur particles are uniformly dispersed just after preparation by simply stirring. Therefore, it was judged that there was no practical problem. On the other hand, as shown in Comparative Examples 1 to 5 and 7, from FIG. 7, as shown in Comparative Examples 1 to 5 and 7, when the addition rate of the surfactant is 0.01% or less or 1.0% or more, the slurry is not sufficient and separation is not possible. It was judged that it was not practical because it was remarkable.

2) Foaming state evaluation test From FIG. 6, the sulfur slurries obtained in Examples 1 to 13 were all good in the evaluation after storage for 6 months. On the other hand, in FIG. 7, as shown in Comparative Examples 4 and 7, in the comparative example, when the addition rate of the surfactant is 1.0% or more, the foam does not disappear even after 6 months and the practicality is lacking. It was judged.

3) Fluidity evaluation test From FIG. 6, the sulfur slurries obtained in Examples 1 to 13 were all in a slurry state having a TI value of 5 or less and all were good. On the other hand, from FIG. 7, as shown in Comparative Examples 5, 6, and 8 to 10, in the comparative example, when the addition rate of the surfactant is 0.01% or less or the sulfur concentration in the sulfur slurry is 80% by weight or more, TI. A value of 5 or more resulted in a paste with strong thixotropy and showed no fluidity.

  In summary, as shown in the comprehensive evaluation of FIGS. 6 and 7, the comprehensive evaluation of the sulfur slurries shown in Examples 1 to 13 was all good, and the comprehensive evaluations of Comparative Examples 1 to 10 were all poor. Furthermore, the following results are obtained from the comparison of FIGS.

  1) From Examples 1, 6, 11 and Comparative Examples 1 and 8, when the addition ratio of the surfactant to the sulfur slurry is 0.01% by weight, the sulfur concentration is preferably in the range of 50 to 80% by weight. 2) From Examples 2, 8, and 13 and Comparative Examples 2 and 10, when the addition ratio of the surfactant to the sulfur slurry is 1% by weight, the sulfur concentration is preferably in the range of 50 to 80% by weight. 3) From Examples 1 to 3, 6 to 8, and 11 to 13, the sulfur concentration in the sulfur slurry is preferably in the range of 0.01 to 1% by weight of the surfactant at 50 to 80% by weight.

  From the results of the above 1) to 3), when the sulfur concentration contained in the sulfur slurry (sprayed sulfur) is 50 to 80% by weight and the surfactant concentration is 0.01 to 1.0% by weight, it is excellent. A sulfur slurry (sprayed sulfur) is obtained.

[Production of Sulfur Solidified Body Shown in Examples 14 to 17 (FIG. 8)]
Next, using the sulfur slurry manufacturing method shown in FIG. 3, sulfur solidified bodies having the formulations shown in Examples 14 to 17 in FIG. 8 were prepared. For example, in the preparation of the sulfur solidified body having the composition shown in Example 14, the surface of the sulfur slurry having the composition shown in Example 9 in FIG. 4 (the sulfur concentration in the slurry was 75% by weight) was processed with Teflon (registered trademark). A predetermined amount of 13.3% by weight (sulphur only 10% by weight) is put in a container, and then 90% by weight of steel slag as an aggregate is kneaded at room temperature and mixed uniformly. When using steel slag as an aggregate, use steelmaking slag by-product water granulation (2 mm or less) produced as a by-product during iron making. When using coal ash, coal is used at a coal-fired power plant. The fly ash recovered when burned was used. Next, the container is heated to 100 ° C. to evaporate the moisture, and then the container is further heated to 150 ° C. to knead while melting sulfur, and the resulting uniform kneaded product is poured into a mold. Then, the sulfur solidified body was formed by allowing to cool. By the method similar to Example 14, the sulfur solidified body of the mixing | blending shown in Examples 15-17 of FIG. 8 was prepared using the sulfur slurry of the mixing | blending shown in Example 9. FIG.

[Production of Sulfur Solidified Body Shown in Comparative Examples 11 to 14 (FIG. 8)]
In order to compare with the mechanical properties of the sulfur solidified bodies prepared in Examples 14-17, the sulfur solidification shown in Comparative Examples 11-14 was performed by directly mixing the molten sulfur with the aggregate at a high temperature without using a sulfur slurry. The body was prepared. In the preparation of Comparative Examples 11-14, sulfur is used by pulverizing and solidifying molten sulfur produced as a by-product in the desulfurization process during petroleum refining, and filling the container with a predetermined amount of this pulverized sulfur. Thereafter, the container was heated to 150 ° C. to be in a molten state. Next, an aggregate preliminarily heated to 140 ° C. is added to this container to knead molten sulfur and aggregate, and the resulting uniform kneaded product is poured into a mold and allowed to cool, thereby solidifying the sulfur. Was molded.

[Performance evaluation result of solidified sulfur (sprayed sulfur) (Fig. 9)]
Next, compressive strength and bending strength were measured as mechanical properties of the obtained sulfur solidified materials of Examples 14 to 17 and Comparative Examples 11 to 14, and the results are shown in FIG.

  From comparison between Example 14 and Comparative Example 11 in FIG. 9, the compressive strength and bending strength when the aggregate in the sulfur solidified body is 90% by weight are substantially the same in Example 14 and Comparative Example 11. Similarly, from comparison between Example 15 and Comparative Example 12, the compressive strength and bending strength when the aggregate in the sulfur solidified body is 80% by weight are substantially the same in Example 15 and Comparative Example 12. Furthermore, from comparison between Example 16 and Comparative Example 13, the compressive strength and bending strength when the aggregate in the sulfur solidified body is 70% by weight are substantially the same in Example 16 and Comparative Example 13. Furthermore, from comparison between Example 17 and Comparative Example 14, the compressive strength and bending strength when the aggregate in the sulfur solidified body is 50% by weight are substantially the same in Example 17 and Comparative Example 14.

  From this, the compressive strength and bending strength of the sulfur solidified body (aggregate content: 50 to 90% by weight) prepared using sulfur slurry (sprayed sulfur) are sufficient to mix molten sulfur with aggregate at high temperature. It can be seen that there is no difference from the sulfur solidified body prepared. Therefore, when the sulfur solidified body is prepared, the sulfur particles and the aggregate can be mixed at room temperature by using a sulfur slurry in which sulfur particles of 500 μm or less are highly dispersed, so that the sulfur is uniform in the aggregate. It turned out that the sulfur solidified substance dispersed in can be easily produced.

  In addition, it turned out that the compressive strength and bending strength of a sulfur solidified body do not change even if it changes the ratio of the steel slag and the coal ash in the aggregate contained in a sulfur solidified body from said comparison result.

<Performance evaluation test results of sulfur slurry and solidified sulfur using pulverized sulfur>
Next, the case where the sulfur slurry manufactured using the sulfur particle (pulverized sulfur) obtained by solidifying molten sulfur once and then pulverizing is described. FIG. 11 shows the formulations of Examples 18 to 24 prepared by the sulfur slurry manufacturing method using pulverized sulfur shown in FIG. 10 and Comparative Examples 15 to 21 prepared by the same method. FIG. 12 shows performance evaluation test results of the sulfur slurries of Examples 18 to 24 and Comparative Examples 1 to 10. Moreover, in FIG. 13, the mixing | blending of the sulfur solidification body of this Example 25-28 prepared using the sulfur slurry shown in Example 22 and its sulfur solidification body of the comparative examples 22-25 is shown, FIG. It is a mechanical characteristic evaluation test result of the sulfur solidified body of Examples 25-28 and Comparative Examples 22-25.

[Production of sulfur slurry shown in Examples 18 to 24 (FIG. 11)]
A sulfur slurry (ground sulfur) having the composition shown in Example 18 of FIG. 11 was prepared by the method described below. The raw material sulfur used was a molten large amount of molten sulfur produced as a by-product in the desulfurization process during petroleum refining and solidified into a large-sized lump. This massive sulfur was put in a mortar having a diameter of 210 mm, pulverized with a pestle, and sulfur particles with a particle size of 500 μm or less were prepared using a 40-mesh wire mesh sieve. Next, 1 kg of water containing a predetermined amount of a surfactant is put in a 3 L enamel container, and then 1 kg of pulverized sulfur is added to this aqueous solution and uniformly mixed with a homomixer to highly disperse sulfur. A sulfur slurry (ground sulfur) having the composition shown in Example 18 was prepared. The sulfur concentration in the sulfur slurry is 50%, and the amount of surfactant is 0.01%. As the surfactant, Nissan Nonion OT-221 (nonionic) was used. Next, a sulfur slurry (ground sulfur) having the composition shown in Examples 19 to 24 in FIG. As the surfactant, Marialim AKM-0531 (anionic system) and / or Nissan Nonion OT-221 (nonionic system) was used.

[Production of Sulfur Slurry Shown in Comparative Examples 15 to 21 (FIG. 11)]
In the same manner as in Example 1, sulfur slurries (ground sulfur) having the formulations shown in Comparative Examples 15 to 21 in FIG. 11 were prepared.

[Performance evaluation result of sulfur slurry (pulverized sulfur) (Fig. 12)]
Next, 1) solid-liquid separation evaluation test, 2) bubbling state evaluation test, and 3) fluidity evaluation test were conducted for the sulfur slurries (ground sulfur) blended as shown in Examples 18-24 and Comparative Examples 15-21. FIG. 12 shows the results of evaluation and comprehensive evaluation of each test.

1) Solid-liquid separation evaluation test From FIG. 12, the sulfur slurries (crushed sulfur) obtained in Examples 18 to 24 were all good except for Example 18 after storage for 6 months. In Example 18, although it decreases after storage for 6 months, in these sulfur slurries, since the sulfur particles are uniformly dispersed just after preparation by simply stirring, the redispersibility is good and practical. Judged that there was no problem. On the other hand, in Comparative Examples 15 to 18, it was judged that practicality was lacking because solid-liquid separation was remarkable.

2) Foaming state evaluation test From FIG. 12, the sulfur slurries (crushed sulfur) obtained in Examples 18 to 24 were all good in the evaluation after storage for 6 months. Thus, when the addition rate of the surfactant was 1.0% or more, it was judged that the foam did not disappear even after 6 months and lacked practicality.

3) Fluidity evaluation test From FIG. 12, the sulfur slurry (pulverized sulfur) obtained in Examples 18 to 24 was in a slurry state with a TI value of 5 or less, and all were good. In the case of 18 to 21, it was judged that the TI value was 5 or more and the thixotropy was strong, and it did not show fluidity at all, so it was not practical.

  In summary, as shown in the overall evaluation of FIG. 12, the overall evaluation of the sulfur slurry (pulverized sulfur) shown in Examples 18 to 24 is all good, and the overall evaluation of Comparative Examples 15 to 21 is all poor. It was. Furthermore, the following results are obtained from the comparison of FIG.

1) From Examples 18 and 23 and Comparative Examples 15 and 20, when the addition ratio of the surfactant to the sulfur slurry is 0.01% by weight, the sulfur concentration is preferably in the range of 50 to 75% by weight. 2) From Examples 19 and 24 and Comparative Examples 16 and 21, when the addition ratio of the surfactant to the sulfur slurry is 1% by weight, the sulfur concentration is preferably in the range of 50 to 80% by weight. 3) From Examples 18, 19, 23, and 24, the sulfur concentration in the sulfur slurry is preferably in the range of 0.01 to 1% by weight of the surfactant at 50 to 80% by weight.

  From the results of the above 1) to 3), it was excellent when the sulfur concentration contained in the sulfur slurry (pulverized sulfur) was 50 to 80% by weight and the surfactant concentration was 0.01 to 1.0% by weight. A sulfur slurry (ground sulfur) is obtained.

[Production of Sulfur Solidified Body Shown in Examples 25 to 28 (FIG. 13)]
Next, using the pulverized sulfur slurry (pulverized sulfur) of Example 22, using the method for producing a sulfur solidified body shown in FIG. 3, a sulfur solidified body having the composition shown in Examples 25 to 28 of FIG. 13 was prepared. For example, in the preparation of the sulfur solidified body having the composition shown in Example 25, the sulfur slurry having the composition shown in Example 22 (sulfur concentration of 75% by weight in the slurry) was placed in a container whose surface was processed with Teflon (registered trademark). A fixed amount of 13.3% by weight (sulphur only 10% by weight) is added, followed by 90% by weight of steel slag as an aggregate and kneaded at room temperature to mix uniformly. In addition, steel slag as aggregate uses the steelmaking slag by-product processing granulation (2mm or less) by-product during iron making, and when using coal ash, when coal is burned at a coal-fired power plant The recovered fly ash was used. Next, the container is heated to 100 ° C. to evaporate the moisture, and then the container is further heated to 150 ° C. to knead while melting sulfur, and the resulting uniform kneaded product is poured into a mold. Then, the sulfur solidified body was formed by allowing to cool. By the method similar to Example 25, the sulfur solidified body of the mixing | blending shown to Examples 26-28 of FIG. 13 was prepared using the sulfur slurry (ground sulfur) of the mixing | blending shown in Example 22. FIG.

[Production of Sulfur Solidified Body Shown in Comparative Examples 22 to 25 (FIG. 13)]
In order to compare with the mechanical properties of the sulfur solidified bodies prepared in Examples 25 to 28, Comparative Examples 22 to 25 were prepared by directly mixing molten sulfur with the aggregate at a high temperature without using a sulfur slurry (pulverized sulfur). The sulfur solidified body shown in FIG. In the preparation of Comparative Examples 22 to 25, sulfur is used by pulverizing and solidifying molten sulfur produced as a by-product in the desulfurization process during petroleum refining, and filling the container with a predetermined amount of this pulverized sulfur. Thereafter, the container was heated to 150 ° C. to be in a molten state. Next, an aggregate preliminarily heated to 140 ° C. is added to this container to knead molten sulfur and aggregate, and the resulting uniform kneaded product is poured into a mold and allowed to cool, thereby solidifying the sulfur. Was molded.

[Performance evaluation result of sulfur solidified body (pulverized sulfur) (Fig. 14)]
Next, compressive strength and bending strength were measured as mechanical properties of the obtained sulfur solidified materials of Examples 25 to 28 and Comparative Examples 22 to 25, and the results are shown in FIG.

  From the comparison between Example 25 and Comparative Example 22 in FIG. 14, the compressive strength and bending strength when the aggregate in the sulfur solidified body is 90% by weight are substantially the same in Example 25 and Comparative Example 22. Similarly, from the comparison between Example 26 and Comparative Example 23, the compressive strength and bending strength when the aggregate in the sulfur solidified body is 80% by weight are almost the same in Example 26 and Comparative Example 23. Further, from the comparison between Example 27 and Comparative Example 24, the compressive strength and bending strength when the aggregate in the sulfur solidified body is 70% by weight are almost the same in Example 27 and Comparative Example 24. Furthermore, from a comparison between Example 28 and Comparative Example 25, the compressive strength and bending strength when the aggregate in the sulfur solidified body is 50% by weight are substantially the same in Example 28 and Comparative Example 25.

  From this, the compression strength and the bending strength of the sulfur solidified body (aggregate content: 50 to 90% by weight) prepared using sulfur slurry (ground sulfur) are sufficient to mix molten sulfur with the aggregate at high temperature. It can be seen that there is no difference from the sulfur solidified body prepared. Therefore, when the sulfur solidified body is prepared, the sulfur particles and the aggregate can be mixed at room temperature by using a sulfur slurry in which sulfur particles of 500 μm or less are highly dispersed, so that the sulfur is uniform in the aggregate. It was found that a sulfur-solidified product having excellent mechanical properties dispersed in can be easily produced.

[Summary]
As explained above, the sulfur slurry produced using sprayed sulfur and pulverized sulfur and the sulfur solidified product produced using these sulfur slurries have the following advantages. That is,
(1) As a method for producing a sulfur slurry in which sulfur particles of 500 μm or less are highly dispersed, a method in which molten sulfur is directly sprayed from an injection nozzle to generate sulfur particles, or a molten sulfur is solidified and then finely pulverized to form sulfur. Various production methods such as a method for obtaining particles can be used. This sulfur slurry can be easily transported to a place where industrial waste is generated at various temperatures using ordinary means of transportation such as trucks at room temperature. Can be widened. Moreover, compared with the case where the molten sulfur is transported in a state where it is stored at a high temperature by a dedicated tank vehicle or the like, safety management in transportation is facilitated, and the transportation cost can be reduced. (2) When a sulfur solidified product is produced using a sulfur slurry in which sulfur particles of 500 μm or less produced by the above method are highly dispersed, the aggregate and the sulfur can be easily and uniformly mixed at room temperature, thus providing excellent mechanical properties. Sulfur solidified product can be easily produced.

It is a figure explaining manufacture of the sulfur solidified body using the sulfur slurry and sulfur slurry of this invention. It is a figure which shows an example of the sulfur slurry manufacturing apparatus (spray sulfur) of this invention. It is a figure which shows an example of the manufacturing method of the sulfur solidified body of this invention. It is a figure which shows the example of a mixing | blending of the sulfur slurry (spray sulfur) of the Example of this invention. It is a figure which shows the compounding example of the sulfur slurry (spray sulfur) of a comparative example. It is a figure which shows the performance test result of the sulfur slurry (spray sulfur) of the Example of this invention. It is a figure which shows the performance test result of the sulfur slurry (spray sulfur) of a comparative example. It is a figure which shows the compounding example of the sulfur solidified body manufactured using the sulfur slurry (spray sulfur) of this invention, and the sulfur solidified body of a comparative example. It is a figure which shows the performance test result of the sulfur solidified body manufactured using the sulfur slurry (spray sulfur) of this invention, and the sulfur solidified body of a comparative example. It is a figure which shows an example of the manufacturing process of the sulfur slurry (pulverized sulfur) of this invention. It is a figure which shows the example of a mixing | blending of the sulfur slurry (crushed sulfur) of the Example and comparative example of this invention. It is a figure which shows the performance test result of the sulfur slurry (pulverized sulfur) of the Example and comparative example of this invention. It is a figure which shows the compounding example of the sulfur solidified body manufactured using the sulfur slurry (ground sulfur) of this invention, and the sulfur solidified body of a comparative example. It is a figure which shows the performance test result of the sulfur solidified body manufactured using the sulfur slurry (pulverized sulfur) of this invention, and the sulfur solidified body of a comparative example.

Explanation of symbols

1 Dispersant 2 Water 3 Molten sulfur 4 Coal ash 5 Municipal waste incineration ash 6 Steel slag 7 Sulfur slurry 8 Mixing process 9 Kneading process (moisture removal, sulfur melting)
10 Molding / solidification process (sulfur solidified body)
DESCRIPTION OF SYMBOLS 11 Sulfur supply part 12 Heating heater 13 Air cylinder 14 for pressure feeding Sulfur injection nozzle 15 Storage tank 16 Diaphragm pump 17 Spray nozzle for water 18 Sulfur slurry production container 19 Sulfur input port 100 Production of sulfur slurry (petroleum refinery etc.)
DESCRIPTION OF SYMBOLS 101 Dispersant 102 Water 103 Molten sulfur 104 Bulk solidified body 105 Grinding process 107 Sulfur slurry 200 Production of sulfur solidified body using sulfur slurry (industrial waste generation place, etc.)
300 tracks

Claims (23)

A method for producing a sulfur slurry, comprising:
Spraying an aqueous solution containing a surfactant from a nozzle;
Spraying molten sulfur from a nozzle;
Contacting the sprayed molten sulfur with the sprayed aqueous solution to form a sulfur slurry in which sulfur particles are dispersed in the aqueous solution;
A method for producing a sulfur slurry, comprising: A method for producing a sulfur slurry, comprising:
Forming an aqueous solution containing a surfactant;
Spraying molten sulfur from a nozzle;
Contacting the sprayed molten sulfur with the aqueous solution to form a sulfur slurry in which sulfur particles are dispersed in the aqueous solution;
A method for producing a sulfur slurry, comprising: A method for producing a sulfur slurry, comprising:
Forming an aqueous solution containing a surfactant;
Crushing sulfur;
Contacting the pulverized sulfur with the aqueous solution to form a sulfur slurry in which sulfur particles are dispersed in the aqueous solution;
A method for producing a sulfur slurry, comprising:   The method for producing a sulfur slurry according to any one of claims 1 to 3, wherein the sulfur slurry contains 50 to 80% by weight of sulfur fine particles.   The said sulfur slurry contains the sulfur particle whose average particle diameter is 500 micrometers or less, The manufacturing method of the sulfur slurry of any one of Claim 1 thru | or 4 characterized by the above-mentioned.   The said sulfur slurry contains 0.01 to 1.0 weight% of surfactant, The manufacturing method of the sulfur slurry of any one of Claim 1 thru | or 5 characterized by the above-mentioned.   The method for producing a sulfur slurry according to any one of claims 1 to 6, wherein a portion of the nozzle that comes into contact with the molten sulfur is coated with a fluororesin. A surfactant,
water and,
Sulfur particles,
A sulfur slurry containing
The sulfur slurry, wherein the sulfur particles are dispersed in the sulfur slurry.   The sulfur slurry according to claim 8, wherein an average particle diameter of the sulfur particles is 500 μm or less.   The sulfur slurry according to claim 8 or 9, wherein the sulfur slurry contains 50 to 80 wt% of the sulfur particles.   The sulfur slurry according to any one of claims 8 to 10, wherein the sulfur slurry contains 0.01 to 1.0 wt% of a surfactant. A method for producing a sulfur solidified body, comprising:
Spraying an aqueous solution containing a surfactant from a nozzle;
Spraying molten sulfur from a nozzle;
Forming a sulfur slurry in which the sulfur particles are dispersed in the aqueous solution by contacting the sprayed molten sulfur with the sprayed aqueous solution;
Mixing the sulfur slurry and aggregate at room temperature to form a mixture;
Heating the mixture to remove moisture and melting the sulfur particles to form a melt kneaded product;
Cooling and solidifying the melt-kneaded product to produce a sulfur solidified product,
A process for producing a sulfur solidified product, comprising: A method for producing a sulfur solidified body, comprising:
Forming an aqueous solution containing a surfactant;
Spraying molten sulfur from a nozzle;
Contacting the sprayed molten sulfur with the aqueous solution to form a sulfur slurry in which sulfur particles are dispersed in the aqueous solution;
Mixing the sulfur slurry and aggregate at room temperature to form a mixture;
Heating the mixture to remove moisture and melting the sulfur particles to form a melt kneaded product;
Cooling and solidifying the melt-kneaded product to produce a sulfur solidified product,
A process for producing a sulfur solidified product, comprising: A method for producing a sulfur solidified body, comprising:
Forming an aqueous solution containing a surfactant;
Crushing sulfur;
Contacting the pulverized sulfur with the aqueous solution to form a sulfur slurry in which sulfur particles are dispersed in the aqueous solution;
Mixing the sulfur slurry and aggregate at room temperature to form a mixture;
Heating the mixture to remove moisture and melting the sulfur particles to form a melt kneaded product;
Cooling and solidifying the melt-kneaded product to produce a sulfur solidified product,
A process for producing a sulfur solidified product, comprising:   15. The kneading container used for forming the melt-kneaded product is coated with a fluororesin at a portion in contact with the aggregate-containing slurry. The manufacturing method of the sulfur solidified body of 1 item | term.   The method for producing a sulfur solidified body according to any one of claims 12 to 15, wherein the sulfur slurry contains 50 to 80% by weight of sulfur particles.   The method for producing a solidified sulfur according to any one of claims 12 to 16, wherein the sulfur slurry includes sulfur particles having an average particle size of 500 µm or less.   The method for producing a sulfur solidified body according to any one of claims 12 to 17, wherein the sulfur slurry contains 0.01 to 1.0% by weight of a surfactant.   The method for producing a sulfur solidified body according to any one of claims 12 to 18, wherein a portion of the nozzle that comes into contact with the molten sulfur is coated with a fluororesin.   The method for producing a sulfur solidified body according to any one of claims 12 to 14, wherein the sulfur solidified body contains 50 to 90 wt% of the aggregate.   The method for producing a sulfur solidified body according to any one of claims 12 to 14, wherein the aggregate is an industrial waste.   The method for producing a solidified sulfur according to any one of claims 12 to 14, wherein the aggregate includes at least one of coal ash, municipal waste incineration ash, and steel slag. A method for producing a sulfur solidified body, comprising:
A step of mixing a sulfur slurry in which sulfur particles are dispersed in an aqueous solution containing a surfactant and an aggregate at room temperature to form a mixture;
Heating the mixture to remove moisture and melting the sulfur particles to form a melt kneaded product;
Cooling and solidifying the melt-kneaded product to produce a sulfur solidified product,
A process for producing a sulfur solidified product, comprising:

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