WO2006104227A1 - 材料の含水比調整方法 - Google Patents
材料の含水比調整方法 Download PDFInfo
- Publication number
- WO2006104227A1 WO2006104227A1 PCT/JP2006/306982 JP2006306982W WO2006104227A1 WO 2006104227 A1 WO2006104227 A1 WO 2006104227A1 JP 2006306982 W JP2006306982 W JP 2006306982W WO 2006104227 A1 WO2006104227 A1 WO 2006104227A1
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- WO
- WIPO (PCT)
- Prior art keywords
- water content
- bentonite
- stirring tank
- stirring
- fine particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
- B28C7/0023—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust by heating or cooling
- B28C7/0038—Cooling, e.g. using ice
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/53—Mixing liquids with solids using driven stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/60—Mixing solids with solids
- B01F23/66—Mixing solids with solids by evaporating or liquefying at least one of the components; using a fluid which is evaporated after mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
- B01F23/702—Cooling materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
- B01F23/709—Freezing materials, e.g. to mix them in solid state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
- B01F23/711—Heating materials, e.g. melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
- B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
- B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
- B01F25/31422—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the axial direction only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C3/00—Apparatus or methods for mixing clay with other substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/46—Arrangements for applying super- or sub-atmospheric pressure during mixing; Arrangements for cooling or heating during mixing, e.g. by introducing vapour
- B28C5/468—Cooling, e.g. using ice
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/02—Controlling the operation of the mixing
- B28C7/022—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component
- B28C7/024—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component by measuring properties of the mixture, e.g. moisture, electrical resistivity, density
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/02—Controlling the operation of the mixing
- B28C7/022—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component
- B28C7/026—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component by measuring data of the driving system, e.g. rotational speed, torque, consumed power
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62625—Wet mixtures
- C04B35/6263—Wet mixtures characterised by their solids loadings, i.e. the percentage of solids
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/16—Processing by fixation in stable solid media
- G21F9/162—Processing by fixation in stable solid media in an inorganic matrix, e.g. clays, zeolites
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/28—Treating solids
- G21F9/34—Disposal of solid waste
Definitions
- the present invention relates to a method for adjusting the water content ratio of powder materials and the like, and is particularly effective for adjusting the water content ratio of bentonite used for radioactive waste geological disposal.
- high-level radioactive waste is liquid waste separated in the reprocessing process of spent nuclear fuel, and not only has a high level of radioactivity but also has a radioactivity for a long period of time. It contains many long-lived radionuclides. Therefore, such high-level radioactive waste is dissolved in stainless steel caester together with glass raw material, stabilized as a glass solidified body, stored for several decades for cooling, and then stored in the glass solidified body.
- the caster is disposed of in a closed container made of thick-walled steel plate called “overpack” to make it a waste body, and this waste body is 3 OOm underground (determined by law). It is designed to be buried in the geological formation.
- Bentonite is a generic name for a group of resource minerals whose main component is clay montmorillonite and quartz, calcite, plagioclase and other coexisting minerals, and montmorillonite is a thin plate-like crystal (length approx. 0.2 ⁇ m). ⁇ ), which absorbs water between crystals and swells.When pressure is applied by compaction, etc., the layers overlap each other, resulting in poor water permeability, and water molecules are ionized in the electric double layer. The interstitial water cannot move because it is attracted and the gap between the layers is reduced by pressure. For the above reasons, Bentonite is used as a water shielding material. In geological disposal of radioactive waste, bentonite is used because of its water shielding performance against groundwater, buffer performance against rock pressure, and radionuclide delay performance.
- bentonite-type population barriers are planned to be built by compacting or statically compressing bentonites adjusted to a specified moisture content with heavy machinery. is there. It is vaguely assumed that the moisture content is adjusted by adding water in advance and mixing with sufficient stirring or by watering.
- Patent Documents 1 to 6 as prior art documents related to the present invention.
- the inventions of Patent Documents 1 and 2 relate to a method for producing bentonite.
- the inventions of Patent Documents 3 to 6 relate to a method for producing concrete in which concrete is kneaded using small ice blocks instead of water.
- Patent Document 1 Japanese Patent Laid-Open No. 8-27 7 1 08
- Patent Document 2 Japanese Patent Laid-Open No. 6-29 35 1 2
- Patent Document 3 Japanese Patent Application Laid-Open No. 200 2-144 3 2 5
- Patent Document 4 Japanese Patent Application Laid-Open No. 2002-1711
- Patent Document 5 Japanese Patent Application Laid-Open No. 200 1-293 718
- Patent Document 6 Japanese Patent Application Laid-Open No. Hei 6-1 7 9 20 9 It is vaguely assumed that the water content ratio of bentonite is adjusted by adding water in advance and stirring thoroughly or by watering. However, if the powder bentonite is simply hydrated or sprinkled, only the bentonite that comes into contact with the water will form a high water content aggregate and become extremely uneven. In addition, in order to stir and mix the bentonite containing water until it becomes homogeneous, a powerful mixer is required, and during that time, a mixer is used to remove the bentonite sticking to the stirrer blade and stirrer. Sir must be stopped. For this reason, it is not practical to adjust the water content of the enormous amount of bentonite necessary to construct a bentonite artificial barrier. In addition, continuous stirring and mixing was impossible.
- the bentonite after adjusting the water content ratio is Therefore, the bentonite is swollen as it is flooded when the bentonite whose moisture content has been adjusted by the conventional method is compacted and used as a water-stopping material. Until the gap was closed, water-stopping performance could not be expected. Also, bentonite with adjusted water content has a non-uniform water content distribution in the conventional method, and when dried, the shrinkage of the high water content part was remarkable and many large cracks were generated.
- a liquid such as water when a water content ratio is adjusted by adding a liquid such as water to a raw material such as a bentonite or the like, a liquid such as water is uniformly applied to the raw material such as a powder material with a relatively simple facility.
- the water content of the material can be mixed easily, the water content ratio of a large amount of raw materials can be easily adjusted, and the material having good water shielding performance can be obtained by adjusting the water content ratio evenly.
- the purpose is to provide a ratio adjustment method. Disclosure of the invention
- the invention according to claim 1 of the present invention is a method for adjusting the water content ratio by adding a liquid (ice or other solution) to a raw material such as a powder material or a granular material, and stirring the low-temperature raw material and fine particle ice.
- a liquid ice or other solution
- This is a method for adjusting the moisture content of a material, characterized in that a material having a predetermined moisture content is obtained by mixing and returning a raw material in which fine particle ice is uniformly mixed to room temperature.
- granular ice is added to a powder material adjusted to a low temperature, and the water content ratio is adjusted by stirring and mixing the powders. As the granular ice becomes finer, the water content of the powder after mixing becomes uniform. While stirring and mixing is performed using a stirring tank kept at a low temperature with a low-temperature gas or the like, the cost can be reduced by using snow and cold when it is performed in a cold region. Furthermore, it is also possible to stir and mix powder materials and fine particles ice while feeding them by feeding them into a tube through which a low-temperature gas flows.
- the invention according to claim 2 of the present invention is the method for adjusting the water content ratio according to claim 1, wherein the stirring tank is used, the liquid is sucked with a low-temperature / high-pressure gas (nitrogen gas, etc.) and sprayed into the stirring tank.
- a low-temperature / high-pressure gas nitrogen gas, etc.
- the fine particle ice is put into the stirring tank, and the low temperature raw material and the fine particle ice are stirred and mixed in the stirring tank kept at a low temperature.
- This is a method for adjusting the water content ratio of the material.
- This is a batch-type water content adjustment using a stirring tank, and it is put into a low-temperature stirring tank while producing fine particle ice.
- a liquid sprayer is used to suck water or other liquid from a container with low-temperature / high-pressure nitrogen gas supplied from a liquid nitrogen cylinder, spray it into a stirring tank while cooling, and supply fine ice in the stirring tank To do.
- the invention according to claim 3 of the present invention is the water content ratio adjusting method according to claim 1, wherein a stirring vessel is used, pre-prepared fine particle ice is put into the stirring vessel, and the stirring is maintained at a low temperature.
- a method for adjusting the water content ratio of a material characterized by stirring and mixing low temperature raw materials and fine particle water in a tank.
- a powder material or the like stored at a low temperature is stored in a stirring tank kept at a low temperature by a low-temperature nitrogen gas supplied from a liquid nitrogen cylinder, and fine particle water is charged therein. Even in this case, the powder material and the fine particle ice can be uniformly stirred and mixed only by adding a simple device to an ordinary powder mixer.
- the invention according to claim 4 of the present invention is the method for adjusting the water content ratio according to claim 1, wherein the feed pipe is used, and the low-temperature raw material and the fine particle ice introduced into the feed pipe are mixed with a low-temperature and high-pressure gas.
- This is a method for adjusting the water content ratio of a material, characterized by stirring and mixing in a pressure feeding tube kept at a low temperature while being pressure fed.
- a powder material that has been stored at a low temperature and fine particle ice are placed in a pressure feed tube that is kept at a low temperature with a low-temperature nitrogen gas supplied from a liquid nitrogen cylinder, and stirred and mixed while being pumped by a stream of low-temperature gas To do.
- the water content ratio can be adjusted continuously by mixing and stirring the powder material and the fine particle ice uniformly with a relatively simple device.
- the present invention is particularly effective for adjusting the water content ratio of a powder bentonite, and is a powder vent 'uses fine particle ice as a powder similar to a nitrate'.
- a low temperature stirring tank In a low-temperature environment such as a pressure feed tube, the powder bentonite and the fine particle ice are both fine particles and both behave as powder # :, so that they can be stirred and mixed uniformly without being absorbed by the bentonite. If the mixture is uniformly mixed and then returned to room temperature, a bentonite with a uniform moisture content can be obtained.
- powder material such as powder bentonite and fine particle ice are stirred and mixed in a stirring vessel kept at a low temperature and a pressure feed tube
- the powder material and fine particle ice are both fine particles. Yes, both of them behave as powders and are not mixed with the powder material, but can be mixed uniformly and the water content can be adjusted uniformly.
- bentonite-type artificial paria with good shielding performance can be obtained by bentonite with uniform water content.
- the adjustment of the water content ratio is simply a mixing operation between powders, a powerful mixer is unnecessary, and a normal powder mixer can be used, thereby reducing the cost.
- the powder after adjustment of the water content is in the form of aggregates (large particle size) in the conventional method, so the state immediately after compaction is in the form of “ripe”, but in the present invention, there is almost no change in the particle size distribution. With the same compaction energy, the dry density is high, and the state after compaction is uniform and precise. As a result, when a powder material or the like is compacted and used as a water-stopping material, the initial water permeability is low and high water-stopping property can be expected even immediately after flooding.
- the bentonite adjusted with the water content according to the present invention has a constant water content distribution and has few cracks even when dried.
- the moisture content distribution is non-uniform, so when dried, the shrinkage of the portion with a high moisture content was remarkable and many large cracks were generated.
- FIG. 1 is a cross-sectional view showing a first embodiment of a moisture content adjusting machine for carrying out the moisture content adjusting method of the present invention.
- FIG. 2 is a cross-sectional view showing a second embodiment of the moisture content adjusting machine for carrying out the moisture content adjusting method of the present invention.
- FIG. 3 is a cross-sectional view showing a third embodiment of a moisture content adjusting machine for carrying out the moisture content adjusting method of the present invention.
- Fig. 4 is a graph showing a comparison of torque between the present invention and the conventional method according to the vane shear test.
- FIG. 1 shows a first embodiment of a moisture content adjusting machine for carrying out the moisture content adjusting method of the present invention.
- FIG. 2 shows a second embodiment.
- FIG. 3 shows a third embodiment.
- the first embodiment shown in FIG. 1 is a patch-type water content ratio adjuster, which uses a stirring tank 1 kept at a low temperature, and in this stirring tank 1, powder bentnite A and fine particle ice B The powder bentonite A in which the fine particle ice B is uniformly mixed is returned to room temperature to obtain a bentonite having a predetermined water content ratio.
- the stirring tank 1 can be an ordinary powder mixer equipped with a stirring blade 3 that is rotationally driven by a motor 2, and a heat insulating material or a cooling jacket 4 is provided on the outer periphery of the lower part of the tank.
- stirring tank 1 be a low-temperature tank. In this low temperature stirring tank 1, powder bentonite A stored at low temperature is charged.
- the fine particle ice B is supplied into the agitation tank 1 using, for example, a liquid sprayer 10.
- An inlet 11 is provided at the top of a normal powder mixer, a liquid nitrogen cylinder 1 2 is connected to the inlet 11, and a supply pipe 13 is connected to the inlet 11.
- Suction tube 1 5 Connect the upper part of 5. Liquid such as water in the liquid container 14 is sucked at a negative pressure by the low-temperature and high-pressure nitrogen gas supplied from the liquid nitrogen cylinder 1 2 and sprayed into the stirring tank 1 while being cooled by the nitrogen gas.
- Fine ice ice B is supplied into the stirring tank 1.
- a high pressure relief valve 5 for releasing excessive pressure is connected to the upper part of the stirring tank 1.
- the powder bentonite A and the fine particle ice B are stirred and mixed by the stirring blade 3.
- the powder bentonite A and the fine particle ice B are both fine particles, and both behave as a powder, so that liquids such as water are uniformly mixed without being absorbed by the bentonite. If the mixture is uniformly mixed and then returned to room temperature, a bentonite with a uniform moisture content can be obtained. In geological disposal of radioactive waste, bentonite-type artificial barriers with good water shielding performance can be obtained with bentonite with a uniform water content.
- the liquid added to the bentonite is not limited to water, and various solutions may be used.
- the powders are mixed with each other, so that a powerful agitator is not required and a normal powder mixer can be used.
- the material since the material does not stick to the stirring blades or tank, it can be applied to adjust the water content ratio of a large amount of material. You can easily handle the work.
- the powder bentonite after adjusting the water content ratio has almost no change in the particle size distribution, and compared with the conventional method, the same compaction energy results in a higher dry density and tightening.
- the state immediately after hardening becomes uniform and dense.
- the powder bentonite is compacted and used as a water-stopping material, the initial water permeability is low and high water-stopping can be expected even immediately after flooding.
- the moisture content distribution was non-uniform, and when dried, the shrinkage of the high moisture content portion was remarkable and large cracks were generated, but the bentonite adjusted with the moisture content according to the present invention has a moisture content distribution. Is constant and has few cracks even after drying.
- the second embodiment shown in FIG. 2 is a batch type water content ratio adjuster, and is provided with a fine particle ice inlet 2.0 in the upper part of the stirring tank 1 similar to FIG. 1, and the fine water B prepared in advance is stirred. I am trying to put it in 1.
- a liquid nitrogen cylinder 21 is connected to the upper part of the agitation tank 1, and the inside of the agitation tank 1 is kept at a low temperature by nitrogen gas supplied from the cylinder 21.
- the powder bentonite A and the fine particle ice B which are stored at low temperature, are stirred and mixed by the stirring blade 3.
- the same functions and effects as those of the first embodiment shown in FIG. 1 can be obtained.
- Fig. 4 shows the torque of the mixer required for stirring and mixing by the method shown in Fig. 2 using a vane breaking tester. In the present invention, stirring and mixing can be performed with low torque regardless of the water content.
- the third embodiment shown in FIG. 3 is a continuous water content ratio adjuster.
- Powder bentonite A and fine particle ice B stored at a low temperature in a pressure feed pipe 30 kept at a low temperature without using a stirring tank.
- the powder bentonite A in which the fine particle ice B is uniformly mixed is continuously obtained.
- a liquid nitrogen cylinder 31 is connected to the pressure feeding pipe 30, and the inside of the pressure feeding pipe 30 is kept at a low temperature by the low-temperature nitrogen gas supplied from the cylinder 31.
- a bent air inlet 3 2 and a compressed air supply port 3 '4 are provided upstream of the fine particle ice inlet 3 3 so The powder bentonite A and the fine particles B are stirred and mixed while being pumped.
- a normal temperature storage tank 35 is provided at the tip of the pressure feeding tube 30, and the bentonite A in which the fine particle ice B is uniformly mixed in the pressure feeding tube 30 is returned to room temperature, and the water content ratio is adjusted uniformly. Can be obtained.
- Powdered bentonite A which was stored at a low temperature, was charged with fine particle ice B, which had the same weight, into a pressure-feed tube having a diameter of about 10 cm.
- the bentonite after pumping had a moisture content of 100%, and it was found that even a bentonite with a high moisture content, which was impossible in the past, can be pumped and mixed. Furthermore, it was found that continuous moisture content adjustment is possible.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- High Energy & Nuclear Physics (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Accessories For Mixers (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/909,499 US8066422B2 (en) | 2005-03-29 | 2006-03-27 | Material moisture content adjustment method |
| EP06730930A EP1864710B1 (en) | 2005-03-29 | 2006-03-27 | Method of regulating water content of bentonite |
| JP2007510577A JP4872910B2 (ja) | 2005-03-29 | 2006-03-27 | ベントナイトの含水比調整方法 |
| CA2602489A CA2602489C (en) | 2005-03-29 | 2006-03-27 | Material moisture content adjustment method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-093678 | 2005-03-29 | ||
| JP2005093678 | 2005-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006104227A1 true WO2006104227A1 (ja) | 2006-10-05 |
Family
ID=37053481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/306982 Ceased WO2006104227A1 (ja) | 2005-03-29 | 2006-03-27 | 材料の含水比調整方法 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8066422B2 (ja) |
| EP (1) | EP1864710B1 (ja) |
| JP (1) | JP4872910B2 (ja) |
| CA (1) | CA2602489C (ja) |
| WO (1) | WO2006104227A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101476262B1 (ko) * | 2013-06-21 | 2014-12-24 | 한국수력원자력 주식회사 | 방사성 액체 폐기물 저장용 밀폐 용기 |
| JP2022126233A (ja) * | 2021-02-18 | 2022-08-30 | 鹿島建設株式会社 | 掘削孔の埋め戻し方法および掘削孔の埋め戻し装置 |
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| FR3042986B1 (fr) * | 2015-11-04 | 2017-12-15 | Commissariat Energie Atomique | Dispositif de melange de poudres par fluide cryogenique et generation de vibrations |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101476262B1 (ko) * | 2013-06-21 | 2014-12-24 | 한국수력원자력 주식회사 | 방사성 액체 폐기물 저장용 밀폐 용기 |
| JP2022126233A (ja) * | 2021-02-18 | 2022-08-30 | 鹿島建設株式会社 | 掘削孔の埋め戻し方法および掘削孔の埋め戻し装置 |
| JP7497312B2 (ja) | 2021-02-18 | 2024-06-10 | 鹿島建設株式会社 | 掘削孔の埋め戻し方法および掘削孔の埋め戻し装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US8066422B2 (en) | 2011-11-29 |
| US20090016149A1 (en) | 2009-01-15 |
| CA2602489C (en) | 2013-05-14 |
| EP1864710A1 (en) | 2007-12-12 |
| CA2602489A1 (en) | 2006-10-05 |
| EP1864710B1 (en) | 2012-08-01 |
| JPWO2006104227A1 (ja) | 2008-09-11 |
| EP1864710A4 (en) | 2010-09-15 |
| JP4872910B2 (ja) | 2012-02-08 |
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