CN109920574B - Low-temperature curing method of silver-coated silica gel - Google Patents
Low-temperature curing method of silver-coated silica gel Download PDFInfo
- Publication number
- CN109920574B CN109920574B CN201910233651.8A CN201910233651A CN109920574B CN 109920574 B CN109920574 B CN 109920574B CN 201910233651 A CN201910233651 A CN 201910233651A CN 109920574 B CN109920574 B CN 109920574B
- Authority
- CN
- China
- Prior art keywords
- silica gel
- silver
- mixture
- coated silica
- movable plate
- 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.)
- Active
Links
Images
Abstract
The application discloses a low-temperature curing method of silver-coated silica gel, which comprises the following steps: mixing silver-coated silica gel particles containing radioactive iodine with borate raw material powder, adding deionized water, and grinding to obtain a wet mixture, wherein the borate raw material powder consists of boron oxide, bismuth oxide and zinc oxide; drying the wet mixture to obtain a dried mixture; and putting the dried mixture into a sintering device for sintering, and cooling after sintering to obtain the glass ceramic sintered body. The glass ceramic sintered body obtained by the method has the advantages of high volume density, low nuclide leaching rate and the like, and can well inhibit the migration of radioactive iodine in nature. In addition, according to the low-temperature curing method, the silver-coated silica gel particles containing radioactive iodine are directly mixed with borate raw material powder, high-temperature sintering operation is not needed, and the method has the characteristics of simple process, energy conservation, environmental protection, safety, reliability and the like, and has a good industrial application prospect.
Description
Technical Field
The invention relates to the field of radioactive waste treatment, in particular to a low-temperature curing method of silver-coated silica gel.
Background
Nuclear technology is gaining favor as a clean, efficient source of energy, but the development of nuclear energy is accompanied by the production of large quantities of radionuclides that produce heavy ions and radiation of various types during decay, or are enriched by the food chain, all of which can cause serious damage to the organism and threaten its survival. Of these, iodine-129 is urgently needed for disposal due to its long half-life. At present, the radioactive iodine treatment method mainly comprises a marine treatment method, cement, plastic, asphalt solidification and the like. These methods can treat radioactive iodine to some extent, but have problems such as poor stability of the cured product and secondary pollution; and does not meet the need for long-term disposal of radioactive iodine.
The radioactive iodine is solidified by the silver-coated silica gel, so that the migration of the pollution nuclide in the biosphere can be effectively inhibited. The silver-coated silica gel is prepared by placing silica gel particles in AgNO3The particles obtained in solution. The curing treatment of silver-coated silica gel generally adopts a gas trapping method, and the method can realize the adsorption of radioactive iodine. The method can directly form AgI so as to cure the radioactive iodine, but the silica gel particles are easily influenced by external environmental factors such as pressure, temperature, humidity and the like, so that the stability of a cured body is influenced by the deformation of the cured body, and the requirement of long-term treatment of the radioactive iodine cannot be met.
Disclosure of Invention
Aiming at the problems, the invention provides a low-temperature curing method of silver-coated silica gel.
The technical scheme adopted by the invention is as follows:
a low-temperature curing method of silver-coated silica gel comprises the following steps:
mixing silver-coated silica gel particles containing radioactive iodine with borate raw material powder, adding deionized water, and grinding to obtain a wet mixture, wherein the borate raw material powder consists of boron oxide, bismuth oxide and zinc oxide;
drying the wet mixture to obtain a dried mixture;
and putting the dried mixture into a sintering device for sintering, and cooling after sintering to obtain the glass ceramic sintered body.
The glass ceramic sintered body obtained by the application contains the silver-coated silica gel of radioactive iodine, has the advantages of higher volume density, lower nuclide leaching rate and the like, and can well inhibit the migration of the radioactive iodine in the nature. In addition, according to the low-temperature curing method, the silver-coated silica gel particles containing radioactive iodine are directly mixed with borate raw material powder, high-temperature sintering operation is not needed, and the method has the characteristics of simple process, energy conservation, environmental protection, safety, reliability and the like, and has a good industrial application prospect.
In one embodiment of the present invention, the maximum outer diameter of the silver-coated silica gel particles containing radioactive iodine is not more than 200 μm.
The larger outer diameter of the particles is not beneficial to grinding operation, and reliable mixing and grinding of the silver-coated silica gel particles containing radioactive iodine and borate glass ceramic powder can be ensured by limiting the outer diameter of the silver-coated silica gel particles containing radioactive iodine. In practical use, the silver-coated silica gel particles containing radioactive iodine with the maximum outer diameter of 200 μm or less can be obtained by a device such as a filter screen.
In an embodiment of the present invention, in the dried mixture, by mass, the radioactive iodine-containing silver-coated silica gel particles are 40% to 70% and the borate glass ceramic powder is 30% to 60%.
In one embodiment of the invention, the mass of radioactive iodine in the dried mixture is no more than 15% of the total mass of the mixture.
In one embodiment of the invention, the borate raw material powder comprises, by mass, 40% -70% of boron oxide, 22% -48% of bismuth oxide and 8% -12% of zinc oxide.
Boron is used as a fluxing agent to well reduce the melting point, the sintering temperature in the sintering process can be effectively reduced by limiting the mass percent of boron oxide to be 40-70%, and low-temperature sintering can be realized, so that the low-temperature sintering is safe, reliable, energy-saving and environment-friendly.
In one embodiment of the present invention, the drying process of the wet mixture is specifically as follows: and (3) ventilating and drying for 0.5-5 h at the temperature of between the normal temperature and 100 ℃.
In one embodiment of the present invention, the sintering temperature of the dried mixture is 400 ℃ to 800 ℃, and the sintering time is 1h to 3 h.
In an embodiment of the present invention, the method is implemented by a curing apparatus, where the curing apparatus includes:
a silver-coated silica gel particle filtering mechanism;
the colloid mill is used for mixing and grinding the silver-coated silica gel particles and the borate raw material powder;
drying means for receiving the moist mixture from the colloid mill and drying the mixture to obtain a dried mixture;
and the second sintering device is used for sintering the dried mixture.
The second sintering device can be a high-temperature muffle furnace or a microwave sintering furnace or the like.
In one embodiment of the present invention, the silver-coated silica gel particle filtering mechanism includes:
a weighing meter;
the first hopper is arranged right above the weighing meter;
a filter screen installed in the first hopper;
the first vibrating motor is arranged on the first hopper or the filter screen; and
the collecting box is placed on the weighing meter and is positioned right below the first hopper;
the drying device includes:
the water passing net is positioned right below the discharge port of the colloid mill and used for filtering water, and two vertical plates which are arranged oppositely are arranged on the water passing net;
the movable plate is arranged between the two vertical plates, two ends of the lower side of the movable plate are respectively in rotating fit with the vertical plates, the movable plate is provided with a first working position and a second working position, the movable plate is vertically arranged in the first working position, and the movable plate is horizontally opened outwards in the second working position;
the reset torsion spring is matched with the movable plate and is used for keeping the movable plate at the first working position;
the lower end of the push plate is abutted to the water passing net, the push plate and the movable plate are respectively positioned on two sides of the water passing net, and the two vertical plates, the movable plate and the push plate form a limiting space which is used for receiving a wet mixture from a discharge port of the colloid mill;
one end of the blowing pipe is arranged on the side wall of the vertical plate and used for blowing air to one side of the water passing net, and the other end of the blowing pipe is connected with the heating fan;
the second vibration motor is fixed at the lower part of the water passing net; and
and the piston rod of the pushing cylinder is fixed with the push plate and used for driving the push plate to move towards one end of the movable plate, and the movable plate is opened to discharge the dried mixture.
The working principle of the silver-coated silica gel particle filtering mechanism is as follows: the iodine-containing silver-coated silica gel particles are poured into the first hopper, the first vibrating motor works to enable the iodine-containing silver-coated silica gel particles meeting the requirements to fall into the collecting box after passing through the filter screen, and the weighing meter can call the mass of the iodine-containing silver-coated silica gel particles falling into the collecting box.
The working principle of the drying device is as follows: the mixture that the colloid mill discharge gate came out is moist, can filter more water through crossing the water net, through two vertical boards, fly leaf and push pedal form spacing space and receive moist mixture, the blowing pipe of being connected with heating fan can carry out the hot air drying operation, can improve drying efficiency through setting up second vibrating motor, fly leaf downside both ends respectively with vertical board normal running fit, the propelling movement cylinder can drive the push pedal and remove to fly leaf one end, overcome the elastic force of torsional spring that resets, thereby open the mixture discharge after the fly leaf will dry.
Preferably, a cover plate is rotatably mounted on an upper end of one of the vertical plates, the cover plate is used for covering the limiting space, and the drying device further comprises a driving element, such as a motor, for driving the cover plate to rotate.
By means of the cooperation of the drive element and the cover plate, the drive element can be covered during operation of the blower pipe, preventing the mixture from splashing to the outside.
The pressing forming device is used for pressing the mixture obtained by the drying device into a blocky structure; the press forming device includes:
the hollow seat is arranged on one side of the movable plate and used for receiving the mixture dried by the drying device;
the supporting plate is arranged inside the hollow seat in a sliding sealing mode and is positioned below the hollow seat;
the second lifting mechanism is arranged below the supporting plate and used for driving the supporting plate to move up and down;
the pressing plate is positioned right above the hollow seat;
and the third lifting mechanism is arranged above the pressing plate and used for driving the pressing plate to move towards the inside of the hollow seat and extruding the dried mixture.
The working principle of the pressing forming device is as follows: the hollow seat inner space is used for receiving dry mixture, and after the receipt was accomplished, third elevating system work made and pressed the pressing plate down, carried out pre-compaction shaping operation, and after the completion of pressing, third elevating system reset, and second elevating system work, backup pad rebound, the mixture that is compressed into the massive structure can shift out from the hollow seat to can take out, carry out sintering operation in the second sintering device.
Preferably, the second lifting mechanism and the third lifting mechanism are hydraulic oil cylinders.
Preferably, the left side and the right side of the movable plate are provided with limiting parts extending towards one side of the push plate, the movable plate is of a U-shaped structure, the limiting parts are embedded into the inner side wall of the vertical plate, and when the push plate moves towards the hollow seat, the push plate can slide between the two limiting parts. The movable plate is of a U-shaped structure, and when the push plate pushes the dried mixture to the hollow seat, the mixture can be reliably limited.
The invention has the beneficial effects that: the glass ceramic sintered body obtained by the application contains the silver-coated silica gel of radioactive iodine, has the advantages of higher volume density, lower nuclide leaching rate and the like, and can well inhibit the migration of the radioactive iodine in the nature. In addition, according to the low-temperature curing method, the silver-coated silica gel particles containing radioactive iodine are directly mixed with borate raw material powder, high-temperature sintering operation is not needed, and the method has the characteristics of simple process, energy conservation, environmental protection, safety, reliability and the like, and has a good industrial application prospect.
Description of the drawings:
FIG. 1 is a schematic view of a curing apparatus;
FIG. 2 is a schematic view of a silver-coated silica gel particle filtration mechanism;
FIG. 3 is a schematic view of a colloid mill, a drying device, and a press molding device.
The figures are numbered:
3. a silver-coated silica gel particle filtering mechanism; 4. colloid milling; 5. a drying device; 6. a second sintering device; 7. a press forming device; 8. a weighing meter; 9. a collection box; 10. a first hopper; 11. a filter screen; 12. a first vibration motor; 23. a discharge port; 24. a water passing net; 25. a vertical plate; 26. a movable plate; 27. a limiting part; 28. pushing the plate; 29. a limiting space; 30. a cover plate; 31. a push cylinder; 32. a second vibration motor; 33. a blowpipe; 34. a heating fan; 35. a hollow seat; 36. a second lifting mechanism; 37. a pressing plate; 38. and a third lifting mechanism.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings.
The following experimental methods are all conventional methods unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
In the following examples, the high temperature muffle furnace used was a KSS-1700 type high temperature muffle furnace; the microwave sintering furnace is a HAMiLab-M1500 type microwave high-temperature muffle furnace.
The silica gel particles used were purchased from Xinchu, Inc. of Qingdao, Shandong.
AgI, boron oxide (B) used2O3) Bismuth oxide (Bi)2O3) And zinc oxide (ZnO) was purchased from shanghai alatin biochemical technologies, inc.
Example 1
In this example, the radionuclide iodine-129 was simulated with the common iodine-127. A low-temperature curing method of silver-coated silica gel comprises the following steps:
(1) mixing and grinding the silica gel particles and AgI to obtain iodine-containing silver-coated silica gel particles, and filtering the iodine-containing silver-coated silica gel particles through a filter screen to obtain the iodine-containing silver-coated silica gel particles with the maximum outer diameter of less than or equal to 200 mu m;
(2) mixing iodine-containing silver-coated silica gel particles with borate raw material powder (boron oxide, bismuth oxide and zinc oxide), adding deionized water, grinding to obtain a wet mixture, and drying the wet mixture to obtain a dry mixture; in the borate raw material powder, the mass percentage of boron oxide is 60%, bismuth oxide is 28%, and zinc oxide is 12%. In actual application, 40-70% of boron oxide, 22-48% of bismuth oxide and 8-12% of zinc oxide; in the dried mixture, by mass fraction, 50.68% of silver coated silica gel, 9.32% of iodine element and 40.00% of borate glass ceramic powder are coated. In actual application, in order to have a better curing effect, the mass fraction of the silver-coated silica gel particles containing iodine is 40-70%, the mass fraction of the borate glass ceramic powder is 30-60%, and the mass fraction of radioactive iodine is not more than 15% of the total mass of the mixture.
(3) And (3) putting the dried mixture into a high-temperature muffle furnace, heating the mixture to 500 ℃ from room temperature, preserving the heat at 500 ℃ for 3 hours, and naturally cooling the mixture to room temperature to obtain the borate glass ceramic sintered body containing the iodine coated silver silica gel. In practical application, cooling after sintering can be carried out in a cooling mode with different rates, the sintering temperature can be controlled to be 400-800 ℃, namely low-temperature sintering of the application is realized, and the sintering time can be 1-3 h.
After a sample is taken out, the test is carried out, and the volume density of the prepared borate glass ceramic sintered body containing the silver-coated silica gel containing the iodine is 2.684g/cm3The normalized leaching rate of the radionuclide I under the PCT standard is lower than 3.96 multiplied by 10 days after 42 days-4g·m-2·d-1。
In this embodiment, the specific manner of drying the wet mixture is as follows: and (3) ventilating and drying for 0.5-5 h at the temperature of between the normal temperature and 100 ℃.
The glass ceramic sintered body obtained by the application contains the silver-coated silica gel of radioactive iodine, has the advantages of higher volume density, lower nuclide leaching rate and the like, and can well inhibit the migration of the radioactive iodine in the nature. In addition, according to the low-temperature curing method, the silver-coated silica gel particles containing radioactive iodine are directly mixed with borate raw material powder, high-temperature sintering operation is not needed, and the method has the characteristics of simple process, energy conservation, environmental protection, safety, reliability and the like, and has a good industrial application prospect.
Example 2
In this example, the radionuclide iodine-129 was simulated with the common iodine-127. A low-temperature curing method of silver-coated silica gel comprises the following steps:
(1) mixing and grinding the silica gel particles and AgI to obtain iodine-containing silver-coated silica gel particles, and filtering the iodine-containing silver-coated silica gel particles through a filter screen to obtain the iodine-containing silver-coated silica gel particles with the maximum outer diameter of less than or equal to 200 mu m;
(2) mixing iodine-containing silver-coated silica gel particles with borate raw material powder (boron oxide, bismuth oxide and zinc oxide), adding deionized water, grinding to obtain a wet mixture, and drying the wet mixture to obtain a dry mixture; in the borate raw material powder, the mass percentage of boron oxide is 50%, bismuth oxide is 40%, and zinc oxide is 10%. In the dried mixture, by mass fraction, 65.65% of silver coated silica gel, 14.35% of iodine element and 45.00% of borate glass ceramic powder are coated.
(3) And (3) putting the dried mixture into a microwave sintering furnace, heating the mixture to 700 ℃ from room temperature, preserving the heat at 700 ℃ for 1h, and naturally cooling the mixture to room temperature to obtain the borate glass ceramic sintered body containing the iodine coated silver silica gel. In practical application, cooling after sintering can be carried out in a cooling mode with different rates, the sintering temperature can be controlled to be 400-800 ℃, namely low-temperature sintering of the application is realized, and the sintering time can be 1-3 h.
After a sample is taken out, the test is carried out, and the volume density of the prepared borate glass ceramic sintered body containing the silver-coated silica gel containing the iodine is 2.884g/cm3The normalized leaching rate of the radionuclide I under the PCT standard is lower than 4.02 multiplied by 10 after 42 days-4g·m-2·d-1。
Example 3
As shown in fig. 1, the present embodiment discloses a curing apparatus for implementing the method of the present application, the curing apparatus comprising:
a silver-coated silica gel particle filtering mechanism 3;
a colloid mill 4 for mixing and grinding the silver-coated silica gel particles and the borate raw material powder;
a drying device 5 for receiving the wet mixture from the colloid mill 4 and drying the mixture to obtain a dried mixture;
and a second sintering device 6 for performing a sintering operation on the dried mixture.
The second sintering device 6 may be a high-temperature muffle furnace, a microwave sintering furnace, or the like.
As shown in fig. 2, the silver-coated silica gel particle filter mechanism 3 includes:
a weight scale 8;
a first hopper 10 disposed right above the weight scale 8;
a filter screen 11 installed in the first hopper 10;
a first vibration motor 12 installed on the first hopper 10 or the filter screen 11; and
the collecting box 9 is placed on the weighing meter 8 and is positioned right below the first hopper 10;
as shown in fig. 3, the drying device 5 includes:
the water passing net 24 is positioned right below the discharge port 23 of the colloid mill 4 and used for filtering water, and two vertical plates 25 which are oppositely arranged are arranged on the water passing net 24;
the movable plate 26 is arranged between the two vertical plates 25, two ends of the lower side of the movable plate 26 are respectively in rotating fit with the vertical plates 25, the movable plate 26 is provided with a first working position and a second working position, the movable plate 26 is vertically arranged in the first working position, and the movable plate 26 is horizontally opened outwards in the second working position;
a return torsion spring (not shown in the drawings) cooperating with the movable plate 26 for keeping the movable plate 26 in the first working position;
the push plate 28 is vertically arranged, the lower end of the push plate 28 is abutted to the water passing net 24, the push plate 28 and the movable plate 26 are respectively positioned at two sides of the water passing net 24, the two vertical plates 25, the movable plate 26 and the push plate 28 form a limiting space 29, and the limiting space 29 is used for receiving the wet mixture from the discharge port 23 of the colloid mill 4;
one end of the blowing pipe 33 is arranged on the side wall of the vertical plate 25 and is used for blowing air to one side of the water passing net 24, and the other end of the blowing pipe is connected with the heating fan 34;
a second vibration motor 32 fixed to the lower part of the water passing net 24; and
and the pushing cylinder 31 is fixed with the piston rod and the push plate 28 and is used for driving the push plate 28 to move towards one end of the movable plate 26 and opening the movable plate 26 to discharge the dried mixture.
The working principle of the silver-coated silica gel particle filtering mechanism 3 is as follows: the iodine-containing silver-coated silica gel particles are poured into the first hopper 10, the first vibration motor 12 works to enable the iodine-containing silver-coated silica gel particles meeting the requirement to fall into the collection box 9 after passing through the filter screen 11, and the weighing meter 8 can call the mass of the iodine-containing silver-coated silica gel particles falling into the collection box 9.
The working principle of the drying device 5 is as follows: the mixture that colloid mill 4 discharge gate 23 came out is moist, can filter more water through crossing water net 24, through two vertical boards 25, fly leaf 26 and push pedal 28 form spacing space 29 and receive moist mixture, the blowing pipe 33 of being connected with heating blower 34 can carry out the hot air drying operation, can improve drying efficiency through setting up second vibrating motor 32, fly leaf 26 downside both ends respectively with vertical board 25 normal running fit, propelling movement cylinder 31 can drive push pedal 28 and remove to fly leaf 26 one end, overcome the elastic force of reset torsion spring, thereby open the mixture discharge after fly leaf 26 will dry.
As shown in fig. 3, it is preferable that a cover plate 30 is rotatably installed at an upper end of one of the vertical plates 25, the cover plate 30 is used for covering the limiting space 29, and the drying device 5 further includes a driving member (not shown) such as a motor for driving the cover plate 30 to rotate. By means of the cooperation of the driving element and the cover plate 30, the driving element can be covered when the blowing pipe 33 is in operation, preventing the mixture from splashing to the outside.
As shown in fig. 3, the drying device further comprises a press forming device 7, wherein the press forming device 7 is used for pressing the mixture obtained by the drying device 5 into a block structure; the press molding device 7 includes:
a hollow seat 35 disposed at one side of the movable plate 26 for receiving the dried mixture from the drying device 5;
a support plate (not shown) disposed inside the hollow seat 35 and located below the hollow seat 35 in a sliding and sealing manner;
the second lifting mechanism 36 is arranged below the supporting plate and used for driving the supporting plate to move up and down;
a pressing plate 37 located directly above the hollow seat 35;
and a third elevating mechanism 38 disposed above the pressing plate 37 for driving the pressing plate 37 to move into the hollow holder 35 and pressing the dried mixture.
The working principle of the press forming device 7 is as follows: the inner space of the hollow seat 35 is used for receiving dry mixture, after the receiving is completed, the third lifting mechanism 38 works to press the pressing plate 37 to be pressed down, the pre-pressing forming operation is carried out, after the pressing is completed, the third lifting mechanism 38 resets, the second lifting mechanism 36 works, the supporting plate moves upwards, the mixture compressed into a block structure can be moved out of the hollow seat 35, and therefore the mixture can be taken out and sintered in the second sintering device 6.
Preferably, the second lifting mechanism 36 and the third lifting mechanism 38 are hydraulic cylinders.
As shown in fig. 3, it is preferable that the movable plate 26 has a stopper 27 extending toward the push plate 28 on both left and right sides thereof, the movable plate 26 has a U-shaped structure, the stopper 27 is fitted into an inner sidewall of the vertical plate 25, and the push plate 28 slides between the stoppers 27 when the push plate 28 moves toward the hollow seat 35. The movable plate 26 is of a U-shaped configuration to reliably confine the mixture as the push plate 28 pushes the dried mixture to the hollow seat 35.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (7)
1. A low-temperature curing method of silver-coated silica gel is characterized by comprising the following steps:
mixing silver-coated silica gel particles containing radioactive iodine with borate raw material powder, adding deionized water, and grinding to obtain a wet mixture, wherein the borate raw material powder consists of boron oxide, bismuth oxide and zinc oxide;
drying the wet mixture to obtain a dried mixture;
putting the dried mixture into a sintering device for sintering, and cooling after sintering to obtain a glass ceramic sintered body;
the low temperature curing method is carried out by a curing apparatus comprising:
a silver-coated silica gel particle filtering mechanism;
the colloid mill is used for mixing and grinding the silver-coated silica gel particles and the borate raw material powder;
drying means for receiving the moist mixture from the colloid mill and drying the mixture to obtain a dried mixture;
a sintering device for sintering the dried mixture;
apply silver-colored silica gel particle filter mechanism includes:
a weighing meter;
the first hopper is arranged right above the weighing meter;
a filter screen installed in the first hopper;
the first vibrating motor is arranged on the first hopper or the filter screen; and
the collecting box is placed on the weighing meter and is positioned right below the first hopper;
the drying device includes:
the water passing net is positioned right below the discharge port of the colloid mill and used for filtering water, and two vertical plates which are arranged oppositely are arranged on the water passing net;
the movable plate is arranged between the two vertical plates, two ends of the lower side of the movable plate are respectively in rotating fit with the vertical plates, the movable plate is provided with a first working position and a second working position, the movable plate is vertically arranged in the first working position, and the movable plate is horizontally opened outwards in the second working position;
the reset torsion spring is matched with the movable plate and is used for keeping the movable plate at the first working position;
the lower end of the push plate is abutted to the water passing net, the push plate and the movable plate are respectively positioned on two sides of the water passing net, and the two vertical plates, the movable plate and the push plate form a limiting space which is used for receiving a wet mixture from a discharge port of the colloid mill;
one end of the blowing pipe is arranged on the side wall of the vertical plate and used for blowing air to one side of the water passing net, and the other end of the blowing pipe is connected with the heating fan;
the second vibration motor is fixed at the lower part of the water passing net; and
and the piston rod of the pushing cylinder is fixed with the push plate and used for driving the push plate to move towards one end of the movable plate, and the movable plate is opened to discharge the dried mixture.
2. The method for low-temperature curing of silver-coated silica gel according to claim 1, wherein the dry mixture contains 40 to 70% by mass of the radioactive iodine-containing silver-coated silica gel particles and 30 to 60% by mass of the borate raw material powder.
3. The method for low-temperature curing of silver-coated silica gel according to claim 2, wherein the mass of radioactive iodine in the dried mixture is not more than 15% of the total mass of the mixture.
4. The method for curing silver-coated silica gel at low temperature according to claim 1, wherein the borate raw material powder comprises, by mass, 40% to 70% of boron oxide, 22% to 48% of bismuth oxide, and 8% to 12% of zinc oxide.
5. The method for curing a silver-coated silica gel at a low temperature according to claim 1, wherein the drying of the wet mixture is carried out by: and (3) ventilating and drying for 0.5-5 h at the temperature of between the normal temperature and 100 ℃.
6. The method for curing silver-coated silica gel at low temperature according to claim 1, wherein the dried mixture is sintered at 400 ℃ to 800 ℃ for 1 hour to 3 hours.
7. The method for low-temperature curing of silver-coated silica gel according to claim 1, further comprising a press-molding means for pressing the mixture obtained by the drying means into a block-like structure; the press forming device includes:
the hollow seat is arranged on one side of the movable plate and used for receiving the mixture dried by the drying device;
the supporting plate is arranged inside the hollow seat in a sliding sealing mode and is positioned below the hollow seat;
the supporting plate lifting mechanism is arranged below the supporting plate and used for driving the supporting plate to move up and down;
the pressing plate is positioned right above the hollow seat;
and the pressing plate lifting mechanism is arranged above the pressing plate and used for driving the pressing plate to move towards the inside of the hollow seat to extrude the dried mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910233651.8A CN109920574B (en) | 2019-03-26 | 2019-03-26 | Low-temperature curing method of silver-coated silica gel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910233651.8A CN109920574B (en) | 2019-03-26 | 2019-03-26 | Low-temperature curing method of silver-coated silica gel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109920574A CN109920574A (en) | 2019-06-21 |
| CN109920574B true CN109920574B (en) | 2020-11-24 |
Family
ID=66966963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910233651.8A Active CN109920574B (en) | 2019-03-26 | 2019-03-26 | Low-temperature curing method of silver-coated silica gel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109920574B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110197735B (en) * | 2019-06-28 | 2020-09-18 | 西南科技大学 | Hydration synthesis method of iodine-containing silver-coated silica gel glass solidified body |
| CN110289118B (en) * | 2019-06-28 | 2020-09-08 | 西南科技大学 | Hydration low-temperature curing method of iodine-containing silver-coated silica gel |
| CN111863305A (en) * | 2020-08-20 | 2020-10-30 | 中国原子能科学研究院 | Method for curing radioactive iodine-containing silver-coated silica gel |
| CN112201382A (en) * | 2020-10-26 | 2021-01-08 | 西南科技大学 | Low-temperature curing treatment method for radioactive silica gel waste |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54133299A (en) * | 1978-04-07 | 1979-10-16 | Hitachi Ltd | Silver adhering absorbent |
| EP0034037A1 (en) * | 1980-02-04 | 1981-08-19 | Hitachi, Ltd. | Method of preparation of material for adsorbing iodine |
| EP0118493A4 (en) * | 1982-08-16 | 1985-06-26 | Macedo Pedro B | Fixation of anionic materials with a complexing agent. |
| JPS6168127A (en) * | 1984-09-10 | 1986-04-08 | Hokkaido Electric Power Co Inc:The | Iodine removing method by metallic adhesive adsorbent |
| US4737316A (en) * | 1982-11-24 | 1988-04-12 | Pedro B. Macedo | Purification of contaminated liquid |
| US5826203A (en) * | 1996-08-20 | 1998-10-20 | Doryokuro Kakunenryo Kaihatsu Jigyodan | Method for solidifying waste containing radioactive iodine |
| CN104874356A (en) * | 2014-02-27 | 2015-09-02 | 株式会社东芝 | Iodine adsorbent, water treatment tank, iodine adsorbing system and method for manufacturing the iodine adsorbent |
-
2019
- 2019-03-26 CN CN201910233651.8A patent/CN109920574B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54133299A (en) * | 1978-04-07 | 1979-10-16 | Hitachi Ltd | Silver adhering absorbent |
| EP0034037A1 (en) * | 1980-02-04 | 1981-08-19 | Hitachi, Ltd. | Method of preparation of material for adsorbing iodine |
| EP0118493A4 (en) * | 1982-08-16 | 1985-06-26 | Macedo Pedro B | Fixation of anionic materials with a complexing agent. |
| US4659477A (en) * | 1982-08-16 | 1987-04-21 | Pedro B. Macedo | Fixation of anionic materials with a complexing agent |
| US4737316A (en) * | 1982-11-24 | 1988-04-12 | Pedro B. Macedo | Purification of contaminated liquid |
| JPS6168127A (en) * | 1984-09-10 | 1986-04-08 | Hokkaido Electric Power Co Inc:The | Iodine removing method by metallic adhesive adsorbent |
| US5826203A (en) * | 1996-08-20 | 1998-10-20 | Doryokuro Kakunenryo Kaihatsu Jigyodan | Method for solidifying waste containing radioactive iodine |
| CN104874356A (en) * | 2014-02-27 | 2015-09-02 | 株式会社东芝 | Iodine adsorbent, water treatment tank, iodine adsorbing system and method for manufacturing the iodine adsorbent |
Non-Patent Citations (1)
| Title |
|---|
| Bi2O3-ZnO-B2O3低熔点封接玻璃的烧结特性;何峰 等;《硅酸盐学报》;20091031;第37卷(第10期);论文引言、2-3部分 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109920574A (en) | 2019-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109920574B (en) | Low-temperature curing method of silver-coated silica gel | |
| CN109949962B (en) | Low-temperature curing method of silver-coated silica gel | |
| CN109775994B (en) | Low-temperature curing method for glass ceramic coated with silver silica gel | |
| CN109748509B (en) | Low-temperature curing method of borate glass ceramic coated with silver silica gel | |
| CN108484115B (en) | Porous material prepared by utilizing solid waste | |
| CN111584114B (en) | Method for solidifying high-level waste | |
| CN103237772B (en) | For cement solidification formula and the curing of nuclear power station high boric radioactive spent resin | |
| CN206304803U (en) | A kind of preliminary breaker of waste water clod for building | |
| CN112466503A (en) | Preparation method of glass ceramic body for solidifying Cs-containing soil | |
| CN101445259A (en) | Method for preparing micro-nano structure alumina particle | |
| CN209718119U (en) | A kind of fixed equipment of cutting tile | |
| CN111558610B (en) | Emergency treatment method for radioactive strontium contaminated soil | |
| US3993579A (en) | Method of encapsulating solid radioactive waste material for storage | |
| RU2589040C1 (en) | Method of solidifying tritium-containing petroleum oil | |
| RU2361299C1 (en) | Method of immobilisation of isotopes of radioactive wastes of transuranic elements (versions) | |
| RU2559205C2 (en) | Method of conditioning radioactive wastes of heat-insulating materials | |
| RU2165110C2 (en) | Ceramic sponge for concentration and hardening of liquid extrahazardous waste and method for its production | |
| JP2525790B2 (en) | Method for solidifying radioactive waste | |
| CN220534492U (en) | Compression molding equipment of hot metal bottle heat preservation refractory brick | |
| CN209040154U (en) | A kind of stone fabricated device | |
| CN114477733B (en) | Method for preparing granite-based glass solidified body through hydration sintering | |
| CN217615943U (en) | Raw material screening plant is used in cement goods manufacturing | |
| CN220657752U (en) | Reducing mechanism of concrete production | |
| CN213514690U (en) | Tile blank drying device with automatic temperature control system | |
| CN116200564B (en) | Rotary kiln for iron making by disposing solid waste blast furnace dust |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |