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Function ceramic material for efficiently filtering radioactive iodine and cesium, and preparation method thereof

A technology of radioactive iodine and functional ceramics, which is applied in the production of ceramic materials, ceramic products, clay products, etc., can solve the problem of less radioactive iodine filtration materials and technologies, low selectivity of zeolite filter materials, ammonium phosphomolybdate grains If it is too small, it can achieve strong ion exchange and immobilization capacity, increase porosity, and large specific surface area.

Inactive Publication Date: 2013-09-04
苏磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies and related materials have more or less problems, such as low selectivity of zeolite filter material, too small crystal grains of ammonium phosphomolybdate, toxicity of ferrocyanide, etc.
In addition, the current research literature and published patents are mainly focused on the filtration of radioactive cesium, and less involved in the filtration materials and technologies of radioactive iodine.

Method used

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  • Function ceramic material for efficiently filtering radioactive iodine and cesium, and preparation method thereof
  • Function ceramic material for efficiently filtering radioactive iodine and cesium, and preparation method thereof
  • Function ceramic material for efficiently filtering radioactive iodine and cesium, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh the raw materials according to the following proportions,

[0030] Sludge 40 Kg, clay (kaolin) 40 Kg, calcium carbonate 12 Kg, sawdust 8 Kg, liquid paraffin 5 Kg, iron oxide powder 6 Kg.

[0031] The preparation steps are as follows:

[0032] (1) According to the above formula, the raw materials are fully mixed and stirred to make a slurry, and the slurry is made into spherical particles with a diameter of 4 mm by a granulator, and dried to form a billet;

[0033] (2) Place the mud body prepared in step (1) in a high-temperature sintering furnace, 2 Firing under the atmosphere, when the temperature is raised from 80°C per hour to 550°C, keep it for 2 hours, then continue to heat up at a rate of 100°C per hour, until it reaches 1050°C, keep it for 4 hours, stop heating, and keep it at a rate of 150°C per hour The furnace temperature was lowered to room temperature to obtain a porous ceramic material with a diameter of 2 mm.

Embodiment 2

[0035] Weigh the raw materials according to the following proportions,

[0036] Sludge 40 Kg, clay (bentonite) 30 Kg, calcium carbonate 11 Kg, activated carbon 5 Kg, liquid paraffin 3 Kg, iron oxide powder 6 Kg.

[0037] The preparation steps are as follows:

[0038] (1) According to the above formula, the raw materials are fully mixed and stirred to make a slurry, and the slurry is made into spherical particles with a diameter of 4 mm by a granulator, and dried to form a billet;

[0039] (2) Place the mud body prepared in step (1) in a high-temperature sintering furnace, 2 Firing under atmosphere, when the temperature rises from 80°C per hour to 550°C, keep it for 2 hours, then continue to heat up at a rate of 100°C per hour, until it reaches 1100°C, keep it for 3 hours, stop heating, and keep it at a rate of 150°C per hour The furnace temperature was lowered to room temperature to obtain a porous ceramic material with a diameter of 5 mm.

Embodiment 3

[0041] The raw materials are weighed according to the following proportioning ratio, and the consumption of each composition is parts by weight:

[0042] Sludge 40 Kg, clay (activated clay) 20 Kg, calcium carbonate 13 Kg, sawdust 7 Kg, liquid paraffin 2 Kg, iron powder 5 Kg.

[0043] The preparation steps are as follows:

[0044] (1) According to the above formula, the raw materials are fully mixed and stirred to make a slurry, and the slurry is made into spherical particles with a diameter of 4 mm by a granulator, and dried to form a billet;

[0045] (2) Place the mud body prepared in step (1) in a high-temperature sintering furnace, under N 2 Firing under the atmosphere, when the temperature is raised from 80°C per hour to 600°C, keep it for 2 hours, then continue to heat up at a rate of 100°C per hour, until it reaches 1050°C, keep it for 4 hours, stop heating, and keep it at a rate of 200°C per hour The furnace temperature was lowered to room temperature to obtain a poro...

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Abstract

The present invention discloses a function ceramic material for efficiently filtering radioactive iodine and cesium, and a preparation method thereof. The material is prepared through the following steps that: industrial sludge and clay are adopted as main materials, active carbon or wood chips, calcium hydroxide or calcium carbonate, iron powder or iron oxide powder, liquid paraffin and other auxiliary materials are matched, processes of mixing, stirring, granulation and the like are performed, and sintering in performed in an oxygen deficiency atmosphere or a reduction atmosphere to prepare the material. The function ceramic material has characteristics of porous property, rich pores, large specific surface area, strong absorption capacity, high water filtration flow, efficient removal and immobilization of radioactive iodine and cesium in nuclear wastewater, and easy shape and size adjustment, and can be used for purification treatments of nuclear wastewater and medical radioactive wastewater.

Description

technical field [0001] The invention relates to a functional ceramic material used for purifying radioactive waste water and a preparation method thereof. Background technique [0002] According to statistics in 2005, nuclear power plants around the world account for about 16% of the total power generation, and nuclear energy has become one of the main energy sources in the world today. However, repeated nuclear power plant leakage accidents make people deeply realize that the peaceful use of nuclear energy is not harmless. In addition to nuclear leakage, under the normal operation of nuclear power plants, a large amount of radioactive waste water also contains a large amount of radionuclides. If not handled properly, these radioactive pollution will cause great harm to the environment, ecology and human beings. Therefore, the safe disposal of nuclear pollution has become a major problem in the world today. For decades, scientists from various countries have paid close att...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B33/132
CPCY02P40/60
Inventor 苏磊周景王永强杨坤董良杰
Owner 苏磊
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