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Method for preparing lower-radioactivity radiating red mud ceramic material

A ceramic material and low-radioactivity technology, which is applied in the field of preparing low-radiation red mud ceramic materials, can solve the problems of red mud consumption, economic benefits, and environmental protection at the same time, and achieve low cost, wide sources, and reduced radioactivity. Effect

Inactive Publication Date: 2011-05-18
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, although the current comprehensive utilization technologies of red mud are reasonable to a certain extent, they cannot take into account red mud consumption, economic benefits and environmental protection at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Ingredients according to mass percentage: red mud (taken from Guangxi Pingguo Aluminum Co., Ltd.) 40%, red sandstone (taken from Guangxi Jinxiu Dayaoshan) 47%, barium carbonate (chemically pure) 8%, calcium fluoride (Chemical purity) 5%; The chemical composition of red mud and red sandstone are shown in Table 1 and Table 2 respectively;

[0021] (2) Put the material obtained in step (1) into the ball mill device for ball milling and mixing for 24 hours;

[0022] (3) Dry the material obtained in step (2) at 100°C for 12 hours;

[0023] (4) Put the material obtained in step (3) into a Φ20mm mold, and keep the pressure under 10MPa for 1 minute to obtain a green body;

[0024] (5) The green body obtained in step (4) is sintered in a box-type resistance furnace at 1060°C for 1 hour, and cooled to room temperature to obtain a red mud ceramic material;

[0025] (6) Use a radiographic detector to detect radioactive radiation dose, select the total count mode-Total / Timer, and the rad...

Embodiment 2

[0027] (1) Ingredients according to mass percentage: red mud (taken from Guangxi Pingguo Aluminum Company) 45%, red sandstone (taken from Dayaoshan, Jinxiu, Guangxi) 40%, barium carbonate (chemically pure) 8%, calcium fluoride (Chemically pure) 5%, calcium oxide (analytical pure) 2%; the chemical components of red mud and red sandstone are shown in Table 1 and Table 2 respectively;

[0028] (2) Put the material obtained in step (1) into the ball mill device and ball mill the mixture for 36 hours;

[0029] (3) Dry the material obtained in step (2) at 100°C for 12 hours;

[0030] (4) Put the material obtained in step (3) into a Φ50mm mold, and keep the pressure under 10MPa for 1 minute to obtain a green body;

[0031] (5) The green body obtained in step (4) is sintered in a box-type resistance furnace at 1020°C for 1.5 hours, and cooled to room temperature to obtain a red mud ceramic material;

[0032] (6) Use a radiographic detector to detect radioactive radiation dose, select the total...

Embodiment 3

[0034] (1) Ingredients according to mass percentage: red mud (taken from Guangxi Pingguo Aluminum Co., Ltd.) 50%, red sandstone (taken from Guangxi Jinxiu Dayaoshan) 30%, barium carbonate (chemically pure) 10%, calcium fluoride (Chemically pure) 6%, magnesium oxide (analytical pure) 2%, calcium oxide (analytical pure) 2%; the chemical composition of red mud and red sandstone are shown in Table 1 and Table 2 respectively;

[0035] (2) Put the material obtained in step (1) into the ball mill device for ball milling and mixing for 24 hours;

[0036] (3) Dry the material obtained in step (2) at 100°C for 12 hours;

[0037] (4) Put the material obtained in step (3) into a Φ20mm mold, and keep the pressure under 10MPa for 1 minute to obtain a green body;

[0038] (5) The green body obtained in step (4) is sintered in a box-type resistance furnace at 1040°C for 1 hour, and cooled to room temperature to obtain a red mud ceramic material;

[0039] (6) Use a radiographic detector to detect radio...

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Abstract

The invention discloses a method for preparing a lower-radioactivity radiating red mud ceramic material, which comprises the following raw materials in percent by mass: 28-70 percent of red mud, 28-70 percent of red sandstone, 1-20 percent of barium compound or witherite and 1-10 percent of fluxing agent, wherein the fluxing agent is one or more of calcium fluoride, aluminum oxide, magnesium oxide, calcium oxide and silica. The method comprises the steps of: 1, placing the raw materials in a ball-milling device for ball-milling and mixing for 12-48h; 2, drying the raw materials obtained from the step 1 at a temperature of 60-120 DEG C for 6-24h; 3, pressing and forming or plastically forming the raw materials obtained from the step 2 to prepare a blank body; and 4, sintering the blank obtained from the step 3 at a temperature of 900-1300 DEG C for 1-5h, and cooling to the room temperature to prepare a finished product. The invention has the advantages of wide sources of the raw materials and extremely low cost, and is favorable for reducing the red mud radioactivity radiation dose by 30-45 percent to reach the natural radioactivity background level.

Description

Technical field [0001] The invention relates to a method for preparing a red mud ceramic material with low radioactive radiation. Background technique [0002] Red mud is a solid waste with strong alkalinity and high radioactive radiation discharged from the alumina production process. In 2010, the annual discharge of red mud in my country is estimated to be as high as 45-50 million tons, and the accumulated stock of red mud in China has exceeded several hundred million tons. The average utilization rate of red mud in the world is about 15%, and the utilization rate of red mud in my country is much lower than this. Red mud is highly alkaline and highly radioactive. The accumulation of a large amount of red mud pollutes the environment and seriously threatens the property safety of the country and the people. [0003] Countries all over the world have stepped up efforts to study the ways of using red mud. Foreign countries mainly focus on the recovery of useful metals (iron oxide...

Claims

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Application Information

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IPC IPC(8): C04B35/00C04B35/622
Inventor 覃烁吴伯麟彭仙
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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