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Copper mine tailing slag porous ceramic material and preparation method thereof

A technology for porous ceramics and tailing slag, which is applied in the field of copper mine tailings slag porous ceramic materials and preparation to achieve the effects of enhancing compressive strength, large utilization and high porosity

Inactive Publication Date: 2013-02-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no report on the preparation of porous ceramic materials with high strength and porosity by using copper mine tailings as raw materials and adding lignosulfonate as a binder

Method used

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  • Copper mine tailing slag porous ceramic material and preparation method thereof
  • Copper mine tailing slag porous ceramic material and preparation method thereof
  • Copper mine tailing slag porous ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Copper ore flotation tailings are used as raw material, and kaolin is used as binder. The copper ore tailings were taken from the tailings dam of the Dexing Copper Mine, and analyzed by XRF. The results are shown in Table 1:

[0033] Table 1

[0034]

[0035]

[0036] Take 100 parts of beneficiation tailings from Dexing Copper Mine, 30 parts of carbon powder, 20 parts of kaolin, and 3 parts of feldspar, mix them evenly, put them into a steel mold, press for 3 minutes under a pressure of 8MPa, take out the green body, and let it dry naturally , put it into a high-temperature electric furnace, raise the temperature from room temperature to 1100° C. at a rate of 5° C. / min, keep it for sintering for 1 hour, take it out after cooling, and obtain porous ceramics. The apparent porosity of porous ceramics is 41.07%, the water absorption rate is 30.68%, and the bulk density is 1.78g / cm 3 , the compressive strength is 2.7MPa, the acid resistance is 96.82%, and ...

Embodiment 2

[0037] Example 2 Copper ore flotation tailings are used as raw material (same as Example 1), and sodium lignosulfonate is used as binder.

[0038] Take 100 parts of Dexing copper mine beneficiation tailings, 30 parts of carbon powder, 3 parts of feldspar, 15 parts of sodium lignosulfonate, mix them evenly, put them into a steel mold, press for 3 minutes under a pressure of 8 MPa, and take out the green body , after natural air-drying, put it into a high-temperature electric furnace, raise the temperature from room temperature to 1100°C at a rate of 5°C / min, keep it for sintering for 1 hour, take it out after cooling, and obtain porous ceramics. The apparent porosity of porous ceramics is 56.93%, the water absorption rate is 52.78%, and the bulk density is 1.09g / cm 3 , the compressive strength is 15.8MPa, the acid resistance is 98.87%, and the alkali resistance is 99.13%. It can be found that using sodium lignosulfonate as a binder under the same conditions, compared with usin...

Embodiment 3

[0039] Example 3 Copper ore flotation tailings are used as raw material (same as Example 1), and water glass is used as binder.

[0040]Take 100 parts of Dexing copper mine beneficiation tailings, 30 parts of carbon powder, 5 parts of serpentine, and 25 parts of water glass, mix them evenly, put them into a steel mold, press for 3 minutes under a pressure of 10 MPa, take out the green body, and naturally After air-drying, put it into a high-temperature electric furnace, raise the temperature from room temperature to 1080°C at a rate of 3°C / min, keep it warm for sintering for 80min, take it out after cooling, and obtain porous ceramics. The apparent porosity of porous ceramics is 39.76%, the water absorption rate is 28.01%, and the bulk density is 1.91g / cm 3 , the compressive strength is 1.48MPa, the acid resistance is 98.65%, and the alkali resistance is 98.27%.

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Abstract

A copper mine tailing slag porous ceramic material comprises copper mine tailing slag, a pore-foaming agent, an adhesion agent and a fluxing agent. A preparation method comprises the steps of using the copper mine tailing slag as aggregate, adding the pore-foaming agent, the adhesion agent, the fluxing agent and water to be stirred evenly, using a mold to perform compression molding to obtain a blank, controlling the temperature and sintering through a high-temperature procedure after drying, and obtaining porous ceramics. Raw materials used by the copper mine tailing slag porous ceramic material are cheap and easy to obtain, the compression strength of the porous ceramic material can be remarkably improved and can reach to 5-25 MPa only by adding the copper mine tailing slag and a small amount of additives, and the apparent porosity can reach to 40%-65%. A large amount of beneficiation tailing slag can be utilized effectively, the environmental pollution is reduced, wastes are turned into wealth, and the prepared porous ceramic material can be used as an excellent adsorbing material and a filter material. The technical process is simple, the utilization amount of the copper mine tailing slag is large, secondary pollution is not caused, the porous ceramic material is high in compression strength and porosity, and the resource utilization of the copper mine tailing slag is achieved. The copper mine tailing slag porous ceramic material is suitable for industrial production.

Description

technical field [0001] The invention relates to a copper ore tailing slag porous ceramic material and a preparation method thereof, belonging to the technical field of ceramic material preparation. Background technique [0002] my country is a big mining country, and the stockpile and annual emissions of mining solid waste are huge. At present, there are more than 280,000 state-owned, township and individual mining enterprises in the country, and the total amount of accumulated tailings is about 6 billion tons, which is still growing at a rate of no less than 300 million tons every year. The tailings are stored in the tailings pool by natural accumulation method, which not only occupies a large amount of land, pollutes the environment of the mining area and surrounding areas, but also needs to invest a large amount of treatment funds that cannot be recovered every year. The tailings have become a heavy burden for mining enterprises. burden. The successful disposal and util...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/63C04B35/00C04B35/622
Inventor 曹占芳钟宏王帅刘广义李昌新
Owner CENT SOUTH UNIV
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