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The use of cryogenic ceramic permeable material for the preparation of industrial waste residue

Author: TaoMinLong
Tutor: ZhangZhaoShu
School: Kunming University of Science and Technology
Course: Applied Chemistry
Keywords: Phosphorus slag Activation Chemically Bonded Ceramics permeable material
CLC: TQ174.6
Type: Master's thesis
Year: 2009
Downloads: 58
Quote: 0
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Abstract


Permeable material is essentially a class of non-closed porous material that enable water to infiltrate through material surface and even below the ground floor of material, which would supplement the groundwater, which is a green environmental protection new product in recent years. It can be widely used in parks, squares, sidewalks, residential areas and other places of the road, keeping the regulation of temperature and humidity environment of people living, maintaining the ecological balance of surface features.Phosphorus slag is a kind of waste residue which produced in the process of fetching yellow phosphorus by electric furnace legal institutions, since containing the elements phosphorus and fluorine, holding-up for a long time, it not only brings about environmental pollution but also occupies land resources, leading to waste of resources. Phosphorus slag mainly confined to cement and building material industry in recent years, does not make the best of its resource value. Developing a kind of phosphorus integrative utilization technology, not only accords with the national environment protect and resources economy developing policy but also possesses important social, economic and environmental significances.In this paper, through physical and chemistry activation technology, causes the phosphorus dregs vitreous body structure depolymerization and gathers once again under the aqueous phase medium the synthesis by the silicon aluminum long chain primarily ceramics body structure, which is performance low-temperature ceramic permeable material. Pilot study shows that:(1)Mechanical grinding increase the pellet relative surface, obtain the good grain-size distribution, cause the adhesion particle to be dispersed, produce the newborn surface, form the surface defect, speed up active SiO2, Al2O3 dissolves, and be advantageous to exterior ion invasion, thus provide the prerequisite for the active display.(2)Deploy Na20、SiO2 and Al2O3 of chemical stimulation reasonly can be prepared more than 100MPa compressive strength low-temperature ceramic composite.(3)In the activating agent certain circumstances, affect the material properties of the main factors have powder, aggregate, water-cement ratio, mixing ratio, bone glue process and conservation methods. In the best conditions, the use of phosphorous slag prepared low-temperature ceramic permeable material compressive strength more than 40MPa, permeability coefficient more than 4mm/s.(4) Phosphorous slag cementations material particles overlap each other and form a skeleton, forming a large number of connected holes, so that low-temperature ceramic permeable material has certain strength but also has good infiltrate water function.(5)Low-temperature ceramic material by phosphorous slag exist CSH and hydration products carbonate phase, has microscopic structure which is similar with the opal, and there is no [SiO6], [SiO4] was not isolated, but each [SiO4] around with other [SiO4] connected with a three-dimensional network structure, the reaction system Al3+ion basically occupies tetrahedral coordination position to participate in the formation of three-dimensional network structure.(6)The technology economic analysis indicated that the low-temperature ceramic permeable materials has the incomparable competitive advantage, the society, the environmental protection and the economic efficiency are extremely remarkable.

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CLC: > Industrial Technology > Chemical Industry > Silicate > Ceramic Industry > Production process and equipment
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