以機械合金法製備固溶粉體作為陶瓷共晶複合原料達成焚化飛灰穩定及回收再利用之技術研發
學年 97
學期 1
出版（發表）日期 2009-01-01
作品名稱 以機械合金法製備固溶粉體作為陶瓷共晶複合原料達成焚化飛灰穩定及回收再利用之技術研發
作品名稱（其他語言） A Study on Producing the Solid Solution as a Eutectic Composite Material of Ceramic Feed Stock by Mechanical Alloying Technique for Stabilization and Recovery of Mswi Fly Ash
著者 高思懷; 孫常榮
單位 淡江大學水資源及環境工程學系
描述 計畫編號：NSC98-2221-E032-003 研究期間：200908~201007 研究經費：1,193,000
委託單位 行政院國家科學委員會
摘要 都市垃圾焚化飛灰因掩埋土地受限及含有毒且移動性高的污染物質問題，使得 對於飛灰的處理及再利用逐漸受到重視。本研究團隊之開發目標在於「粉體於資材 化前先趨於穩定」及「飛灰粉體材料化」，因此本研究利用機械合金技術改良飛灰粉 體性質，以飛灰為合金粉母體，添加鋁矽酸鹽廢料後，經由調整機械化學的反應參 數，使飛灰於室溫產生固溶合金之反應，一方面利用機械力造成結晶結構不斷破壞， 使重金屬置入晶體缺陷，形成穩定的固溶體，而達成重金屬不溶出的目的，另一方 面形成的固溶合金粉為結構及營建陶瓷之共晶體，為一種共晶成份的複合材料，可 提供強度提升與燒結溫度降低之功效，成為生產陶瓷的添加劑，提升飛灰粉體價值， 且製程低耗能及污染低，因此為一項有價值研究的先趨研究。另外針對製備之合金 粉的表面特性和物理特性，以精密儀器進行觀察和結構分析評估其成效，以及探究 飛灰固溶體中重金屬固溶的擴散行為以及鍵結情況來討論重金屬穩定的機制。 fly ash has been taken as a great concern, because of the problems of the landfill sites is limiting, and the hazardous components still unstable in the environment for long term. In order to satisfy the goals of the sustainable environment, the recovering of the fly ash, and stabilizing the hazardous components in the fly ash before it is recovered, is becoming the important task in the future. The mechanical alloying technology is an innovational approach for the fly ash recovering. This technique is performed by adding the aluminosilicatecontained waste properly during the mechanical alloying of the fly ash, in order to enhance the efficiency of the mechanochemistry reaction. This will procure a better material for the recovery, and stabilizing the heavy metals in the same time. During the mechanical alloying, the crystalline structure will be destroyed constantly by mechanical force, and to result the diffusion of heavy metals in the matrix via substitution or interstitial atoms to form an insoluble state for the heavy metals. Furthermore, this solid solution, composite material of eutectic components, will become structural and constructional ceramics. It is an additive for the production of ceramics, is beneficial for the promoting of the strength and decreasing the sintering temperature. The eutectic composite of the solid solution can enhance the value of fly ash powders and the process will be low energy consumption and low pollution. Furthermore, the surface and nature characteristic of the composite powder will be analyzed by the precision instruments during the study, the behavior of the heavy metals diffusion in solid solution will be explored, and the mechanism of heavy metal stabilization by bonding condition will be discussed in the same time.
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