本文關(guān)鍵詞： 銅爐渣 機(jī)械活化 堿激發(fā) 充填膠凝劑 水化機(jī)理　出處：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年09期 　論文類型：期刊論文

【摘要】：為了實(shí)現(xiàn)銅爐渣的回收利用,通過機(jī)械活化和堿激發(fā)的方式制備銅爐渣膠凝材料,并利用X線衍射(XRD)、掃描電鏡(SEM)、能譜儀(EDS)和礦渣玻璃體分相結(jié)構(gòu)模型對銅爐渣水化機(jī)理進(jìn)行分析。研究結(jié)果表明:當(dāng)比表面積為520 m~2/kg時(shí),銅爐渣凈漿試樣的7 d和28 d強(qiáng)度分別達(dá)到2.4 MPa和3.3 MPa;當(dāng)灰砂比為1:1時(shí),銅爐渣全尾砂充填料的7 d和28 d強(qiáng)度分別達(dá)到0.7 MPa和1.0 MPa,滿足當(dāng)?shù)氐V山充填的要求。水化初期,爐渣玻璃體中的富鈣相和高鈣石灰共同水化生成了Ca(OH)2,其進(jìn)一步與富硅相反應(yīng)生成C-S-H凝膠等水化產(chǎn)物。隨著水化反應(yīng)的繼續(xù)進(jìn)行,試樣內(nèi)部的孔隙逐漸被水化產(chǎn)物填充并縮小至孔狀,漿體結(jié)構(gòu)更加致密。
[Abstract]:In order to realize the recovery and utilization of copper slag, copper slag cementitious material was prepared by mechanical activation and alkali excitation. The hydration mechanism of copper slag was analyzed by means of X-ray diffractometer (XRD), scanning electron microscope (SEM), energy spectrometer (EDS) and vitreous structure model of slag. The results showed that the specific surface area was 520mg / kg. The strength of copper slag slurry samples at 7 and 28 days reached 2.4 MPa and 3.3 MPa, respectively, and when the ratio of ash to sand was 1: 1, the strength of copper slag full tailings filling material reached 0.7 MPa and 1.0 MPA respectively, which met the requirements of local mine filling, and the initial hydration stage. Calcium rich phase in slag vitreous and lime with high calcium hydrate together to form CaOH2, which further reacted with silicon-rich phase to form hydration products such as C-S-H gel. The pore inside the sample was gradually filled with hydration products and reduced to pore shape, and the slurry structure became denser.
【作者單位】： 北京科技大學(xué)金屬礦山高效開采與安全教育部重點(diǎn)實(shí)驗(yàn)室;北京科技大學(xué)土木與環(huán)境工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51374034,51304011,51374035) 國家“十二五”科技支撐計(jì)劃項(xiàng)目(2012BAB08B02)~~
【分類號】：TQ177

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