發(fā)布時間：2018-04-01 19:32

  本文選題：銅爐渣　切入點：活性激發(fā)　出處：《工程科學(xué)學(xué)報》2017年09期

【摘要】：為了實現(xiàn)銅爐渣的廢物利用,以堿激發(fā)方式為主研究銅爐渣制備礦用膠凝材料的可能性.選取生石灰、NaOH和早強劑組成的混合物作為復(fù)合激發(fā)劑,開展銅爐渣活性激發(fā)和充填材料制備試驗,并采用X射線衍射和掃描電子顯微鏡對銅爐渣水化產(chǎn)物進行分析.試驗結(jié)果表明,各激發(fā)劑對銅爐渣活性的影響順序依次為生石灰早強劑NaOH,在復(fù)合激發(fā)劑的作用下爐渣凈漿試樣的7和28 d強度分別可以達到1.5和3.0 MPa以上.銅爐渣尾砂充填料28 d強度為1.0 MPa,流動性良好,滿足充填材料要求.銅爐渣早期水化產(chǎn)物主要有片狀的Ca(OH)_2和C-S-H凝膠,隨著養(yǎng)護時間的增加,C-S-H凝膠Ca/Si比不斷減小,水化產(chǎn)物結(jié)構(gòu)更加致密.養(yǎng)護時間至28 d時,銅爐渣中活性成分基本反應(yīng)完全.
[Abstract]:In order to realize the waste utilization of copper slag, the possibility of preparing mineral cementitious material from copper slag was studied by alkali excitation.The mixture of quicklime NaOH and early strength agent was selected as the composite activator to conduct the experiments of active activation of copper slag and preparation of filling material. The hydration products of copper slag were analyzed by X-ray diffraction and scanning electron microscope.The results show that the order of the influence of the activators on the activity of copper slag is NaOH, a quicklime early strength agent, and the strength of clean slurry of slag in 7 days and 28 days can reach more than 1.5 and 3.0 MPa respectively under the action of compound activator.The strength of copper slag tailings filling material is 1.0 MPa for 28 days, and the fluidity is good, which can meet the requirements of filling material.The early hydration products of copper slag mainly consist of Ca(OH)_2 and C-S-H gels. With the increase of curing time, the Ca/Si ratio of C-S-H gel decreases and the structure of hydration products becomes denser.When the curing time is up to 28 days, the basic reaction of active components in copper slag is complete.
【作者單位】： 北京科技大學(xué)土木與資源工程學(xué)院;金屬礦山高效開采與安全教育部重點試驗室;
【基金】：國家自然科學(xué)基金資助項目(51374034) 國家“十二五”科技支撐計劃資助項目(2012BAB08B02) 北京市科委資助項目(Z161100001216002)
【分類號】：TD853.34;X758
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本文編號：1696994