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为了实现铜炉渣的废物利用,以碱激发方式为主研究铜炉渣制备矿用胶凝材料的可能性.选取生石灰、NaOH和早强剂组成的混合物作为复合激发剂,开展铜炉渣活性激发和充填材料制备试验,并采用X射线衍射和扫描电子显微镜对铜炉渣水化产物进行分析.试验结果表明,各激发剂对铜炉渣活性的影响顺序依次为生石灰>早强剂>NaOH,在复合激发剂的作用下炉渣净浆试样的7和28 d强度分别可以达到1.5和3.0 MPa以上.铜炉渣尾砂充填料28 d强度为1.0 MPa,流动性良好,满足充填材料要求.铜炉渣早期水化产物主要有片状的Ca(OH)_2和C-S-H凝胶,随着养护时间的增加,C-S-H凝胶Ca/Si比不断减小,水化产物结构更加致密.养护时间至28 d时,铜炉渣中活性成分基本反应完全.
In order to achieve the utilization of copper slag waste, the possibility of using copper slag as raw material for preparing mineral cementitious material was investigated by means of alkali excitation.A mixture of quicklime, NaOH and early strength agent was selected as the composite activator to activate copper slag activation and filling The preparation of materials and the analysis of the hydration products of copper slag by X-ray diffraction and scanning electron microscopy.The results show that the influence of each activator on the activity of copper slag is as follows: quick lime> early strength agent> NaOH, , The strength of 7 and 28 d of slag cement paste can reach 1.5 and 3.0 MPa respectively, the strength of copper slag tailings filling material is 1.0 MPa for 28 d, and the fluidity is good, which meets the requirement of filling material. The products mainly contain flaky Ca (OH) 2 and CSH gel. With the increase of curing time, the Ca / Si ratio of CSH gel decreases and the structure of hydration products becomes more compact. When the curing time is up to 28 days, The basic reaction in the active ingredient is complete.