發(fā)布時(shí)間：2018-03-21 07:32

  本文選題：蝕變巖型金礦尾礦　切入點(diǎn)：機(jī)械粉磨　出處：《中國科技論文》2017年15期 　論文類型：期刊論文

【摘要】：為了進(jìn)一步探索硅質(zhì)尾礦火山灰性能的活化方法,以蝕變巖型金礦尾礦為主要原料,采用活性指數(shù)測定的方法,研究粉磨細(xì)度、助磨劑、化學(xué)活化劑對尾礦火山灰性能的影響。通過對水化樣品的X射線衍射分析和電子探針分析,查明了尾礦在水泥水化中的作用,并對活化尾礦的應(yīng)用性能進(jìn)行了實(shí)驗(yàn)研究。研究結(jié)果表明,機(jī)械粉磨能夠有效提高尾礦的火山灰性能,當(dāng)尾礦比表面積超過400m2/kg時(shí),28d活性指數(shù)可達(dá)到65%以上;硬脂酸鈉助磨劑和氯化鈣活化劑的添加均有利于活性指數(shù)的提高;活化尾礦在水泥水化過程中主要起"晶核"作用,可促進(jìn)水泥的水化,并參與部分水化反應(yīng);當(dāng)活化尾礦用量小于40%時(shí),可用于制備FC A03(JG/T 266-2011)等級的發(fā)泡水泥。
[Abstract]:In order to further explore the activation method of volcanic ash properties of siliceous tailings, the grinding fineness and grinding aids were studied using altered rock type gold tailings as the main raw materials, using the method of activity index measurement. The effect of chemical activator on the performance of pozzolanic ash from tailings was investigated by X-ray diffraction and electron probe analysis of hydrated samples. The application performance of activated tailings is studied experimentally. The results show that mechanical grinding can effectively improve the pozzolanic performance of tailings, and when the specific surface area of tailings exceeds 400m2 / kg, the activity index can reach more than 65% for 28 days. The addition of sodium stearate grinding aids and calcium chloride activators is beneficial to the increase of the activity index, the activated tailings play the role of "crystal nucleus" in the hydration of cement, which can promote the hydration of cement and participate in the partial hydration reaction. When the amount of activated tailings is less than 40, it can be used to prepare foamed cement of FC A03 JG / T 266-2011.
【作者單位】： 山東科技大學(xué)化學(xué)與環(huán)境工程學(xué)院;金正大生態(tài)工程集團(tuán)股份有限公司復(fù)合肥料國家地方聯(lián)合工程研究中心;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51674161) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目(20133718110005) 山東省2016年重點(diǎn)研發(fā)計(jì)劃資助項(xiàng)目(2016GSF116013)
【分類號】：TU528
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本文編號：1642870