本文選題：高爐礦渣　切入點：機械粉磨　出處：《武漢理工大學(xué)》2013年碩士論文

【摘要】：礦渣是冶煉生鐵時排放出的工業(yè)廢渣,是一種具有良好潛在活性的膠凝材料,廣泛應(yīng)用于建筑材料領(lǐng)域。但是,這種潛在活性必需用機械粉磨的方式來激活。由于采用不同的粉磨方式及機理,礦渣微粉的宏觀和微觀性能存在很大的差異,而宏觀和微觀的差異是影響礦渣水化過程和結(jié)果的主要因素。因此,對機械粉碎礦渣微粉顆粒性能進(jìn)行深入的研究與分析,總結(jié)粉磨過程中的變化規(guī)律及影響粉磨效果的微觀特性因素,可為改善礦渣的易磨性和降低礦渣微粉粉磨能耗提供理論基礎(chǔ),同時對提高我國礦渣現(xiàn)有的應(yīng)用水平,促進(jìn)鋼鐵和水泥工業(yè)節(jié)能、減排發(fā)展具有重要的實際意義。 本文全面、系統(tǒng)的研究與分析了不同方式機械粉碎的礦渣微粉顆粒性質(zhì),對粉磨過程礦渣微粉的粒度和粒度分布特征、微觀形貌進(jìn)行了實驗研究,對微觀形貌進(jìn)行了量化分析,論文研究成果可為不同粉磨設(shè)備和工藝的產(chǎn)品特征分析和微觀形貌量化提供一定的理論與實驗研究基礎(chǔ)。 論文首先分析了機械粉碎礦渣常用的粉磨設(shè)備和粉磨工藝,論述了影響礦渣粉磨效果的因素。在此基礎(chǔ)上,采用球磨和攪拌磨對礦渣進(jìn)行了粉磨實驗；對所獲得的不同的礦渣微粉樣品及工業(yè)立磨礦渣微粉產(chǎn)品,進(jìn)行了激光粒度分析；運用電子顯微成像原理,通過粉末制樣方法的研究,獲得了礦渣微粉的SEM圖像,對不同粉磨方式的礦渣微粉的微觀形貌進(jìn)行了定性和定量分析。 粒度分析及粒群特征參數(shù)研究結(jié)果表明：實驗球磨、實驗攪拌磨以及工業(yè)立磨礦渣粉顆粒粒群均符合RRB分布,工業(yè)立磨的粒度分布最窄,球磨礦渣微粉的粒度分布最寬,其均勻性比攪拌磨和工業(yè)立磨立磨礦渣粉差。隨著粉磨時間的延長,礦渣微粉顆粒分布逐漸趨于均勻合理,顆粒中位徑變小,80μm篩余減小,比表面積增加,粉磨到一定程度,應(yīng)結(jié)合比表面積和特征粒徑評價礦渣粉磨效果。 微觀形貌分析及定量研究結(jié)果表明：球磨和攪拌磨在粉磨初期,顆粒多為粗大礫石狀,有部分多角狀顆粒和磨蝕痕跡,隨著粉磨時間的延長,接近等軸狀的細(xì)小顆粒增多,多角狀顆粒和磨蝕痕跡均減小。采用形狀指數(shù)、圓度系數(shù)、扁平度、棱角度和表面粗糙度可定量表征礦渣粉體的微觀形貌,球磨和攪拌磨粉磨過程中,隨粉磨時間的延長,礦渣粉體群形狀指數(shù)、扁平度、棱角度和表面粗糙度均減小,圓度系數(shù)增加,礦渣微觀形貌將越趨于球形。實驗球磨和攪拌磨礦渣微粉粉磨相同時間時,攪拌磨形貌優(yōu)于球磨,球磨和攪拌磨礦渣粉圓度系數(shù)均高于我國水泥企業(yè)水泥的圓度系數(shù)平均值,工業(yè)立磨圓度系數(shù)明顯低于球磨和攪拌磨,形狀指數(shù)、扁平度、棱角度和表面粗糙度偏高。球磨和攪拌磨粉磨過程中的礦渣粉體群圓度系數(shù)、棱角度和表面粗糙度分布均符合正態(tài)分布,粉磨過程分布變化趨勢基本相似。但攪拌磨圓度系數(shù)0.4以下顆粒相對球磨少,變化小；棱角度系數(shù)和表面粗糙度系數(shù)分布較球磨窄。
[Abstract]:Industrial waste slag is emitted when smelting pig iron, is a good potential activity of cementitious materials, widely used in the field of building materials. However, the potential activity required by mechanical grinding way to activate. Due to the use of different grinding methods and mechanism, there are great differences between the macroscopic and microscopic properties of slag powder however, the macroscopic and microscopic differences are the main factors that influence the slag hydration process and results. Therefore, in-depth research and Analysis on the mechanical grinding of slag particle properties, microscopic characteristics of regularity and influencing factors of grinding effect summed up in the process of grinding, can improve the grindability and reduce slag slag grinding the energy consumption and provide a theoretical basis, at the same time to improve the application level of our existing slag, steel and cement industries to promote energy-saving emission reduction, which has important practical significance.
In this paper, systematic research and analysis of different ways of mechanical grinding of slag particle properties, particle size and particle size distribution of slag powder grinding process, microstructure was studied. The microstructure of the quantitative analyses, provide the theoretical and Experimental Research on certain products based feature analysis and morphology of quantitative research for different grinding equipment and technology.
This paper first analyzes the mechanical crushing and grinding equipment and grinding process of slag used, discusses the factors influencing slag grinding effect. On this basis, using ball milling and grinding experiment of stirring mill slag; the different slag samples and industrial mill slag powder products, the use of electronic laser particle size analysis; microscopic imaging principle, through the study of powder sample preparation method, SEM image of slag powder was obtained, the microstructure of slag powder of different grinding methods of qualitative and quantitative analysis.
Particle size analysis and particle swarm parameters the results show that the experimental milling experiment, stirring mill and industrial mill slag powder particle swarm conformed to RRB distribution, industrial mill narrow particle size distribution, particle size distribution of slag powder is the widest, the uniformity ratio of stirring mill and industrial mill grinding slag powder difference with the grinding time, the particle size distribution of slag powder tends to be uniform and reasonable, the size of smaller particles, 80 m sieve residue decreases, the specific surface area increased and grinding to a certain extent, should be combined with the specific surface area and particle size characteristics evaluation of slag grinding effect.
The micro morphology analysis and quantitative research results indicate that the ball milling and mixing mill in grinding stage, particles are coarse gravels, some angular particles and abrasion mark, as the grinding time, fine particles near equiaxed polyhedral particles and increase abrasion mark decrease. The round shape index. Coefficient of flatness, edge angle, and surface roughness of the micro morphology of quantitative characterization of slag powder, ball milling and mixing mill grinding process, the grinding time, slag powder group shape index, flatness, edge angle and surface roughness decreased, roundness coefficient increases, the microstructure of slag the more spherical. The experiment of ball milling and mixing mill slag powder grinding the same time stirring mill is better than that of morphology milling, milling and grinding of slag powder mixing coefficient was higher than the number of roundness Department of cement enterprises of China's cement industry to establish the average. Roundness coefficient was significantly lower than that of ball milling and mixing mill, shape index, flat degree, high degree of angularity and surface roughness. The stirring ball milling and grinding process of slag powder group roundness coefficient, edge angle and surface roughness distribution accord with the normal distribution, distribution and changing trend of grinding process is similar. The mixing degree of roundness coefficient below 0.4 particle relative small changes; ball milling, edge angle coefficient and surface roughness coefficient distribution is milling narrow.

【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU521.4

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