本文選題：煤矸石　切入點：發(fā)泡陶瓷　出處：《武漢理工大學》2015年碩士論文

【摘要】：針對目前墻體保溫材料及煤矸石高附加值利用存在的問題,本文在研究煤矸石化學成分組成特點的基礎上,采用粉末坯體發(fā)泡工藝制備出了一種煤矸石摻量高達90wt%,理論上可提供1/6~1/3熱能,且具有耐久、隔音、輕質、高強等優(yōu)良性能的生態(tài)環(huán)保型發(fā)泡陶瓷保溫板,并研究了坯料主要化學成分組成、粉磨工藝和燒成工藝與發(fā)泡陶瓷性能的關系。通過XRD、SEM、TG-DSC、XRF、LPS等分析測試手段探討了影響發(fā)泡陶瓷性能的因素及作用機理。首先,對發(fā)泡陶瓷坯料化學成分組成進行了設計,研究了Fe2O3、MgO、Al2O3、發(fā)泡劑摻量與發(fā)泡陶瓷性能的關系及作用機理。試驗結果表明:Fe2O3在高溫條件下分解產生的氧氣和Fe2+,可調節(jié)發(fā)泡劑產生氣體的速率和降低液相產生溫度,從而表現(xiàn)出助熔、改善孔結構、拓寬燒成溫度范圍的作用;MgO也具有與Fe2O3相似的作用;Al2O3表現(xiàn)出穩(wěn)泡及促進晶相的產生,從而提高材料力學性能的作用;坯料中復合發(fā)泡劑外摻量為0.1wt%時即可燒制出含有大量均勻氣孔的發(fā)泡陶瓷,適宜外摻量為0.3~2.0wt%,外摻量過多可導致發(fā)泡陶瓷孔結構和性能的惡化。其次,研究了粉磨工藝與發(fā)泡陶瓷性能的關系。探討了粉磨助劑及粉磨時間對坯料粒度分布和發(fā)泡陶瓷性能的影響。試驗結果表明:粉磨助劑和粉磨時間主要通過影響坯料混合均勻性和坯料的細度及粒度分布來影響發(fā)泡陶瓷的孔隙結構和性能;濕法粉磨工藝與添加0.035%三乙醇胺干法粉磨工藝燒成的發(fā)泡陶瓷孔結構和性能相似,然而濕法粉磨工藝復雜、能耗高、制備周期長,因此可被添加三乙醇胺干法粉磨工藝所代替。最后,研究了燒成工藝與發(fā)泡陶瓷性能的關系。采用單因素變量法分析了燒成溫度和保溫時間對發(fā)泡陶瓷性能的影響。試驗結果表明:燒成溫度和保溫時間均對發(fā)泡陶瓷孔結構和抗壓強度影響顯著,對吸水率影響較小。升高燒成溫度或延長保溫時間,在促使氣泡充分長大的同時,可提高氣泡孔徑的一致性,使表觀密度和吸水率降低,但燒成溫度過高或保溫時間過長,會破壞孔結構,導致連通孔和“孔窗”的產生,從而提高表觀密度和吸水率。此外,總結了發(fā)泡陶瓷性能之間的影響規(guī)律與關系:發(fā)泡陶瓷的性能主要受孔結構和表觀密度的影響。
[Abstract]:In view of the problems existing in the high value-added utilization of wall insulation materials and gangue, this paper studies the characteristics of chemical composition of coal gangue.A kind of eco-environment-friendly foamed ceramic insulation board with excellent properties such as durability, sound insulation, light weight, high strength and so on has been prepared by using powder billet foaming process, which can provide 1 / 6 / 1 / 3 heat energy in theory, and the content of coal gangue is as high as 90 wts.The relationship between the chemical composition, grinding process and sintering process of the billets and the properties of foamed ceramics was also studied.The factors affecting the properties of foamed ceramics and the mechanism were discussed by means of the analysis and measurement of XRDX SEMX TG-DSCN and XRF LPS.Firstly, the chemical composition of foamed ceramic billets was designed, and the relationship between the amount of foaming agent and the properties of foamed ceramics was studied.The experimental results show that the oxygen and Fe2 produced by the decomposition of Fe2O3 at high temperature can adjust the rate of gas produced by foaming agent and lower the temperature of liquid phase, so that it can help melt and improve the pore structure.The effect of widening the firing temperature range is also similar to that of Fe2O3. Al _ 2O _ 3 shows the function of stabilizing foaming and promoting the production of crystalline phase, thus improving the mechanical properties of materials.Foamed ceramics containing a large number of uniform pores can be prepared when the amount of foaming agent in the billet is 0.1 wt%, and the appropriate addition amount is 0.32 ~ 2.0 wt.The excessive addition of foaming agent can lead to the deterioration of the pore structure and properties of the foamed ceramics.Secondly, the relationship between the grinding process and the properties of foamed ceramics was studied.The effects of grinding aids and grinding time on particle size distribution and properties of foamed ceramics were discussed.The experimental results show that the pore structure and properties of foamed ceramics are mainly affected by the influence of grinding aids and grinding time on the mixing uniformity of the billets and the fineness and particle size distribution of the billets.The structure and properties of foamed ceramics prepared by wet grinding process are similar to those of foamed ceramics by adding 0.035% triethanolamine dry grinding process. However, the wet grinding process is complex, high energy consumption and long preparation period, so it can be replaced by adding triethanolamine dry grinding process.Finally, the relationship between the sintering process and the properties of foamed ceramics was studied.The effects of sintering temperature and holding time on the properties of foamed ceramics were analyzed by single factor variable method.The results show that both sintering temperature and holding time have significant effects on the pore structure and compressive strength of foamed ceramics, but have little effect on water absorption.Raising the sintering temperature or prolonging the holding time can increase the consistency of bubble pore size and decrease the apparent density and water absorption, but if the sintering temperature is too high or the holding time is too long, the pore structure will be destroyed.Leads to the formation of connected holes and "hole windows", thus increasing apparent density and water absorption.In addition, the relationship between the properties of foamed ceramics was summarized. The properties of foamed ceramics were mainly affected by the pore structure and apparent density.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ174.1

【參考文獻】

相關期刊論文 前10條

1 段寧;陳浩;李婧;;發(fā)泡陶瓷保溫板應用技術及前景研究[J];江蘇建筑;2013年04期

2 顧小輝;;建筑外墻保溫系統(tǒng)防火性能分析與改進方法[J];山西建筑;2013年24期

3 杜斌;劉福田;張銘霞;李玲;張波;;雙氧水發(fā)泡法制備泡沫陶瓷外墻保溫板[J];山東陶瓷;2013年02期

4 賈海林;余明高;;煤矸石絕熱氧化的失重階段及特征溫度點分析[J];煤炭學報;2011年04期

5 孟慶博;王棟;王學成;;建筑常用保溫材料導熱性能分析[J];建筑節(jié)能;2011年02期

6 艾紅梅;盧普光;;墻體保溫技術的研究與發(fā)展(一)[J];建材技術與應用;2011年01期

7 邵國新;吳志敏;張源;;發(fā)泡陶瓷保溫板外保溫系統(tǒng)建筑應用與質量控制[J];建筑節(jié)能;2010年11期

8 吳志敏;許錦峰;張海遐;張源;;發(fā)泡陶瓷保溫板保溫系統(tǒng)及防火隔離帶建筑應用研究[J];新型建筑材料;2010年10期

9 吳麗娜;黃玉東;王志江;劉麗;;發(fā)泡工藝制備多孔陶瓷研究進展[J];中國陶瓷;2010年03期

10 戴開文;;煤礦開采固體廢棄物對環(huán)境的損壞及治理方法[J];中小企業(yè)管理與科技(下旬刊);2010年01期

相關碩士學位論文 前6條

1 范玲玲;凝灰?guī)r制備發(fā)泡材料研究[D];信陽師范學院;2012年

2 宮正;阜新礦業(yè)集團循環(huán)經濟模式研究[D];遼寧工程技術大學;2009年

3 吳Y，

本文編號：1714174