本文選題：程潮鐵尾礦　切入點：輔助成孔劑　出處：《景德鎮(zhèn)陶瓷學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：尾礦是選礦分選后的產(chǎn)物之一,是選礦廠對原礦經(jīng)過一定的選別工藝流程,選取目標“有用成分”后排放的固體廢料,是目前工業(yè)固體廢棄物的主要組成部分。大量尾礦的堆積給社會及環(huán)境均帶來了巨大的壓力。本課題利用鐵尾礦制備泡沫陶瓷材料,通過對程潮鐵尾礦基本性質(zhì)的檢測與分析,結(jié)合目前泡沫陶瓷材料制備的相關(guān)理論,研究了程潮鐵尾礦制備泡沫陶瓷材料的可行性,并對不同輔助發(fā)泡劑的成孔機理及其含量與泡沫陶瓷孔結(jié)構(gòu)的關(guān)系進行了分析；系統(tǒng)地研究了組成及工藝與鐵尾礦基泡沫陶瓷材料性能的關(guān)系,通過優(yōu)化配方及工藝參數(shù),制備出不同性能,滿足不同要求的泡沫陶瓷材料。論文的主要研究結(jié)果如下：(1)程潮鐵尾-200目顆粒約占70%,為細粒級尾礦,主要化學(xué)成份與建筑陶瓷材料化學(xué)成份基本相同,無需選礦,可整體應(yīng)用于泡沫陶瓷材料配料中。尾礦中含一定量高溫下釋放氣體的物質(zhì),具備制備泡沫陶瓷材料的物質(zhì)條件。但程潮鐵尾礦燒結(jié)范圍較窄,高溫易變形,單獨使用時,難于制備出孔結(jié)構(gòu)均勻、外形規(guī)整的泡沫陶瓷材料。(2)調(diào)整配方組成及工藝參數(shù),可以制備出不同性能的泡沫陶瓷材料。配方中,玻璃粉含量應(yīng)低于30%,程潮鐵尾礦含量宜控制在70%以內(nèi)。所得泡沫陶瓷的孔與孔是不相通的,為典型的閉孔結(jié)構(gòu)。(3)玻璃粉和碳化硅是尾礦基泡沫陶瓷材料的重要輔助成孔劑,兩者同時引入,可獲得理想孔結(jié)構(gòu)的尾礦基泡沫陶瓷材料。玻璃粉在燒結(jié)過程中形成液相,包裹住尾礦中釋放出的氣體,形成包裹性氣泡,是泡沫材料形成孔結(jié)構(gòu)的必要條件；碳化硅高溫氧化釋放氣體,為泡沫體提供寬溫度范圍內(nèi)均勻穩(wěn)定的氣源,是形成均勻孔結(jié)構(gòu)的泡沫陶瓷材料的充要條件。(4)采用粉料松裝布料,無需成型,燒成得到塊狀泡沫陶瓷材料,易切割加工成泡沫陶瓷板、磚等形狀的制品。(5)實驗制備輕質(zhì)多孔磚的配方為：程潮鐵尾礦50%、石英10%、高嶺土15%、玻璃粉25%、外加0.1%碳化硅,燒成溫度1160℃。所得試樣的抗折強度為18MPa,容重為1.4g/cm3。符合JC/T 1095-2009標準。實驗制備的隔熱保溫板的配方為：程潮鐵尾礦60%、石英10%、高嶺10%、玻璃粉20%、外加0.4%碳化硅,燒成溫度1180℃,所得試樣的抗折強度為9MPa,導(dǎo)熱系數(shù)0.05W/m.k(38℃)。符合JG/T 042-2011標準。
[Abstract]:Tailings are one of the products of mineral separation, which is the solid waste discharged by the concentrator after selecting the target "useful components" after a certain separation process for the raw ore. It is the main component of industrial solid waste at present. The accumulation of a large amount of tailings brings great pressure to society and environment. In this paper, foam ceramic materials are prepared from iron tailings, and the basic properties of Cheng Chao iron tailings are tested and analyzed. The feasibility of preparing foam ceramic materials by Cheng Chao iron tailings was studied based on the theory of foam ceramic material preparation at present. The relationship between the pore forming mechanism of different auxiliary foaming agents and the pore structure of foam ceramics was analyzed. The relationship between the composition and process and the properties of iron tailings based foam ceramic materials was systematically studied. Different properties were prepared by optimizing the formula and process parameters. The main research results of this paper are as follows: Cheng Chao Tail-200 mesh particles account for about 70%, which are fine tailing, and the main chemical composition is basically the same as that of building ceramic materials, so there is no need for ore dressing. The tailings contain a certain amount of gas released at high temperature and have the material conditions to prepare foam ceramic materials. However, the sintering range of Chengchao iron tailings is narrow, and it is easy to deform at high temperature, so it can be used alone. It is difficult to prepare foam ceramic material with uniform pore structure and regular shape.) adjusting the composition and technological parameters of the formula, the foam ceramic material with different properties can be prepared. The content of glass powder should be lower than 30%, and the content of Cheng Chao iron tailings should be controlled within 70%. The pores and pores of the obtained foam ceramics are not related to each other, which is a typical closed pore structure.) Glass powder and silicon carbide are important auxiliary pore-forming agents for tailings based foam ceramic materials. Glass powder forms liquid phase during sintering process, which encapsulates the gas released from tailings and forms encapsulated bubbles, which is a necessary condition for the formation of pore structure of foamed materials. Silicon carbide oxidizes and releases gas at high temperature, which provides a uniform and stable gas source for foam body in a wide range of temperatures. It is a necessary and sufficient condition for the formation of foam ceramic materials with uniform pore structure. The formula for the preparation of light porous brick is: Cheng Chao iron tailings 50, quartz 10, kaolin 15, glass powder 25, and silicon carbide 0.1%. The bending strength of the sample was 18 MPA and the bulk density was 1.4 g / cm ~ 3. The heat insulation board was prepared according to JC/T 1095-2009 standard. The formula of the thermal insulation board was: Cheng Chao iron tailings 60, quartz 1010, kaoling 1010, glass powder 20, and 0.4% sic added, firing temperature 1180 鈩，

本文編號：1627915