本文關鍵詞： 改性石灰石 CO2捕集 循環(huán)煅燒 性能測定 鎂鈣耐火材料　出處：《西安建筑科技大學》2015年碩士論文　論文類型：學位論文

【摘要】：本論文主要是研究利用添加了氧化鎂(Mg O等)的石灰石(產地:陜西富平)(粒度40μm)對工業(yè)CO2廢氣的循環(huán)捕集以及利用煅燒石灰石廢料來制備高鈣基鎂鈣耐火材料。本課題的創(chuàng)新點在于利用經過多次循環(huán)煅燒/碳酸化試驗的石灰石廢料與一定比例Mg O以及粘結劑相復合來制備鎂鈣基耐火材料,并對其性能進行了表征。論文第一部分主要是研究改性后的石灰石(采用Mg O改性)在多次循環(huán)煅燒/碳酸化過程中對CO2的捕集能力。因為改性石灰石顆粒在經過多次高溫循環(huán)煅燒后表面會發(fā)生嚴重的燒結現象,從SEM照片中可以清楚的看到這一變化過程,所以利用這種材料制作鎂鈣基耐火材料具有一定的研究價值,并且在理論上也可以提高鎂鈣基耐火材料的抗水化性能,并可充分利用CO2循環(huán)捕集所產生的煅燒石灰石廢料。研究課題主要從三個方面進行:1、利用金屬氧化物來對鈣基材料進行改性,并完成其堆積態(tài)下對CO2捕集性能研究;2、選取改性效果較好的金屬氧化物以及配比來完成鈣基材料對CO2捕集的放大試驗(即半懸浮態(tài)試驗),與此同時,可以產出公斤級煅燒石灰石廢料;3、利用上述試驗產生的廢料制作鎂鈣基耐火材料并研究其性能。試驗結論如下:1:在利用不同金屬氧化物(Mg O/Si O2/Fe2O3)改性鈣基吸收劑堆積態(tài)實驗過程中,研究發(fā)現:經過十幾次循環(huán)煅燒/碳酸化試驗后,利用Mg O(摻量為1%)改性的鈣基材料對CO2的捕集性能優(yōu)于其他金屬氧化物;同時,石灰石顆粒表面發(fā)生嚴重的燒結。2:選取Mg O(摻量為1%)修飾的鈣基材料進行半懸浮態(tài)試驗,并將經過一次煅燒之后的改性石灰石分成兩份做對比試驗,一份進行水化處理后進行對比試驗,另一份不做任何處理。在高溫回轉爐中完成100次循環(huán)煅燒之后,我們發(fā)現經過水化改性的鈣基材料的表面燒結情況比未經處理過的材料更為明顯。3:將上述試驗產出的兩種廢料分別按照如下比例制作成耐火材料:分別按55.12wt%、44.88wt%添加Mg O,同時按52.1%、42.9%、5%的比例添加不同種類有機粘結劑,制備鎂鈣耐火材料,最終發(fā)現利用酚醛樹脂作為有機粘結劑時耐火材料的抗水化性能、微觀形貌分析以及抗壓強度都相對突出。
[Abstract]:In this paper, the circulating capture of industrial CO2 waste gas by adding MgO, MgO, etc. (from Fuping, Shaanxi Province, 40 渭 m) and the preparation of magnesia-calcium refractories with high calcium base by calcined limestone waste materials are studied in this paper. The innovation of this project lies in the preparation of magnesia-calcium-based refractories by using limestone waste after repeated cycle calcinations / carbonation tests combined with a certain proportion of MgO and binder. The first part of this paper is mainly about the trapping ability of modified limestone (modified with MgO) to CO2 during repeated cycle calcination / carbonation. After repeated high temperature cycle calcination, serious sintering will occur on the surface. The process of this change can be clearly seen from the SEM photos, so the use of this material to make magnesia-calcium based refractories has certain research value, and in theory can also improve the hydration resistance of magnesia-calcium based refractories. And it can make full use of calcined limestone waste produced by CO2 cycle capture. The research topic is mainly from three aspects: 1, using metal oxides to modify calcium based materials, The trapping performance of CO2 was studied under the stacking state. The metal oxides and the ratio of the modified metal oxides were selected to complete the scale-up test of CO2 trapping by calcium based materials (that is, semi-suspended state test), and at the same time, Calcined limestone wastes of kg / kg can be produced to produce magnesium-calcium based refractories and their properties are studied. The test results are as follows: the calcium based absorbent reactor is modified by using different metal oxides (MgO / Sio _ 2 / Fe _ 2O _ 3). In the process of product state experiment, It is found that after more than ten cycles of cyclic calcinations / carbonation tests, the trapping performance of CO2 modified with MgO (1%) is superior to that of other metal oxides. Serious sintering occurred on the surface of limestone particles. The calcium based material modified by mg O (mg O = 1) was selected for semi-suspension test, and the modified limestone after one calcination was divided into two parts for comparative test. One is treated by hydration and the other is treated without any treatment. After 100 cycles of calcinations are completed in a high temperature rotary furnace, We found that the surface sintering of the hydrated calcium based material was more obvious than that of the untreated material. The two kinds of wastes produced by the above test were made into refractories in the following proportion: 55.12 wtt% 44.88 wt% respectively. Mg O, at the same time adding different kinds of organic binders in the proportion of 52.1% to 42.9%, Finally, it was found that the hydration resistance, micro-morphology analysis and compressive strength of the refractories with phenolic resin as organic binder were relatively outstanding.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ175.7

【參考文獻】

相關期刊論文 前6條

1 劉宏文;夏秀麗;;淺析溫室效應及控制對策[J];中國環(huán)境管理干部學院學報;2008年03期

2 魏明坤,曾利紅,劉麗君;鎂鈣系耐火材料的研究進展[J];材料與冶金學報;2005年03期

3 夏霞云,王杰曾;水泥窯用白云石磚損毀機理的研究[J];中國建材科技;1999年02期

4 裴克毅,孫紹增,黃麗坤;全球變暖與二氧化碳減排[J];節(jié)能技術;2005年03期

5 羅明,李楠,鄭海忠,邱文冬;外加劑對白云石燒結及抗水化性的影響[J];耐火材料;2001年01期

6 梁義兵;李運平;;鎂鈣磚的抗渣性研究[J];耐火材料;2009年04期

相關博士學位論文 前1條

1 李勝;CO_2捕集能耗最小化機理及煤制天然氣動力多聯產系統(tǒng)[D];中國科學院研究生院（工程熱物理研究所）;2012年

相關碩士學位論文 前4條

1 劉保林;近零排放煤利用關鍵技術與系統(tǒng)集成研究[D];北京交通大學;2007年

2 張佳麗;基于STIRPAT模型的我國二氧化碳排放研究[D];湖南大學;2011年

3 吳昊;鈣基吸收劑循環(huán)煅燒/碳酸化捕集CO_2研究[D];南京師范大學;2013年

4 秦利光;MDEA-PZ-CO_2體系溶解度和粘度的理論研究[D];華北電力大學;2014年

，

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