【摘要】：本文主要針對生料中的礦物種類和顆粒度兩個因素對生料的易燒性和熟料巖相結(jié)構(gòu)的相關(guān)性進(jìn)行研究。試驗(yàn)是在相同率值條件下,通過制備含有不同礦物組成、不同粒徑的礦物的生料,在1350℃和140℃下煅燒熟料。采用化學(xué)分析、激光粒度分析、X射線衍射法、巖相分析等方法分別測試原料的化學(xué)組成、生料的粒度、熟料的游離氧化鈣含量和熟料的巖相結(jié)構(gòu),研究了生料中高嶺石和蒙脫石相互取代條件下生料的易燒性和巖相結(jié)構(gòu)特征進(jìn)行了對比研究,并對生料中粗顆粒的石英和方解石礦物及其熟料變化對s生料易燒性和巖相結(jié)構(gòu)的影響進(jìn)行了研究分析。實(shí)驗(yàn)研究結(jié)果表明： 1)對于硅質(zhì)原料中的主要礦物,高嶺石、蒙脫石等粘土礦物相對于石英,具有較好的易燒性,取代生料中的石英越多,對改善生料的易燒性越有利。如1400℃下,含有高嶺石和蒙脫石等粘土礦物的生料煅燒所得的熟料中的游離氧化鈣含量低于0.60%。,而采用粒徑小于80μm石英和粒徑小于45μm的α—Al2O3配料的熟料中的游離氧化鈣含量為1.96%。 2)同樣率值條件下,在摻入相同比例的粗顆粒石英(為了消除率值和其余礦物顆粒尺寸的影響,配料中差額部分的石英粒徑小于45μm時,與蒙脫石配料的生料煅燒所得的熟料相比,高嶺石配料的生料煅燒所得的熟料的游離氧化鈣較少,氣孔率較小,燒結(jié)密度相對較大,大約大30%。 3)相同粒度條件下,石英的對生料易燒性的影響明顯大于方解石的影響。如：80μm方解石篩余量增加1%,游離氧化鈣含量就增加0.04-0.06%。而80μm石英篩余量增加1%,游離氧化鈣含量就增加0.34%-1.90%,是方解石的8-30倍。200μm方解石篩余量增加0.5%,游離氧化鈣含量就增加0.19～0.55%。而200μm石英篩余量每增加0.5%,游離氧化鈣含量就增加0.31%-1.66%,是方解石的2～3倍。粗顆粒方解石和石英均能引起游離氧化鈣的產(chǎn)生,但在巖相上的形式不同。方解石主要引起游離氧化鈣礦巢,礦巢尺寸與方解石粒徑相比略��；石英主要形成環(huán)狀分布的B礦巢,導(dǎo)致生料局部飽和比過高而形成分散在A礦間的分散式游離氧化鈣。 4)對實(shí)際生產(chǎn)的生料的煅燒研究結(jié)果表明：當(dāng)生料中含有較多的高嶺土?xí)r,對應(yīng)需要摻入更多的高硅砂巖才能配制出符合硅率要求的生料。高硅砂巖中的石英難以粉磨,生料中含有較多的石英粗顆粒,導(dǎo)致含石英礦物較多、且粒度較粗的這一類生料煅燒所得的熟料,其游離氧化鈣含量較多,在巖相上可以觀察到尺寸較大的環(huán)狀分布的B礦巢和游離氧化鈣礦巢。粗顆粒少且石英含量少的生料,煅燒所得的熟料中的游離氧化鈣含量較少,在巖相上觀察到少量的環(huán)狀分布的B礦巢。 5)在對實(shí)際生產(chǎn)生料進(jìn)行再次粉磨,使得生料中粗顆粒的尺寸得以減小后,煅燒所得的熟料的游離氧化鈣含量大幅下降,下降幅度為3-7%,另外,環(huán)狀分布的B礦和游離氧化鈣礦巢數(shù)目和尺寸明顯下降,熟料中礦物分布更均勻。生料80μm篩余降低到11-13%時,1350℃下煅燒所得的熟料的游離氧化鈣含量比80μm篩余為14～15%的生料在1400℃下煅燒所得的熟料的游離氧化鈣含量要低,說明實(shí)際生料中顆粒尺寸對熟料中的游離氧化鈣和巖相結(jié)構(gòu)產(chǎn)生的影響要大于煅燒溫度的影響。
[Abstract]:In this paper, the relationship between the burnability of raw meal and the clinker lithofacies structure is studied. Under the same rate, the clinker is calcined at 1350 C and 140 C by preparing raw meal with different mineral composition and different particle size. Degree analysis, X-ray diffraction and lithofacies analysis were used to measure the chemical composition of raw materials, the grain size of raw materials, the content of free calcium oxide in clinker and the lithofacies structure of clinker. The burnability and lithofacies structure characteristics of raw materials were studied under the condition of replacement of kaolinite and montmorillonite in raw materials. The effects of quartz and calcite minerals and clinker on the burnability and lithofacies structure of s raw meal were studied.
1) For the main minerals in siliceous raw materials, clay minerals such as kaolinite and montmorillonite have better burnability than quartz. The more quartz in raw meal is replaced, the more favorable it is to improve the burnability of raw meal. For example, the content of free calcium oxide in clinker calcined by raw meal containing clay minerals such as kaolinite and montmorillonite is lower at 1400 ~C. The content of free calcium oxide in the clinker containing quartz with diameter less than 80 micron and a-Al2O3 with diameter less than 45 micron is 1.96%.
2) At the same rate, when the quartz particle size of the difference part of the mixture is less than 45 micron, the free calcium oxide of the clinker is less than that of the clinker calcined with montmorillonite raw meal, and the free calcium oxide of the clinker calcined with kaolinite raw meal is less than that of the clinker calcined with Montmorillonite raw meal. The porosity is relatively small, and the sintering density is relatively large, about 30%..
3) Under the same particle size, the influence of quartz on the burnability of raw meal is obviously greater than that of calcite. For example, the excess of 80-micron calcite sieve increases by 1%, the content of free calcium oxide increases by 0.04-0.06%, while the excess of 80-micron quartz sieve increases by 1%, the content of free calcium oxide increases by 0.34% -1.90%, which is 8-30 times of that of calcite. The content of free calcium oxide increases by 0.19-0.55% with 5% and 0.31-1.66% with each 0.5% increase in the residual of 200 micron quartz sieve, which is 2-3 times that of calcite. Both coarse-grained calcite and quartz can cause the formation of free calcium oxide, but in different petrographic forms. The grain size of quartz is a little smaller than that of calcite, and quartz mainly forms circular B-nest, which leads to high local saturation ratio of raw meal and the formation of dispersed free calcium oxide dispersed between A-ore.
4) The results of calcination of raw meal show that when raw meal contains more kaolin, more high-silica sandstone is needed to prepare raw meal which meets the requirement of silica ratio. The clinker calcined with this kind of raw meal has more free calcium oxide content, and larger circular distribution B ore nest and free calcium oxide ore nest can be observed in the lithofacies. Raw meal with less coarse particles and less quartz content has less free calcium oxide content in the clinker calcined, and a small amount of circular distribution can be observed in the lithofacies. The B mine nest.
5) After grinding raw meal again, the size of coarse particles in raw meal was reduced, the content of free calcium oxide in clinker decreased by 3-7%. In addition, the number and size of B ore and free calcium oxide nest in ring distribution decreased obviously, and the distribution of minerals in clinker was more uniform. When it is reduced to 11-13%, the free calcium oxide content of the clinker calcined at 1350 C is lower than that of the clinker calcined at 1400 C with 80_ m sieve and 14-15% raw meal. It shows that the influence of particle size on the free calcium oxide and rock structure in the clinker is greater than that of calcination temperature.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TQ172.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馬先偉,陳胡星;摻雜對高鈣生料易燒性的影響[J];材料科學(xué)與工程學(xué)報;2003年06期

2 徐寧;丁奇生;;我國水泥生產(chǎn)主要工藝與裝備的技術(shù)進(jìn)步[J];硅酸鹽通報;2005年05期

3 László SAS ,趙世璽;石英和石灰石顆粒對生料、熟料及水泥性能的影響[J];國外建材科技;1999年04期

4 王春芳;周宗輝;劉彩霞;程新;;含MgO的硅酸鹽水泥熟料的形成動力學(xué)(英文)[J];硅酸鹽學(xué)報;2011年04期

5 李建梅;李國棟;蔡超;;中國水泥工業(yè)發(fā)展現(xiàn)狀及未來趨勢[J];廣州化工;2013年17期

6 張晶晶;齊硯勇;溫馨;;煅燒溫度對水泥熟料主要礦物形成的影響[J];硅酸鹽通報;2013年09期

7 張惠敏;楊建寧;李曉紅;;不同煅燒制度下硅酸鹽水泥熟料顯微結(jié)構(gòu)的研究[J];河北工業(yè)科技;2009年05期

8 趙介山,曾重慶,顧惠元;水泥生料易燒性的實(shí)驗(yàn)研究與評價[J];中國建材科技;1999年04期

9 王靈秀;王雅明;郝慶軍;袁秀霞;丁新淼;孔凡成;;水泥行業(yè)熟料生產(chǎn)CO_2排放調(diào)查研究[J];中國建材科技;2010年S2期

10 蘆令超;王輝;王守德;郭向陽;;MgO對貝利特-硫鋁酸鋇鈣水泥煅燒和性能的影響[J];建筑材料學(xué)報;2010年03期

，

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