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本人毕业在即，由于英语实在是太差了，求高手帮忙改一下英文摘要 跪求各位了 https://d.namipan.com/d/0654ff45 ... 8fa4845a5f3e03d0000 具体内容： 脱硫灰是燃煤和冶金行业烟气脱硫的副产物，任意堆放脱硫灰不仅占用大量土地，还会对环境造成严重的二次污染，而且给生产企业带来很大的经济负担；现代锅炉燃烧均采用磨细的煤粉为燃料，巨大的粉煤灰排放量占用大量耕地，污染环境，危害人们的生存环境，制约国民经济的可持续发展。我国硫资源短缺、铝土矿资源有限，本研究利用脱硫灰和粉煤灰制取硫酸和提取氧化铝，不仅改善了人们的生活环境，而且能回收有用资源，满足工业化需求，缓解资源短缺的现状，达到变废为宝的目的。 本研究的主要内容包括：(1)利用XRD、DSC、SEM、EDS等方法研究脱硫灰的物化特性、矿物组成以及微观形貌；(2)分析脱硫灰制硫酸-粉煤灰提取氧化铝过程的反应热力学，判断化学反应进行的可能性、先后顺序，反应的平衡条件及最终反应产物；(3)探讨焦炭掺量、粉煤灰掺量、煅烧温度等对CaSO4的分解和铝的浸提的影响；(4)确定最佳反应条件。 通过研究可以得出：(1)脱硫灰的主要化学成分是CaSO3、CaSO4、Ca(OH)2和CaCO3，并含有一定量的SiO2和Al2O3等，其主要矿物相为半水亚硫酸钙、二水石膏、方解石、羟钙石，以及少量氯化钙，脱硫灰的颗粒形状不规则，呈碎屑状，粒度变化差异较大；(2)本研究的反应体系复杂，主反应在800°C时开始发生，当达到900°C以上时，随着温度的增加，该反应相对其他副反应更容易发生；(3)还原剂焦炭的加入可以明显促进CaSO4的分解，但其掺入量并不是越多越好，而是有一个临界值，高于此临界值会抑制CaSO4的分解，粉煤灰中的Al2O3和SiO2会与CaSO4分解产生的CaO发生复杂的化学反应，在生成C12A7的同时生成多种含硫副产物，影响CaSO4的分解，粉煤灰掺量高时会降低铝的浸提率，温度越高越有利于CaSO4的分解和铝的浸提，研究中影响因素的顺序为温度＞粉煤灰掺量＞焦炭掺量；(4)在协调CaSO4的分解率和铝的浸提率之间平衡的情况下最佳实验条件为1200°C，C/DF1=0.085，Ash/DF1=0.294。 研究表明，采用脱硫灰制取硫酸-粉煤灰提取氧化铝可以达到较高的CaSO4分解率和铝的浸提率，此方法处理脱硫灰和粉煤灰具有广阔的应用前景。 好心人可以直接联系我 QQ：27988143 [ Last edited by muyaqin on 2010-11-15 at 09:56 ] |
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2楼2010-11-15 11:00:39
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脱硫灰是燃煤和冶金行业烟气脱硫的副产物，任意堆放脱硫灰不仅占用大量土地，还会对环境造成严重的二次污染，而且给生产企业带来很大的经济负担；现代锅炉燃烧均采用磨细的煤粉为燃料，巨大的粉煤灰排放量占用大量耕地，污染环境，危害人们的生存环境，制约国民经济的可持续发展。我国硫资源短缺、铝土矿资源有限，本研究利用脱硫灰和粉煤灰制取硫酸和提取氧化铝，不仅改善了人们的生活环境，而且能回收有用资源，满足工业化需求，缓解资源短缺的现状，达到变废为宝的目的。 Desulfurization ash is by-products produced by flue gas desulfurization in coal-firing and metallurgical industries.Arbitrarily stacked desulfurization ash can occupy much of the land , cause serious secondary pollution, and bring great economic burden for companies.By adopting grinding thin coal as fuel ,modern boilers produce huge fly ash emissions,which not only cause greatly endanger our living environment but also enormously constrain the Sustainable development of national economy.Considering our country is in short of sulphur and bauxite resources,in this paper desulphurization ash and fly ash are used to produce Sulfuric acid and alumina,which not only improved the people's living environment, but also recycle useful resource to satisfy industrialization demand, alleviate resource shortage, and reach reutilization purpose. 先给你翻译一段看看吧,如果还可以的话再翻译其他的. |
3楼2010-11-15 13:19:53
4楼2010-11-15 13:23:13
5楼2010-11-15 14:10:03
| Desulfurization ash is by-products of flue gas desulfurization in coal-combustion and metallurgical industries. Arbitrarily stacking of the ash could result in plentiful of land occupation, serious secondary pollution and economic burden to the companies. With grinding thin coal as fuel, modern boilers produce huge fly ash emissions, which not only threatens our living environment but also limit the sustainable development of national economy. In this paper, desulphurization ash and fly ash are utilized to produce Sulfuric acid and alumina due to the scarce of sulphur and bauxite resources in china. Such approach could either promote the improvement of the people's living environment and alleviate the status of resource shortage, or satisfy industrialization demand and high efficiently utilize resources by recycling of useful resources. |
6楼2010-11-15 14:45:32
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本研究的主要内容包括：(1)利用XRD、DSC、SEM、EDS等方法研究脱硫灰的物化特性、矿物组成以及微观形貌；(2)分析脱硫灰制硫酸-粉煤灰提取氧化铝过程的反应热力学，判断化学反应进行的可能性、先后顺序，反应的平衡条件及最终反应产物；(3)探讨焦炭掺量、粉煤灰掺量、煅烧温度等对CaSO4的分解和铝的浸提的影响；(4)确定最佳反应条件。 This paper is focused on  1) Physical and chemical characteristics,mineral composition and microstructure of the desulfurization ash were studied with methods of XRD、DSC、SEM、EDS etc. (2) The process of producing sulfuric acid and alumina from desulfurization ash and fly ash respectively is studied on the basis of thermodynamics analysis, and the possibility,order,equilibrium condition and final products of the chemical reactions were all studied in this paper.(3) In addition to the mixing amounts of coke and fly ash ,the calcination temperature on the ecomposition of CaSO4 and the leaching of aluminium is also investigated in this paper.(4) The optimum reaction conditions were determined in the end. |
7楼2010-11-15 16:09:00
前两段
muyaqin(金币+5, 翻译EPI+1): 2010-11-15 16:47:15
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Desulfurization ash is by-products produced by flue gas desulfurization in coal-firing and metallurgical industries.Arbitrarily stacked desulfurization ash can occupy much of the land , cause serious secondary pollution, and bring great economic burden for companies.By adopting grinding thin coal as fuel ,modern boilers produce huge fly ash emissions,which not only greatly endanger our living environment but also enormously constrain the Sustainable development of national economy.Considering our country is in short of sulphur and bauxite resources,in this paper desulphurization ash and fly ash are used to produce Sulfuric acid and alumina,which not only improved the people's living environment, but also recycle useful resource to satisfy industrialization demand, alleviate resource shortage, and reach reutilization purpose. This paper is focused on 1) Physical and chemical characteristics,mineral composition and microstructure of the desulfurization ash were studied with methods of XRD、DSC、SEM、EDS etc. (2) The process of producing sulfuric acid and alumina from desulfurization ash and fly ash respectively is studied on the basis of thermodynamics analysis, and the possibility,order,equilibrium condition and final products of the chemical reactions were all studied in this paper.(3) In addition to the mixing amounts of coke and fly ash ,the calcination temperature on the ecomposition of CaSO4 and the leaching of aluminium is also investigated in this paper.(4) The optimum reaction conditions were determined in the end. |
8楼2010-11-15 16:11:10
米有办法呀9楼2010-11-15 16:40:37
我是新手啦，米有那么多金币啦10楼2010-11-15 16:43:20
11楼2010-11-15 16:45:31
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通过研究可以得出：(1)脱硫灰的主要化学成分是CaSO3、CaSO4、Ca(OH)2和CaCO3，并含有一定量的SiO2和Al2O3等，其主要矿物相为半水亚硫酸钙、二水石膏、方解石、羟钙石，以及少量氯化钙，脱硫灰的颗粒形状不规则，呈碎屑状，粒度变化差异较大；(2)本研究的反应体系复杂，主反应在800°C时开始发生，当达到900°C以上时，随着温度的增加，该反应相对其他副反应更容易发生；(3)还原剂焦炭的加入可以明显促进CaSO4的分解，但其掺入量并不是越多越好，而是有一个临界值，高于此临界值会抑制CaSO4的分解，粉煤灰中的Al2O3和SiO2会与CaSO4分解产生的CaO发生复杂的化学反应，在生成C12A7的同时生成多种含硫副产物，影响CaSO4的分解，粉煤灰掺量高时会降低铝的浸提率，温度越高越有利于CaSO4的分解和铝的浸提，研究中影响因素的顺序为温度＞粉煤灰掺量＞焦炭掺量；(4)在协调CaSO4的分解率和铝的浸提率之间平衡的情况下最佳实验条件为1200°C，C/DF1=0.085，Ash/DF1=0.294。 Four conclusions can be drawn from this study: (1)With a certain quantity of SiO2 and Al2O3,the main chemical compositions of the desulfurization ash include CaSO3,CaSO4,Ca(OH)2 and CaCO3 etc.Half water calcium sulfate,dehydrate gypsum,calcite and portlandite are the main mineral phases in the the desulfurization ash,and some calcium chloride is also found in the system.The grains in the desulfurization ash occur as clastic particles,with irregular particle shapes and different particle sizes .(2) The reaction system studied in this paper possess great complexity due to the appearance of some side reactions.The main reaction is triggered at 800°C,and with the rise of temperature the main reaction is more and more likely to occur.when the temperature rise to 900°C,compared with other side reactions the main reaction is more likely to occur and become the dominant reaction.(3)With the resistant coke adding to the system,the decomposition of CaSO4 is apparently accelerated,while there is a optimal amount of coke when the mixing amounts exceed the optimal amount it will bring the opposite effect.The Al2O3 and SiO2 react with the CaO from the decomposition of CaSO4 and trigger complicated reaction,producing C12A7 and other sulfur-containing by-products,which affect the decomposition of CaSO4 .High fly ash content will lower the producing of aluminium,while the rising of the temperature the is good for the decomposition of CaSO4 and the producing of aluminium.According to the importance of each influencing factor,the can be ordered as follows:temperature>fly ash content>coke content.(4)Considering the decomposition of CaSO4 and the producing of aluminium,the optimum conditions of the system is established as follows :1200°C,C/DF1=0.085，Ash/DF1=0.294. 研究表明，采用脱硫灰制取硫酸-粉煤灰提取氧化铝可以达到较高的CaSO4分解率和铝的浸提率，此方法处理脱硫灰和粉煤灰具有广阔的应用前景。 The study in this paper shows that using desulphurization ash and fly ash to produce alumina can accomplish high decomposition rate of CaSO4 and extraction rate of aluminium,which reflect its vast application prospects in the disposition of desulphurization ash and fly ash. |
12楼2010-11-16 15:45:22
13楼2010-11-16 16:25:17
