煤粉燃烧过程中铝硅矿物重构与转型规律研究.pptx

下载文档 降价啦

3
0
约 22页
2016-12-08 发布于湖北
举报
版权申诉
保障服务

煤粉燃烧过程中铝硅矿物重构与转型规律研究.pptx

1、本文档共22页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。

A Research On The Reconstruction And Transformation Of Aluminum-Silicate Minerals During Pulverized Coal CombustionDuan XingyuMain Content1 . Coal Sample Analysis2 . High Temperature?Combustion3 . Leaching Experiments4 . Reconstruction And Transformation1.1 Coal-sample Analysis Endothermic PeaksFig 1 XRD and DSC-TGA of coal sample Tab 1 the chemical component of coal sample OxideSiO2Al2O3SO3Fe2O3CaOTiO2SrOP2O5K2OContent/%10.139.513.972.210.570.580.210.330.101.2 Low Temperature at 815℃ Fig 2 XRD and TG-DSC of coal sample at 815℃Tab 2 the chemical component of coal sample OxideSiO2Al2O3Fe2O3SO3TiO2CaONa2OP2O5MgOContent/%46.2442.546.051.350.880.840.660.340.161.3 Results and Discussion The main minerals in coal are kaolinite、pyrite、tridymite、calcite. And they will change during low temperature combustion.About 500℃Al4(Si4O10)OH8Al2O3·2SiO2（Dehydration Reaction）…FeS Fe1-xS Fe3O4 Fe2O3 …CaCO3 CaO …SiO2 Glass?Phase …Decompose Oxidation OxidationDecompose （Above 300℃）2.1 Temperature at 1000℃ 1000℃ 10min1000℃ 30min1000℃ 120minAl4(Si4O10)OH8→2(Al2O3·2SiO2)+4H2OAl2O3·2SiO2→3Al2O3·2SiO2+SiO2Al2O3·2SiO2→Al2O3+SiO2Al2O3→γ-Al2O3γ-Al2O3+SiO2 →3Al2O3·2SiO22.2 Temperature at 1100℃ 1100℃ 10min1100℃ 30min1100℃ 120minSiO2(Noncrystalline) SiO2(Cristobalite)2.3 Temperature at 1200℃ 1200℃ 30min1200℃ 10min1200℃ 120minFe2O3？2.4 Results and Discussion 1200℃3Al2O3·2SiO2 、SiO2 1100℃3Al2O3·2SiO2 、 Fe2O3 、SiO21000℃3Al2O3·2SiO2 、 Fe2O3Amorphous Glass?PhaseIncreasing TemperatureRiseReduceThe final stable phases are mullite，cristobalite and amorphous glass?phase 3.1 Leaching Experiments Experimental Procedure Leaching ConditionLeaching Temperature：130℃Leaching Time：10minThe?Ration?Of Liquid?To?Solid：20:1Coal Sample：5gDeionized Water：100mlNaOH：150g/LSteel Ball：4 and 4 Suction Filtration With Hot Deionized Water Baking DryWeight、Analysis3.2 Leaching Results At 1000℃ T/minWeight/gSiO2/%Al2O3/%A/S SiO2%Al2O3%103.3427.1652.55 1.9361.10 17.51 203.33 27.7851.531.8560.35 19.