准东煤矿物分布及其熔融特性变化规律分析

doi:10.11799/ce201603040

煤炭工程 ›› 2016, Vol. 48 ›› Issue (3): 130-132.doi: 10.11799/ce201603040

准东煤矿物分布及其熔融特性变化规律分析

谷红伟

神华销售集团有限公司

收稿日期:2015-11-09 修回日期:2015-11-28 出版日期:2016-03-10 发布日期:2016-04-08
通讯作者: 谷红伟 E-mail:guhw@shenhua.cc

Analysis of mineral distribution and corresponding melting characteristic in ZhunDong coal

Received:2015-11-09 Revised:2015-11-28 Online:2016-03-10 Published:2016-04-08

摘要/Abstract

摘要： 对准东煤进行浮沉试验，通过煤灰化学组成和煤灰熔融性分析探讨了矿物在不同密度级中的分布及熔融特性变化。结果表明，不同矿物因成分、密度等差异向不同密度级富集，煤灰化学成分分析显示高密度级比重液富集样品灰化后的Al2O3、SiO2与Fe2O3含量较高，低密度级富集样品灰化后CaO、SO3与MgO含量较高，而TiO2与K2O+Na2O在各密度级样品灰分中的含量较为稳定。Al2O3、SiO2高温下生成莫来石(3Al2O3·2SiO2)使准东煤灰熔融性温度随密度级呈现升高的趋势。1.5～1.8kg/L密度级富集样品因较低的SiO2和较高的Fe2O3，还原气氛中生成硬绿泥石、铁斜晖石、铁橄榄石等低熔点化合物，煤灰熔融性温度较低。碱酸比、硅比、氧化钠含量、硫分结渣指数等指标表明，准东煤中矿物质经浮沉试验分级偏析后，沾污与结渣特性减弱。

关键词: 准东煤, 灰成分, 密度偏析, 熔融特性

Abstract: In this paper, float-sink test for ZhunDong coal was studied. Then the ash chemical compositions and melting characteristics are analyzed to explore the segregation of minerals in ZhunDong coal in different density degree. The research results show that because of different formation, density, etc of minerals in ZhunDong coal, the contents of SiO2, Al2O3 and Fe2O3 of coal ash chemical composition assemble to the high level density degree samples. The contents ofCaO, MgO and SO3gather to lower density degrees. And the contents of TiO2 and K2O+Na2O are stable. The mullite (3Al2O3.2SiO2)generated from Al2O3 and SiO2 under high temperature is the main reason that ash fusion temperature of ZhunDong coal showed a rising trend with density increased. Due to generation of low melting point compounds, such as Al2O3.SiO2.Fe2O3, FeO.SiO2 and 2FeO.SiO2 in reducing atmosphere because of the low SiO2 and high Fe2O3, the coal ash melting temperature of enrichment samples from of 1.5-1.8 density degree is low.In addition, the slagging indices, such as acid to alkali, silicon value, sodium oxide content and sulfur content, indicates that the ZhunDong coal showed lower fouling and slagging characteristicsafter flotation segregation of minerals.

中图分类号:

TQ533

谷红伟. 准东煤矿物分布及其熔融特性变化规律分析[J]. 煤炭工程, 2016, 48(3): 130-132.

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准东煤矿物分布及其熔融特性变化规律分析

Analysis of mineral distribution and corresponding melting characteristic in ZhunDong coal

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