矿产保护与利用2023，Vol.43Issue(6)：33-40,8.DOI:10.13779/j.cnki.issn1001-0076.2023.06.004
基于高内相W/O乳液的煤气化渣油团聚脱炭研究
Decarbonization of Coal Gasification Slag by Oil Agglomeration Based on High Internal Phase W/O Emulsion
摘要
Abstract
The high carbon content of coal gasification residue and the mutual restriction of carbon ash hinder the resource utilization of coal gasification residue.Therefore,decarbonization is the basis of resource utilization and high value utilization of coal gasification slag.Due to the developed pores on the surface of coal gasification slag,the main decarburization methods,such as flotation and oil agglomeration,have the problems of high drug consumption and low carbon recovery rate.The high internal phase W/O emulsion is an oil-in-water emulsion with the volume of the internal water phase greater than 74.05%.The internal water phase replaces the oil to fill the pores on the surface of the coal gasification slag,which greatly reduces the fuel consumption.The properties of coal gasification slag samples were investigated by industrial analysis,X-ray diffraction(XRD)and scanning electron microscopy(SEM).The effects of surfactants,internal water ratio and inorganic salts on the stability and particle size of high internal W/O emulsions were studied by laser particle size analyzer and optical microscope.Finally,the decarbonization effect of high internal phase W/O emulsion with kerosene,diesel and SPAN80-oil mixture on coal gasification residue agglomeration was compared with the oil saving rate and carbon residue recovery rate.The results show that the fixed carbon content of the sample is 51.94%,and the main gangue minerals are quartz,calcite and anhydrite.The addition of alkali lignin,surfactant,NaCl and MgCl2 can improve the stability of the emulsion.Compared with kerosene,diesel oil and SPAN80-oil mixture,the recovery rate of residual carbon in high internal phase W/O emulsion oil was increased by 14%on average,and the fuel saving rate was over 85%.Among them,the high internal phase W/O emulsion with 85%internal water,25%surfactant and NaCl added has the best decarburization effect,and the recovery rate of carbon residue can reach 91.23%.The results show that high internal phase W/O emulsion oil agglomeration is an effective method to decarbonize coal gasification slag.关键词
煤气化渣/油团聚/高内相W/O乳液/脱炭Key words
coal gasification slag/oil agglomeration/high internal phase W/O emulsion/decarbonization分类
矿业与冶金引用本文复制引用
彭扬,廖寅飞,陈罗建,罗国兰,安茂燕..基于高内相W/O乳液的煤气化渣油团聚脱炭研究[J].矿产保护与利用,2023,43(6):33-40,8.基金项目
江苏省自然科学基金面上项目(BK20221546,BK20211048) （BK20221546,BK20211048）
徐州市科技计划重点研发项目(KC21285) （KC21285）
