Knowledge Management System Of Institute of process engineering,CAS
| Insight into the mechanism of gasification fine slag enhanced flotation with selective dispersion flocculation | |
| Shi, Da1,2; Zhang, Jianbo2; Li, Huiquan2,3; Li, Shaopeng2; He, Fayu4; Qu, Jiangshan2; Chang, Ruiqi2; Zhu, Ganyu2; Yang, Chennian2; Wang, Chenye2 | |
| 2023-03-15 | |
| Source Publication | FUEL
 |
| ISSN | 0016-2361 |
| Volume | 336Pages:9 |
| Abstract | Coal gasification fine slag (CGFS) produced in the coal chemical industry has caused severe environmental pollution and resource waste. To realize the utilization of CGFS, we have to efficiently separate unburned carbon (UC) in CGFS. In this work, based on the discovery of the covering between CGFS particles, the selective dispersion flocculation flotation method is proposed to improve the efficient separation of UC from CGFS. The mechanism of selective dispersion flocculation is revealed through adsorption mode, interaction force between particles, and the particle size distribution of floc under different reagent conditions. Results show that a hy-drophilic layer is formed on the surface of ash particles, which hinders the adsorption of PAM and ash particles due to the chemical adsorption of SHMP with ash particles. However, carbon particles are not affected by SHMP and can be directly adsorbed with PAM. This selective adsorption dominates the interaction force of adsorbed particles, and then controls the agglomeration of particles. After selective dispersion flocculation, the original carbon-ash selective agglomeration state is changed to the carbon-carbon selective agglomeration state. D90 of fine carbon particles changed from 110.21 mu m to 356.84 mu m. Compared with the traditional flotation process, the combustible recovery rate of foam products is increased by 10.4 % and loss on ignition (LOI) is increased by approximately 5 %. This work is conducive to fundamentally understanding the mechanism of selective dispersion flocculation. It is helpful to guide the separation of carbon and ash from gasification slag in industry. |
| Keyword | Gasification slag Flocculation Flotation Unburned carbon Interaction force |
| DOI | 10.1016/j.fuel.2022.127134 |
| Language | 英语 |
| WOS Keyword | COAL ; REDUCTION ; CARBON |
| Funding Project | National Natural Science Foundation of China[52174390] ; National Natural Science Foundation of China[U1810205] ; Strategic Priority Research Program of the Chinese Academy of Sciences China[XDA21040601] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM2022D04] |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| Funding Organization | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences |
| WOS ID | WOS:000906519800001 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/56277 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Zhang, Jianbo; He, Fayu |
| Affiliation | 1.Northeastern Univ, Sch Resources & Civil Engn, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Reso, CAS Key Lab Green Proc & Engn, Beijing 100090, Peoples R China 3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 4.China Minmetals Corp, Beijing 100010, Peoples R China |
| Recommended Citation GB/T 7714 | Shi, Da,Zhang, Jianbo,Li, Huiquan,et al. Insight into the mechanism of gasification fine slag enhanced flotation with selective dispersion flocculation[J]. FUEL,2023,336:9. |
| APA | Shi, Da.,Zhang, Jianbo.,Li, Huiquan.,Li, Shaopeng.,He, Fayu.,...&Wang, Chenye.(2023).Insight into the mechanism of gasification fine slag enhanced flotation with selective dispersion flocculation.FUEL,336,9. |
| MLA | Shi, Da,et al."Insight into the mechanism of gasification fine slag enhanced flotation with selective dispersion flocculation".FUEL 336(2023):9. |
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