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| Selection of Pelletizing Agglomerant for Germanium-Bearing Coal Dust |
| Received:September 13, 2017 Revised:September 20, 2017 |
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| DOI：10.3969/j.issn.1007-7545.2018.03.009 |
| KeyWord:germanium-bearing coal dust; agglomerant; pelletizing; bentonite |
| Author | Institution |
| jinmingya |
广东省稀有金属研究所 |
| caohongyang |
广东省稀有金属研究所 |
| chenshaochun |
广州有色金属研究院 |
| liuzhiqiang |
广东省稀有金属研究所 |
| ZHU Wei |
广东省稀有金属研究所 |
| gaoyuan |
广东省稀有金属研究所 |
| zhangkuifang |
广东省稀有金属研究所 |
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| Abstract: |
| Effects of bentonite, starch, carboxymethyl cellulose, sodium silicate, water glass, calcium oxide and acrylamide on strength of primary coal dust pellets were investigated. The results show that starch, calcium oxide and acrylamide can not improve pellet strength. Though effectively improving pellet strength, carboxymethyl cellulose will oxygenolysis during roasting, and ball turns into powder. When applying solid sodium silicate and liquid water glass as binder, pellet can obtain required strength with mass ratio of binder to coal ash of 1︰1, but will melt with extreme high temperature and too much binder, exerting a certain impact on germanium volatilization rate. Pellets have good strength and germanium volatilization rate is 99% above when applying bentonite as binder with mass addition of 16% of dust. Bentonite is selected as binder. |
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