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| Study on Reduction Roasting of Zinc-Smelting-Sludge in Rotary Kiln and Dust Recycling |
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Received:October 30, 2016
Revised:November 02, 2016
Accepted:November 03, 2016
Published Online:January 22, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2017.02.003 |
| KeyWord:rotary kiln; wastewater treated sludge; zinc oxide dust; Toxicity Characteristic Leaching Procedure (TCLP) |
| Author | Institution |
| Zhao Yang |
云南省固体废物管理中心 |
| Xing Jie |
云南省固体废物管理中心 |
| An Junjing |
云南省固体废物管理中心 |
| Sun Keyuan |
云南省固体废物管理中心 |
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| Abstract: |
| Rotary kiln with processing capacity of 100 t/d was designed to recover zinc oxide from wastewater treated sludge of zinc smelting by reduction roasting. The results show that zinc grade of sludge has obvious effect on zinc volatilization result in rotary kiln. With zinc grade in sludge of 5.04% and 8.34% respectively, zinc content of zinc oxide dust in cooling system is 19.4% and 21.4% respectively, and zinc content of zinc oxide dust in baghouse system is 50.2% and 51.6% respectively. Concentrations of heavy metals in lixivium of water-quenched slag are all lower than the limiting value of GB5085.3-2007. Water-quenched slag can be used for production or stockpiled. |
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