Removal of chloride from EAF-dust by reactive roasting at low temperature

Wei Sheng Chen, Wei Shan Chou, Chia Cheng Wu, Min Shing Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In Taiwan, nearly 170,000 tons of filter dust from electric arc furnace steel plant (EAFD) is yielded yearly. The most widely used technology for the recovery of zinc oxide from EAF dust is Waelz Process. In comparison with the other countries, the high chloride content in EAF dust in Taiwan, however, leads to the low price of crude zinc oxide, the secondary air pollution and also the high temperature corrosion inside treatment plant. It was reported in literature that the removal of chloride from EAF dust can be achieved by mean of high temperature sintering. Due to the high chloride content, sintering also leads to the loss of zinc through the evaporation of zinc chloride. In order to prevent the loss of zinc and increase the value of zinc oxide product, the main purpose of this research was the investigation of chloride removal by roasting at low temperature under various atmospheric conditions. The influences of reactive gases such as CO2 and SO2, temperature and roasting time were investigated. As conclusion, the new direction for chloride removal is suggested.

Original languageEnglish
Title of host publication100th Annual Conference and Exhibition of the Air and Waste Management Association 2007, ACE 2007
PublisherAir and Waste Management Association
Pages2245-2250
Number of pages6
ISBN (Electronic)9781604238464
Publication statusPublished - 2007 Jan 1
Event100th Annual Conference and Exhibition of the Air and Waste Management Association 2007, ACE 2007 - Pittsburgh, United States
Duration: 2007 Jun 262007 Jun 29

Publication series

Name100th Annual Conference and Exhibition of the Air and Waste Management Association 2007, ACE 2007
Volume4

Other

Other100th Annual Conference and Exhibition of the Air and Waste Management Association 2007, ACE 2007
CountryUnited States
CityPittsburgh
Period07-06-2607-06-29

All Science Journal Classification (ASJC) codes

  • Pollution
  • Water Science and Technology
  • Waste Management and Disposal

Fingerprint Dive into the research topics of 'Removal of chloride from EAF-dust by reactive roasting at low temperature'. Together they form a unique fingerprint.

Cite this