SO2 emissions during roasting and smelting of highly roasted nickel concentrates

高度焙烧镍精矿焙烧和冶炼过程中 SO2 排放

• 批准号: 370957-2008
• 负责人: Utigard, Torstein
• 金额: $ 2.19万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=461100
• 关键词: SO2; emissions; during; roasting; smelting

To decrease SO2 emissions from Vale-Incos smelter in Thompson and from Xstratas nickel smelter in Falconbridge, one option is to carry out a very high degree of oxidation in the fluid bed roasters, effectively removing most of the sulphur in the concentrate. The SO2 emitted from the roasters can readily be converted into sulphuric acid and not be let into the atmosphere. This will significantly lower the SO2 emissions from the subsequent furnace smelting and converting steps, from which it is much more difficult and costly to collect and convert the SO2 into acid.

为了减少汤普森的Vale-Incos冶炼厂和Falconbridge的Xstratas镍冶炼厂的二氧化硫排放量，一种选择是在流化床焙烧炉中进行高度氧化，有效地去除精矿中的大部分硫。 从焙烧炉排放的SO2可以很容易地转化为硫酸，而不会进入大气。 这将显著降低来自随后的熔炉熔炼和转化步骤的SO2排放，从所述熔炉熔炼和转化步骤收集SO2并将其转化为酸要困难得多且成本高得多。