Abstract: The calcining experiment of copper-containing slag in oxygen atmosphere was carried out. Techniques such as XRD, H2-TPR, BET and SEM analysis were used to examine the effects of pre-calcination on its surface morphology, crystal structure, existence form and distribution of elements. The effect of pre-calcined copper slag on gasification characterization was investigated in a self-build experimental apparatus of biomass gasification. The analysis results indicate that the formation of Fe3O4 and a-Fe2O3 is due to the extrusion of iron from the fayalite in the slag during pre-calcination. With increasing of calcination temperature, prolonging of calcination time and decreasing of particle size, the characteristic peaks of Fe3O4 show a trend of first increasing and then decreasing, while the characteristic peaks of Fe2O3 were enhances. The experimental results of biomass gasification show that the pre-calcined copper slag enhances gas production and quality (H2 19.61%~21.35%, CO 32.55%~36.89%). The increase of catalytic activity of pre-calcined copper slag is due to the formation of Fe3O4 and Fe2O3.

Key words: copper-containing slag, calcination, characterization, catalysis, biomass, gasification

摘要： 在氧气气氛下对铜渣进行煅烧，通过XRD, H2-TPR, BET和SEM手段系统地分析了煅烧温度、时间及铜渣粒径对煅烧后铜渣表面形貌、晶体结构、元素Fe存在形态的影响，并通过自建实验台进行气化实验考察煅烧对铜渣催化生物质气化活性的影响. 结果表明，煅烧使Fe从铁橄榄石中脱离出来以Fe3O4和Fe2O3的形式存在，随煅烧温度升高、时间延长、铜渣粒径变小，铜渣内Fe3O4峰先增强后变弱，Fe2O3峰不断增强. 气化实验结果表明，预煅烧后铜渣催化生物质气化产气中H2量由19.61%增至21.35%，CO量由32.55%增至36.89%，由此推断Fe3O4和Fe2O3的形成是预煅烧铜渣催化活性提高的原因.

关键词: 铜渣, 煅烧, 表征, 催化, 生物质, 气化