用烧结法从沸腾炉渣中提取铝和铁的研究

Extraction of aluminium and iron from boiler slag by sintering

把沸腾炉渣和石灰及精煤混合制成小球,然后在大约1000℃下烧结。取不同烧结时间的样品用硫酸浸取,得到含有铝离子和铁离子的溶液。试验表明,采用浓度为4mol/l的硫酸,在80℃下浸取烧结球样品(50%沸腾炉渣∶40%精煤∶10%石灰)24 h,可以得到铝和铁的最大提取率,分别为86.50%和94.60%。滤渣可以作为固化材料用于高速公路的路基建设或水泥生产中的添加剂。

The boiler slag was pelletised with lime and fine coal to produce pellets,then sintered this pellets at about 1 000 ℃ for different times, The sintered pellets were leached by sulphuric acid to produce a solution containing aluminium and iron, An aluminium extraction efficiency of 86.05% was reached most when the sintered pellets（50% Boiler slag：40% fine coal： 10% lime）were leached with sulphuric acid and acid concentration of 4 mol ·l^-1 at 80℃ for 24 hour 5. The maximum of iron extraction efficiency of 94, 60% was achieved at the same conditions of the maximum extraction efficiency of AI. The leached residue would be used as a solidified material for highway construction or cement production.