Technology of Recovering Refractory from Waste of Bauxite Chamotte by Color Separation Technology
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摘要:
铝矾土在烧成熟料后，含铁高的铝矾土熟料因颜色差异被人工手选挑出；而手选出的高铁铝矾土熟料因无法满足耐火材料的要求而被抛弃。本实验以高铝熟料的废料为原料，先将原料破碎为至5～10 mm，再通过色选机对原料进行分选，最后可得到全铁含量低于2%的合格耐火材料原料。精矿产品全铁品位为1.48%，产率为33.12%。该技术可有效提高耐火行业的铝矾土利用率，具有较为广泛的应用前景。
Abstract:After the bauxite is fired into the clinker, the bauxite chamotte high in iron content is handpicked out because of the color difference, and the bauxite chamotte high in iron content by handpicked was discarded because it does not meet the requirements of the refractory. This test takes waste of bauxite chamotte as raw materials. Firstly, the raw materials are crushed to 5～10 mm, and then the raw materials are sorted by photoelectric color separator. Finally, qualified refractory raw materials with total iron content less than 2% can be obtained. The total iron grade of concentrate product is 1.48% and the yield is 33.12%. This technology can effectively improve the utilization rate of bauxite in refractory industry, and has a wide application prospect.
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Key words:
- Bauxite chamotte /
- Waste with high iron /
- Photoelectric color selection /
- Refractory
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表 1 原料的化学成分分析结果/%
Table 1. Chemical composition analysis results of raw materials
Al2O3 SiO2 Fe2O3 TiO2 K2O Na2O CaO MgO 50.10 36.90 3.42 2.35 0.39 0.047 0.60 0.15 
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表 2 高铁铝矾土熟料色选实验结果
Table 2. Test results of color sorting of high iron bauxite clinker
产品名称 产率/% 品位/% 回收率/% Al2O3 Fe2O3 Al2O3 Fe2O3 白色精矿 33.21 60.39 1.46 35.49 12.97 红褐色中矿 48.99 55.83 3.69 48.4 48.35 黑色尾矿 17.80 51.15 8.12 16.12 38.68 合计 100.00 56.51 3.74 100.00 100.00
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表 3 原料及分选后产品主要物质组成结果/%
Table 3. Results of main material composition of raw materials and sorted products
产品名称 莫来石 刚玉 方石英 赤铁矿 斜长石 原矿 71.0 11.5 12.0 3.5 1.0 精矿 71.0 13.0 10.0 0.2 5.0 中矿 79.5 7.0 10.0 1.0 1.0 尾矿 70.0 10.0 8.0 5.0 5.5
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