Due to the rapid increase in aluminum production from high-grade bauxite ores, such reserves are fast depleting. Determining cost-effective processes for the treatment of low-grade bauxitic ores, utilization of different wastes and byproducts of aluminum industries, and improvement in the extraction process steps are some of the pertinent issues. Red mud, i.e., bauxite residue, is a serious threat to the environment that needs serious attention for its end use. Another issue is the effective utilization of fly ash generated in the captive power plant. This presentation covers some of the R&D efforts made by CSIR-IMMT such as (1) bauxite beneficiation process to remove reactive silica and iron minerals, (2) recovery of Al₂O₃ and other value-added products from fly ash, (3) utilization of bauxite residue to manufacture of bricks, (4) producing boehmite and gibbsite from Bayer’s liquor by means of organic additives, and (5) producing value-added Al-based chemicals from Al dross.

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CSIR-IMMT的研发工作旨在解决与铝生产相关的一些问题

由于高品位铝土矿的铝产量快速增长，因此此类储量正在迅速减少。确定用于处理低品位铝土矿的成本有效方法，利用铝工业的不同废物和副产品以及改善提取工艺步骤是一些相关问题。赤泥，即铝土矿残留物，是对环境的严重威胁，最终使用时应引起高度重视。另一个问题是如何有效利用自备电厂产生的粉煤灰。本演讲介绍了CSIR-IMMT所做的一些研发工作，例如（1）铝土矿选矿工艺以去除活性二氧化硅和铁矿物质，（2）回收Al ₂ O ₃ 以及粉煤灰的其他增值产品；（3）利用铝土矿渣生产砖块；（4）通过有机添加剂从拜耳的酒中生产勃姆石和菱镁矿；以及（5）生产增值的铝基化学品来自Al dross。