Low-emission synthesis of titanium alloys

由项目伙伴、克劳索尔大学矿物和废物处理、废物处置和地质力学研究所（农发基金）和亚琛大学工艺冶金和金属回收研究所（IME）组成的DFG 1372研究小组开发了一种铝热法生产钛铝合金（ASH-合成）的方法，涉及较少的工艺步骤。工艺步骤最小化是基于在正常条件下使用硫酸浸出和水解原子氢还原钛铁矿金属团块和金红石精矿的机械活化来生产和使用高纯度合成TiO2精矿。在铝热钛铝合金的生产中使用这些材料导致对助推器材料的需求减少了30%，从而减少了氯的排放。有了这个结果，第一期DFG研究组FOR 1372已经达到了他们对上述项目合作伙伴的目标。第二阶段的目标是与业界合作伙伴以转让项目的形式将已开发的技术转化为商业规模。农发基金与工程公司Siebtechnik GmbH合作，将努力通过改造用于生产机械活化金红石精矿的旧偏心振动磨机，使机械活化法适用于工业。另一个目的是从反应动力学方面研究从大量原料钛铁矿合成TiO2的工艺步骤最小化，并达到可以投入使用的程度。在这种情况下，工业合作伙伴Siebtechnik GmbH将通过其离心机实验室在浸出和水解后的固液分离步骤中提供支持。IME将与冶金公司Elektrowerk Weisweiler GmbH共同承担的部分是将已开发的技术转移到吨规模。为了实现这一目标，将使用机械活化的金红石矿精矿作为输入材料，并将制定热资产负债表。同时还计划对机械活化的低钾助推器混合物进行平行研究，这将由两个项目伙伴共同开发。将为铝热系统拟定能源收支平衡表。真空惰性气体技术的应用将灰合成的工业应用提升到一个更高的技术水平。

The DFG research group FOR 1372, comprising the project partners, the Institute of Mineral and Waste Processing, Waste Disposal and Geomechanics at the University of Clausthal (IFAD), and the Institute of Process Metallurgy and Metal Recycling at the University of Aachen (IME), developed a method for the aluminothermic production of titanium aluminium alloys (ASH- synthesis) involving fewer process steps.The process step minimisation is based on the production and use of high-purity synthetic TiO2 concentrates by reducing ilmenite metal agglomerates with atomic hydrogen using sulphuric acid leaching and hydrolysis under normal conditions and on the mechanical activation of rutile concentrates.The use of these materials in the production of aluminothermic titanium aluminium alloys led to a reduced need for booster material by 30% and thus to reduced chlorine emissions.With this result, the first phase DFG research group FOR 1372 has reached their target for the above mentioned project partners. The target of the 2nd phase is to transfer the developed technology to a commercial scale in the form of a transfer project with partners from the industry.IFAD, in cooperation with the engineering company Siebtechnik GmbH, will strive for an industry-compatible introduction of the mechanical activation through the modification of the used eccentric vibratory mill for the production of mechanically activated rutile ore concentrate. Another aim is to investigate the process step minimised production of synthetic TiO2 from the mass raw material ilmenite in terms of reaction kinetics and to get to a point where it can be put into use. The industry partner Siebtechnik GmbH shall, in this case, provide support in the separation steps solid-liquid after leaching and hydrolysis through the their centrifuge laboratory.The part that IME will take on together with the metallurgical company Elektrowerk Weisweiler GmbH is the transfer of the developed technology to a scale in tons. To achieve this, mechanically activated rutile ore concentrate will be used as input material and thermal balance sheets will be drawn up. A parallel research on low potassium booster mixtures by mechanical activation is also planned, which is to be developed jointly by both project partners. Energy balance sheets are to be drawn up for the aluminothermic system. The industrial application of the ASH synthesis is to be elevated to a higher technical level by the application of vacuum inert gas technology.