Low-emission synthesis of titanium alloys

DFG 1372年研究小组，由项目伙伴、克劳斯塔尔大学矿物和废物处理、废物处理和地质力学研究所(农发基金)和亚琛大学过程冶金和金属回收研究所(IME)组成，开发了一种工艺步骤较少的铝热法生产钛铝合金(灰合成)的方法。工艺步骤最小化的基础是生产和使用高纯度合成二氧化钛精矿，方法是在正常条件下用硫酸浸出和水解原子氢还原钛铁矿金属团聚体，并对金红石精矿进行机械活化。在铝热钛铝合金生产中使用这些材料，对助推材料的需求减少了30%，从而减少了氯排放。因此，1372年度第一阶段DFG课题组已经达到了上述项目合作伙伴的目标。第二阶段的目标是与行业合作伙伴以转让项目的形式将开发的技术转移到商业规模。农发基金将与工程公司SiebTechnik GmbH合作，通过对用于生产机械活化金红石精矿的旧偏心振动磨机的改造，努力引入符合行业标准的机械活化。另一个目的是从反应动力学的角度研究从大量原料钛铁矿中最大限度地减少合成二氧化钛的工艺步骤，并达到可以投入使用的程度。在这种情况下，行业合作伙伴SiebTechnik GmbH将在通过其离心机实验室进行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 Weisweier GmbH一起承担的部分是将开发的技术转移到吨级的规模。为实现这一目标，将使用机械活化的金红石精矿作为输入材料，并将编制热平衡表。还计划通过机械活化对低钾助推器混合物进行平行研究，这将由两个项目合作伙伴共同开发。应为铝热系统编制能源平衡表。通过真空惰性气体技术的应用，将灰分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.