Synthesizing of realistic model textures of mineral raw materials based on quantitative characteristic numbers of the texture as basis for the simulation of comminution processes

基于纹理的定量特征数合成矿物原料的真实模型纹理作为通信过程模拟的基础

• 批准号: 320596194
• 负责人: Professor Dr.-Ing. Holger Lieberwirth
• 金额: --
• 依托单位: Institut für Aufbereitungsmaschinen
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/320596194?language=en
• 关键词: Synthesizing; realistic; model; textures; mineral

The importance of simulation based research increases also in the field of mineral processing technology considering the limited resources for research with machinery on one hand and more and more powerful computer technology at attractive prices on the other hand. Particularly, in the field of comminution technology, known empirical and partly empirical research methods were replaced or supplemented by the specific use of simulation methods. Parallel to the simulation approaches regarding the liberation of valuable minerals, particularly the Discrete-Element-Method has emerged as an accepted tool With regard to the comminution technology, simulations that use so called Bonded Particle models (BPM) within DEM environments seems to be the best choice. However, the number of simulations of comminution behavior is still small and their significance is limited. One reason for this is certainly that so far no sufficiently clear correlations between the parameters of the DEM model on one side and the binding mechanisms of real particles on the other side were found. Furthermore, the literature still shows no adequate method to realistically transfer microstructures of natural mineral raw materials into the simulation environment. However, in order to develop effective processing technologies using simulation tools, the material and mineralogical properties of quantitatively analyzed structures have to be mapped statistically representative by the model. Without these fundamentals, the robustness of the statements derived from the models is limited. The aim of the project is therefore, to realistically map hard rocks and ores on the basis of the quantitative microstructural analysis developed at the Institute of Mineral Processing Machines into a Bonded-Particle-based DEM model. Moreover, the mapping has to involve all determined characteristics of the mineral structure. In addition, the micro hardness and fracture toughness of the minerals have to be considered in order to define the bonding parameters between the discrete elements. By combining a Bonded Particle Model, which represents the grain structure realistically, with strength parameters that are mineral specific, a significantly higher prognostic accuracy of DEM models for hard rocks and ores is expected.

基于模拟研究的重要性在矿产加工技术领域也提高了，考虑到有限的一方面研究资源，另一方面用机械进行了研究的资源有限，另一方面，计算机技术越来越强大。尤其是在洞穴技术领域，通过模拟方法的特定使用代替或补充了已知的经验和部分经验研究方法。与关于有价值的矿物质解放的模拟方法，尤其是离散元素方法的模拟方法已成为一种公认的工具，这些工具在粉碎技术方面，使用所谓的粘合粒子模型（BPM）在DEM环境中似乎是最佳选择。但是，粉碎行为的模拟数量仍然很少，其意义受到限制。造成这种情况的原因之一当然是，到目前为止，一侧的DEM模型参数与另一侧的真实粒子的结合机理之间没有足够的清晰相关性。此外，文献仍然没有足够的方法将天然矿物原材料的微观结构转移到模拟环境中。但是，为了使用模拟工具开发有效的处理技术，该模型必须在统计上代表定量分析的结构的材料和矿物学特性。没有这些基本原理，从模型中得出的陈述的鲁棒性是有限的。因此，该项目的目的是根据矿物加工机研究所开发的定量微观结构分析，实际绘制硬岩石和矿石，以基于键的粒子DEM模型。此外，映射必须涉及矿物结构的所有确定特征。另外，必须考虑矿物质的微硬度和断裂韧性，以定义离散元素之间的键合参数。通过将键合粒子模型与矿物特异性的强度参数相结合，该模型的强度参数可预期DEM模型的预后准确性明显更高。