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Ferro-phosphorus is an important industrial alloy, which plays a pivotal role in steelmaking, chemical industry, new energy and construction industry. The development and utilization of ferro-phosphorus can not only bring economic benefits to enterprises, but also contribute to the development of national economy. In this paper, the experiment was carried out under the conditions of T=1200℃-1400℃, R(CaO/SiO2)=1.0, t=60 min and C=12%. Phosphate rock and copper slag were used as raw materials, graphite was used as reducing agent, and ferrophosphorus was produced by reduction and roasting in a high-temperature energy-saving tubular furnace. The reduced samples were separated and ground, XRD, SEM and EDS were used to characterize ferrophosphorus and slag. The results showed that the main phase of ferrophosphorus obtained is Fe3P at T1300℃. After reduction, it was measured that the main component of the slag was silicate, mainly calcium metasilicate (CaSiO3) and a small amount of aluminum silicate.

Ray tracing has been regarded as the next generation of mainstream image rendering technology for a long time because of the authenticity of its rendering effect, and it is a hot research point in the field of computer graphics. In recent years, academics and commercials have extensively researched real-time ray tracing. To promote the research of real-time ray tracing, this paper reviews, analyses, and summaries the related literature. Firstly, the concept, algorithms, and classification of acceleration structures are introduced. Three commercial graphics processing units (GPU) supporting ray tracing are introduced and the differences between them are compared. This paper summarizes the optimization of ray tracing from six aspects, ray packet, stackless traversal, ray reorder, wide BVH, denoising techniques, and real-time ray tracing combined with the artificial?neural network, and expounds on the advantages and disadvantages of the relevant specific methods. Based on the acceleration of the algorithms, the hardware acceleration method on GPU and the dedicated architectures are summarized. Finally, this paper makes a brief summary of the content, points out the difficulties that real-time ray tracing is still challenged, and looks forward to the future development direction. It can help researchers systematically understand real-time ray tracing status and provide follow-up research ideas.