NOUFERROUS METALLURGICAL EQUIPMENT

Abstract:选矿厂的智能化升级转型是建设现代矿山企业的必然选择，其建设目标及实施路径与广义智能工厂建设有着显著差异。本文结合选矿厂智能化建设背景、面临的问题，探讨了选矿厂智能化的建设目标，提出了智能选矿厂的建设路径：智能装备与智能感知、过程自动化稳定运行、工艺优化控制、信息化生产管理以及与之匹配的生产组织管理体系，最后给出了选矿厂智能化建设的实施步骤建议。

Abstract:弯管是化工及电力管道中容易失效的构件之一。本文通过电化学测量研究了碳钢弯管段不同入口流速（1m/s、2m/s和3m/s）下腐蚀电流密度的分布情况，并基于稳态传质电化学腐蚀结合电偶腐蚀理论建立了碳钢弯管段肘部流动加速腐蚀预测模型。试验结果表明，碳钢弯管段的腐蚀电流密度最大值出现在弯管段的最外侧，这说明弯管外侧的弯曲部位更容易发生穿孔。此外，弯管段的电偶腐蚀密度分布与试验结果和电厂实际统计情况相一致，验证了该模型的准确性。研究结果可为电力、化工等工业输运管道的设计优化和运行监测提供有效依据。

Abstract:Due to the high temperature and invisibility of metallurgical furnaces, most measurement methods are limited. Therefore, this paper uses numerical simulation to analyze the flow field and mixing efficiency in the oxygen-rich copper side-blown smelting furnace at high temperature. Affected by buoyancy, the side blown airflow has regional characteristics, mainly stirring the melt directly around the upward trajectory of the airflow. There is a low-speed area in the center of the melt pool, with a speed less than 0.1m/s. Due to the backflushing of the side blowing airflow, the high-stress area on the wall is concentrated near the nozzle and around the upward path of bubbles. The wall stress in this area is 2-3 times that of the wall stress between adjacent spray guns, making the furnace lining more susceptible to damage. By analyzing the distribution of circulating currents in the molten pool, the molten pool is divided into a high-speed blowing zone and a circulating stirring zone along the axis of the spray gun. The circulating stirring zone is the main reaction zone, with a velocity of less than 1m/s, but the velocity distribution is more uniform, and the mixing time of the components is 34.10 seconds. The parallel circulation injection technology has the most significant improvement on the mixing efficiency of the molten pool, with turbulent viscosity 1.51 times that of the original operating conditions and a relative reduction of 62.18% in mixing time.

Abstract:In practical engineering, the flue tube group within the waste heat boilers is frequently worn by scouring of the flue gas. To deal with this situation, the experts usually using several adding fins to protect the tube group, which could reduce the scouring of flue gas. However, the design of the adding fins, including the number and the position is mostly based on experience, which lacks of theoretical support and verification. In this article, the influence of adding fins on the flow field of the flue gas is studied by CFD simulation. Furthermore the optimizes design of the fins is achieved by analysing simulation results.The simulation results show that the addition of fins to the tube group has a diversion effect on the flue gas, which can improve the flow uniformity of the flue gas in the pipeline, and at the same time, the fine design of the width and height of the fins can further improve the flue gas flow uniformity and improve the heat exchange efficiency between the flue gas and the tube group.

Abstract:In order to improve the effect of planar magnetic abrasive finishing, the change of magnetic field is enhanced to make the abrasive roll and renew. In this paper, a magnetic particle grinding device with permanent magnet alternating field was designed. The device uses the alternating magnetic field generated by the permanent magnet alternating pole for magnetic particle grinding processing. Software was used to simulate the permanent magnet alternating magnetic field and observe the change of magnetic induction intensity in the grinding area. During the grinding experiment, SUS304 stainless steel plate was used as workpiece, grinding time is 30min, magnetic abrasive particle size is 80 mesh, the spindle speed is 150r/min, 200r/min and 250r/min. Surface morphology and roughness of the workpiece before and after grinding were compared by using ultra depth microscope and stylus roughness measuring instrument. By comparison, it can be concluded that surface morphology of SUS304 stainless steel plate is gradually improved, nearly all the texture and pits were removed. Surface roughness is reduced from the original 0.329μm to 0.069μm, and the effect of finishing is achieved. Usage of permanent magnet alternating magnetic field magnetic particle grinding device can speed up the renewal of magnetic particles, and make the grinding track more complicated, thus improving the grinding effect and grinding efficiency.

Abstract:Grinding is one of the key operations in the beneficiation process. Traditional beneficiation plants often adjust the grinding process frequently due to fluctuations in the grindability of the ore. The adjustment of related control parameters mostly relies on manual experience. A certain beneficiation plant in the Democratic Republic of Congo has similar problems with grinding operations. After in-depth research on traditional beneficiation plant processes and the intelligent transformation and process control requirements of Congo (DRC) beneficiation, this article proposes a grinding optimization control expert system solution. Through the intelligent control strategy of grinding process flow, the production process and process equipment are transformed, achieving intelligent control and process classification optimization of the grinding process, it provides technical solutions and construction paths for the optimization and intelligent upgrading of the beneficiation plant's process flow.

Abstract:Taking the high-speed vertical five axis machining center ram as the research object, the initial structural design principle was elaborated. Then, based on the theory of static and dynamic analysis, finite element analysis was used to conduct static and modal analysis on it. In order to further improve its dynamic characteristics, topology optimization method was used for lightweight design of the ram structure, and a comparative analysis was conducted on the structure before and after optimization. After the final optimization, the mass of the ram was reduced by 31%, and the first-order natural frequency increased by 22.4%. This study not only improves the dynamic performance of the machine tool ram components, but also achieves lightweight design of the ram components. This method lays the foundation for the optimization design of other key components and the whole machine of this type of machine tool.

Abstract:This article conducts process research and cause analysis on the damage of the impeller of the high-temperature preheater feeding pump in the high-pressure acid leaching system of a certain project's laterite nickel ore during the trial run and production process. The root cause of the problem is identified, providing a feasible basis for solving the problem, and optimizing and improving the existing operating procedures and trial run plan. The process design, equipment selection, structural design, material selection and other aspects play a qualitative role, providing guidance and reference cases for solving similar project problems.

Abstract:The slag slow cooling process is an indispensable link in the pyrometallurgical copper smelting process. The slag slow cooling treatment system urgently needs an intelligent upgrade with the increasing demands for slag treatment technology, resource recovery and safety management. The paper analyzes the characteristics of the slag slow cooling treatment process and presents the adaptive conditions for the whole-process intelligent transformation. Through key technologies such as 5G communication networks, intelligent management and control of gantry cranes and electric flatbed carts, the independent operation and intelligent control of the entire slag transfer process have been realized. After the implementation of the project, the number of operators was reduced by nearly 60%, and the average slow-cooling cycle of the slag ladle was shortened by more than 7%, achieving good economic benefits.

Abstract:This paper analyzes the operation situation of the existing fugitive gas collection system in the smelting workshop of Jintong Copper Industry. It points out that there are some problems in the fugitive gas collection system, such as unreasonable design of the hood and the ductlines as well as some defects in on-site management which caused low altitude environmental pollution in the workshop. By reforming the hood and the ductlines, adjusting the valve control method as well as adding emergency branches, the pollution phenomenon in the workshop has been effectively controlled, the working environment of the smelting workshop is greatly improved.

Abstract:Copper smelting plants transfer anode plates out of the furnace. A combination of forklift forklift and vehicle transportation is commonly used to transfer anode plates. The quality of anode plates is controlled by manual selection and testing, which is labor-intensive and has high operating costs. It is not conducive to enterprise production cost control.This article introduces an automatic transfer and storage production mode of anode plates. Through automatic extraction, cleaning, detection, sorting, storage and transfer operations of anode plates, automatic transfer of anode plates replaces the manual transfer operation mode, effectively reducing personnel labor intensity and reducing production. Operating costs.

Abstract:The rapid development of 5G, cloud computing, AI and other ICT technologies has provided new development opportunities for traditional mines. Mines are faced with key structural problems such as insufficient resources, increasing mining difficulty, high production cost per unit of ore, and high risk of future labor force, which urgently need to be solved by digital and intelligent means. Narrow rail transportation of raw ore is an important process of mining, the deployment of unmanned electric locomotive is of great significance to the construction of intelligent mine, automatic unloading of electric locomotive in the process of unmanned operation is an important link of unmanned driving, and it is also a technical difficulty that unmanned driving needs to break through. This research applies the integration of new technologies such as “laser sensor, liDAR level meter, AI vision, radio frequency beacon, and high precision coding” to complete the complex process of automatic mine unloading of electric unmanned locomotive, which can meet the goal of electric locomotive unmanned driving and production efficiency requirements.

Abstract:As the artificial intelligence strategy begins to explore innovative applications in various industries, the realization of intelligent operation of special logistics equipment in the metallurgical industry has become a development trend, and the application of its remote over-the-horizon control technology is the key breakthrough. The slag treatment operation in the metallurgical industry belongs to the special logistics equipment operation in the closed scene, which has the characteristics of typical logistics transportation. Once the innovation breakthrough of new application technology, it will be able to achieve the promotion and application of new technology in the entire industry, improve the work efficiency and safety level of the industry, and strengthen the operation competitiveness of enterprises. Step by step to big data and intelligent logistics based on the industrial Internet.This paper introduces the laser intelligent perception control concept on how to achieve safe, reliable and controllable operation in the holding process of the holding tank truck with the remote beyond visual range control technology, and discusses the identification and detection methods in detail, hoping to provide a technical scheme that can be used for reference to solve the safety and reliability of the holding tank truck in the holding process with the remote beyond visual range control technology.

Abstract:In the industrial production of zinc hydrometallurgy, zinc ash is the by-product of electrolytic cathode zinc sheet melting and impurity removal in zinc melting induction furnace. Zinc ash contains about 80% zinc, of which more than 70% zinc exists in elemental form. In this paper, the advantages and disadvantages of dry and wet treatment processes are compared, the key equipment selection and capacity calculation for the dry treatment process are mainly introduced, and combined with the actual production situation the process equipment is improved and perfected after production.