NOUFERROUS METALLURGICAL EQUIPMENT

Abstract:In order to accurately predict the original emission concentrations of SO2 and HCl acid gases from waste-to-energy incineration plants, a BP neural network prediction model for original concentrations of acid gas was established by using the Copula function to explore the magnitude of correlation between multiple operating parameters and acid gas emissions, and the parameters with greater correlation as input parameters for original concentration prediction were selected. The effectiveness of the above analysis method and prediction model is demonstrated by an example analysis with actual measured operational data of a waste incineration plant.

Abstract:This paper discusses the production of Ag-4Cu-0.5Ni electrical contact alloy using high vacuum induction furnace, and characterizes and analyzes its microstructure, hardness and conductivity. Research shows that the addition of Sc, Zn and B can refine the grains of the alloy; XRD calculations show that the lattice constant of the alloy decreases with the addition of Sc, Zn and B; the addition of Sc, Zn and B elements enhances the hardness of Ag-4Cu-0.5Ni due to the effect of fine grain strengthening and second phase strengthening. On the other hand, the addition of Sc, Zn and B produces more grain boundaries and defects, which enhances the scattering during electron transport and leads to a decrease in the conductivity of Ag-4Cu-0.5Ni.

Abstract:Traditional graphical, experimental and analytical methods are complicated to draw and have a large calculation workload, and cannot provide a good theoretical model for engineers and technicians. This paper proposes the alternative option of using the velocity transient method to solve the angular velocity and linear velocity of the stirrer mechanism, and the layout function in SolidWorks to sketch the stirrer mechanism, add geometric constraints, and set dimensional parameters to complete the stirrer mechanism design and transient positioning. The Motion function in SolidWorks software is used to simulate and analyze the motion trajectory, angular velocity and linear velocity of the agitator component, and is verified to meet the three basic propositions of planar linkage design, and provide reference and basis for similar design requirements.

Abstract:In underground mines explored by the bottomless column segmented crumbling mining method, the ore mining and roadway excavation processes mainly include roadway excavation, blasting and recovery, pumice cleaning, secondary crushing, roadway support, shaft construction, etc., which usually require a lot of manual on-site work. The operators of roadway digging and recovery process are exposed to the working surface for a long time, which is labor-intensive and has poor working environment, and there are safety risks such as roofing, flaking and equipment strike. Adopting advanced mining operation technology, the Mengku iron ore mine uses dollies in all aspects of the mining operation cycle to realize mechanized operation. This enhances the essential safety of operation, improves the operating environment and reduces the labor intensity. Through on-site production practice, a complete, safe and efficient mechanized operation line has been formed to achieve the goal of reducing manpower.

Abstract:At present, for the vast majority of smelting enterprises, management for smelting slag in the slow cooling field still remains manually operated, backed, and recorded. Slag bag information, slow cooling time records, slag bag vehicles, water cooling equipment parameters and other useful information cannot be timely and accurately transferred to all parts of the system, and cannot apply accurate control to the slow cooling time. This affects the recovery of copper particles flotation index, and leads to many problems in the slow cooling field management. Any potential accident would seriously threaten the safety of production site operators, damage surrounding equipment and facilities, and pose a fire hazard. Taking into account practical conditions, company carries out thorough integration of the melting slag slow cooling field and production management. The company conducts research and formulates corresponding technical solutions and technical routes on the basis of careful consideration and experimentation. With a new generation of information technology such as industrial Internet of Things, edge computing, big data, artificial intelligence, and intelligent control, an intelligent slag cooling field is built, and the unattended slag cooling field and intelligent scheduling of slag package transportation are realized in accordance with the requirements of the production process.

Abstract:Intelligent electrical equipment has emerged in the current trend of digitalization and intelligence. This paper investigates the status of intelligent electrical equipment and analyzes the advantages of intelligent power distribution schemes using intelligent electrical equipment. It analyzes the feasibility of applying intelligent electrical equipment in nuclear power plants through a study of the application scheme of intelligent electrical equipment in nuclear power plants, providing guidance for the direction of electrical intelligence research in nuclear power plants under construction and in operation.

Abstract:In recent years, under the dual influence of the continuous high growth of the global new energy vehicle market and the trend of high nickel for power batteries, high nickel matte has attracted much attention as an important raw material for battery-grade nickel sulfate. In this paper, two mainstream pyro smelting processes of laterite nickel ore for the preparation of high nickel matte are introduced, the problems of the currently selected metallurgical kilns are analyzed, and solutions are proposed. Based on the two patented technologies of Bottom-Blowing Smelting Process and Side-Submerged Combustion Smelting Process with independent intellectual property rights, China ENFI Engineering & Technology Co., Ltd. has developed and designed the compound sulfide blowing furnace for the preparation of nickel matte from ferron and the side-blowing reduction furnace for the preparation of nickel matte from sulfide roasted sand. The structural features and application advantages of the two furnace types are introduced in detail in this paper.

Abstract:This paper introduces the process flow and reduction and sulfurization principle for the industrial process of cobalt extraction from converter slag electric furnace, and, taking into account actual production, describes the process parameters control from the four aspects of smelting temperature, SiO2/Fe, reduction and sulfurization with a view to improving the recovery rate of cobalt.

Abstract:The development of battery-driven, trackless mining equipment has been gaining traction. Battery shovels with traditional quantitative hydraulic systems cannot are incapable of working a full underground shift (about 8 hours). This thesis demonstrates the feasibility of using a variable hydraulic system to counter the battery range problem.

Abstract:This paper looks at the phenomenon of spontaneous combustion of white soot in the electric precipitator of the oxygen-rich bottom-blow melting and blowing system of SDIC Jincheng Metallurgical Co., Ltd. It analyzes and summarizes the causes, hazards and preventive measures for the spontaneous combustion of white soot. A series of improvement measures has been effected taking into account practical conditions and production status in the three years since the system was first put into production, effectively curtailing the spontaneous combustion of white soot. On-site environmental pollution and packaging staff health hazards caused by white soot spontaneous combustion, increased labor intensity and cost inflation due to re-packaging, lack of long-term storage solutions and other related issues have also been thereby addressed.

Abstract:In the production process of zinc hydrometallurgy, the determination of cadmium in the product copper slag generally adopts atomic absorption spectroscopy, which has a large error margin and numerous interfering factors. Another method, the ICP-AES method, produces relatively stable and reliable results, but with high analytical cost posing difficulty for widespread application. In order to overcome the above mentioned shortcomings and provide accurate and reliable data in production, an analytical method for the determination of cadmium in copper slag by oscillometric polarimetry with hydrochloric acid-ammonium acetate as the substrate was developed. The method is based on 10% hydrochloric acid and 10% ammonium acetate, and uses the characteristics of oscillometric polarimeter with high resolution and resistance to the interference of first reducing ions to quickly determine the amount of cadmium in copper slag, while adopting ascorbic acid as the reducing agent to eliminate the interference of Fe3+ on the determination as well as to facilitate deoxidation. This method has a determination content range as wide as 0.1%~15%, with spiked recovery up to 99.30%~100.50%, and relative standard deviation ≤ 0.60%. Via analysis of experimental data, this paper illustrates the practicality, accuracy and cost-efficiency of this method, and argues for its suitability for general application.

Abstract:This paper introduces the development of an efficient palletizer more suitable for palletizing large-size hot-rolled aluminum sheets off the line, as an replacement for the traditional palletizers configured in the aluminum hot-rolling line. The design combines the characteristics of hot-rolled aluminum sheets and the production features of traditional palletizers, and is tailored to meet the demand of aluminum plant customers.

Abstract:Underground where trackless rubber-tyred haulage cars carry out daily operations, hardened surfaces are rare and the roads are often rugged and waterlogged. The vehicles are often required to wade through water in a dusty, muddy, and watery environment. Mud, water and other impurities impair the performance of conventional brakes. Hence, for safety concerns, underground vehicles mostly adopt fully enclosed wet multi-disc brakes, with components fully enclosed to avoid contact with external impurities. This paper introduces the structure and principle of wet brake axles, and outlines the design of brake hydraulic systems.

Abstract:This paper analyzes the innovation model and practical results in equipment management at a ternary precursor material production company, using company data in trial production, production attainment, overproduction and other phases while taking into account equipment management statuses. The goal of the analysis is to strengthen equipment safety for the company s sustained development and provide points of reference for fellow enterprises in the industry.

Abstract:In non-ferrous metal mine engineering, because the waste water produced in the process of beneficiation contains residual beneficiation agents, which causes serious pollution to the environment, so the design of water supply and drainage system is more and more important for the construction of concentrator. Water balance is mainly introduced in this paper, the classification of the water system, the choice of process water, waste water pool, water pumping stations, high production design principle, and according to the specific links and points of water supply and drainage design of concentrator has carried on the thorough analysis, put forward some scientific design methods, in order to provide references for water supply and drainage design of concentrator