NOUFERROUS METALLURGICAL EQUIPMENT

Abstract:Hazardous waste causes great damage to the human health and ecological environment, and its harmful components except heavy metals can be fully eliminated by incineration. And the compatibility of hazardous waste is a necessary process to ensure sustainable, stable and economical operation of the incineration system. Based on the multi-objective optimization method and weighted solution algorithm, a compatibility model has been established in consideration of the largest comprehensive disposal capacity and optimal economic benefits. And the compatibility schemes of all target functions under different weights are solved, which not only guarantee the maximum operation capacity of hazardous waste incineration disposal system but also accommodate the largest economic benefits of hazardous waste disposal companies, providing a basis for the companies’compatibility schemes under different production loads and different market environment.

Abstract:Crushing system is a common process system in mining projects, and various types of crushing plant buildings are widely applied in mining projects. In this article, a tertiary crushing plant building in the crushing system of one project is chosen as a study case to analyze and study the key design elements including above-bin building, ore bin, under-bin support structure, belt conveyor system, crusher and foundations, etc., for reference by the engineering design personnel.

Abstract:At present, large mining enterprises have the demand of data flow integration and multi-source heterogeneous data processing and application. The mine industrial control loop network builds a transmission channel for the data flow of production control in the whole process of mine. As an information infrastructure, it effectively integrates multiple data and provides data services for production control and decision support. In this paper, through the construction of fusion network system, combining with the production data and industrial control data flow, it puts forward the relationship between the flow of data in intelligent mine construction and production organization. On this basis, the main contents of the intelligent management and control platform based on data services are sorted out. Finally, the requirements and main function settings of intelligent inspection App are proposed based on the multi-source heterogeneous data application of the mine intelligent management and control platform.

Abstract:Intelligent manufacturing concept needs to be introduced in anode production process where the intelligent level is low. By building a carbon full-process intelligent management and control platform, and integrating the material and energy management modules on the platform, such issues can be effectively solved. The theoretical framework and operational significance of unit consumption management module and energy unit consumption optimization analysis module are analyzed through the simulation case study. The results show that the control of intelligent logistics and energy in carbon plant can effectively save production cost, improve the level of automatic operation, pointing out the direction and laying a solid theoretical foundation for the future intelligent development of carbon plant.

Abstract:This article involves a high-efficiency cobalt recovery new process for treating DRC Cu-Co oxide ore, and makes a summary of certain process optimizations such as differentiated ore treatment, water balance management and high-efficiency cobalt recovery, etc., and in its concluding remarks it calls for emphasis on the subject of conducting efficient process design for mixed ore containing both oxide and sulfide.

Abstract:In this paper, the technological conditions of copper removal by sulfidization from nickel electrolyte are experimented and studied. The results show that the pH value of solution reaction, the oxidation reduction potential (ORP) value at reaction end point and the stages of sulfidization reaction are the key factors affecting the separation of copper and nickel in nickel electrolyte with hydrogen sulfide. The ORP value among them determines the copper removal efficiency and nickel loss in copper precipitate the reaction solution at low or high PH value is not favorable for copper removal; the Cu/Ni ratio of the precipitate obtained from two-stage sulfidization is better than that of single-stage. Under the controlled conditions of reaction temperature 60~70℃, the actual dosage of H₂S 1.2~1.5 times of the theoretical demand, the product solution ORP at the reaction end points of the first and second stage sulfidization reaction 110~180mV and -(115~120)mV respectively, the concentration of Cu ion in the solution after sulfidization can drop to less than 1mg/L, and the Cu/Ni ratio in the sulfidization precipitate is maintained above 15, proving the feasibility of the technology.

Abstract:Discharging and loading is an important process in pelletizing plant production. Loading efficiency is related to the output efficiency and economic benefits of pelletizing plant. The application of PLC control technology and lidar detection technology in loading system is the main technical method to improve the working efficiency of discharging and loading procedure and realize the automation of loading system. The intelligent discharge system developed by this research can realize the volume detection during the loading process and calculate the loading weight after actual field test. Compared with the weighing results of rail scale, this system can basically meet the operation requirements, and provide reliable technical support for the implementation of intelligent loading in finished product bin.

Abstract:Waste heat generator set for non-ferrous smelting enterprise is not only an important equipment for waste heat recovery, energy saving and emission reduction, but also an important equipment for the power system in the plant. Therefore, the reasonable protection configuration and setting calculation is not only a matter of safe and stable operation of the equipment itself, but also impacts the safe and stable production of the whole plant.

Abstract:Autoquant loading upgrading on concentrated sulfuric acid loading system has been designed and a technical proposal containing the analysis on the realization of control system as well as the software and hardware adopted is given.

Abstract:In view of the serious wind power curtailment under the rapid development of wind power in China, this paper proposes a scheme for accommodating wind power by adopting wind power tracking, the operation mode of heat accumulating type electric boiler. Based on the research results of wind speed pre-diction at home and abroad, and with the working mechanism analysis of heat accumulating type electric boiler, the control strategy adopting wind power tracking is put forward. The objective function is to minimize the wind power curtailment and operating cost, combined with the constraints of operation and energy balance of each unit, the grid model of heat accumulating type electric boiler is established. The simulation test shows that this strategy has great capacity to accommodate wind power and lower operating cost.

Abstract:This paper elaborates on the authors’research and application of on-site repair and maintenance operation standards for mining excavators in recent years, analyzes the importance of maintenance operations, studies the variances between theories and standards of on-site repair and maintenance operation for the excavators under various conditions and summarizes key procedures of operation standards. These research results have extended the service life of key components of mining excavators, solved technical problems of frequent breakdowns and prevented personal injury accidents in excavator repair and maintenance and thereby safeguarded safe, efficient and stable maintenance operation of excavator repair and maintenance, which bring good economic benefits and will be promoted in TISCO mines.

Abstract:Fan pitch control backup power supply can make the blades retract smoothly under the action of the variable pitch control system to avoid accidents when the fan has a power failure.In this paper, aiming at the existed problems of the fan pitch control backup power supply system, an emergency backup power supply scheme is designed adopting super-capacitor energy storage module and bidirectional DC/DC converter charge-discharge control.It has the advantages of wide operating temperature range, being eco-friendly and easy to realize remote monitoring of the state, which improve the reliability and stability of the fan operation and save the construction cost.The capacity selection of super capacitor, simple and effective voltage-sharing scheme and circuit, as well as double closed loop control strategy are discussed in this paper.The effectiveness of the scheme is verified by simulation test and actual measurement results.

Abstract:The programmable logic controller(PLC) features simple and convenient control, high reliability and simplified electrical circuit. In view of defects in the original control, studies are conducted to optimize the conventional relay control method. Control scheme is proposed with PLC as the core and programmed and loaded for application based on process requirements, equipment operation and control requirements. The control system, which mainly consists of electrical elements including the PLC control box, enables flexible configuration of operation cycle according to production requirements. As regards the dust discharge features of ESP for converting operations, SDIC Jincheng Metallurgy Co., Ltd replaces the conventional relay control system with PLC control system. The modified system substantially reduces production labor intensity, decreases power consumption and expands equipment operation cycle.

Abstract:Roll failure mechanism of morgan rolling mill in SCR copper rod production line has been analyzed with the random roll wear model, optimal replacement model and hot-rolled copper rod-rolling piece finite element model constructed. After optimized improvement, the “core” issue of roll failure as the technical “bottleneck” restricting the production of low-cost and high-quality copper rod and in the rolling process of similar production lines has been successfully addressed. Morgan rolling mill features a high availability, good quality of copper rod product, high safety in roll use, few rolling accidents, low roll consumption and low production cost.

Abstract:Zinc electrolytic insulation crane is one of the main equipment of zinc electrolysis workshop, and the safe, reliable and stable power supply of the trolley wire is the prerequisite for the stable operation of the crane. Therefore, the maintenance of the trolley wire is very necessary and meaningful.

Abstract:With the gradual improvement of the productivity of copper companies, the converting process in the refining plant, as an important procedure in the copper smelting operation, is highly critical of the primary and secondary air. Therefore, a large centrifugal blower with a stable air volume and a high air pressure is required as the air supply equipment in the converting process. There are three large blowers at the power center of Baiyin furnace, which are used as the air supply equipment for the new system. This converter blower is characterized by high rotating speed, large air output and high degree of automation, and thus the technical requirements and installation skills of the equipment are relatively high. However, in actual production, the front and rear bearings of the motor always suffer high-temperature heat and frequent oil leaks. This problem has been restricting and affecting the actual production of the converter. Unscheduled shutdowns often occur, or unnecessary shutdowns are caused by high temperature of the front and rear bearings, which directly affects the productivity of the converter. In more severe cases, this has caused severe shutdown accident where the front and rear bearings of the motor were burned out, restraining the normal operation of the converter. This article mainly introduces the comprehensive transformation of the converter motor lubrication system, including the transformation of the oil feed system, the transformation of the oil return system, the transformation of the bearing lubrication method, as well as the re-measurement of the bearing gap, scraping and press-fitting. Through a series of transformations, the temperature of the bearings during operation was reduced from the original 75℃ to 52℃ and the operation became stable.

Abstract:The mass production efficiency of the mainstream solar battery (passivated emitter and rear contact, PERC solar battery) has reached 23%, approaching the upper limit of theoretical value. The efficient solar batteries, represented by tunnel oxide passivated contact (TOPCon) and hetero junction technology (HJT) batteries, will replace PERC batteries to become the mainstream of the market because of their high efficiency. However, most of the core equipment of efficient batteries are still imported currently and at high prices, the development of Chinas new generation photovoltaic technology is directly impeded. In order to solve this problem, Chinese equipment manufacturers have done a lot of work, and have proposed packaged equipment solutions for different processes. In this paper, the characteristics and technology of two kinds of efficient solar battery are analyzed. According to the requirements of the core process, the localization progress of the core equipment of the two kinds of solar battery is introduced, and the future development trend of the related equipment is pointed out.

Abstract:The rapid development of computer technology, microelectronics technology, information technology and network technology is impelling Chinese companies to build smart mines overseas. At the same time, the construction of smart mines is becoming a critical way to improve the core competitiveness for the mining companies overseas. In view of the basic characteristics of overseas mines of Chinese-funded enterprises and the status quo of smart construction, the problems in the construction of overseas smart mines are elaborated and relevant countermeasures are proposed accordingly.

Abstract:In view of the important demand of information and intelligent upgrading of metal mine ventilation in China, the principle, key technology and system composition of mine intelligent ventilation are systematically studied. It is clearly stated that intelligent mine ventilation is a kind of operation which can supply air according to demand, it can transmit fresh air stably and economically to the mine continuously for personnel to breathe, dilute and discharge harmful gases and dust, improve the climatic conditions of the mine and have certain intelligent control of air flow during disaster relief. According to the existing problems of mine ventilation, this paper gives the ways to realize ventilation from the perspective of technical types, and expounds the safety strategy of metal mine ventilation. According to the concept of “combining peacetime and wartime”, it realizes the air supply according to demand and the intelligent decision-making and emergency control under the condition of abnormal disaster, which can not only meet the automatic management and maintenance of daily ventilation, but also can realize the emergency wind control in the period of disaster and effectively restrain the evolution of disaster. The theory and technology discussed in this paper can provide reference for building intelligent ventilation system in metal mines.

Abstract:Overvoltage protection of AC electrical devices and lightning protection of buildings are a relatively grand subject on which extensive theoretical explanations are elaborated in various standards and manuals. Different designers have different understandings on how to implement the specification requirements into practical applications. Combining with actual engineering practices, we elaborate on the parts that should be paid attention to and the points to be discussed. This article mainly focuses on the actual practices of lightning protection and grounding.

Abstract:Considering the characteristics of high-precision temperature control and high requirement on temperature field uniformity of heat treatment furnace for non-ferrous metal physical and chemical analysis, a computer distributed control system is developed to realize signal acquisition and control of multiple heat treatment furnaces. The system features simple operation, easy data storage, efficient fault alarm, and low production cost, etc. It facilitates real-time process monitoring on production equipment, which meets the real demands in production.

Abstract:The requirements of energy saving, emission reduction, and cyclic development are phasing out outdated distribution transformers which have been running in the power grid for a long term as their power consumption indexes fail to meet the current national technical standards. The promotion and application of new technology triggers the flowing of the large quantity of outdated transformers towards the recycling market. The low threshold for recycling brings about the emergence of abundant uneven-level recycling companies. The unregulated recycling and treatment result in market order disruption and the hazardous wastes cause environment pollution. This article expounds from the aspects of market distribution, recycling status, recycling treatment methods, industry chain of cyclic economy, analyzes recycling modes and existing problems, as well as probes into standardized management methods.

Abstract:Pipeline external detection is an important part of pipeline integrity management and it requires the collection of location information of featured points on the pipeline during detection. The routing of a natural gas pipeline is detected with portable GPS, single base station RTK and CORS. Some of the points are subject to deviation verification with total station. It shows the unsatisfactory positioning accuracy and coordinate repeatability of common portable GPS. Single base station RTK can achieve relatively accurate positioning, but with low efficiency. High-precision positioning can be obtained by using CORS positioning technology with its high efficiency and wide coverage. With the development of surveying technology and the requirements of relevant specifications, it is an inevitable trend to use CORS technology to achieve large coverage and high-precision positioning of pipelines.

Abstract:ERP-Enterprise Resources Planning Enterprise resource Planning management system, to improve the Enterprise business process performance is a collection of a series of activities, set the project plan, bidding and purchasing, inventory control, distribution of business and progress tracking, and other functions into an organic whole, realize the information flow, logistics, cash flow, flow and business flow of organic integration, and improve customer satisfaction.Based on a large number of relevant literature, this paper discusses the application scope of ERP in enterprises, and puts forward opinions and suggestions on the implementation of ERP in enterprises.