Latest ArticlesThe quality of 100-meter heavy rail refers to the high spot or surface wave produced by the instability of the billet tension, and cross-sectional size and tension are closely related. In the micro-tension control system, the main control thought of metal mass flow being equal is put forward, and the micro tension is controlled by the speed synchronization and the head force arm memory method of universal mill.
Based on the design requirements of IGBT DC chopper electric drive system for 80 t mining electric locomotive, this paper expounds the structure, main technical indexes, circuit working principles and characteristics of IGBT DC chopper electric drive system, analyzes the characteristics of IGBT DC chopper non-absorbing loop technology, and carries out the technical transformation of electric drive system for the old cars. After transformation, the using quantity of cables has been greatly reduced.
In the paper, it is expounded the application of frequency converter in crane of Rail and Beam Plant of Baotou Steel, features and functions of frequency converter, and the selection method of frequency converter for hoisting equipment is introduced. Frenquency converter is applied to crane to realize the soft start of crane and to reduce the impact on grid current. It not only reduces the impact on equipment, prolongs the service life of equipment, saves energy and makes speed regulation more safe and reliable, effectively reducing the production cost of enterprises.
This paper systematically analyzes the fault causes of Allison DP8963 type electro-hydraulic control automatic transmission such as no gear increase, low pressure and high oil temperature, summarizes the fault diagnosis method, and reduces the fault processing time, so as to increase the service rate of 3311E mining dump truck.
The essence of prestressed string method to repair bending of crane main bea is to use the steel strand to transform the steel structural girder into the prestressed string steel structural girder. It has advantages that the elastic strength amplitude of steel can be sufficiently and repeatedly utilized, thereby improving the bearing capacity of structure. Through more than four years practice after repair in Rail and Beam Plant of Baotou Steel, the application of this method is the good solution to solve the problem in bending of crane main bea, and provides technical support for repairing and recycling of bridge crane that exists girder bending defect, saving the cost of maintenance, restoring and enhancing crane performance and ensuring safety production.
With the rapid development of industrial technology and mine geological prospecting, the types of gas turbines are increasing, the power is getting bigger and bigger, and the functions are becoming more and more. Whether the operation of a mine car engine is normal or the service life is long or not depends not only on internal factors such as its structure and quality, but also on the proper and timely care and maintenance. The proper care and maintenance is an important link to prolong the service life of the mine car, reduce the economic loss and ensure the safety of driving.
According to slow tilting and difficult returning of tilting air cylinder in KF-60 automatic dumping car during winter operation, specifically from the tilting system structure and tilting work principle of the automatic dumping car, this paper analyzes the causes of slow tilting and difficult returning of tilting air cylinder in detail and puts forward some effective measures to improve the efficiency of tilting system in automatic dumping car.
According to the actual operation of boiler, this paper introduces the operation judgment analysis, handling techniques and prevention measures of grate failure after the fracturing and wearing of the driving wheel.
The belt conveying system is the main conveying mode for open pit mine to enter into deep mining stage. As an important part of belt conveying system, power and control system plays a crucial role in belt conveying system. Through the analysis of power supply system and automatic control system for belt conveying in the main stope of Baiyunebo Iron Mine, the feasible plan for power and control system of rock belt in main stope is ultimately determined.
With the gradually increasing implementary degree of national environmental protection policy, the requirements of mine environmental management are increasingly strict. This paper introduces the environmental management of Baiyunebo Iron Mine, and discusses the main points and development trend of mine environmental management.
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