Latest ArticlesIn view of the problems existing in the operation of 110 kV rod suspension composite insulators used in electric transmission lines, the structure of composite insulators is designed and optimized. Under the premise of meeting the requirements of specification and technical parameters, through changing the structure and size of composite insulator umbrella skirt, the hydrophobicity performance and anti-icing performance of the composite insulator are improved, and the anti-fouling and anti-pollution performance are further improved, which ensures the reliable and stable operation of electric transmission lines.
In the paper, it is designed the water-level detecting device for cable trench. Using the STM32F103Rx microprocessor and GPRS communication module, the automatic monitoring device for cable trench water inlet point is developed to monitor whether water entering the cable trench. Based on VS2010, the cable trench detecting system in the plant is developed, receiving the return path signal of detecting device, and when a cable trench occurs water entering, the system will provide alarm, notifying the maintenance personnel to deal with it in time, greatly reducing the occurrence of related accidents.
Battery shell steel is used for the production of steel battery shell. It is the precision cold-rolled product with high technology content and high requirements for quality, and has high speed, deep drawing, thinning drawing process and strict appearance quality requirements. In the paper, based on the characteristics of existing technical equipment, the scheme is established from composition design, structure property, manufacturing technique and other aspects, and the stability, thickness deviation and surface roughness for thin gauge rolling are dealed with. The actual product quality of trial products meets the customer's requirements completely, enriching the company's steel products range.
In the paper, based on the engineering geological conditions and mining scheme of E zone, the three-dimensional geological model is established for slope of E zone. Using FLAC3D finite difference software, numerical simulation is done for the whole process of excavation from the original surface to the 1 230 m platform of pit bottom. It is analyzed from three aspects of stress field, displacement field and plastic zone, so as to predict the stability and stability development situation for slope of E zone during the process of continuous excavation to the pit bottom, which provides a more reasonable basis of the precaution and the design of treatment scheme for the lower excavation slope.
According to the numerical simulation analysis, the potential failure area and failure mode of slope at the present stage are judged. Combined with the development trend of stability deformation in the subsequent excavation, the governance area and governance scheme for the slope at the present stage are determined, and through the numerical simulation method, the governance scheme is designed and verified.
Based on the theory of mechanical design, after theoretical calculation, combined with actual situation of the site, through a series of optimization and modification for car dumper system, the failure rate of car dumper system is reduced and the turnover efficiency is improved. The practice shows that the transformed car dumper system can be more stable and efficient.
In the paper, it is mainly discussed the improvement of mixture water feeding and wetting method, which helps to improve the pelletizing speed and pelletizing efficiency of mixture, improve the breathability of material layer, and significantly improve the quality of sinter mineral.
In the paper, it is introduced the process of gradual development of distributor with independent intellectual property by Baotou Steel and its application in large blast furnace in recent years, and aiming at the failure of the distributor in large blast furnace under the special furnace condition of Baotou Steel, the measures for improving the center throat pipe and bracket of distributor are improved, which improves the application capacity of distributor in Baotou Steel.
The fracture of throat protection plate and the furnace top sealing cover spray coating off in No.7 blast furnace of Baotou Steel are usually required for repair in a 10-day period. In order to save time meanwhile without furnace cooling down, a series of special measures such as burden distribution, forced ventilation, positive pressure respirator are taken to work into the furnace under harsh environment with high temperature and gas, which saves time, creats high efficiency and creats a new thought for the blast furnace maintenance.
The effect of different parameters of final electromagnetic stirring (F-EMS) on equiaxial crystal ratio and carbon segregation index in the center of Φ270 mm section slab is tested and analyzed. The result shows that during the continuous casting of medium carbon steel, the final electromagnetic stirring parameter is 300 A/10 Hz, so that the center equiaxial crystal ratio of the billet is more than 35%, and the central carbon segregation index of the billet is less than 1.05.
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