Latest ArticlesThis paper introduces the characteristics of universal mill, the production process of 60AT2 high speed turnout rail by universal rolling and the basic methods and parameters of pass design. It also briefly analyzes the pass design of asymmetrical section, the design of guide equipment and the pass design of straightening. Finally, the product quality of 60AT2 high speed turnout rail production is summarized and analyzed.
The bench deep-hole blasting is the main measure for open-pit mining. The blasting quality directly influences whether the subsequent mining, loading and the whole production technologies could be smooth, which is vital for completing the production and capital consumption. In the paper, the methods for reducing big rocks of blasting are discussed combining with the actual situations of productions in the East Stope of Baiyunebo Iron Mine to contribute ideas and exert efforts for reducing costs and increasing benefits.
In this paper, the BD2 break down rolling process of railway turnout rail in Rail and Beam Plant of Baotou Steel is simulated through finite element modelling (FEM), and the metal flow deformation in rolling process is analyzed as well. The results indicate that the B and C grooves exhibit larger deformation zone in their rail waists, while uniform deformation could be seen in A groove. The equivalent strain of rail waist is larger than that of rail head and base in each pass of BD2.
In this paper, the pass design of HW175 mm × 175 mm hot rolled H-beam is taken as an example to introduce the HW175 mm × 175 mm hot-rolled H-beam produced by X-H rolling method on the UEU reversible continuous rolling mill, the pass design method of finished rolling mill, the pass system selection and pass design method for break-down mill, selection of billet cross-section, as well as the pass design characteristics of producing HW175 mm × 175 mm hot-rolled H-beam by using special-shaped billet.
The quality and effects of controlled blasting at bank near slope of Baiyunebo Iron Mine are analyzed with the variance analysis of probability theory and orthogonal experimental design as well as the parameters of blasting hole pattern are further optimized. As a result, the frequency of blasting test has been reduced and the blasting effects are good, which provide the safe and reliable data for the subsequent controlled blasting with similar engineering geological conditions.
Based on field experiment, comparing the effect of different grading schemes for ore main road paving gravel material, the main causes of road life cycle are analyzed from the internal and external causes of mining road disease. The analysis process focuses on data collection and experimental comparison, combining with the relevant theory of highway engineering to determine the final optimization scheme.
In this paper, the HN1 000 mm × 300 mm H-beam that produced by Rail and Beam Plant of Baotou Steel is taken as an example to introduce the pass system selection, billet selection and pass design method in the process of large size H-beam design. It also introduces the characteristics of the HN1 000 × 300 H-beam pass design and expounds the rolling process.
In the paper, the actual production of Baiyunebo open-pit iron mine is taken as an example. Through its main stope car——implementation and production practice of belt conveyor system, it is estimated that the annual cost of rock transportation will be reduced about 26.44 million yuan in 2017. The results show that the belt conveyor system process will be the main mode of open pit mine into deep mining.
In this paper, the cross-section characteristics of 60TY1 turnout rail are analyzed, the pass system selection and pass design are carried out reasonably according to field equipment conditions. The original technical point of view is proved to be correct by the practical verification. The main production process is introduced, and the dimension control accuracy and mechanical property index of finished products are briefly introduced as well, which provide practical examples for technical exchange.
According to the design currently carried out in the main stope, the waste dump of rock belt conveyor system needs 687, 600 m2 land acquisition. In order to ensure the volume of the waste dump to meet the production demand conditions and to avoid the cost of land acquisition, the waste dump location of rock belt conveyor system in main stope is adjusted and studied. The research puts forward three kinds of schemes by different occupation of land on belt conveyor for rare earth dolomite. Finally, the location adjustment of waste dump within the boundaries of iron net fence is determined.
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