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Lei C.-P.,Huangshi Xinxing Pipes Co. | Zhang K.-N.,Xinxing Ductile Iron Pipes Co. | He X.-F.,Huangshi Xinxing Pipes Co.
Zhuzao/Foundry | Year: 2014

Aiming to ductile iron pipe fittings product interface type and the characteristic of the species diversity, in order to reduce the mold production costs, the mold design of pipe fittings was optimized, the mold was produced with the swap interface and assembling mode, the exchange of various form interface was achieved for the same specification pipe fitting product. By designing of the interchanging type assembled pattern, various specifications and varieties of pipe fittings were used flexibly, the mould production costs on the basis of the original save 40%-50%. Source


Zhao L.,Hebei University of Engineering | Li C.,Hebei University of Engineering | Zheng L.,Hebei University of Engineering | Wang L.,Xinxing Ductile Iron Pipes Co.
Advanced Materials Research | Year: 2013

The metallurgical composite bimetallic tube, Incoloy825/X60, has been manufactured by a novel centrifugal casting plus extrusion compound technique. Based on the Incoloy825/X60 bimetallic tube, the limiting inner pressure and stress distributions were investigated by the finite element analysis software ABAQUS. The results indicate that the pressure-resistant capacity of the metallurgical composite bimetallic tube is equivalent to the internal metal in elastic state while the limiting inner pressure is much larger than the single metal tube with the same sizes in plastic state. The pressure-resistant capacity of the metallurgical composite bimetallic tube has increased more than two times compared with the external metal tube because of the transition layer which has a complete metallurgical bonding. © (2013) Trans Tech Publications, Switzerland. Source


Guo M.-H.,University of Science and Technology Beijing | Pang Y.-S.,Xinxing Ductile Iron Pipes Co. | Liu J.-Y.,University of Science and Technology Beijing | Li Y.-X.,North China Institute of Aerospace Engineering
Zhuzao/Foundry | Year: 2013

Referring the practical production condition and the literatures about the bimetal pipe, the progress on the technology of preparing the cladding blank by centrifugal casting metallurgical melting technology and the process of extruding the cladding blank to form the bimetal pipe are reviewed. The superiorities, problems and the improving methods of the process are analyzed. Furthermore prospects of the applications and trends of the process are also involved. Source


Song Y.-Q.,Xinxing Ductile Iron Pipes Co. | Song Y.-Q.,University of Science and Technology Beijing | Li J.-S.,University of Science and Technology Beijing | Ding X.-M.,University of Science and Technology Beijing | And 2 more authors.
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | Year: 2011

Based on the characters of high-phosphorous oolitic hematite, the dephosphorization research was carried out with the method of coal-based direct reduction, and Hami coal was used in this experiment. The results show that it can get the iron fine with the lowest mass fraction of P 0.031% in the lab after the processes of coal-based direct reduction and magnetic separation. To get the results, it should insure the best reduction temperature and the proper amount of adding carbon (in this experiment, the best reduction temperature is 1250°C, the mass ratio of ore to coal is 1.25). The wet balls require the proper binary basicity(R≤0.8), and the proper ore size (the ore size is below 2 mm), and finally the reduction time is required to last until the balance of the reaction (50 min). Source


Yin Z.,University of Science and Technology Beijing | Li J.,University of Science and Technology Beijing | Tian D.,University of Science and Technology Beijing | Yang S.,University of Science and Technology Beijing | And 2 more authors.
Metalurgia International | Year: 2011

In order to exploit iron ore resources, a two-million-ton pellets production line will be built in India, using Indian hematite to pelletize. The experiments on the property performance of pelletizing with Indian hematite were carried out by simulating the grate-kiln pellet process in laboratory. The results show that the fine ore whose size less than 0.075mm should be over 65 in mass percent, after grinding, with the ratio of bentonite about 1%. Also, the process parameters of drying and preheating sections were determined by the orthogonal experiment in the micro-pellet roasting simulation system, which provide a reference for the design of the pellet production line in India. Source

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