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Tangshan, China

Bai L.M.,Hebei Polytechnic University | Zhang S.M.,Shougang Mining Company | Zhang D.Y.,Shougang Mining Company | Dai S.J.,Hebei Polytechnic University | Li M.,Hebei Polytechnic University
Advanced Materials Research | Year: 2013

In order to improve the separating index of ilmenite to separate the concentrate by high intensity magnetic separation, the Heishan iron ore in Chengde did some work. Separate the sulfide ore out by flotation under the conditions of concentration by weight in feed 32%, consumption of xanthate 200g/t and 2# oil 40g/t. Use sulfate to adjust the pH of the low sulphur product of flotation, the mixture of EM351-2 and EM351-3 as foaming agent, after one roughinging and four fold concentrating, got the final titanium concentrate, the grade of which is 47.23%, and the recovery is 58.29%. During the procedure of roughing, the consumption of the reagent as follows: sulfate 2kg/t, EM351-3 1kg/t, EM351-2 900g/t. The consumption of sulfate during fourfold concentrating is 1kg/t. The index is more stable when the concentration in feed is 18%~26% during flotation. The index is stable during the continuous 26 work time for the process under this reagent system. The screen analysis of the flotation concentrate indicates that this reagent system has a better effect on the flotation of +0.074mm particles, and a bad effect on the flotation of -0.045mm particles. © (2013) Trans Tech Publications, Switzerland. Source


Liu L.,Tsinghua National Laboratory for Information Sciences and Technology | Li Y.,Tsinghua National Laboratory for Information Sciences and Technology | Zhang Z.,Tsinghua National Laboratory for Information Sciences and Technology | Feng Z.,Tsinghua National Laboratory for Information Sciences and Technology | And 2 more authors.
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) | Year: 2013

Experiment on channel propagation characteristic in underground iron mine was reported in this paper. Our work was carried out by CC1110-based Wireless Sensor Networks (WSN). The measured data verifies robustness and reliability of the system, which highlights the potential of underground personnel positioning system consisting of WSN-based backbone architecture. © 2013 IEEE. Source


Deng C.,Tsinghua National Laboratory for Information Sciences and Technology | Li Y.,Tsinghua National Laboratory for Information Sciences and Technology | Feng Z.,Tsinghua National Laboratory for Information Sciences and Technology | Li W.,Shougang Mining Company | Zhang D.,Shougang Mining Company
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) | Year: 2013

A novel dual-band circularly-polarized (CP) stacked patch antenna is presented in this paper. The antenna consists of two layers of FR4 substrates separated by an air gap. The dual-band circular polarization is achieved from aperture-coupled elements by a rotated square patch and a circular patch, which are etched on the top and bottom sides of the upper substrate. Computed results show that the -10 dB reflection coefficient bandwidths are 15.4% centered at 2.18 GHz and 14.2% centered at 2.5 GHz, respectively. The 3 dB axial-ratio (AR) bandwidths are 2.75% and 2.6%, which are within the reflection coefficient bandwidths. The frequency ratio of dual bands is 1.148. © 2013 IEEE. Source


Li H.-G.,University of Science and Technology Beijing | Li H.-G.,Shougang Mining Company | Zhang J.-L.,University of Science and Technology Beijing | Pei Y.-D.,Shougang Institute of Technology | And 2 more authors.
Journal of Iron and Steel Research International | Year: 2011

The whole melting curve of iron ore during sintering process was obtained, and the melting characteristics of iron ore were defined and explained. The whole melting process of mixture, mixed by iron ore and CaO reagent at basicity of 2.0 and 4.0, respectively, was observed using a SiC heating furnace with camcorder unit, and the melting curves of mixture that were relative height vs temperature curves were obtained. Besides, the melting characteristics of iron ore during sintering were introduced through defining some points in the melting curves, such as liquid forming temperature, inflexion temperature and flowing temperature, and the meaning of different shapes of the melting curves was clarified. © 2011 Central Iron and Steel Research Institute. Source


Zhao Z.-X.,Shougang Institute of Technology | Pei Y.-D.,Shougang Institute of Technology | Pan W.,Shougang Institute of Technology | Pan W.,University of Science and Technology Beijing | And 3 more authors.
Kang T'ieh/Iron and Steel (Peking) | Year: 2010

The high temperature properties of iron ore, such as assimilation, liquid phase fluidity, can reflect behaviours at high temperature during sintering, compared with the normal temperature properties of iron ore, so the high temperature properties of iron ore are significant for optimizing ore sintering matching. High temperature properties of ores used in Shougang since 2000 were measured, compared and analyzed, with results showing that combined water of ore promotes the assimilation of ore, and ore with high SiO 2 content has high liquid phase fluidity under the same basicity, on the condition that CaO addition is no more than CaO amount according to eutectic temperature in CaO-Fe 2O 3. Source

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