Nanchang, China
Nanchang, China

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He J.,China Nerin Engineering Co.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2016

The stepped overloaded plants were needed to be built on a landslide slope for a tungsten mine. Four rows of anti-slide piles were proposed for the treatment of sliding mass as well as the foundation of intra-plant step retaining wall and plants. In this case, the dual function of load-bearing and anti-slide could be utilized for the load-bearing and anti-slide piles. The optimization design and treatment methods for landslide under stepped overloaded plants were presented. Based on the transmit-coefficient method, an approach of resistance distribution of multi-row load-bearing and anti-slide pile was proposed considering the upper plant loads. With this method, the distributions of multi-row piles at the tungsten ore plant were calculated, and then the optimized design of load-bearing and anti-slide piles were conducted. Finally, with the long-term monitoring data of the landslide and the calculation results from finite element method, the rationality of the proposed method for the resistance distribution of multi-row pile was validated, and the applicability of the optimized design method for landslide treatment was verified. According to the inadequacies of resistance distribution of multi-row load-bearing and anti-slide pile in the current specifications, corresponding supplementary suggestions were proposed in this paper. © 2016, Science Press. All right reserved.


Tang Y.,Central South University | Tang Y.,Yichun University | Gui W.,Central South University | Peng T.,Central South University | Ouyang W.,China Nerin Engineering Co.
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | Year: 2012

A new transformer fault diagnosis method based on reconstruction-based contribution (RBC) and grey relation entropy is proposed. After establishing the principal component analysis (PCA) model of dissolved gas-in-oil, based on the idea of fault reconstruction, the proposed method extracts the feature information of dissolved gas in oil through calculating RBCs and normalization. In order to overcome the shortcomings of original grey relation analysis, such as partial relation and information losing, the proposed method adopts grey relation entropy to carry out transformer fault diagnosis. Experimental results show that the proposed method has very good fault distinguishing ability and enhances fault diagnosis accuracy.


Tang Y.,Central South University | Tang Y.,Yichun University | Gui W.,Central South University | Peng T.,Central South University | Ouyang W.,China Nerin Engineering Co.
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | Year: 2013

Aiming at the problem that the input variable selection result is influenced by noise in the dissolved gas concentration prediction in transformer oil, a new prediction method of dissolved gas concentration in transformer oil based on improved normalized mutual information feature selection (INMIFS) and support vector regression machine is proposed. Firstly, the variables of the dissolved gas in transformer oil are reconstructed in the phase reconstruction space; and the independent component analysis is adopted to separate the signal from noise. Secondly, INMIFS method is proposed to select the input variables and reduce the influence of noise on mutual information variable selection; At last, the support vector regression machine is adopted as the predictor to forecast the dissolved gas concentration in transformer oil. Experiment results show that the improved normalized mutual information input variable selection results are consistent with the study results of mineral oil inferior thermal dynamics, and the proposed prediction method has good prediction accuracy and generalization ability.


Shang W.,China Nerin Engineering Co. | Huang Z.,Jiangxi University of Science and Technology | Wang Y.,Jiangxi University of Science and Technology
Procedia Engineering | Year: 2012

The effects of annealing temperature (600°C, 625°C, 650°C, 680°C) and aluminum content (1.5%, 2.0%, 2.5%) on the microstructures and mechanical properties of complex aluminum-brass were investigated. The results show that with the increase of Al content, the grains of Al-brass become finer, and the tensile strength increases, while the elongation decreases. The tensile strength and the elongation of Al-brass with 1.5% Al are ∼430MPa and 36%, respectively. However, the tensile strength and the elongation of Al-brass with 2.5% Al are 470MPa and 24%, respectively. The recrystallization temperature enhances with the increase of Al content. The recrystallization temperature of cold-rolled plate with 1.5% Al is about 625°C, while that of plate with 2.5% Al is about 680°C. © 2011 Published by Elsevier Ltd.


Wang J.-L.,Jiangxi University of Science and Technology | Wang J.-L.,Central South University | Zhang C.-F.,Central South University | Zhang W.-H.,China Nerin Engineering Co.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2012

Based on the principle of Gibbs free energy minimization, a thermodynamic model of the lead flash smelting equilibrium system, including crude lead, matte, slag and gas four phases, was built using element potential method. The equilibrium composition was calculated at the same burden composition, smelting temperature and oxygen enrichment through the semi-industrial test. The results show that the absolute error of the percent content of Pb in crude lead is 0.30, and its relative error is 0.30%; the absolute errors of the mass fraction of Pb, CaO and SiO 2 in slag are 2.00, 0.50 and 0.70 respectively, and the relative errors of them are 6.67%, 3.57% and 3.89%. It is proved that the model can wholly embody the lead flash smelting practice and can be applied to the thermodynamic research of the smelting process.


Ouyang W.,China Nerin Engineering Co. | Li W.,Jiangxi University of Science and Technology
Applied Mechanics and Materials | Year: 2013

Tailings pond is a high potential energy artificial debris flow dangerous source. Once break, it will bring great harmless. Plant the seepage pressure meter in tailing dam thin section and use lightning protection and intelligence power supply unit which can adapt to extreme weather conditions. The people in site duty room can obtain the real time data, which is acquired by data acquisition unit (MCU) and transmitted by GPRS wireless. The government administration departments and enterprise leaders can also very quickly and easily watch it through the Internet. It will provide a reliable guarantee for the normal operation of the mining enterprises. This project has a innovation point of high reliability distributed intelligent power device, which can adapt to extreme weather conditions. © (2013) Trans Tech Publications, Switzerland.


Wang H.,China Nerin Engineering Co. | Xu D.,China Nerin Engineering Co.
European Metallurgical Conference, EMC 2013 | Year: 2013

In the flashing smelting process of modern copper smelter, high grade molten copper matte is granulated by high pressure water jets. After a preliminary dewatering, wet copper matte with 4-6 % of water must be treated by the following 3 steps before flashing converting: (1) Grinding and drying; (2) Negative pressure conveying; (3) Positive pressure conveying (density conveying), which is the traditional process of the copper matte conveying system and widely applied in industry. Compared with similar smelters in the world nowadays, positive pressure conveying system is cancelled in this improvement, and hot gas is recycled. Investing and operating costs will be reduced significantly. This new technology has the advantages of simple process, easy operation and saving energy.


Wei W.,China Nerin Engineering Co. | Yan G.X.,China Nerin Engineering Co.
European Metallurgical Conference, EMC 2013 | Year: 2013

Jilin Jien Nickel Industry Co., Ltd (JJNI hereafter) is one of the first plants in the world using Ausmelt TSL Nickel sulphide concentrate smelting technology. Although TSL furnace have been used to handle concentrate of different type metals, including copper, lead, tin and precious metals, but no existing of nickel concentrate TSL smelter before the operation of JJNI. As the characteristic of nickel concentrate and its smelting requirements are different with other metals, the engineers made many innovations in this project, such as improve the raw material handling ability to avoid build-ups and corrosion, new furnace cooling system, new tap-hole arrangement, new measures to stabilize the offgas system, etc. This plant starts its operation at the end of 2009, and reaches its design feedrate after almost one year of trial production. This paper introduces in details the innovations made in the project, represents and analyses the problems occurred in the plant start-up period and operations afterwards, also describes the technical measures to solve those problems.


Tang Y.,Central South University | Tang Y.,Yichun University | Gui W.,Central South University | Ouyang W.,China Nerin Engineering Co.
Gaodianya Jishu/High Voltage Engineering | Year: 2012

In order to fully get the hidden fault feature information in the dissolved gas analysis (DGA) data, a new method of the transformer fault diagnosis based on relative reconstruction-based contribution (rRBC) is proposed. The reconstruction-based contribution (RBC) of variables are calculated based on the idea of fault reconstruction after establishing a principal component analysis (PCA) model of dissolved gas-in-oil. Then, considering the RBCs' comparability of each variable, the feature information of oil dissolved gas is extracted by calculating the relative RBCs and normalization. Finally, a hierarchical structure of transformer fault diagnosis model is built up, and due to the high information utilizing rate of the grey relation entropy (GRE), the synthesis GRE incidence order of the diagnosing pattern with standard patterns is computed to realize the fault analysis. The experimental results show that, compared with the features extracted by RBC-GRE and GRE, the proposed rRBC method increases the separability of data set and the classification accuracy.


PubMed | Fudan University, Tongji University, Harbin Engineering University and China Nerin Engineering Co.
Type: | Journal: Archaea (Vancouver, B.C.) | Year: 2017

Volatile fatty acids (VFAs) are preferred valuable resources, which can be produced from anaerobic digestion process. This study presents a novel technology using

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