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Nanchang, China

Shen L.,China Nerin Engineering Co. | Zhou K.,Central South University
Disaster Advances | Year: 2012

The study analyzes serious problems in mine development such as potential safety hazard and environment pollution caused by the tailings pond management system now a days in China, which directly impact our sustainable development of economy and society and put forward establishing nationwide guaranty funds system for safety and environment restoration and control of tailings pond to provide an effective guarantee for control of potential safety hazard of tailings pond as well as restoration and control of its surrounding environment. A preliminary approach is also made to system structure of collection standard and management of return of guaranty funds as well as implementation of acceptance criteria of restoration and control. Source

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. Source

Wei W.,China Nerin Engineering Co. | Yan G.-X.,Jilin Jien Nickel Industry Co.
World of Metallurgy - ERZMETALL | 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 furnaces have been used to handle concentrates of different metals, including copper, lead, tin and precious metals, a nickel concentrate TSL smelter did not exist before the operation of JJNI. As the characteristic of nickel concentrate and its smelting requirements are different from other metals, the engineers made many innovations in this project, such as improving the raw material handling device to avoid build-ups and corrosion, new furnace cooling system, new tap-hole arrangement, new measures to stabilize the offgas system, etc.This plant started its operation at the end of 2009 and reached its design feed rate 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. Source

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. Source

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. Source

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