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Gao Y.,Zhejiang University | Yang C.,Jilin Jien Nickel Industry Co.
Fenmo Yejin Jishu/Powder Metallurgy Technology | Year: 2015

The liquid carbonyl iron go through the evaporator by the pressure to form gas of carbonyl iron then go into the decomposer to produce all kinds of carbonyl iron powder. The control parameters of evaporator in the key equipment in the production process of carbonyl iron powder were mainly discussed. The control of liquid level transmitter of evaporator is particularly important. The running faults of liquid level transmitter in production process were analysed and corresponding solutions were found. ©, 2015, Beijing Research Institute of Powder Metallurgy. All right reserved. 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


Liu S.-X.,Jilin University | Zhou J.-F.,Jilin University | Wu J.-J.,Jilin University | Zeng Z.-F.,Jilin University | Wan H.-X.,Jilin Jien Nickel Industry Co.
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2010

In order to investigate the response of borehole radar to metal ore, finite difference time domain (FDTD) was applied to borehole radar forward modeling on metal ore detection. Numerous simulated results were obtained for different metal ore-body, such as spherical, planar, and a practical ore-body. Spherical ore-body exhibits hyperbolic curves in profile and exact position can be determined after migration processing. As the planar ore-body is penetrated by the borehole, direct wave is shifted and weakened, andreflection events extend upward and downward. However, when it is not penetrated by the borehole, reflection exhibits a linear characteristic. For the practical ore-body, different boreholes show different signal characters. Combing with the detection from three boreholes, we can deduce the shape of the ore-body, and judge that the ore-body has the characteristic of low-resistivity and high permittivity. Source


Tang S.,Jilin Jien Nickel Industry Co. | Lei F.,Jilin Jien Nickel Industry Co. | Huang Y.,Jilin Jien Nickel Industry Co. | Ding J.,Jilin Jien Nickel Industry Co. | Liu W.,Jilin Jien Nickel Industry Co.
Fenmo Yejin Jishu/Powder Metallurgy Technology | Year: 2014

Carbonyl iron powder produced by carbonyl process contains a few impurities like carbon, nitrogen and oxygen existing in the form of Fe3C, Fe4N and Fe3O4 respectively. In order to meet the special requirements, these carbonyl iron powder should be further purified. In this paper, continual dynamic reducing technology was carried out with a rotary kiln to study the hydrogen reducing effects under different conditions. The results show that under the optimum parameters of the pressure of 2 kPa and the reducing time of 5 h at the temperature between 340~400°C, the iron powder products possess high quality with the purity more than 99.5%, the impurity contents of carbon, nitrogen and oxygen are obviously decreased. Source

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