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Li Y.,Kunming University of Science and Technology | Li Y.,Kunming Iron and Steel Group Co. | Wang H.,Kunming University of Science and Technology
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

The long-distance ore pipeline transportation is a new and high-tech industry, which is non-polluting, zero emissions, and in line with the strategy needs of national low-carbon economy and energy demand reduction. The long-distance ore transport needs multi-station pumping station transportation, however, the low concentration slurry that does not match the technological requirements, such as slurry head and so on. This paper designs a circulation mud system used in long-distance pipeline transportation, which solves the following issues: (1) the technical pool can't storage water during the period of cleaning mine, so can't meet the needs of non-suspension production; (2) slurry spot cool dry easy to bring serious environmental pollution; (3) the refined iron dug out from the process pool need transport to iron and steel industry, trucking transportation needs a huge costs. Experience has shown that the system effectively improve the production efficiency and propagate. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE). Source


Li Y.,Kunming University of Science and Technology | Li Y.,Kunming Iron and Steel Group Co. | Wang H.,Kunming University of Science and Technology
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

Long-distance pipeline transportation of iron ore is a very good method to solve the iron ore delivering outside, and also suitable for the western complicated terrain and convenient traffic. Before the pipeline transporting the slurry, you need a low concentration of slurry (slurry concentration of less than 68%) that is concentrated and then transport to the mixing tank to mix uniformly. There will be a small amount of selected birth to mine in the upper reaches of the production process, which resulting concentration of slurry concentrated pool is low, and thus it can not meet the requirements that we have set concentration of slurry concentration, so the slurry can not be sent to the mixing tank, and the production is affected ultimately. Therefore, this paper presents a method of circulatory system and slurry delivery to solve such problems. It has been proved in practice that the system effectively improve the production and generalization efficiently. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE). Source


Ren S.,Xian Jiaotong University | Zhang J.,Xian Jiaotong University | Kang W.,Xian Jiaotong University | Qu Y.,Kunming Iron and Steel Group Co.
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | Year: 2011

The stability of the equilibrium state of evolution without external excitation and the complex dynamics of forced oscillation due to sound propagation are discussed for a spherical micro-bubble in water. First, the stability of the equilibrium state of evolution without sound wave propagation was analyzed, and the corresponding type of the singular point was determined. Second, the shooting method was combined with the Poincaré map to obtain the fixed point for forced oscillation due to sound excitation. Third, the stability and bifurcation were examined with the Floquet theory. The results show that from viewpoint of nonlinear dynamics, the equilibrium state is a stable focus for a spherical micro-bubble evolution in water without external excitation. With the increase in sound frequency, the 1-period oscillation becomes unstable, and the oscillation behaves in a double-periodic manner, then in a quasi-periodic manner, and finally chaotically. Additionally, with the increase in the amplitude of the pressure fluctuation, the micro-bubble eventually oscillates chaotically via a series of period-doubling bifurcations. Source


Zhou Y.,Yunnan Academy of Applied Technology | Zhou Y.,Kunming Iron and Steel Group Co. | Wang Z.,Yunnan Academy of Applied Technology | Lai Y.,Yunnan Academy of Applied Technology | And 5 more authors.
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2014

This paper studies the process of developing and producing titanium plate with the 1725mm double stands steckel mill. The main production equipment, technological process and manufacturing technique control of the mill were discussed, as well as heating temperature, rolling temperature, deformation per pass, dimension control, shape control technology were discussed. Based on analysis and discussion, the rolling technical parameter were identified: heating temperature 900°C, finishing temperature 800°C, coiling temperature 620°C; Rolling width 1250 mm, roll curve 1500 mm, roll crown -0.16 mm; Except roller cooling water, mill descaling water, Frit water and laminar cooling water were closed in rolling process; Air cooling after rolling. Under the rolling process parameters of titanium plate's dimension, mechanical properties, microstructure, fracture morphology were emphatically analyzed. The results show that titanium plate produced by this technique has met with National standards. Source


Song N.,Chongqing University | Zhu Z.-Z.,Chongqing University | Yang Y.-H.,Chongqing University | Li Y.-H.,Chongqing University | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2014

In order to study the modification mechanism of high rank coal, the behaviour of a pulverized coal modifier(ZBS) developed by the authors to anthracite and meagre coal was studied, based on the plastic mechanism of coking and the principle of hydrogen supply, and using the XRD detection method and the elemental analysis detection method. The results show that ZBS modifier can increase the activity point by combining with hydrogen on the one hand, and on the other hand it can provide hydrogen atoms when the coals turn from macromolecular substances to metaphase in coking process. It is found from 200 kg coke oven tests that the best quality of coke is obtained with the condition of adding 5% anthracite, 6% meagre coal, 0.10% ZBS added together to the coal blends. Adding ZBS, anti-broken strength of coke(M40) increases by 4.40%, wear resistance strength(M10) reduces by 0.70%, coke reactivity index(CRI) decreases by 4.25%, strength after reaction(CSR) increases by 4.83%.The quality of coke obtained with adding ZBS is close to or even better than the production index of coke with coking coal. Source

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