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| 1 | Effective removal of microcystins using carbon nanotubes embedded with bacteria显示文摘Adsorption of microcystins (MCs) by carbon nanotubes (CNTs) and clay materials was studied. Compared with various clays tested, CNTs showed a much stronger ability to adsorb MC-RR and LR that were two typical types of microcystins found in China. At initial 21.0 mg/L of MC-RR and 9.5 mg/L of MC-LR in solution, the adsorption amounts of MC-RR and LR by CNTs were 14.8 and 6.7 mg/g that were about five times higher than those by the clay ma-terials of sepiolite, kaolinite and talc, etc. In the presence of CNTs and the bacterial Ralstonia solanacearum that was firstly isolated and used for the biodegradation of MCs by the authors, a remarkable removal of MCs from water were observed. The mechanism was that CNTs could absorb large amount of both MCs and the embedded R. solanacearum so that, even when diluted by a large amount of water, the con-centrations of both organic pollutants and the added bacteria could be largely enhanced on the surface of CNTs where a concerted biodegradation reaction was effectively conducted. This finding could be important for the further development of practical techniques to eliminate MCs from polluted drinking waters. | YANHai PANGang ZOUHua LiXianliang CHENHao | 2004 | Chinese Science Bulletin2004，49，16： | 12 |
| 2 | Adsorption of zinc on manganite(γ-MnOOH): particle concentration effect and adsorption reversibility显示文摘The adsorption and desorption processes of Zn(Ⅱ) on γ-MnOOH as a function of particle concentrations(C p) were studied. An obvious C p effect was observed in this adsorption system. The degree of adsorption hysteresis increased greatly with the increasing of C p, indicating that the extent of the real metastable-equilibrium states deviating from the ideal equilibrium state was enhanced with the increasing of C p. The C p-reversibility relationship confirmed the metastable-equilibrium adsorption(MEA) inequality(Pan, 1998a), which was the core formulation of the MEA theory. Because the MEA inequality was based on the basic hypothesis of MEA theory that adsorption density Γ is not a state variable, the C p-reversibility relationship gave indirect evidence to the basic hypothesis of MEA theory. | QINYan-wen PANGang ZHANGMing-ming LIXian-liang | 2004 | Journal of Environmental Sciences2004，16，4： | 7 |
| 3 | A method to extract algae toxin of microcystin-LR显示文摘A simple and low-cost method to obtain cyanobacterial toxin microcystin-LR(MC-LR) was developed. A new strain of Microcystis aeruginosa, named DC-1, producing microcystin-LR but not microcystin-RR, was separated from the field blooming algae samples of Dianchi Lake, in southwest of China. Following three times’ freeze and thaw treatment, the cultivated DC-1 cells were extracted with 40% methanol in water. The extract was centrifuged and the supernatant applied to a Hydrophilic-Lipophilic Balance(HLB) SPE cartridge. Eluted impurities with a certain gradient from 30% to 50% methanol in water, MC-LR was finally eluted from the HLB cartridge with 60% methanol in water, and samples containing 3.85% to 14.8% of MC-LR were obtained. These MC-LR samples may be used in adsorption and biodegradation experiments instead of using expensive standard reagents. | ZHANGMing-ming PANGang YANHai CHENHao | 2004 | Journal of Environmental Sciences2004，16，4： | 3 |
| 4 | Quality Control for Continuously Cast Slab of High Strength Weathering Steel Q450NQR1显示文摘In order to reduce the transverse corner cracks of high strength weathering steel Q450NQR1,the factors influencing transverse corner cracks on continuously cast slab,such as level fluctuation of molten steel in mold,mold taper,primary cooling,mold powder,secondary cooling,nitrogen content in steel,spray nozzle structure,processing parameters and equipment of CC,etc.,were analyzed.Based on this,a series of comprehensive countermeasures have been proposed.The operation shows by the use of key technologies,including stabilizing steel level,optimizing the mold taper,weakening the primary cooling and the secondary cooling,reforming the mold powder,and adjusting spray nozzle structure,the transverse corner cracks on continuously cast slab have been significantly reduced,and the edge cracks on hot rolled sheet have been eliminated due to the transverse corner cracks.The qualified slabs are delivered to produce weathering cold forming sectional steel,whose yield strength is greater than 450MPa. | CHEN Yong,PAN Hong,WU Guo-rong (Material Research Department of PanGang Group Research Institute Co.Ltd.,Chengdu 611731,Sichuan,China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 3 |
| 5 | Study on LF Refining Slag and Slagging Regime of High-Aluminium Steel显示文摘During secondary refining of molten steel, reaction of steel-slag has great influence on the quality of steel. Taking high aluminium steel ([Al]≥0.8%) for instance, reaction control of 4[Al]+3(SiO2) = 2(Al2O3)+3[Si] was discussed by both thermodynamics calculation and industrial experiments. The results show that content of silicon increased sharply when content of SiO2 in slag exceeded 10%. In order to prevent the increment of silicon content and reoxidation for high aluminium steel, reasonable component range of LF refining slag is: %CaO/%Al2O3=1.6-1.9, %SiO2 <10. Results of the industrial experiments indicate that the CaO-Al2O3 based refining slag has strong ability of desulfurization and inclusion absorption. Average desulfurization rate is 80%, and T[O] reduces above 50% after refining, with the average sulfur content and T[O] about 0.0025% and 11×10-6,respectively, which can meet the requirements of secondary refining and obtain good castability of steel in continuous casting process. | ZENG Jian-hua1, ZHANG Min1, CHEN Yong1, HE Sheng-ping2, WANG Qian2 (1. PanGang Group Research Institute Co, Ltd, Chengdu 611731, Sichuan, China 2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 2 |
| 6 | How Can the Titanium Mining Sector Get in Sync with Titanium Dioxide Production?显示文摘1 Titanium ore reserves:large volumesbut lower quality ore China has 965 million tons of proven tita-nittm ore reserves today,accounting for morethan 60% of the world total,widely distrib-uted in | By Qin Dexi,Chongqing Titanium Industry Co.,Ltd.of Pangang Group | 2008 | China Chemical Reporter2008，，25： | 0 |
| 7 | The Development on 610MPa Grade Hot Rolled Sheet for Automobile Crossbeam in Pangang显示文摘In Pangang 1450 hot strip mill,the 610MPa grade hot rolled sheet with stable mechanical properties using for automobile crossbeam was developed by adopting Nb-V microalloying design,controlled rolling and cooling.The ranges of its yield strength,tensile strength,elongation are 510-645MPa,615-710MPa,and 22%-30%,respectively.The average yield strength tensile strength,elongation are 569MPa,652MPa,26%,respectively.The P610L steel which produced in Pangang with excellent low temperature impact toughness and forming property,can fully meet the requirements of users. | ZHANG Kai-hua,YE Xiao-yu,ZUO Jun,ZHANG Gong-ting (PanGang Group Research Institute Co.,Ltd.,Chengdu 611731,Sichuan,China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 0 |
| 8 | Control of Sulfur Content in the Production of Clean Steel in Panzhihua Steel显示文摘This article mainly introduced the process of clean steel with different ways in Panzhihua Steel based on high sulfur content hot metal. With the development and application of sulfur control technologies in hot metal pretreatment, converter steel-making and refining processes, Panzhihua Steel had achieved the production of clean steel such as 350km/h steel for high speed railway, electric steel, etc. | YANG Sen-xiang ( Panzhihua Steel & vanadium Co., Ltd., PanGang Group, Panzhihua 617060, S ichuan, China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 0 |
| 9 | Optimization and Application of Oxygen Lance Nozzle for 120 t Converter of Pangang显示文摘In order to meet the requirement of semi-steel making, the original nozzle was optimized by Vanadium-recoverying and Stee1-making Works of Pangang. And then every parameters of the oxygen lance were assessed according to industrial tests. Results show that, comparing with the original oxygen lance nozzle the new designed one has a better metallurgical effect, the average volume of oxygen and oxygen supply intensity were increased by 774m3/h and 0.19 m3/(t·min) respectively, oxygen consumption was reduced by 1.87m3/t, the blowing time was lowered by 56 seconds, a better dephosphorization effect was obtained by the new one. | CHEN Jun1, LIANG Xin-teng1, LIU Rong-di2, ZENG Jian-hua1 (1. Pangang Group research institute Co., L td. Chengdu 611731, Sichuan, China 2. Vnadium-recoverying and steel-making plant of Pangang, Panzhihua 617062, Sichuan, China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 0 |
| 10 | Study on Control Technology of Slag Composition for Low-Sulfur and Low-Oxygen Steel显示文摘In order to reduce the content of oxygen and sulfur in steel, and produce low-sulfur and low-oxygen steel, study on slag has been carried out. Refining slag system of CaO-SiO2-Al2O3 is put forward with the consideration of slag amount from converter, oxidizability of slag and activity of oxygen in molten steel. On this basis, refining slagging system for low-sulfur and low-oxygen steel has been developed combined with the modification of slag from converter and composition control of refining slag in LF treatment process. The results show that oxygen content is not more than 15×10-6, as well as sulfur content is as low as 0.005% in tube blank steel. And it achieves the production of low-sulfur and low-oxygen steel. | ZHANG Min, ZENG Jian-hua, PAN Hong (PanGang Group Research Institute Co Ltd, Chengdu 611731, Sichuan, China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 0 |
| 11 | Trial Production of Sulphurous Free-Cutting Gear Steel by Convert-Billet Continuous Casting Process显示文摘In consideration of the composition characteristics and quality requirements of sulphurous free-cutting gear steel, the rational measures of sulfur control, calcium treatment and key technologies of continuous casting process are applied in the development of a full-line operation of LD-Billet continuous casting on steelmaking with semi-steel, which suggests an economic production of the steel has been realized. Test results show that the average retrieval rate of sulphurous alloy in the process of RH treatment is 95.3% and sulfur content of products is stability. Otherwise, content of T[O] in casting billet is in the range of 11×10-6 ~ 18×10-6 with average value is 14.7×10-6.Based on this, the billets have good surface quality and internal quality. | CHEN Liang, CHEN Tian-ming, ZENG Jian-hua, CHEN Yong (Pangang Group Research Institute Co, Ltd, Chengdu 611731, Sichuan, China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 0 |
| 12 | Development of Ultra-Low Oxygen Automobile Gear Steel显示文摘In view of process conditions of Vanadium Recovery and Steelmaking Plant, PanGang Group Panzhihua steel and Vanadium Co.,Ltd., and on the basis of making choice of a reasonable deoxidization process, some measures have been taken to the development of automobile gear steel (20CrMoH) such as the pre-refining technology during converter tapping, 'white slag' refining in LF, RH Vacuum treatment, and even protective casting technology. Also different and suitable models of argon blowing from bottom of ladle were adopted in the platform after converter, LF refining and calcium treatment. Test results show that the high cleanness 20CrMoH gear steel slab with T[O] ≤15×10-6(The average T[O] is 11.8×10-6) could be obtained through all these measures. | CHEN Tian-ming1, YANG Su-bo1, ZHAO Ke-wen1,2, WANG Xin-hua2, ZENG Jian-hua1, CHEN Yong1, CHEN Liang1, PAN Hong1 (1. PanGang Group Research Institute Co., Ltd., Chengdu 611731, Sichuan, China 2. Metallurgy and Ecological Engineering School, University of Science and Technology Beijing, Beijing 100083, China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 0 |
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