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1. Hydrodynamic study impact effect between top blown jet and molten bath of 80 t convert | |||
LI Nan,CAO Lingling,LIU Qing,LIN Wenhui,GUO Weida,Ren Keshe | |||
Metallurgical Engineering 10 November 2017 | |||
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Abstract:Based on the similarity theory, the influence of the lance height, the gas flowrate and the holes of oxygen lance on the impact effects and mixing behavior in the molten bath were investigated by hydrodynamics experiment using 1:6 water model for 80 t basic oxygen furnace. The results show that the impact diameter, the penetration depth and the cavity shape index all increase with increasing gas flowrate. The optimal mixing time of the bath is 38 s by controlling the oxygen lance height at 138.55 mm. Under the same condition, the mixing effect of the 4-hole nozzle is better than that of the 5-hole nozzle. In addition, the quantitative relation between the dimensionless penetration depth and Fr\' is deducted. | |||
TO cite this article:LI Nan,CAO Lingling,LIU Qing, et al. Hydrodynamic study impact effect between top blown jet and molten bath of 80 t convert[OL].[10 November 2017] http://en.paper.edu.cn/en_releasepaper/content/4741983 |
2. Researches on sodium-modification of Hunyuan Ca-based bentonite by suspension method | |||
zhang yuanbo,chen liyong,li guanghui,li qian,jiang tao | |||
Metallurgical Engineering 15 June 2009 | |||
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Abstract:Being high dispersity, hydrophilic property and viscosity, bentonite is widely used in the pellet production. Hunyuan bentonite is one of large-type bentonite deposits in China, the reserve of which is more than 0.15 billion tons. However, it is a kind of typical Ca-bentonite (Ca-Bent), not completely utilized in the pellets presently. The sodium-modification of the Ca-bent is investigated by means of suspend liquid in this paper. To begin with, the process mineralogy of the sample is carried out, based on which, different factors (sodium agent and dosage, pulp density, sodium temperature and sodium time, etc.) affecting the sodium-modification are researched. The results show that the alkali coefficient K of modified bentonite is increased from 0.34 to 1.33, and the 2HWA, dilation and colloid index are respectively increased to 601%, 32.4mL/g and 87.6mL/(3g) under the optimal conditions of Na2CO3 dosage 3.0%, pulp density 20%, sodium temperature 55℃ and sodium time 0.5h. The XRD patterns of the bentonite before and after sodium-modification show the d(001) from 1.5539nm reduces to 1.2467nm, and 2θ(001) from 5.6875° increases to 7.0907°, indicating that the Hunyuan Ca-bent is effectively modified into Na-Bent. This investigation can provide a feasible route for the utilization of Hunyuan bentonite. | |||
TO cite this article:zhang yuanbo,chen liyong,li guanghui, et al. Researches on sodium-modification of Hunyuan Ca-based bentonite by suspension method[OL].[15 June 2009] http://en.paper.edu.cn/en_releasepaper/content/33155 |
3. Comprehensive Utilization of Metallurgical Dusts & Sludge with New Type Composite Binder (CB) | |||
Zhang Yuan-bo,Han Gui-hong | |||
Metallurgical Engineering 01 June 2009 | |||
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Abstract:Having poor hydrophilicity, metallurgical dusts & sludge are difficult to recycle. Aiming at producing metallic briquettes for iron-making, investigations on agglomeration of metallurgical dusts & sludge with CB and its reduction roasting are studied. CB consists of organic polymer, which can improve hydrophilicity of dusts & sludge. FT-IR spectrum indicates that composite binder contains a variety of active groups (-OH,-COOH). Using the wet-grinding process, CB dosage can be decreased to 1.4%. Composite binder has the role of catalytic reduction at high temperature. Compared bentonite with the composite binder, the TFe and metallization ratio of products are increased by 2-3%. Under the conditions of roasting temperature 1275℃, and time 20 min, roasted briquettes with TFe of 64.74% and metallization ratio of 85.66% could be obtained. The residual Zn and Pb content meet the demands of iron-making. | |||
TO cite this article:Zhang Yuan-bo,Han Gui-hong. Comprehensive Utilization of Metallurgical Dusts & Sludge with New Type Composite Binder (CB)[J]. |
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