Experimental Investigation on Reduction Kinetics of Stainless Steel-Making Slag in Iron Bath Smelting Reduction

2015 ◽  
pp. 281-287
Author(s):  
Bo Zhang ◽  
Jienan Liu ◽  
Yanfeng Yang ◽  
Luming Liu ◽  
Jiechao Liu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Reduction Kinetics ◽  
Smelting Reduction ◽  
Steel Making ◽  
Bath Smelting ◽  
Iron Bath ◽  
Kinetics Of

Experimental Investigation on Reduction Kinetics of Stainless Steel-Making Slag in Iron Bath Smelting Reduction

2013 ◽  
Vol 721 ◽  
pp. 164-168
Author(s):  
Bo Zhang ◽  
Shuai Niu ◽  
Wen Bin Chen ◽  
Wen Cai Li ◽  
Fa Tao Chen ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Reaction Rate ◽  
Steel Slag ◽  
Interface Reaction ◽  
Reduction Kinetics ◽  
Smelting Reduction ◽  
Stainless Steel Slag ◽  
Bath Smelting ◽  
Iron Bath ◽  
Kinetics Of

Reduction kinetics of stainless steel slag in iron bath smelting reduction was studied at the temperature of 1500°C ~ 1650°C. It was concluded that the reduction process consisted of two parts. That is to say smelting reduction was controlled by stainless steel slag melting initially and by interface reaction later. In order to increase smelting reaction rate, the melting point of slag should be decreased at the first stage and adjust the liquidity of slag at later stage. Smelting reaction rate will be accelerated by means of optimize the slag content. The optimal reduction result that all most all of the chromium in slag been recovered was obtained in temperature was 1500°C, basicity of slag was 1.0~1.2, the value of Al2O3+MgO was 25%.

scholarly journals Interaction mechanism between refractory and melts in iron bath smelting reduction process

2010 ◽  
Vol 46 (2) ◽  
pp. 131-140
Author(s):  
G.B. Qiu ◽  
Y. Xu
Keyword(s):  
Corrosion Rate ◽  
Molten Slag ◽  
Interaction Mechanism ◽  
Reduction Process ◽  
Immersion Test ◽  
Corrosion Mechanism ◽  
Smelting Reduction ◽  
Zirconia Refractory ◽  
Bath Smelting ◽  
Iron Bath

The corrosion behavior of three sorts of refractories based on alumina-graphite were studied by immersion tests. The melts included smelting reduction molten slag and corresponding carbon saturated molten iron. The influence of test temperature, FeO content in slag and specimen rotative velocity on the corrosion rate of refractories was examined. By means of SEM and EDS, the microstructure change of the refractories after immersion test in kinds of melts was studied. The morphology of the deteriorated layer showed the corrosion extent of refractories. With the addition of zirconia and titania into the refractories, the corrosion rate changed to some extent. The corrosion rate of three sorts of refractories increased dramatically with the increasing FeO content in smelting reduction slag. Compared with alumina-graphite refractory and alumina-graphite-zirconia refractory, alumina-graphite-titania refractory had stronger corrosion resistance in the smelting reduction conditions. By the results of SEM and EDS, the corrosion mechanism of refractories was developed.

Cr and Ni Recovery and Oxidational Dephosphorization of Stainless Steel Dust during the Iron-Bath Smelting Reduction Process

2014 ◽  
Vol 933 ◽  
pp. 32-37
Author(s):  
Shuai Niu ◽  
Yong Ren ◽  
Hua Zhang ◽  
Hui Long Fu ◽  
Xin Hong
Keyword(s):  
Stainless Steel ◽  
Phosphorus Content ◽  
Reduction Process ◽  
Hot Metal ◽  
Smelting Reduction ◽  
Yield Rate ◽  
Steel Dust ◽  
Iron Bath ◽  
The Cost ◽  
Dephosphorization Rate

According to the comprehensive utilization of 300 series and 400 series stainless steel dust (SSD), and the dephosphorization of the reclaimed Cr-Ni contained hot metal, an experimental method of smelting reduction in iron-bath and oxidational dephosphorization was studied. The result shows: The yield rate of Cr in 300SSDand 400SSDis 98.13% and 98.39% respectively, the yield rate of Ni is almost 100%; During the dephosphorization, through the BaO and CaO-BaO based dephosphorizer has a higher Dephosphorization rate, it can bring pollution problems and the cost is too high, however, under some circumstance when the requirement of phosphorus content is not critical, the CaO based dephosphorizer can also achieved the dephosphorization goal.

Research on the Thermodynamics and Kinetics of Chromium Ore Smelting Reduction Process for Producing Stainless Steel

2013 ◽  
Vol 401-403 ◽  
pp. 704-707
Author(s):  
Yan Liu ◽  
Mao Fa Jiang ◽  
De Yong Wang
Keyword(s):  
Stainless Steel ◽  
Kinetic Model ◽  
Reduction Process ◽  
Smelting Reduction ◽  
Thermodynamics And Kinetics ◽  
Chromium Ore ◽  
Dissolution Model ◽  
Direct Alloying ◽  
Future Work ◽  
Kinetics Of

For describing and resolving the process of chromium ore smelting reduction preferably, the research status on the thermodynamics and kinetics of chromium ore smelting reduction process was summarized, based on the introduction of the process for smelting stainless steel with hot metal in a converter. The existing problems for smelting stainless steel by chromium ore smelting reduction in a converter were also discussed and some suggestions were made for the future work. A lot of investigations about the thermodynamics and the reduction mechanisms of chromium ore have been done. However, the consistent view about the thermodynamic feasibility and the mechanism of smelting reduction has not been achieved, so the application of research results is limited. Little work about the reaction kinetic model for the production of stainless steel by chromium ore smelting reduction and direct alloying has been done. So the synthetic kinetic model including a dissolution model and a reduction model of chromium ore should be built to predict and control accurately the process.

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