scholarly journals Effect of B2O3 on Slag-Metal Reaction between CaO-Al2O3-Based Mold Flux and High Aluminum Steel

2018 ◽  
Vol 37 (9-10) ◽  
pp. 981-985 ◽  
Author(s):  
Jiangling Li ◽  
Bowen Kong ◽  
Lijun Jiang ◽  
Dezhao Jia ◽  
Shan Ren ◽  
...  
Keyword(s):  
Reaction Time ◽  
Chemical Reaction ◽  
Steel Casting ◽  
Reaction Rate ◽  
Mold Flux ◽  
Aluminum Content ◽  
Early Stage ◽  
High Aluminum Steel ◽  
High Aluminum

AbstractThe effect of B2O3 on slag-metal reaction between CaO-Al2O3-based mold flux and high aluminum steel was investigated. The results showed that the addition of 5 % B2O3, the slag-metal reaction hardly occurred. When the content of B2O3 was increased, the reaction rate increased rapidly. This indicated if only considering the slag-metal reaction, it’s better for high aluminum steel casting if the addition content of B2O3 is less than 5%. The chemical reaction was greatly influenced by the reaction time. With higher content of aluminum ([Al]=0.1 %), the early stage of reaction was greatly affected by the reaction time, and furtherly, the influence was decreased. When the aluminum content was increased, the effect of [Al] on the slag-metal reaction was comparatively small in the initial 10 min, and the content of [B] was increased slightly. But when the reaction time increased to 1 hour, the slag-metal reaction acutely occurred, and the content of [B] increased rapidly.

Effects of the cooling rate on the crystallization behaviors of the CaO–Al2O3–B2O3–CaF2-based mold flux

CrystEngComm ◽  
2020 ◽  
Vol 22 (12) ◽  
pp. 2158-2165
Author(s):  
Jiangling Li ◽  
Feifei Lai ◽  
Wen Yao ◽  
Liwen Hu ◽  
Qingcai Liu
Keyword(s):  
High Temperature ◽  
Cooling Rate ◽  
Steel Casting ◽  
Mold Flux ◽  
Tube Furnace ◽  
Crystallization Behaviors ◽  
High Aluminum Steel ◽  
New Type ◽  
High Aluminum

The effects of the cooling rate on a new type CaO–Al2O3–B2O3–CaF2-based mold flux for high aluminum steel casting were investigated using CSLM and a high temperature tube furnace.

Evaluation of Mold Flux for Continuous Casting of High-Aluminum Steel

2016 ◽  
pp. 279-289 ◽  
Author(s):  
Wei Yan ◽  
Wei Yan ◽  
Alexander McLean ◽  
Yindong Yang ◽  
Weiqing Chen ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Mold Flux ◽  
High Aluminum Steel ◽  
High Aluminum

Kinetics of Microwave-Assisted Reduction of Manganese Oxide

2011 ◽  
Vol 239-242 ◽  
pp. 2286-2292 ◽  
Author(s):  
Hai Chuan Wang ◽  
Zhi You Liao ◽  
Yuan Chi Dong ◽  
Shi Jun Wang ◽  
Yun Zhou
Keyword(s):  
Reaction Time ◽  
Manganese Oxide ◽  
Chemical Reaction ◽  
Rate Constant ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Microwave Oven ◽  
Microwave Assisted ◽  
Kinetics Of

The reduction rates of manganese oxide by carbon and SiC was examined by heating MnO2-carbon and MnO2-SiC mixtures in a 7-kW industrial microwave oven. The results show that the rate of the reduction increased with the amount of carbon in MnO2-carbon mixture and with SiC in MnO2-SiC mixture. The rate of the MnO2 reduction by carbon was proportional to the reaction time, and that by SiC was proportional to 2/3 power of the reaction time. The reduction was found to be controlled by chemical reaction. The reaction rate constant of the reduction of MnO2kC increased with increasing the amount of carbon in the mixtures but kSiC decreased with increasing the amount of SiC in the mixtures.

scholarly journals Study on Reaction Performances and Applications of Mold Flux for High-Aluminum Steel

2016 ◽  
Vol 57 (1) ◽  
pp. 58-63 ◽  
Author(s):  
Ting Wu ◽  
Shengping He ◽  
Lilong Zhu ◽  
Qian Wang
Keyword(s):  
Mold Flux ◽  
High Aluminum Steel ◽  
High Aluminum

Direct observation of Fe-Al-Zn ternary intermetallic compound and its transformation during the early stage of hot-dip galvanizing

1993 ◽  
Vol 51 ◽  
pp. 1116-1117
Author(s):  
C. S. Lin ◽  
W. A. Chiou ◽  
M. Meshii
Keyword(s):  
Intermetallic Compound ◽  
Reaction Rate ◽  
Diffusion Rate ◽  
Early Stage ◽  
Zinc Bath ◽  
Steel Sheets ◽  
Direct Observations ◽  
Solid Iron ◽  
Iron And Zinc ◽  
Ternary Intermetallic Compound

The galvannealed steel sheets have received ever increased attention because of their excellent post-painting corrosion resistance and good weldability. However, its powdering and flaking tendency during press forming processes strongly impairs its performance. In order to optimize the properties of galvanneal coatings, it is critical to control the reaction rate between solid iron and molten zinc.In commercial galvannealing line, aluminum is added to zinc bath to retard the diffusion rate between iron and zinc by the formation of a thin layer of Al intermetallic compound on the surface of steel at initial hot-dip galvanizing. However, the form of this compound and its transformation are still speculated. In this paper, we report the direct observations of this compound and its transformation.The specimens were prepared in a hot-dip simulator in which the steel was galvanized in the zinc bath containing 0.14 wt% of Al at a temperature of 480 °C for 5 seconds and was quenched by liquid nitrogen.

Study on the Mold Slag with High Al2O3Content for High Aluminum Steel

PRICM ◽  
2013 ◽  
pp. 2231-2239
Author(s):  
Qiang Wang ◽  
Shengtao Qiu ◽  
Zhiling Tian ◽  
Guoling Zhu ◽  
Pei Zhao
Keyword(s):  
Mold Slag ◽  
High Aluminum Steel ◽  
High Aluminum

Investigation of the Kinetics of Sulfite Oxidation on by-Production Recovery Process in WFGD

2012 ◽  
Vol 610-613 ◽  
pp. 1980-1985 ◽  
Author(s):  
Hong Jian Xu ◽  
Shu Fang Wang ◽  
Wei Guo Pan ◽  
Rui Tang Guo
Keyword(s):  
Chemical Reaction ◽  
Oxidation Kinetics ◽  
Reaction Rate ◽  
Recovery Process ◽  
Orthogonal Test ◽  
Sulfite Oxidation ◽  
Air Ventilation ◽  
Kinetics Of

The limestone-lime washing technology is the most widely used WFGD process, which normally we adopt to control the discharge of SO2 caused by coal’s combustion. Through the research on the oxidation kinetics of sulfite in this paper, it is indicated that macroscopic chemical reaction which responses to rate of sulfite is 1/2. And the results of orthogonal test can be concluded that: to the extent influence of oxidization reaction rate, the influences of temperature is the most significant, and influences of stirred speed is nearly negligible. The optimized operation factors may be shown as that temperature is controlled at 40°C, air ventilation is at 88ml/min,pH is 4.5 and stir speed is 500 r/min.

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