scholarly journals Phase Transformation of Cohesive Zone in a Water-quenched Blast Furnace

2018 ◽  
Vol 58 (10) ◽  
pp. 1775-1780 ◽  
Author(s):  
Xiaoyue Fan ◽  
Kexin Jiao ◽  
Jianliang Zhang ◽  
Kaidi Wang ◽  
Zhiyu Chang
Keyword(s):  
Phase Transformation ◽  
Blast Furnace ◽  
Cohesive Zone

scholarly journals Phase Transformation of Kaolin-Ground Granulated Blast Furnace Slag from Geopolymerization to Sintering Process

2021 ◽  
Vol 7 (3) ◽  
pp. 32
Author(s):  
Noorina Hidayu Jamil ◽  
Mohd. Mustafa Al Bakri Abdullah ◽  
Faizul Che Pa ◽  
Mohamad Hasmaliza ◽  
Wan Mohd Arif W. Ibrahim ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Room Temperature ◽  
Curing Temperature ◽  
Curing Process ◽  
Sintering Process ◽  
Granulated Blast Furnace Slag ◽  
Fluxing Agent ◽  
Furnace Slag

The main objective of this research was to investigate the influence of curing temperature on the phase transformation, mechanical properties, and microstructure of the as-cured and sintered kaolin-ground granulated blast furnace slag (GGBS) geopolymer. The curing temperature was varied, giving four different conditions; namely: Room temperature, 40, 60, and 80 °C. The kaolin-GGBS geopolymer was prepared, with a mixture of NaOH (8 M) and sodium silicate. The samples were cured for 14 days and sintered afterwards using the same sintering profile for all of the samples. The sintered kaolin-GGBS geopolymer that underwent the curing process at the temperature of 60 °C featured the highest strength value: 8.90 MPa, and a densified microstructure, compared with the other samples. The contribution of the Na2O in the geopolymerization process was as a self-fluxing agent for the production of the geopolymer ceramic at low temperatures.

Assessing the Gas Permeability of the Cohesive Zone in the Blast Furnace

2019 ◽  
Vol 49 (3) ◽  
pp. 179-184
Author(s):  
A. V. Kuzin ◽  
N. S. Khlaponin
Keyword(s):  
Blast Furnace ◽  
Cohesive Zone ◽  
Gas Permeability

scholarly journals Microstructure Change and Primary Slag Melting of Sinter in the Cohesive Zone of a Blast Furnace

2015 ◽  
Vol 55 (6) ◽  
pp. 1223-1231 ◽  
Author(s):  
Miyuki Hayashi ◽  
Kyohei Suzuki ◽  
Yasuhiro Maeda ◽  
Takashi Watanabe
Keyword(s):  
Blast Furnace ◽  
Cohesive Zone ◽  
Microstructure Change ◽  
Slag Melting

scholarly journals Modeling of Blast Furnace with Layered Cohesive Zone

2010 ◽  
Vol 41 (2) ◽  
pp. 330-349 ◽  
Author(s):  
X.F. Dong ◽  
A.B. Yu ◽  
S.J. Chew ◽  
P. Zulli
Keyword(s):  
Blast Furnace ◽  
Cohesive Zone

Melting Features and Viscosity of TiO2-Containing Primary Slag in a Blast Furnace

2018 ◽  
Vol 37 (2) ◽  
pp. 149-156 ◽  
Author(s):  
Kexin Jiao ◽  
Jianliang Zhang ◽  
Zhiyu Wang ◽  
Yanxiang Liu ◽  
RenZe Xu
Keyword(s):  
Blast Furnace ◽  
High Temperature ◽  
Low Temperature ◽  
Cohesive Zone ◽  
Solid Phase ◽  
Slag System ◽  
Silicate Network ◽  
Network Modifier ◽  
Blast Furnace Ironmaking ◽  
Ironmaking Process

AbstractThe performance of the primary slag in the cohesive zone of blast furnace is critical for smooth operation of blast furnace ironmaking process. In the present work, the CaO–SiO2–MgO–TiO2–Al2O3–FeO slag system was studied to identify the influence of the FeO and the TiO2 on the melting features and viscosity. The temperatures of melting features are found to decrease with increasing FeO from 5 wt% to 20 wt% and increase with increasing TiO2 from 5 wt% to 15 wt%. The viscosities of the slag change with TiO2 can be divided into four periods, which are slow period, rapid period, slow down period and dramatically rise period. The introduction of TiO2 into silicate network performs as network modifier at high temperature and network former at a relative low temperature. FeO can decrease the effect of Ti2O64– chain units and decrease the precipitation temperature of the solid phase.

scholarly journals Effect of Roasting Temperature on Phase Transformation in Co-Reduction Roasting of Nickel Slag

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 550
Author(s):  
Yunye Cao ◽  
Chengyan Xu ◽  
Yuechao Tian ◽  
Yanqing Hou
Keyword(s):  
Phase Transformation ◽  
Blast Furnace ◽  
Metallurgical Industry ◽  
Chain Structure ◽  
Original Structure ◽  
Reduction Roasting ◽  
Mineral Phase ◽  
Blast Furnace Dust ◽  
Roasting Temperature ◽  
Co Reduction

Nickel slag and blast furnace dust comprise a large part of solid waste produced by the metallurgical industry. In this study, a novel method of co-reduction roasting followed by grinding/magnetic separation was proposed to collaboratively reutilize nickel slag and blast furnace dust. The nickel slag was combined with blast furnace dust to produce a Ni-Fe alloy containing Cu component by using the proposed method. In addition, the blast furnace dust acted not only as a reductant but also as an Fe resource. Results in this work showed that 81.62% Fe and 89% Ni could be recovered from nickel slag and blast furnace dust, and a Ni-Fe alloy product with 93.03 wt% Fe, 0.86 wt% Ni, and 0.49 wt% Cu could be obtained under optimal conditions in this study. The effect of roasting temperature on phase transformation was characterized and analyzed by XRD and SEM-EDS. The results illustrated that roasting temperature was considered as the main influence to regulate the mineral phase transformation and microstructural change in roasted product. The minerals in the nickel slag finally transformed iron and augite from fayalite containing magnesium and magnetite after the disappearance/transformation of the mineral phase. The Fe-bearing minerals were first reduced in situ position of structure into metallic Fe particles and then grown into a Ni-Fe alloy with Cu of chain structure. The new structure, instead of the original structure, formed the homogeneous slag phase and Ni-Fe alloy with Cu component.

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