The technological calculation for synergistic system of BF slag waste heat recovery and carbon resources reduction

2014 ◽  
Vol 87 ◽  
pp. 185-190 ◽  
Author(s):  
Wenjun Duan ◽  
Qingbo Yu ◽  
Zongliang Zuo ◽  
Qin Qin ◽  
Peng Li ◽  
...  
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Bf Slag ◽  
Slag Waste ◽  
Technological Calculation

Research on characteristics and modelling estimation of molten BF slag viscosity in the process of slag waste heat recovery

2016 ◽  
Vol 43 (10) ◽  
pp. 730-738
Author(s):  
W. J. Duan ◽  
Q. B. Yu ◽  
J. X. Liu ◽  
K. Wang ◽  
H. Q. Xie ◽  
...  
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Slag Viscosity ◽  
Bf Slag ◽  
Slag Waste

The Experimental Study of Molten Blast Slag Dry Granulation

2011 ◽  
Vol 356-360 ◽  
pp. 1882-1885 ◽  
Author(s):  
Yang Min Zhou ◽  
Chao Li ◽  
Li Li Xu ◽  
Si Yi Luo ◽  
Chui Jie Yi
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Particle Diameter ◽  
Test Bed ◽  
Dry Granulation ◽  
Furnace Slag ◽  
Slag Waste

Based on the comprehensive experimental test-bed of blast furnace slag waste heat recovery, we study the impacts which are caused by the changes of the key parameters, such as blast furnace slag discharged temperature, the speed of the granulation device, on the particle diameter distribution and sphericity, so as to master the best operating parameters of the blast furnace slag dry granulation, and provide experimental basic materials for blast furnace slag waste heat recovery. The results show that: when the discharged temperature of the blast furnace slag is controlled in 1400°C～1450°C, and the speed of the granulation device is controlled above 2000r/min, the sphericity is better, and 80% of the particle’s diameter will be 2～5mm.

scholarly journals Combining theory and experiment analysis in molten BFS waste heat recovery integrated with coal gasification

2019 ◽  
Vol 118 ◽  
pp. 01045
Author(s):  
Wenjun Duan ◽  
Yunke Gao ◽  
Qingbo Yu ◽  
Zhimei Wang
Keyword(s):  
Blast Furnace Slag ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Coal Gasification ◽  
Molten Slag ◽  
Waste Heat ◽  
Coal Particles ◽  
Gasification Efficiency ◽  
Furnace Slag ◽  
Slag Waste

A novel method that a heat recovery system from blast furnace slag integrated with coal gasification reaction to generate syngas was proposed. The motion characteristic and critical velocity of the coal particles in the molten slag were estimated. Meanwhile, the effects of temperature and steam to coal ratio on coal gasification product distribution and gas characterization were discussed. The results showed that the coal particles (~75 μm) would break through the bondage of bubbles and transport into molten slag when the velocity of coal particles were above 4.20 m·s-1 and the diameter of bubbles were less 6 mm. There had higher gasification efficiency, gas yield production and H2 production by this method. The results suggested that the optimal conditions for slag waste heat recovery were achieved at 1623 K and steam to coal ratio of 2.0. Under these conditions, the gas yield and carbon conversion reached 133.48 mol·kg-1 and 97.81%, respectively. The proposed method enhanced the coal gasification efficiency and recovered the high quality of molten blast furnace slag waste heat effectively, and had important guidance for industrial manufacture.

scholarly journals Exergy analysis of the multi-stage slag waste heat recovery system

2020 ◽  
Vol 194 ◽  
pp. 01002
Author(s):  
Wenjun Duan ◽  
Xiaojun Lv ◽  
Zhimei Wang ◽  
Dan Zhao
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Exergy Efficiency ◽  
Exergy Loss ◽  
Waste Heat Recovery System ◽  
Multi Stage ◽  
Recovery System ◽  
Heat Recovery System ◽  
Slag Waste

Based on the black-box model, this paper analyzed the multi-stage slag waste heat recovery system. The exergy efficiency, the exergy loss coefficient and the exergy loss rate were adopted as evaluation indexes to investigate the energy consumption and the weakness of the system. Meanwhile, the performance of waste heat recovery was analyzed by comparing the comprehensive exergy efficiency between the system and other conventional waste heat recovery methods. The results showed that the comprehensive exergy efficiency of the system reached 75.75%, which was much higher than other methods, and the weakness of the system was the subsystem of waste heat boiler. In general, the system recovered the slag waste heat effectively and converted coal to clean syngas through gasification reaction, which had incredible potential in energy saving, emission reduction and consumption reduction.

Sign in / Sign up

Export Citation Format

Share Document