Dry Granulation of Molten Blast Furnace Slag and Heat Recovery from Obtained Particles

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.

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Reactivity and performance of dry granulation blast furnace slag cement

Cement and Concrete Composites ◽

10.1016/j.cemconcomp.2018.10.008 ◽

2019 ◽

Vol 95 ◽

pp. 19-24 ◽

Cited By ~ 16

Author(s):

Junxiang Liu ◽

Qingbo Yu ◽

Zongliang Zuo ◽

Fan Yang ◽

Zhicheng Han ◽

...

Keyword(s):

Blast Furnace ◽

Blast Furnace Slag ◽

Slag Cement ◽

Dry Granulation ◽

And Performance ◽

Furnace Slag

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The effect of size distribution of slag particles obtained in dry granulation on blast furnace slag cement strength

Powder Technology ◽

10.1016/j.powtec.2019.11.115 ◽

2020 ◽

Vol 362 ◽

pp. 32-36 ◽

Cited By ~ 4

Author(s):

Junxiang Liu ◽

Qin Qin ◽

Qingbo Yu

Keyword(s):

Blast Furnace ◽

Size Distribution ◽

Blast Furnace Slag ◽

Slag Cement ◽

Dry Granulation ◽

Cement Strength ◽

Furnace Slag

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Feasibility Study for the System of Coal Gasification by Molten Blast Furnace Slag

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.2347 ◽

2010 ◽

Vol 97-101 ◽

pp. 2347-2351 ◽

Cited By ~ 6

Author(s):

Peng Li ◽

Qin Qin ◽

Qing Bo Yu ◽

Wen Ya Du

Keyword(s):

Blast Furnace ◽

Blast Furnace Slag ◽

Heat Recovery ◽

Coal Gasification ◽

Hot Water ◽

Environmental Benefits ◽

Sensible Heat ◽

Recovery System ◽

Heat Recovery System ◽

Furnace Slag

At present, molten blast furnace slag is quenched rapidly using a large amount of water to produce a glassy-granulated slag without any recovery of its much sensible heat, polluting water and atmosphere. To solve these problems, a new heat recovery system is proposed. This system consists of melting gasifier, the 2nd gasifier and boiler in order to achieve stepped energy using. The melting gasifier and the 2nd gasifier use the endothermic heat of gasification reaction instead of sensible heat to recover the energy of molten blast furnace slag. The possibility of the new heat recovery system is studied. The reactions in melting gasifier are studied using STA409PC thermal analyzer and HSC chemistry software. The economic and environmental benefits are calculated based on the heat and mass balances. The results indicate that this method is possible and better than conventional methods such as hot water or steam production. The molten BF slag acts as not only thermal media but also good catalyst. The efficiency of melting gasifier is high and without pollution. Besides, this method can bring huge economic and environmental benefits which are important to the survival and sustainable development of iron-steel enterprises.

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Method of Dry Granulation and Solidification of Molten Blast Furnace Slag

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.67.7_917 ◽

1981 ◽

Vol 67 (7) ◽

pp. 917-924 ◽

Cited By ~ 11

Author(s):

Mayumi YOSIIINAGA ◽

Koichi FUJI ◽

Tatsuhiko SHIGEMATSU ◽

Tetsuro NAKATA

Keyword(s):

Blast Furnace ◽

Blast Furnace Slag ◽

Dry Granulation ◽

Furnace Slag

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Numerical simulation analysis of rotary cup centrifugal blast furnace slag

MATEC Web of Conferences ◽

10.1051/matecconf/202235502011 ◽

2022 ◽

Vol 355 ◽

pp. 02011

Author(s):

Mengyuan Yang ◽

Jingfu Wang

Keyword(s):

Numerical Simulation ◽

Blast Furnace ◽

Liquid Film ◽

Blast Furnace Slag ◽

Molten Slag ◽

Rotation Speed ◽

Simulation Analysis ◽

Solid Particles ◽

Dry Granulation ◽

Furnace Slag

In the process of centrifugal dry granulation of blast furnace slag, the thickness of the liquid film at the outlet of the rotor will have a significant impact on the degree of crushing of the slag after leaving the rotor and the size of the solid particles formed. Therefore, this paper uses the VOF method to analyse the flow of molten slag inside the cup. The results have shown that the slag flow has a significant effect on the thickness of the liquid film and the linear relationship is obvious; the thickness of the liquid film decreases with the increase of the diameter of the rotary cup and the rotation speed, and the negative correlation with the diameter of the cup is more obvious; Secondly, as the depth of the cup increases, the thickness of the liquid film decreases first and then increases. The inclination angle of the cup wall has little effect on the thickness of the liquid film.

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