Experimental study of rotating dry slag granulation unit: Operating regimes, particle size analysis and scale up

Dhirhi, Ravindra; Prasad, Kali; Shukla, Ajay Kumar; Sarkar, Sabita; Renganathan, T.; Pushpavanam, S.; Kaza, Marutiram

doi:10.1016/j.applthermaleng.2016.07.049

Cited by 45 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The BFS granules employed in the experiments were wide-sieved granules produced via centrifugal granulation, shown in Figure 1(a). The mass fraction corresponding to the granule diameter exhibited a lognormal distribution pattern, consistent with the findings of Dhirhi's study [17]. The remaining experimental parameters are presented in Table 1.…”

Section: Methodssupporting

confidence: 88%

Exergy transfer characteristics and structural parameters optimization in blast furnace slag heat recovery device

Tao,

Yu,

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Thermodynamic analysis was employed to evaluate an MBHE (moving bed heat exchanger) for heat recovery from BFS (blast furnace slag). The study conducted experimental investigations to assess the influence of several factors on heat transfer, exergy transfer, and exergy destruction, including the granular side Peclet number, waterside Reynolds number, arrangement, tube spacing, and tube shape. Structural parameters of the MBHE were optimized based on the heat transfer enhancement number, resulting in the determination of the optimal parameters: staggered arrangement, Dh/D=2, Dv/D=3, and elliptical tubes.

show abstract

Section: Methodssupporting

confidence: 88%

Exergy transfer characteristics and structural parameters optimization in blast furnace slag heat recovery device

Tao,

Yu,

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Moreover, some phase change liquids with low temperature were adopted as working medium by researchers to analogously study the centrifugal granulation characteristics of molten BF slag. The rosin/paraffin mixture was utilized as working medium by Zhu et al, [ 14 ] Dhirhi et al, [ 15 ] and Peng et al. [ 16,17 ] They found that both the increase in rotating speed and the decrease in liquid volume flow rate all resulted in the decrease in obtained particles diameter.…”

Section: Introductionmentioning

confidence: 99%

A Novel Stacked Rotary Cup Atomizer Toward Efficient Centrifugal Granulation of Molten Blast Furnace Slag

Tan

Zhu

Wang

et al. 2021

steel research int.

View full text Add to dashboard Cite

Atomizer is one of the most important facilities in molten slag centrifugal granulation heat recovery system, which concerns the heat recovery rate of the system as well as the quality of slag particles. Aim to large slag flow rate in industrial application, a novel stacked rotary cup atomizer (SRCA) is proposed to achieve high‐quality centrifugal granulation performance. The authentic molten slag is adopted as working medium and the centrifugal granulation phenomena are visually investigated including the molten slag fragmentation on the surface of atomizer and the impacting of slag droplets on the water cooled wall. A film perforation fragmentation mode is found in the experiments under high slag flow rate. The granulated particle size distribution, average particle size, and slagging mass fraction produced by the atomizer are obtained. Moreover, the granulation performances of the SRCA with divergent structures are tested. The results demonstrate that the SRCA has excellent granulation performance in large slag flow rate to produce smaller particles and suppress slagging. Comparing with the typical rotary cup atomizer, the largest decrement in average particle size and slagging mass fraction for the SRCA is ascertained as 28.1% and 71.1%, respectively.

show abstract

“…Nowadays, the requirements of low carbon and environmental protection on the construction industry have prompted great motivations to seek alternative materials to cement since the emission of about 7% global CO 2 , the consumption of 5% global primary industrial energy, and the release of large amounts of NO x , SO 2 , particulate matter, mercury, and other compounds attributed to the cement production [1][2][3]. One of the promising strategies is the substitution of cement by low-carbon pozzolanic mineral admixtures, i.e., ground granulated blast furnace slag (GGBS) [4], a by-product from blast furnaces during the production of pig iron [5,6]. GGBS containing calcium silicoaluminate as its major component is highly vitreous in phases and is reactive to hydroxides released from the cement self-hydration to yield hydration products, i.e., CSH gel and hydrocalcium aluminate [7,8].…”

Section: Introductionmentioning

confidence: 99%

Ecological Upgrade of Normal‐Strength Mortars by Using High Volume of GGBS

Chen

Wang

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

Normal-strength concrete is widely used in construction sites considering the cost, technology, and structural safety. The ecological upgrade of such materials is more meaningful for the sustainable development in a greener way. To this end, the feasibility of ecological upgrade of normal-strength mortars (NSM) by using high volume of ground granulated blast furnace slag (GGBS) (70%–90%) was evaluated in this paper. Comprehensive experiments were conducted to investigate the influences of experimental variables such as content of cement, curing temperature, and mass ratio of water to binder (w/b) on the fresh properties, compressive strength, hydration products, microstructure, and pore structure of NSM. Ecoefficiency evaluation was conducted based on the energy requirement for the whole production of cement and GGBS. Experimental results showed that ecological upgrade of NSM was viable and feasible. When substituting 70% to 90% cement by GGBS, the energy requirement of 1 t binder can be accordingly saved by 67% to 86%, and the performance energy can be reduced from 25.4 (kWh/t)/MPa to 6 to 8 (kWh/t)/MPa. With proper contents of GGBS (70% or 75%), the 28 d compressive strengths were acceptable with reductions less than 10%. Evaluated curing temperatures and decreased w/b were viable methods to promote the early-age compressive strength of NSM incorporating high volume of GGBS. For instance, raising the curing temperature to 40°C can help achieve higher early-age compressive strength than that of the control group. In addition, the pore sizes within ZII (<100 nm) of GGBS-incorporated NSM were refined by over 20 nm.

show abstract

Experimental study of rotating dry slag granulation unit: Operating regimes, particle size analysis and scale up

Cited by 45 publications

References 21 publications

Exergy transfer characteristics and structural parameters optimization in blast furnace slag heat recovery device

Exergy transfer characteristics and structural parameters optimization in blast furnace slag heat recovery device

A Novel Stacked Rotary Cup Atomizer Toward Efficient Centrifugal Granulation of Molten Blast Furnace Slag

Ecological Upgrade of Normal‐Strength Mortars by Using High Volume of GGBS

Contact Info

Product

Resources

About