Effect of Size Distribution of Coke Breeze on Sintering Performance

Abstract

Coke breeze is added as fuel in sintering process. The size distribution of coke breeze is one of the important factors, which plays an important role in achieving proper sintering process. Therefore, the effects of size distribution of coke breeze on sintering performance are investigated. Experimental results show that, in practical production, we should adjust the size distribution of coke breeze according to the different production strategy (aimed for best strength or highest productivity, or others). For example, aimed for sinter with maximum tumble strength, the size distribution of coke breeze should be 57.20% of −1 mm, 25.63% of 1–3 mm, 11.17% of 3–5 mm, and 6.00% of +5 mm. Then the tumble strength of sinter increases about 1.48%, production yield increases about 1.7%. Similarly, aimed for sinter with maximum productivity, the size distribution of coke breeze should be 47.22% of −1 mm, 23.10% of 1–3 mm, 28.68% of 3–5 mm, and 1.00% of +5 mm. For this case, the productivity increases 0.1 t m−2 h−1, the sintering speed increases 0.7 mm min−1, and the production yield increases 0.4%. There are two reasons for that sinter B (optimized by maximum tumble strength) has better sintering performances, they are as follows: (i) the effect of coke breeze size on the sintering temperature profile and (ii) pores distribution. The research results of present work could give a scientific guide to reasonably utilize fuel resources in practical sintering process.

Particle Size Distribution Models for Metallurgical Coke Grinding Products

“…Despite the abovementioned importance of coke particle size distribution (PSD), particle size control has not been studied enough. Many fine recycled particles from chipping in crushing processes or waste in the coke oven cause an overproduction of particulate matter and uncontrolled coke size distributions [11][12][13][14][15][16][17][18][19][20][21][22]. Poor coke without quality classification creates disturbances in the sinter plant and the blast furnace operation, producing excess dust, heat losses, inefficient reaction rates, and fluid flow obstruction.…”

“…This situation has driven environmental regulation to propose eliminating or partially substituting metallurgical coke in sinter production [8,13]. Various studies [14][15][16][17][18][19][20][21][22][23] have evaluated the effect of defined ranges of coke particle size in steelmaking performance as a means of process optimisation. The thickness of combustion zone, flame front, chemical reactions kinetics, and iron-bearing phase formation (hematite, magnetite, and gangue) are broadly affected by coke PSD in sinter and blast furnace plants [15][16][17].…”

Integrating site-specific environmental impact assessment in supplier selection: exemplary application to steel procurement

“…The secondary product blast furnace slag, for example as granulated blast furnace slag (GBFS), has a widespread application in various areas such as in the cement industry (Huang et al 2016) (Siddique 2014). Iron ore is agglomerated to sinter in the sintering plant (ps 2 ) using coke breeze as fuel (Zhou et al 2015). It can have a significant impact on the efficiency of the sintering process depending on the size distribution of coke particles.…”

Combustion Kinetics Characteristics of Solid Fuel in the Sintering Process

“…Since the experimental materials use two types of fuels with different combustion performances, it is necessary to optimize the VM and RPM. The expressions of DVM and DRPM are obtained by combining Equations ( 6)- (9),…”

“…Coke is made from natural bituminous coal heated between 950 • C and 1050 • C in an airless environment. It is the main fuel in the sintering site [9]. Previously, the research on sintering fuel combustion was mostly based on coke breeze [10,11].…”