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Source publication
Stamped charging of coal has become increasingly demanded in blast furnaces, as pulverized coal injection is more used. In the stamped charging process, the bulk density of the coal is the most important parameter, which affects the productivity and campaign life of the coke oven batteries. Hence, online measurement of coal bulk density is very cru...
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Context 1
... measuring pressure acts on the sidewall, a force sensor needs to be attached to the sidewall of the stamping machine. Hence, a sensor fixation arrangement was planned, as shown in Figure 3. ...
Citations
... Knowledge about the achieved coal cake density is crucial for the industrial production of coke in stamp-charged coke oven batteries. The importance of this parameter is also evidenced by attempts to measure the achieved density on an industrial scale with the use of various techniques, such as GPR (Ground Penetrating Radar), ultrasound or force sensors [13][14][15][16]. However, they have yet to be implemented on an industrial scale. ...
... The aforementioned phenomenon has an impact on th mechanical properties of the carbonaceous substance (structure flexibility, susceptibili to deformation). Coking coals with a lower degree of coalification (higher volatile matte content) are usually characterised by a lower grindability (HGI), which is related to th aforementioned changes in their structure [16]. The mechanical properties are also infl enced by the content and chemical composition of the mineral matter and the petr graphic composition [18,23]. ...
... The aforementioned phenomenon has an impact on the mechanical properties of the carbonaceous substance (structure flexibility, susceptibility to deformation). Coking coals with a lower degree of coalification (higher volatile matters content) are usually characterised by a lower grindability (HGI), which is related to the aforementioned changes in their structure [16]. The mechanical properties are also influenced by the content and chemical composition of the mineral matter and the petrographic composition [18,23]. ...
Coke-making technology utilises two systems for charging the coke oven chambers with coal—a stamp-charged system (stamp-charging) and a gravity charged system (top charging). The presented study examines the impact of selected coal properties on the effectivity of the stamping operation by measuring the bulk density of the obtained stamped coal cake. An empirical mathematical model was developed that allows the forecasting of the coal cake density based on the most frequently assessed coal parameters, such as volatile matter, ash, moisture and particle size parameters, as well as the stamping operation parameter—cumulative stamping energy. The obtained results showed that the density of the stamped coal cake increases with the increase in the stamping energy (53.3 kg/m3 increase, for increase in natural logarithm value of 1), RRSB specific coal particle diameter d′ (6.4 kg/m3 increase, for each 0.1 mm increase in d′), ash content (8.9 kg/m3 increase, for 1% point increase) and moisture content (4 kg/m3 increase, for 1% point increase), and decreases with the increase in volatile matter content (3.82 kg/m3 decrease, for 1% point increase).
