Analytical Research on Waste Heat Recovery and Utilization of China's Iron &amp; Steel Industry

Ma, Guangyu; Cai, Jiuju; Zeng, Wen-wei; Dong, Hua

doi:10.1016/j.egypro.2011.12.1049

Cited by 53 publications

(37 citation statements)

References 2 publications

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“…The waste heat available for recovering derived during the analysis is relatively low and does not exceed 1% of maximum thermal output of the boiler, which is reflected in the considerations presented in [9].…”

Section: Discussionmentioning

confidence: 86%

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Technical Aspects and Energy Effects of Waste Heat Recovery from District Heating Boiler Slag

et al. 2018

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Coal continues to dominate in the structure of the heat production system in some European countries. Coal-fired boilers in district heating and power generation systems are accompanied by the formation of large quantities of slag and ash. Due to considerable high temperature, slag may be used as a source of waste energy. In this study, the technical possibilities of recovery slag's physical enthalpy from grate-fired district heating boiler of 45 MW thermal capacity are analyzed. The aim of the work is to estimate the waste energy potential of the slag in analyzed boiler and proposition of the heat recovery system. The construction and design of the existing deslagging system was examined. Studies have shown that high water temperature accelerates system wear. Recovering heat from this system decreases the water temperature, which extends the trouble-free working time. The slag parameters were determined, including the temperature at the outlet of the boiler and the temperature after leaving the slag water tub. The annual amount of heat regenerative potential was estimated. On the basis of the research, the authors propose a waste heat recovery facility with high temperature R134a heat pump system. The result of the conducted research is that the proposed heat pump provides energy savings that are worth considering by recovering from 58.8% to 88.0% of energy slag potential.

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Section: Discussionmentioning

confidence: 86%

“…G s -slag flux, kg/s h s -specific physical enthalpy of the slag, kJ/kg c p,s -specific heat of the slag, assumed as 1 kJ/kgK [9,27] t s -slag temperature, • C.…”

Section: Problem Formulation Methods and Input Datamentioning

confidence: 99%

Technical Aspects and Energy Effects of Waste Heat Recovery from District Heating Boiler Slag

et al. 2018

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“…In 2012, China produced 60% of global pig iron production and 46% of global crude steel production (USGS, 2014b). Iron and steel production is one of the largest energy sectors in China, with energy consumption accounting for 10--15% of the total energy use and 15--20% of the total industrial energy use (Ma et al, 2012). In addition, more than 96% of energy input in China's iron and steel sector comes from fuel, including coke, washed coal, and raw coal.…”

Section: Iron and Steel Sectormentioning

confidence: 99%

“…The energy efficiency of China's iron and steel sector has improved over the last ten years while production has increased at a rapid rate. But the specific energy consumption of iron and steel sector is still 20% higher than international advanced levels (Ma et al, 2012). China's current steel--making capacity has exceeded 1 billion metric tons, with a utilization rate of 70% in 2013 (MIIT, 2013).…”

Section: Iron and Steel Sectormentioning

confidence: 99%

Capturing the Invisible Resource. Analysis of Waste Heat Potential in Chinese Industry and Policy Options for Waste Heat to Power Generation

2015

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“…These losses may be reduced by recovering the heat from flue gas [7]. Therefore, the waste heat recovery techniques [6] should be applied to the system so that the heat loss in flue gas is reduced and efficiency of furnace is improved [8]. Radiation losses through surface of furnace are only 3.48%.…”

Section: Heat Losses In Walking Beam Furnacementioning

confidence: 99%

Secondary steel mill furnace performance.

Gupta¹,

Bansal²,

N.Sriniwas³

2018

IJET

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Energy in a steel re-rolling mill is mainly consumed in furnaces. Therefore, furnace performance is very important and its contribution in the cost of product is very high. Data has been collected for two different furnaces in Stackle mill and analyzed for performance of furnace. In this paper, effect of furnace performance on secondary steel sector is analyzed. These data about performance is collected on Walking beam furnace in Stackle mill and Re-heating furnace,

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Analytical Research on Waste Heat Recovery and Utilization of China's Iron & Steel Industry

Cited by 53 publications

References 2 publications

Technical Aspects and Energy Effects of Waste Heat Recovery from District Heating Boiler Slag

Technical Aspects and Energy Effects of Waste Heat Recovery from District Heating Boiler Slag

Capturing the Invisible Resource. Analysis of Waste Heat Potential in Chinese Industry and Policy Options for Waste Heat to Power Generation

Secondary steel mill furnace performance.

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