MEROS<sup>®</sup>: an improved dry-type gas-cleaning process for the treatment of sinter offgas

Fleischanderl, Alexander

doi:10.1051/metal:2006126

Cited by 11 publications

(5 citation statements)

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“…), and semidry FGD (circulating fluidized beds process, MEROS process, etc.). [11][12][13][14][15] However, many issues still exist as current desulfurization technologies are characterized by giant investment for equipments, heavy operating cost and low desulfurization efficiency because of low SO2 concentration in the conventional sintering process.…”

Section: Introductionmentioning

confidence: 99%

Behavior of SO2 in the Process of Flue Gas Circulation Sintering (FGCS) for Iron Ores

Liu

Rao

et al. 2014

ISIJ Int.

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In order to reduce SO2 emission in the iron sintering process, the flue gas circulation sintering (FGCS) process has been recommended and put into practice. In this process, flue gas containing low SO2 concentration is recirculated to the sintering process, achieving the concentration of SO2 content in the off-gas, which is favorable for current flue gas desulphurization processes. In this study, SO2 behavior in different sintering zones was investigated under the simulated experimental conditions. In the moisture condensation zone and sinter mixture zone, SO2 of recirculated flue gas is absorbed by the moisture and slaked lime of sinter mixture; in the drying and preheating zone, part of SO2 in circulating flue gas is absorbed by dry slaked lime in sinter mixture under low temperature conditions, and SO2 is generated by oxidization of sulfides and re-released by decomposition of sulphurous acid; in the hot zone, SO2 in circulated gas is partially absorbed by the molten phases, newly crystallized minerals such as calcium ferrite and dissociative CaO; in sinter zone, part of SO2 is absorbed by residual CaO in sinter under the condition of humid circulated flue gas, which results in unfavorable increase of residual S in the up layer sinter.

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Section: Introductionmentioning

confidence: 99%

Behavior of SO2 in the Process of Flue Gas Circulation Sintering (FGCS) for Iron Ores

Liu

Rao

et al. 2014

ISIJ Int.

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“…The main combustion produce gas in sintering is CO 2 . Typical Flue Gas Recirculation (FGR, Figure 2) sintering [23] includes the waste gas regional recirculation process developed by Nippon Steel [24], and similar technologies have been developed now, such as the Exhaust Gas Recirculation (EGR) sintering technology developed by Hata [25], the Emission Optimized Sintering (EOS) process developed by Corus Ijmuiden in Netherlands [26], the LEEP (low emission and energy optimized sintering process) developed by HKM [24] and the EPOSINT (environmental process optimized sintering) process developed by Siemens VAI [27][28][29].…”

Section: Flue Gas Recirculation (Fgr) Sinteringmentioning

confidence: 99%

CO2 Utilization in the Ironmaking and Steelmaking Process

Dong

Wang

2019

Metals

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Study on the resource utilization of CO2 is important for the reduction of CO2 emissions to cope with global warming and bring a beneficial metallurgical effect. In this paper, research on CO2 utilization in the sintering, blast furnace, converter, secondary refining, continuous casting, and smelting processes of stainless steel in recent years in China is carried out. Based on the foreign and domestic research and application status, the feasibility and metallurgical effects of CO2 utilization in the ferrous metallurgy process are analyzed. New techniques are shown, such as (1) flue gas circulating sintering, (2) blowing CO2 through a blast furnace tuyere and using CO2 as a pulverized coal carrier gas, (3) top and bottom blowing of CO2 in the converter, (4) ladle furnace and electric arc furnace bottom blowing of CO2, (5) CO2 as a continuous casting shielding gas, (6) CO2 for stainless steel smelting, and (7) CO2 circulation combustion. The prospects of CO2 application in the ferrous metallurgy process are widespread, and the quantity of CO2 utilization is expected to be more than 100 kg per ton of steel, although the large-scale industrial utilization of CO2 emissions is just beginning. It will facilitate the progress of metallurgical technology effectively and promote the energy conservation of the metallurgical industry strongly.

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“…In the MEROS process (maximized emission reduction of sintering), developed by Siemens-VAI [8], dust, acid gases, hazardous metals and organic compounds are eliminated with high efficiency rates, and this treatment fulfills current environmental regulations. There are two options of desulfurization agents: option A uses hydrated lime and option B uses sodium bicarbonate.…”

Section: Introductionmentioning

confidence: 99%

MEROS Dust Quality of Different Plants and Its Potential Further Uses

Hledik

Goetz

Ottner

et al. 2021

Metals

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Sintering is a process of agglomeration of fine particles into porous sinters for blast furnaces. During the sintering process, high volumes of sinter plant gas containing high loads of dust, SO2 and NOX and toxic pollutants, such as heavy metals (e.g., Hg, Pb, Cr and Cd) and PCDD/F, are emitted. The objective of this study was to characterize dusts of different plants as the basis for suggestions of reutilization and treatment options. Dusts, eluates and residues were produced and DOC, T-N, ions and heavy metals were analyzed. The results show that dusts from different plants are very similar in terms of DOC, T-N, Mg, Ca and many heavy metals and only differ in criteria such as suspended solids and ions such as K, Na, Cl and SO4. Based on the high levels of alkalis and low levels of iron, direct recycling into the sinter or furnace process is not recommended. The dissolution of the soluble substances in water reduces the MEROS dust by 90% of the weight and extracts the alkalis. The remaining wastewater needs to be treated to reduce DOC, T-N and some heavy metals. The solid residues can be recycled into the sinter to reduce potential PCDD/F, which are attached to the activated carbon.

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MEROS^®: an improved dry-type gas-cleaning process for the treatment of sinter offgas

Cited by 11 publications

References 0 publications

Behavior of SO2 in the Process of Flue Gas Circulation Sintering (FGCS) for Iron Ores

Behavior of SO2 in the Process of Flue Gas Circulation Sintering (FGCS) for Iron Ores

CO2 Utilization in the Ironmaking and Steelmaking Process

MEROS Dust Quality of Different Plants and Its Potential Further Uses

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MEROS®: an improved dry-type gas-cleaning process for the treatment of sinter offgas

Cited by 11 publications

References 0 publications

Behavior of SO2 in the Process of Flue Gas Circulation Sintering (FGCS) for Iron Ores

Behavior of SO2 in the Process of Flue Gas Circulation Sintering (FGCS) for Iron Ores

CO2 Utilization in the Ironmaking and Steelmaking Process

MEROS Dust Quality of Different Plants and Its Potential Further Uses

Contact Info

Product

Resources

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MEROS^®: an improved dry-type gas-cleaning process for the treatment of sinter offgas