Romelt Process Production Indices with Partial Replacement of Coal by Natural Gas

Pokhvisnev, Yu. V.; Valavin, V. S.; Makeev, S. A.; Zaitsev, A. K.

doi:10.1007/s11015-019-00803-0

Cited by 2 publications

(1 citation statement)

References 1 publication

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“…In particular, there is still a certain dependence on coke in actual production and has high requirements for coal [10]. In order to completely get rid of the dependence on coke, based on the analysis of the existing ironmaking processes (COREX, Romelt [11], etc.) and combining the characteristics of China's energy and resources, the Central Iron and Steel Research Institute creatively put forward a novel ironmaking process of pre-reduction in rotary kiln and total oxygen melting pool (PROM) [12,13], as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Influence of Parameters on the Pre-Reduction Process of Vanadium-Titanium Magnetite Carbon-Containing Composite Pellets in Rotary Kiln

Wang

Ding

et al. 2020

Metals

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A novel smelting reduction process called pre-reduction in rotary kiln and total oxygen melting pool is a promising route to reduce environmental pollution from the ironmaking industry. In this paper, the process parameters and appropriate efficiency of reduction in the pre-reduction process of the rotary kiln were investigated via the detection of the metallization rate, phase composition, and internal morphology of the product combining with the analysis of the off-gas. The results indicated that the parameters of reduction temperature, reduction holding time, and coal ratio have a remarkable influence on the metallization rate. The reduction temperature has the most significant effect, followed by the reduction time and the coal ratio. Furthermore, under the condition of reduction temperature 1000 °C, holding time 30 min, coal ratio = 1, a product with a metallization rate of more than 70% can be obtained, which meets the requirements of the rotary kiln process, and its CO2/CO value of the pre-reduction endpoint is appropriate. Continue to increase the temperature, holding time, and coal ratio can raise the metallization rate of the pellets, but only a little improvement and may cause reoxidation of the product.

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Section: Introductionmentioning

confidence: 99%

Influence of Parameters on the Pre-Reduction Process of Vanadium-Titanium Magnetite Carbon-Containing Composite Pellets in Rotary Kiln

Wang

Ding

et al. 2020

Metals

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Thermal operation of superlayer space in Romelt furnace

Sborshchikov

Петелин

Terekhova

2022

Izv. vysš. učebn. zaved., Čern. metall.

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From the point of metallurgical heat engineering, the Romelt process is promising for processing industrial waste, poor ores and secondary metals without their preliminary preparation and the use of coke. But one of the main disadvantages of this process is high specific consumption of oxygen and fuel for the production of 1 ton of primary metal. The peculiarity of the Romelt process is that the main amount of heat required for implementation of the technological process is supplied to the bubbling layer from the superlayer space due to afterburning of the exhaust gases with technical oxygen. Heat transfer is carried out by a radiation-convective mechanism. Any changes in the afterburning process are possible, if they do not entail an unacceptable change in temperature in combustion zone. In the work, a study was conducted to reduce the specific oxygen consumption per 1 ton of primary metal, based on the data of melting a mixture of blast furnace and converter slurries for pig iron. The authors studied the possibility of reducing the specific oxygen consumption supplied to the superlayer space of the furnace for afterburning gases leaving the bubbling layer during the Romelt process. When using blast heating supplied to the lower tuyeres and oxygen heating supplied to the afterburning zone, it is possible to reduce the specific oxygen consumption per 1 ton of cast iron by 11 % without reducing the furnace performance. In the afterburning zone, it is recommended to use oxygen heated up to 400 °C in the recuperator with simultaneous supply of a blast heated up to 600 °C to the lower tuyeres.

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Romelt Process Production Indices with Partial Replacement of Coal by Natural Gas

Cited by 2 publications

References 1 publication

Influence of Parameters on the Pre-Reduction Process of Vanadium-Titanium Magnetite Carbon-Containing Composite Pellets in Rotary Kiln

Influence of Parameters on the Pre-Reduction Process of Vanadium-Titanium Magnetite Carbon-Containing Composite Pellets in Rotary Kiln

Thermal operation of superlayer space in Romelt furnace

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