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  • A Case Study on Accretion Formation in Rotary Kiln of DRI

    13/11/2020· In coal-based DRI process, accretion formation inside the rotary kiln is a genuine complex problem. Accretion formation in a rotary kiln of 100 tpd DRI plant has been investigated. The nature of accretion formation with respect to the charge burden and operational parameter have been discussed. High ash content in the coal and excess use of dolomite lead to accretion formation. Two

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  • [PDF] A study on the accretion formation in DRI kilns and

    However rotary kiln performance is adversely affected by the ring formation known as accretion. These accumulated sintered solid particles which gives formation of ring along the length of the kiln hinder material flow, lowers the life span of kiln and productivity. To improve the performance of rotary kiln and maintaining the quality of sponge iron, there is a need to reduce the accretion formation in the kiln. However it is difficult to control accretion formation

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  • A study on the accretion formation in DRI kilns and

    and pressures within a rotary kiln generates sponge iron as a product. However rotary kiln performance is adversely affected by the ring formation known as accretion. These accumulated sintered solid particles which gives formation of ring along the length of

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  • Accretion formation in rotary kiln Henan Mining

    Accretion formation in rotary kiln. Rotary kilns are used in several types of minerals processing operations, and in related industries such as cement manufacture Though the equipment is robust and the processes generally stable, issues such as ring accretion formation and minimization of energy consumption have often proven to be hard to tackle . Email: [email protected] Get a Quote Send

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  • Reduction In Accretion Formation Inside The Kiln

    Rotary kiln is a refractory lined horizontal steel cylinder (72 80 M long & 4.2m in diameter) which is slightly inclined (1.432o) towards out let side and the cylinder is rotated (0.35-0.7 RPM) by Motor Gear arrangement. The inner surface of kiln is made of a refractory castable material which primarily consists of 60-80% monolithic Alumina.

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  • Accretion Control in Sponge Iron Production Kiln using

    Accretion build up or ring formation in the kiln is normally caused by the deposition of low melting complex compounds on the refractory wall of the rotary kiln which gradually increases in thickness and takes shape of a circular ring. This narrows the kiln diameter which ends up hindering material

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  • [PDF] A study on the accretion formation in DRI kilns and

    However rotary kiln performance is adversely affected by the ring formation known as accretion. These accumulated sintered solid particles which gives formation of ring along the length of the kiln hinder material flow, lowers the life span of kiln and productivity. To improve the performance of rotary kiln and maintaining the quality of sponge iron, there is a need to reduce the accretion formation in the kiln.

    Details >
  • A study on the accretion formation in DRI kilns and

    and pressures within a rotary kiln generates sponge iron as a product. However rotary kiln performance is adversely affected by the ring formation known as accretion. These accumulated sintered solid particles which gives formation of ring along the length of the kiln hinder material flow, lowers the life

    Details >
  • Reduction In Accretion Formation Inside The Kiln

    Rotary kiln is a refractory lined horizontal steel cylinder (72 80 M long & 4.2m in diameter) which is slightly inclined (1.432o) towards out let side and the cylinder is rotated (0.35-0.7 RPM) by Motor Gear arrangement. The inner surface of kiln is made of a refractory castable material which primarily consists of 60-80% monolithic Alumina.

    Details >
  • Accretion Control in Sponge Iron Production Kiln using

    Accretion build up or ring formation in the kiln is normally caused by the deposition of low melting complex compounds on the refractory wall of the rotary kiln which gradually increases in thickness and takes shape of a circular ring. This narrows the kiln diameter which ends up hindering material

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  • How control accretion in rotary kiln during operation

    Accretion formation in rotary kiln Material inside the kiln tumbles and slides, and a thin layer of dust invariably forms on the surface of the refractory lining Some zones of the kiln may be specifically prone to particle accumulation and the bined effect of thermal and flow conditions results in the formation of cylindrical deposits, or rings due to its rotating motion

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  • “A study on the accretion formation in DRI kilns and

    Reasons for accretion/ring formation: The principle reason for build-up in rotary kilns is the formation of low melting complex compounds in the FeO-SiO2-Al2O3 system, such as wustite, fayalite, iron cordierite, hercynite, and in the CaO-MgO-FeO- SiO2-Al2O3 system, such as melilite or anorthite, akermanite, iron-magnesium cordierite, spinel, and iron- magnesium silicate.

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  • Utilization of Kiln Accretion as a Raw Material in Rural

    there is a tendency of accretion formation in the temperature range of 900oC to 1100oC inside the Rotary kiln refractory lining (Dash, et al.). Accretion is the catastrophic accumulation of sintered particles of solid bed which form rings at places along the length of the kilns.

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  • Coal based Direct Reduction Rotary Kiln Process IspatGuru

    The main raw materials for the production of DRI by the rotary kiln process are (i) sized graded iron ore or iron ore pellets, (ii) non-coking coal, and (iii) dolomite in small quantities to scavenge the sulphur. Iron ore of the right quality is the basic input for the coal based direct reduction process.

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  • SIPS2015 Formation of Accretions in Waelz Kilns as the

    Formation of accretions is one of the main disadvantages of the processes which are carried out in Waelz kilns (productivity falls, chemistry of the process is violated). Analysis of the accretions formation process reveals that the main causes of their growth are: Chemical composition of charge mixture (as it contains slag-forming compounds CaO, SiO2, FeO);<br />- The kiln rotation speed

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  • Counteracting ring formation in rotary kilns Journal of

    Avoiding the formation of rings in rotary kilns is an issue of primary concern to the cement production industry. We developed a numerical combustion model that revealed that in our case study rings are typically formed in zones of maximal radiative heat transfer. This local overheating causes an overproduction of the liquid phase of the granular material, which tends to stick to the oven’s

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