accretion formation in rotary kiln

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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

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 combined effect of thermal and flow conditions results in the formation of cylindrical deposits or rings due to its rotating motion

Jan 11 2016 · 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

there is a tendency of accretion formation in the temperature range of 900 oC to 1100 oC 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 This is a regular phenomenon in the DRI rotary kiln It narrows

Optimization problem discussed here for a coalbased rotary kiln to find the optimal operating conditions keeping desired targets like quality and accretion formation temperatures of kiln within

The temperature profiles of the gas and charge in a coalfired rotary sponge iron kiln affect both the iron ore reduction process and accretion formation The temperature profile of charge is estimated from the eleven thermocouples TC1TC11 placed along the 80 m length of the kiln The quality prediction models are heavily dependent upon the accuracy of the measurement of TC10

Although no accretion formed in the rotary kiln the results were unsatisfactory The recoveries of nickel and iron were 526 and 376 respectively The produced ferronickel concentrate with the respective average nickel and iron grades of 26 and 256 was not a good raw material for steelmaking Table 3

Optimization problem discussed here for a coalbased rotary kiln to find the optimal operating conditions keeping desired targets like quality and accretion formation temperatures of kiln within

ED SIMA requested the participants to volunteer to spare their rotary kiln for carrying out the RD for exploring the use of Syn Gas in the rotary kiln Mr T Srinivasa Rao MD • Auto control of SAB blowers to restrict accretion formation • Integration of dynamic model with multi gas analyzer to improve the quality of SI