How To Achieve Control Of Rotary Kiln Feed Volume

Formulas kiln SlideShare

22/07/2010· Heat capacity of Rotary kiln 1 Q = x 10 ^ 6 x D ^3 Kcal / hr D = Mean inside Kiln Diameter on Bricks m 2 Kiln Thermal loading at cross section of burning zone = Qp = = Q / Fp Fp = x D^2 Inside cross section of the kiln burning zone m^2 where D is kiln shell diameter Q p = x 10 ^ 6 x D Kcal / m^ Qp should not exceed x

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Rotary kiln Wikipedia

A rotary kiln is a pyroprocessing device used to raise materials to a high temperature when the power is cut off will swing pendulum like many times before coming to rest The mass of a typical 6 x 60 m kiln including refractories and feed is around 1100 tonnes and would be carried on three tyres and sets of rollers spaced along the

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Dynamic Model for Simulation and Control

A dynamic mathematical model was developed for the simulation and control of cement rotary kilns The model consists of a set of nonlinear partial differential equations and represents the material and energy balances in the kiln Based on some logical assumptions the model does not only consider the reaction mechanisms but also reduces the complexity of computer simulation

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Rotary Kilns FEECO International Inc

Rotary kilns work by processing material in a rotating drum at high temperatures for a specified retention time to cause a physical change or chemical reaction in the material being processed The kiln is set at a slight slope to assist in moving material through the drum Direct fired kilns utilize direct contact between the material and

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An Expert System Application for Lime Kiln Automation

current kiln conditions Many of the problems facing kiln automation can be corrected by using present technology and by maintaining process sensors and equipment in good working order However there are certain kiln control loops such as the firing hood draft whose characteristics are beyond the capability of conventional process controllers

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Kiln Speed Page 1 of 3

Calciner kilns can accomodate shorter times Volume loading % loading = FR W t / L A Where FR=feed ratio kg of material entering the rotary kiln per kg clinker W= clinker production in ton/h A= effective kiln cross area m^2 Volume loading should be typically 7 8% for precalciner kilns and is higher for preheater kiln

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Accretion Control in Sponge Iron Production Kiln using

controlled temperatures and pressures within a rotary kiln However the performance of rotary kilns is usually adversely affected by the formation of accretion This accumulation of sintered solid particles which form rings along the length of the kiln hinders material flow lowers productivity and life span of the kiln To maintain the

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2 2 Lime Kiln Principles And Operations

ROTARY LIME KILNS Slides 1 and 2 are the title and outline for the presentation Slide 3 below shows a schematic of the exterior of a modern rotary lime reburning kiln Slide 4 shows a schematic of the interior features of a lime reburning kiln Rotary lime kilns are large steel tubes that are lined on the inside with refractory bricks

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PDF THE PROBLEMS OF ROTARY KILN OF

Reasons 1 Used tyre shoes increase the clearance leading to excessive ovality 2 Limit for Ω value maximum 1/10 of kiln diameter % for 5m diameter kiln c Symptoms Kiln shell ovality in tyre area squeeze and release during each rotation shear stressing the brick heads 5

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PDF THE PROBLEMS OF ROTARY KILN OF

Reasons 1 Used tyre shoes increase the clearance leading to excessive ovality 2 Limit for Ω value maximum 1/10 of kiln diameter % for 5m diameter kiln c Symptoms Kiln shell ovality in tyre area squeeze and release during each rotation shear stressing the brick heads 5

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Advanced Process Control of kilns in the

The control problem consists of maintaining a given temperature profile along the kiln plus obtaining good burning conditions Further the control strategy needs to achieve that at the lowest energy consumption possible which means riding along constraints such as amount of air in the exhaust gasses The problem exhibits relatively long time

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Accretion Control in Sponge Iron Production Kiln using

controlled temperatures and pressures within a rotary kiln However the performance of rotary kilns is usually adversely affected by the formation of accretion This accumulation of sintered solid particles which form rings along the length of the kiln hinders material flow lowers productivity and life span of the kiln To maintain the

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FAILURE ANALYSIS OF ROTARY KILN S TERTIARY AIR DUCTS

Rotary kilns are continuous process equipment used on calcining of nickel ore The chemical and physical reactions are created by means of heat up the material to predetermined temperatures Tertiary air fans are attached to the kiln shell to maintain oxidizing/reduction conditions Special ducts orientate the air flow inside the kiln In the

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OPERATIONS STRATEGIES FOR VERTICAL SHAFT LIME KILNS

the vertical shaft kiln This kiln can be described as an upright heavy steel cylinder lined with refractory material The limestone is charged at the top and is calcined as it descends slowly to discharge at the bottom of the kiln A primary advantage of vertical kilns over rotary kilns is the higher fuel efficiency The primary disadvantages of

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Formulas kiln SlideShare

22/07/2010· Heat capacity of Rotary kiln 1 Q = x 10 ^ 6 x D ^3 Kcal / hr D = Mean inside Kiln Diameter on Bricks m 2 Kiln Thermal loading at cross section of burning zone = Qp = = Q / Fp Fp = x D^2 Inside cross section of the kiln burning zone m^2 where D is kiln shell diameter Q p = x 10 ^ 6 x D Kcal / m^ Qp should not exceed x

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Coal based Direct Reduction Rotary Kiln

14/02/2017· Normally for rotary kiln process volatile matter is to be in the range of 25 % to 30 % Coals for direct reduction in the rotary kiln need to have low swelling index Normally swelling index is to be less than 1 The physical and chemical specifications of the non coking coal are as follows Size of lumps 5 mm to 20 mm

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Coal based Direct Reduction Rotary Kiln

14/02/2017· Normally for rotary kiln process volatile matter is to be in the range of 25 % to 30 % Coals for direct reduction in the rotary kiln need to have low swelling index Normally swelling index is to be less than 1 The physical and chemical specifications of the non coking coal are as follows Size of lumps 5 mm to 20 mm

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LUX SIGNIFER Types of Rotary Kilns

03/02/2017· Of the modern day rotary kilns the following can be distinguished wet kilns long dry kilns short dry kilns coolers and dryers and indirect fired kilns Some of these are discussed on the following lines 1 Wet Kilns Wet kilns are those that are usually fed with slurry materials Wet kilns are usually long with kiln lengths on the order

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IBU tec The Rotary Kiln Experts for Trials and

Rotary kilns sometimes called calciners or rotary furnaces are used for thermal treatment processes such as calcination sintering pyrolysis and firing as well as for oxidation and treatments can be applied to powders granulates suspensions and green rotary kiln consists of a cylindrical rotating body mounted between stationary material feed and outlet housings

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Model predictive control of a rotary kiln for

01/12/2019· Contour plot of rotation rate and stone feed rate impact on rotary kiln profit rate with a coal feed rate of kg/s and air flow rate of 120 m 3 / s The optimal conditions are shown by the white dot rotation rate = 1/min stone feed rate = kg/s and profit of $/s

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PDF THE PROBLEMS OF ROTARY KILN OF

Reasons 1 Used tyre shoes increase the clearance leading to excessive ovality 2 Limit for Ω value maximum 1/10 of kiln diameter % for 5m diameter kiln c Symptoms Kiln shell ovality in tyre area squeeze and release during each rotation shear stressing the brick heads 5

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How to deal with the leakage of the rotary

Rotary kiln in the production of active lime is one of the main equipment in the lime firing stage Leakage of kiln tail is a common cause affecting the normal production and operation of kiln Leakage at kiln tail causes air leakage at kiln tail and cold air is inhaled into kiln which increases heat loss

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Accretion Control in Sponge Iron Production Kiln using

controlled temperatures and pressures within a rotary kiln However the performance of rotary kilns is usually adversely affected by the formation of accretion This accumulation of sintered solid particles which form rings along the length of the kiln hinders material flow lowers productivity and life span of the kiln To maintain the

Get Price