Training

A Seminar On

Practical Training Taken At Binani Cement Ltd.

Binanigram, Sirohi (Raj.)

Presented By:- KULDEEP SINGH

RAO B-Tech,IV

year, E.I.&CE

Content CEMENT MANUFACTURING PROCESS INSTRUMENTATION IN CEMENT PLANT VIBRATION METAL DETECTOR WEIGH FEEDER/ BELTWEIGHER PROXIMITY SWITCH CONTROL VALVE POLLUTION CONTROL DCS (Distributed control system) SAFETY CONCLUSION

About Binani cement Ltd.

NAME OF COMPANY : BINANI CEMENT LTD.

CONCERNED GROUP : BRAJ GROUP

TURN OVER : Rs 500 MILLION.

POWER CONSUMPTION:- : 76 UNITS PER TON OF CEMENT : 678 K Cal /Kg of clinker PRODUCT : 43 GRADE CEMENT : 53 GRADE CEMENT : POZZOLAND PORTLAND CEMENT

PROCESS OF CEMENT MANUFACTURING The plant is divided into various sections

according to the process. Mines Crusher Stacker Raclaimer Row mill Per-heater Kiln Coal mill Cooler Cement mill Packing plant & dispatch

What is cement Cement can be defined as any substance

can join or unite two or more pieces of same other substance together to form a unit mass.

Cement as used in construction, is a fine powder which when mixed with water and allowed to set and harden can join different component to give mechanically strong structures.

Cement clinker are two products, when clinker grinned with gypsum gives (O.P.C) ordinary Portland cement

Raw material of cement

Lime stone High grade lime stone Bauxite Blue dust Silica Iron ore

Mines

There are two mines. The mines area spreadat 9km^2. Which is rectangle of 1 km wide & 9 km length.Detail about mines:-

Mineral dressing & size reduction :- Removing unnecessary material like mud, soil, &

low grade lime stone.

Mining :- Before it lots of work done, Removing overburden

in open cast mining.

Over burden Removal

Bench marking

Drilling

Blasting &

Transportation of lime stone to crusher.

Crusher Crusher is size reduction unit. Single rotor, impact type in which lime

stone is crushed about 6cm to 8cm. Dc power transmission is given through

v type belts. It has 6 blow bar . Each weight is 504 kg. There are sieve (vibrating screen), which

reject the lime muddy & heavy in weight .

Crusher Type : Single rotor impactor Capacity :550 TPH RPM :1000

Now the material from the crusher transferred through belt conveyor to stacker & reclaimer unit .

The reclaimer futher reduced it size (90mm)and stacker makes it pile and futher transferred through belt conveyor to Hoppers

Row mill It is mixing the raw material using

conveyor belt & weigh feeder.

It is vertical roller mill equipped with magnetic separator & metal detector just before it.

Water spray inside it to avoid much friction and abrasion.

Row Millhave following part

Roller & table. Air hydraulic unit (Nitrogen). Lubricant unit . Gas chamber. Magnetic separator Metal detector Blending silo Bag house

Kiln Mill It has two part ,Pre-heater & Rotary kiln.

PRE-HEATER:-

Per-calcinations(67%) :- It also called per-heater. The Per-calcinations

technology is introduced in 1978 for reduced the length of kiln &to large energy was also save, in considerable amount.

KILN: kiln is heart of cement industry

convert The per-calcinations raw mix into the clinker.

Kiln derived into three zone: Calcinations zone Burning zone + coal entering Cooling

Cement Mill Clinker from silo is comes into hopper from

where it goes to weigh feeder .simultaneously gypsum is also added though another weigh feeder. Both material is proportionally mixed and fed into cement mill.

The cement mill is a horizontal mill and another names is ball mill consist as grinding in the mill are ball. It consist of tow parts, initially the grinding is done by big ball and second section grinding is done by small ball which result in fine to be checked by .for this tons per hour of martial passed to the cement mill .

Packing Plant Cement from the cement silo comes into

automatic rotary packer. There are four packer, three are 12 spouts & one 16 spouts.

worker put empty bags to the hook of packers 50 kg cement is automatically filled in this packs as the packer pack .The weight of cement is continuously displayed and a weigh becomes 50kg.the pack get sealed & transferred to conveyor belt. These packs are loaded automatically in trucks & in wagon (PLC programming over there )

Why we use 4-20mA current loop

With 0-20 or 0-10 mA you can’t distinguish between min field value and connection break .Witth 4-20 mA ,internal circuit can distinguish between connection break of min value. Normally when the value is min the transmitter will give you 4 mA while in case of connection breakage it will give you 0 mA.

Instrumentation in cement plant

Bnani cement Ltd. is an automated plant. In any automated plant, instrumentation plays a very important role. All the parameters are to be measured at the site and have to be measured transmitted to control room where their values are checked and controlled (CCR).

Measured- Parameters

Temperature:-RTD, Thermocouple, thermometer, pyrometer etc.

Level:-Ultrasonic level sensor, phola-phone, RADAR etc.

Proximity switches Limit switch ZSS (Zero speed switch) Pull cord switch

Separator Metal detector Magnetic separator

Control valve: Solenoid valve water spray valve.

Weigh feeder WEIGHING SYSTEMS ARE ESSENTIAL

NEED OF ANY PROCESS INDYSTRY WHERE ROW/ FINE MATERIAL HANDLING REQUIRED WITH AQURACY.

MOST COMMON WEIGHING SYSTEMS THAT ARE USED IN PROCESS PLANTS ARE-

1. WEIGH FEEDER2. BELT WEIGHER3. SOLID FLOW FEEDER/ METER ETC.

BLOCK DIAGRAM: W/F

PRINCIPLE OF OPERATION

LOAD (Q) PER UNIT LENGTH MULTIPLIED BY

THE SPEED (I) OF THE BELT / APPRON GIVES THE

RATE OF TRANSFER IN UNIT TIME. THIS RATE (I)

IS INTEGRATED W.R.T. TIME GIVES THE

QUANTITY CONVEYED .

I= Q . V . 3600

WHERE I in Kg/hr

Q in Kg/m

V in m/s

COMPONENTS OF WEIGH SYSTEM

WEIGH FEEDER SYSTEM CONSIST OF :

1. LOAD CELL

2. TACHO LOAD CELL

STRAIN GAUGE BASED LOAD CELL IS EMPLOYED TO SENSE LOAD ACTING ON

IT.

LOAD SENSING PRIMARY COLUMN IS MADE OF CORROSION RESISTANT SUPER

TOUGH STEEL ALLOY OF HIGH TENSILE STRENGTH AND THE STRESS

DEVELOPED DUE TO THE LOAD IS MEASURED WITH FOUR PRECISION FOIL

TYPE STRAIN GAUGES BONDED TO THE SENSING ELEMENT. THE STRAIN GAUGE RESISTORS ARE CONNECTED TO FORM A BALANCED

WHEATSTONE BRIDGE NETWORK

TACHOGENERATOR THE SPEED OF WEIGH FEEDER IS SENSED BY

A TACHOGENERATOR, COUPLED TO THE SHAFT OF THE DRIVEN PULLY OF THE BELT WHICH ELEMINATES THE SMALL ERRORS CAUSED DUE TO BELT SLIP.

DIGITAL TACHOMETER GIVES PULSES PROPORTIONAL TO ITS SPEED OF ROTATION IS COUPLED TO DRIVEN PULLY.

Pollution control

BAG HOUSE JPF ESP

DCS Distributed control system (DCS) is widely used for

automation in modern industry since a process industry is usually installed in wide area and has a large number of machine and process sections, hence to operate and control all the machinery suitable from one place i.e CCR ,one may install DCS. It has the capability to interface with external party software .

The DCS system used in industry .I took my training has a supplied by the company ABB, hence the system is also know as ABB master.

Thank You