Download - Lime Briquetting

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PRESENTATIONS ON

REVAMP, TECHNOLOGY UPGRADATION & CAPITAL REPAIR OF

BRIQUETTING PLANT ON CONVERSION CHARGE BASIS.

CAPITAL REPAIR AND MODIFICATION OF BAG HOUSE AT LIME DISCHARGING BUILDING FOR 50 Mg/Nm3 STACK EMMISSION.

MECHANISED HOUSE KEEPING WITH VACUUM CLEANINGSYSTEM ON BOOT BASIS.

TECHNO ENVIRO SERVICES PVT LTD

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Bokaro Steel Plant

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The process of transforming

finely divided particles

into particles of a larger size

by the introduction of outside forces.


*BRIQUETTING*

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Lime Briquetting Useful IndustrialMaterial Recycling Process Successfully Implemented

ATVISAKHAPATNAM STEEL PLANT

Production Started in 1996By our Associates

AVANI LIME TECH PVT LTD

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VISAKHAPATNAM STEEL PLANT

The Briquetting rolls are 18" (457.2mm) in diameter and 6" (152.4 mm) wide, with half-briquette cavities machined into their circumference faces.

Calcium Stearate is added as a Binder & Lubricant

Briquettes Shape: Almond shapeSize along major axis: 50mmSize along minor axis: 25mm

Thickness: 20mm

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Preserves our Natural Resources by Decreasing the demand for Virgin Materials

Conserves Energy and Reduces Greenhouse Gas Emissions by Decreasing the demand for Products made from Energy Intensive Manufacturing Processes

Save Money by Decreasing Disposal Costs for the Generator and Decreasing Materials Costs for End Users

Minimize or Eliminate Dust

Improve House Keeping

Specifically at BSL, Stop (-) 10 mm Lime going in the Converter

Reasons Industrial Materials Recycling

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When limestone is calcined in kilns for quicklime10 to 20 per cent of the stone abrade & emerge as

finesHandling and shipping the fines is difficultThere are various industrial processes to use finesMore practical alternative

IS

#Quicklime fines into Briquettes#

PROBLEM & SOLUTION

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Lime briquetting is a process ofcompaction of lime fines intobriquettes of a size similar to thepremium product in almond shapes.

In this form, the full volume of finescan be reclaimed and used alongwith the top-quality lime.

This can significantly improve plantproductivity and cut unit costs bymaking use of raw material.

PROCESS

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Binders & Lubricants

•Binders or Lubricants are additives that increase the strength of the briquette by helping to hold the particles together.

•Lubricants are mixed into the feed material before briquetting and provide a denser briquette by reducing friction between particles during compaction.

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The basic components of a roll-type briquetting Machines are two rotating rolls , with half-briquette cavities cut into the circumference of each. The cavities on opposing rolls match up as the rolls turn, momentarily forming whole cavities as both halvessimultaneously pass through the roll centre-line.

The Briquetting Machines

Loose material is fed between the rolls at their nip region (where the rolls come together), filling the cavities just prior to closure. Pressure applied to the material by the closing of the cavities compresses the materials into a solid mass. As each cavity passes beyond roll center-line, its two halves naturally move apart, allowing the formed briquette to slide out and discharge from the machine.

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TYPICAL FLOW DIAGRAM

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TYPICAL FLOW DIAGRAM

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At Bokaro Steel Plantin the RMP

area one Quick Lime Fines Briquetting Plant was commissioned in the year 1990

and due to change in the product mix it is lying inoperative for more than 20 years

Lime Fines Briquetting System was Designed, Manufactured & Commissioned by Macmet

BOKARO STEEL PLANTBriquetting Plant

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PROBLEM

Briquetted lime produced had the crush strengthless

than that of natural pebble lime As a result, briquettes would suffer

breakage and disintegration during material handling breaking into powder

half way to the user departments , SMS I & II.

This exactly what CAUSED the RMP

SYSTEM TO FAILURE


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Material Flow Diagram

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Briquetting Flow Diagram

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Condition of 1st Machine

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Condition of 2nd Machine

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PRESENT STATUS OF LIME FINES BSL

At present the entire (-) 10 mm quick lime not separated at any stage, thus being fed in the Converters.

The fines are generating pollution problem at all the area involved i.e. Lime Receiving Building, Junction Houses, and SMS I & II.

There are approximately 100 tons per day (-) 10 mm lime is generated. The Guaranteed generation has been advised of 50 tons

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APPROX TOTAL COST OF WORK INCLUDING SUPPLIESRs16 80, 00,000/-

PROCESSING COST PER TONNE (based on 50 tons/day)Rs 5,000/Ton

COST of Production of Lime for BSL Rs 10,500/Ton

Cash Accruals per AnnumRs 18 crores

Material Recovery per Annum37,000 Tons

CLEAN ENVIRONMENTNO FINES ADDED TO CONVERTORSOLD PLANT VALUE REALISATION

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LIME DISCHARGING BUILDIND

System is not working at all

No Proper Skirting

All Dampers failed

Purging System failed

Bags are removed or choked

Air Compressor not working

Suction also seems to be less

STATUS

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We will do total System

Up gradationCapital RepairReplacing the type of Bags and sizeNew latest Air Purging SystemNew Air Compressor with DrierWill do O & M with spares

AND

Guarantee less then 50 mg/Nm3 Stack emission

For a lumsum per month charges including cost of finance and O&M

SULUTION

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We will

INSTAL INDUSTRIAL VACUUM CLEANING & RECOVERY SYSTEM

ON

BUILT OPERATE & TRASFER BASIS

INDUSTRIAL VACUUM CLEANING SYSTEM

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INDUSTRIAL VACUUM CLEANING SYSTEM

P & I DIAGRAM

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Bokaro Steel Plant