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Chenkumbi Lime

By John Spiropoulos
ISBN: 9781853391446
The experience at Chenkumbi in central Malawi has demonstrated that vertical shaft kiln technology (VSK) can be adapted to small-scale production and produce high grade chemical lime economically.

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  • Synopsis
    Lime is not only an important building material but an essential ingredient in many industrial processes, such as agriculture and sugar manufacture. As a binder in the construction industry, it is simpler and cheaper to produce than Portland cement and yet just as effective for most building requirements in the Third World. As such, lime has a valuable role to play in the development process. The experience at Chenkumbi in central Malawi has demonstrated that vertical shaft kiln technology (VSK) can be adapted to small-scale production and produce high grade chemical lime economically. Another benefit of this technology over traditional methods is that coal or plantation-grown softwoods can be burnt in preference to native hardwoods — a process that has been leading to severe deforestation in the region.
  • Table of Contents
    INTRODUCTION 1
    The case for lime
    1. Raw Materials, applications and production 4
    Raw materials; Applications; Theory of calcination and factors
    affecting kiln design and operation; Kiln technology and choice
    2. Background 10
    Project location and environment; Social and economic survey;
    Mineral resources; Fuel resources; Market for lime;
    Preliminary investigations
    3. Traditional production 13
    Production cycle and technology; Input/output; Quality; Fuel
    consumption and efficiency; Project implementation strategy
    4. Natural draught vertical shaft kiln 17
    Quarrying; Kiln firing; Slaking; Screening, milling and
    bagging; Input/output; Quality; Fuel consumption and
    thermal efficiency
    5. Experimental forced-air kiln—Chenkumbi 20
    Forced air technology; Chenkumbi Hills—experimental forced
    air system; Kiln operation; Results; Input/output; Product
    quality; Fuel consumption and thermal efficiency
    6. Balaka forced-air system 25
    Quarrying; Kiln design: operation and performance, Kiln
    charging; Kiln operation; Forced air unit; Kiln discharge;
    Input/output; Quality; Fuel consumption and thermal
    efficiency; Experimental hydrator, milling and classification
    plant
    APPENDIX 1 32
    Uses of lime and lime hydrate
    APPENDIX 2: 33
    Experimental forced-draught kiln trials
    TABLES 34
    1. Forced draught experimentation results;
    2. Fuel consumption and efficiency;
    3. Comparative capital costs;
    4. Comparative incomes statement;
    5. Comparative economic analysis
    References 39
  • Details
    Sub Title N/A
    Author John Spiropoulos
    Editor No
    Number of Pages 44
    Format Paperback / softback
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