Engineering Transportation

Coke. Quality and Production by Roger Loison

By Roger Loison

This publication makes an attempt to supply the clinical and technical foundation of coke manufacture. It offers an in depth account of the actual and chemical mechanisms taking place in coke oven chambers and the research of the features of the goods. The creation of coke has constantly been a posh job. This research goals to supply a close account of the actual and chemical mechanisms happening in coke oven chambers and the methods for making a choice on the features of the product. there's specific emphasis at the effect of coal caliber and creation parameters at the ensuing coke. The experimental paintings is drawn from effects bought at CERCHAR however the details is designed to be acceptable in a wide selection of events

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The most commonly used dilatometer is that advocated by Audibert and Arnu, which has been standardized at international level. The first three instruments mentioned below permit a study of only the first phenomenon. The last two also permit a study of the second. The Audibert-Arnu dilatometer [37] indicates the dimensional variations of a Characterization and classification of coals for cokemaking 41 cylindrical pencil of compacted coal as a function of temperature. 16) is obtained which is essentially characterized by contraction followed by dilatation.

The weight loss is reported on the basis either of the air-dried coal, of coal dried at 105°C or of dry, ash-free coal. The terms used are then volatile matter (dry basis) or volatile matter (dry ash-free basis). Note: An interesting attempt at automation of ash and volatile matter determinations has recently been made by the American firm of LECO. The apparatus (MAC-400) allows 19 simultaneous determinations. 14). During the entire heating cycle this turntable has two movements: one is of discontinuous rotation (by ^ revolution) and the other is an up and down movement so that each crucible is successively placed on the pan of an electronic balance.

4 Agglutination indices The object of agglutination tests is to determine to what degree the particles of coal are capable during fusion of adhering to one another and to an inert substance mixed with them, to give a solid coherent coke. There are two types of test: 1. With a constant proportion of inerts, in which the mechanical strength of the coked residue is measured. 2. With a variable proportion of inerts, where the quantity of added inerts is determined which imparts a given strength to the button or a given degree of swelling.

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