Method for producing a coking additive by delayed coking

Abstract

This invention relates to the field of oil refining and, in particular, to a delayed coking process that produces coke with a volatile substances content of 15-25% for use as a coking additive in a coal coking charge in the production of metallurgical coke. The invention is directed towards increasing the content of volatile substances in coke and increasing the efficiency of a plant. The method comprises preheating a primary raw material, mixing the latter with recycle in a tank in order to form a secondary raw material, heating the secondary raw material to 455-470° C. and supplying the latter to a coking chamber, and coking to form a coking additive. It is expedient to feed an antifoaming additive into the coking chamber 3-5 hours before coking is finished. It is preferable to feed in the antifoaming addition agent at two-four points around the perimeter of the coking chamber.

1 - 3 . (canceled) 
     
     
         4 . A method of producing a coking additive in delayed coking, comprising:
 heating a primary charge to 270-330° C.;   mixing the primary charge with a recirculate in a tank to form a secondary charge;   heating the secondary charge and introducing it into a coking chamber; and   coking to form a target product;   wherein the secondary charge is introduced into the coking chamber at 455-470° C.   
     
     
         5 . The method according to  claim 4 , further comprising introducing an anti-foaming dope into the coke chamber 3-5 hours before the end of coking. 
     
     
         6 . The method according to  claim 5 , wherein the anti-foaming dope is introduced into 2-4 areas around a perimeter of the coking chamber.