FIELD: oil and gas production.
SUBSTANCE: invention relates to oil processing and can be sued at delayed coking of unstable black oils. Method includes heating of oil stock and its feeding into coking rector by two flows, with following feeding of steam and gas coking products into rectification tower for separation. In the capacity of the first flow fed into reactor, there are taken tar or mixture of tar with recirculator - heavy gas oil for coking, heated up to temperature of coking 495 -505°C. In the capacity of the second flow it is taken asphalt, heated up to temperature 430 - 460°C.
EFFECT: method provides increasing of period of service of coiled pipes of kiln up to its carburising.
2 cl, 1 tbl
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