Process for producing caking additive for coke production and process for producing coke

Abstract

A process for producing a caking additive for coke production, the process including a step of extracting a solvent deasphalted pitch that can be used as a caking additive for coke production from a residue containing at least one of an atmospheric residue obtained by atmospheric distillation of a crude oil and a vacuum residue obtained by atmospheric distillation and vacuum distillation of a crude oil, wherein the extraction is performed using, as a solvent, a light reformate obtained by catalytic reforming a naphtha fraction that is fractionated from a crude oil by atmospheric distillation of the crude oil.

Description

TECHNICAL FIELD[0001]The present invention relates to a process for producing a caking additive for coke production and a process for producing coke, and relates particularly to a process for producing a caking additive for coke production that is obtained using crude oil as a raw material and a process for producing coke.[0002]Priority is claimed on Japanese Patent Application No. 2009-23053, filed Feb. 3, 2009, the content of which is incorporated herein by reference.BACKGROUND ART[0003]Blast furnace coke is essential in blast furnace operations, as a heat source for melting mineral ores, as a reducing agent for reducing iron ore to obtain iron, and as a high temperature resistant support material for maintaining gas permeability and melt permeability within the blast furnace. Accordingly, the coke requires sufficiently high strength to withstand the pressure of the packed bed inside the blast furnace while achieving a high degree of porosity, and must have a high level of abrasio...

AI Technical Summary

Benefits of technology

The present invention provides a process for producing a superior coking additive for coke production without causing damage to the asphaltenes due to thermal decomposition reactions. Compared to existing methods, this process allows for higher coke strength and can produce a more effective coking additive with a higher yield. The process also enables the use of a larger amount of non-coking or slightly coking coal, while still obtaining a high-strength coke. Additionally, the use of a light reformate solvent in the process results in a more favorable coking additive.

Problems solved by technology

However, there are limitations on the production of such strongly caking coal in terms of the production locality, quantity and cost, and it is anticipated that resource depletion may also become problematic in the near future.

Images