PROCESS OF RECOVERING OIL FROM OIL-CONTAINING MINERALS

摘要

A process of recovering oil from an oil-contain-ing mineral by retorting the oil containing material and separating of oil in a separating stage from the retort gases obtained therefrom which contain the retorting products. The solid carbon contained in the retorted material after the retorting is burnt by a supply of oxygen-contain-ing gases, part of the resultant burnt hot mineral in admixture with the oil-containing mineral is charged into a retorting shaft reactor whereby the oil-containing mineral is heated and retorted. At least a portion of the retorting is effected in a retorting shaft reactor, the mineral from the retorting reactor is charged onto a traveling grate, a subsequent retorting is effected in an afterretorting zone, in which inert or reducing gases are passed through the material. The gases from the retorting reactor and from the after-retorting zone are supplied to the said separating stage and oil is removed from the gases in the separating stage. The retorted bed of material is moved on the traveling grate to a combustion zone. The solid carbon contained in said mineral in the surface of said bed is ignited at the beginning of the combustion zone. Oxygencontaining gases are then sucked through the bed to cause the burning zone to move through the bed, and the resultant burnt mineral is discharged from the traveling grate and part of the fired mineral is recycled to the retorting reactor.