Device and method for concentrating kerogen from easily-slimed oil shale

Abstract

The invention discloses a device and method for concentrating kerogen from easily-slimed oil shale. The device comprises a crusher, a sliming device, a vibrating screen, a mixing barrel, a feeding pump, a heavy medium separating device, a light product medium removing and dewatering screen, a heavy product medium removing and dewatering screen, a magnetic separator, a qualified medium barrel, a medium supplementing barrel, a centrifugal machine and a thickener. Oil shale is crushed through the crusher and then enters the sliming device; the slimed oil shale enters the vibrating screen to be classified; materials on the screen enter the heavy medium separating device; obtained products are subjected to medium removing and dewatering, and large blocks of kerogen-rich products and large blocks of kerogen-poor products are obtained; heavy media are recycled and reused through the magnetic separator; materials under the screen and tailings of the magnetic separator are subjected to dewatering of the centrifugal machine and the thickener, and high-slime-content fine-grain kerogen tailings are obtained; and overflow of the thickener becomes circulating water, and the circulating water returns to the heavy media to be separated. The device and method are suitable for separating of easily-slimed oil shale, the washing precision and a kerogen concentration effect can be improved, the tailing water treatment link is simple, and the device and the method are easy to achieve and have high practicability.

Description

technical field [0001] The invention belongs to the field of oil shale industry, in particular to a method suitable for sorting and enriching kerogen in oil shale that is easy to muddy, and is used to remove some minerals in oil shale and improve oil shale full-grain grade medium oil. parent material content. Background technique [0002] The kerogen of oil shale can be obtained by low-temperature dry distillation at about 500°C to obtain shale oil, which can be further processed into gasoline, diesel oil or used as fuel oil. The density of kerogen is generally 1.0~1.8g / cm 3 , the density of the mineral is about 2.2g / cm 3 , The density of oil shale mainly depends on the content and density of inorganic minerals. Generally speaking, the higher the density of oil shale, the lower the oil content. In addition, the minerals in oil shale are mainly clay minerals such as kaolinite, montmorillonite, illite, hydromica, etc. These minerals are easily muddied when exposed to water....

AI Technical Summary

Problems solved by technology

However, inorganic minerals play a harmful role in the utilization process of dry distillation or combustion, which greatly reduces the purity and conversion utilization rate of oil shale reaction products, and affects the economic and social benefits of oil shale processing.

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