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Recycling method for balling small oil shale granules in cold pressing manner

A technology of cold pressing into balls and oil shale, which is applied in the petroleum industry, special forms of carbonization, coking ovens, etc. It can solve the problems that small particle oil shale cannot be used and carbonization equipment refines oil, etc., and achieves significant social and economic benefits , avoid waste, improve the effect of utilization

Active Publication Date: 2014-12-10
郑州华宇高炉工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in view of the problem that the current small-grained oil shale cannot be refined by using the existing retort equipment, the present invention provides a recycling method of cold-pressing small-grained oil shale into balls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The recycling method of small grain oil shale cold-pressed ball of the present invention, the detailed steps of this recycling method are as follows:

[0028] A, the preparation of binding agent: represent with weight percentage, binding agent is made up of raw material clay 25%, 525 cement 25% and water glass 50%, at first take pottery clay, 525 cement and water glass according to the raw material composition ratio of binding agent, will The three raw materials weighed are placed in a mixing bucket for stirring, stirred for 2 hours, and the binder for oil shale is obtained after stirring evenly;

[0029] b. The small particle oil shale with a particle size of ≤8mm first enters the drum screen for classification, and the small particle oil shale with a particle size of ≤3mm is discharged through the outlet of the drum screen, and then enters the silo through the conveyor belt; 3mm< particle size≤8mm Small particles of oil shale are discharged through the discharge port ...

Embodiment 2

[0033] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0034] In step a: the binder is composed of 22% of raw clay, 26% of 525 cement and 52% of water glass, and stirred for 1.5h;

[0035] In step b: directly put the small-grained oil shale with a particle size of ≤8mm into a two-stage crusher for crushing, and crush it into oil shale with a particle size of ≤3mm and directly enter the silo;

[0036] In step c: the addition of the binder accounts for 10% of the total weight of the small particle oil shale to obtain an oil shale sphere (the oil shale sphere is elliptical, after testing: the strength is 172kg / cm 3 , with a porosity of 32%);

[0037] In step d: drying in a drying kiln, the drying temperature is 100° C., and the drying time is 14 hours.

Embodiment 3

[0038] Embodiment 3: basically the same as Embodiment 1, the difference is:

[0039] In step a: the binder is composed of 28% of raw clay, 27% of 525 cement and 45% of water glass, and stirred for 1.2h;

[0040] In step b: directly put the small-grained oil shale with a particle size of ≤8mm into a two-stage crusher for crushing, and crush it into oil shale with a particle size of ≤3mm and directly enter the silo;

[0041] In step c: the addition of the binder accounts for 5% of the total weight of the small particle oil shale to obtain oil shale spheres (the oil shale spheres are elliptical, after testing: the strength is 168kg / cm 3 , with a porosity of 33%);

[0042] In step d: use a drying kiln for drying, the drying temperature is 110° C., and the drying time is 13 hours.

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Abstract

The invention discloses a recycling method for balling small oil shale granules in a cold pressing manner. The method comprises the following steps: by taking water or a mixture of argil, cement and water glass as a bonding agent, grading the small oil shale granules with the granularity less than or equal to 8mm and feeding the small oil shale granules with the granularity less than or equal to 3mm into a stock bin; then feeding the small oil shale granules with the granularity less than or equal to 3mm in the stock bin into an agitator, adding the bonding agent, evenly stirring and feeding the mixture into a ball press machine to form oil shale balls; drying or airing the balls; finally, refining the dried or aired the oil shale balls by virtue of the existing dry distillation equipment so as to obtain shale oil. According to the method, the difficult problem that the resource is wasted because the existing small oil shale granules are abandoned is effectively solved. Thus, the abandoned small oil shale granules can be fully utilized. The method has significant economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of oil shale, and in particular relates to a recycling method for cold-pressing small grain oil shale into balls. Background technique [0002] Oil shale, also known as kerogen shale, is a sedimentary rock containing organic matter, generally belonging to high-mineral sapropel peat, a solid fossil fuel with low calorific value, and its color is light gray to dark brown. Oil shale contains two kinds of organic matter: one is soluble bitumen, which is soluble in organic solvents, and its relative content is very small, accounting for a few percent of the organic matter; the other is high-molecular polymers that are insoluble in organic solvents. called oil mother. Oil shale is an important raw material for "artificial petroleum" and "synthetic liquid fuel". After heating and dry distillation, oil parent decomposes to produce shale oil, dry distillation gas and shale semi-coke. ...

Claims

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Application Information

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IPC IPC(8): C10B57/06C10B53/06
Inventor 白继周胡军胜薛范真白勇
Owner 郑州华宇高炉工程技术有限公司
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