CN104984819A

CN104984819A - Oil shale tailings beneficiation process

Info

Publication number: CN104984819A
Application number: CN201510465338.9A
Authority: CN
Inventors: 常建勇; 石增鑫
Original assignee: JINYITONG TECHNOLOGY (BEIJING) CO LTD
Current assignee: JINYITONG TECHNOLOGY (BEIJING) CO LTD
Priority date: 2015-07-31
Filing date: 2015-07-31
Publication date: 2015-10-21
Anticipated expiration: 2035-07-31
Also published as: CN104984819B

Abstract

The invention relates to an oil shale tailings beneficiation process and belongs to the oil shale industrial field. The oil shale tailings beneficiation process is especially suitable for the oil shale tailings processing utilization industry. The process includes the following steps that: water is added in oil shale raw ores, and the oil shale raw ores are subjected to 10-to-13mm screening, and plus-sieve products which are larger than 10 to 13 mm are crushed and are mixed with minus-sieve products which are smaller than 10 to 13 mm, the crushed plus-sieve products and the minus-sieve product are subjected to separation through adopting a hydrocyclone, underflow products are dehydrated through a high-frequency screen, so that gangue products can be obtained, and overflow products are dehydrated through the high-frequency screen and granulated so as to form nubbly concentrate products, all slime water generated by all the products that pass through the high-frequency screen is thickened and clarified, and precipitates are subjected to filter pressing, so that tailings products can be obtained; and clarified water and filtered liquid can be adopted as circulating water. According to the oil shale tailings beneficiation process, after being crushed, the oil shale tailings are subjected to separation through adopting the hydrocyclone, and therefore, the oil shale tailings beneficiation process is simple, efficient and economical, and has a higher economic value. With the oil shale tailings beneficiation process adopted, problems of complex production process, high production investment and low separation efficiency can be solved, and the concentrate yield of oil shale can be effectively improved.

Description

Ore deposit, a kind of oil shale end ore-dressing technique

Technical field

The invention belongs to oil shale industry field, be particularly useful for ore deposit, oil shale end processing and utilization industry, be used for removing the inorganic mineral in ore deposit, oil shale end, obtain higher concentrate yield, produce larger economic benefit.

Background technology

Oil shale belongs to unconventional petroleum resources, is listed in the 21 century very important energy of taking over the feasibility of aboundresources and exploitation, it with oil, natural gas, coal is the same is all non-renewable fossil energy.Oil shale can obtain shale oil through low temperature distillation, and shale oils like crude oil, can make gasoline, diesel oil or as fuel oil.At Waste Era of Oil, the exploitation of the countries concerned to oil shale are active.Oil Shale Resources in China rich reserves, also creates a large amount of oil shale in progress of coal mining, develops oil shale and not only can alleviate contradiction between oil supply and demand, can also solve the environmental problem because abandoned oil shale causes, improve resource utilization.

At present, the oil shale Chemical Manufacture process of China, only passes through simple crushing and screening to certain grade (common is 10-80mm) to oil shale raw ore, product is directly carried out chemical industry conversion.This method makes a large amount of spoil reside in oil shale raw ore, unfavorable to subsequent transformation.Publication number disclosed in 19 days September in 2014 of China national Department of Intellectual Property is contained a kind of oil shale preliminary election discharge refuse--the distillation process of CN104194814A, disclose a kind of simple two product jigging sorting methods, but through a large amount of industrial experiments in practice, prove that the method can not carry out effective sorting to oil shale, separating effect is not had under more susceptible condition in practice, due to oil shale proportion closely Rock Specific Gravity, and the specific gravity of separation is all at 2.5 gram per centimeters ³above, conventional coal jigging technology can not be used.This technique carries out pre-discharge refuse for coarse grain (>10mm) oil shale, and for oil shale end ore deposit pre-discharge refuse technique, still belong to blank field, therefore how sorting oil shale ore deposit, end obtain good separating effect, become an industry difficult problem, be the present invention proposes the new technology of a kind of oil shale end mineral water Jie sorting by great many of experiments.

Summary of the invention

The object of the invention is the processing and utilization for ore deposit, oil shale end, a kind of simple, efficient, ore deposit, oil shale end ore-dressing technique that can significantly improve oil shale concentrate yield is provided.

The object of the present invention is achieved like this, and this oil shale beneficiation method step is as follows:

A. oil shale raw ore is carried out (10-13) mm to sieve, produce granularity and be-undersized product of (10-13) mm and granularity be+sieve of (10-13) mm on product;

B. the upper product crusher in crushing of sieve becomes broken material to being less than (10-13) mm, and mixes with undersized product;

C. mixed material adopts hydraulic classification swirler to carry out classification, produces two kinds of materials, underflow product and overflow product after classification;

D. underflow product produces spoil product and black water through high-frequency screen dehydration;

E. overflow product produces light product and black water through high-frequency screen dehydration;

F. light product carries out granulation becomes block concentrate product;

G. the black water that dehydration d. and dehydration e. obtains collects and carries out concentrating clarifying, produces primary water and enriched product;

H. enriched product becomes product from failing through press filtration, and filtrate and primary water continue to use as recirculated water jointly.

Described dehydration equipment is high-frequency screen or its equivalent screening installation.

Have employed above-mentioned ore-dressing technique, the present invention can improve the oil content of oil shale concentrate in a large number, effectively can improve ash content in refuse, simplification of flowsheet, reduces sorting cost, is ore deposit, a kind of brand-new oil shale end method for separating.The method also improves the resource utilization of oil shale, adds the economic benefit of enterprise, meets the requirement of sustainable development and energy-conserving and environment-protective, has practicality widely.

Accompanying drawing explanation

Fig. 1 is a kind of oil shale end of the present invention ore deposit mineral processing circuit figure.

In figure: 1. undersized product; 2. the upper product of sieve; 3. broken material; 4. underflow product; 5. overflow product; 6. spoil product; 7. black water; 8. black water; 9. light product; 10. piece concentrate product; 11. primary waters; 12. enriched products; 13. filtrates; 14. products from failing;

Detailed description of the invention

Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:

As shown in Figure 1, ore deposit, a kind of oil shale end of the present invention ore-dressing technique step is as follows:

A. oil shale raw ore is carried out (10-13) mm to sieve, produce granularity and be-undersized product 1 of (10-13) mm and granularity be+sieve of (10-13) mm on product 2;

B. upper product 2 crusher in crushing of sieve becomes broken material 3 to being less than (10-13) mm, and mixes with undersized product 1;

C. mixed material adopts hydraulic classification swirler to carry out classification, produces two kinds of materials, underflow product 4 and overflow product 5 after classification;

D. underflow product 4 produces spoil product 6 and black water 7 through high-frequency screen dehydration;

E. overflow product 5 produces light product 9 and black water 8 through high-frequency screen dehydration;

F. light product 9 carries out granulation becomes block concentrate product 10;

G. the black water 7,8 that dehydration d. and dehydration e. obtains collects and carries out concentrating clarifying, produces primary water 11 and enriched product 12;

H. enriched product 12 becomes product from failing 14 through press filtration, and filtrate 13 and primary water 11 continue to use as recirculated water jointly.

Though the present invention lists less embodiment, some remodeling, improvement, replacement etc. that the person skilled of this area is done the present invention, or above-mentioned embodiment does any combination change, all within protection scope of the present invention.

Claims

1. ore deposit, an oil shale end ore-dressing technique, is characterized in that this processing step is as follows:

A. oil shale raw ore is carried out (10-13) mm to sieve, produce granularity and be-undersized product (1) of (10-13) mm and granularity be+sieve of (10-13) mm on product (2);

B. upper product (2) crusher in crushing of sieve becomes broken material (3) to being less than (10-13) mm, and mixes with undersized product (1);

C. mixed material adopts hydraulic classification swirler to carry out classification, produces two kinds of materials, underflow product (4) and overflow product (5) after classification;

D. underflow product (4) produces spoil product (6) and black water (7) through high-frequency screen dehydration;

E. overflow product (5) produces light product (9) and black water (8) through high-frequency screen dehydration;

F. light product (9) carries out granulation becomes block concentrate product (10);

G. dehydration d. and dehydration e. obtains black water (7), (8) are collected and are carried out concentrating clarifying, produce primary water (11) and enriched product (12);

H. enriched product (12) becomes product from failing (14) through press filtration, and filtrate (13) and primary water (11) continue to use as recirculated water jointly.

2. ore deposit, a kind of oil shale end according to claim 1 ore-dressing technique, is characterized in that described dehydration equipment is high-frequency screen or its equivalent screening installation.