CN108273655A - A kind of coal jigging system and method - Google Patents

Abstract

The invention relates to the technical field of coal separation, in particular to a jigging coal separation system, including any one of a multi-stage jig, a dense medium cyclone or a fine coal jig arranged in sequence, and a coarse coal slime separator. Separator; the multi-stage jig is a three-stage type, including gangue separation section, medium coal separation section and clean coal separation section, and the materials after preliminary separation by the three-stage jig machine are sent to the dense medium cyclone Secondary separation is carried out by any one of the coal jigging machine or the fine coal jig, and the material obtained through the secondary separation enters the coarse coal slime separator for secondary separation. The invention also provides a jigging coal preparation method, which greatly reduces the amount of medium used for coal preparation, lowers energy consumption, reduces production costs, enables effective separation of difficult-to-separate materials, and improves the yield of clean coal.

Description

A jigging coal preparation system and method

technical field

The invention relates to the technical field of coal separation, in particular to a jigging coal separation system and method.

Background technique

The quality of coal sorting results is not only related to the nature of raw coal, the structure and operation of the sorting machine itself, but also depends to a large extent on the coal preparation process. The existing coal preparation processes mainly include full heavy medium separation process, full jigging separation process and heavy medium + jigging process. Among them, the whole heavy medium sorting process is strictly sorted according to density, and the particle size and shape affect the sorting speed. Although it can achieve a good sorting effect, it is not conducive to saving resources and energy. The disadvantages of the full jigging process are mainly reflected in the poor separation effect on difficult-to-separate coals and coals with fine particle size composition and high fine coal content, serious through-screening, and large loss of clean coal. The heavy medium + jigging process has a large amount of feed, a large amount of repeated sorting, and high production costs.

Contents of the invention

In order to solve the above technical problems, the present invention provides a jigging coal preparation system and method.

The present invention includes the following technical solutions: a jigging coal preparation system, including any one of multi-stage jiggers, dense medium cyclones or fine coal jiggers and a coarse coal slime separator arranged in sequence; The multi-stage jig machine is a three-stage type, including gangue separation section, medium coal separation section and clean coal separation section. The materials after preliminary separation by the three-stage jig machine are sent to the dense medium cyclone or fine coal Either one of the two jigs is used for secondary separation, and the material obtained through the secondary separation enters the coarse coal slime separator for secondary separation.

In addition, the present invention also provides a method for jigging coal preparation using the above-mentioned jigging coal preparation system, comprising the following steps:

(1) Prepare a multi-stage jig and lay the bed, and fill with water; the multi-stage jig is a three-stage type, including gangue sorting section, middling coal sorting section and clean coal sorting section;

(2) Prepare any one of dense medium cyclone or fine coal jig and coarse coal slime separator;

(3) Add the raw coal to the feed port of the multi-stage jig, and obtain the first-stage through-screen material and pure gangue from the gangue sorting section; obtain the second-stage through-screen material and middling coal from the medium coal sorting section, and obtain the second-stage through-screen material and medium coal from the clean coal The sorting section obtains the third-stage screened material and discharge, and the overflow of the clean coal sorting section is clean coal;

(4) Merge the first section through-sieve material into middling coal, or send it to any one of dense medium cyclone or powder coal jig to further obtain clean coal and middling coal after sorting, Send the obtained medium coal to the coarse coal slime separator for re-sorting to obtain coarse coal and clean coal;

(5) Combine the materials of the second stage of sieving, the third stage of sieving, and the discharge of the clean coal separation section into either the dense medium cyclone or the fine coal jig for separation Finally, clean coal and medium coal are obtained, and the medium coal obtained by the separation is crushed and sent to the coarse slime separator to further obtain clean coal and medium coal.

The above-mentioned technical scheme includes the following beneficial effects: the jigging coal preparation system and method provided by the present invention can fully achieve (or even exceed) the same effect as that of full-heavy medium coal preparation, and the medium consumption is lower than that of full-heavy medium coal preparation More than 70% or no medium, power consumption is reduced by more than 40%; at the same time, it overcomes the poor separation effect of the full jigging process on coal that is difficult to separate and coal with fine particle size composition and large coal content, serious through-screening, and clean coal The defect of large loss also solves the problems of high production cost of heavy medium + jigging process and serious loss of medium coal or clean coal. The jigging coal preparation method provided by the invention is convenient to operate, greatly improves the yield of clean coal, and is suitable for sorting raw coal of various coal qualities.

Description of drawings

Fig. 1 is a structural schematic diagram of a jigging coal preparation system provided by the present invention.

In the figure,

100. Multi-stage jig; 1. Feed inlet; 2. First sieve chamber; 2.1. First sieve plate; 2.2. First sieve opening; 3. Gangue discharge channel; 3.1. First discharge wheel ; 3.2, gangue discharge opening; 4, the second screen chamber; 4.1, the second sieve plate; 4.2, the second screen opening; 5, medium coal discharge channel; Coal discharge port; 6. The third sieve chamber; 6.1. The third sieve plate; 6.2. The third sieve opening; 7. Clean coal discharge channel; 7.1. The third discharge wheel; 7.2. Clean coal discharge 8. The first clapboard; 9. The second clapboard; 10. The third clapboard; 200. Heavy medium cyclone or fine coal jig; 300. Coarse slime separator.

Detailed ways

The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

Example:

This embodiment provides a jigging coal preparation system, referring to Fig. 1, including any one of a multi-stage jig 100, a dense medium cyclone or a fine coal jig 200 arranged in sequence, and a coarse coal slime separator. Separator 300; in this embodiment, the multi-stage jig can be any one of the under-screen air chamber, the screen-side air chamber or the composite air chamber.

The multi-stage jig machine is a three-stage type, including gangue sorting section, medium coal sorting section and clean coal sorting section, and the materials after preliminary sorting by the three-stage jig machine are sent to the dense medium cyclone or final Either one of the two coal jigs is used for secondary separation, and the material obtained through the secondary separation enters the coarse coal slime separator for secondary separation.

In this embodiment, the multi-stage jig includes a shell, and the top of the shell is provided with a feed port 1, and the gangue sorting section, medium coal sorting section and clean coal sorting section are sequentially arranged in the shell The gangue sorting section is divided into a first sieve chamber 2 and a gangue discharge channel 3 by a first dividing plate 8, the top of the first sieve chamber 2 is provided with a first sieve plate 2.1, and the bottom is provided with a first sieve Sieve opening 2.2, the first discharge wheel 3.1 is provided in the gangue discharge channel 3, and the gangue discharge port 3.2 is provided at the bottom; the medium coal separation section is divided into a second through-sieve chamber 4 by a second partition 9 And the medium coal discharge channel 5, the second sieve chamber 4 top is provided with a second sieve plate 4.1, the bottom is provided with a second sieve opening 4.2, and the medium coal discharge channel 5 is provided with a second discharge Wheel 5.1, the bottom of which is provided with a medium coal discharge port 5.2; the clean coal separation section is divided into a third sieve chamber 6 and a clean coal discharge channel 7 by a third partition 10, and the top of the third sieve chamber 6 A third sieve plate 6.1 is provided, a third through-sieve opening 6.2 is provided at the bottom, a third discharge wheel 7.1 is provided in the clean coal discharge channel 7, and a clean coal discharge port 7.2 is provided at the bottom. The material separated by the dense medium cyclone or the fine coal jig 200 is crushed to a particle size below 2 mm before entering the coarse coal slime separator 300 .

The steps for coal preparation using the jigging coal preparation system provided above are:

Step S1, preparing a multi-stage jig, laying a good bed, and filling it with water; the multi-stage jig is of a three-stage type, including a gangue separation section, a medium coal separation section and a clean coal separation section;

Step S2, preparing any one of dense medium cyclone or fine coal jig and coarse coal slime separator;

Step S3, adding raw coal to the feed port 1 of the multi-stage jig 100, according to the different densities, the material passes through the first sieve plate 2.1 of the gangue sorting section and then discharges the first section of sieved material, and discharges the pure coal from the gangue discharge channel 3. Gangue; discharge the second section of sieve material from the second sieve opening 4.2 of the second sieve chamber 4 of the medium coal separation section, discharge the medium coal from the medium coal discharge channel 5, and discharge the medium coal from the third section of the clean coal separation section. The sieve chamber 6 discharges the third stage through-sieve material, and the discharge material is discharged from the clean coal discharge channel, and the overflow of the clean coal separation section is clean coal.

Step S4. Merge the first-stage sieve material into medium coal, or send it to either dense medium cyclone or fine coal jig 200 for separation and further obtain clean coal and medium coal , the obtained medium coal is sent to the coarse coal slime separator 300 for further separation to obtain coarse coal and clean coal, and the medium coal is further purified so that the yield of the obtained clean coal is higher.

Step S5: Combining the second-stage through-screen material, the third-stage through-screen material, and the discharge from the clean coal separation section into a dense medium cyclone or a fine coal jig 200 for separation Clean coal and middling coal are obtained after separation, and the middling coal obtained by sorting is sent to the coarse slime separator to further obtain clean coal and middling coal. The medium coal sent into the coarse coal slime separator 300 in the steps S4 and S5 is crushed to a particle size below 2 mm.

The jigging coal preparation system and method provided in this embodiment greatly reduces the amount of medium used for coal washing, lowers energy consumption, reduces production costs, enables effective separation of difficult-to-separate materials, and increases the yield of clean coal.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. A jigging coal preparation system, characterized in that it comprises any one of a multistage jig (100), a dense medium cyclone or a fine coal jig (200) arranged in sequence and a coarse coal slime Separator (300); the multi-stage jig (100) is a three-stage type, including gangue separation section, medium coal separation section and clean coal separation section, and the materials after preliminary separation are carried out by the three-stage jig machine Send to any one of the dense medium cyclone or the fine coal jig (200) for secondary separation, and the material obtained through the secondary separation enters the coarse coal slime separator (300) for Sorting again. 2. The jigging coal preparation system according to claim 1, characterized in that, the multi-stage jig (100) comprises a housing, the top of the housing is provided with a feed port (1), and the gangue separator The selection section, the medium coal separation section and the clean coal separation section are sequentially arranged in the housing; the gangue separation section is divided into the first through-sieve chamber (2) and the gangue discharge channel (3) by the first partition (8) , the top of the first sieve chamber (2) is provided with a first sieve plate (2.1), the bottom is provided with a first sieve opening (2.2), and the gangue discharge channel (3) is provided with a first discharge wheel (3.1), the bottom of which is provided with a gangue discharge port (3.2); the medium coal separation section is divided into a second through-sieve chamber (4) and a medium coal discharge channel (5) by a second partition (9), The top of the second sieve chamber (4) is provided with a second sieve plate (4.1), the bottom is provided with a second sieve opening (4.2), and the medium coal discharge channel (5) is provided with a second discharge Wheel (5.1), with medium coal discharge port (5.2) at the bottom; the clean coal separation section is divided into the third screen chamber (6) and the clean coal discharge channel (7) by the third partition (10) , the top of the third sieve chamber (6) is provided with a third sieve plate (6.1), the bottom is provided with a third sieve opening (6.2), and the clean coal discharge channel (7) is provided with a third row of The material wheel (7.1) has a clean coal discharge port (7.2) at the bottom. 3. The jigging coal preparation system according to claim 2, characterized in that, the material selected by the dense medium cyclone or the fine coal jig (200) enters the coarse coal slime separator (300) ) before being crushed to a particle size of 2mm or less. 4. The jigging coal preparation system according to claim 1, characterized in that the multi-stage jig (100) is any one of an under-screen air chamber, a screen-side air chamber or a composite air chamber. 5. A method for jigging coal preparation using the jigging coal preparation system described in any one of claims 1 to 4, characterized in that it comprises the following steps: (1) Prepare a multi-stage jig and lay the bed, and fill with water; the multi-stage jig is a three-stage type, including gangue sorting section, middling coal sorting section and clean coal sorting section; (2) Prepare any one of dense medium cyclone or fine coal jig and coarse coal slime separator; (3) Add the raw coal to the feed port of the multi-stage jig, and obtain the first-stage through-screen material and pure gangue from the gangue sorting section; obtain the second-stage through-screen material and middling coal from the medium coal sorting section, and obtain the second-stage through-screen material and medium coal from the clean coal The sorting section obtains the third-stage screened material and discharge, and the overflow of the clean coal sorting section is clean coal; (4) Merge the first section through-sieve material into middling coal, or send it to any one of dense medium cyclone or powder coal jig to further obtain clean coal and middling coal after sorting, Send the obtained medium coal to the coarse coal slime separator for re-sorting to obtain coarse coal and clean coal; (5) Combine the materials of the second stage of sieving, the third stage of sieving, and the discharge of the clean coal separation section into either the dense medium cyclone or the fine coal jig for separation Finally, clean coal and medium coal are obtained, and the medium coal obtained by the separation is crushed and sent to the coarse slime separator to further obtain clean coal and medium coal. 6. The method according to claim 5, characterized in that, the medium coal that is sent into the coarse coal slime separator in the steps (4) and (5) is crushed to a particle size below 2mm.