CN110976062B - Coal washing process capable of improving utilization rate - Google Patents
Coal washing process capable of improving utilization rate Download PDFInfo
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- CN110976062B CN110976062B CN201911389752.0A CN201911389752A CN110976062B CN 110976062 B CN110976062 B CN 110976062B CN 201911389752 A CN201911389752 A CN 201911389752A CN 110976062 B CN110976062 B CN 110976062B
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- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
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Abstract
The invention provides a coal washing process for improving the utilization rate, wherein one raw coal is set, when the weight of the raw coal is set as M, the weight of impurities is M0, the weight of clean coal components is M-M0, and the clean coal rate is A-M/M; conveying raw coal M with preset weight to a coal washer through a conveying belt; raw coal enters the coal washer, a coal outlet at the lower end of the coal washer is closed, a heavy suspension liquid pump is opened, heavy suspension liquid with preset weight M1 is injected into the coal washer, clean coal and suspension liquid enter the upper part through a filter plate, middlings and gangue sink to the bottom and move downwards through a first oil cylinder for a first preset distance D1, meanwhile, the clean coal and the suspension liquid are enabled to fully stay at the upper end, the coal outlet is opened, liquid at the lower end, the middlings and impurities enter a coal storage trolley below the coal storage trolley, and the weight of the coal storage trolley is (M1+ M)/5.
Description
Technical Field
The invention relates to the technical field of coal washing, in particular to a coal washing process capable of improving the utilization rate.
Background
Coal washing is an indispensable procedure for coal deep processing, coal directly mined from a mine is called raw coal, a plurality of impurities are mixed in the raw coal during mining, the quality of the coal is different, and the coal with small inherent ash content and the coal with large inherent ash content are mixed together. Coal washing is an industrial process for removing impurities in raw coal or classifying high-quality coal and low-quality coal.
The existing coal washing process mainly separates clean coal, middlings and gangue through a three-product dense medium cyclone, and then carries out dehydration and medium removal to form a product. The heavy medium cyclone separation is completed in a centrifugal force field by utilizing the Archimedes principle, after materials enter the cyclone, under the action of centrifugal force, particles with different densities are dispersed along the radial direction, light and heavy particles respectively move to a density surface with similar density to enter an upward flow or a downward flow and are discharged from a bottom flow port or an overflow port.
In the process of separating light and heavy particles and washing coal, because of the existence of different light and heavy coals, the coal washing effect is poor and the utilization rate is low.
Disclosure of Invention
The invention aims to provide a coal washing process with improved utilization rate, so as to solve the technical problems.
In order to achieve the purpose, the invention provides a coal washing process for improving the utilization rate, which comprises the following steps:
setting one of raw coals, wherein when the weight of the raw coal is set as M, the weight of impurities is M0, the weight of clean coal components is M-M0, and the clean coal rate is A-M/M;
conveying raw coal M with preset weight to a coal washer through a conveying belt;
raw coal enters the coal washer, a coal outlet at the lower end of the coal washer is closed, a heavy suspension liquid pump is opened, heavy suspension liquid with preset weight M1 is injected into the coal washer, clean coal and suspension liquid enter the upper part through a filter plate, middlings and gangue sink to the bottom and move downwards through a first oil cylinder for a first preset distance D1, meanwhile, the clean coal and the suspension liquid fully stay at the upper end, the coal outlet is opened, liquid at the lower end, middlings and impurities enter a coal storage trolley below the coal storage trolley until the weight of the coal storage trolley is (M1+ M)/5;
and closing the coal outlet, discharging the liquid of the coal storage trolley, obtaining the weight M11 of the coal in the trolley, judging M11/M, if the weight is larger than or equal to A/5, continuously opening the inorganic salt inlet to inject inorganic salt with the weight of M1 into the coal washer so as to separate clean coal in the coal washer, discharging the liquid through the liquid outlet on the lower side of the coal washer, and discharging residual coal from the coal outlet on the lower end.
Further, if the weight of coal in the coal storage trolley is obtained, M11 is judged, M11/M is judged, if the weight of coal in the coal storage trolley is smaller than A/5, the first oil cylinder drives the filter plate to move downwards for a second preset distance D2 and reciprocate back and forth for 10-20 times to cut raw coal, the filter plate is enabled to stay at a distance from D1+ D2, the weight of small coal blocks is increased by cutting large coal blocks, meanwhile, clean coal and suspension liquid are enabled to stay at the upper end fully, a coal outlet is opened, liquid at the lower end, middlings and impurities enter the coal storage trolley below the coal storage trolley, and the weight of the coal storage trolley is (M1+ M)/5.
And further, closing the coal outlet, discharging the liquid of the coal storage trolley to obtain the weight M11 of the coal in the trolley, judging the weight M11/M, if the weight is larger than or equal to A/5, continuously opening an inorganic salt inlet to inject inorganic salt with the weight M1 into the coal washer so as to further separate clean coal in the coal washer, discharging the liquid through a liquid outlet on the lower side of the coal washer, and discharging residual coal through a coal outlet on the lower end.
Further, if the weight of coal in the coal storage trolley is obtained, M11 is judged, M11/M is judged, if the weight of coal in the coal storage trolley is smaller than A/5, the filter plate is driven by the first oil cylinder to move downwards for a third preset distance D3 and reciprocates back and forth for 10-20 times, raw coal is cut, the filter plate is made to stay at a distance from the filter plate D1+ D2+ D3, the weight of small coal is increased by cutting large coal, clean coal and suspension liquid are made to stay at the upper end fully, a coal outlet is opened, liquid at the lower end, middlings and impurities enter the coal storage trolley below the coal storage trolley, and the weight of the coal storage trolley is (M1+ M)/5.
And further, closing the coal outlet, discharging the liquid of the coal storage trolley to obtain the weight M11 of the coal in the trolley, judging the weight M11/M, if the weight is larger than or equal to A/5, continuously opening the inorganic salt inlet to inject inorganic salt with the weight M1 into the coal washer so as to further separate clean coal in the coal washer, discharging the liquid through the liquid outlet on the lower side of the coal washer, and discharging residual coal through the coal outlet on the lower end.
Further, if the weight of the coal in the coal storage trolley is M11, judging M11/M, if the weight of the coal in the coal storage trolley is less than A/5, the clean coal component of the raw coal component cannot reach a preset standard, opening the coal outlet, discharging all the coal, re-blending the coal according to the preset weight M of the batch of raw coal, and obtaining the weight of the raw coal according to the raw coal with high clean coal content, wherein the weight of the raw coal is M00:
M00＝(M11/M-A/5)xM
and mixing the weight M00 of the raw coal obtained from the raw coal with high clean coal content with the preset weight M of the batch of raw coal to obtain new raw coal, obtaining the new weight M of the raw coal aiming at the new raw coal, and continuously washing the coal through the process.
Further, the conveyor belt conveys the crushed raw coal into the stirrer, the conveyor belt is provided with a first weight sensor, the weight of the conveyed raw coal is detected in real time, and the conveying is stopped when the detected weight of the raw coal is M.
Further, the stirrer is used for stirring and separating raw coal, large blocks of raw coal are left in the middle through the rotation of the middle rotating shaft, and small blocks of raw coal are left at the edge of the stirrer;
a coal outlet is formed in the center of the lower end of the stirrer and used for discharging raw coal;
and a buffer cavity is arranged below the coal outlet, an opening is formed in the lower end of the buffer cavity, and raw coal passes through the buffer cavity to be fully mixed into large and small pieces of raw coal and is continuously discharged downwards into the coal washer.
Furthermore, a conical coal inlet is formed in the middle of the coal washer, a group of first oil cylinders are arranged in the coal washer, the lower end of each first oil cylinder is connected with a filter plate, and the filter plates can allow small-particle coal or impurities to pass through;
the lower extreme of filter still is provided with a plurality of coal washing sword, the lower extreme of coal washing sword sets up a plurality of teeth, and it can cut the raw coal, makes the raw coal smash, if the clean coal weight of raw coal can not reach preset weight, then cuts the raw coal through the downward motion of coal washing sword, fully cuts up the raw coal.
Furthermore, a coal outlet is formed in the lower end of the coal washer and used for discharging coal blocks and impurities with large weight;
a coal storage trolley is arranged below the coal outlet, and a weighing second weight sensor is arranged on the coal storage trolley and used for weighing the falling coal blocks with larger weight, impurities and water to obtain the weight M1;
one side of the coal washer is provided with an inorganic salt pump for inputting inorganic salt solution into the coal washer; and a heavy suspension liquid pump is arranged on the other side of the coal washer and inputs the heavy suspension liquid into the coal washer.
Compared with the prior art, the coal washing process with the improved utilization rate has the advantages that through the coal washing process, coal washing with high utilization rate can be carried out on raw coal, the raw coal is in line with clean coal with a certain content, coal blending can be carried out again according to a coal washing result, the clean coal with the preset weight can be obtained according to the raw coal with the preset weight, and the coal washing with the optimal efficiency is achieved.
Particularly, raw coal enters the coal washer, a coal outlet at the lower end of the coal washer is closed, a heavy suspension liquid pump is opened, heavy suspension liquid with preset weight M1 is injected into the coal washer, clean coal and the suspension liquid enter the upper part of the coal washer through a filter plate, middlings and gangue sink to the bottom of the coal washer, the clean coal and the suspension liquid are made to fully stay at the upper end of the coal washer while moving downwards for a first preset distance D1 through a first oil cylinder, the coal outlet is opened, liquid at the lower end, the middlings and impurities enter a coal storage trolley below the coal storage trolley until the weight of the coal storage trolley is (M1+ M)/5; and closing the coal outlet, discharging the liquid of the coal storage trolley, obtaining the weight M11 of the coal in the trolley, judging M11/M, if the weight is larger than or equal to A/5, continuously opening the inorganic salt inlet to inject inorganic salt with the weight of M1 into the coal washer so as to separate clean coal in the coal washer, discharging the liquid through the liquid outlet on the lower side of the coal washer, and discharging residual coal from the coal outlet on the lower end.
In particular, the invention can mix coal first and then screen, mix different kinds of raw coal according to the appropriate proportion, presume N kinds of raw coal, presume the weight of raw coal is M, the weight of impurity is M0 for each kind of coal, the weight of the clean coal ingredient is M-M0, the clean coal rate is A-M/M; and measuring the clean coal components according to the weight M of the raw coal to determine the effect of coal washing, and when the weight of the clean coal components is not met, re-washing the coal.
Particularly, the lower end of the filter plate is also provided with a plurality of coal washing knives, the lower ends of the coal washing knives are provided with a plurality of teeth, the coal washing knives can cut raw coal to crush the raw coal, and if the weight of clean coal of the raw coal cannot reach the preset weight, the coal washing knives move downwards to cut the raw coal so as to fully crush the raw coal.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic overall view of a coal washing apparatus with improved utilization according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the invention, and do not limit the scope of the invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, which is an overall schematic diagram of a coal washing apparatus with an improved utilization rate according to an embodiment of the present invention, in the coal washing process of this embodiment, raw coal is first sieved, mixed materials with different particle sizes are divided into various size fractions by a perforated sieve surface, the raw coal is crushed into coal with a preset particle size by a crusher, in this step, coal blending and sieving are performed, different types of raw coal are mixed according to a proper ratio, N types of raw coal are set, when the raw coal weight is set as M for each type of coal, the impurity weight is M0, the weight of the components of the clean coal is M-M0, and the clean coal rate is a-M/M. Therefore, the embodiment of the invention measures the clean coal composition according to the weight M of the raw coal to determine the effect of coal washing, and when the weight of the clean coal composition is not satisfied, the coal washing is carried out again.
Referring to fig. 1, the coal washing apparatus of the present embodiment includes a conveyor belt 10 for conveying crushed raw coal into a mixer 1, wherein a first weight sensor 50 is disposed on the conveyor belt 10 for detecting the weight of the conveyed raw coal in real time, and the conveyor belt stops conveying when the detected weight of the raw coal is M.
As shown in fig. 1, the mixer 1 of the present embodiment is used to mix and separate raw coal, and the middle shaft rotates to retain large pieces of raw coal in the middle and small pieces of raw coal at the edge of the mixer, so as to facilitate downward leakage. The center of the lower end of the stirrer 1 of the embodiment is provided with a coal outlet 13 for discharging raw coal; a buffer cavity 21 is arranged below the coal outlet 13, an opening 22 is arranged at the lower end of the buffer cavity 21, and the raw coal passes through the buffer cavity so as to be fully mixed into large and small pieces of raw coal and is continuously discharged downwards into the coal washer 3.
With continued reference to fig. 1, the coal washer 3 of this embodiment has a tapered coal inlet 33 disposed in the middle thereof to allow raw coal to enter the cavity of the coal washer. A group of first oil cylinders 31 are arranged in the coal washer, the lower end of each first oil cylinder 31 is connected with a filter plate 32, and the filter plates can allow small-particle coal or other impurities to pass through; the tapered coal inlet 33 communicates with an opening in the filter plate 32 to guide raw coal into the cavity 38 at the lower end of the filter plate 32. The lower end of the filter plate 32 is also provided with a plurality of coal washing knives 34, and the lower end of each coal washing knife is provided with a plurality of teeth 37 which can cut raw coal to crush the raw coal. In this embodiment, if the clean coal weight of the raw coal does not reach the preset weight, the raw coal is cut by the downward movement of the coal washing knife 34, and the raw coal is sufficiently cut.
With continued reference to fig. 1, the coal washer 3 of the present embodiment is provided with a coal outlet 39 at the lower end thereof for discharging coal blocks and impurities with large weight, such as gangue or middlings. A coal storage trolley 51 is arranged below the coal outlet 39, and a weighing second weight sensor 52 is arranged on the coal storage trolley and used for weighing the falling coal blocks with larger weight, impurities and water to obtain the weight M1. The lower end of the coal washer 3 is also provided with a supporting seat 4 for supporting the coal washer.
With continued reference to fig. 1, an inorganic salt pump 35 is disposed at one side of the coal washer of the present embodiment, and correspondingly, an inorganic salt input port 36 is disposed at one side of the corresponding coal washer for inputting an inorganic salt solution into the coal washer; a heavy suspension pump 351 is arranged on the other side of the coal washer, and the heavy suspension pump 351 inputs the heavy suspension into the coal washer 3.
Specifically, raw coal in the mixer enters the coal washer 3, the coal outlet 39 is closed, the heavy suspension pump 351 is opened, heavy suspension with preset weight M1 is injected into the coal washer, clean coal and suspension enter the upper part through the filter plate 32, middlings and gangue sink to the bottom, the middlings and gangue move downwards through the first oil cylinder 31 by a first preset distance D1, the large coal is cut, the weight of small coal is increased, meanwhile, the clean coal and the suspension are fully stopped at the upper end, the coal outlet is opened, liquid at the lower end, middlings and impurities enter the coal storage trolley 51 below the coal storage trolley, and the weight of the coal storage trolley is (M1+ M)/5. And closing the coal outlet, discharging the liquid of the coal storage trolley, obtaining the weight M11 of the coal in the trolley, judging M11/M, if the weight is larger than or equal to A/5, continuously opening the inorganic salt inlet to inject inorganic salt with the weight of M1 into the coal washer so as to further separate clean coal in the coal washer, discharging the liquid through the liquid outlet 30 on the lower side of the coal washer, and discharging residual coal from the coal outlet 39 on the lower end. And then, through the preliminary weighing mode, the utilization rate of the corresponding coal washing process which can reach the basic preset standard can be obtained, and then the coal is washed through the mode.
Specifically, if the weight of coal in the trolley is obtained as M11, M11/M is judged, if the weight of coal in the trolley is less than A/5, the filter plate is driven by the first oil cylinder 31 to move downwards for a second preset distance D2 and reciprocates back and forth for 10-20 times to cut raw coal, the filter plate is stopped at a distance from D1+ D2, the weight of small coal blocks is increased by cutting large coal blocks, clean coal and suspension liquid are fully stopped at the upper end, a coal outlet is opened, liquid at the lower end, middlings and impurities enter the coal storage trolley 51 below the coal storage trolley, and the weight of the coal storage trolley is (M1+ M)/5. And closing the coal outlet, discharging the liquid of the coal storage trolley, obtaining the weight M11 of the coal in the trolley, judging M11/M, if the weight is larger than or equal to A/5, continuously opening the inorganic salt inlet to inject inorganic salt with the weight of M1 into the coal washer so as to further separate clean coal in the coal washer, discharging the liquid through the liquid outlet 30 on the lower side of the coal washer, and discharging residual coal from the coal outlet 39 on the lower end.
Specifically, if the weight of coal in the trolley is obtained M11, M11/M is judged, if the weight of the coal in the trolley is less than A/5, the filter plate is driven by the first oil cylinder 31 to move downwards for a third preset distance D3 and reciprocates back and forth for 10-20 times to cut raw coal, the filter plate is stopped at a distance from the filter plate D1+ D2+ D3, the weight of small coal blocks is increased by cutting large coal blocks, clean coal and suspension liquid are made to fully stop at the upper end, a coal outlet is opened, liquid at the lower end, middlings and impurities enter the coal storage trolley 51 below the coal storage trolley, and the weight of the coal storage trolley is (M1+ M)/5. And closing the coal outlet, discharging the liquid of the coal storage trolley, obtaining the weight M11 of the coal in the trolley, judging M11/M, if the weight is larger than or equal to A/5, continuously opening the inorganic salt inlet to inject inorganic salt with the weight of M1 into the coal washer so as to further separate clean coal in the coal washer, discharging the liquid through the liquid outlet 30 on the lower side of the coal washer, and discharging residual coal from the coal outlet 39 on the lower end.
Specifically, if the weight of coal in the trolley is acquired as M11, M11/M is judged, if the weight is less than a/5, the clean coal component of the raw coal component cannot reach the preset standard, the coal outlet 39 is opened, all the coal is discharged, the coal is re-blended according to the preset weight M of the batch of raw coal, and the weight of the raw coal is acquired as M00 according to the raw coal with high clean coal content:
M00＝(M11/M-A/5)xM
and mixing the weight M00 of the raw coal obtained from the raw coal with high clean coal content with the preset weight M of the batch of raw coal to obtain new raw coal, obtaining the new weight M of the raw coal aiming at the new raw coal, and continuously washing the coal through the process.
Specifically, according to the coal washing process, coal washing with high utilization rate can be carried out on raw coal, the raw coal is in accordance with the clean coal with a certain content, and coal blending can be carried out again according to the coal washing result, so that the clean coal with the preset weight can be obtained according to the raw coal with the preset weight, and the coal washing with the optimal efficiency is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, and alterations can be made in these embodiments without departing from the principles and spirit of the invention.
Claims (10)
1. A coal washing process for improving utilization rate is characterized by comprising the following steps:
setting one of raw coals, setting the weight of impurities as M0 when the weight of the raw coal is M, setting the weight of clean coal components as M = M-M0, and setting the clean coal rate as A = M/M;
conveying raw coal with a preset weight M to a coal washer through a conveying belt;
raw coal enters the coal washer, a coal outlet at the lower end of the coal washer is closed, a heavy suspension pump is opened, heavy suspension with preset weight M1 is injected into the coal washer, clean coal and the heavy suspension enter the upper part of the coal washer through a filter plate in the coal washer, middlings and gangue sink to the bottom of the coal washer, and the middlings and the gangue move downwards for a first preset distance D1 through a first oil cylinder in the coal washer, so that the clean coal and the heavy suspension fully stay at the upper end in the coal washer, a coal outlet is opened, liquid at the lower end in the coal washer, the middlings and impurities enter a coal storage trolley below the coal washer until the weight of the coal storage trolley is (M1+ M)/5;
and closing the coal outlet, discharging the liquid of the coal storage trolley, obtaining the weight M11 of the coal in the trolley, judging M11/M, if the weight is larger than or equal to A/5, continuously opening an inorganic salt inlet to inject inorganic salt with the weight of M1 into the coal washer so as to separate clean coal in the coal washer, discharging the liquid through a liquid outlet on the lower side of the coal washer, and discharging the residual coal from the coal outlet on the lower end of the coal washer.
2. The coal washing process for improving the utilization rate of the coal as claimed in claim 1, wherein if the weight of the coal in the coal storage trolley is M11, the judgment is M11/M, if the weight of the coal is less than A/5, the first oil cylinder drives the filter plate to move downwards for a second preset distance D2, the reciprocating motion is performed for 10-20 times, the raw coal is cut, the filter plate is stopped at a distance from the filter plate D1+ D2, the weight of the small coal is increased by cutting the large coal, meanwhile, the clean coal and the heavy suspension are sufficiently stopped at the upper end, the coal outlet is opened, the liquid at the lower end, the medium coal and the impurities enter the coal storage trolley below, and the weight of the coal storage trolley is (M1+ M)/5.
3. The coal washing process with the improved utilization rate as claimed in claim 2, wherein the coal outlet is closed, liquid in the coal storage trolley is discharged, the weight of coal in the trolley is obtained, M11 is judged, M11/M is judged, if the weight of the coal is greater than or equal to A/5, the inorganic salt inlet is continuously opened to inject inorganic salt with the weight of M1 into the coal washing machine, clean coal in the coal washing machine is further separated, the liquid is discharged through the liquid outlet on the lower side of the coal washing machine, and residual coal is discharged from the coal outlet on the lower end.
4. The coal washing process for improving the utilization rate of the coal as claimed in claim 3, wherein if the weight of the coal in the coal storage trolley is M11, the judgment is M11/M, if the weight of the coal is less than A/5, the first oil cylinder drives the filter plate to move downwards for a third preset distance D3 and reciprocate back and forth for 10-20 times, the raw coal is cut, the filter plate is stopped at a distance from the filter plate D1+ D2+ D3, the weight of the small coal blocks is increased by cutting the large coal blocks, meanwhile, the clean coal and the heavy suspension liquid are fully stopped at the upper end, the coal outlet is opened, the liquid at the lower end, the medium coal and impurities enter the coal storage trolley below the coal storage trolley, and the weight of the coal storage trolley is (M1+ M)/5.
5. The coal washing process with the improved utilization rate as claimed in claim 4, wherein a coal outlet is closed, liquid in the coal storage trolley is discharged, the weight of coal in the trolley is obtained, M11 is judged, M11/M is judged, if the weight of the coal is greater than or equal to A/5, an inorganic salt input port is continuously opened to inject inorganic salt with the weight of M1 into the coal washing machine, clean coal in the coal washing machine is further separated, the liquid is discharged through a liquid discharge port on the lower side of the coal washing machine, and residual coal is discharged from a coal outlet at the lower end.
6. The coal washing process for improving the utilization rate of the coal as claimed in claim 5, wherein if the weight of the coal in the coal storage trolley is obtained as M11, the judgment is made as M11/M, if the weight of the coal is less than A/5, the clean coal component of the raw coal component cannot reach the preset standard, the coal outlet is opened, all the coal is discharged, the coal is re-blended according to the preset weight M of the raw coal, and the weight of the raw coal is obtained as M00:
M00=（M11/M- A/5）x M
and mixing the raw coal with high clean coal content with the weight M00 of the raw coal and the preset weight proportion of the raw coal to obtain new raw coal, obtaining the new weight M of the raw coal aiming at the new raw coal, and continuing to wash the coal through the process.
7. The coal washing process with the improved utilization rate of the claim 6, wherein the conveyor belt conveys the crushed raw coal to the stirrer, a first weight sensor is arranged on the conveyor belt, the weight of the conveyed raw coal is detected in real time, and the conveying is stopped when the detected weight of the raw coal is M.
8. The coal washing process with the improved utilization rate as claimed in claim 7, wherein the stirrer is used for stirring and separating raw coal, small blocks of raw coal are left in the middle and large blocks of raw coal are left at the edge of the stirrer by rotating a middle rotating shaft;
a coal outlet is formed in the center of the lower end of the stirrer and used for discharging raw coal;
and a buffer cavity is arranged below the coal outlet, an opening is formed in the lower end of the buffer cavity, and raw coal passes through the buffer cavity to be fully mixed into large and small pieces of raw coal and is continuously discharged downwards into the coal washer.
9. The coal washing process for improving the utilization rate of the coal washer according to claim 7, wherein a conical coal inlet is arranged in the middle of the coal washer, a group of first oil cylinders are arranged in the coal washer, the lower ends of the first oil cylinders are connected with a filter plate, and the filter plate can allow small-particle coal or impurities to pass through;
the lower extreme of filter still is provided with a plurality of coal washing sword, the lower extreme of coal washing sword sets up a plurality of teeth, and it can cut the raw coal, makes the raw coal smash, if the clean coal weight of raw coal can not reach preset weight, then cuts the raw coal through the downward motion of coal washing sword, fully cuts up the raw coal.
10. The coal washing process with the improved utilization rate as claimed in claim 9, wherein a coal outlet is formed at the lower end of the coal washer and is used for discharging coal blocks with larger weight and impurities;
a coal storage trolley is arranged below the coal outlet, and a weighing second weight sensor is arranged on the coal storage trolley and used for weighing the falling coal blocks with larger weight, impurities and water to obtain the weight M1;
one side of the coal washer is provided with an inorganic salt pump for inputting inorganic salt solution into the coal washer; and a heavy suspension liquid pump is arranged on the other side of the coal washer and inputs the heavy suspension liquid into the coal washer.
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| US4198289A (en) * | 1978-08-07 | 1980-04-15 | Elliott Guy R B | Mobile, waterless, coal and mineral separating method |
| JP2004081940A (en) * | 2002-08-23 | 2004-03-18 | Chikoji Gakuen | Recovery treatment method for outflow oil |
| CN101468329A (en) * | 2007-12-29 | 2009-07-01 | 唐山易通科技开发有限公司 | Air impulsive motion dense medium fluidized bed and sorting method thereof |
| CN101837320B (en) * | 2010-04-09 | 2013-04-03 | 芬雷选煤工程技术(北京)有限公司 | Heavy medium coal preparation control equipment, density control system thereof and density control method |
| CN203076067U (en) * | 2013-01-28 | 2013-07-24 | 中国煤炭进出口公司 | Medium preparation device used for dense-medium separation |
| CN203556457U (en) * | 2013-11-01 | 2014-04-23 | 中国矿业大学 | Novel dense medium shunting box for coal dressing |
| CN206454776U (en) * | 2017-01-14 | 2017-09-01 | 泰富重工制造有限公司 | A kind of equipment for controlling dense-medium separation suspension |
| CN109718945A (en) * | 2018-12-29 | 2019-05-07 | 中国神华能源股份有限公司 | Hm coal preparation plant intelligently adds Jie's system and method |
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2019
- 2019-12-30 CN CN201911389752.0A patent/CN110976062B/en active Active
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