CN103206718B - System and method for improving slurry property of low order coal slurry - Google Patents
System and method for improving slurry property of low order coal slurry Download PDFInfo
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- CN103206718B CN103206718B CN201310121917.2A CN201310121917A CN103206718B CN 103206718 B CN103206718 B CN 103206718B CN 201310121917 A CN201310121917 A CN 201310121917A CN 103206718 B CN103206718 B CN 103206718B
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Abstract
The invention discloses a system and a method for improving slurry property of low order coal slurry. The system includes a powder making system and a fine powder separating system. The powder making system comprises two vertical mill mechanisms. The vertical mill mechanisms are connected with bucket elevators which are respectively connected with a coarse powder finished product cabin and a fine powder finished product cabin. The fine powder separating system comprises a buffering cabin connected with the fine powder finished product cabin. The buffering cabin is communicated with a first grader and a second grader in sequence. The first grader and the second grader are respectively communicated with a coarse powder collecting cabin and a super fine powder collecting cabin. The coarse powder finished product cabin is communicated with a slurry mixing system through a dense phase conveying device; and the fine buffering cabin is communicated with the slurry mixing system through a conveying belt. The method includes three parts of coarse powder preparation, fine powder separation and extraction, and high-density coal slurry preparation. By collocating proportion of coarse coal powder and fine coal powder, deposition efficiency of coal powder is improved, distribution of coal powder after being mixed is close to an Alfred model; and slurry property of low order coal slurry is improved through graduation.
Description
Technical field
The invention belongs to COAL-WATER SLURRY TECHNOLOGY field, relate to a kind of system and method improving slurry property of low order coal slurry.
Background technology
Coal is the main energy sources of China, can not change within following considerable time.Country implements Filter Tuber For Clean Coal plan, using clean coal technology as raising coal utilization efficiency, reduce the important means of environmental pollution, be just subject to various circles of society and more and more paying close attention to, the clean coal technology that development comprises COAL-WATER SLURRY TECHNOLOGY is the urgent task of pendulum in face of compatriots.Controlling coal and utilizing the energy-saving and emission-reduction of process, is inevitable requirement and the realistic choice of the Implement of sustainable development energy strategy.
Shenfu coal is low ash, special low-sulfur, low-phosphorous, the high-quality thermal coal of middle golf calorific value.Shenfu coalfield is one of especially big coalfield of China, and therefore promote shenfu coal Appropriate application, the structure that utilizes improving shenfu coal is the realistic choice realizing sustainable development source strategy.Water-coal-slurry is as a kind of New type coal base fluid state clean fuel, and have the flow behavior that oil is the same, and have the combustion characteristics more more superior than raw coal, but shenfu coal degree of metamorphism is low, belong to difficult pulping coal, slurrying concentration generally can only reach 60%.There is following shortcoming in low concentration of water coal slurry:
(1) use as boiler combustion, caloric value is low, reduces the efficiency of combustion of boiler.
(2) for the present situation of North Shaanxi lack of water, preparation low concentration of water coal slurry meaning needs more water resource.
(3) low concentration of water coal slurry adds cost of transportation.
(4) as gasification water-coal-slurry, low concentration of water coal slurry (lower than 60%) causes coal water slurry gasification coal consumption and oxygen to consume high, directly has influence on cold gas efficiency.
(5) high-concentration coal-water slurry stability is obviously better than low concentration of water coal slurry.
Therefore improve slurry property of low order coal slurry, improve low-order coal water coal slurry concentration and just seem particularly important in the clean utilization of promotion shenfu coal, Development of Coal gasification technology.
The factor affecting coal paste-forming properties is a lot, and wherein " grating " technology improves coal dust deposition efficiency, prepares the key technology of high-concentration coal-water slurry.About the Mathematical Modeling of grating comprises: Rosin-Rammler, Gaudin-Schuhmann, and Alfred model.Alfred model has good universality, and has good compatibility with size distribution detector, can be used for the paste-forming properties instructing the water-coal-slurry improving low-order coal.The advantage of dry method powder process is to have stronger controllability to the size distribution of coal dust: the size distribution being controlled coal dust by adjustment technical parameter, utilizing Alfred model to instruct thickness coal dust blend proportion, is that we improve the basic ideas of low-order coal water coal slurry concentration.
Summary of the invention
The object of this invention is to provide a kind of system and method improving slurry property of low order coal slurry, system solves the problem problems of the prior art, by adopting two vertical mill system to make coal dust possess higher deposition efficiency, adding the output of coal dust; Decreasing coal dust moisture by drying, adding the paste-forming properties of coal dust.This device systems environmental protection, noise be low, improve production operation environment, and ensured safety in production, the control reaching accurate quantification is sized mixing.Its equipment is applicable to the water-coal-slurry preparing various height, middle concentration.Low-order coal water coal slurry concentration can be improved at least 3% by the method, and this process achieves suitability for industrialized production.
The technical solution adopted in the present invention is:
A kind of system improving slurry property of low order coal slurry, comprise pulverized coal preparation system and fine powder piece-rate system, described pulverized coal preparation system comprises and to be communicated with by the storehouse ribbon conveyer coal conveyer belt of the conveying raw coal be connected successively, surge bunker, weighing coal feeder the Liang Tao vertical mill mechanism that Vertical Mill drier forms with vertical grinder and vertical grinder; Described vertical grinder is connected to 1# pulse bag dust arrester installation, 1# pulse bag dust arrester installation connects bucket elevator by batcher, bucket elevator is connected to meal finished bin and fine powder finished bin respectively, and meal finished bin and fine powder finished bin are respectively arranged with 2# pulse bag dust arrester installation;
Described fine powder piece-rate system comprises the surge bunker be connected with fine powder finished bin, and surge bunker is communicated with one-level grader and secondary grader successively, and one-level grader and secondary grader are communicated with fines collection storehouse and superfine powder collecting bin respectively; Secondary grader is communicated with 4# pulse bag dust arrester installation;
Described meal finished bin is communicated to blended size system by Condensed transportation device; Described fines collection storehouse is communicated to blended size system by conveyer belt.
Further, in described pulverized coal preparation system, Vertical Mill drier comprises hot-blast stove, and hot-blast stove is by 1# screw pump connection stokehold water-coal-slurry tank for hot-blast stove provides the energy, and hot-blast stove is communicated with vertical grinder by dust arrester.
Further, in described pulverized coal preparation system, 1# pulse bag dust arrester installation is connected with compressed air system by ventilation blower with 2# pulse bag dust arrester installation; In described fine powder piece-rate system, 4# pulse bag dust arrester installation is communicated with marsupial respectively and gathers dust collecting bin and air-introduced machine.
Further, in described pulverized coal preparation system, in 1# pulse bag dust arrester installation and 2# pulse bag dust arrester installation and vertical grinder, meal finished bin and fine powder finished bin, be provided with CO
2fire extinguishing system.
Further, in described pulverized coal preparation system, batcher comprises minor spiral batcher and king bolt batcher, and minor spiral batcher is positioned at below 1# pulse bag dust arrester installation, king bolt batcher is positioned at below minor spiral batcher, and king bolt batcher is connected with minor spiral batcher.
Further, in described fine powder piece-rate system, surge bunker is provided with 3# pulse bag dust arrester installation.
Correspondingly, the present invention gives a kind of method improving slurry property of low order coal slurry, comprises the steps:
A. the preparation of meal:
1) the foam coal of material size < 50mm is quantitatively added vertical grinder by weighing coal feeder, simultaneously through hot-blast stove hot blast out by entering in mill from vertical grinder after dust arrester dedusting, at two cover vertical grinders, to grind out meso-position radius be respectively the fine powder of 20 μm and meso-position radius to feed coal is the meal of 80 μm;
2) by adjustment Vertical Mill in negative pressure and separator rotating speed, by do not meet meso-position radius be 80 μm meal from cone bucket fall mill grinding again; Meso-position radius is that the meal of 80 μm trips out mill with air-flow one, collects, deliver to meal finished bin by batcher through bucket elevator through pulse bag collection device, for subsequent use;
3) through vertical grinder grind out meso-position radius be 20 μm fine powder through pulse bag collection device collect, deliver in fine powder finished bin by batcher through bucket elevator;
B. the separation and acquisition of superfine powder:
1) by helical feed mode, the fine powder in fine powder finished bin is delivered in the surge bunker of fine powder piece-rate system;
2) meso-position radius is that the fine powder of 20 μm carries out superfine powder separation further by the one-level grader in fine powder piece-rate system, wherein the meal carried secretly in fine powder is separated by one-level grader, be collected in meal collecting bin, and turn back to system meal finished bin from meal collecting bin;
3) fine powder carries meso-position radius secretly is that the ultra-fine grain coal dust of 4-6 μm enters secondary grader and carries out secondary grading, and the superfine powder that wherein secondary grader is separated is collected in superfine powder collecting bin respectively and is collected in bag through 4# pulse bag dust arrester installation and gathers dust in collecting bin and use for grating of sizing mixing;
C. the preparation of high-concentration coal-water slurry:
The superfine powder of the meal in meal finished bin and superfine powder collecting bin and bag being gathered dust in collecting bin mixes according to the ratio that mass ratio is 2:1, be added to tank of sizing mixing after being mixed by agitator, in tank of sizing mixing, add water-coal-slurry mass percent respectively is the dispersant of 0.6% and the stabilizing agent of 0.1% simultaneously; Stir slaking after 3 hours, through the sieved filter of pressure filtration, eventually pass shear pump and shear, deliver to finished pot; Finished product is delivered to tank before hot-blast stove stokehold tank or Boiler Furnace.
Further, in described method, dispersant is the large slurries additive agent NDF in south.
Further, in described method, stabilizing agent is the large sodium cellulose glycolate stabilizing agent in south.
The invention has the beneficial effects as follows:
(1) adopt two vertical mill system to foam coal grinding, realize controlling coal powder size by negative pressure in the rotating speed of adjustment Vertical Mill separator and Vertical Mill, simultaneously two vertical mill system can realize thickness and carries out respectively roughly grinding and fine grinding, respective storage, thus realize that granularity controllability is strong, production environment good (noise relatively low, subnormal ambient decrease floating dust).
(2) adopt gas classification machine to be extracted by the coal dust of fine powder from vertical mill system output, scrap build is little, drops into low.
(3) by the collocation of thickness coal dust ratio, improve the deposition efficiency of coal dust, make the distribution of coal dust after mixing more close to Alfred model, improve the paste-forming properties of low-order coal by " grating ".
(4) coal dust is through dry method grating, can packedly transport, and realizes stokehold slurrying, has saved cost of transportation.
(5) water coal slurry stability after grating is high, solves transport, the sedimentation problem deposited in process.
Accompanying drawing explanation
Fig. 1 is present device system flow block diagram.
Fig. 2 is non-grating particle-size distribution of coal-water slurry figure.
Fig. 3 is through grating water-coal-slurry grading curve distribution map.
In figure: 1. coal conveyer belt; 2. raw material surge bunker; 3. weighing coal feeder; 4. vertical grinder; 5.1# pulse bag dust arrester installation; 6. minor spiral batcher; 7. king bolt batcher; 8. bucket elevator; 9. meal finished bin; 10. stokehold water-coal-slurry tank; 11.1# screw pump; 12. hot-blast stoves; 13. dust arresters; 14. ventilation blowers; 15.2# pulse bag dust arrester installation; 16. Condensed transportation devices; 17. compressed air systems; 18.CO
2fire extinguishing system; 19. fine powder finished bin; 20. surge bunkers; 21. one-level graders; 22. secondary graders; 23.4# pulse bag dust arrester installation; 24. air-introduced machines; 25.3# pulse bag dust arrester installation; 26. meal collecting bins; 27. superfine powder collecting bins; 28. bags of collecting bins that gather dust.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, present device comprises pulverized coal preparation system and fine powder piece-rate system, in pulverized coal preparation system, comprise the coal conveyer belt 1 by storehouse ribbon conveyer conveying raw coal, coal conveyer belt 1 is connected to surge bunker 2, and surge bunker 2 connects vertical grinder 4 by weighing coal feeder 3, and vertical grinder 4 is communicated with Vertical Mill drier, form Liang Tao vertical mill mechanism by the said equipment, Liang Tao vertical mill mechanism can carry out meal to raw coal respectively and to grind and fine powder grinds.Vertical grinder 4 is connected to 1# pulse bag dust arrester installation 5,1# pulse bag dust arrester installation 5 connects king bolt batcher 7 by minor spiral batcher 6 and is connected to bucket elevator 8, bucket elevator 8 is connected to meal finished bin 9 and fine powder finished bin 19 respectively, and meal finished bin 9 and fine powder finished bin 19 are provided with 2# pulse bag dust arrester installation 15; Wherein, Vertical Mill drier comprises hot-blast stove 12, and hot-blast stove 12 is communicated with stokehold water-coal-slurry tank 10 for hot-blast stove 12 by 1# screw pump 11 provides the energy, and hot-blast stove 12 is communicated with vertical grinder 4 by dust arrester 13.1# pulse bag dust arrester installation 5 is connected with compressed air system 17 by ventilation blower 14 with 2# pulse bag dust arrester installation 15.CO is provided with in 1# pulse bag dust arrester installation 5 and 2# pulse bag dust arrester installation 15 and vertical grinder 4, meal finished bin 9 and fine powder finished bin 19
2fire extinguishing system 18.
Fine powder piece-rate system comprises the surge bunker 20 be connected with fine powder finished bin 19, and surge bunker 20 is communicated with one-level grader 21 and secondary grader 22 successively, and one-level grader 21 and secondary grader 22 are communicated with meal collecting bin 26 and superfine powder collecting bin 27 respectively; Secondary grader 22 is communicated with 4# pulse bag dust arrester installation 23,4# pulse bag dust arrester installation 23 and is communicated with marsupial respectively and gathers dust collecting bin 28 and air-introduced machine 24; Surge bunker 20 is provided with 3# pulse bag dust arrester installation 25; Meal finished bin 9 is communicated to blended size system by Condensed transportation device 16; Superfine powder collecting bin 27 is communicated to blended size system by conveyer belt.
Below by specific embodiment, the method that the present invention utilizes the said equipment to carry out pulping is further described.
A. the preparation of meal:
1) family's loess hills colliery 5-2 (material size < 50mm) foam coal will be opened and quantitatively add vertical grinder 4 by weighing coal feeder 3, feeding controls at 30T/h, simultaneously through hot-blast stove 12 hot blast out by entering in mill from vertical grinder 4 after dust arrester 13 dedusting, the coal dust of desired particle size distribution is prepared by adjustment separator rotating speed and ventilation blower air quantity (adjustment negative pressure), Vertical Mill outlet temperature controls at 71 DEG C to dry moisture by hot-blast stove by Vertical Mill inside, strengthens coal dust grindability; Feed coal grinds out at two cover vertical grinders 4 fine powder (the 200 order sieving rate >93% that meso-position radius is 20 μm respectively, less than 15 μm fine powder contents 40%), be the meal (200 order sieving rate 35%) of 80 μm with meso-position radius;
2) by adjustment Vertical Mill in negative pressure and separator rotating speed, by do not meet meso-position radius be 80 μm meal from cone bucket fall mill grinding again; Meso-position radius is that the meal of 80 μm trips out mill with air-flow one, collects, deliver to meal finished bin 9 by batcher through bucket elevator 8 through pulse bag collection device, for subsequent use;
3) through vertical grinder 4 grind out meso-position radius be 20 μm fine powder through pulse bag collection device collect, deliver in fine powder finished bin 19 by batcher through bucket elevator 8;
B. the separation and acquisition of fine powder:
1) by helical feed mode, the fine powder in fine powder finished bin 19 is delivered in the surge bunker 20 of fine powder piece-rate system;
2) meso-position radius is that the fine powder of 20 μm carries out superfine powder separation further by the one-level grader 21 in fine powder piece-rate system, wherein the meal carried secretly in fine powder is separated by one-level grader 21, be collected in meal collecting bin 26, and turn back to system meal finished bin 9 from meal collecting bin 26;
3) fine powder carries meso-position radius secretly is that the ultra-fine grain coal dust of 4-6 μm enters secondary grader 22 and carries out secondary grading, and the superfine powder that wherein secondary grader 22 is separated is collected in superfine powder collecting bin 27 respectively and is collected in bag through 4# pulse bag dust arrester installation 23 and gathers dust in collecting bin 28 and use for grating of sizing mixing;
C. the preparation of high-concentration coal-water slurry:
The superfine powder of the meal in meal finished bin 9 and superfine powder collecting bin 27 and bag being gathered dust in collecting bin 28 mixes according to the ratio that mass ratio is 2:1, be added to tank of sizing mixing after being mixed by agitator, in tank of sizing mixing, add the large sodium cellulose glycolate stabilizing agent in south that water-coal-slurry mass percent is the large slurries additive agent NDF and 0.1% in dispersant south of 0.6% simultaneously respectively; Stir slaking after 3 hours, through the sieved filter of pressure filtration, eventually pass shear pump and shear, deliver to finished pot; Finished product is delivered to tank before hot-blast stove stokehold tank or Boiler Furnace.
The size distribution of water-coal-slurry after concentrate:
The water-coal-slurry testing graininess adopting BT-2001 type laser fineness gage to modulate above-mentioned thickness ratio 2:1, tests the water-coal-slurry of non-grating simultaneously.Test result is shown in shown in Fig. 2, Fig. 3.
Fig. 2 is that (in figure, abscissa is particle size without the particle-size distribution of coal-water slurry of grating, left ordinate scale is cumulative amount, right ordinate scale is interval content), Fig. 3 is the particle-size distribution of coal-water slurry that above-mentioned thickness ratio 2:1 modulates, and presents " bimodal " distribution.Bimodal distribution can improve the filling rate of coal powder size, improves coal dust deposition efficiency.By the contrast of table 1 with Alfred model, can see that the water-coal-slurry granularity cumulative amount after grating is closer to Alfred model further, and non-grating sample and model gap are comparatively large, especially less than 30 μm and 10 μm fine powder contents.
The cumulative distribution contrast of table 1. sample under some particle diameters
60%, there is soft precipitation in 3 days in the maximum slurrying concentration of non-grating coal dust, within one week, occurs hard precipitation.After grating, the maximum slurrying concentration of coal dust is 63%, viscosity lower than 1200mPaS, stability > 30 days.
In sum, the present invention improves the paste-forming properties of low order shenfu coal by pulverized coal particle " grating ", slurrying concentration is improve at least 3 percentage points, and stability improves greatly.The raising of concentration can improve efficiency of combustion, saving cost of transportation, the raising gasification gas efficiency of boiler.This preparation method can realize suitability for industrialized production, can meet market application requirement.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention; can not assert that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention by submitted to claims determination scope of patent protection.
Claims (9)
1. one kind is improved the system of slurry property of low order coal slurry, it is characterized in that, comprise pulverized coal preparation system and fine powder piece-rate system, described pulverized coal preparation system comprises and is communicated with by storehouse ribbon conveyer coal conveyer belt (1) of the conveying raw coal be connected successively, surge bunker (2), weighing coal feeder (3) and vertical grinder (4) and vertical grinder (4) the Liang Tao vertical mill mechanism that Vertical Mill drier forms; Described vertical grinder (4) is connected to 1# pulse bag dust arrester installation (5), 1# pulse bag dust arrester installation (5) connects bucket elevator (8) by batcher, bucket elevator (8) is connected to meal finished bin (9) and fine powder finished bin (19) respectively, meal finished bin (9) and fine powder finished bin (19) is respectively arranged with 2# pulse bag and gathers dust (15) device;
Described fine powder piece-rate system comprises the surge bunker (20) be connected with fine powder finished bin (19), surge bunker (20) is communicated with one-level grader (21) and secondary grader (22) successively, and one-level grader (21) and secondary grader (22) are communicated with meal collecting bin (26) and superfine powder collecting bin (27) respectively; Secondary grader (22) is communicated with 4# pulse bag dust arrester installation (23);
Described meal finished bin (9) is communicated to blended size system by Condensed transportation device (16); Described superfine powder collecting bin (27) is communicated to blended size system by conveyer belt.
2. a kind of system improving slurry property of low order coal slurry according to claim 1, it is characterized in that, in described pulverized coal preparation system, Vertical Mill drier comprises hot-blast stove (12), hot-blast stove (12) is by 1# screw pump (11) connection stokehold water-coal-slurry tank (10) for hot-blast stove (12) provides the energy, and hot-blast stove (12) is communicated with vertical grinder (4) by dust arrester (13).
3. a kind of system improving slurry property of low order coal slurry according to claim 1, it is characterized in that, in described pulverized coal preparation system, 1# pulse bag dust arrester installation (5) is connected with compressed air system (17) by ventilation blower with 2# pulse bag dust arrester installation (15); In described fine powder piece-rate system, 4# pulse bag dust arrester installation (23) is communicated with marsupial respectively and gathers dust collecting bin (28) and air-introduced machine (24).
4. a kind of system improving slurry property of low order coal slurry according to claim 1, it is characterized in that, in described pulverized coal preparation system, in 1# pulse bag dust arrester installation (5) and 2# pulse bag dust arrester installation (15) and vertical grinder (4), meal finished bin (9) and fine powder finished bin (19), be provided with CO2 fire extinguishing system (18).
5. a kind of system improving slurry property of low order coal slurry according to claim 1, it is characterized in that, in described pulverized coal preparation system, batcher comprises minor spiral batcher (6) and king bolt batcher (7), minor spiral batcher (6) is positioned at 1# pulse bag dust arrester installation (5) below, king bolt batcher (7) is positioned at minor spiral batcher (6) below, and king bolt batcher (7) is connected with minor spiral batcher (6).
6. a kind of system improving slurry property of low order coal slurry according to claim 1, is characterized in that, in described fine powder piece-rate system, surge bunker (20) is provided with 3# pulse bag dust arrester installation (25).
7. improve a method for slurry property of low order coal slurry, it is characterized in that, the method comprises the steps:
A. the preparation of meal:
1) the foam coal of material size < 50mm is quantitatively added vertical grinder (4) by weighing coal feeder (3), simultaneously enter mill in by after dust arrester (13) dedusting from vertical grinder (4) through hot-blast stove (12) hot blast out, at two covers vertical grinder (4), to grind out meso-position radius be respectively the fine powder of 20 μm and meso-position radius to feed coal is the meal of 80 μm;
2) by adjustment Vertical Mill in negative pressure and separator rotating speed, by do not meet meso-position radius be 80 μm meal from cone bucket fall mill grinding again; Meso-position radius is that the meal of 80 μm trips out mill with air-flow one, collects, deliver to meal finished bin (9) by batcher through bucket elevator (8) through pulse bag collection device, for subsequent use;
3) through vertical grinder (4) grind out meso-position radius be 20 μm fine powder through pulse bag collection device collect, deliver in fine powder finished bin (19) by batcher through bucket elevator (8);
B. the separation and acquisition of fine powder:
1) by helical feed mode, the fine powder in fine powder finished bin (19) is delivered in the surge bunker (20) of fine powder piece-rate system;
2) meso-position radius is that the fine powder of 20 μm carries out superfine powder separation further by the one-level grader (21) in fine powder piece-rate system, wherein the meal carried secretly in fine powder is separated by one-level grader (21), be collected in meal collecting bin (26), and turn back to system meal finished bin (9) from meal collecting bin (26);
3) fine powder carries meso-position radius secretly is that the ultra-fine grain coal dust of 4-6 μm enters secondary grader (22) and carries out secondary grading, and the superfine powder that wherein secondary grader (22) is separated is collected in superfine powder collecting bin (27) respectively and is collected in bag through 4# pulse bag dust arrester installation (23) and gathers dust in collecting bin (28) and use for grating of sizing mixing;
C. the preparation of high-concentration coal-water slurry:
The superfine powder that meal in meal finished bin (9) and superfine powder collecting bin (27) and bag gather dust in collecting bin (28) is mixed according to the ratio that mass ratio is 2:1, be added to tank of sizing mixing after being mixed by agitator, in tank of sizing mixing, add quality of pc percentage respectively is the dispersant of 0.6% and the stabilizing agent of 0.1% simultaneously; Stir slaking after 3 hours, through the sieved filter of pressure filtration, eventually pass shear pump and shear, deliver to finished pot; Finished product is delivered to tank before hot-blast stove stokehold tank or Boiler Furnace.
8. the method for raising slurry property of low order coal slurry according to claim 7, is characterized in that, described dispersant is the large slurries additive agent NDF in south.
9. the method for raising slurry property of low order coal slurry according to claim 7, is characterized in that, described stabilizing agent is the large sodium cellulose glycolate stabilizing agent in south.
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| CN103537355B (en) * | 2013-10-11 | 2015-06-17 | 陕煤集团神木张家峁矿业有限公司 | System and method for preparing ultrafine pulverized coal |
| CN107057789B (en) * | 2017-06-14 | 2019-08-16 | 南京大学 | A kind of optimization level matches the preparation method of low energy consumption high-concentration coal-water slurry |
| CN108393187B (en) * | 2018-02-06 | 2020-06-05 | 湖南三创富泰环保材料股份有限公司 | Automatic temperature control method for water granulated slag vertical mill system |
| CN110643402A (en) * | 2019-10-08 | 2020-01-03 | 煤科院节能技术有限公司 | Method for preparing sludge coal water slurry through sludge viscosity reduction treatment |
| CN115350748B (en) * | 2022-08-18 | 2023-07-25 | 安徽理工大学 | Coal water slurry concentration device |
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