CN109523177A - The method for improving coal powder formation rate and shaping strength - Google Patents
The method for improving coal powder formation rate and shaping strength Download PDFInfo
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- CN109523177A CN109523177A CN201811394103.5A CN201811394103A CN109523177A CN 109523177 A CN109523177 A CN 109523177A CN 201811394103 A CN201811394103 A CN 201811394103A CN 109523177 A CN109523177 A CN 109523177A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
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- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06395—Quality analysis or management
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Mining
Abstract
The invention discloses a kind of methods for improving coal powder formation rate and shaping strength, and hard coal is added in fine coal, makes its moulded coal index Q between 380~420.Since hard coal is non-breakable in digging, transportational process, the coal amount of relatively fine particle is few, its size distribution can be controlled by the operation of crusher, and the caking property of dry fine coal can be improved in hard coal contained humidity, the fineness ratio fine coal of hard coal is big, it can play the role of forming nucleus, therefore the method for the present invention does not use binder, and the molding ratio of briquetting of dry fine coal and intensity are improved as additive using hard coal used in coking industry, utilize the intrinsic raw material of coking industry, need not outer adding additives, reduce moulded coal cost and operating cost.
Description
Technical field
The invention belongs to coking coal preconditioning technique fields, and in particular to a kind of coal powder formation rate and shaping strength of improving
Method.
Background technique
Coking wastewater is the organic wastewater of a kind of high concentration, high pollution, and toxicity is big, and biodegradable is poor, is steel
The most intractable a kind of waste water of industry.Increasingly strict with national environmental standard, coking industry controls waste water row from source
It puts and is increasingly urgent to.Coking wastewater is mainly to be brought by coking coal, and it is left to enter furnace coking moisture content of coal 12% for country's coking industry at present
The right side, ton coke wastewater flow rate is big, and environmental protection pressure becomes the bottleneck for restricting coking industry development.
With the development of iron industry, blast furnace Coke Quality requires higher and higher, high-quality caking coal adapted ratio residence height
Under not.Due to exploiting utilization throughout the year, low-sulfur high-quality caking coal resource is very limited, and coking industry must utilize to greatest extent
Limited coking coal resource.In order to increase the adapted ratio of weakly caking coking coal, coal is developed and introduced successively to coking industry
The coking coals preconditioning techniques such as drying, coal damping.When coking moisture content of coal it is near 2% or less when, coking coal transport, in loading furnace process
Easily cause dust pollution, this is the main problem for restricting the development of coking coal coal dry technology.The solution of the problem is refining
Coke quality not only can be improved into coking coal in the coal powder formation post blend for being easy to escape in coking coal, but also has saved resource.
The generally outer adding additives pressure ball molding of domestic coking of shaping coal technology, the type of binder have organic binder and inorganic
Binder.The adhesive property of organic binder is preferable, makes moulded coal mechanical strength with higher, but heat-state mechanical strength and heat are steady
It is qualitative poor.Inorganic binder source is wide, at low cost, compares high temperature resistant, and manufactured moulded coal has preferable hot strength and heat
Stability, the disadvantage is that increasing moulded coal ash content, calorific value is reduced, and waterproofness is poor.Outer adding additives improve the material of moulded coal
Cost, outer adding additives could uniformly mix after must being atomized with fine coal for dry fine coal, it is necessary to increase operation equipment,
Also improve operating cost.
Also Some Enterprises carry out coal powder formation by external adding water, moisture mainly plays the work of wetting during coal powder formation
With, suitable moisture can soak coal particle surface, frictional resistance is formed because of mutual extrusion in forming process to reduce coal grain,
To be conducive to combine closely between coal grain.The moisture general control of cold-pressed briquette is 8~13%.The dry molding purpose of fine coal
It is the moisture reduced in process of coking, reduces coking wastewater amount, moisture therein will not be improved to 10% or so, therefore even if mix
Mixed binder may also will not play the optimum efficiency of binder to improve the intensity and yield of moulded coal.
And binder free coal powder formation is primarily present the problems such as ratio of briquetting is not high, moulded coal cold strength index is not high.Especially
Drying coal powder formation in aforementioned coking coal pretreating process, because xeraphium moisture content of coal is low, granularity is small, so ratio of briquetting is not high
And intensity index it is not high the problems such as it is more prominent.
Summary of the invention
The purpose of the present invention is to above-mentioned technical problems, and providing one kind without using binder just can improve coal powder formation
The method of rate and shaping strength.
To achieve the above object, the method for the raising coal powder formation rate and shaping strength designed by the present invention is as follows:
Hard coal and fine coal are weighed, and the granularity of hard coal is not more than 5mm, the granularity of fine coal is not more than 0.5mm and moisture
No more than 4wt%；
The weighed hard coal of institute is sieved by granularity, granularity is that the hard coal of 0~0.3mm accounts for X1Wt%, granularity are
The hard coal of 0.3~0.5mm accounts for X2Wt%, the hard coal that granularity is 0.5~1.0mm account for X3Wt%, granularity are 1.0~3.0mm's
Hard coal accounts for X4Wt%, the hard coal that granularity is 3.0~5.0mm account for X5Wt%, and granularity is the hard moisture in coal of 0~0.3mm
Account for A1Wt%, the hard moisture in coal that granularity is 0.3~0.5mm account for A2Wt%, the hard moisture in coal that granularity is 0.5~1.0mm
Account for A3Wt%, the hard moisture in coal that granularity is 1.0~3.0mm account for A4Wt%, the hard moisture in coal that granularity is 3.0~5.0mm
Account for A5Wt%；
The weighed fine coal of institute is sieved by granularity, granularity is that the fine coal of 0~0.1mm accounts for Y1Wt%, granularity be 0.1~
The fine coal of 0.2mm accounts for Y2Wt%, the fine coal that granularity is 0.2~0.3mm account for Y3Wt%, the fine coal that granularity is 0.3~0.4mm account for
Y4Wt%, the fine coal that granularity is 0.4~0.5mm account for Y5Wt%, and the powder moisture in coal that granularity is 0~0.1mm accounts for B1Wt%, grain
Degree is that the powder moisture in coal of 0.1~0.2mm accounts for B2Wt%, the powder moisture in coal that granularity is 0.2~0.3mm account for B3Wt%, granularity are
The powder moisture in coal of 0.3~0.4mm accounts for B4Wt%, the powder moisture in coal that granularity is 0.4~0.5mm account for B5Wt%；
Moulded coal index Q is calculated according to formula 1
Q=Σ (Xi×Ai+Yi×Bi) (1)
Xi: weight percent of the different grain size hard coal in material；
Ai: the moisture weight percentage in different grain size hard coal；
Yi: weight percent of the different grain size fine coal in material；
Bi: the moisture weight percentage in different grain size fine coal；
And i is the natural number no more than 5；
As 380 < Q < 420, the intensity and yield of moulded coal are best.
Further, the hard coal and the weighed weight percent of the fine coal are 5~15:85~95.
Compared with prior art, beneficial effects of the present invention are as follows: since hard coal is not fragile in digging, transportational process
Broken, the coal amount of relatively fine particle is few, its size distribution can be controlled by the operation of crusher, and hard coal contained humidity can
The caking property of dry fine coal is improved, the fineness ratio fine coal of hard coal is big, can play the role of forming nucleus, therefore the method for the present invention
Without using binder, and the molding ratio of briquetting of dry fine coal is improved as additive using hard coal used in coking industry
And intensity, utilize the intrinsic raw material of coking industry, it is not necessary to which outer adding additives reduce moulded coal cost and operating cost.
Specific embodiment
The present invention is described in further detail with comparative example combined with specific embodiments below, convenient for more clearly understanding
The present invention, but they limiting the invention.
A kind of method improving coal powder formation rate and shaping strength is as follows:
5~15:85~95 weigh hard coal and fine coal by weight percentage, and the granularity of hard coal is not more than 5mm, fine coal
Granularity is no more than 0.5mm and moisture is not more than 4wt%；
The weighed hard coal of institute is sieved by granularity, granularity is that the hard coal of 0~0.3mm accounts for X1Wt%, granularity are
The hard coal of 0.3~0.5mm accounts for X2Wt%, the hard coal that granularity is 0.5~1.0mm account for X3Wt%, granularity are 1.0~3.0mm's
Hard coal accounts for X4Wt%, the hard coal that granularity is 3.0~5.0mm account for X5Wt%, and granularity is the hard moisture in coal of 0~0.3mm
Account for A1Wt%, the hard moisture in coal that granularity is 0.3~0.5mm account for A2Wt%, the hard moisture in coal that granularity is 0.5~1.0mm
Account for A3Wt%, the hard moisture in coal that granularity is 1.0~3.0mm account for A4Wt%, the hard moisture in coal that granularity is 3.0~5.0mm
Account for A5Wt%；
Similarly, the weighed fine coal of institute is sieved by granularity, granularity is that the fine coal of 0~0.1mm accounts for Y1Wt%, granularity are
The fine coal of 0.1~0.2mm accounts for Y2Wt%, the fine coal that granularity is 0.2~0.3mm account for Y3Wt%, the fine coal that granularity is 0.3~0.4mm
Account for Y4Wt%, the fine coal that granularity is 0.4~0.5mm account for Y5Wt%, and the powder moisture in coal that granularity is 0~0.1mm accounts for B1Wt%,
Granularity is that the powder moisture in coal of 0.1~0.2mm accounts for B2Wt%, the powder moisture in coal that granularity is 0.2~0.3mm account for B3Wt%, granularity
B is accounted for for the powder moisture in coal of 0.3~0.4mm4Wt%, the powder moisture in coal that granularity is 0.4~0.5mm account for B5Wt%；
The pulverized coal particle size that fluidized bed is separated has fluctuation, moisture also to have fluctuation, and aqueous in varigrained fine coal
Amount is also different；Similarly, the hard coal property of blending also has fluctuation, contains including the moisture in size distribution and different grain size hard coal
Amount.Therefore it needs that operating parameter can be adjusted in time when material properties fluctuation, to guarantee the suitable strength and yield of moulded coal.
When experimental data shows that smaller grade granule content increases in fine coal, moisture is lower, if being incorporated hard coal at this time
Granularity it is excessive or moisture is too low, then be unfavorable for little particle coal powder formation, be unfavorable for the intensity and yield of moulded coal；Otherwise work as powder
If the particle accounting that particle is bigger in coal improves, the granularity of supplying hard coal should be properly increased, and moisture should be reduced suitably.?
The granularity and moisture regulation of hard coal will be appropriate in both of these case, are otherwise also unfavorable for the intensity and yield of moulded coal.
Aiming at the problem that there is briquette strength and output fluctuation when the fluctuation of material properties, according to a large amount of experimental data with
And theoretical calculation obtains following formula as the foundation of operating parameter is adjusted:
Q=Σ (Xi×Ai+Yi×Bi)
Q: moulded coal index；
Xi: weight percent of the different grain size hard coal in material；
Ai: the moisture weight percentage in different grain size hard coal；
Yi: weight percent of the different grain size fine coal in material；
Bi: the moisture weight percentage in different grain size fine coal；
And i is the natural number no more than 5；
As 380 < Q < 420, the intensity and yield of moulded coal are best.
The method of the present invention is further elaborated combined with specific embodiments below.
Broken hard coal enters the hopper on ball press top through surge bunker, gas coal moisture control in 10wt% or so,
Granularity is in 5mm hereinafter, analyzing its size distribution and moisture content is shown in Table 1；
1 hard coal property of table
Enter the hopper on ball press top after surge bunker by the fine coal of fluidized bed blowout, pulverized coal particle size is controlled in 0.5mm
Hereinafter, moisture is in 4wt% hereinafter, analyzing its size distribution and moisture content is shown in Table 2；
2 fine coal property of table
Dry fine coal is uniformly mixed in ball press hopper with hard coal, and preload screw is pacified in the hopper that the present embodiment uses
Equipped with stirring rod, stirring rod is not added such as to need in advance be uniformly mixed bottle coal in mixing channel with dry fine coal；Successively starting high pressure
To roll-in ball machine to roller motor and preload screw motor, pressure ball is carried out；It measures the pressure ball time, unit of account time yield, survey
Try coal briquette intensity.It is 407 by the Σ value that the data in Tables 1 and 2 are calculated, in best molding range.Relative to not plus
Individually to dry coal powder formation when hard coal, yield increases, and intensity improves, and illustrates that bottle coal, which is added, can play raising moulded coal yield
Effect with quality is shown in Table 3.
The comparison of 3 moulded coal yield and quality of table
Claims (2)
1. a kind of method for improving coal powder formation rate and shaping strength, it is characterised in that: the method is as follows:
Hard coal and fine coal are weighed, and the granularity of hard coal is not more than 5mm, the granularity of fine coal is not more than 0.5mm and moisture is little
In 4wt%；
The weighed hard coal of institute is sieved by granularity, granularity is that the hard coal of 0~0.3mm accounts for X1Wt%, granularity be 0.3~
The hard coal of 0.5mm accounts for X2Wt%, the hard coal that granularity is 0.5~1.0mm account for X3Wt%, the hard that granularity is 1.0~3.0mm
Coal accounts for X4Wt%, the hard coal that granularity is 3.0~5.0mm account for X5Wt%, and the hard moisture in coal that granularity is 0~0.3mm accounts for
A1Wt%, the hard moisture in coal that granularity is 0.3~0.5mm account for A2Wt%, the hard moisture in coal that granularity is 0.5~1.0mm account for
A3Wt%, the hard moisture in coal that granularity is 1.0~3.0mm account for A4Wt%, the hard moisture in coal that granularity is 3.0~5.0mm account for
A5Wt%；
The weighed fine coal of institute is sieved by granularity, granularity is that the fine coal of 0~0.1mm accounts for Y1Wt%, granularity are 0.1~0.2mm
Fine coal account for Y2Wt%, the fine coal that granularity is 0.2~0.3mm account for Y3Wt%, the fine coal that granularity is 0.3~0.4mm account for Y4Wt%,
Granularity is that the fine coal of 0.4~0.5mm accounts for Y5Wt%, and the powder moisture in coal that granularity is 0~0.1mm accounts for B1Wt%, granularity 0.1
The powder moisture in coal of~0.2mm accounts for B2Wt%, the powder moisture in coal that granularity is 0.2~0.3mm account for B3Wt%, granularity be 0.3~
The powder moisture in coal of 0.4mm accounts for B4Wt%, the powder moisture in coal that granularity is 0.4~0.5mm account for B5Wt%；
Moulded coal index Q is calculated according to formula 1
Q=Σ (Xi×Ai+Yi×Bi) (1)
Xi: weight percent of the different grain size hard coal in material；
Ai: the moisture weight percentage in different grain size hard coal；
Yi: weight percent of the different grain size fine coal in material；
Bi: the moisture weight percentage in different grain size fine coal；
And i is the natural number no more than 5；
As 380 < Q < 420, the intensity and yield of moulded coal are best.
2. according to claim 1 improve coal powder formation rate and shaping strength method, it is characterised in that: the hard coal and
The weighed weight percent of fine coal is 5~15:85~95.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1512475B1 (en) * | 2002-06-13 | 2009-09-23 | The Foundation for the Promotion of Industrial Science | Method for producing metal powder and formed product of raw material for metal |
| CN101722669A (en) * | 2008-10-27 | 2010-06-09 | 神华集团有限责任公司 | Pulverized coal molding method without binding agent and double-roller molding machine suitable for method |
| US20110107874A1 (en) * | 2008-07-11 | 2011-05-12 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Method for producing briquette, method for producing reduced metal, and method for separating zinc or lead |
| CN103695067A (en) * | 2013-12-20 | 2014-04-02 | 云南省化工研究院 | Non-bonder forming method for lignite |
| US20180015515A1 (en) * | 2015-02-12 | 2018-01-18 | Neway Msw Ip Holding Llp | A novel method and an apparatus in converting unsorted municipal solid waste into geo-polymer pellets/briquettes and geo-polymer bricks/paver blocks |
| CN105779059B (en) * | 2016-03-31 | 2018-10-12 | 神华集团有限责任公司 | A kind of fine coal high intensity forming method of binder free |
-
2018
- 2018-11-21 CN CN201811394103.5A patent/CN109523177A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1512475B1 (en) * | 2002-06-13 | 2009-09-23 | The Foundation for the Promotion of Industrial Science | Method for producing metal powder and formed product of raw material for metal |
| US20110107874A1 (en) * | 2008-07-11 | 2011-05-12 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Method for producing briquette, method for producing reduced metal, and method for separating zinc or lead |
| CN101722669A (en) * | 2008-10-27 | 2010-06-09 | 神华集团有限责任公司 | Pulverized coal molding method without binding agent and double-roller molding machine suitable for method |
| CN103695067A (en) * | 2013-12-20 | 2014-04-02 | 云南省化工研究院 | Non-bonder forming method for lignite |
| US20180015515A1 (en) * | 2015-02-12 | 2018-01-18 | Neway Msw Ip Holding Llp | A novel method and an apparatus in converting unsorted municipal solid waste into geo-polymer pellets/briquettes and geo-polymer bricks/paver blocks |
| CN105779059B (en) * | 2016-03-31 | 2018-10-12 | 神华集团有限责任公司 | A kind of fine coal high intensity forming method of binder free |
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