CN109679705A - A kind of composite fluxing agent improving coal ash melting property - Google Patents
A kind of composite fluxing agent improving coal ash melting property Download PDFInfo
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- CN109679705A CN109679705A CN201910046594.2A CN201910046594A CN109679705A CN 109679705 A CN109679705 A CN 109679705A CN 201910046594 A CN201910046594 A CN 201910046594A CN 109679705 A CN109679705 A CN 109679705A
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- fluxing agent
- coal ash
- coal
- composite fluxing
- melting property
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
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- Oil, Petroleum & Natural Gas (AREA)
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- Incineration Of Waste (AREA)
Abstract
The invention discloses a kind of improvement coal ash melting property composite fluxing agents, belong to the technical field for improving coal ash melting property, it is at high cost can to solve the existing method for improving coal ash melting property, while reducing ash fusion point, the problems such as can not being adjusted to coal ash viscosity-temperature characteristics, fluxing agent raw material include that lime stone, iron ore and silica sand etc. are easy to get the raw material of industry, and silica sand is mainly used for adjusting the silica alumina ratio of target coal, adding proportion determines that additive amount is account for raw coal quality 4%~6% according to target coal ash component.The present invention effectively improves the meltbility of coal ash, can not only guarantee the requirement of mixture homogeneity, but also can satisfy the needs of environmental protection and steady production.
Description
Technical field
The present invention relates to improvement coal ash melting property technical fields more particularly to a kind of improvement the compound of coal ash melting property to help
Flux.
Background technique
With domestic maturation and Rapid Popularization application including type of furnaces such as space flight furnace, Shanxi China furnaces, coal gasification research and development have been driven
Direction and market are gradually dominated by pressurized bulk air-flow bed coal-gasification gasification furnace, and slag tap gasification furnace promotes and applies, certain
The use of high-ash-fusion coal is limited in meaning.
Due to the gasification furnace of domestic operation at present be largely all made of be slag tap mode, ash fusion point and viscous
Temperature characteristics are most important for the tapping process of gasification furnace, and the temperature in furnace is excessively high then to be reduced along with the viscosity of coal ash, coal ash
It can not be attached to the furnace wall of gasification furnace, gasification furnace can not be effectively protected.Temperature in furnace is too low, then coal ash viscosity is too big, coal
Ash is easy to cohere on furnace wall even blocking slag-drip opening, influences the normal deslagging of gasification furnace and blowing out cleaning is seriously also needed to influence work
Skill process restricts the heavy-duty service of production.
To meet the high coal of ash fusion point, (1580 DEG C of grey flowing temperature > has been more than the measurement model of traditional ash fusion point tester
Enclose) slag tap, gasification furnace general operation temperature be higher than 50~100 DEG C of ash fusion point, can mainly generate following problems: 1, coal
Pyrolytic gasification is at 950 DEG C or more, and control is higher than 1400 DEG C, this temperature space needs to consume a large amount of energy to realize, reduces
Gasifier operation temperature is the effective way for reducing gasification system consumption；2, high-temperature region operational stability is worse, safety
It is lower；3, viscosity-temperature characteristics difference will cause coal ash in flowable state temperature range it is narrow, for technological operation control range it is small, gas
Change furnace operation difficulty is big, and stability is poor, and gasification furnace blowing out accident caused by easily causing slagging or clinker wall built-up bad occurs.
Following methods are generallyd use in industry reduces raw material coal ash fusion temperature: 1. adding lime stone；2. it is molten to be incorporated coal ash
The preferable coal of melting property is carried out with coal gasification；3. adding sodium salt；4. adding magnesium salts or borax etc..But it deposits in production practice
Dross instability problem is caused in more problem, such as coal blending；Corrosion problems caused by sodium salt is dissolved in ash water system；Magnesium salts
Effect unobvious cause the higher problem of ash.Addition calcium system fluxing agent will appear into ash fusion point " pole " phenomenon etc..
Therefore it provides a kind of fluxing agent that is easy to operate, being not easy slagging, can adjust the soda acid of coal ash than reducing coal ash
Fusing point is this field technical issues that need to address.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of composite fluxing agents for improving coal ash melting property.
According to an aspect of the present invention, a kind of composite fluxing agent for improving coal ash melting property is provided, including with the following group
Point:
Wherein, the ratio of element silicon and aluminium element is 1:1~3:1 in composite fluxing agent.
Selectively, including following components:
Selectively, including following components:
Selectively, composite fluxing agent is graininess, wherein partial size is partially larger than the 85% of 3-10mm, and partial size is less than
The part of 3mm is less than 10%.
Selectively, the water content of composite fluxing agent is less than 5%.
According to another aspect of the present invention, a kind of application method of composite fluxing agent improving coal ash melting property is provided,
The composite fluxing agent of addition 4%~6% into raw coal, wherein CaCO3Additive amount be raw coal quality 3%~3.5%,
Fe2O3Or Fe3O4Additive amount be raw coal quality 2.5%~3%.
It selectively, is 60%- doped with acidic oxide constituent content in the coal ash of the coal combustion of composite fluxing agent
80%, basic anhydride constituent content is 20%-30%, and soda acid ratio is 2-5.5:1.
It selectively, is 65%- doped with acidic oxide constituent content in the coal ash of the coal combustion of composite fluxing agent
75%, basic anhydride constituent content is 22%-25%, and soda acid ratio is 3-5:1.
Wherein, the important indicator that ash fusion point and viscosity-temperature characteristics gasify as coal ash, when ash fusion point is that coal ash reaches melting
Temperature, general point softens, melts, flowing several temperature spots, wherein flowing temperature is lower better to coal ash gasification result.Only coal
Fusion point of ash is low, and viscosity when coal ash reaches fusing point is also low, is easy flowing, coal ash is just easy to gasify, and is easy to the fire grate that gasifies
Slag.When viscosity-temperature characteristics refer to that pit ash melts at different temperatures, mobility that liquid ash is showed.
The composite fluxing agent of improvement coal ash melting property of the invention includes 15%~35%Fe2O3Or Fe3O4, 5%~
55%CaCO3, 8%~18%SiO2,≤4%Al2O3。
Preferably, the composite fluxing agent for improving coal ash melting property includes 15%~25%Fe2O3Or Fe3O4, 45%~
55%CaCO3, 8%~15%SiO2,≤2%Al2O3。
Wherein, CaCO3As one of the important component of composite fluxing agent of the invention, there are " a poles for calcium system fluxing agent
Point ", when fluxing agent is added to certain proportion, ash fusion point, which no longer reduces, to be occurred rising situation instead.Of the invention is compound fluxing
CaCO in agent3Content be 35%~55%.Preferably, CaCO in composite fluxing agent of the invention3Content be 45%~
55%
SiO2As one of the important component of composite fluxing agent of the invention, silicon ingredient is convention acidic ingredient, but is being worked as
When silicone content is in 45%~60% range in target components of coal ash, ash fusion point can be effectively reduced in silicon, and it is viscous to be obviously improved coal ash
Temperature characteristics；According to different material components of coal ash silicone content situation, SiO in composite fluxing agent of the invention2Content be 8%~
18%, it is preferable that SiO in composite fluxing agent of the invention2Content be 8%~15%.
Fe2O3Or Fe3O4It is one of the important component of composite fluxing agent of the invention as iron series fluxing agent, iron series are fluxing
Agent materials are convenient, are positively correlated with ash fusion point reduction, but adulterate iron series fluxing agent into coal ash and iron simple substance precipitation shadow easily occur
Rehearse with musical accompaniment slag and wall built-up the case where.Therefore, comprehensively consider ash fusion point reduction and wall built-up situation, the composite fluxing agent in the present invention
Middle Fe2O3Or Fe3O4Content be 15%~35%, Fe in composite fluxing agent of the invention2O3Or Fe3O4Content be 15%~
25%.
Al2O3Negative element is adjusted as ash fusion point is influenced, it should its content is controlled, according to Primary Stage Data, Al2O3Content
Every increase and decrease 1%, can offset about 2~3%Fe2O3Effect.Rule of thumb estimate, the present invention claims Al2O3≤ 4%.
The slag viscosity-temperature characteristic of raw coal combustion depends primarily on the viscosity of liquid slag, and liquid slag viscosity again relies on slag
Composition, especially SiO/Al2O3, CaO and FeO content, practical gasification need to add fluxing agent in using to improve coal ash
Melting characteristic and viscosity-temperature characteristic are to meet industrial liquid deslagging gasifier operation requirement.The present invention passes through addition silica tune
Whole silica alumina ratio adds iron and calcium, improves alkaline components content, finally makes the ash component of feed coal close to low ash smelting point
The ash component ratio of coal realizes the purpose for reducing ash fusion point.The silica alumina ratio of composite fluxing agent of the invention is 1:1~3:1.
Composite fluxing agent of the invention, the composite fluxing agent of 4%-6% is added when use into raw coal, and the present invention passes through
The current domestic highest preceding ten kinds of raw coal of usage amount are tested, are added into the raw coal of different component content of the invention
Composite fluxing agent, when additive amount is 4%-6%, the resultant effect for reducing the coal ash fusion temperature of different raw coal is best, and universality is more
It is high.
As a preferable example of the invention, the composite fluxing agent for improving coal ash melting property includes following components:
Beneficial effects of the present invention are as follows:
1, the composite fluxing agent reduction coal ash fusion temperature effect of improvement coal ash melting property of the invention is obvious, more fluxing than conventional
Agent reduces about 100 DEG C of ash fusion point or more.
2, the composite fluxing agent of improvement coal ash melting property of the invention effectively improves conventional calcium system fluxing agent with addition
Amount, which increases " pole " phenomenon that ash fusion point goes up not down, to be occurred.
3, composite fluxing agent of the invention is optimized by selecting reasonable silica alumina ratio to effectively improve coal ash viscosity-temperature characteristics
Gasification furnace technological operation space, improves the wall built-up situation of coal combustion, prevents coal ash slagging from needing the influences such as blowing out cleaning raw
The situation for producing the period occurs.
4, composite fluxing agent of the invention has fully considered the problem of stablizing metering in coal-fired process, and of the invention is compound
Fluxing agent epigranular has good mobility, it is ensured that continuous-stable that low dose quantitatively controls, accurate reliable.
5, the composite fluxing agent invented is added in raw coal, so that the ash component of feed coal is close to low ash smelting point
The ash component ratio of coal reduces ash fusion point, improves the viscosity-temperature characteristic of coal ash, to improve the stability of gasification furnace operating.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, implement below in conjunction with the present invention
Example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.It needs to illustrate
, in the absence of conflict, the features in the embodiments and the embodiments of the present application vector can mutual any combination.
A kind of composite fluxing agent improving coal ash melting property, including following components: Fe2O3Or Fe3O415%~35%,
CaCO335%~55%, SiO28%~18%, Al2O3≤ 4%.Wherein, in composite fluxing agent element silicon and aluminium element ratio
Example be 1:1~3:1, with this condition so that the ash component of feed coal close to low ash smelting point coal ash component ratio,
It realizes the purpose for reducing ash fusion point, avoids the viscosity-temperature characteristics due to coal ash poor, temperature drops during slag flows downward from cinder notch
Low, viscosity increases, and leads to dross, is difficult to flow, dross leads to gas bias current, makes downcomer slagging or burn-through, after each blowing out
The problem of all having to overhaul down-comer.
Composite fluxing agent is graininess, wherein partial size is partially larger than the 85% of 3-10mm, and partial size is less than the part of 3mm
Less than 10%.The water content of composite fluxing agent is less than 5%.
The application method for improving the composite fluxing agent of coal ash melting property, into raw coal, addition 4%~6% is compound fluxing
Agent, wherein CaCO3Additive amount be raw coal quality 3%~3.5%, Fe2O3Or Fe3O4Additive amount be raw coal quality
2.5%~3%.
It is 60%-80%, alkaline oxygen doped with acidic oxide constituent content in the coal ash of the coal combustion of composite fluxing agent
Compound constituent content is 20%-30%, and soda acid ratio is 2-5.5:1.
It is 65%-75%, alkaline oxygen doped with acidic oxide constituent content in the coal ash of the coal combustion of composite fluxing agent
Compound constituent content is 22%-25%, and soda acid ratio is 3-5:1.
The specific embodiment of the composite fluxing agent of coal ash melting property is listed below, in an embodiment of the present invention, with lime
Stone, iron ore and silica sand are raw material.
Embodiment
Table 1, which shows the present invention, improves the part implementation of each component concrete content in the composite fluxing agent of coal ash melting property
Example.It should be pointed out that the composite fluxing agent each component concrete content of coal ash melting property of the invention is not limited in table 1
Data.
1 composite fluxing agent constituent content embodiment of table
Contrast test example
The performance of the composite fluxing agent of the improvement coal ash melting property of embodiment 1-8 is tested.Simultaneously for existing
The performance data of coal combustion in technology using common calcium system fluxing agent is compared, specific as shown in table 2.
Table 2 improves the ash fusion point result of performance test and the comparison of the composite fluxing agent of coal ash melting property
As can be seen from Table 2, the coal ash fusion temperature for being added to fluxing agent of the invention adds common calcium system than in the prior art
Fluxing agent is substantially reduced.Calcium system fluxing agent is used merely, and feed coal flowing temperature mean value is 1387 DEG C, is helped using of the invention
Flux, feed coal flowing temperature mean value can be effectively controlled 1308 DEG C, using in flux process of the invention there is no
It crosses because of technique blowing out accident.
As can be seen from Table 2, SiO in fluxing agent of the invention2Optimum range is 9.60%~17.72%； Fe2O3Most preferably
Range is 16.91%~20.77%；CaCO3Optimum range is 38.00%~51.25%.Consider the limitation of all coals,
The optimal components of fluxing agent match are as follows: SiO2Optimum range is 8.00%~18.00%；Fe2O3Optimum range be 15.00%~
25.00%；CaCO3Optimum range is 35.00%~55.00%.
To sum up, it is according to the present invention improve coal ash melting property composite fluxing agent, by adjusting comprising component and
Proportion, selects suitable silica alumina ratio, reduces the soda acid ratio of the coal ash of coal combustion, so that the viscosity-temperature characteristics of coal ash are effectively improved,
Gasification furnace stable operation number of days extends.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that article or equipment including a series of elements not only include those elements, but also including
Other elements that are not explicitly listed, or further include for this article or the intrinsic element of equipment.Not more
In the case where limitation, the element that is limited by sentence " including ... ", it is not excluded that in article or equipment including the element
In there is also other identical elements.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, reference only to preferred embodiment to this
Invention is described in detail.Those skilled in the art should understand that can be repaired to technical solution of the present invention
Change or equivalent replacement should all cover in claim of the invention without departing from the spirit and scope of the technical solution of the present invention
In range.
Claims (8)
1. a kind of composite fluxing agent for improving coal ash melting property, which is characterized in that including following components:
Wherein, the ratio of element silicon and aluminium element is 1:1~3:1 in composite fluxing agent.
2. improving the composite fluxing agent of coal ash melting property as described in claim 1, which is characterized in that including following components:
3. improving the composite fluxing agent of coal ash melting property as described in claim 1, which is characterized in that including following components:
4. improving the composite fluxing agent of coal ash melting property as described in claim 1, which is characterized in that the composite fluxing agent is
Graininess, wherein partial size is partially larger than the 85% of 3-10mm, and part of the partial size less than 3mm is less than 10%.
5. improving the composite fluxing agent of coal ash melting property as claimed in claim 4, which is characterized in that the composite fluxing agent
Water content is less than 5%.
6. a kind of application method of the composite fluxing agent as described in claim 1 for improving coal ash melting property, which is characterized in that
The composite fluxing agent of addition 4%~6% in raw coal, wherein CaCO3Additive amount be raw coal quality 3%~3.5%,
Fe2O3Or Fe3O4Additive amount be raw coal quality 2.5%~3%.
7. improving the application method of the composite fluxing agent of coal ash melting property as claimed in claim 6, which is characterized in that doped with
Acidic oxide constituent content is 60%-80% in the coal ash of the coal combustion of the composite fluxing agent, and basic anhydride component contains
Amount is 20%-30%, and soda acid ratio is 2-5.5:1.
8. improving the application method of the composite fluxing agent of coal ash melting property as claimed in claim 7, which is characterized in that doped with
Acidic oxide constituent content is 65%-75% in the coal ash of the coal combustion of the composite fluxing agent, and basic anhydride component contains
Amount is 22%-25%, and soda acid ratio is 3-5:1.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396448A (en) * | 2019-07-12 | 2019-11-01 | 赵夕文 | It is a kind of modified coal-fired |
| CN111748396A (en) * | 2020-06-05 | 2020-10-09 | 中节能（连云港）清洁技术发展有限公司 | Coke inhibitor and preparation method and application thereof |
| CN113416806A (en) * | 2021-05-25 | 2021-09-21 | 鞍钢股份有限公司 | Fusing agent for improving melting property of coal ash for blast furnace blowing and using method thereof |
| CN115261098A (en) * | 2022-09-06 | 2022-11-01 | 山西潞安煤基清洁能源有限责任公司 | Coal ash composite fluxing agent and method for improving coal ash meltability |
| CN115261097A (en) * | 2022-09-06 | 2022-11-01 | 山西潞安煤基清洁能源有限责任公司 | Preparation method of raw material coal fluxing agent of liquid slag-discharging gasification furnace |
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| CN103060054A (en) * | 2013-01-28 | 2013-04-24 | 中国矿业大学 | Method for adjusting and controlling melting temperature of coal ash by combining coal blending with auxiliary agent |
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| CN106675657A (en) * | 2016-12-07 | 2017-05-17 | 西北大学 | Method for regulating and controlling flowing temperature of high-melting-point coal ash |
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| CN103060054A (en) * | 2013-01-28 | 2013-04-24 | 中国矿业大学 | Method for adjusting and controlling melting temperature of coal ash by combining coal blending with auxiliary agent |
| CN104479794A (en) * | 2014-10-24 | 2015-04-01 | 东方电气集团东方锅炉股份有限公司 | Flux for reducing fine coal gasification ash melting point temperature and use method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396448A (en) * | 2019-07-12 | 2019-11-01 | 赵夕文 | It is a kind of modified coal-fired |
| CN111748396A (en) * | 2020-06-05 | 2020-10-09 | 中节能（连云港）清洁技术发展有限公司 | Coke inhibitor and preparation method and application thereof |
| CN113416806A (en) * | 2021-05-25 | 2021-09-21 | 鞍钢股份有限公司 | Fusing agent for improving melting property of coal ash for blast furnace blowing and using method thereof |
| CN115261098A (en) * | 2022-09-06 | 2022-11-01 | 山西潞安煤基清洁能源有限责任公司 | Coal ash composite fluxing agent and method for improving coal ash meltability |
| CN115261097A (en) * | 2022-09-06 | 2022-11-01 | 山西潞安煤基清洁能源有限责任公司 | Preparation method of raw material coal fluxing agent of liquid slag-discharging gasification furnace |
| CN115261097B (en) * | 2022-09-06 | 2024-01-19 | 山西潞安煤基清洁能源有限责任公司 | Preparation method of raw material coal fluxing agent of liquid slag-discharging gasifier |
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Effective date of registration: 20220314 Address after: 048021 south side of courtyard 1, Zhengbei street, liushudi village, Xiacun Town, Zezhou County, Jincheng City, Shanxi Province Patentee after: Shanxi Qiwang mineral products Co.,Ltd. Address before: 067512 group 1, copper mine community, nan50jiazi Town, Pingquan City, Chengde City, Hebei Province Patentee before: PINGQUAN TENGJU NONMETAL MINERAL PRODUCTS MANUFACTURING Co.,Ltd. |