CN115261098A - Coal ash composite fluxing agent and method for improving coal ash meltability - Google Patents
Coal ash composite fluxing agent and method for improving coal ash meltability Download PDFInfo
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- CN115261098A CN115261098A CN202211086260.6A CN202211086260A CN115261098A CN 115261098 A CN115261098 A CN 115261098A CN 202211086260 A CN202211086260 A CN 202211086260A CN 115261098 A CN115261098 A CN 115261098A
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- fluxing agent
- coal ash
- coal
- composite fluxing
- ash
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 61
- 239000010883 coal ash Substances 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003245 coal Substances 0.000 claims abstract description 32
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 12
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 230000004907 flux Effects 0.000 claims description 9
- 230000002378 acidificating effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002956 ash Substances 0.000 abstract description 19
- 238000002844 melting Methods 0.000 abstract description 18
- 230000008018 melting Effects 0.000 abstract description 18
- 229910052708 sodium Inorganic materials 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 33
- 239000002893 slag Substances 0.000 description 23
- 229910052742 iron Inorganic materials 0.000 description 11
- 239000011575 calcium Substances 0.000 description 10
- 229910052791 calcium Inorganic materials 0.000 description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 description 10
- 239000011707 mineral Substances 0.000 description 10
- 238000002309 gasification Methods 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 159000000003 magnesium salts Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 230000003185 calcium uptake Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010797 grey water Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0983—Additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0983—Additives
- C10J2300/0996—Calcium-containing inorganic materials, e.g. lime
Abstract
The invention discloses a coal ash composite fluxing agent and a method for improving coal ash meltability; belongs to the technical field of coal ash fluxing agent; the coal ash composite fluxing agent comprises the following components in percentage by weight: fe 2 O 3 Or Fe 3 O 4 15% -35% of CaCO 3 35 to 55 percent of SiO 2 4 to 9 percent of Na 2 SiO 3 5% -10% of Al 2 O 3 Less than or equal to 4 percent; adding 4-6 mass percent of composite fluxing agent into raw coal, wherein CaCO in the composite fluxing agent 3 The addition amount of the additive is 3-3.5% of the raw coal by mass, and Fe 2 O 3 Or Fe 3 O 4 The addition amount of the coal additive is 2.5-3% of the mass of the raw coal; the invention reduces the ash melting point and adjusts the viscosity-temperature characteristic of the coal ash; the ash melting point is reduced by more than 100 ℃ compared with the conventional fluxing agent.
Description
Technical Field
The invention belongs to the technical field of coal ash fluxing agents, and particularly relates to a coal ash composite fluxing agent and a method for improving the meltability of coal ash.
Background
In order to meet the requirement of liquid slag discharge of high-ash fusion point coal (the flowing temperature of ash is more than 1580 ℃ and exceeds the measurement range of a traditional ash fusion point tester), the general operation temperature of a gasification furnace is 50-100 ℃ higher than the ash fusion point, and the following problems are mainly caused by high-temperature operation: 1. the coal pyrolysis gasification is controlled to be above 950 ℃, the temperature is controlled to be above 1400 ℃, and the temperature space needs to consume a large amount of energy to realize; 2. the operation stability of the high-temperature area is poorer, and the safety is lower; 3. the poor viscosity-temperature characteristic can cause the temperature range of the coal ash in a flowing state to be narrow, the range for controlling the process operation is small, the operation difficulty of the gasification furnace is high, the stability is poor, and the furnace shutdown accident of the gasification furnace caused by slag bonding or poor slag wall hanging is easy to happen.
Therefore, lowering the ash fusion point of coal is an effective way to lower the gasifier operating temperature. The melting point of the raw material coal ash is reduced by adopting the following modes: (1) adding limestone; (2) blending the coal with better coal ash fusibility and gasifying; (3) adding sodium salt; (4) magnesium salt or borax is added. However, in the production practice, the above modes have more problems, such as the problem of unstable slag adhering caused by coal blending; the corrosion problem caused by the dissolution of sodium salt in a grey water system; the effect of magnesium salts is not obvious, which causes the problem of higher ash content. The addition of the conventional calcium fluxing agent causes the phenomenon of extreme point of ash-forming melting point along with the increase of the addition amount, and the melting point of the coal ash cannot be effectively reduced.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a coal ash composite fluxing agent and a method for improving the meltability of the coal ash. In order to achieve the purpose, the invention is realized by the following technical scheme:
the coal ash composite fluxing agent comprises the following components in percentage by weight:
Fe 2 O 3 or Fe 3 O 4 15%~35%
CaCO 3 35%~55%
SiO 2 4%~9%
Na 2 SiO 3 5%~10%
Al 2 O 3 ≤4%。
Preferably, the composition comprises the following components in percentage by weight:
Fe 2 O 3 or Fe 3 O 4 15%~25%
CaCO 3 45%~55%
SiO 2 4%~6%
Na 2 SiO 3 5%~8%
Al 2 O 3 ≤2%。
Preferably, the paint comprises the following components in percentage by weight:
Fe 2 O 3 20%
CaCO 3 50%
SiO 2 6%
Na 2 SiO 3 8%
Al 2 O 3 ≤2%。
preferably, the composite fluxing agent is granular, the mass percentage of the part of the composite fluxing agent seed with the grain diameter of 3-10mm is more than 85%, and the mass percentage of the part of the composite fluxing agent seed with the grain diameter of less than 3mm is less than 10%.
More preferably, the water content of the composite fluxing agent is less than 5%.
A method for improving the meltability of coal ash comprises the steps of adding 4-6% by mass of a composite fluxing agent into raw coal, wherein the composite fluxing agent is the composite fluxing agent in claim 1; caCO in the composite fluxing agent 3 The addition amount of the additive is 3-3.5% of the raw coal by mass, and Fe 2 O 3 Or Fe 3 O 4 The addition amount of the coal additive is 2.5-3% of the mass of the raw coal.
Preferably, the coal ash generated after the raw coal doped with the composite fluxing agent is combusted contains 60-80% of acidic oxide components by mass, 20-30% of alkaline oxide components by mass, and the acid-to-alkali ratio is 2-5.5.
Preferably, the mass percent of the acidic oxide component in the coal ash generated after the raw coal doped with the composite fluxing agent is combusted is 65-75%, the mass percent of the alkaline oxide component is 22-25%, and the acid-base ratio is 3-5.
Compared with the prior art, the invention has the following beneficial effects:
1. the composite fluxing agent for improving the meltability of the coal ash has obvious effect of reducing the melting point of the coal ash, and reduces the ash melting point by about more than 100 ℃ compared with the conventional fluxing agent.
2. The composite fluxing agent for improving the coal ash meltability effectively improves the phenomenon that the ash melting point of the conventional calcium fluxing agent does not decrease or increase reversely along with the increase of the addition amount.
3. The composite fluxing agent disclosed by the invention effectively improves the viscosity-temperature characteristic of coal ash by selecting a reasonable silicon-aluminum ratio, optimizes the technological operation space of the gasification furnace, improves the wall-hanging condition of coal combustion, and prevents the occurrence of conditions that the production cycle is influenced by the slag bonding of the coal ash, such as blowing-out and cleaning.
4. The composite fluxing agent provided by the invention fully considers the problem of stable metering in the coal burning process, has uniform granularity and good fluidity, and can ensure continuous, stable, accurate and reliable quantitative control of small dosage.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of the present invention are described in detail below with reference to examples, but the scope of protection is not limited thereto.
In examples 1 to 8 provided by the present invention, the composite flux was prepared from limestone, iron ore, silica sand and water glass.
The calcium fluxing agent has a 'pole', and when the fluxing agent is added in a certain proportion, the ash melting point is not reduced any more, but is increased. CaCO in composite flux as described in examples 1-8 3 One of the important components of the composite flux is provided by limestone.
SiO 2 And Na 2 SiO 3 As important sources of silicon and sodium in the composite fluxing agent, the silicon component is a traditional acidic component, but when the silicon content in the target coal ash component is within the range of 45-60%, the silicon can effectively reduce the ash melting point and obviously improve the viscosity-temperature characteristic of the coal ash; sodium as an alkali metal component was also effective in lowering the ash melting point, siO in the composite flux described in examples 1-8 2 Supplied from silica sand, na 2 SiO 3 Provided by water glass.
Fe 2 O 3 Or Fe 3 O 4 As an iron-based fluxing agent, the composite fluxing agent is one of important components of the composite fluxing agent, the iron-based fluxing agent is convenient to obtain and is in positive correlation with reduction of ash melting point, but the situation that elemental iron is separated out to influence slag discharge and wall hanging is easy to occur when the iron-based fluxing agent is doped into coal ash. Therefore, the composite fluxing agent of the present invention contains Fe in consideration of the decrease of the ash fusion point and the wall build-up 2 O 3 Or Fe 3 O 4 15% -35% of Fe in the composite fluxing agent of embodiments 1-8 2 O 3 Or Fe 3 O 4 Is provided by iron ore.
Al 2 O 3 As an element that affects the negative adjustment of the ash melting point, the content thereof should be controlled. According to the previous data, al 2 O 3 About 2 to 3% of Fe can be offset for each 1% increase or decrease in the content 2 O 3 And (4) effect.
Research finds that the influence of silicon-aluminum ratio on the melting point of coal ash is mainly classified into four types: (1) For low-calcium and low-iron coal, the type of the glass slag is more obvious when the silicon-aluminum ratio is higher. In the temperature range corresponding to the measurement of the slag viscosity, the influence of the generation and content of crystalline mineral substances on the slag viscosity is negligible, the slag viscosity temperature characteristic mainly depends on the viscosity of liquid slag, and the viscosity of the liquid slag depends on the composition of the slag, particularly SiO 2 /Al 2 O 3 CaO and Fe 2 O 3 The content of (b). In the actual gasification operation, a fluxing agent is required to be added to improve the melting characteristic and the viscosity-temperature characteristic of the coal ash so as to meet the operation requirement of the industrial liquid slag-tapping gasification furnace. (2) The heavy calcium heavy iron coal ash is in a crystalline slag type, the formation of solid crystalline mineral substances has obvious influence on the viscosity of the slag, the content of the crystalline mineral substances reaches 10 percent, and SiO is 2 /Al 2 O 3 At 2.60, the viscosity of the slag suddenly increases, and the upper limit of the viscosity allowed for slag tapping is 25 pas. (3) The heavy calcium high-iron type coal slag is of a crystal slag type, and when the content of crystal minerals reaches 16 percent and SiO is reached 2 /Al 2 O 3 At 3.10, the viscosity of the slag suddenly increases, siO 2 /Al 2 O 3 The viscosity of the ash reaches 25 pas when the viscosity is 2.0; the composition and content of solid crystalline mineral substances in the ash at high temperature, the change of the silicon-aluminum ratio in the liquid-phase slag and the like have important influence on the viscosity of the medium-calcium high-iron coal slag. (4) The high-calcium low-iron type coal ash shows more obvious characteristics of crystalline slag and SiO 2 /A l 2 O 3 The higher the critical viscosity temperature Tcv. The sensitivity of ash viscosity of different samples in the coal types to mineral substances is different, the content of alkaline oxides and the silica-alumina ratio are higher, the sensitivity to the content change of the mineral substances is higher, and the viscosity rises suddenly when the mineral substances reach 10%; sensitive to mineral substances with low content of alkaline oxides and low silicon-aluminum ratioThe degree is low, and the viscosity rises suddenly when the mineral content reaches more than 25%.
Table 1 shows raw coal ash components and target coal type components:
table 2 shows some examples of specific contents of each component in the composite flux for improving the melting property of coal ash according to the present invention. It should be noted that the specific contents of the components of the coal ash melting composite fluxing agent of the present invention are not limited to the data in table 2.
Comparative test example
The performance of the composite fluxing agents of examples 1-8 that improve the meltability of the coal ash was tested. Meanwhile, the performance data of coal combustion by using a common calcium fluxing agent in the prior art are compared, and are specifically shown in table 3.
As can be seen from table 2, the melting point of the coal ash added with the flux described in this example is significantly lower than that of the conventional calcium flux. The calcium fluxing agent is used only, the average value of the flow temperature of the raw material coal is 1387 ℃, the average value of the flow temperature of the raw material coal can be effectively controlled below 1308 ℃ by using the fluxing agent of the embodiment, and no process shutdown accident occurs in the process of using the fluxing agent of the embodiment.
As can be seen from tables 2 and 3, siO in the flux described in this example 2 The optimal range is 4.16% -8.34%; na (Na) 2 SiO 3 The optimal range is 5.44% -9.38%; fe 2 O 3 The optimal range is 16.91% -20.77%; caCO 3 The optimal range is 38.00% -51.25%. Considering the limitations of all coal types, the optimal component proportion of the fluxing agent is as follows: siO 2 2 The optimum range is 4.00%~8.00%；Na 2 SiO 3 The optimal range is 5.00% -9.00%; fe 2 O 3 The optimal range is 15.00% -25.00%; caCO 3 The optimal range is 35.00% -55.00%. Al (aluminum) 2 O 3 The amount of the compound is controlled to be less than 2%.
In summary, the composite fluxing agent for improving the meltability of the coal ash provided by the invention effectively improves the viscosity-temperature characteristics of the coal ash and prolongs the stable operation days of the gasification furnace by adjusting the components and the proportion.
The above is a further detailed description of the present invention with reference to specific preferred embodiments, which should not be considered as limiting the invention to the specific embodiments described herein, but rather as a matter of simple derivation or substitution within the scope of the invention as defined by the appended claims, it will be understood by those skilled in the art to which the invention pertains.
Claims (8)
1. The coal ash composite fluxing agent is characterized by comprising the following components in percentage by weight:
Fe 2 O 3 or Fe 3 O 4 15%~35%
CaCO 3 35%~55%
SiO 2 4%~9%
Na 2 SiO 3 5%~10%
Al 2 O 3 ≤4%。
2. The coal ash composite fluxing agent as claimed in claim 1, which comprises the following components in percentage by weight:
Fe 2 O 3 or Fe 3 O 4 15%~25%
CaCO 3 45%~55%
SiO 2 4%~6%
Na 2 SiO 3 5%~8%
Al 2 O 3 ≤2%。
3. The coal ash composite fluxing agent as claimed in claim 2, which comprises the following components in percentage by weight:
Fe 2 O 3 20%
CaCO 3 50%
SiO 2 6%
Na 2 SiO 3 8%
Al 2 O 3 ≤2%。
4. the coal ash composite fluxing agent as set forth in any one of claims 1 to 3, wherein the composite fluxing agent is in a granular form, a part of the composite fluxing agent with a grain size of 3-10mm is more than 85% by mass, and a part of the composite fluxing agent with a grain size of 3mm or less is less than 10% by mass.
5. The coal ash composite flux according to any one of claims 1 to 3, wherein the water content of the composite flux is less than 5%.
6. A method for improving the meltability of coal ash is characterized by adding 4-6% by mass of a composite fluxing agent into raw coal, wherein the composite fluxing agent is the composite fluxing agent in claim 1; caCO in the composite fluxing agent 3 The addition amount of the additive is 3-3.5% of the raw coal by mass, and Fe 2 O 3 Or Fe 3 O 4 The addition amount of the coal additive is 2.5-3% of the mass of the raw coal.
7. The method for improving the meltability of the coal ash according to claim 6, wherein the mass percent of the acidic oxide component in the coal ash generated after the raw coal doped with the composite fluxing agent is combusted is 60-80%, the mass percent of the alkaline oxide component is 20-30%, and the acid-base ratio is 2-5.5.
8. The method for improving the meltability of the coal ash according to claim 7, wherein the mass percent of the acidic oxide component in the coal ash generated after the raw coal doped with the composite fluxing agent is combusted is 65-75%, the mass percent of the alkaline oxide component is 22-25%, and the acid-base ratio is 3-5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211086260.6A CN115261098A (en) | 2022-09-06 | 2022-09-06 | Coal ash composite fluxing agent and method for improving coal ash meltability |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211086260.6A CN115261098A (en) | 2022-09-06 | 2022-09-06 | Coal ash composite fluxing agent and method for improving coal ash meltability |
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| CN115261098A true CN115261098A (en) | 2022-11-01 |
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| CN202211086260.6A Withdrawn CN115261098A (en) | 2022-09-06 | 2022-09-06 | Coal ash composite fluxing agent and method for improving coal ash meltability |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB116676A (en) * | 1918-02-27 | 1918-06-20 | Rafael Romero Rodriguez Devesa | Improvements relating to Compounds for Increasing the Calorific Value of Coal and like Fuel. |
| CN109679705A (en) * | 2019-01-18 | 2019-04-26 | 平泉腾琚非金属矿物制品制造有限公司 | A kind of composite fluxing agent improving coal ash melting property |
| WO2019137469A1 (en) * | 2018-01-09 | 2019-07-18 | 宝山钢铁股份有限公司 | Method for using cold rolling magnetic filtration waste |
| CN114836250A (en) * | 2022-03-31 | 2022-08-02 | 国家能源集团宁夏煤业有限责任公司 | Fluxing agent, preparation method and application thereof, and method for changing ash fusion characteristics of coal |
-
2022
- 2022-09-06 CN CN202211086260.6A patent/CN115261098A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB116676A (en) * | 1918-02-27 | 1918-06-20 | Rafael Romero Rodriguez Devesa | Improvements relating to Compounds for Increasing the Calorific Value of Coal and like Fuel. |
| WO2019137469A1 (en) * | 2018-01-09 | 2019-07-18 | 宝山钢铁股份有限公司 | Method for using cold rolling magnetic filtration waste |
| CN109679705A (en) * | 2019-01-18 | 2019-04-26 | 平泉腾琚非金属矿物制品制造有限公司 | A kind of composite fluxing agent improving coal ash melting property |
| CN114836250A (en) * | 2022-03-31 | 2022-08-02 | 国家能源集团宁夏煤业有限责任公司 | Fluxing agent, preparation method and application thereof, and method for changing ash fusion characteristics of coal |
Non-Patent Citations (1)
| Title |
|---|
| 张雷;李寒旭;: "铁系助熔剂对煤灰熔融特性影响的研究", 广东化工, vol. 37, no. 02 * |
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Application publication date: 20221101 |