CN110499198A - A kind of moulded coal and preparation method thereof added with red mud - Google Patents
A kind of moulded coal and preparation method thereof added with red mud Download PDFInfo
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- CN110499198A CN110499198A CN201910786125.4A CN201910786125A CN110499198A CN 110499198 A CN110499198 A CN 110499198A CN 201910786125 A CN201910786125 A CN 201910786125A CN 110499198 A CN110499198 A CN 110499198A
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- red mud
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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
- C10L10/02—Use of additives to fuels or fires for particular purposes for reducing smoke development
-
- 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
-
- 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
-
- 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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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Coke Industry (AREA)
Abstract
The invention proposes a kind of moulded coal and preparation method thereof added with red mud, raw material comprising following parts by weight: 60-70 parts of coal, 5-9 parts of red mud, 1-5 parts of dispersing agent, 2-5 parts of gelatinized starch, the dispersing agent is naphthalene system dispersing agent, the coal is semi-coke or anthracite, the present invention is based on fine coal, red mud is sulphur-fixing agent, the environmentally friendly moulded coal of other substances such as binder preparation energy-saving and emission-reduction is added again, both the problem of red mud utilizes had been can solve, it can solve red mud and coal-fired pollution on the environment problem again, achieved the effect that the treatment of wastes with processes of wastes against one another.
Description
Technical field
The present invention relates to clean coal technical field, specially a kind of moulded coal and preparation method thereof added with red mud.
Background technique
Moulded coal refers to according to certain granularity requirements, by one or more of coal dusts centainly than column additive, (binder is helped
Fire agent and sulphur-fixing agent) it is existing under the conditions of, act on, be processed into certain shape and physicochemical properties through certain pressure
Coal product.China is the country using coal as main energy sources, and coal accounts for 75% or more, 80% in non-renewable energy total quantity consumed
Above for directly burning, but since coal in China generally quality is not high, high-sulfur and dirty coal than great, no environmental protection measure
Burning will cause the environmental problems such as haze, acid rain.Therefore realize that emission reduction is more feasible using the measure of front-end control.Current energy
Source current condition of consumption determines that the emphasis point of Chinese energy policy adjustment is to the cleaning of coal, efficient uses.As clean
One kind of clean coal production technology, clean type coal is produced with easy to operate, technology maturation, low in cost, energy efficiency is obvious, useless
The advantages that gas discharge amount is reduced is worth us to go to explore, study and developed, promoted.Moulded coal is compared with raw coal, coal powder formation
Afterwards using have it is various a little:
1, stove efficiency 5%-13% can be improved, to save coal 7%-15%.
2, dust discharge amount 30%~60% can be reduced, to reduce the content of dust particle in atmosphere.
3, using the moulded coal of additive for sulfur capture, SO can be reduced220%-50% is discharged, contains acid rain to a certain extent
Harm, protect environment.
4, other coal-fired discharge of poisonous waste can be made to reduce.
Red mud is that aluminium industry extracts the pollution waste residue being discharged when aluminium oxide, and average 1 ton of aluminium oxide of every production is subsidiary to produce
Raw 1.0-2.0 tons of red muds.The comprehensive utilization ratio of China's red mud only has 4% at present, and as the production of aluminium oxide is constantly increasing,
A large amount of soil is not only taken up, and pollution also is also resulted in environment.
So researching and developing the technology that is recycled of red mud cheap and easy to get, raising red mud utilization rate, and exploitation reduction are red
The technology of mud and coal-fired environmental pollution is extremely urgent.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the existing defects, provides a kind of moulded coal and its system added with red mud
Preparation Method, based on fine coal, red mud is sulphur-fixing agent, then other substances preparation energy-saving and emission-reduction such as add binder is environmental-friendly
Type moulded coal can effectively solve the problems in background technique.
To achieve the above object, the present invention proposes a kind of moulded coal added with red mud, the raw material comprising following parts by weight: coal
60-70 parts of charcoal, 5-9 parts of red mud, 1-5 parts of dispersing agent, 2-5 parts of gelatinized starch.
As a preferred technical solution of the present invention: the dispersing agent be naphthalene system dispersing agent, the coal be semi-coke or
Anthracite.
The present invention also provides a kind of preparation methods of moulded coal added with red mud, comprising the following steps:
S1) coal is classified: block-like coal being crushed, is sieved, is saved by the different granularities with grade.
S2) red mud pre-processes: red mud is immersed in dispersant solution by configuration dispersant solution, after the completion, is taken out and is dried
It is dry.
S3) prepared by moulded coal: parts by weight difference being added according to the ratio with the coal of grade, adds coal slime, the gelatinization of parts by weight
Starch and red mud add 80-100 DEG C of water and are uniformly mixed, and mold compacting spontaneously dries.
As a preferred technical solution of the present invention: in the step 1 with grade be 4-2mm, 2-0.25mm and≤
0.25mm。
As a preferred technical solution of the present invention: the dispersant solution concentration in the step 2 is 0.5-5%, institute
Stating soaking time of the red mud in dispersant solution is 5-10min.
As a preferred technical solution of the present invention: 4-2mm, 2-0.25mm and≤0.25mm match grade in the step 3
Coal proportion be 1:6:6.
Compared with prior art, the beneficial effects of the present invention are:
Strong, content of beary metal height of alkalinity of red mud etc..Using with low ash, low-sulfur, low-phosphorous, low volatile good characteristic
Semi-coke combined with red mud and prepare moulded coal, can not only the higher anthracite of alternative cost can also be preferable as clean energy resource
Using the comprehensive utilization of red mud exploitation red mud, recycling for resource is realized, reduce cultivated land occupancy；Consolidating in effective use red mud
Sulphur ingredient consolidates sulphur, achievees the effect that emission reduction, is all of great significance to society, energy economy & environment protection aspect.
The present invention prepares moulded coal using the characteristics of red mud itself in conjunction with coal facies, both can solve the problem of red mud utilizes,
It can solve red mud and coal-fired pollution on the environment problem again, achieved the effect that the treatment of wastes with processes of wastes against one another.
Detailed description of the invention
Fig. 1 is the intensity contrast figure of sintering process and Bayer process red mud moulded coal under different red mud contents；
Fig. 2 is the moulded coal ash content XRD diagram of different red muds addition；
Fig. 3 is CaSO in different content of red mud moulded coal ash contents4Relative amount XRD diagram；
Fig. 4 is semi-coke XRD diagram；
Fig. 5 is red mud from sintering process XRD diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention the following technical schemes are provided:
A kind of moulded coal added with red mud, the raw material comprising following parts by weight: 60-70 parts of coal, 5-9 parts of red mud, dispersion
1-5 parts of agent, 2-5 parts of gelatinized starch.
The dispersing agent is naphthalene system dispersing agent, and the coal is semi-coke or anthracite.
It will proportionally be mixed with the coal after grade.
Embodiment one:
65 parts of mixed coals are taken, 5 parts of red mud from sintering process or Bayer process red mud, 2 parts of gelatinized starches, the 90 of 21 parts is added
DEG C water, is mixed.
Red mud dispersed agent solution immersion before being mixed into.
Wherein coal includes that 5 parts of 4-2mm, 30 parts of 2-0.25mm and 30 part≤0.25mm match the coal dust or coal slime of grade.
After mold compacting, natural air drying.
Embodiment two:
65 parts of mixed coals are taken, 6 parts of red mud from sintering process or Bayer process red mud, 2 parts of gelatinized starches, the 90 of 21 parts is added
DEG C water, is mixed.
Red mud dispersed agent solution immersion before being mixed into.
Wherein coal includes that 5 parts of 4-2mm, 30 parts of 2-0.25mm and 30 part≤0.25mm match the coal dust or coal slime of grade.
After mold compacting, natural air drying.
Embodiment three:
65 parts of mixed coals are taken, 7 parts of red mud from sintering process or Bayer process red mud, 2 parts of gelatinized starches, the 90 of 21 parts is added
DEG C water, is mixed.
Red mud dispersed agent solution immersion before being mixed into.
Wherein coal includes that 5 parts of 4-2mm, 30 parts of 2-0.25mm and 30 part≤0.25mm match the coal dust or coal slime of grade.
After mold compacting, natural air drying.
Example IV:
65 parts of mixed coals are taken, 8 parts of red mud from sintering process or Bayer process red mud, 2 parts of gelatinized starches, the 90 of 21 parts is added
DEG C water, is mixed.
Red mud dispersed agent solution immersion before being mixed into.
Wherein coal includes that 5 parts of 4-2mm, 30 parts of 2-0.25mm and 30 part≤0.25mm match the coal dust or coal slime of grade.
After mold compacting, natural air drying.
After completing mold compacting, test moulded coal is wet strong, and dry strong and BET is tested after moulded coal is dry, dry to reach 60kg or more by force
For qualification, moulded coal is crushed to 0.2mm or less and does Industrial Analysis.In addition, preparing in the same manner, combustion experiment is done, is surveyed
Try the discharge amount of SO2, NO.
The variation of briquette strength:
As described in Figure 1, red mud from sintering process is identical as the briquette strength trend of Bayer process red mud, first increases and then decreases, Bayer
The integral strength of method red mud moulded coal is slightly above red mud from sintering process, and all in the additive amount of red mud 6%, has maximum intensity.
Gas discharge when Combustion of Mould Coal:
Table 1 is content of red mud different in moulded coal, the gas that every gram of Combustion of Mould Coal is released, from table 1 it follows that with
The additive amount of red mud increases, and the discharge amount of Combustion of Mould Coal pernicious gas gradually decreases.Effective component in red mud is shown to subtracting
Few pernicious gas is that effectively, it is feasible for adding red mud to consolidate the method for sulphur in moulded coal.Table 2 is moulded coal Industrial Analysis detection knot
The total sulfur measurement of fruit, coal uses full-automatic analyzer, Coulomb equation, GB/T214-2007.According to calculating, this kind of moulded coal
Sulfur-fixing rate is 80%.
When 1 difference red mud content of table, the gas unit of every gram of Combustion of Mould Coal releasing: mg
2 moulded coal Industrial Analysis testing result of table
The ingredient of Combustion of Mould Coal ash content:
Fig. 2 is the XRD diagram of the Combustion of Mould Coal ash content of the content of red mud of 5%-7%, and Fig. 3 is different content of red mud moulded coals
CaSO in ash content4Relative amount XRD diagram, by Fig. 2-3 it can be seen that containing more 2 θ=25 °, 41 ° in moulded coal ash content
CaSO4, indicated with 1 in figure.
Fig. 4 is semi-coke XRD diagram, predominantly CaCO in semi-coke3。
Fig. 5 is red mud from sintering process XRD diagram, predominantly CaCO in red mud from sintering process3.Therefore not sulfur-bearing in red mud and semi-coke,
CaSO4Presence illustrate that the effective component of red mud can be by SO2It is fixed in ash content, reduces SO2Discharge, reduce to big
The pollution of gas.Fig. 3 is the CaSO in moulded coal ash content under the addition of different red muds4Relative amount comparison, the chart are bright different amounts of red
Mud addition has captured sulfur result, and 6% content of red mud effect is more preferable.
Benefit of the present invention:
1, the present invention prepares moulded coal using additive for sulfur capture red mud, and raw material is cheap and easy to get, and simple process.
2, production moulded coal can effectively reduce SO2The discharge of equal pernicious gases, reduces the pollution to atmosphere, belongs to cleaning
Type moulded coal, and itself there is the red mud centainly polluted to have obtained rationally effectively using, approach is opened for the application of red mud.
3, it is suitble to industrial production to use.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of moulded coal added with red mud, which is characterized in that the raw material comprising following parts by weight: 60-70 parts of coal, red mud 5-
9 parts, 1-5 parts of dispersing agent, 2-5 parts of gelatinized starch.
2. a kind of moulded coal added with red mud according to claim 1, it is characterised in that: the dispersing agent is the dispersion of naphthalene system
Agent, the coal are semi-coke or anthracite.
3. a kind of preparation method of the moulded coal added with red mud, it is characterised in that: the following steps are included:
S1) coal is classified: block-like coal being crushed, is sieved, is saved by the different granularities with grade.
S2) red mud pre-processes: red mud is immersed in dispersant solution by configuration dispersant solution, after the completion, takes out drying.
S3) prepared by moulded coal: parts by weight difference being added according to the ratio with the coal of grade, adds coal slime, the gelatinized starch of parts by weight
And red mud, it adds 80-100 DEG C of water and is uniformly mixed, mold compacting spontaneously dries.
4. a kind of preparation method of moulded coal added with red mud according to claim 3, it is characterised in that: the step 1
In with grade be 4-2mm, 2-0.25mm and≤0.25mm.
5. a kind of preparation method of moulded coal added with red mud according to claim 3, it is characterised in that: the step 2
In dispersant solution concentration be 0.5-5%, soaking time of the red mud in dispersant solution be 5-10min.
6. a kind of preparation method of moulded coal added with red mud according to claim 4, it is characterised in that: the step 3
The coal proportion of middle 4-2mm, 2-0.25mm and≤0.25mm with grade is 1:6:6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910786125.4A CN110499198A (en) | 2019-08-23 | 2019-08-23 | A kind of moulded coal and preparation method thereof added with red mud |
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| CN201910786125.4A CN110499198A (en) | 2019-08-23 | 2019-08-23 | A kind of moulded coal and preparation method thereof added with red mud |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266805A (en) * | 2020-09-04 | 2021-01-26 | 中国科学院山西煤炭化学研究所 | Method for preparing industrial briquette by utilizing combustible solid waste |
| CN113265285A (en) * | 2021-04-29 | 2021-08-17 | 西安交通大学 | PM (particulate matter)2.5Emission-reduction clean coal and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212406A (en) * | 2011-04-25 | 2011-10-12 | 山东大学 | Method for preparing sulfur-fixing agent by taking red mud in alumina plant as additive as well as product and application of sulfur-fixing agent |
| CN104629845A (en) * | 2013-11-15 | 2015-05-20 | 浙江省海洋开发研究院 | Method for preparing biomass briquette by using oil sludge instead of forming binders |
| CN108251174A (en) * | 2018-01-23 | 2018-07-06 | 龚长海 | A kind of environmental protection solid sulphur formed coal and preparation method thereof |
-
2019
- 2019-08-23 CN CN201910786125.4A patent/CN110499198A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212406A (en) * | 2011-04-25 | 2011-10-12 | 山东大学 | Method for preparing sulfur-fixing agent by taking red mud in alumina plant as additive as well as product and application of sulfur-fixing agent |
| CN104629845A (en) * | 2013-11-15 | 2015-05-20 | 浙江省海洋开发研究院 | Method for preparing biomass briquette by using oil sludge instead of forming binders |
| CN108251174A (en) * | 2018-01-23 | 2018-07-06 | 龚长海 | A kind of environmental protection solid sulphur formed coal and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266805A (en) * | 2020-09-04 | 2021-01-26 | 中国科学院山西煤炭化学研究所 | Method for preparing industrial briquette by utilizing combustible solid waste |
| CN112266805B (en) * | 2020-09-04 | 2022-04-15 | 中国科学院山西煤炭化学研究所 | Method for preparing industrial briquette by utilizing combustible solid waste |
| CN113265285A (en) * | 2021-04-29 | 2021-08-17 | 西安交通大学 | PM (particulate matter)2.5Emission-reduction clean coal and preparation method thereof |
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