CN1083094A - A kind of method that improves melting point of coal ash for power - Google Patents
A kind of method that improves melting point of coal ash for power Download PDFInfo
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- CN1083094A CN1083094A CN 92109641 CN92109641A CN1083094A CN 1083094 A CN1083094 A CN 1083094A CN 92109641 CN92109641 CN 92109641 CN 92109641 A CN92109641 A CN 92109641A CN 1083094 A CN1083094 A CN 1083094A
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Abstract
A kind of method that improves melting point of coal ash for power, it is a raw material with the steam coal, and blast blending mixes, and because the additive resource is abundanter, and there is superficial part in richness, and the exploitation transportation is all very convenient.Mixed coal has improved ash fusion point, has changed ash component, makes it become more satisfactory industrial combustion coal, has improved the economic benefit in colliery greatly, has enlarged outlet coal market.
Description
The present invention relates to a kind of method that improves melting point of coal ash for power, belong to, improve the utilization ratio of coal for improving the industrial combustion coal.
Except country few in number,, utilize all to show more and more higher interest in the world mostly to the exploitation of carbonic solid fuels.In the exploitation of coal, in the utilization, at first to improve combustion problem, coal ash melting property is the important technology index of burning with coal.Coal ash is meltable, and promptly ash fusion point is low, when then coal burns in the immovable bed coal furnace, easily scabs, and forms big clinker, influence in the stove evenly gas distribution, makes in the stove to draw badly, and the stove utilization ratio reduces, in the time of seriously then stove can not normally move.In the air-flow pool furnace of pulverized coal friring, use the low coal of ash fusion point, then slag droplets hangs on the furnace wall in a large number, can stop up the kiln gas outlet when serious, and stove can not normally be moved.So coal ash fusion temperature is one of a steam coal very important index.Each large-scale coal-fired enterprise all takes much count of the height of coal ash fusion temperature at present, requires us to export coal ash fusion temperature I as Japan
0〉=1250 ℃, in the grey composition, C
oO＜12% is to satisfy the requirement of power plant of the Japanese side technological process of production.Shenmu County's coal calorific value height, ash is low, and sulphur content is low to be good steam coal, and extremely the user welcomes, but its ash fusion point is low, and unstable, it is unfavorable to come for high furnace temperature zone of combustion.
The purpose of this invention is to provide a kind of method that improves melting point of coal ash for power.Shenmu County's pit ash is low, in case meet calcium or the quartzy coal seam of immersing, then ash content increases, and makes components of coal ash take place to change suddenly.Utilize this characteristics, in coal, add external mineral, change coal ash ingredient, improve ash fusion point, make it become more satisfactory burning coal.
For achieving the above object, the present invention adopts following scheme: the steam coal with low ash smelting point is a raw material, and blast blending mixes.
Because it is lower that Shenmu coal ash divides,, still can keep the characteristics of the low ash of Shenmu County's coal even add 5% additive inward.So the consumption 2-10%(weight percent of control additive).
Because the mineral substance in the coal ash can be divided into basic oxide and acidic oxide two big classes, when this two big type oxide just in time can interreaction full form salify, coal ash fusion temperature was minimum; When remaining in addition after wherein the excessive interreaction of a type oxide generates salt, then ash fusion point rises, and superfluous quantity is big more, and the numerical value that ash fusion point increases is just big more.This just makes to add silicon or add sial and improves ash fusion point, and the scheme that changes grey composition becomes a reality.The way that adds calcium as usefulness also can improve ash fusion point, but the calcium oxide content in the grey composition just is greater than 12%.So can only adopt silicon or sial to improve ash fusion point as additive.Additive can refer to quartz sand, encloses the top dirt band, and china clay or kaolin, subordinate list 1 are listed additive chemistry composition table.
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1, get Guo Jia gulf, mining area, Shenmu County coal 95%, to enclose the top dirt band in 5% ratio, be equipped with at each and add 50Kg in the corf of raw coal and enclose the top dirt band, pour tippler together into coal, overturning goes into to be subjected to coalpit, again by being subjected to the coalpit conveyor that bleeds, transport jaw crusher and carry out fragmentation, come out by jaw crusher, particle diameter is less than 50 millimeters coal and enclose top dirt band mixing basically, transports coal store through equipment of conveyer.Ash fusion point is greater than 1250 ℃ by analysis.
Embodiment 2, get Guo Jia gulf, mining area, Shenmu County coal 97%, with quartz sand after pulverizer is milled down to 0.5 millimeter particle diameter, leave ground pit bottom in, the ratio in 3% is equipped with at each and adds 30Kg silica powder in the mine car of raw coal and raw coal goes into to be subjected to coalpit through the tippler overturning together, rotary conveyor bleeds, send into the jaw crushing crusher machine, simultaneously that silica powder and coal is even, the coal that comes out by crusher, send into coal store through conveyor, ash fusion point is greater than 1250 ℃ by analysis.
Embodiment 3, get Guo Jia gulf, mining area, Shenmu County coal 95%, in 5% ratio, step is with embodiment 2 with china clay breeze or kaolin breeze, and ash fusion point is greater than 1250 ℃.
Advantage of the present invention is, implements easily, and the resource of additive is abundanter, and there is superficial part in richness, and Mining Transport is all very convenient, and the enforcement of the method has changed components of coal ash, has improved ash fusion point, makes it become more satisfactory burning coal. Improve the economic benefit in colliery, enlarged export coal market.
Claims (4)
1, a kind of method that improves melting point of coal ash for power is characterized in that it is a raw material with the steam coal of low ash smelting point, and blast blending mixes.
2, by the described method of claim 1, it is characterized in that described low-ash-fusion coal content is 96-90%, additive level is the 2-10%(weight percent).
3, by the described method of claim 2, it is characterized in that the described coal of making low ash smelting point can refer to steam coals such as Shenmu County, its ash fusion point is below 1250 ℃.
4, by claim 2 or 3 described methods, it is characterized in that described additive can refer to quartz sand, encloses top dirt band, china clay, kaolin or calcium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92109641 CN1083094A (en) | 1992-08-24 | 1992-08-24 | A kind of method that improves melting point of coal ash for power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92109641 CN1083094A (en) | 1992-08-24 | 1992-08-24 | A kind of method that improves melting point of coal ash for power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1083094A true CN1083094A (en) | 1994-03-02 |
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ID=4944266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92109641 Pending CN1083094A (en) | 1992-08-24 | 1992-08-24 | A kind of method that improves melting point of coal ash for power |
Country Status (1)
| Country | Link |
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| CN (1) | CN1083094A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103013617A (en) * | 2013-01-08 | 2013-04-03 | 华北电力大学 | Industrial residue boiler anti-coking agent and application method thereof |
| CN106701249A (en) * | 2017-01-19 | 2017-05-24 | 南京大学 | Modifier for adjusting coal ash fusant rheological characteristics and slagging microstructure and using method thereof |
-
1992
- 1992-08-24 CN CN 92109641 patent/CN1083094A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103013617A (en) * | 2013-01-08 | 2013-04-03 | 华北电力大学 | Industrial residue boiler anti-coking agent and application method thereof |
| CN106701249A (en) * | 2017-01-19 | 2017-05-24 | 南京大学 | Modifier for adjusting coal ash fusant rheological characteristics and slagging microstructure and using method thereof |
| CN106701249B (en) * | 2017-01-19 | 2019-08-16 | 南京大学 | A kind of regulator and its application method adjusting coal ash fusant rheological behavior and slagging micro-structure |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |